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 editting 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 editting 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          * editting 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 unsuccessfull
 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          * @var Article
 170          */
 171         var $mArticle;
 172
 173         /**
 174          * @var Title
 175          */
 176         var $mTitle;
 177         private $mContextTitle = null;
 178         var $action = 'submit';
 179         var $isConflict = false;
 180         var $isCssJsSubpage = false;
 181         var $isCssSubpage = false;
 182         var $isJsSubpage = false;
 183         var $isWrongCaseCssJsPage = false;
 184         var $isNew = false; // new page or new section
 185         var $deletedSinceEdit;
 186         var $formtype;
 187         var $firsttime;
 188         var $lastDelete;
 189         var $mTokenOk = false;
 190         var $mTokenOkExceptSuffix = false;
 191         var $mTriedSave = false;
 192         var $incompleteForm = false;
 193         var $tooBig = false;
 194         var $kblength = false;
 195         var $missingComment = false;
 196         var $missingSummary = false;
 197         var $allowBlankSummary = false;
 198         var $autoSumm = '';
 199         var $hookError = '';
 200         #var $mPreviewTemplates;
 201
 202         /**
 203          * @var ParserOutput
 204          */
 205         var $mParserOutput;
 206
 207         /**
 208          * Has a summary been preset using GET parameter &summary= ?
 209          * @var Bool
 210          */
 211         var $hasPresetSummary = false;
 212
 213         var $mBaseRevision = false;
 214         var $mShowSummaryField = true;
 215
 216         # Form values
 217         var $save = false, $preview = false, $diff = false;
 218         var $minoredit = false, $watchthis = false, $recreate = false;
 219         var $textbox1 = '', $textbox2 = '', $summary = '', $nosummary = false;
 220         var $edittime = '', $section = '', $sectiontitle = '', $starttime = '';
 221         var $oldid = 0, $editintro = '', $scrolltop = null, $bot = true;
 222         var $contentModel = null, $contentFormat = null;
 223
 224         # Placeholders for text injection by hooks (must be HTML)
 225         # extensions should take care to _append_ to the present value
 226         public $editFormPageTop = ''; // Before even the preview
 227         public $editFormTextTop = '';
 228         public $editFormTextBeforeContent = '';
 229         public $editFormTextAfterWarn = '';
 230         public $editFormTextAfterTools = '';
 231         public $editFormTextBottom = '';
 232         public $editFormTextAfterContent = '';
 233         public $previewTextAfterContent = '';
 234         public $mPreloadContent = null;
 235
 236         /* $didSave should be set to true whenever an article was succesfully altered. */
 237         public $didSave = false;
 238         public $undidRev = 0;
 239
 240         public $suppressIntro = false;
 241
 242         /**
 243          * Set to true to allow editing of non-text content types.
 244          *
 245          * @var bool
 246          */
 247         public $allowNonTextContent = false;
 248
 249         /**
 250          * @param $article Article
 251          */
 252         public function __construct( Article $article ) {
 253                 $this->mArticle = $article;
 254                 $this->mTitle = $article->getTitle();
 255
 256                 $this->contentModel = $this->mTitle->getContentModel();
 257
 258                 $handler = ContentHandler::getForModelID( $this->contentModel );
 259                 $this->contentFormat = $handler->getDefaultFormat();
 260         }
 261
 262         /**
 263          * @return Article
 264          */
 265         public function getArticle() {
 266                 return $this->mArticle;
 267         }
 268
 269         /**
 270          * @since 1.19
 271          * @return Title
 272          */
 273         public function getTitle() {
 274                 return $this->mTitle;
 275         }
 276
 277         /**
 278          * Set the context Title object
 279          *
 280          * @param $title Title object or null
 281          */
 282         public function setContextTitle( $title ) {
 283                 $this->mContextTitle = $title;
 284         }
 285
 286         /**
 287          * Get the context title object.
 288          * If not set, $wgTitle will be returned. This behavior might change in
 289          * the future to return $this->mTitle instead.
 290          *
 291          * @return Title object
 292          */
 293         public function getContextTitle() {
 294                 if ( is_null( $this->mContextTitle ) ) {
 295                         global $wgTitle;
 296                         return $wgTitle;
 297                 } else {
 298                         return $this->mContextTitle;
 299                 }
 300         }
 301
 302         function submit() {
 303                 $this->edit();
 304         }
 305
 306         /**
 307          * This is the function that gets called for "action=edit". It
 308          * sets up various member variables, then passes execution to
 309          * another function, usually showEditForm()
 310          *
 311          * The edit form is self-submitting, so that when things like
 312          * preview and edit conflicts occur, we get the same form back
 313          * with the extra stuff added.  Only when the final submission
 314          * is made and all is well do we actually save and redirect to
 315          * the newly-edited page.
 316          */
 317         function edit() {
 318                 global $wgOut, $wgRequest, $wgUser;
 319                 // Allow extensions to modify/prevent this form or submission
 320                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 321                         return;
 322                 }
 323
 324                 wfProfileIn( __METHOD__ );
 325                 wfDebug( __METHOD__ . ": enter\n" );
 326
 327                 // If they used redlink=1 and the page exists, redirect to the main article
 328                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 329                         $wgOut->redirect( $this->mTitle->getFullURL() );
 330                         wfProfileOut( __METHOD__ );
 331                         return;
 332                 }
 333
 334                 $this->importFormData( $wgRequest );
 335                 $this->firsttime = false;
 336
 337                 if ( $this->live ) {
 338                         $this->livePreview();
 339                         wfProfileOut( __METHOD__ );
 340                         return;
 341                 }
 342
 343                 if ( wfReadOnly() && $this->save ) {
 344                         // Force preview
 345                         $this->save = false;
 346                         $this->preview = true;
 347                 }
 348
 349                 if ( $this->save ) {
 350                         $this->formtype = 'save';
 351                 } elseif ( $this->preview ) {
 352                         $this->formtype = 'preview';
 353                 } elseif ( $this->diff ) {
 354                         $this->formtype = 'diff';
 355                 } else { # First time through
 356                         $this->firsttime = true;
 357                         if ( $this->previewOnOpen() ) {
 358                                 $this->formtype = 'preview';
 359                         } else {
 360                                 $this->formtype = 'initial';
 361                         }
 362                 }
 363
 364                 $permErrors = $this->getEditPermissionErrors();
 365                 if ( $permErrors ) {
 366                         wfDebug( __METHOD__ . ": User can't edit\n" );
 367                         // Auto-block user's IP if the account was "hard" blocked
 368                         $wgUser->spreadAnyEditBlock();
 369
 370                         $this->displayPermissionsError( $permErrors );
 371
 372                         wfProfileOut( __METHOD__ );
 373                         return;
 374                 }
 375
 376                 wfProfileIn( __METHOD__ . "-business-end" );
 377
 378                 $this->isConflict = false;
 379                 // css / js subpages of user pages get a special treatment
 380                 $this->isCssJsSubpage       = $this->mTitle->isCssJsSubpage();
 381                 $this->isCssSubpage         = $this->mTitle->isCssSubpage();
 382                 $this->isJsSubpage          = $this->mTitle->isJsSubpage();
 383                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 384
 385                 # Show applicable editing introductions
 386                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 387                         $this->showIntro();
 388                 }
 389
 390                 # Attempt submission here.  This will check for edit conflicts,
 391                 # and redundantly check for locked database, blocked IPs, etc.
 392                 # that edit() already checked just in case someone tries to sneak
 393                 # in the back door with a hand-edited submission URL.
 394
 395                 if ( 'save' == $this->formtype ) {
 396                         if ( !$this->attemptSave() ) {
 397                                 wfProfileOut( __METHOD__ . "-business-end" );
 398                                 wfProfileOut( __METHOD__ );
 399                                 return;
 400                         }
 401                 }
 402
 403                 # First time through: get contents, set time for conflict
 404                 # checking, etc.
 405                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 406                         if ( $this->initialiseForm() === false ) {
 407                                 $this->noSuchSectionPage();
 408                                 wfProfileOut( __METHOD__ . "-business-end" );
 409                                 wfProfileOut( __METHOD__ );
 410                                 return;
 411                         }
 412
 413                         if ( !$this->mTitle->getArticleID() ) {
 414                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 415                         } else {
 416                                 wfRunHooks( 'EditFormInitialText', array( $this ) );
 417                         }
 418
 419                 }
 420
 421                 $this->showEditForm();
 422                 wfProfileOut( __METHOD__ . "-business-end" );
 423                 wfProfileOut( __METHOD__ );
 424         }
 425
 426         /**
 427          * @return array
 428          */
 429         protected function getEditPermissionErrors() {
 430                 global $wgUser;
 431                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 432                 # Can this title be created?
 433                 if ( !$this->mTitle->exists() ) {
 434                         $permErrors = array_merge( $permErrors,
 435                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 436                 }
 437                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 438                 $remove = array();
 439                 foreach ( $permErrors as $error ) {
 440                         if ( ( $this->preview || $this->diff ) &&
 441                                 ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' ) )
 442                         {
 443                                 $remove[] = $error;
 444                         }
 445                 }
 446                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 447                 return $permErrors;
 448         }
 449
 450         /**
 451          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 452          * but with the following differences:
 453          * - If redlink=1, the user will be redirected to the page
 454          * - If there is content to display or the error occurs while either saving,
 455          *   previewing or showing the difference, it will be a
 456          *   "View source for ..." page displaying the source code after the error message.
 457          *
 458          * @since 1.19
 459          * @param $permErrors Array of permissions errors, as returned by
 460          *                    Title::getUserPermissionsErrors().
 461          * @throws PermissionsError
 462          */
 463         protected function displayPermissionsError( array $permErrors ) {
 464                 global $wgRequest, $wgOut;
 465
 466                 if ( $wgRequest->getBool( 'redlink' ) ) {
 467                         // The edit page was reached via a red link.
 468                         // Redirect to the article page and let them click the edit tab if
 469                         // they really want a permission error.
 470                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 471                         return;
 472                 }
 473
 474                 $content = $this->getContentObject();
 475
 476                 # Use the normal message if there's nothing to display
 477                 if ( $this->firsttime && ( !$content || $content->isEmpty() ) ) {
 478                         $action = $this->mTitle->exists() ? 'edit' :
 479                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 480                         throw new PermissionsError( $action, $permErrors );
 481                 }
 482
 483                 $wgOut->setPageTitle( wfMessage( 'viewsource-title', $this->getContextTitle()->getPrefixedText() ) );
 484                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 485                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 486                 $wgOut->addHTML( "<hr />\n" );
 487
 488                 # If the user made changes, preserve them when showing the markup
 489                 # (This happens when a user is blocked during edit, for instance)
 490                 if ( !$this->firsttime ) {
 491                         $text = $this->textbox1;
 492                         $wgOut->addWikiMsg( 'viewyourtext' );
 493                 } else {
 494                         $text = $this->toEditText( $content );
 495                         $wgOut->addWikiMsg( 'viewsourcetext' );
 496                 }
 497
 498                 $this->showTextbox( $text, 'wpTextbox1', array( 'readonly' ) );
 499
 500                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 501                         Linker::formatTemplates( $this->getTemplates() ) ) );
 502
 503                 if ( $this->mTitle->exists() ) {
 504                         $wgOut->returnToMain( null, $this->mTitle );
 505                 }
 506         }
 507
 508         /**
 509          * Show a read-only error
 510          * Parameters are the same as OutputPage:readOnlyPage()
 511          * Redirect to the article page if redlink=1
 512          * @deprecated in 1.19; use displayPermissionsError() instead
 513          */
 514         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 515                 wfDeprecated( __METHOD__, '1.19' );
 516
 517                 global $wgRequest, $wgOut;
 518                 if ( $wgRequest->getBool( 'redlink' ) ) {
 519                         // The edit page was reached via a red link.
 520                         // Redirect to the article page and let them click the edit tab if
 521                         // they really want a permission error.
 522                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 523                 } else {
 524                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 525                 }
 526         }
 527
 528         /**
 529          * Should we show a preview when the edit form is first shown?
 530          *
 531          * @return bool
 532          */
 533         protected function previewOnOpen() {
 534                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 535                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 536                         // Explicit override from request
 537                         return true;
 538                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 539                         // Explicit override from request
 540                         return false;
 541                 } elseif ( $this->section == 'new' ) {
 542                         // Nothing *to* preview for new sections
 543                         return false;
 544                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 545                         // Standard preference behaviour
 546                         return true;
 547                 } elseif ( !$this->mTitle->exists() &&
 548                   isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] ) &&
 549                   $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 550                 {
 551                         // Categories are special
 552                         return true;
 553                 } else {
 554                         return false;
 555                 }
 556         }
 557
 558         /**
 559          * Checks whether the user entered a skin name in uppercase,
 560          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 561          *
 562          * @return bool
 563          */
 564         protected function isWrongCaseCssJsPage() {
 565                 if ( $this->mTitle->isCssJsSubpage() ) {
 566                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 567                         $skins = array_merge(
 568                                 array_keys( Skin::getSkinNames() ),
 569                                 array( 'common' )
 570                         );
 571                         return !in_array( $name, $skins )
 572                                 && in_array( strtolower( $name ), $skins );
 573                 } else {
 574                         return false;
 575                 }
 576         }
 577
 578         /**
 579          * Does this EditPage class support section editing?
 580          * This is used by EditPage subclasses to indicate their ui cannot handle section edits
 581          *
 582          * @return bool
 583          */
 584         protected function isSectionEditSupported() {
 585                 return true;
 586         }
 587
 588         /**
 589          * This function collects the form data and uses it to populate various member variables.
 590          * @param $request WebRequest
 591          */
 592         function importFormData( &$request ) {
 593                 global $wgContLang, $wgUser;
 594
 595                 wfProfileIn( __METHOD__ );
 596
 597                 # Section edit can come from either the form or a link
 598                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 599                 $this->isNew = !$this->mTitle->exists() || $this->section == 'new';
 600
 601                 if ( $request->wasPosted() ) {
 602                         # These fields need to be checked for encoding.
 603                         # Also remove trailing whitespace, but don't remove _initial_
 604                         # whitespace from the text boxes. This may be significant formatting.
 605                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 606                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 607                                 // Skip this if wpTextbox2 has input, it indicates that we came
 608                                 // from a conflict page with raw page text, not a custom form
 609                                 // modified by subclasses
 610                                 wfProfileIn( get_class( $this ) . "::importContentFormData" );
 611                                 $textbox1 = $this->importContentFormData( $request );
 612                                 if ( isset( $textbox1 ) ) {
 613                                         $this->textbox1 = $textbox1;
 614                                 }
 615
 616                                 wfProfileOut( get_class( $this ) . "::importContentFormData" );
 617                         }
 618
 619                         # Truncate for whole multibyte characters
 620                         $this->summary = $wgContLang->truncate( $request->getText( 'wpSummary' ), 255 );
 621
 622                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 623                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 624                         # section titles.
 625                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 626
 627                         # Treat sectiontitle the same way as summary.
 628                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 629                         # currently doing double duty as both edit summary and section title. Right now this
 630                         # is just to allow API edits to work around this limitation, but this should be
 631                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 632                         $this->sectiontitle = $wgContLang->truncate( $request->getText( 'wpSectionTitle' ), 255 );
 633                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 634
 635                         $this->edittime = $request->getVal( 'wpEdittime' );
 636                         $this->starttime = $request->getVal( 'wpStarttime' );
 637
 638                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 639
 640                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 641                                 // wpTextbox1 field is missing, possibly due to being "too big"
 642                                 // according to some filter rules such as Suhosin's setting for
 643                                 // suhosin.request.max_value_length (d'oh)
 644                                 $this->incompleteForm = true;
 645                         } else {
 646                                 // edittime should be one of our last fields; if it's missing,
 647                                 // the submission probably broke somewhere in the middle.
 648                                 $this->incompleteForm = is_null( $this->edittime );
 649                         }
 650                         if ( $this->incompleteForm ) {
 651                                 # If the form is incomplete, force to preview.
 652                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 653                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 654                                 $this->preview = true;
 655                         } else {
 656                                 /* Fallback for live preview */
 657                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 658                                 $this->diff = $request->getCheck( 'wpDiff' );
 659
 660                                 // Remember whether a save was requested, so we can indicate
 661                                 // if we forced preview due to session failure.
 662                                 $this->mTriedSave = !$this->preview;
 663
 664                                 if ( $this->tokenOk( $request ) ) {
 665                                         # Some browsers will not report any submit button
 666                                         # if the user hits enter in the comment box.
 667                                         # The unmarked state will be assumed to be a save,
 668                                         # if the form seems otherwise complete.
 669                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 670                                 } elseif ( $this->diff ) {
 671                                         # Failed token check, but only requested "Show Changes".
 672                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 673                                 } else {
 674                                         # Page might be a hack attempt posted from
 675                                         # an external site. Preview instead of saving.
 676                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 677                                         $this->preview = true;
 678                                 }
 679                         }
 680                         $this->save = !$this->preview && !$this->diff;
 681                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 682                                 $this->edittime = null;
 683                         }
 684
 685                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 686                                 $this->starttime = null;
 687                         }
 688
 689                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 690
 691                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 692                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 693
 694                         # Don't force edit summaries when a user is editing their own user or talk page
 695                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 696                                 $this->mTitle->getText() == $wgUser->getName() )
 697                         {
 698                                 $this->allowBlankSummary = true;
 699                         } else {
 700                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary' );
 701                         }
 702
 703                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 704                 } else {
 705                         # Not a posted form? Start with nothing.
 706                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 707                         $this->textbox1     = '';
 708                         $this->summary      = '';
 709                         $this->sectiontitle = '';
 710                         $this->edittime     = '';
 711                         $this->starttime    = wfTimestampNow();
 712                         $this->edit         = false;
 713                         $this->preview      = false;
 714                         $this->save         = false;
 715                         $this->diff         = false;
 716                         $this->minoredit    = false;
 717                         $this->watchthis    = $request->getBool( 'watchthis', false ); // Watch may be overriden by request parameters
 718                         $this->recreate     = false;
 719
 720                         // When creating a new section, we can preload a section title by passing it as the
 721                         // preloadtitle parameter in the URL (Bug 13100)
 722                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 723                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 724                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 725                                 $this->summary = $request->getVal( 'preloadtitle' );
 726                         }
 727                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 728                                 $this->summary = $request->getText( 'summary' );
 729                                 if ( $this->summary !== '' ) {
 730                                         $this->hasPresetSummary = true;
 731                                 }
 732                         }
 733
 734                         if ( $request->getVal( 'minor' ) ) {
 735                                 $this->minoredit = true;
 736                         }
 737                 }
 738
 739                 $this->oldid = $request->getInt( 'oldid' );
 740
 741                 $this->bot = $request->getBool( 'bot', true );
 742                 $this->nosummary = $request->getBool( 'nosummary' );
 743
 744                 $content_handler = ContentHandler::getForTitle( $this->mTitle );
 745                 $this->contentModel = $request->getText( 'model', $content_handler->getModelID() ); #may be overridden by revision
 746                 $this->contentFormat = $request->getText( 'format', $content_handler->getDefaultFormat() ); #may be overridden by revision
 747
 748                 #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
 749                 #TODO: check if the desired content model supports the given content format!
 750
 751                 $this->live = $request->getCheck( 'live' );
 752                 $this->editintro = $request->getText( 'editintro',
 753                         // Custom edit intro for new sections
 754                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 755
 756                 // Allow extensions to modify form data
 757                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 758
 759                 wfProfileOut( __METHOD__ );
 760         }
 761
 762         /**
 763          * Subpage overridable method for extracting the page content data from the
 764          * posted form to be placed in $this->textbox1, if using customized input
 765          * this method should be overrided and return the page text that will be used
 766          * for saving, preview parsing and so on...
 767          *
 768          * @param $request WebRequest
 769          */
 770         protected function importContentFormData( &$request ) {
 771                 return; // Don't do anything, EditPage already extracted wpTextbox1
 772         }
 773
 774         /**
 775          * Initialise form fields in the object
 776          * Called on the first invocation, e.g. when a user clicks an edit link
 777          * @return bool -- if the requested section is valid
 778          */
 779         function initialiseForm() {
 780                 global $wgUser;
 781                 $this->edittime = $this->mArticle->getTimestamp();
 782
 783                 $content = $this->getContentObject( false ); #TODO: track content object?!
 784                 if ( $content === false ) {
 785                         return false;
 786                 }
 787                 $this->textbox1 = $this->toEditText( $content );
 788
 789                 // activate checkboxes if user wants them to be always active
 790                 # Sort out the "watch" checkbox
 791                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 792                         # Watch all edits
 793                         $this->watchthis = true;
 794                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 795                         # Watch creations
 796                         $this->watchthis = true;
 797                 } elseif ( $wgUser->isWatched( $this->mTitle ) ) {
 798                         # Already watched
 799                         $this->watchthis = true;
 800                 }
 801                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 802                         $this->minoredit = true;
 803                 }
 804                 if ( $this->textbox1 === false ) {
 805                         return false;
 806                 }
 807                 wfProxyCheck();
 808                 return true;
 809         }
 810
 811         /**
 812          * Fetch initial editing page content.
 813          *
 814          * @param $def_text string|bool
 815          * @return mixed string on success, $def_text for invalid sections
 816          * @private
 817          * @deprecated since 1.21, get WikiPage::getContent() instead.
 818          */
 819         function getContent( $def_text = false ) {
 820                 ContentHandler::deprecated( __METHOD__, '1.21' );
 821
 822                 if ( $def_text !== null && $def_text !== false && $def_text !== '' ) {
 823                         $def_content = $this->toEditContent( $def_text );
 824                 } else {
 825                         $def_content = false;
 826                 }
 827
 828                 $content = $this->getContentObject( $def_content );
 829
 830                 // Note: EditPage should only be used with text based content anyway.
 831                 return $this->toEditText( $content );
 832         }
 833
 834         /**
 835          * @param Content|null $def_content The default value to return
 836          *
 837          * @return mixed Content on success, $def_content for invalid sections
 838          *
 839          * @since 1.21
 840          */
 841         protected function getContentObject( $def_content = null ) {
 842                 global $wgOut, $wgRequest;
 843
 844                 wfProfileIn( __METHOD__ );
 845
 846                 $content = false;
 847
 848                 // For message page not locally set, use the i18n message.
 849                 // For other non-existent articles, use preload text if any.
 850                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
 851                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
 852                                 # If this is a system message, get the default text.
 853                                 $msg = $this->mTitle->getDefaultMessageText();
 854
 855                                 $content = $this->toEditContent( $msg );
 856                         }
 857                         if ( $content === false ) {
 858                                 # If requested, preload some text.
 859                                 $preload = $wgRequest->getVal( 'preload',
 860                                         // Custom preload text for new sections
 861                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 862
 863                                 $content = $this->getPreloadedContent( $preload );
 864                         }
 865                 // For existing pages, get text based on "undo" or section parameters.
 866                 } else {
 867                         if ( $this->section != '' ) {
 868                                 // Get section edit text (returns $def_text for invalid sections)
 869                                 $orig = $this->getOriginalContent();
 870                                 $content = $orig ? $orig->getSection( $this->section ) : null;
 871
 872                                 if ( !$content ) $content = $def_content;
 873                         } else {
 874                                 $undoafter = $wgRequest->getInt( 'undoafter' );
 875                                 $undo = $wgRequest->getInt( 'undo' );
 876
 877                                 if ( $undo > 0 && $undoafter > 0 ) {
 878                                         if ( $undo < $undoafter ) {
 879                                                 # If they got undoafter and undo round the wrong way, switch them
 880                                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 881                                         }
 882
 883                                         $undorev = Revision::newFromId( $undo );
 884                                         $oldrev = Revision::newFromId( $undoafter );
 885
 886                                         # Sanity check, make sure it's the right page,
 887                                         # the revisions exist and they were not deleted.
 888                                         # Otherwise, $content will be left as-is.
 889                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 890                                                 $undorev->getPage() == $oldrev->getPage() &&
 891                                                 $undorev->getPage() == $this->mTitle->getArticleID() &&
 892                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 893                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 894
 895                                                 $content = $this->mArticle->getUndoContent( $undorev, $oldrev );
 896
 897                                                 if ( $content === false ) {
 898                                                         # Warn the user that something went wrong
 899                                                         $undoMsg = 'failure';
 900                                                 } else {
 901                                                         # Inform the user of our success and set an automatic edit summary
 902                                                         $undoMsg = 'success';
 903
 904                                                         # If we just undid one rev, use an autosummary
 905                                                         $firstrev = $oldrev->getNext();
 906                                                         if ( $firstrev && $firstrev->getId() == $undo ) {
 907                                                                 $undoSummary = wfMessage( 'undo-summary', $undo, $undorev->getUserText() )->inContentLanguage()->text();
 908                                                                 if ( $this->summary === '' ) {
 909                                                                         $this->summary = $undoSummary;
 910                                                                 } else {
 911                                                                         $this->summary = $undoSummary . wfMessage( 'colon-separator' )
 912                                                                                 ->inContentLanguage()->text() . $this->summary;
 913                                                                 }
 914                                                                 $this->undidRev = $undo;
 915                                                         }
 916                                                         $this->formtype = 'diff';
 917                                                 }
 918                                         } else {
 919                                                 // Failed basic sanity checks.
 920                                                 // Older revisions may have been removed since the link
 921                                                 // was created, or we may simply have got bogus input.
 922                                                 $undoMsg = 'norev';
 923                                         }
 924
 925                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
 926                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
 927                                                 wfMessage( 'undo-' . $undoMsg )->plain() . '</div>', true, /* interface */true );
 928                                 }
 929
 930                                 if ( $content === false ) {
 931                                         $content = $this->getOriginalContent();
 932                                 }
 933                         }
 934                 }
 935
 936                 wfProfileOut( __METHOD__ );
 937                 return $content;
 938         }
 939
 940         /**
 941          * Get the content of the wanted revision, without section extraction.
 942          *
 943          * The result of this function can be used to compare user's input with
 944          * section replaced in its context (using WikiPage::replaceSection())
 945          * to the original text of the edit.
 946          *
 947          * This difers from Article::getContent() that when a missing revision is
 948          * encountered the result will be null and not the
 949          * 'missing-revision' message.
 950          *
 951          * @since 1.19
 952          * @return Content|null
 953          */
 954         private function getOriginalContent() {
 955                 if ( $this->section == 'new' ) {
 956                         return $this->getCurrentContent();
 957                 }
 958                 $revision = $this->mArticle->getRevisionFetched();
 959                 if ( $revision === null ) {
 960                         if ( !$this->contentModel ) $this->contentModel = $this->getTitle()->getContentModel();
 961                         $handler = ContentHandler::getForModelID( $this->contentModel );
 962
 963                         return $handler->makeEmptyContent();
 964                 }
 965                 $content = $revision->getContent();
 966                 return $content;
 967         }
 968
 969         /**
 970          * Get the current content of the page. This is basically similar to
 971          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
 972          * content object is returned instead of null.
 973          *
 974          * @since 1.21
 975          * @return Content
 976          */
 977         protected function getCurrentContent() {
 978                 $rev = $this->mArticle->getRevision();
 979                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
 980
 981                 if ( $content  === false || $content === null ) {
 982                         if ( !$this->contentModel ) $this->contentModel = $this->getTitle()->getContentModel();
 983                         $handler = ContentHandler::getForModelID( $this->contentModel );
 984
 985                         return $handler->makeEmptyContent();
 986                 } else {
 987                         # nasty side-effect, but needed for consistency
 988                         $this->contentModel = $rev->getContentModel();
 989                         $this->contentFormat = $rev->getContentFormat();
 990
 991                         return $content;
 992                 }
 993         }
 994
 995
 996         /**
 997          * Use this method before edit() to preload some text into the edit box
 998          *
 999          * @param $text string
1000          * @deprecated since 1.21, use setPreloadedContent() instead.
1001          */
1002         public function setPreloadedText( $text ) {
1003                 ContentHandler::deprecated( __METHOD__, "1.21" );
1004
1005                 $content = $this->toEditContent( $text );
1006
1007                 $this->setPreloadedContent( $content );
1008         }
1009
1010         /**
1011          * Use this method before edit() to preload some content into the edit box
1012          *
1013          * @param $content Content
1014          *
1015          * @since 1.21
1016          */
1017         public function setPreloadedContent( Content $content ) {
1018                 $this->mPreloadContent = $content;
1019         }
1020
1021         /**
1022          * Get the contents to be preloaded into the box, either set by
1023          * an earlier setPreloadText() or by loading the given page.
1024          *
1025          * @param $preload String: representing the title to preload from.
1026          *
1027          * @return String
1028          *
1029          * @deprecated since 1.21, use getPreloadedContent() instead
1030          */
1031         protected function getPreloadedText( $preload ) {
1032                 ContentHandler::deprecated( __METHOD__, "1.21" );
1033
1034                 $content = $this->getPreloadedContent( $preload );
1035                 $text = $this->toEditText( $content );
1036
1037                 return $text;
1038         }
1039
1040         /**
1041          * Get the contents to be preloaded into the box, either set by
1042          * an earlier setPreloadText() or by loading the given page.
1043          *
1044          * @param $preload String: representing the title to preload from.
1045          *
1046          * @return Content
1047          *
1048          * @since 1.21
1049          */
1050         protected function getPreloadedContent( $preload ) {
1051                 global $wgUser;
1052
1053                 if ( !empty( $this->mPreloadContent ) ) {
1054                         return $this->mPreloadContent;
1055                 }
1056
1057                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1058
1059                 if ( $preload === '' ) {
1060                         return $handler->makeEmptyContent();
1061                 }
1062
1063                 $title = Title::newFromText( $preload );
1064                 # Check for existence to avoid getting MediaWiki:Noarticletext
1065                 if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1066                         //TODO: somehow show a warning to the user!
1067                         return $handler->makeEmptyContent();
1068                 }
1069
1070                 $page = WikiPage::factory( $title );
1071                 if ( $page->isRedirect() ) {
1072                         $title = $page->getRedirectTarget();
1073                         # Same as before
1074                         if ( $title === null || !$title->exists() || !$title->userCan( 'read', $wgUser ) ) {
1075                                 //TODO: somehow show a warning to the user!
1076                                 return $handler->makeEmptyContent();
1077                         }
1078                         $page = WikiPage::factory( $title );
1079                 }
1080
1081                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1082                 $content = $page->getContent( Revision::RAW );
1083
1084                 if ( !$content ) {
1085                         //TODO: somehow show a warning to the user!
1086                         return $handler->makeEmptyContent();
1087                 }
1088
1089                 if ( $content->getModel() !== $handler->getModelID() ) {
1090                         $converted = $content->convert( $handler->getModelID() );
1091
1092                         if ( !$converted ) {
1093                                 //TODO: somehow show a warning to the user!
1094                                 wfDebug( "Attempt to preload incompatible content: "
1095                                                 . "can't convert " . $content->getModel()
1096                                                 . " to " . $handler->getModelID() );
1097
1098                                 return $handler->makeEmptyContent();
1099                         }
1100
1101                         $content = $converted;
1102                 }
1103
1104                 return $content->preloadTransform( $title, $parserOptions );
1105         }
1106
1107         /**
1108          * Make sure the form isn't faking a user's credentials.
1109          *
1110          * @param $request WebRequest
1111          * @return bool
1112          * @private
1113          */
1114         function tokenOk( &$request ) {
1115                 global $wgUser;
1116                 $token = $request->getVal( 'wpEditToken' );
1117                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1118                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1119                 return $this->mTokenOk;
1120         }
1121
1122         /**
1123          * Attempt submission
1124          * @throws UserBlockedError|ReadOnlyError|ThrottledError|PermissionsError
1125          * @return bool false if output is done, true if the rest of the form should be displayed
1126          */
1127         function attemptSave() {
1128                 global $wgUser, $wgOut;
1129
1130                 $resultDetails = false;
1131                 # Allow bots to exempt some edits from bot flagging
1132                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1133                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1134                 // FIXME: once the interface for internalAttemptSave() is made nicer, this should use the message in $status
1135                 if ( $status->value == self::AS_SUCCESS_UPDATE || $status->value == self::AS_SUCCESS_NEW_ARTICLE ) {
1136                         $this->didSave = true;
1137                 }
1138
1139                 switch ( $status->value ) {
1140                         case self::AS_HOOK_ERROR_EXPECTED:
1141                         case self::AS_CONTENT_TOO_BIG:
1142                         case self::AS_ARTICLE_WAS_DELETED:
1143                         case self::AS_CONFLICT_DETECTED:
1144                         case self::AS_SUMMARY_NEEDED:
1145                         case self::AS_TEXTBOX_EMPTY:
1146                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1147                         case self::AS_END:
1148                                 return true;
1149
1150                         case self::AS_HOOK_ERROR:
1151                                 return false;
1152
1153                         case self::AS_PARSE_ERROR:
1154                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>');
1155                                 return true;
1156
1157                         case self::AS_SUCCESS_NEW_ARTICLE:
1158                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1159                                 $anchor = isset ( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1160                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1161                                 return false;
1162
1163                         case self::AS_SUCCESS_UPDATE:
1164                                 $extraQuery = '';
1165                                 $sectionanchor = $resultDetails['sectionanchor'];
1166
1167                                 // Give extensions a chance to modify URL query on update
1168                                 wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this->mArticle, &$sectionanchor, &$extraQuery ) );
1169
1170                                 if ( $resultDetails['redirect'] ) {
1171                                         if ( $extraQuery == '' ) {
1172                                                 $extraQuery = 'redirect=no';
1173                                         } else {
1174                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1175                                         }
1176                                 }
1177                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1178                                 return false;
1179
1180                         case self::AS_BLANK_ARTICLE:
1181                                 $wgOut->redirect( $this->getContextTitle()->getFullURL() );
1182                                 return false;
1183
1184                         case self::AS_SPAM_ERROR:
1185                                 $this->spamPageWithContent( $resultDetails['spam'] );
1186                                 return false;
1187
1188                         case self::AS_BLOCKED_PAGE_FOR_USER:
1189                                 throw new UserBlockedError( $wgUser->getBlock() );
1190
1191                         case self::AS_IMAGE_REDIRECT_ANON:
1192                         case self::AS_IMAGE_REDIRECT_LOGGED:
1193                                 throw new PermissionsError( 'upload' );
1194
1195                         case self::AS_READ_ONLY_PAGE_ANON:
1196                         case self::AS_READ_ONLY_PAGE_LOGGED:
1197                                 throw new PermissionsError( 'edit' );
1198
1199                         case self::AS_READ_ONLY_PAGE:
1200                                 throw new ReadOnlyError;
1201
1202                         case self::AS_RATE_LIMITED:
1203                                 throw new ThrottledError();
1204
1205                         case self::AS_NO_CREATE_PERMISSION:
1206                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1207                                 throw new PermissionsError( $permission );
1208
1209                         default:
1210                                 // We don't recognize $status->value. The only way that can happen
1211                                 // is if an extension hook aborted from inside ArticleSave.
1212                                 // Render the status object into $this->hookError
1213                                 // FIXME this sucks, we should just use the Status object throughout
1214                                 $this->hookError = '<div class="error">' . $status->getWikitext() .
1215                                         '</div>';
1216                                 return true;
1217                 }
1218         }
1219
1220         /**
1221          * Attempt submission (no UI)
1222          *
1223          * @param $result
1224          * @param $bot bool
1225          *
1226          * @return Status object, possibly with a message, but always with one of the AS_* constants in $status->value,
1227          *
1228          * FIXME: This interface is TERRIBLE, but hard to get rid of due to various error display idiosyncrasies. There are
1229          * also lots of cases where error metadata is set in the object and retrieved later instead of being returned, e.g.
1230          * AS_CONTENT_TOO_BIG and AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some time.
1231          */
1232         function internalAttemptSave( &$result, $bot = false ) {
1233                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1234
1235                 $status = Status::newGood();
1236
1237                 wfProfileIn( __METHOD__  );
1238                 wfProfileIn( __METHOD__ . '-checks' );
1239
1240                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
1241                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1242                         $status->fatal( 'hookaborted' );
1243                         $status->value = self::AS_HOOK_ERROR;
1244                         wfProfileOut( __METHOD__ . '-checks' );
1245                         wfProfileOut( __METHOD__  );
1246                         return $status;
1247                 }
1248
1249                 try {
1250                         # Construct Content object
1251                         $textbox_content = $this->toEditContent( $this->textbox1 );
1252                 } catch (MWContentSerializationException $ex) {
1253                         $status->fatal( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
1254                         $status->value = self::AS_PARSE_ERROR;
1255                         wfProfileOut( __METHOD__ );
1256                         return $status;
1257                 }
1258
1259                 # Check image redirect
1260                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1261                         $textbox_content->isRedirect() &&
1262                         !$wgUser->isAllowed( 'upload' ) ) {
1263                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1264                                 $status->setResult( false, $code );
1265
1266                                 wfProfileOut( __METHOD__ . '-checks' );
1267                                 wfProfileOut( __METHOD__  );
1268
1269                                 return $status;
1270                 }
1271
1272                 # Check for spam
1273                 $match = self::matchSummarySpamRegex( $this->summary );
1274                 if ( $match === false ) {
1275                         $match = self::matchSpamRegex( $this->textbox1 );
1276                 }
1277                 if ( $match !== false ) {
1278                         $result['spam'] = $match;
1279                         $ip = $wgRequest->getIP();
1280                         $pdbk = $this->mTitle->getPrefixedDBkey();
1281                         $match = str_replace( "\n", '', $match );
1282                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1283                         $status->fatal( 'spamprotectionmatch', $match );
1284                         $status->value = self::AS_SPAM_ERROR;
1285                         wfProfileOut( __METHOD__ . '-checks' );
1286                         wfProfileOut( __METHOD__ );
1287                         return $status;
1288                 }
1289                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
1290                         # Error messages etc. could be handled within the hook...
1291                         $status->fatal( 'hookaborted' );
1292                         $status->value = self::AS_HOOK_ERROR;
1293                         wfProfileOut( __METHOD__ . '-checks' );
1294                         wfProfileOut( __METHOD__ );
1295                         return $status;
1296                 } elseif ( $this->hookError != '' ) {
1297                         # ...or the hook could be expecting us to produce an error
1298                         $status->fatal( 'hookaborted' );
1299                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1300                         wfProfileOut( __METHOD__ . '-checks' );
1301                         wfProfileOut( __METHOD__ );
1302                         return $status;
1303                 }
1304
1305                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1306                         // Auto-block user's IP if the account was "hard" blocked
1307                         $wgUser->spreadAnyEditBlock();
1308                         # Check block state against master, thus 'false'.
1309                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1310                         wfProfileOut( __METHOD__ . '-checks' );
1311                         wfProfileOut( __METHOD__ );
1312                         return $status;
1313                 }
1314
1315                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1316                 if ( $this->kblength > $wgMaxArticleSize ) {
1317                         // Error will be displayed by showEditForm()
1318                         $this->tooBig = true;
1319                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1320                         wfProfileOut( __METHOD__ . '-checks' );
1321                         wfProfileOut( __METHOD__ );
1322                         return $status;
1323                 }
1324
1325                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1326                         if ( $wgUser->isAnon() ) {
1327                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1328                                 wfProfileOut( __METHOD__ . '-checks' );
1329                                 wfProfileOut( __METHOD__ );
1330                                 return $status;
1331                         } else {
1332                                 $status->fatal( 'readonlytext' );
1333                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1334                                 wfProfileOut( __METHOD__ . '-checks' );
1335                                 wfProfileOut( __METHOD__ );
1336                                 return $status;
1337                         }
1338                 }
1339
1340                 if ( wfReadOnly() ) {
1341                         $status->fatal( 'readonlytext' );
1342                         $status->value = self::AS_READ_ONLY_PAGE;
1343                         wfProfileOut( __METHOD__ . '-checks' );
1344                         wfProfileOut( __METHOD__ );
1345                         return $status;
1346                 }
1347                 if ( $wgUser->pingLimiter() ) {
1348                         $status->fatal( 'actionthrottledtext' );
1349                         $status->value = self::AS_RATE_LIMITED;
1350                         wfProfileOut( __METHOD__ . '-checks' );
1351                         wfProfileOut( __METHOD__ );
1352                         return $status;
1353                 }
1354
1355                 # If the article has been deleted while editing, don't save it without
1356                 # confirmation
1357                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1358                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1359                         wfProfileOut( __METHOD__ . '-checks' );
1360                         wfProfileOut( __METHOD__ );
1361                         return $status;
1362                 }
1363
1364                 wfProfileOut( __METHOD__ . '-checks' );
1365
1366                 # Load the page data from the master. If anything changes in the meantime,
1367                 # we detect it by using page_latest like a token in a 1 try compare-and-swap.
1368                 $this->mArticle->loadPageData( 'fromdbmaster' );
1369                 $new = !$this->mArticle->exists();
1370
1371                 if ( $new ) {
1372                         // Late check for create permission, just in case *PARANOIA*
1373                         if ( !$this->mTitle->userCan( 'create', $wgUser ) ) {
1374                                 $status->fatal( 'nocreatetext' );
1375                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1376                                 wfDebug( __METHOD__ . ": no create permission\n" );
1377                                 wfProfileOut( __METHOD__ );
1378                                 return $status;
1379                         }
1380
1381                         # Don't save a new article if it's blank.
1382                         if ( $this->textbox1 == '' ) {
1383                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1384                                 wfProfileOut( __METHOD__ );
1385                                 return $status;
1386                         }
1387
1388                         // Run post-section-merge edit filter
1389                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
1390                                 # Error messages etc. could be handled within the hook...
1391                                 $status->fatal( 'hookaborted' );
1392                                 $status->value = self::AS_HOOK_ERROR;
1393                                 wfProfileOut( __METHOD__ );
1394                                 return $status;
1395                         } elseif ( $this->hookError != '' ) {
1396                                 # ...or the hook could be expecting us to produce an error
1397                                 $status->fatal( 'hookaborted' );
1398                                 $status->value = self::AS_HOOK_ERROR_EXPECTED;
1399                                 wfProfileOut( __METHOD__ );
1400                                 return $status;
1401                         }
1402
1403                         $content = $textbox_content;
1404
1405                         $result['sectionanchor'] = '';
1406                         if ( $this->section == 'new' ) {
1407                                 if ( $this->sectiontitle !== '' ) {
1408                                         // Insert the section title above the content.
1409                                         $content = $content->addSectionHeader( $this->sectiontitle );
1410
1411                                         // Jump to the new section
1412                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1413
1414                                         // If no edit summary was specified, create one automatically from the section
1415                                         // title and have it link to the new section. Otherwise, respect the summary as
1416                                         // passed.
1417                                         if ( $this->summary === '' ) {
1418                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1419                                                 $this->summary = wfMessage( 'newsectionsummary' )
1420                                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1421                                         }
1422                                 } elseif ( $this->summary !== '' ) {
1423                                         // Insert the section title above the content.
1424                                         $content = $content->addSectionHeader( $this->summary );
1425
1426                                         // Jump to the new section
1427                                         $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1428
1429                                         // Create a link to the new section from the edit summary.
1430                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1431                                         $this->summary = wfMessage( 'newsectionsummary' )
1432                                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1433                                 }
1434                         }
1435
1436                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1437
1438                 } else { # not $new
1439
1440                         # Article exists. Check for edit conflict.
1441
1442                         $this->mArticle->clear(); # Force reload of dates, etc.
1443                         $timestamp = $this->mArticle->getTimestamp();
1444
1445                         wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1446
1447                         if ( $timestamp != $this->edittime ) {
1448                                 $this->isConflict = true;
1449                                 if ( $this->section == 'new' ) {
1450                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1451                                                 $this->mArticle->getComment() == $this->summary ) {
1452                                                 // Probably a duplicate submission of a new comment.
1453                                                 // This can happen when squid resends a request after
1454                                                 // a timeout but the first one actually went through.
1455                                                 wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
1456                                         } else {
1457                                                 // New comment; suppress conflict.
1458                                                 $this->isConflict = false;
1459                                                 wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1460                                         }
1461                                 } elseif ( $this->section == '' && Revision::userWasLastToEdit( DB_MASTER,  $this->mTitle->getArticleID(),
1462                                                         $wgUser->getId(), $this->edittime ) ) {
1463                                         # Suppress edit conflict with self, except for section edits where merging is required.
1464                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1465                                         $this->isConflict = false;
1466                                 }
1467                         }
1468
1469                         // If sectiontitle is set, use it, otherwise use the summary as the section title (for
1470                         // backwards compatibility with old forms/bots).
1471                         if ( $this->sectiontitle !== '' ) {
1472                                 $sectionTitle = $this->sectiontitle;
1473                         } else {
1474                                 $sectionTitle = $this->summary;
1475                         }
1476
1477                         $content = null;
1478
1479                         if ( $this->isConflict ) {
1480                                 wfDebug( __METHOD__ . ": conflict! getting section '{$this->section}' for time '{$this->edittime}'"
1481                                                 . " (article time '{$timestamp}')\n" );
1482
1483                                 $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle, $this->edittime );
1484                         } else {
1485                                 wfDebug( __METHOD__ . ": getting section '{$this->section}'\n" );
1486                                 $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle );
1487                         }
1488
1489                         if ( is_null( $content ) ) {
1490                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1491                                 $this->isConflict = true;
1492                                 $content = $textbox_content; // do not try to merge here!
1493                         } elseif ( $this->isConflict ) {
1494                                 # Attempt merge
1495                                 if ( $this->mergeChangesIntoContent( $content ) ) {
1496                                         // Successful merge! Maybe we should tell the user the good news?
1497                                         $this->isConflict = false;
1498                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1499                                 } else {
1500                                         $this->section = '';
1501                                         $this->textbox1 = ContentHandler::getContentText( $content );
1502                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1503                                 }
1504                         }
1505
1506                         if ( $this->isConflict ) {
1507                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1508                                 wfProfileOut( __METHOD__ );
1509                                 return $status;
1510                         }
1511
1512                         // Run post-section-merge edit filter
1513                         $hook_args = array( $this, $content, &$this->hookError, $this->summary );
1514
1515                         if ( !ContentHandler::runLegacyHooks( 'EditFilterMerged', $hook_args )
1516                                 || !wfRunHooks( 'EditFilterMergedContent', $hook_args ) ) {
1517                                 # Error messages etc. could be handled within the hook...
1518                                 $status->fatal( 'hookaborted' );
1519                                 $status->value = self::AS_HOOK_ERROR;
1520                                 wfProfileOut( __METHOD__ );
1521                                 return $status;
1522                         } elseif ( $this->hookError != '' ) {
1523                                 # ...or the hook could be expecting us to produce an error
1524                                 $status->fatal( 'hookaborted' );
1525                                 $status->value = self::AS_HOOK_ERROR_EXPECTED;
1526                                 wfProfileOut( __METHOD__ );
1527                                 return $status;
1528                         }
1529
1530                         # Handle the user preference to force summaries here, but not for null edits
1531                         if ( $this->section != 'new' && !$this->allowBlankSummary
1532                                 && !$content->equals( $this->getOriginalContent() )
1533                                 && !$content->isRedirect() ) # check if it's not a redirect
1534                         {
1535                                 if ( md5( $this->summary ) == $this->autoSumm ) {
1536                                         $this->missingSummary = true;
1537                                         $status->fatal( 'missingsummary' );
1538                                         $status->value = self::AS_SUMMARY_NEEDED;
1539                                         wfProfileOut( __METHOD__ );
1540                                         return $status;
1541                                 }
1542                         }
1543
1544                         # And a similar thing for new sections
1545                         if ( $this->section == 'new' && !$this->allowBlankSummary ) {
1546                                 if ( trim( $this->summary ) == '' ) {
1547                                         $this->missingSummary = true;
1548                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1549                                         $status->value = self::AS_SUMMARY_NEEDED;
1550                                         wfProfileOut( __METHOD__ );
1551                                         return $status;
1552                                 }
1553                         }
1554
1555                         # All's well
1556                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1557                         $sectionanchor = '';
1558                         if ( $this->section == 'new' ) {
1559                                 if ( $this->textbox1 == '' ) {
1560                                         $this->missingComment = true;
1561                                         $status->fatal( 'missingcommenttext' );
1562                                         $status->value = self::AS_TEXTBOX_EMPTY;
1563                                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1564                                         wfProfileOut( __METHOD__ );
1565                                         return $status;
1566                                 }
1567                                 if ( $this->sectiontitle !== '' ) {
1568                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1569                                         // If no edit summary was specified, create one automatically from the section
1570                                         // title and have it link to the new section. Otherwise, respect the summary as
1571                                         // passed.
1572                                         if ( $this->summary === '' ) {
1573                                                 $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1574                                                 $this->summary = wfMessage( 'newsectionsummary' )
1575                                                         ->rawParams( $cleanSectionTitle )->inContentLanguage()->text();
1576                                         }
1577                                 } elseif ( $this->summary !== '' ) {
1578                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1579                                         # This is a new section, so create a link to the new section
1580                                         # in the revision summary.
1581                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1582                                         $this->summary = wfMessage( 'newsectionsummary' )
1583                                                 ->rawParams( $cleanSummary )->inContentLanguage()->text();
1584                                 }
1585                         } elseif ( $this->section != '' ) {
1586                                 # Try to get a section anchor from the section source, redirect to edited section if header found
1587                                 # XXX: might be better to integrate this into Article::replaceSection
1588                                 # for duplicate heading checking and maybe parsing
1589                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1590                                 # we can't deal with anchors, includes, html etc in the header for now,
1591                                 # headline would need to be parsed to improve this
1592                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1593                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1594                                 }
1595                         }
1596                         $result['sectionanchor'] = $sectionanchor;
1597                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1598
1599                         // Save errors may fall down to the edit form, but we've now
1600                         // merged the section into full text. Clear the section field
1601                         // so that later submission of conflict forms won't try to
1602                         // replace that into a duplicated mess.
1603                         $this->textbox1 = $this->toEditText( $content );
1604                         $this->section = '';
1605
1606                         $status->value = self::AS_SUCCESS_UPDATE;
1607                 }
1608
1609                 // Check for length errors again now that the section is merged in
1610                         $this->kblength = (int)( strlen( $this->toEditText( $content ) ) / 1024 );
1611                 if ( $this->kblength > $wgMaxArticleSize ) {
1612                         $this->tooBig = true;
1613                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1614                         wfProfileOut( __METHOD__ );
1615                         return $status;
1616                 }
1617
1618                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1619                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1620                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1621                         ( $bot ? EDIT_FORCE_BOT : 0 );
1622
1623                         $doEditStatus = $this->mArticle->doEditContent( $content, $this->summary, $flags,
1624                                                                                                                         false, null, $this->contentFormat );
1625
1626                 if ( $doEditStatus->isOK() ) {
1627                                 $result['redirect'] = $content->isRedirect();
1628                         $this->updateWatchlist();
1629                         wfProfileOut( __METHOD__ );
1630                         return $status;
1631                 } else {
1632                         // Failure from doEdit()
1633                         // Show the edit conflict page for certain recognized errors from doEdit(),
1634                         // but don't show it for errors from extension hooks
1635                         $errors = $doEditStatus->getErrorsArray();
1636                         if ( in_array( $errors[0][0], array( 'edit-gone-missing', 'edit-conflict',
1637                                 'edit-already-exists' ) ) )
1638                         {
1639                                 $this->isConflict = true;
1640                                 // Destroys data doEdit() put in $status->value but who cares
1641                                 $doEditStatus->value = self::AS_END;
1642                         }
1643                         wfProfileOut( __METHOD__ );
1644                         return $doEditStatus;
1645                 }
1646         }
1647
1648         /**
1649          * Register the change of watch status
1650          */
1651         protected function updateWatchlist() {
1652                 global $wgUser;
1653
1654                 if ( $wgUser->isLoggedIn() && $this->watchthis != $wgUser->isWatched( $this->mTitle ) ) {
1655                         $fname = __METHOD__;
1656                         $title = $this->mTitle;
1657                         $watch = $this->watchthis;
1658
1659                         // Do this in its own transaction to reduce contention...
1660                         $dbw = wfGetDB( DB_MASTER );
1661                         $dbw->onTransactionIdle( function() use ( $dbw, $title, $watch, $wgUser, $fname ) {
1662                                 $dbw->begin( $fname );
1663                                 if ( $watch ) {
1664                                         WatchAction::doWatch( $title, $wgUser );
1665                                 } else {
1666                                         WatchAction::doUnwatch( $title, $wgUser );
1667                                 }
1668                                 $dbw->commit( $fname );
1669                         } );
1670                 }
1671         }
1672
1673         /**
1674          * @private
1675          * @todo document
1676          *
1677          * @param $editText string
1678          *
1679          * @return bool
1680          * @deprecated since 1.21, use mergeChangesIntoContent() instead
1681          */
1682         function mergeChangesInto( &$editText ){
1683                 ContentHandler::deprecated( __METHOD__, "1.21" );
1684
1685                 $editContent = $this->toEditContent( $editText );
1686
1687                 $ok = $this->mergeChangesIntoContent( $editContent );
1688
1689                 if ( $ok ) {
1690                         $editText = $this->toEditText( $editContent );
1691                         return true;
1692                 }
1693                 return false;
1694         }
1695
1696         /**
1697          * @private
1698          * @todo document
1699          *
1700          * @param $editContent
1701          * @return bool
1702          * @since since 1.WD
1703          */
1704         private function mergeChangesIntoContent( &$editContent ){
1705                 wfProfileIn( __METHOD__ );
1706
1707                 $db = wfGetDB( DB_MASTER );
1708
1709                 // This is the revision the editor started from
1710                 $baseRevision = $this->getBaseRevision();
1711                 $baseContent = $baseRevision ? $baseRevision->getContent() : null;
1712
1713                 if ( is_null( $baseContent ) ) {
1714                         wfProfileOut( __METHOD__ );
1715                         return false;
1716                 }
1717
1718                 // The current state, we want to merge updates into it
1719                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1720                 $currentContent = $currentRevision ? $currentRevision->getContent() : null;
1721
1722                 if ( is_null( $currentContent ) ) {
1723                         wfProfileOut( __METHOD__ );
1724                         return false;
1725                 }
1726
1727                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
1728
1729                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
1730
1731                 if ( $result ) {
1732                         $editContent = $result;
1733                         wfProfileOut( __METHOD__ );
1734                         return true;
1735                 } else {
1736                         wfProfileOut( __METHOD__ );
1737                         return false;
1738                 }
1739         }
1740
1741         /**
1742          * @return Revision
1743          */
1744         function getBaseRevision() {
1745                 if ( !$this->mBaseRevision ) {
1746                         $db = wfGetDB( DB_MASTER );
1747                         $baseRevision = Revision::loadFromTimestamp(
1748                                 $db, $this->mTitle, $this->edittime );
1749                         return $this->mBaseRevision = $baseRevision;
1750                 } else {
1751                         return $this->mBaseRevision;
1752                 }
1753         }
1754
1755         /**
1756          * Check given input text against $wgSpamRegex, and return the text of the first match.
1757          *
1758          * @param $text string
1759          *
1760          * @return string|bool matching string or false
1761          */
1762         public static function matchSpamRegex( $text ) {
1763                 global $wgSpamRegex;
1764                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1765                 $regexes = (array)$wgSpamRegex;
1766                 return self::matchSpamRegexInternal( $text, $regexes );
1767         }
1768
1769         /**
1770          * Check given input text against $wgSpamRegex, and return the text of the first match.
1771          *
1772          * @param $text string
1773          *
1774          * @return string|bool  matching string or false
1775          */
1776         public static function matchSummarySpamRegex( $text ) {
1777                 global $wgSummarySpamRegex;
1778                 $regexes = (array)$wgSummarySpamRegex;
1779                 return self::matchSpamRegexInternal( $text, $regexes );
1780         }
1781
1782         /**
1783          * @param $text string
1784          * @param $regexes array
1785          * @return bool|string
1786          */
1787         protected static function matchSpamRegexInternal( $text, $regexes ) {
1788                 foreach ( $regexes as $regex ) {
1789                         $matches = array();
1790                         if ( preg_match( $regex, $text, $matches ) ) {
1791                                 return $matches[0];
1792                         }
1793                 }
1794                 return false;
1795         }
1796
1797         function setHeaders() {
1798                 global $wgOut, $wgUser;
1799
1800                 $wgOut->addModules( 'mediawiki.action.edit' );
1801
1802                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
1803                         $wgOut->addModules( 'mediawiki.action.edit.preview' );
1804                 }
1805                 // Bug #19334: textarea jumps when editing articles in IE8
1806                 $wgOut->addStyle( 'common/IE80Fixes.css', 'screen', 'IE 8' );
1807
1808                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1809
1810                 # Enabled article-related sidebar, toplinks, etc.
1811                 $wgOut->setArticleRelated( true );
1812
1813                 $contextTitle = $this->getContextTitle();
1814                 if ( $this->isConflict ) {
1815                         $msg = 'editconflict';
1816                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
1817                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1818                 } else {
1819                         $msg = $contextTitle->exists() || ( $contextTitle->getNamespace() == NS_MEDIAWIKI && $contextTitle->getDefaultMessageText() !== false ) ?
1820                                 'editing' : 'creating';
1821                 }
1822                 # Use the title defined by DISPLAYTITLE magic word when present
1823                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
1824                 if ( $displayTitle === false ) {
1825                         $displayTitle = $contextTitle->getPrefixedText();
1826                 }
1827                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
1828         }
1829
1830         /**
1831          * Show all applicable editing introductions
1832          */
1833         protected function showIntro() {
1834                 global $wgOut, $wgUser;
1835                 if ( $this->suppressIntro ) {
1836                         return;
1837                 }
1838
1839                 $namespace = $this->mTitle->getNamespace();
1840
1841                 if ( $namespace == NS_MEDIAWIKI ) {
1842                         # Show a warning if editing an interface message
1843                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
1844                 } else if( $namespace == NS_FILE ) {
1845                         # Show a hint to shared repo
1846                         $file = wfFindFile( $this->mTitle );
1847                         if( $file && !$file->isLocal() ) {
1848                                 $descUrl = $file->getDescriptionUrl();
1849                                 # there must be a description url to show a hint to shared repo
1850                                 if( $descUrl ) {
1851                                         if( !$this->mTitle->exists() ) {
1852                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array (
1853                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
1854                                                 ) );
1855                                         } else {
1856                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
1857                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
1858                                                 ) );
1859                                         }
1860                                 }
1861                         }
1862                 }
1863
1864                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
1865                 # Show log extract when the user is currently blocked
1866                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
1867                         $parts = explode( '/', $this->mTitle->getText(), 2 );
1868                         $username = $parts[0];
1869                         $user = User::newFromName( $username, false /* allow IP users*/ );
1870                         $ip = User::isIP( $username );
1871                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
1872                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
1873                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
1874                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
1875                                 LogEventsList::showLogExtract(
1876                                         $wgOut,
1877                                         'block',
1878                                         $user->getUserPage(),
1879                                         '',
1880                                         array(
1881                                                 'lim' => 1,
1882                                                 'showIfEmpty' => false,
1883                                                 'msgKey' => array(
1884                                                         'blocked-notice-logextract',
1885                                                         $user->getName() # Support GENDER in notice
1886                                                 )
1887                                         )
1888                                 );
1889                         }
1890                 }
1891                 # Try to add a custom edit intro, or use the standard one if this is not possible.
1892                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
1893                         if ( $wgUser->isLoggedIn() ) {
1894                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1\n</div>", 'newarticletext' );
1895                         } else {
1896                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1\n</div>", 'newarticletextanon' );
1897                         }
1898                 }
1899                 # Give a notice if the user is editing a deleted/moved page...
1900                 if ( !$this->mTitle->exists() ) {
1901                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
1902                                 '',
1903                                 array(
1904                                         'lim' => 10,
1905                                         'conds' => array( "log_action != 'revision'" ),
1906                                         'showIfEmpty' => false,
1907                                         'msgKey' => array( 'recreate-moveddeleted-warn' )
1908                                 )
1909                         );
1910                 }
1911         }
1912
1913         /**
1914          * Attempt to show a custom editing introduction, if supplied
1915          *
1916          * @return bool
1917          */
1918         protected function showCustomIntro() {
1919                 if ( $this->editintro ) {
1920                         $title = Title::newFromText( $this->editintro );
1921                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
1922                                 global $wgOut;
1923                                 // Added using template syntax, to take <noinclude>'s into account.
1924                                 $wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
1925                                 return true;
1926                         }
1927                 }
1928                 return false;
1929         }
1930
1931         /**
1932          * Gets an editable textual representation of $content.
1933          * The textual representation can be turned by into a Content object by the
1934          * toEditContent() method.
1935          *
1936          * If $content is null or false or a string, $content is returned unchanged.
1937          *
1938          * If the given Content object is not of a type that can be edited using the text base EditPage,
1939          * an exception will be raised. Set $this->allowNonTextContent to true to allow editing of non-textual
1940          * content.
1941          *
1942          * @param Content|null|bool|string $content
1943          * @return String the editable text form of the content.
1944          *
1945          * @throws MWException if $content is not an instance of TextContent and $this->allowNonTextContent is not true.
1946          */
1947         protected function toEditText( $content ) {
1948                 if ( $content === null || $content === false ) {
1949                         return $content;
1950                 }
1951
1952                 if ( is_string( $content ) ) {
1953                         return $content;
1954                 }
1955
1956                 if ( !$this->allowNonTextContent && !( $content instanceof TextContent ) ) {
1957                         throw new MWException( "This content model can not be edited as text: "
1958                                                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
1959                 }
1960
1961                 return $content->serialize( $this->contentFormat );
1962         }
1963
1964         /**
1965          * Turns the given text into a Content object by unserializing it.
1966          *
1967          * If the resulting Content object is not of a type that can be edited using the text base EditPage,
1968          * an exception will be raised. Set $this->allowNonTextContent to true to allow editing of non-textual
1969          * content.
1970          *
1971          * @param String|null|bool $text Text to unserialize
1972          * @return Content The content object created from $text. If $text was false or null, false resp. null will be
1973          *                 returned instead.
1974          *
1975          * @throws MWException if unserializing the text results in a Content object that is not an instance of TextContent
1976          *          and $this->allowNonTextContent is not true.
1977          */
1978         protected function toEditContent( $text ) {
1979                 if ( $text === false || $text === null ) {
1980                         return $text;
1981                 }
1982
1983                 $content = ContentHandler::makeContent( $text, $this->getTitle(),
1984                         $this->contentModel, $this->contentFormat );
1985
1986                 if ( !$this->allowNonTextContent && !( $content instanceof TextContent ) ) {
1987                         throw new MWException( "This content model can not be edited as text: "
1988                                 . ContentHandler::getLocalizedName( $content->getModel() ) );
1989                 }
1990
1991                 return $content;
1992         }
1993
1994         /**
1995          * Send the edit form and related headers to $wgOut
1996          * @param $formCallback Callback|null that takes an OutputPage parameter; will be called
1997          *     during form output near the top, for captchas and the like.
1998          */
1999         function showEditForm( $formCallback = null ) {
2000                 global $wgOut, $wgUser;
2001
2002                 wfProfileIn( __METHOD__ );
2003
2004                 # need to parse the preview early so that we know which templates are used,
2005                 # otherwise users with "show preview after edit box" will get a blank list
2006                 # we parse this near the beginning so that setHeaders can do the title
2007                 # setting work instead of leaving it in getPreviewText
2008                 $previewOutput = '';
2009                 if ( $this->formtype == 'preview' ) {
2010                         $previewOutput = $this->getPreviewText();
2011                 }
2012
2013                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
2014
2015                 $this->setHeaders();
2016
2017                 if ( $this->showHeader() === false ) {
2018                         wfProfileOut( __METHOD__ );
2019                         return;
2020                 }
2021
2022                 $wgOut->addHTML( $this->editFormPageTop );
2023
2024                 if ( $wgUser->getOption( 'previewontop' ) ) {
2025                         $this->displayPreviewArea( $previewOutput, true );
2026                 }
2027
2028                 $wgOut->addHTML( $this->editFormTextTop );
2029
2030                 $showToolbar = true;
2031                 if ( $this->wasDeletedSinceLastEdit() ) {
2032                         if ( $this->formtype == 'save' ) {
2033                                 // Hide the toolbar and edit area, user can click preview to get it back
2034                                 // Add an confirmation checkbox and explanation.
2035                                 $showToolbar = false;
2036                         } else {
2037                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
2038                                         'deletedwhileediting' );
2039                         }
2040                 }
2041
2042                 //@todo: add EditForm plugin interface and use it here!
2043                 //       search for textarea1 and textares2, and allow EditForm to override all uses.
2044                 $wgOut->addHTML( Html::openElement( 'form', array( 'id' => self::EDITFORM_ID, 'name' => self::EDITFORM_ID,
2045                         'method' => 'post', 'action' => $this->getActionURL( $this->getContextTitle() ),
2046                         'enctype' => 'multipart/form-data' ) ) );
2047
2048                 if ( is_callable( $formCallback ) ) {
2049                         call_user_func_array( $formCallback, array( &$wgOut ) );
2050                 }
2051
2052                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
2053
2054                 // Put these up at the top to ensure they aren't lost on early form submission
2055                 $this->showFormBeforeText();
2056
2057                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
2058                         $username = $this->lastDelete->user_name;
2059                         $comment = $this->lastDelete->log_comment;
2060
2061                         // It is better to not parse the comment at all than to have templates expanded in the middle
2062                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
2063                         $key = $comment === ''
2064                                 ? 'confirmrecreate-noreason'
2065                                 : 'confirmrecreate';
2066                         $wgOut->addHTML(
2067                                 '<div class="mw-confirm-recreate">' .
2068                                         wfMessage( $key, $username, "<nowiki>$comment</nowiki>" )->parse() .
2069                                 Xml::checkLabel( wfMessage( 'recreate' )->text(), 'wpRecreate', 'wpRecreate', false,
2070                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
2071                                 ) .
2072                                 '</div>'
2073                         );
2074                 }
2075
2076                 # When the summary is hidden, also hide them on preview/show changes
2077                 if( $this->nosummary ) {
2078                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
2079                 }
2080
2081                 # If a blank edit summary was previously provided, and the appropriate
2082                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
2083                 # user being bounced back more than once in the event that a summary
2084                 # is not required.
2085                 #####
2086                 # For a bit more sophisticated detection of blank summaries, hash the
2087                 # automatic one and pass that in the hidden field wpAutoSummary.
2088                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
2089                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
2090                 }
2091
2092                 if ( $this->undidRev ) {
2093                         $wgOut->addHTML( Html::hidden( 'wpUndidRevision', $this->undidRev ) );
2094                 }
2095
2096                 if ( $this->hasPresetSummary ) {
2097                         // If a summary has been preset using &summary= we dont want to prompt for
2098                         // a different summary. Only prompt for a summary if the summary is blanked.
2099                         // (Bug 17416)
2100                         $this->autoSumm = md5( '' );
2101                 }
2102
2103                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
2104                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
2105
2106                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
2107
2108                 $wgOut->addHTML( Html::hidden( 'format', $this->contentFormat ) );
2109                 $wgOut->addHTML( Html::hidden( 'model', $this->contentModel ) );
2110
2111                 if ( $this->section == 'new' ) {
2112                         $this->showSummaryInput( true, $this->summary );
2113                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
2114                 }
2115
2116                 $wgOut->addHTML( $this->editFormTextBeforeContent );
2117
2118                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
2119                         $wgOut->addHTML( EditPage::getEditToolbar() );
2120                 }
2121
2122                 if ( $this->isConflict ) {
2123                         // In an edit conflict bypass the overrideable content form method
2124                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2125                         // resolved between page source edits and custom ui edits using the
2126                         // custom edit ui.
2127                         $this->textbox2 = $this->textbox1;
2128
2129                         $content = $this->getCurrentContent();
2130                         $this->textbox1 = $this->toEditText( $content );
2131
2132                         $this->showTextbox1();
2133                 } else {
2134                         $this->showContentForm();
2135                 }
2136
2137                 $wgOut->addHTML( $this->editFormTextAfterContent );
2138
2139                 $this->showStandardInputs();
2140
2141                 $this->showFormAfterText();
2142
2143                 $this->showTosSummary();
2144
2145                 $this->showEditTools();
2146
2147                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2148
2149                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2150                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2151
2152                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2153                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2154
2155                 if ( $this->isConflict ) {
2156                         try {
2157                                 $this->showConflict();
2158                         } catch ( MWContentSerializationException $ex ) {
2159                                 // this can't really happen, but be nice if it does.
2160                                 $msg = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
2161                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>');
2162                         }
2163                 }
2164
2165                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2166
2167                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2168                         $this->displayPreviewArea( $previewOutput, false );
2169                 }
2170
2171                 wfProfileOut( __METHOD__ );
2172         }
2173
2174         /**
2175          * Extract the section title from current section text, if any.
2176          *
2177          * @param string $text
2178          * @return Mixed|string or false
2179          */
2180         public static function extractSectionTitle( $text ) {
2181                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2182                 if ( !empty( $matches[2] ) ) {
2183                         global $wgParser;
2184                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2185                 } else {
2186                         return false;
2187                 }
2188         }
2189
2190         protected function showHeader() {
2191                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2192
2193                 if ( $this->mTitle->isTalkPage() ) {
2194                         $wgOut->addWikiMsg( 'talkpagetext' );
2195                 }
2196
2197                 // Add edit notices
2198                 $wgOut->addHTML( implode( "\n", $this->mTitle->getEditNotices() ) );
2199
2200                 if ( $this->isConflict ) {
2201                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2202                         $this->edittime = $this->mArticle->getTimestamp();
2203                 } else {
2204                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2205                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2206                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2207                                 // Someone is welcome to try refactoring though
2208                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2209                                 return false;
2210                         }
2211
2212                         if ( $this->section != '' && $this->section != 'new' ) {
2213                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2214                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 ); //FIXME: use Content object
2215                                         if ( $sectionTitle !== false ) {
2216                                                 $this->summary = "/* $sectionTitle */ ";
2217                                         }
2218                                 }
2219                         }
2220
2221                         if ( $this->missingComment ) {
2222                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2223                         }
2224
2225                         if ( $this->missingSummary && $this->section != 'new' ) {
2226                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2227                         }
2228
2229                         if ( $this->missingSummary && $this->section == 'new' ) {
2230                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2231                         }
2232
2233                         if ( $this->hookError !== '' ) {
2234                                 $wgOut->addWikiText( $this->hookError );
2235                         }
2236
2237                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2238                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2239                         }
2240
2241                         if ( $this->section != 'new' ) {
2242                                 $revision = $this->mArticle->getRevisionFetched();
2243                                 if ( $revision ) {
2244                                         // Let sysop know that this will make private content public if saved
2245
2246                                         if ( !$revision->userCan( Revision::DELETED_TEXT, $wgUser ) ) {
2247                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
2248                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2249                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
2250                                         }
2251
2252                                         if ( !$revision->isCurrent() ) {
2253                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2254                                                 $wgOut->addWikiMsg( 'editingold' );
2255                                         }
2256                                 } elseif ( $this->mTitle->exists() ) {
2257                                         // Something went wrong
2258
2259                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2260                                                 array( 'missing-revision', $this->oldid ) );
2261                                 }
2262                         }
2263                 }
2264
2265                 if ( wfReadOnly() ) {
2266                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
2267                 } elseif ( $wgUser->isAnon() ) {
2268                         if ( $this->formtype != 'preview' ) {
2269                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
2270                         } else {
2271                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
2272                         }
2273                 } else {
2274                         if ( $this->isCssJsSubpage ) {
2275                                 # Check the skin exists
2276                                 if ( $this->isWrongCaseCssJsPage ) {
2277                                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
2278                                 }
2279                                 if ( $this->formtype !== 'preview' ) {
2280                                         if ( $this->isCssSubpage ) {
2281                                                 $wgOut->wrapWikiMsg( "<div id='mw-usercssyoucanpreview'>\n$1\n</div>", array( 'usercssyoucanpreview' ) );
2282                                         }
2283
2284                                         if ( $this->isJsSubpage ) {
2285                                                 $wgOut->wrapWikiMsg( "<div id='mw-userjsyoucanpreview'>\n$1\n</div>", array( 'userjsyoucanpreview' ) );
2286                                         }
2287                                 }
2288                         }
2289                 }
2290
2291                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2292                         # Is the title semi-protected?
2293                         if ( $this->mTitle->isSemiProtected() ) {
2294                                 $noticeMsg = 'semiprotectedpagewarning';
2295                         } else {
2296                                 # Then it must be protected based on static groups (regular)
2297                                 $noticeMsg = 'protectedpagewarning';
2298                         }
2299                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2300                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2301                 }
2302                 if ( $this->mTitle->isCascadeProtected() ) {
2303                         # Is this page under cascading protection from some source pages?
2304                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2305                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2306                         $cascadeSourcesCount = count( $cascadeSources );
2307                         if ( $cascadeSourcesCount > 0 ) {
2308                                 # Explain, and list the titles responsible
2309                                 foreach ( $cascadeSources as $page ) {
2310                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2311                                 }
2312                         }
2313                         $notice .= '</div>';
2314                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2315                 }
2316                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2317                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2318                                 array( 'lim' => 1,
2319                                         'showIfEmpty' => false,
2320                                         'msgKey' => array( 'titleprotectedwarning' ),
2321                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2322                 }
2323
2324                 if ( $this->kblength === false ) {
2325                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2326                 }
2327
2328                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2329                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2330                                 array( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) ) );
2331                 } else {
2332                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2333                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2334                                         array( 'longpage-hint', $wgLang->formatSize( strlen( $this->textbox1 ) ), strlen( $this->textbox1 ) )
2335                                 );
2336                         }
2337                 }
2338                 # Add header copyright warning
2339                 $this->showHeaderCopyrightWarning();
2340         }
2341
2342
2343         /**
2344          * Standard summary input and label (wgSummary), abstracted so EditPage
2345          * subclasses may reorganize the form.
2346          * Note that you do not need to worry about the label's for=, it will be
2347          * inferred by the id given to the input. You can remove them both by
2348          * passing array( 'id' => false ) to $userInputAttrs.
2349          *
2350          * @param $summary string The value of the summary input
2351          * @param $labelText string The html to place inside the label
2352          * @param $inputAttrs array of attrs to use on the input
2353          * @param $spanLabelAttrs array of attrs to use on the span inside the label
2354          *
2355          * @return array An array in the format array( $label, $input )
2356          */
2357         function getSummaryInput( $summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null ) {
2358                 // Note: the maxlength is overriden in JS to 255 and to make it use UTF-8 bytes, not characters.
2359                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2360                         'id' => 'wpSummary',
2361                         'maxlength' => '200',
2362                         'tabindex' => '1',
2363                         'size' => 60,
2364                         'spellcheck' => 'true',
2365                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2366
2367                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2368                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2369                         'id' => "wpSummaryLabel"
2370                 );
2371
2372                 $label = null;
2373                 if ( $labelText ) {
2374                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
2375                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2376                 }
2377
2378                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2379
2380                 return array( $label, $input );
2381         }
2382
2383         /**
2384          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2385          *                          up top, or false if this is the comment summary
2386          *                          down below the textarea
2387          * @param $summary String: The text of the summary to display
2388          * @return String
2389          */
2390         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2391                 global $wgOut, $wgContLang;
2392                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2393                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2394                 if ( $isSubjectPreview ) {
2395                         if ( $this->nosummary ) {
2396                                 return;
2397                         }
2398                 } else {
2399                         if ( !$this->mShowSummaryField ) {
2400                                 return;
2401                         }
2402                 }
2403                 $summary = $wgContLang->recodeForEdit( $summary );
2404                 $labelText = wfMessage( $isSubjectPreview ? 'subject' : 'summary' )->parse();
2405                 list( $label, $input ) = $this->getSummaryInput( $summary, $labelText, array( 'class' => $summaryClass ), array() );
2406                 $wgOut->addHTML( "{$label} {$input}" );
2407         }
2408
2409         /**
2410          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2411          *                          up top, or false if this is the comment summary
2412          *                          down below the textarea
2413          * @param $summary String: the text of the summary to display
2414          * @return String
2415          */
2416         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2417                 if ( !$summary || ( !$this->preview && !$this->diff ) ) {
2418                         return "";
2419                 }
2420
2421                 global $wgParser;
2422
2423                 if ( $isSubjectPreview ) {
2424                         $summary = wfMessage( 'newsectionsummary', $wgParser->stripSectionName( $summary ) )
2425                                 ->inContentLanguage()->text();
2426                 }
2427
2428                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2429
2430                 $summary = wfMessage( $message )->parse() . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2431                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2432         }
2433
2434         protected function showFormBeforeText() {
2435                 global $wgOut;
2436                 $section = htmlspecialchars( $this->section );
2437                 $wgOut->addHTML( <<<HTML
2438 <input type='hidden' value="{$section}" name="wpSection" />
2439 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2440 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2441 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2442
2443 HTML
2444                 );
2445                 if ( !$this->checkUnicodeCompliantBrowser() ) {
2446                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2447                 }
2448         }
2449
2450         protected function showFormAfterText() {
2451                 global $wgOut, $wgUser;
2452                 /**
2453                  * To make it harder for someone to slip a user a page
2454                  * which submits an edit form to the wiki without their
2455                  * knowledge, a random token is associated with the login
2456                  * session. If it's not passed back with the submission,
2457                  * we won't save the page, or render user JavaScript and
2458                  * CSS previews.
2459                  *
2460                  * For anon editors, who may not have a session, we just
2461                  * include the constant suffix to prevent editing from
2462                  * broken text-mangling proxies.
2463                  */
2464                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2465         }
2466
2467         /**
2468          * Subpage overridable method for printing the form for page content editing
2469          * By default this simply outputs wpTextbox1
2470          * Subclasses can override this to provide a custom UI for editing;
2471          * be it a form, or simply wpTextbox1 with a modified content that will be
2472          * reverse modified when extracted from the post data.
2473          * Note that this is basically the inverse for importContentFormData
2474          */
2475         protected function showContentForm() {
2476                 $this->showTextbox1();
2477         }
2478
2479         /**
2480          * Method to output wpTextbox1
2481          * The $textoverride method can be used by subclasses overriding showContentForm
2482          * to pass back to this method.
2483          *
2484          * @param $customAttribs array of html attributes to use in the textarea
2485          * @param $textoverride String: optional text to override $this->textarea1 with
2486          */
2487         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2488                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2489                         $attribs = array( 'style' => 'display:none;' );
2490                 } else {
2491                         $classes = array(); // Textarea CSS
2492                         if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2493                                 # Is the title semi-protected?
2494                                 if ( $this->mTitle->isSemiProtected() ) {
2495                                         $classes[] = 'mw-textarea-sprotected';
2496                                 } else {
2497                                         # Then it must be protected based on static groups (regular)
2498                                         $classes[] = 'mw-textarea-protected';
2499                                 }
2500                                 # Is the title cascade-protected?
2501                                 if ( $this->mTitle->isCascadeProtected() ) {
2502                                         $classes[] = 'mw-textarea-cprotected';
2503                                 }
2504                         }
2505
2506                         $attribs = array( 'tabindex' => 1 );
2507
2508                         if ( is_array( $customAttribs ) ) {
2509                                 $attribs += $customAttribs;
2510                         }
2511
2512                         if ( count( $classes ) ) {
2513                                 if ( isset( $attribs['class'] ) ) {
2514                                         $classes[] = $attribs['class'];
2515                                 }
2516                                 $attribs['class'] = implode( ' ', $classes );
2517                         }
2518                 }
2519
2520                 $this->showTextbox( $textoverride !== null ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
2521         }
2522
2523         protected function showTextbox2() {
2524                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2525         }
2526
2527         protected function showTextbox( $text, $name, $customAttribs = array() ) {
2528                 global $wgOut, $wgUser;
2529
2530                 $wikitext = $this->safeUnicodeOutput( $text );
2531                 if ( strval( $wikitext ) !== '' ) {
2532                         // Ensure there's a newline at the end, otherwise adding lines
2533                         // is awkward.
2534                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2535                         // mode will show an extra newline. A bit annoying.
2536                         $wikitext .= "\n";
2537                 }
2538
2539                 $attribs = $customAttribs + array(
2540                         'accesskey' => ',',
2541                         'id'   => $name,
2542                         'cols' => $wgUser->getIntOption( 'cols' ),
2543                         'rows' => $wgUser->getIntOption( 'rows' ),
2544                         'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
2545                 );
2546
2547                 $pageLang = $this->mTitle->getPageLanguage();
2548                 $attribs['lang'] = $pageLang->getCode();
2549                 $attribs['dir'] = $pageLang->getDir();
2550
2551                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2552         }
2553
2554         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2555                 global $wgOut;
2556                 $classes = array();
2557                 if ( $isOnTop ) {
2558                         $classes[] = 'ontop';
2559                 }
2560
2561                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2562
2563                 if ( $this->formtype != 'preview' ) {
2564                         $attribs['style'] = 'display: none;';
2565                 }
2566
2567                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
2568
2569                 if ( $this->formtype == 'preview' ) {
2570                         $this->showPreview( $previewOutput );
2571                 }
2572
2573                 $wgOut->addHTML( '</div>' );
2574
2575                 if ( $this->formtype == 'diff' ) {
2576                         try {
2577                                 $this->showDiff();
2578                         } catch ( MWContentSerializationException $ex ) {
2579                                 $msg = wfMessage( 'content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
2580                                 $wgOut->addWikiText( '<div class="error">' . $msg->text() . '</div>');
2581                         }
2582                 }
2583         }
2584
2585         /**
2586          * Append preview output to $wgOut.
2587          * Includes category rendering if this is a category page.
2588          *
2589          * @param $text String: the HTML to be output for the preview.
2590          */
2591         protected function showPreview( $text ) {
2592                 global $wgOut;
2593                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2594                         $this->mArticle->openShowCategory();
2595                 }
2596                 # This hook seems slightly odd here, but makes things more
2597                 # consistent for extensions.
2598                 wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
2599                 $wgOut->addHTML( $text );
2600                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2601                         $this->mArticle->closeShowCategory();
2602                 }
2603         }
2604
2605         /**
2606          * Get a diff between the current contents of the edit box and the
2607          * version of the page we're editing from.
2608          *
2609          * If this is a section edit, we'll replace the section as for final
2610          * save and then make a comparison.
2611          */
2612         function showDiff() {
2613                 global $wgUser, $wgContLang, $wgOut;
2614
2615                 $oldtitlemsg = 'currentrev';
2616                 # if message does not exist, show diff against the preloaded default
2617                 if( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
2618                         $oldtext = $this->mTitle->getDefaultMessageText();
2619                         if( $oldtext !== false ) {
2620                                 $oldtitlemsg = 'defaultmessagetext';
2621                                 $oldContent = $this->toEditContent( $oldtext );
2622                         } else {
2623                                 $oldContent = null;
2624                         }
2625                 } else {
2626                         $oldContent = $this->getCurrentContent();
2627                 }
2628
2629                 $textboxContent = $this->toEditContent( $this->textbox1 );
2630
2631                 $newContent = $this->mArticle->replaceSectionContent(
2632                                                         $this->section, $textboxContent,
2633                                                         $this->summary, $this->edittime );
2634
2635                 if ( $newContent ) {
2636                         ContentHandler::runLegacyHooks( 'EditPageGetDiffText', array( $this, &$newContent ) );
2637                         wfRunHooks( 'EditPageGetDiffContent', array( $this, &$newContent ) );
2638
2639                         $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
2640                         $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
2641                 }
2642
2643                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
2644                         $oldtitle = wfMessage( $oldtitlemsg )->parse();
2645                         $newtitle = wfMessage( 'yourtext' )->parse();
2646
2647                         if ( !$oldContent ) {
2648                                 $oldContent = $newContent->getContentHandler()->makeEmptyContent();
2649                         }
2650
2651                         if ( !$newContent ) {
2652                                 $newContent = $oldContent->getContentHandler()->makeEmptyContent();
2653                         }
2654
2655                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
2656                         $de->setContent( $oldContent, $newContent );
2657
2658                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2659                         $de->showDiffStyle();
2660                 } else {
2661                         $difftext = '';
2662                 }
2663
2664                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2665         }
2666
2667         /**
2668          * Show the header copyright warning.
2669          */
2670         protected function showHeaderCopyrightWarning() {
2671                 $msg = 'editpage-head-copy-warn';
2672                 if ( !wfMessage( $msg )->isDisabled() ) {
2673                         global $wgOut;
2674                         $wgOut->wrapWikiMsg( "<div class='editpage-head-copywarn'>\n$1\n</div>",
2675                                 'editpage-head-copy-warn' );
2676                 }
2677         }
2678
2679         /**
2680          * Give a chance for site and per-namespace customizations of
2681          * terms of service summary link that might exist separately
2682          * from the copyright notice.
2683          *
2684          * This will display between the save button and the edit tools,
2685          * so should remain short!
2686          */
2687         protected function showTosSummary() {
2688                 $msg = 'editpage-tos-summary';
2689                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
2690                 if ( !wfMessage( $msg )->isDisabled() ) {
2691                         global $wgOut;
2692                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
2693                         $wgOut->addWikiMsg( $msg );
2694                         $wgOut->addHTML( '</div>' );
2695                 }
2696         }
2697
2698         protected function showEditTools() {
2699                 global $wgOut;
2700                 $wgOut->addHTML( '<div class="mw-editTools">' .
2701                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
2702                         '</div>' );
2703         }
2704
2705         /**
2706          * Get the copyright warning
2707          *
2708          * Renamed to getCopyrightWarning(), old name kept around for backwards compatibility
2709          */
2710         protected function getCopywarn() {
2711                 return self::getCopyrightWarning( $this->mTitle );
2712         }
2713
2714         public static function getCopyrightWarning( $title ) {
2715                 global $wgRightsText;
2716                 if ( $wgRightsText ) {
2717                         $copywarnMsg = array( 'copyrightwarning',
2718                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]',
2719                                 $wgRightsText );
2720                 } else {
2721                         $copywarnMsg = array( 'copyrightwarning2',
2722                                 '[[' . wfMessage( 'copyrightpage' )->inContentLanguage()->text() . ']]' );
2723                 }
2724                 // Allow for site and per-namespace customization of contribution/copyright notice.
2725                 wfRunHooks( 'EditPageCopyrightWarning', array( $title, &$copywarnMsg ) );
2726
2727                 return "<div id=\"editpage-copywarn\">\n" .
2728                         call_user_func_array( 'wfMessage', $copywarnMsg )->plain() . "\n</div>";
2729         }
2730
2731         protected function showStandardInputs( &$tabindex = 2 ) {
2732                 global $wgOut;
2733                 $wgOut->addHTML( "<div class='editOptions'>\n" );
2734
2735                 if ( $this->section != 'new' ) {
2736                         $this->showSummaryInput( false, $this->summary );
2737                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
2738                 }
2739
2740                 $checkboxes = $this->getCheckboxes( $tabindex,
2741                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
2742                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
2743
2744                 // Show copyright warning.
2745                 $wgOut->addWikiText( $this->getCopywarn() );
2746                 $wgOut->addHTML( $this->editFormTextAfterWarn );
2747
2748                 $wgOut->addHTML( "<div class='editButtons'>\n" );
2749                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
2750
2751                 $cancel = $this->getCancelLink();
2752                 if ( $cancel !== '' ) {
2753                         $cancel .= wfMessage( 'pipe-separator' )->text();
2754                 }
2755                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMessage( 'edithelppage' )->inContentLanguage()->text() );
2756                 $edithelp = '<a target="helpwindow" href="' . $edithelpurl . '">' .
2757                         wfMessage( 'edithelp' )->escaped() . '</a> ' .
2758                         wfMessage( 'newwindow' )->parse();
2759                 $wgOut->addHTML( "      <span class='cancelLink'>{$cancel}</span>\n" );
2760                 $wgOut->addHTML( "      <span class='editHelp'>{$edithelp}</span>\n" );
2761                 $wgOut->addHTML( "</div><!-- editButtons -->\n" );
2762                 wfRunHooks( 'EditPage::showStandardInputs:options', array( $this, $wgOut, &$tabindex ) );
2763                 $wgOut->addHTML( "</div><!-- editOptions -->\n" );
2764         }
2765
2766         /**
2767          * Show an edit conflict. textbox1 is already shown in showEditForm().
2768          * If you want to use another entry point to this function, be careful.
2769          */
2770         protected function showConflict() {
2771                 global $wgOut;
2772
2773                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
2774                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2775
2776                         $content1 = $this->toEditContent( $this->textbox1 );
2777                         $content2 = $this->toEditContent( $this->textbox2 );
2778
2779                         $handler = ContentHandler::getForModelID( $this->contentModel );
2780                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
2781                         $de->setContent( $content2, $content1 );
2782                         $de->showDiff(
2783                                 wfMessage( 'yourtext' )->parse(),
2784                                 wfMessage( 'storedversion' )->text()
2785                         );
2786
2787                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2788                         $this->showTextbox2();
2789                 }
2790         }
2791
2792         /**
2793          * @return string
2794          */
2795         public function getCancelLink() {
2796                 $cancelParams = array();
2797                 if ( !$this->isConflict && $this->oldid > 0 ) {
2798                         $cancelParams['oldid'] = $this->oldid;
2799                 }
2800
2801                 return Linker::linkKnown(
2802                         $this->getContextTitle(),
2803                         wfMessage( 'cancel' )->parse(),
2804                         array( 'id' => 'mw-editform-cancel' ),
2805                         $cancelParams
2806                 );
2807         }
2808
2809         /**
2810          * Returns the URL to use in the form's action attribute.
2811          * This is used by EditPage subclasses when simply customizing the action
2812          * variable in the constructor is not enough. This can be used when the
2813          * EditPage lives inside of a Special page rather than a custom page action.
2814          *
2815          * @param $title Title object for which is being edited (where we go to for &action= links)
2816          * @return string
2817          */
2818         protected function getActionURL( Title $title ) {
2819                 return $title->getLocalURL( array( 'action' => $this->action ) );
2820         }
2821
2822         /**
2823          * Check if a page was deleted while the user was editing it, before submit.
2824          * Note that we rely on the logging table, which hasn't been always there,
2825          * but that doesn't matter, because this only applies to brand new
2826          * deletes.
2827          */
2828         protected function wasDeletedSinceLastEdit() {
2829                 if ( $this->deletedSinceEdit !== null ) {
2830                         return $this->deletedSinceEdit;
2831                 }
2832
2833                 $this->deletedSinceEdit = false;
2834
2835                 if ( $this->mTitle->isDeletedQuick() ) {
2836                         $this->lastDelete = $this->getLastDelete();
2837                         if ( $this->lastDelete ) {
2838                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
2839                                 if ( $deleteTime > $this->starttime ) {
2840                                         $this->deletedSinceEdit = true;
2841                                 }
2842                         }
2843                 }
2844
2845                 return $this->deletedSinceEdit;
2846         }
2847
2848         protected function getLastDelete() {
2849                 $dbr = wfGetDB( DB_SLAVE );
2850                 $data = $dbr->selectRow(
2851                         array( 'logging', 'user' ),
2852                         array( 'log_type',
2853                                    'log_action',
2854                                    'log_timestamp',
2855                                    'log_user',
2856                                    'log_namespace',
2857                                    'log_title',
2858                                    'log_comment',
2859                                    'log_params',
2860                                    'log_deleted',
2861                                    'user_name' ),
2862                         array( 'log_namespace' => $this->mTitle->getNamespace(),
2863                                    'log_title' => $this->mTitle->getDBkey(),
2864                                    'log_type' => 'delete',
2865                                    'log_action' => 'delete',
2866                                    'user_id=log_user' ),
2867                         __METHOD__,
2868                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
2869                 );
2870                 // Quick paranoid permission checks...
2871                 if ( is_object( $data ) ) {
2872                         if ( $data->log_deleted & LogPage::DELETED_USER ) {
2873                                 $data->user_name = wfMessage( 'rev-deleted-user' )->escaped();
2874                         }
2875
2876                         if ( $data->log_deleted & LogPage::DELETED_COMMENT ) {
2877                                 $data->log_comment = wfMessage( 'rev-deleted-comment' )->escaped();
2878                         }
2879                 }
2880                 return $data;
2881         }
2882
2883         /**
2884          * Get the rendered text for previewing.
2885          * @throws MWException
2886          * @return string
2887          */
2888         function getPreviewText() {
2889                 global $wgOut, $wgUser, $wgRawHtml, $wgLang;
2890
2891                 wfProfileIn( __METHOD__ );
2892
2893                 if ( $wgRawHtml && !$this->mTokenOk ) {
2894                         // Could be an offsite preview attempt. This is very unsafe if
2895                         // HTML is enabled, as it could be an attack.
2896                         $parsedNote = '';
2897                         if ( $this->textbox1 !== '' ) {
2898                                 // Do not put big scary notice, if previewing the empty
2899                                 // string, which happens when you initially edit
2900                                 // a category page, due to automatic preview-on-open.
2901                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
2902                                         wfMessage( 'session_fail_preview_html' )->text() . "</div>", true, /* interface */true );
2903                         }
2904                         wfProfileOut( __METHOD__ );
2905                         return $parsedNote;
2906                 }
2907
2908                 $note = '';
2909
2910                 try {
2911                         $content = $this->toEditContent( $this->textbox1 );
2912
2913                         $previewHTML = '';
2914                         if ( !wfRunHooks( 'AlternateEditPreview', array( $this, &$content, &$previewHTML, &$this->mParserOutput ) ) ) {
2915                                 wfProfileOut( __METHOD__ );
2916                                 return $previewHTML;
2917                         }
2918
2919                         if ( $this->mTriedSave && !$this->mTokenOk ) {
2920                                 if ( $this->mTokenOkExceptSuffix ) {
2921                                         $note = wfMessage( 'token_suffix_mismatch' )->plain() ;
2922
2923                                 } else {
2924                                         $note = wfMessage( 'session_fail_preview' )->plain() ;
2925                                 }
2926                         } elseif ( $this->incompleteForm ) {
2927                                 $note = wfMessage( 'edit_form_incomplete' )->plain() ;
2928                         } else {
2929                                 $note = wfMessage( 'previewnote' )->plain() .
2930                                         ' [[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' . wfMessage( 'continue-editing' )->text() . ']]';
2931                         }
2932
2933                         $parserOptions = $this->mArticle->makeParserOptions( $this->mArticle->getContext() );
2934                         $parserOptions->setEditSection( false );
2935                         $parserOptions->setIsPreview( true );
2936                         $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
2937
2938                         # don't parse non-wikitext pages, show message about preview
2939                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
2940                                 if( $this->mTitle->isCssJsSubpage() ) {
2941                                         $level = 'user';
2942                                 } elseif( $this->mTitle->isCssOrJsPage() ) {
2943                                         $level = 'site';
2944                                 } else {
2945                                         $level = false;
2946                                 }
2947
2948                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
2949                                         $format = 'css';
2950                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
2951                                         $format = 'js';
2952                                 } else {
2953                                         $format = false;
2954                                 }
2955
2956                                 # Used messages to make sure grep find them:
2957                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
2958                                 if( $level && $format ) {
2959                                         $note = "<div id='mw-{$level}{$format}preview'>" . wfMessage( "{$level}{$format}preview" )->text()  . "</div>";
2960                                 }
2961                         }
2962
2963                         $rt = $content->getRedirectChain();
2964                         if ( $rt ) {
2965                                 $previewHTML = $this->mArticle->viewRedirect( $rt, false );
2966                         } else {
2967
2968                                 # If we're adding a comment, we need to show the
2969                                 # summary as the headline
2970                                 if ( $this->section === "new" && $this->summary !== "" ) {
2971                                         $content = $content->addSectionHeader( $this->summary );
2972                                 }
2973
2974                                 $hook_args = array( $this, &$content );
2975                                 ContentHandler::runLegacyHooks( 'EditPageGetPreviewText', $hook_args );
2976                                 wfRunHooks( 'EditPageGetPreviewContent', $hook_args );
2977
2978                                 $parserOptions->enableLimitReport();
2979
2980                                 # For CSS/JS pages, we should have called the ShowRawCssJs hook here.
2981                                 # But it's now deprecated, so never mind
2982
2983                                 $content = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
2984                                 $parserOutput = $content->getParserOutput( $this->getArticle()->getTitle(), null, $parserOptions );
2985
2986                                 $previewHTML = $parserOutput->getText();
2987                                 $this->mParserOutput = $parserOutput;
2988                                 $wgOut->addParserOutputNoText( $parserOutput );
2989
2990                                 if ( count( $parserOutput->getWarnings() ) ) {
2991                                         $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
2992                                 }
2993                         }
2994                 } catch ( MWContentSerializationException $ex ) {
2995                         $m = wfMessage('content-failed-to-parse', $this->contentModel, $this->contentFormat, $ex->getMessage() );
2996                         $note .= "\n\n" . $m->parse();
2997                         $previewHTML = '';
2998                 }
2999
3000                 if ( $this->isConflict ) {
3001                         $conflict = '<h2 id="mw-previewconflict">' . wfMessage( 'previewconflict' )->escaped() . "</h2>\n";
3002                 } else {
3003                         $conflict = '<hr />';
3004                 }
3005
3006                 $previewhead = "<div class='previewnote'>\n" .
3007                         '<h2 id="mw-previewheader">' . wfMessage( 'preview' )->escaped() . "</h2>" .
3008                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
3009
3010                 $pageLang = $this->mTitle->getPageLanguage();
3011                 $attribs = array( 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
3012                         'class' => 'mw-content-' . $pageLang->getDir() );
3013                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
3014
3015                 wfProfileOut( __METHOD__ );
3016                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
3017         }
3018
3019         /**
3020          * @return Array
3021          */
3022         function getTemplates() {
3023                 if ( $this->preview || $this->section != '' ) {
3024                         $templates = array();
3025                         if ( !isset( $this->mParserOutput ) ) {
3026                                 return $templates;
3027                         }
3028                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
3029                                 foreach ( array_keys( $template ) as $dbk ) {
3030                                         $templates[] = Title::makeTitle( $ns, $dbk );
3031                                 }
3032                         }
3033                         return $templates;
3034                 } else {
3035                         return $this->mTitle->getTemplateLinksFrom();
3036                 }
3037         }
3038
3039         /**
3040          * Shows a bulletin board style toolbar for common editing functions.
3041          * It can be disabled in the user preferences.
3042          * The necessary JavaScript code can be found in skins/common/edit.js.
3043          *
3044          * @return string
3045          */
3046         static function getEditToolbar() {
3047                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
3048                 global $wgUseTeX, $wgEnableUploads, $wgForeignFileRepos;
3049
3050                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
3051
3052                 /**
3053                  * $toolarray is an array of arrays each of which includes the
3054                  * filename of the button image (without path), the opening
3055                  * tag, the closing tag, optionally a sample text that is
3056                  * inserted between the two when no selection is highlighted
3057                  * and.  The tip text is shown when the user moves the mouse
3058                  * over the button.
3059                  *
3060                  * Also here: accesskeys (key), which are not used yet until
3061                  * someone can figure out a way to make them work in
3062                  * IE. However, we should make sure these keys are not defined
3063                  * on the edit page.
3064                  */
3065                 $toolarray = array(
3066                         array(
3067                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
3068                                 'id'     => 'mw-editbutton-bold',
3069                                 'open'   => '\'\'\'',
3070                                 'close'  => '\'\'\'',
3071                                 'sample' => wfMessage( 'bold_sample' )->text(),
3072                                 'tip'    => wfMessage( 'bold_tip' )->text(),
3073                                 'key'    => 'B'
3074                         ),
3075                         array(
3076                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
3077                                 'id'     => 'mw-editbutton-italic',
3078                                 'open'   => '\'\'',
3079                                 'close'  => '\'\'',
3080                                 'sample' => wfMessage( 'italic_sample' )->text(),
3081                                 'tip'    => wfMessage( 'italic_tip' )->text(),
3082                                 'key'    => 'I'
3083                         ),
3084                         array(
3085                                 'image'  => $wgLang->getImageFile( 'button-link' ),
3086                                 'id'     => 'mw-editbutton-link',
3087                                 'open'   => '[[',
3088                                 'close'  => ']]',
3089                                 'sample' => wfMessage( 'link_sample' )->text(),
3090                                 'tip'    => wfMessage( 'link_tip' )->text(),
3091                                 'key'    => 'L'
3092                         ),
3093                         array(
3094                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
3095                                 'id'     => 'mw-editbutton-extlink',
3096                                 'open'   => '[',
3097                                 'close'  => ']',
3098                                 'sample' => wfMessage( 'extlink_sample' )->text(),
3099                                 'tip'    => wfMessage( 'extlink_tip' )->text(),
3100                                 'key'    => 'X'
3101                         ),
3102                         array(
3103                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
3104                                 'id'     => 'mw-editbutton-headline',
3105                                 'open'   => "\n== ",
3106                                 'close'  => " ==\n",
3107                                 'sample' => wfMessage( 'headline_sample' )->text(),
3108                                 'tip'    => wfMessage( 'headline_tip' )->text(),
3109                                 'key'    => 'H'
3110                         ),
3111                         $imagesAvailable ? array(
3112                                 'image'  => $wgLang->getImageFile( 'button-image' ),
3113                                 'id'     => 'mw-editbutton-image',
3114                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
3115                                 'close'  => ']]',
3116                                 'sample' => wfMessage( 'image_sample' )->text(),
3117                                 'tip'    => wfMessage( 'image_tip' )->text(),
3118                                 'key'    => 'D',
3119                         ) : false,
3120                         $imagesAvailable ? array(
3121                                 'image'  => $wgLang->getImageFile( 'button-media' ),
3122                                 'id'     => 'mw-editbutton-media',
3123                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
3124                                 'close'  => ']]',
3125                                 'sample' => wfMessage( 'media_sample' )->text(),
3126                                 'tip'    => wfMessage( 'media_tip' )->text(),
3127                                 'key'    => 'M'
3128                         ) : false,
3129                         $wgUseTeX ? array(
3130                                 'image'  => $wgLang->getImageFile( 'button-math' ),
3131                                 'id'     => 'mw-editbutton-math',
3132                                 'open'   => "<math>",
3133                                 'close'  => "</math>",
3134                                 'sample' => wfMessage( 'math_sample' )->text(),
3135                                 'tip'    => wfMessage( 'math_tip' )->text(),
3136                                 'key'    => 'C'
3137                         ) : false,
3138                         array(
3139                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
3140                                 'id'     => 'mw-editbutton-nowiki',
3141                                 'open'   => "<nowiki>",
3142                                 'close'  => "</nowiki>",
3143                                 'sample' => wfMessage( 'nowiki_sample' )->text(),
3144                                 'tip'    => wfMessage( 'nowiki_tip' )->text(),
3145                                 'key'    => 'N'
3146                         ),
3147                         array(
3148                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
3149                                 'id'     => 'mw-editbutton-signature',
3150                                 'open'   => '--~~~~',
3151                                 'close'  => '',
3152                                 'sample' => '',
3153                                 'tip'    => wfMessage( 'sig_tip' )->text(),
3154                                 'key'    => 'Y'
3155                         ),
3156                         array(
3157                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
3158                                 'id'     => 'mw-editbutton-hr',
3159                                 'open'   => "\n----\n",
3160                                 'close'  => '',
3161                                 'sample' => '',
3162                                 'tip'    => wfMessage( 'hr_tip' )->text(),
3163                                 'key'    => 'R'
3164                         )
3165                 );
3166
3167                 $script = 'mw.loader.using("mediawiki.action.edit", function() {';
3168                 foreach ( $toolarray as $tool ) {
3169                         if ( !$tool ) {
3170                                 continue;
3171                         }
3172
3173                         $params = array(
3174                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
3175                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3176                                 // Older browsers show a "speedtip" type message only for ALT.
3177                                 // Ideally these should be different, realistically they
3178                                 // probably don't need to be.
3179                                 $tip = $tool['tip'],
3180                                 $open = $tool['open'],
3181                                 $close = $tool['close'],
3182                                 $sample = $tool['sample'],
3183                                 $cssId = $tool['id'],
3184                         );
3185
3186                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
3187                 }
3188
3189                 // This used to be called on DOMReady from mediawiki.action.edit, which
3190                 // ended up causing race conditions with the setup code above.
3191                 $script .= "\n" .
3192                         "// Create button bar\n" .
3193                         "$(function() { mw.toolbar.init(); } );\n";
3194
3195                 $script .= '});';
3196                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3197
3198                 $toolbar = '<div id="toolbar"></div>';
3199
3200                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3201
3202                 return $toolbar;
3203         }
3204
3205         /**
3206          * Returns an array of html code of the following checkboxes:
3207          * minor and watch
3208          *
3209          * @param $tabindex int Current tabindex
3210          * @param $checked Array of checkbox => bool, where bool indicates the checked
3211          *                 status of the checkbox
3212          *
3213          * @return array
3214          */
3215         public function getCheckboxes( &$tabindex, $checked ) {
3216                 global $wgUser;
3217
3218                 $checkboxes = array();
3219
3220                 // don't show the minor edit checkbox if it's a new page or section
3221                 if ( !$this->isNew ) {
3222                         $checkboxes['minor'] = '';
3223                         $minorLabel = wfMessage( 'minoredit' )->parse();
3224                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3225                                 $attribs = array(
3226                                         'tabindex'  => ++$tabindex,
3227                                         'accesskey' => wfMessage( 'accesskey-minoredit' )->text(),
3228                                         'id'        => 'wpMinoredit',
3229                                 );
3230                                 $checkboxes['minor'] =
3231                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3232                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3233                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3234                                         ">{$minorLabel}</label>";
3235                         }
3236                 }
3237
3238                 $watchLabel = wfMessage( 'watchthis' )->parse();
3239                 $checkboxes['watch'] = '';
3240                 if ( $wgUser->isLoggedIn() ) {
3241                         $attribs = array(
3242                                 'tabindex'  => ++$tabindex,
3243                                 'accesskey' => wfMessage( 'accesskey-watch' )->text(),
3244                                 'id'        => 'wpWatchthis',
3245                         );
3246                         $checkboxes['watch'] =
3247                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3248                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3249                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3250                                 ">{$watchLabel}</label>";
3251                 }
3252                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3253                 return $checkboxes;
3254         }
3255
3256         /**
3257          * Returns an array of html code of the following buttons:
3258          * save, diff, preview and live
3259          *
3260          * @param $tabindex int Current tabindex
3261          *
3262          * @return array
3263          */
3264         public function getEditButtons( &$tabindex ) {
3265                 $buttons = array();
3266
3267                 $temp = array(
3268                         'id'        => 'wpSave',
3269                         'name'      => 'wpSave',
3270                         'type'      => 'submit',
3271                         'tabindex'  => ++$tabindex,
3272                         'value'     => wfMessage( 'savearticle' )->text(),
3273                         'accesskey' => wfMessage( 'accesskey-save' )->text(),
3274                         'title'     => wfMessage( 'tooltip-save' )->text() . ' [' . wfMessage( 'accesskey-save' )->text() . ']',
3275                 );
3276                 $buttons['save'] = Xml::element( 'input', $temp, '' );
3277
3278                 ++$tabindex; // use the same for preview and live preview
3279                 $temp = array(
3280                         'id'        => 'wpPreview',
3281                         'name'      => 'wpPreview',
3282                         'type'      => 'submit',
3283                         'tabindex'  => $tabindex,
3284                         'value'     => wfMessage( 'showpreview' )->text(),
3285                         'accesskey' => wfMessage( 'accesskey-preview' )->text(),
3286                         'title'     => wfMessage( 'tooltip-preview' )->text() . ' [' . wfMessage( 'accesskey-preview' )->text() . ']',
3287                 );
3288                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
3289                 $buttons['live'] = '';
3290
3291                 $temp = array(
3292                         'id'        => 'wpDiff',
3293                         'name'      => 'wpDiff',
3294                         'type'      => 'submit',
3295                         'tabindex'  => ++$tabindex,
3296                         'value'     => wfMessage( 'showdiff' )->text(),
3297                         'accesskey' => wfMessage( 'accesskey-diff' )->text(),
3298                         'title'     => wfMessage( 'tooltip-diff' )->text() . ' [' . wfMessage( 'accesskey-diff' )->text() . ']',
3299                 );
3300                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
3301
3302                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3303                 return $buttons;
3304         }
3305
3306         /**
3307          * Output preview text only. This can be sucked into the edit page
3308          * via JavaScript, and saves the server time rendering the skin as
3309          * well as theoretically being more robust on the client (doesn't
3310          * disturb the edit box's undo history, won't eat your text on
3311          * failure, etc).
3312          *
3313          * @todo This doesn't include category or interlanguage links.
3314          *       Would need to enhance it a bit, "<s>maybe wrap them in XML
3315          *       or something...</s>" that might also require more skin
3316          *       initialization, so check whether that's a problem.
3317          */
3318         function livePreview() {
3319                 global $wgOut;
3320                 $wgOut->disable();
3321                 header( 'Content-type: text/xml; charset=utf-8' );
3322                 header( 'Cache-control: no-cache' );
3323
3324                 $previewText = $this->getPreviewText();
3325                 #$categories = $skin->getCategoryLinks();
3326
3327                 $s =
3328                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3329                 Xml::tags( 'livepreview', null,
3330                         Xml::element( 'preview', null, $previewText )
3331                         #.      Xml::element( 'category', null, $categories )
3332                 );
3333                 echo $s;
3334         }
3335
3336         /**
3337          * Call the stock "user is blocked" page
3338          *
3339          * @deprecated in 1.19; throw an exception directly instead
3340          */
3341         function blockedPage() {
3342                 wfDeprecated( __METHOD__, '1.19' );
3343                 global $wgUser;
3344
3345                 throw new UserBlockedError( $wgUser->getBlock() );
3346         }
3347
3348         /**
3349          * Produce the stock "please login to edit pages" page
3350          *
3351          * @deprecated in 1.19; throw an exception directly instead
3352          */
3353         function userNotLoggedInPage() {
3354                 wfDeprecated( __METHOD__, '1.19' );
3355                 throw new PermissionsError( 'edit' );
3356         }
3357
3358         /**
3359          * Show an error page saying to the user that he has insufficient permissions
3360          * to create a new page
3361          *
3362          * @deprecated in 1.19; throw an exception directly instead
3363          */
3364         function noCreatePermission() {
3365                 wfDeprecated( __METHOD__, '1.19' );
3366                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
3367                 throw new PermissionsError( $permission );
3368         }
3369
3370         /**
3371          * Creates a basic error page which informs the user that
3372          * they have attempted to edit a nonexistent section.
3373          */
3374         function noSuchSectionPage() {
3375                 global $wgOut;
3376
3377                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3378
3379                 $res = wfMessage( 'nosuchsectiontext', $this->section )->parseAsBlock();
3380                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
3381                 $wgOut->addHTML( $res );
3382
3383                 $wgOut->returnToMain( false, $this->mTitle );
3384         }
3385
3386         /**
3387          * Produce the stock "your edit contains spam" page
3388          *
3389          * @param $match string|bool Text which triggered one or more filters
3390          * @deprecated since 1.17 Use method spamPageWithContent() instead
3391          */
3392         static function spamPage( $match = false ) {
3393                 wfDeprecated( __METHOD__, '1.17' );
3394
3395                 global $wgOut, $wgTitle;
3396
3397                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3398
3399                 $wgOut->addHTML( '<div id="spamprotected">' );
3400                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3401                 if ( $match ) {
3402                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3403                 }
3404                 $wgOut->addHTML( '</div>' );
3405
3406                 $wgOut->returnToMain( false, $wgTitle );
3407         }
3408
3409         /**
3410          * Show "your edit contains spam" page with your diff and text
3411          *
3412          * @param $match string|Array|bool Text (or array of texts) which triggered one or more filters
3413          */
3414         public function spamPageWithContent( $match = false ) {
3415                 global $wgOut, $wgLang;
3416                 $this->textbox2 = $this->textbox1;
3417
3418                 if( is_array( $match ) ){
3419                         $match = $wgLang->listToText( $match );
3420                 }
3421                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3422
3423                 $wgOut->addHTML( '<div id="spamprotected">' );
3424                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3425                 if ( $match ) {
3426                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3427                 }
3428                 $wgOut->addHTML( '</div>' );
3429
3430                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3431                 $this->showDiff();
3432
3433                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3434                 $this->showTextbox2();
3435
3436                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3437         }
3438
3439         /**
3440          * Format an anchor fragment as it would appear for a given section name
3441          * @param $text String
3442          * @return String
3443          * @private
3444          */
3445         function sectionAnchor( $text ) {
3446                 global $wgParser;
3447                 return $wgParser->guessSectionNameFromWikiText( $text );
3448         }
3449
3450         /**
3451          * Check if the browser is on a blacklist of user-agents known to
3452          * mangle UTF-8 data on form submission. Returns true if Unicode
3453          * should make it through, false if it's known to be a problem.
3454          * @return bool
3455          * @private
3456          */
3457         function checkUnicodeCompliantBrowser() {
3458                 global $wgBrowserBlackList, $wgRequest;
3459
3460                 $currentbrowser = $wgRequest->getHeader( 'User-Agent' );
3461                 if ( $currentbrowser === false ) {
3462                         // No User-Agent header sent? Trust it by default...
3463                         return true;
3464                 }
3465
3466                 foreach ( $wgBrowserBlackList as $browser ) {
3467                         if ( preg_match( $browser, $currentbrowser ) ) {
3468                                 return false;
3469                         }
3470                 }
3471                 return true;
3472         }
3473
3474         /**
3475          * Filter an input field through a Unicode de-armoring process if it
3476          * came from an old browser with known broken Unicode editing issues.
3477          *
3478          * @param $request WebRequest
3479          * @param $field String
3480          * @return String
3481          * @private
3482          */
3483         function safeUnicodeInput( $request, $field ) {
3484                 $text = rtrim( $request->getText( $field ) );
3485                 return $request->getBool( 'safemode' )
3486                         ? $this->unmakesafe( $text )
3487                         : $text;
3488         }
3489
3490         /**
3491          * @param $request WebRequest
3492          * @param $text string
3493          * @return string
3494          */
3495         function safeUnicodeText( $request, $text ) {
3496                 $text = rtrim( $text );
3497                 return $request->getBool( 'safemode' )
3498                         ? $this->unmakesafe( $text )
3499                         : $text;
3500         }
3501
3502         /**
3503          * Filter an output field through a Unicode armoring process if it is
3504          * going to an old browser with known broken Unicode editing issues.
3505          *
3506          * @param $text String
3507          * @return String
3508          * @private
3509          */
3510         function safeUnicodeOutput( $text ) {
3511                 global $wgContLang;
3512                 $codedText = $wgContLang->recodeForEdit( $text );
3513                 return $this->checkUnicodeCompliantBrowser()
3514                         ? $codedText
3515                         : $this->makesafe( $codedText );
3516         }
3517
3518         /**
3519          * A number of web browsers are known to corrupt non-ASCII characters
3520          * in a UTF-8 text editing environment. To protect against this,
3521          * detected browsers will be served an armored version of the text,
3522          * with non-ASCII chars converted to numeric HTML character references.
3523          *
3524          * Preexisting such character references will have a 0 added to them
3525          * to ensure that round-trips do not alter the original data.
3526          *
3527          * @param $invalue String
3528          * @return String
3529          * @private
3530          */
3531         function makesafe( $invalue ) {
3532                 // Armor existing references for reversability.
3533                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
3534
3535                 $bytesleft = 0;
3536                 $result = "";
3537                 $working = 0;
3538                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3539                         $bytevalue = ord( $invalue[$i] );
3540                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
3541                                 $result .= chr( $bytevalue );
3542                                 $bytesleft = 0;
3543                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
3544                                 $working = $working << 6;
3545                                 $working += ( $bytevalue & 0x3F );
3546                                 $bytesleft--;
3547                                 if ( $bytesleft <= 0 ) {
3548                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
3549                                 }
3550                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
3551                                 $working = $bytevalue & 0x1F;
3552                                 $bytesleft = 1;
3553                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
3554                                 $working = $bytevalue & 0x0F;
3555                                 $bytesleft = 2;
3556                         } else { // 1111 0xxx
3557                                 $working = $bytevalue & 0x07;
3558                                 $bytesleft = 3;
3559                         }
3560                 }
3561                 return $result;
3562         }
3563
3564         /**
3565          * Reverse the previously applied transliteration of non-ASCII characters
3566          * back to UTF-8. Used to protect data from corruption by broken web browsers
3567          * as listed in $wgBrowserBlackList.
3568          *
3569          * @param $invalue String
3570          * @return String
3571          * @private
3572          */
3573         function unmakesafe( $invalue ) {
3574                 $result = "";
3575                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3576                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
3577                                 $i += 3;
3578                                 $hexstring = "";
3579                                 do {
3580                                         $hexstring .= $invalue[$i];
3581                                         $i++;
3582                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
3583
3584                                 // Do some sanity checks. These aren't needed for reversability,
3585                                 // but should help keep the breakage down if the editor
3586                                 // breaks one of the entities whilst editing.
3587                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) and ( strlen( $hexstring ) <= 6 ) ) {
3588                                         $codepoint = hexdec( $hexstring );
3589                                         $result .= codepointToUtf8( $codepoint );
3590                                 } else {
3591                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
3592                                 }
3593                         } else {
3594                                 $result .= substr( $invalue, $i, 1 );
3595                         }
3596                 }
3597                 // reverse the transform that we made for reversability reasons.
3598                 return strtr( $result, array( "&#x0" => "&#x" ) );
3599         }
3600 }