includes/EditPage.php

   1 <?php
   2 /**
   3  * Contains the EditPage class
   4  * @file
   5  */
   6
   7 /**
   8  * The edit page/HTML interface (split from Article)
   9  * The actual database and text munging is still in Article,
  10  * but it should get easier to call those from alternate
  11  * interfaces.
  12  *
  13  * EditPage cares about two distinct titles:
  14  * $this->mContextTitle is the page that forms submit to, links point to,
  15  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  16  * page in the database that is actually being edited. These are
  17  * usually the same, but they are now allowed to be different.
  18  *
  19  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  20  * headaches, which may be fatal.
  21  */
  22 class EditPage {
  23
  24         /**
  25          * Status: Article successfully updated
  26          */
  27         const AS_SUCCESS_UPDATE            = 200;
  28
  29         /**
  30          * Status: Article successfully created
  31          */
  32         const AS_SUCCESS_NEW_ARTICLE       = 201;
  33
  34         /**
  35          * Status: Article update aborted by a hook function
  36          */
  37         const AS_HOOK_ERROR                = 210;
  38
  39         /**
  40          * Status: A hook function returned an error
  41          */
  42         const AS_HOOK_ERROR_EXPECTED       = 212;
  43
  44         /**
  45          * Status: User is blocked from editting this page
  46          */
  47         const AS_BLOCKED_PAGE_FOR_USER     = 215;
  48
  49         /**
  50          * Status: Content too big (> $wgMaxArticleSize)
  51          */
  52         const AS_CONTENT_TOO_BIG           = 216;
  53
  54         /**
  55          * Status: User cannot edit? (not used)
  56          */
  57         const AS_USER_CANNOT_EDIT          = 217;
  58
  59         /**
  60          * Status: this anonymous user is not allowed to edit this page
  61          */
  62         const AS_READ_ONLY_PAGE_ANON       = 218;
  63
  64         /**
  65          * Status: this logged in user is not allowed to edit this page
  66          */
  67         const AS_READ_ONLY_PAGE_LOGGED     = 219;
  68
  69         /**
  70          * Status: wiki is in readonly mode (wfReadOnly() == true)
  71          */
  72         const AS_READ_ONLY_PAGE            = 220;
  73
  74         /**
  75          * Status: rate limiter for action 'edit' was tripped
  76          */
  77         const AS_RATE_LIMITED              = 221;
  78
  79         /**
  80          * Status: article was deleted while editting and param wpRecreate == false or form
  81          * was not posted
  82          */
  83         const AS_ARTICLE_WAS_DELETED       = 222;
  84
  85         /**
  86          * Status: user tried to create this page, but is not allowed to do that
  87          * ( Title->usercan('create') == false )
  88          */
  89         const AS_NO_CREATE_PERMISSION      = 223;
  90
  91         /**
  92          * Status: user tried to create a blank page
  93          */
  94         const AS_BLANK_ARTICLE             = 224;
  95
  96         /**
  97          * Status: (non-resolvable) edit conflict
  98          */
  99         const AS_CONFLICT_DETECTED         = 225;
 100
 101         /**
 102          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 103          * editting in his own userspace or talkspace and wpIgnoreBlankSummary == false
 104          */
 105         const AS_SUMMARY_NEEDED            = 226;
 106
 107         /**
 108          * Status: user tried to create a new section without content
 109          */
 110         const AS_TEXTBOX_EMPTY             = 228;
 111
 112         /**
 113          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 114          */
 115         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 116
 117         /**
 118          * not used
 119          */
 120         const AS_OK                        = 230;
 121
 122         /**
 123          * Status: WikiPage::doEdit() was unsuccessfull
 124          */
 125         const AS_END                       = 231;
 126
 127         /**
 128          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 129          */
 130         const AS_SPAM_ERROR                = 232;
 131
 132         /**
 133          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 134          */
 135         const AS_IMAGE_REDIRECT_ANON       = 233;
 136
 137         /**
 138          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 139          */
 140         const AS_IMAGE_REDIRECT_LOGGED     = 234;
 141
 142         /**
 143          * Status: can't parse content
 144          */
 145         const AS_PARSE_ERROR                = 240;
 146
 147         /**
 148          * HTML id and name for the beginning of the edit form.
 149          */
 150         const EDITFORM_ID                  = 'editform';
 151
 152         /**
 153          * @var Article
 154          */
 155         var $mArticle;
 156
 157         /**
 158          * @var Title
 159          */
 160         var $mTitle;
 161         private $mContextTitle = null;
 162         var $action = 'submit';
 163         var $isConflict = false;
 164         var $isCssJsSubpage = false;
 165         var $isCssSubpage = false;
 166         var $isJsSubpage = false;
 167         var $isWrongCaseCssJsPage = false;
 168         var $isNew = false; // new page or new section
 169         var $deletedSinceEdit;
 170         var $formtype;
 171         var $firsttime;
 172         var $lastDelete;
 173         var $mTokenOk = false;
 174         var $mTokenOkExceptSuffix = false;
 175         var $mTriedSave = false;
 176         var $incompleteForm = false;
 177         var $tooBig = false;
 178         var $kblength = false;
 179         var $missingComment = false;
 180         var $missingSummary = false;
 181         var $allowBlankSummary = false;
 182         var $autoSumm = '';
 183         var $hookError = '';
 184         #var $mPreviewTemplates;
 185
 186         /**
 187          * @var ParserOutput
 188          */
 189         var $mParserOutput;
 190
 191         /**
 192          * Has a summary been preset using GET parameter &summary= ?
 193          * @var Bool
 194          */
 195         var $hasPresetSummary = false;
 196
 197         var $mBaseRevision = false;
 198         var $mShowSummaryField = true;
 199
 200         # Form values
 201         var $save = false, $preview = false, $diff = false;
 202         var $minoredit = false, $watchthis = false, $recreate = false;
 203         var $textbox1 = '', $textbox2 = '', $summary = '', $nosummary = false;
 204         var $edittime = '', $section = '', $sectiontitle = '', $starttime = '';
 205         var $oldid = 0, $editintro = '', $scrolltop = null, $bot = true;
 206         var $content_model = null, $content_format = null;
 207
 208         # Placeholders for text injection by hooks (must be HTML)
 209         # extensions should take care to _append_ to the present value
 210         public $editFormPageTop = ''; // Before even the preview
 211         public $editFormTextTop = '';
 212         public $editFormTextBeforeContent = '';
 213         public $editFormTextAfterWarn = '';
 214         public $editFormTextAfterTools = '';
 215         public $editFormTextBottom = '';
 216         public $editFormTextAfterContent = '';
 217         public $previewTextAfterContent = '';
 218         public $mPreloadContent = null;
 219
 220         /* $didSave should be set to true whenever an article was succesfully altered. */
 221         public $didSave = false;
 222         public $undidRev = 0;
 223
 224         public $suppressIntro = false;
 225
 226         /**
 227          * @param $article Article
 228          */
 229         public function __construct( Article $article ) {
 230                 $this->mArticle = $article;
 231                 $this->mTitle = $article->getTitle();
 232
 233                 $this->content_model = $this->mTitle->getContentModel();
 234
 235                 $handler = ContentHandler::getForModelID( $this->content_model );
 236                 $this->content_format = $handler->getDefaultFormat(); #NOTE: should be overridden by format of actual revision
 237         }
 238
 239         /**
 240          * @return Article
 241          */
 242         public function getArticle() {
 243                 return $this->mArticle;
 244         }
 245
 246         /**
 247          * @since 1.19
 248          * @return Title
 249          */
 250         public function getTitle() {
 251                 return $this->mTitle;
 252         }
 253
 254         /**
 255          * Set the context Title object
 256          *
 257          * @param $title Title object or null
 258          */
 259         public function setContextTitle( $title ) {
 260                 $this->mContextTitle = $title;
 261         }
 262
 263         /**
 264          * Get the context title object.
 265          * If not set, $wgTitle will be returned. This behavior might changed in
 266          * the future to return $this->mTitle instead.
 267          *
 268          * @return Title object
 269          */
 270         public function getContextTitle() {
 271                 if ( is_null( $this->mContextTitle ) ) {
 272                         global $wgTitle;
 273                         return $wgTitle;
 274                 } else {
 275                         return $this->mContextTitle;
 276                 }
 277         }
 278
 279         function submit() {
 280                 $this->edit();
 281         }
 282
 283         /**
 284          * This is the function that gets called for "action=edit". It
 285          * sets up various member variables, then passes execution to
 286          * another function, usually showEditForm()
 287          *
 288          * The edit form is self-submitting, so that when things like
 289          * preview and edit conflicts occur, we get the same form back
 290          * with the extra stuff added.  Only when the final submission
 291          * is made and all is well do we actually save and redirect to
 292          * the newly-edited page.
 293          */
 294         function edit() {
 295                 global $wgOut, $wgRequest, $wgUser;
 296                 // Allow extensions to modify/prevent this form or submission
 297                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 298                         return;
 299                 }
 300
 301                 wfProfileIn( __METHOD__ );
 302                 wfDebug( __METHOD__ . ": enter\n" );
 303
 304                 // If they used redlink=1 and the page exists, redirect to the main article
 305                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 306                         $wgOut->redirect( $this->mTitle->getFullURL() );
 307                         wfProfileOut( __METHOD__ );
 308                         return;
 309                 }
 310
 311                 $this->importFormData( $wgRequest );
 312                 $this->firsttime = false;
 313
 314                 if ( $this->live ) {
 315                         $this->livePreview();
 316                         wfProfileOut( __METHOD__ );
 317                         return;
 318                 }
 319
 320                 if ( wfReadOnly() && $this->save ) {
 321                         // Force preview
 322                         $this->save = false;
 323                         $this->preview = true;
 324                 }
 325
 326                 if ( $this->save ) {
 327                         $this->formtype = 'save';
 328                 } elseif ( $this->preview ) {
 329                         $this->formtype = 'preview';
 330                 } elseif ( $this->diff ) {
 331                         $this->formtype = 'diff';
 332                 } else { # First time through
 333                         $this->firsttime = true;
 334                         if ( $this->previewOnOpen() ) {
 335                                 $this->formtype = 'preview';
 336                         } else {
 337                                 $this->formtype = 'initial';
 338                         }
 339                 }
 340
 341                 $permErrors = $this->getEditPermissionErrors();
 342                 if ( $permErrors ) {
 343                         wfDebug( __METHOD__ . ": User can't edit\n" );
 344                         // Auto-block user's IP if the account was "hard" blocked
 345                         $wgUser->spreadAnyEditBlock();
 346
 347                         $this->displayPermissionsError( $permErrors );
 348
 349                         wfProfileOut( __METHOD__ );
 350                         return;
 351                 }
 352
 353                 wfProfileIn( __METHOD__ . "-business-end" );
 354
 355                 $this->isConflict = false;
 356                 // css / js subpages of user pages get a special treatment
 357                 $this->isCssJsSubpage       = $this->mTitle->isCssJsSubpage();
 358                 $this->isCssSubpage         = $this->mTitle->isCssSubpage();
 359                 $this->isJsSubpage          = $this->mTitle->isJsSubpage();
 360                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 361                 $this->isNew                = !$this->mTitle->exists() || $this->section == 'new';
 362
 363                 # Show applicable editing introductions
 364                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 365                         $this->showIntro();
 366                 }
 367
 368                 # Attempt submission here.  This will check for edit conflicts,
 369                 # and redundantly check for locked database, blocked IPs, etc.
 370                 # that edit() already checked just in case someone tries to sneak
 371                 # in the back door with a hand-edited submission URL.
 372
 373                 if ( 'save' == $this->formtype ) {
 374                         if ( !$this->attemptSave() ) {
 375                                 wfProfileOut( __METHOD__ . "-business-end" );
 376                                 wfProfileOut( __METHOD__ );
 377                                 return;
 378                         }
 379                 }
 380
 381                 # First time through: get contents, set time for conflict
 382                 # checking, etc.
 383                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 384                         if ( $this->initialiseForm() === false ) {
 385                                 $this->noSuchSectionPage();
 386                                 wfProfileOut( __METHOD__ . "-business-end" );
 387                                 wfProfileOut( __METHOD__ );
 388                                 return;
 389                         }
 390                         if ( !$this->mTitle->getArticleID() )
 391                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 392                         else
 393                                 wfRunHooks( 'EditFormInitialText', array( $this ) );
 394                 }
 395
 396                 $this->showEditForm();
 397                 wfProfileOut( __METHOD__ . "-business-end" );
 398                 wfProfileOut( __METHOD__ );
 399         }
 400
 401         /**
 402          * @return array
 403          */
 404         protected function getEditPermissionErrors() {
 405                 global $wgUser;
 406                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 407                 # Can this title be created?
 408                 if ( !$this->mTitle->exists() ) {
 409                         $permErrors = array_merge( $permErrors,
 410                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 411                 }
 412                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 413                 $remove = array();
 414                 foreach ( $permErrors as $error ) {
 415                         if ( ( $this->preview || $this->diff ) &&
 416                                 ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' ) )
 417                         {
 418                                 $remove[] = $error;
 419                         }
 420                 }
 421                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 422                 return $permErrors;
 423         }
 424
 425         /**
 426          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 427          * but with the following differences:
 428          * - If redlink=1, the user will be redirected to the page
 429          * - If there is content to display or the error occurs while either saving,
 430          *   previewing or showing the difference, it will be a
 431          *   "View source for ..." page displaying the source code after the error message.
 432          *
 433          * @since 1.19
 434          * @param $permErrors Array of permissions errors, as returned by
 435          *                    Title::getUserPermissionsErrors().
 436          */
 437         protected function displayPermissionsError( array $permErrors ) {
 438                 global $wgRequest, $wgOut;
 439
 440                 if ( $wgRequest->getBool( 'redlink' ) ) {
 441                         // The edit page was reached via a red link.
 442                         // Redirect to the article page and let them click the edit tab if
 443                         // they really want a permission error.
 444                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 445                         return;
 446                 }
 447
 448                 $content = $this->getContentObject();
 449
 450                 # Use the normal message if there's nothing to display
 451                 if ( $this->firsttime && $content->isEmpty() ) {
 452                         $action = $this->mTitle->exists() ? 'edit' :
 453                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 454                         throw new PermissionsError( $action, $permErrors );
 455                 }
 456
 457                 $wgOut->setPageTitle( wfMessage( 'viewsource-title', $this->getContextTitle()->getPrefixedText() ) );
 458                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 459                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 460                 $wgOut->addHTML( "<hr />\n" );
 461
 462                 # If the user made changes, preserve them when showing the markup
 463                 # (This happens when a user is blocked during edit, for instance)
 464                 if ( !$this->firsttime ) {
 465                         $text = $this->textbox1;
 466                         $wgOut->addWikiMsg( 'viewyourtext' );
 467                 } else {
 468                         $text = $content->serialize( $this->content_format );
 469                         $wgOut->addWikiMsg( 'viewsourcetext' );
 470                 }
 471
 472                 $this->showTextbox( $text, 'wpTextbox1', array( 'readonly' ) );
 473
 474                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 475                         Linker::formatTemplates( $this->getTemplates() ) ) );
 476
 477                 if ( $this->mTitle->exists() ) {
 478                         $wgOut->returnToMain( null, $this->mTitle );
 479                 }
 480         }
 481
 482         /**
 483          * Show a read-only error
 484          * Parameters are the same as OutputPage:readOnlyPage()
 485          * Redirect to the article page if redlink=1
 486          * @deprecated in 1.19; use displayPermissionsError() instead
 487          */
 488         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 489                 wfDeprecated( __METHOD__, '1.19' );
 490
 491                 global $wgRequest, $wgOut;
 492                 if ( $wgRequest->getBool( 'redlink' ) ) {
 493                         // The edit page was reached via a red link.
 494                         // Redirect to the article page and let them click the edit tab if
 495                         // they really want a permission error.
 496                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 497                 } else {
 498                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 499                 }
 500         }
 501
 502         /**
 503          * Should we show a preview when the edit form is first shown?
 504          *
 505          * @return bool
 506          */
 507         protected function previewOnOpen() {
 508                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 509                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 510                         // Explicit override from request
 511                         return true;
 512                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 513                         // Explicit override from request
 514                         return false;
 515                 } elseif ( $this->section == 'new' ) {
 516                         // Nothing *to* preview for new sections
 517                         return false;
 518                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 519                         // Standard preference behaviour
 520                         return true;
 521                 } elseif ( !$this->mTitle->exists() &&
 522                   isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] ) &&
 523                   $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 524                 {
 525                         // Categories are special
 526                         return true;
 527                 } else {
 528                         return false;
 529                 }
 530         }
 531
 532         /**
 533          * Checks whether the user entered a skin name in uppercase,
 534          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 535          *
 536          * @return bool
 537          */
 538         protected function isWrongCaseCssJsPage() {
 539                 if ( $this->mTitle->isCssJsSubpage() ) {
 540                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 541                         $skins = array_merge(
 542                                 array_keys( Skin::getSkinNames() ),
 543                                 array( 'common' )
 544                         );
 545                         return !in_array( $name, $skins )
 546                                 && in_array( strtolower( $name ), $skins );
 547                 } else {
 548                         return false;
 549                 }
 550         }
 551
 552         /**
 553          * Does this EditPage class support section editing?
 554          * This is used by EditPage subclasses to indicate their ui cannot handle section edits
 555          *
 556          * @return bool
 557          */
 558         protected function isSectionEditSupported() {
 559                 return true;
 560         }
 561
 562         /**
 563          * This function collects the form data and uses it to populate various member variables.
 564          * @param $request WebRequest
 565          */
 566         function importFormData( &$request ) {
 567                 global $wgLang, $wgUser;
 568
 569                 wfProfileIn( __METHOD__ );
 570
 571                 # Section edit can come from either the form or a link
 572                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 573
 574                 if ( $request->wasPosted() ) {
 575                         # These fields need to be checked for encoding.
 576                         # Also remove trailing whitespace, but don't remove _initial_
 577                         # whitespace from the text boxes. This may be significant formatting.
 578                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 579                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 580                                 // Skip this if wpTextbox2 has input, it indicates that we came
 581                                 // from a conflict page with raw page text, not a custom form
 582                                 // modified by subclasses
 583                                 wfProfileIn( get_class( $this ) . "::importContentFormData" );
 584                                 $textbox1 = $this->importContentFormData( $request );
 585                                 if ( isset( $textbox1 ) )
 586                                         $this->textbox1 = $textbox1;
 587                                 wfProfileOut( get_class( $this ) . "::importContentFormData" );
 588                         }
 589
 590                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 591                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary' ), 250 );
 592
 593                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 594                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 595                         # section titles.
 596                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 597
 598                         # Treat sectiontitle the same way as summary.
 599                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 600                         # currently doing double duty as both edit summary and section title. Right now this
 601                         # is just to allow API edits to work around this limitation, but this should be
 602                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 603                         $this->sectiontitle = $wgLang->truncate( $request->getText( 'wpSectionTitle' ), 250 );
 604                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 605
 606                         $this->edittime = $request->getVal( 'wpEdittime' );
 607                         $this->starttime = $request->getVal( 'wpStarttime' );
 608
 609                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 610
 611                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 612                                 // wpTextbox1 field is missing, possibly due to being "too big"
 613                                 // according to some filter rules such as Suhosin's setting for
 614                                 // suhosin.request.max_value_length (d'oh)
 615                                 $this->incompleteForm = true;
 616                         } else {
 617                                 // edittime should be one of our last fields; if it's missing,
 618                                 // the submission probably broke somewhere in the middle.
 619                                 $this->incompleteForm = is_null( $this->edittime );
 620                         }
 621                         if ( $this->incompleteForm ) {
 622                                 # If the form is incomplete, force to preview.
 623                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 624                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 625                                 $this->preview = true;
 626                         } else {
 627                                 /* Fallback for live preview */
 628                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 629                                 $this->diff = $request->getCheck( 'wpDiff' );
 630
 631                                 // Remember whether a save was requested, so we can indicate
 632                                 // if we forced preview due to session failure.
 633                                 $this->mTriedSave = !$this->preview;
 634
 635                                 if ( $this->tokenOk( $request ) ) {
 636                                         # Some browsers will not report any submit button
 637                                         # if the user hits enter in the comment box.
 638                                         # The unmarked state will be assumed to be a save,
 639                                         # if the form seems otherwise complete.
 640                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 641                                 } elseif ( $this->diff ) {
 642                                         # Failed token check, but only requested "Show Changes".
 643                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 644                                 } else {
 645                                         # Page might be a hack attempt posted from
 646                                         # an external site. Preview instead of saving.
 647                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 648                                         $this->preview = true;
 649                                 }
 650                         }
 651                         $this->save = !$this->preview && !$this->diff;
 652                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 653                                 $this->edittime = null;
 654                         }
 655
 656                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 657                                 $this->starttime = null;
 658                         }
 659
 660                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 661
 662                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 663                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 664
 665                         # Don't force edit summaries when a user is editing their own user or talk page
 666                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 667                                 $this->mTitle->getText() == $wgUser->getName() )
 668                         {
 669                                 $this->allowBlankSummary = true;
 670                         } else {
 671                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary' );
 672                         }
 673
 674                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 675                 } else {
 676                         # Not a posted form? Start with nothing.
 677                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 678                         $this->textbox1     = ''; #FIXME: track content object
 679                         $this->summary      = '';
 680                         $this->sectiontitle = '';
 681                         $this->edittime     = '';
 682                         $this->starttime    = wfTimestampNow();
 683                         $this->edit         = false;
 684                         $this->preview      = false;
 685                         $this->save         = false;
 686                         $this->diff         = false;
 687                         $this->minoredit    = false;
 688                         $this->watchthis    = $request->getBool( 'watchthis', false ); // Watch may be overriden by request parameters
 689                         $this->recreate     = false;
 690
 691                         // When creating a new section, we can preload a section title by passing it as the
 692                         // preloadtitle parameter in the URL (Bug 13100)
 693                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 694                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 695                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 696                                 $this->summary = $request->getVal( 'preloadtitle' );
 697                         }
 698                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 699                                 $this->summary = $request->getText( 'summary' );
 700                                 if ( $this->summary !== '' ) {
 701                                         $this->hasPresetSummary = true;
 702                                 }
 703                         }
 704
 705                         if ( $request->getVal( 'minor' ) ) {
 706                                 $this->minoredit = true;
 707                         }
 708                 }
 709
 710                 $this->oldid = $request->getInt( 'oldid' );
 711
 712                 $this->bot = $request->getBool( 'bot', true );
 713                 $this->nosummary = $request->getBool( 'nosummary' );
 714
 715                 $content_handler = ContentHandler::getForTitle( $this->mTitle );
 716                 $this->content_model = $request->getText( 'model', $content_handler->getModelID() ); #may be overridden by revision
 717                 $this->content_format = $request->getText( 'format', $content_handler->getDefaultFormat() ); #may be overridden by revision
 718
 719                 #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
 720                 #TODO: check if the desired content model supports the given content format!
 721
 722                 $this->live = $request->getCheck( 'live' );
 723                 $this->editintro = $request->getText( 'editintro',
 724                         // Custom edit intro for new sections
 725                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 726
 727                 // Allow extensions to modify form data
 728                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 729
 730                 wfProfileOut( __METHOD__ );
 731         }
 732
 733         /**
 734          * Subpage overridable method for extracting the page content data from the
 735          * posted form to be placed in $this->textbox1, if using customized input
 736          * this method should be overrided and return the page text that will be used
 737          * for saving, preview parsing and so on...
 738          *
 739          * @param $request WebRequest
 740          */
 741         protected function importContentFormData( &$request ) {
 742                 return; // Don't do anything, EditPage already extracted wpTextbox1
 743         }
 744
 745         /**
 746          * Initialise form fields in the object
 747          * Called on the first invocation, e.g. when a user clicks an edit link
 748          * @return bool -- if the requested section is valid
 749          */
 750         function initialiseForm() {
 751                 global $wgUser;
 752                 $this->edittime = $this->mArticle->getTimestamp();
 753
 754                 $content = $this->getContentObject( false ); #TODO: track content object?!
 755                 $this->textbox1 = $content->serialize( $this->content_format );
 756
 757                 // activate checkboxes if user wants them to be always active
 758                 # Sort out the "watch" checkbox
 759                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 760                         # Watch all edits
 761                         $this->watchthis = true;
 762                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 763                         # Watch creations
 764                         $this->watchthis = true;
 765                 } elseif ( $this->mTitle->userIsWatching() ) {
 766                         # Already watched
 767                         $this->watchthis = true;
 768                 }
 769                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 770                         $this->minoredit = true;
 771                 }
 772                 if ( $this->textbox1 === false ) {
 773                         return false;
 774                 }
 775                 wfProxyCheck();
 776                 return true;
 777         }
 778
 779         /**
 780          * Fetch initial editing page content.
 781          *
 782          * @param $def_text string
 783          * @return mixed string on success, $def_text for invalid sections
 784          * @private
 785          * @deprecated since 1.WD
 786          */
 787         function getContent( $def_text = false ) { #FIXME: deprecated, replace usage!
 788                 wfDeprecated( __METHOD__, '1.WD' );
 789
 790                 if ( $def_text !== null && $def_text !== false && $def_text !== '' ) {
 791                         $def_content = ContentHandler::makeContent( $def_text, $this->getTitle() );
 792                 } else {
 793                         $def_content = false;
 794                 }
 795
 796                 $content = $this->getContentObject( $def_content );
 797
 798                 return $content->serialize( $this->content_format ); #XXX: really use serialized form? use ContentHandler::getContentText() instead?
 799         }
 800
 801         private function getContentObject( $def_content = null ) { #FIXME: use this!
 802                 global $wgOut, $wgRequest;
 803
 804                 wfProfileIn( __METHOD__ );
 805
 806                 $content = false;
 807
 808                 // For message page not locally set, use the i18n message.
 809                 // For other non-existent articles, use preload text if any.
 810                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
 811                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
 812                                 # If this is a system message, get the default text.
 813                                 $msg = $this->mTitle->getDefaultMessageText();
 814
 815                                 $content = ContentHandler::makeContent( $msg, $this->mTitle );
 816                         }
 817                         if ( $content === false ) {
 818                                 # If requested, preload some text.
 819                                 $preload = $wgRequest->getVal( 'preload',
 820                                         // Custom preload text for new sections
 821                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 822
 823                                 $content = $this->getPreloadedContent( $preload );
 824                         }
 825                 // For existing pages, get text based on "undo" or section parameters.
 826                 } else {
 827                         if ( $this->section != '' ) {
 828                                 // Get section edit text (returns $def_text for invalid sections)
 829                                 $orig = $this->getOriginalContent();
 830                                 $content = $orig ? $orig->getSection( $this->section ) : null;
 831
 832                                 if ( !$content ) $content = $def_content;
 833                         } else {
 834                                 $undoafter = $wgRequest->getInt( 'undoafter' );
 835                                 $undo = $wgRequest->getInt( 'undo' );
 836
 837                                 if ( $undo > 0 && $undoafter > 0 ) {
 838                                         if ( $undo < $undoafter ) {
 839                                                 # If they got undoafter and undo round the wrong way, switch them
 840                                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 841                                         }
 842
 843                                         $undorev = Revision::newFromId( $undo );
 844                                         $oldrev = Revision::newFromId( $undoafter );
 845
 846                                         # Sanity check, make sure it's the right page,
 847                                         # the revisions exist and they were not deleted.
 848                                         # Otherwise, $content will be left as-is.
 849                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 850                                                 $undorev->getPage() == $oldrev->getPage() &&
 851                                                 $undorev->getPage() == $this->mTitle->getArticleID() &&
 852                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 853                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 854
 855                                                 $content = $this->mArticle->getUndoContent( $undorev, $oldrev );
 856
 857                                                 if ( $content === false ) {
 858                                                         # Warn the user that something went wrong
 859                                                         $undoMsg = 'failure';
 860                                                 } else {
 861                                                         # Inform the user of our success and set an automatic edit summary
 862                                                         $undoMsg = 'success';
 863
 864                                                         # If we just undid one rev, use an autosummary
 865                                                         $firstrev = $oldrev->getNext();
 866                                                         if ( $firstrev && $firstrev->getId() == $undo ) {
 867                                                                 $undoSummary = wfMsgForContent( 'undo-summary', $undo, $undorev->getUserText() );
 868                                                                 if ( $this->summary === '' ) {
 869                                                                         $this->summary = $undoSummary;
 870                                                                 } else {
 871                                                                         $this->summary = $undoSummary . wfMsgForContent( 'colon-separator' ) . $this->summary;
 872                                                                 }
 873                                                                 $this->undidRev = $undo;
 874                                                         }
 875                                                         $this->formtype = 'diff';
 876                                                 }
 877                                         } else {
 878                                                 // Failed basic sanity checks.
 879                                                 // Older revisions may have been removed since the link
 880                                                 // was created, or we may simply have got bogus input.
 881                                                 $undoMsg = 'norev';
 882                                         }
 883
 884                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
 885                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
 886                                                 wfMsgNoTrans( 'undo-' . $undoMsg ) . '</div>', true, /* interface */true );
 887                                 }
 888
 889                                 if ( $content === false ) {
 890                                         $content = $this->getOriginalContent();
 891                                 }
 892                         }
 893                 }
 894
 895                 wfProfileOut( __METHOD__ );
 896                 return $content;
 897         }
 898
 899         /**
 900          * Get the content of the wanted revision, without section extraction.
 901          *
 902          * The result of this function can be used to compare user's input with
 903          * section replaced in its context (using WikiPage::replaceSection())
 904          * to the original text of the edit.
 905          *
 906          * This difers from Article::getContent() that when a missing revision is
 907          * encountered the result will be an empty string and not the
 908          * 'missing-article' message.
 909          *
 910          * @since 1.19
 911          * @return string
 912          */
 913         private function getOriginalContent() {
 914                 if ( $this->section == 'new' ) {
 915                         return $this->getCurrentContent();
 916                 }
 917                 $revision = $this->mArticle->getRevisionFetched();
 918                 if ( $revision === null ) {
 919                         if ( !$this->content_model ) $this->content_model = $this->getTitle()->getContentModel();
 920                         $handler = ContentHandler::getForModelID( $this->content_model );
 921
 922                         return $handler->makeEmptyContent();
 923                 }
 924                 $content = $revision->getContent();
 925                 return $content;
 926         }
 927
 928         /**
 929          * Get the current content of the page. This is basically similar to
 930          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
 931          * content object is returned instead of null.
 932          *
 933          * @since 1.WD
 934          * @return string
 935          */
 936         private function getCurrentContent() {
 937                 $rev = $this->mArticle->getRevision();
 938                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
 939
 940                 if ( $content  === false || $content === null ) {
 941                         if ( !$this->content_model ) $this->content_model = $this->getTitle()->getContentModel();
 942                         $handler = ContentHandler::getForModelID( $this->content_model );
 943
 944                         return $handler->makeEmptyContent();
 945                 } else {
 946                         #FIXME: nasty side-effect!
 947                         $this->content_model = $rev->getContentModel();
 948                         $this->content_format = $rev->getContentFormat();
 949
 950                         return $content;
 951                 }
 952         }
 953
 954
 955         /**
 956          * Use this method before edit() to preload some text into the edit box
 957          *
 958          * @param $text string
 959          * @deprecated since 1.WD
 960          */
 961         public function setPreloadedText( $text ) {
 962                 wfDeprecated( __METHOD__, "1.WD" );
 963
 964                 $content = ContentHandler::makeContent( $text, $this->getTitle() );
 965
 966                 $this->setPreloadedContent( $content );
 967         }
 968
 969         /**
 970          * Use this method before edit() to preload some content into the edit box
 971          *
 972          * @param $content Content
 973          *
 974          * @since 1.WD
 975          */
 976         public function setPreloadedContent( Content $content ) {
 977                 $this->mPreloadedContent = $content;
 978         }
 979
 980         /**
 981          * Get the contents to be preloaded into the box, either set by
 982          * an earlier setPreloadText() or by loading the given page.
 983          *
 984          * @param $preload String: representing the title to preload from.
 985          *
 986          * @return String
 987          *
 988          * @deprecated since 1.WD, use getPreloadedContent() instead
 989          */
 990         protected function getPreloadedText( $preload ) { #NOTE: B/C only, replace usage!
 991                 wfDeprecated( __METHOD__, "1.WD" );
 992
 993                 $content = $this->getPreloadedContent( $preload );
 994                 $text = $content->serialize( $this->content_format ); #XXX: really use serialized form? use ContentHandler::getContentText() instead?!
 995
 996                 return $text;
 997         }
 998
 999         /**
1000          * Get the contents to be preloaded into the box, either set by
1001          * an earlier setPreloadText() or by loading the given page.
1002          *
1003          * @param $preload String: representing the title to preload from.
1004          *
1005          * @return Content
1006          *
1007          * @since 1.WD
1008          */
1009         protected function getPreloadedContent( $preload ) { #@todo: use this!
1010                 global $wgUser;
1011
1012                 if ( !empty( $this->mPreloadContent ) ) {
1013                         return $this->mPreloadContent;
1014                 }
1015
1016                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1017
1018                 if ( $preload === '' ) {
1019                         return $handler->makeEmptyContent();
1020                 }
1021
1022                 $title = Title::newFromText( $preload );
1023                 # Check for existence to avoid getting MediaWiki:Noarticletext
1024                 if ( $title === null || !$title->exists() || !$title->userCan( 'read' ) ) {
1025                         return $handler->makeEmptyContent();
1026                 }
1027
1028                 $page = WikiPage::factory( $title );
1029                 if ( $page->isRedirect() ) {
1030                         $title = $page->getRedirectTarget();
1031                         # Same as before
1032                         if ( $title === null || !$title->exists() || !$title->userCan( 'read' ) ) {
1033                                 return $handler->makeEmptyContent();
1034                         }
1035                         $page = WikiPage::factory( $title );
1036                 }
1037
1038                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1039                 $content = $page->getContent( Revision::RAW );
1040
1041                 return $content->preloadTransform( $title, $parserOptions );
1042         }
1043
1044         /**
1045          * Make sure the form isn't faking a user's credentials.
1046          *
1047          * @param $request WebRequest
1048          * @return bool
1049          * @private
1050          */
1051         function tokenOk( &$request ) {
1052                 global $wgUser;
1053                 $token = $request->getVal( 'wpEditToken' );
1054                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1055                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1056                 return $this->mTokenOk;
1057         }
1058
1059         /**
1060          * Attempt submission
1061          * @return bool false if output is done, true if the rest of the form should be displayed
1062          */
1063         function attemptSave() {
1064                 global $wgUser, $wgOut;
1065
1066                 $resultDetails = false;
1067                 # Allow bots to exempt some edits from bot flagging
1068                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1069                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1070                 // FIXME: once the interface for internalAttemptSave() is made nicer, this should use the message in $status
1071
1072                 if ( $status->value == self::AS_SUCCESS_UPDATE || $status->value == self::AS_SUCCESS_NEW_ARTICLE ) {
1073                         $this->didSave = true;
1074                 }
1075
1076                 switch ( $status->value ) {
1077                         case self::AS_HOOK_ERROR_EXPECTED:
1078                         case self::AS_CONTENT_TOO_BIG:
1079                         case self::AS_ARTICLE_WAS_DELETED:
1080                         case self::AS_CONFLICT_DETECTED:
1081                         case self::AS_SUMMARY_NEEDED:
1082                         case self::AS_TEXTBOX_EMPTY:
1083                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1084                         case self::AS_END:
1085                                 return true;
1086
1087                         case self::AS_HOOK_ERROR:
1088                                 return false;
1089
1090                         case self::AS_PARSE_ERROR:
1091                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>');
1092                                 #FIXME: cause editform to be shown again, not just an error!
1093                                 return false;
1094
1095                         case self::AS_SUCCESS_NEW_ARTICLE:
1096                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1097                                 $anchor = isset ( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1098                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1099                                 return false;
1100
1101                         case self::AS_SUCCESS_UPDATE:
1102                                 $extraQuery = '';
1103                                 $sectionanchor = $resultDetails['sectionanchor'];
1104
1105                                 // Give extensions a chance to modify URL query on update
1106                                 wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this->mArticle, &$sectionanchor, &$extraQuery ) );
1107
1108                                 if ( $resultDetails['redirect'] ) {
1109                                         if ( $extraQuery == '' ) {
1110                                                 $extraQuery = 'redirect=no';
1111                                         } else {
1112                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1113                                         }
1114                                 }
1115                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1116                                 return false;
1117
1118                         case self::AS_BLANK_ARTICLE:
1119                                 $wgOut->redirect( $this->getContextTitle()->getFullURL() );
1120                                 return false;
1121
1122                         case self::AS_SPAM_ERROR:
1123                                 $this->spamPageWithContent( $resultDetails['spam'] );
1124                                 return false;
1125
1126                         case self::AS_BLOCKED_PAGE_FOR_USER:
1127                                 throw new UserBlockedError( $wgUser->getBlock() );
1128
1129                         case self::AS_IMAGE_REDIRECT_ANON:
1130                         case self::AS_IMAGE_REDIRECT_LOGGED:
1131                                 throw new PermissionsError( 'upload' );
1132
1133                         case self::AS_READ_ONLY_PAGE_ANON:
1134                         case self::AS_READ_ONLY_PAGE_LOGGED:
1135                                 throw new PermissionsError( 'edit' );
1136
1137                         case self::AS_READ_ONLY_PAGE:
1138                                 throw new ReadOnlyError;
1139
1140                         case self::AS_RATE_LIMITED:
1141                                 throw new ThrottledError();
1142
1143                         case self::AS_NO_CREATE_PERMISSION:
1144                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1145                                 throw new PermissionsError( $permission );
1146
1147                 }
1148                 return false;
1149         }
1150
1151         /**
1152          * Attempt submission (no UI)
1153          *
1154          * @param $result
1155          * @param $bot bool
1156          *
1157          * @return Status object, possibly with a message, but always with one of the AS_* constants in $status->value,
1158          *
1159          * FIXME: This interface is TERRIBLE, but hard to get rid of due to various error display idiosyncrasies. There are
1160          * also lots of cases where error metadata is set in the object and retrieved later instead of being returned, e.g.
1161          * AS_CONTENT_TOO_BIG and AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some time.
1162          */
1163         function internalAttemptSave( &$result, $bot = false ) {
1164                 global $wgUser, $wgRequest, $wgParser, $wgMaxArticleSize;
1165
1166                 $status = Status::newGood();
1167
1168                 wfProfileIn( __METHOD__  );
1169                 wfProfileIn( __METHOD__ . '-checks' );
1170
1171                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
1172                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1173                         $status->fatal( 'hookaborted' );
1174                         $status->value = self::AS_HOOK_ERROR;
1175                         wfProfileOut( __METHOD__ . '-checks' );
1176                         wfProfileOut( __METHOD__  );
1177                         return $status;
1178                 }
1179
1180                 # Check image redirect
1181                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1182                         Title::newFromRedirect( $this->textbox1 ) instanceof Title && #FIXME: use content handler to check for redirect
1183                         !$wgUser->isAllowed( 'upload' ) ) {
1184                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1185                                 $status->setResult( false, $code );
1186
1187                                 wfProfileOut( __METHOD__ . '-checks' );
1188                                 wfProfileOut( __METHOD__  );
1189
1190                                 return $status;
1191                 }
1192
1193                 # Check for spam
1194                 $match = self::matchSummarySpamRegex( $this->summary );
1195                 if ( $match === false ) {
1196                         $match = self::matchSpamRegex( $this->textbox1 );
1197                 }
1198                 if ( $match !== false ) {
1199                         $result['spam'] = $match;
1200                         $ip = $wgRequest->getIP();
1201                         $pdbk = $this->mTitle->getPrefixedDBkey();
1202                         $match = str_replace( "\n", '', $match );
1203                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1204                         $status->fatal( 'spamprotectionmatch', $match );
1205                         $status->value = self::AS_SPAM_ERROR;
1206                         wfProfileOut( __METHOD__ . '-checks' );
1207                         wfProfileOut( __METHOD__ );
1208                         return $status;
1209                 }
1210                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
1211                         # Error messages etc. could be handled within the hook...
1212                         $status->fatal( 'hookaborted' );
1213                         $status->value = self::AS_HOOK_ERROR;
1214                         wfProfileOut( __METHOD__ . '-checks' );
1215                         wfProfileOut( __METHOD__ );
1216                         return $status;
1217                 } elseif ( $this->hookError != '' ) {
1218                         # ...or the hook could be expecting us to produce an error
1219                         $status->fatal( 'hookaborted' );
1220                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1221                         wfProfileOut( __METHOD__ . '-checks' );
1222                         wfProfileOut( __METHOD__ );
1223                         return $status;
1224                 }
1225
1226                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1227                         // Auto-block user's IP if the account was "hard" blocked
1228                         $wgUser->spreadAnyEditBlock();
1229                         # Check block state against master, thus 'false'.
1230                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1231                         wfProfileOut( __METHOD__ . '-checks' );
1232                         wfProfileOut( __METHOD__ );
1233                         return $status;
1234                 }
1235
1236                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1237                 if ( $this->kblength > $wgMaxArticleSize ) {
1238                         // Error will be displayed by showEditForm()
1239                         $this->tooBig = true;
1240                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1241                         wfProfileOut( __METHOD__ . '-checks' );
1242                         wfProfileOut( __METHOD__ );
1243                         return $status;
1244                 }
1245
1246                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1247                         if ( $wgUser->isAnon() ) {
1248                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1249                                 wfProfileOut( __METHOD__ . '-checks' );
1250                                 wfProfileOut( __METHOD__ );
1251                                 return $status;
1252                         } else {
1253                                 $status->fatal( 'readonlytext' );
1254                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1255                                 wfProfileOut( __METHOD__ . '-checks' );
1256                                 wfProfileOut( __METHOD__ );
1257                                 return $status;
1258                         }
1259                 }
1260
1261                 if ( wfReadOnly() ) {
1262                         $status->fatal( 'readonlytext' );
1263                         $status->value = self::AS_READ_ONLY_PAGE;
1264                         wfProfileOut( __METHOD__ . '-checks' );
1265                         wfProfileOut( __METHOD__ );
1266                         return $status;
1267                 }
1268                 if ( $wgUser->pingLimiter() ) {
1269                         $status->fatal( 'actionthrottledtext' );
1270                         $status->value = self::AS_RATE_LIMITED;
1271                         wfProfileOut( __METHOD__ . '-checks' );
1272                         wfProfileOut( __METHOD__ );
1273                         return $status;
1274                 }
1275
1276                 # If the article has been deleted while editing, don't save it without
1277                 # confirmation
1278                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1279                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1280                         wfProfileOut( __METHOD__ . '-checks' );
1281                         wfProfileOut( __METHOD__ );
1282                         return $status;
1283                 }
1284
1285                 wfProfileOut( __METHOD__ . '-checks' );
1286
1287                 // Use SELECT FOR UPDATE here to avoid transaction collision in
1288                 // WikiPage::updateRevisionOn() and ending in the self::AS_END case.
1289                 $this->mArticle->loadPageData( 'forupdate' );
1290                 $new = !$this->mArticle->exists();
1291
1292                 try {
1293                         if ( $new ) {
1294                                 // Late check for create permission, just in case *PARANOIA*
1295                                 if ( !$this->mTitle->userCan( 'create' ) ) {
1296                                         $status->fatal( 'nocreatetext' );
1297                                         $status->value = self::AS_NO_CREATE_PERMISSION;
1298                                         wfDebug( __METHOD__ . ": no create permission\n" );
1299                                         wfProfileOut( __METHOD__ );
1300                                         return $status;
1301                                 }
1302
1303                                 # Don't save a new article if it's blank.
1304                                 if ( $this->textbox1 == '' ) {
1305                                         $status->setResult( false, self::AS_BLANK_ARTICLE );
1306                                         wfProfileOut( __METHOD__ );
1307                                         return $status;
1308                                 }
1309
1310                                 // Run post-section-merge edit filter
1311                                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
1312                                         # Error messages etc. could be handled within the hook...
1313                                         $status->fatal( 'hookaborted' );
1314                                         $status->value = self::AS_HOOK_ERROR;
1315                                         wfProfileOut( __METHOD__ );
1316                                         return $status;
1317                                 } elseif ( $this->hookError != '' ) {
1318                                         # ...or the hook could be expecting us to produce an error
1319                                         $status->fatal( 'hookaborted' );
1320                                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1321                                         wfProfileOut( __METHOD__ );
1322                                         return $status;
1323                                 }
1324
1325                                 $content = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format );
1326
1327                                 $result['sectionanchor'] = '';
1328                                 if ( $this->section == 'new' ) {
1329                                         if ( $this->sectiontitle !== '' ) {
1330                                                 // Insert the section title above the content.
1331                                                 $content = $content->addSectionHeader( $this->sectiontitle );
1332
1333                                                 // Jump to the new section
1334                                                 $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1335
1336                                                 // If no edit summary was specified, create one automatically from the section
1337                                                 // title and have it link to the new section. Otherwise, respect the summary as
1338                                                 // passed.
1339                                                 if ( $this->summary === '' ) {
1340                                                         $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1341                                                         $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSectionTitle );
1342                                                 }
1343                                         } elseif ( $this->summary !== '' ) {
1344                                                 // Insert the section title above the content.
1345                                                 $content = $content->addSectionHeader( $this->sectiontitle );
1346
1347                                                 // Jump to the new section
1348                                                 $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1349
1350                                                 // Create a link to the new section from the edit summary.
1351                                                 $cleanSummary = $wgParser->stripSectionName( $this->summary );
1352                                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1353                                         }
1354                                 }
1355
1356                                 $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1357
1358                         } else { # not $new
1359
1360                                 # Article exists. Check for edit conflict.
1361
1362                                 $this->mArticle->clear(); # Force reload of dates, etc.
1363                                 $timestamp = $this->mArticle->getTimestamp();
1364
1365                                 wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1366
1367                                 if ( $timestamp != $this->edittime ) {
1368                                         $this->isConflict = true;
1369                                         if ( $this->section == 'new' ) {
1370                                                 if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1371                                                         $this->mArticle->getComment() == $this->summary ) {
1372                                                         // Probably a duplicate submission of a new comment.
1373                                                         // This can happen when squid resends a request after
1374                                                         // a timeout but the first one actually went through.
1375                                                         wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
1376                                                 } else {
1377                                                         // New comment; suppress conflict.
1378                                                         $this->isConflict = false;
1379                                                         wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1380                                                 }
1381                                         } elseif ( $this->section == '' && $this->userWasLastToEdit( $wgUser->getId(), $this->edittime ) ) {
1382                                                 # Suppress edit conflict with self, except for section edits where merging is required.
1383                                                 wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1384                                                 $this->isConflict = false;
1385                                         }
1386                                 }
1387
1388                                 // If sectiontitle is set, use it, otherwise use the summary as the section title (for
1389                                 // backwards compatibility with old forms/bots).
1390                                 if ( $this->sectiontitle !== '' ) {
1391                                         $sectionTitle = $this->sectiontitle;
1392                                 } else {
1393                                         $sectionTitle = $this->summary;
1394                                 }
1395
1396                                 $textbox_content = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format );
1397                                 $content = null;
1398
1399                                 if ( $this->isConflict ) {
1400                                         wfDebug( __METHOD__ . ": conflict! getting section '$this->section' for time '$this->edittime' (article time '{$timestamp}')\n" );
1401                                         $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle, $this->edittime );
1402                                 } else {
1403                                         wfDebug( __METHOD__ . ": getting section '$this->section'\n" );
1404                                         $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle );
1405                                 }
1406
1407                                 if ( is_null( $content ) ) {
1408                                         wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1409                                         $this->isConflict = true;
1410                                         $content = $textbox_content; // do not try to merge here!
1411                                 } elseif ( $this->isConflict ) {
1412                                         # Attempt merge
1413                                         if ( $this->mergeChangesIntoContent( $textbox_content ) ) {
1414                                                 // Successful merge! Maybe we should tell the user the good news?
1415                                                 $this->isConflict = false;
1416                                                 $content = $textbox_content;
1417                                                 wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1418                                         } else {
1419                                                 $this->section = '';
1420                                                 #$this->textbox1 = $text; #redundant, nothing to do here?
1421                                                 wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1422                                         }
1423                                 }
1424
1425                                 if ( $this->isConflict ) {
1426                                         $status->setResult( false, self::AS_CONFLICT_DETECTED );
1427                                         wfProfileOut( __METHOD__ );
1428                                         return $status;
1429                                 }
1430
1431                                 // Run post-section-merge edit filter
1432                                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $content->serialize( $this->content_format ), &$this->hookError, $this->summary ) )
1433                                                 || !wfRunHooks( 'EditFilterMergedContent', array( $this, $content, &$this->hookError, $this->summary ) ) ) {
1434                                         # Error messages etc. could be handled within the hook...
1435                                         $status->fatal( 'hookaborted' );
1436                                         $status->value = self::AS_HOOK_ERROR;
1437                                         wfProfileOut( __METHOD__ );
1438                                         return $status;
1439                                 } elseif ( $this->hookError != '' ) {
1440                                         # ...or the hook could be expecting us to produce an error
1441                                         $status->fatal( 'hookaborted' );
1442                                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1443                                         wfProfileOut( __METHOD__ );
1444                                         return $status;
1445                                 }
1446
1447                                 $content = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format );
1448
1449                                 # Handle the user preference to force summaries here, but not for null edits
1450                                 if ( $this->section != 'new' && !$this->allowBlankSummary
1451                                         && !$content->equals( $this->getOriginalContent() )
1452                                         && !$content->isRedirect() ) # check if it's not a redirect
1453                                 {
1454                                         if ( md5( $this->summary ) == $this->autoSumm ) {
1455                                                 $this->missingSummary = true;
1456                                                 $status->fatal( 'missingsummary' );
1457                                                 $status->value = self::AS_SUMMARY_NEEDED;
1458                                                 wfProfileOut( __METHOD__ );
1459                                                 return $status;
1460                                         }
1461                                 }
1462
1463                                 # And a similar thing for new sections
1464                                 if ( $this->section == 'new' && !$this->allowBlankSummary ) {
1465                                         if ( trim( $this->summary ) == '' ) {
1466                                                 $this->missingSummary = true;
1467                                                 $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1468                                                 $status->value = self::AS_SUMMARY_NEEDED;
1469                                                 wfProfileOut( __METHOD__ );
1470                                                 return $status;
1471                                         }
1472                                 }
1473
1474                                 # All's well
1475                                 wfProfileIn( __METHOD__ . '-sectionanchor' );
1476                                 $sectionanchor = '';
1477                                 if ( $this->section == 'new' ) {
1478                                         if ( $this->textbox1 == '' ) {
1479                                                 $this->missingComment = true;
1480                                                 $status->fatal( 'missingcommenttext' );
1481                                                 $status->value = self::AS_TEXTBOX_EMPTY;
1482                                                 wfProfileOut( __METHOD__ . '-sectionanchor' );
1483                                                 wfProfileOut( __METHOD__ );
1484                                                 return $status;
1485                                         }
1486                                         if ( $this->sectiontitle !== '' ) {
1487                                                 $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1488                                                 // If no edit summary was specified, create one automatically from the section
1489                                                 // title and have it link to the new section. Otherwise, respect the summary as
1490                                                 // passed.
1491                                                 if ( $this->summary === '' ) {
1492                                                         $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1493                                                         $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSectionTitle );
1494                                                 }
1495                                         } elseif ( $this->summary !== '' ) {
1496                                                 $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1497                                                 # This is a new section, so create a link to the new section
1498                                                 # in the revision summary.
1499                                                 $cleanSummary = $wgParser->stripSectionName( $this->summary );
1500                                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1501                                         }
1502                                 } elseif ( $this->section != '' ) {
1503                                         # Try to get a section anchor from the section source, redirect to edited section if header found
1504                                         # XXX: might be better to integrate this into Article::replaceSection
1505                                         # for duplicate heading checking and maybe parsing
1506                                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1507                                         # we can't deal with anchors, includes, html etc in the header for now,
1508                                         # headline would need to be parsed to improve this
1509                                         if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1510                                                 $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1511                                         }
1512                                 }
1513                                 $result['sectionanchor'] = $sectionanchor;
1514                                 wfProfileOut( __METHOD__ . '-sectionanchor' );
1515
1516                                 // Save errors may fall down to the edit form, but we've now
1517                                 // merged the section into full text. Clear the section field
1518                                 // so that later submission of conflict forms won't try to
1519                                 // replace that into a duplicated mess.
1520                                         $this->textbox1 = $content->serialize( $this->content_format );
1521                                 $this->section = '';
1522
1523                                 $status->value = self::AS_SUCCESS_UPDATE;
1524                         }
1525
1526                         // Check for length errors again now that the section is merged in
1527                                 $this->kblength = (int)( strlen( $content->serialize( $this->content_format ) ) / 1024 );
1528                         if ( $this->kblength > $wgMaxArticleSize ) {
1529                                 $this->tooBig = true;
1530                                 $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1531                                 wfProfileOut( __METHOD__ );
1532                                 return $status;
1533                         }
1534
1535                         $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1536                                 ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1537                                 ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1538                                 ( $bot ? EDIT_FORCE_BOT : 0 );
1539
1540                                 $doEditStatus = $this->mArticle->doEditContent( $content, $this->summary, $flags, false, null, $this->content_format );
1541
1542                         if ( $doEditStatus->isOK() ) {
1543                                         $result['redirect'] = $content->isRedirect();
1544                                 $this->commitWatch();
1545                                 wfProfileOut( __METHOD__ );
1546                                 return $status;
1547                         } else {
1548                                 $this->isConflict = true;
1549                                 $doEditStatus->value = self::AS_END; // Destroys data doEdit() put in $status->value but who cares
1550                                 wfProfileOut( __METHOD__ );
1551                                 return $doEditStatus;
1552                         }
1553                 } catch (MWContentSerializationException $ex) {
1554                         $status->fatal( 'content-failed-to-parse', $this->content_model, $this->content_format, $ex->getMessage() );
1555                         $status->value = self::AS_PARSE_ERROR;
1556                         wfProfileOut( __METHOD__ );
1557                         return $status;
1558                 }
1559         }
1560
1561         /**
1562          * Commit the change of watch status
1563          */
1564         protected function commitWatch() {
1565                 global $wgUser;
1566                 if ( $this->watchthis xor $this->mTitle->userIsWatching() ) {
1567                         $dbw = wfGetDB( DB_MASTER );
1568                         $dbw->begin( __METHOD__ );
1569                         if ( $this->watchthis ) {
1570                                 WatchAction::doWatch( $this->mTitle, $wgUser );
1571                         } else {
1572                                 WatchAction::doUnwatch( $this->mTitle, $wgUser );
1573                         }
1574                         $dbw->commit( __METHOD__ );
1575                 }
1576         }
1577
1578         /**
1579          * Check if no edits were made by other users since
1580          * the time a user started editing the page. Limit to
1581          * 50 revisions for the sake of performance.
1582          *
1583          * @param $id int
1584          * @param $edittime string
1585          *
1586          * @return bool
1587          */
1588         protected function userWasLastToEdit( $id, $edittime ) {
1589                 if ( !$id ) return false;
1590                 $dbw = wfGetDB( DB_MASTER );
1591                 $res = $dbw->select( 'revision',
1592                         'rev_user',
1593                         array(
1594                                 'rev_page' => $this->mTitle->getArticleID(),
1595                                 'rev_timestamp > ' . $dbw->addQuotes( $dbw->timestamp( $edittime ) )
1596                         ),
1597                         __METHOD__,
1598                         array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
1599                 foreach ( $res as $row ) {
1600                         if ( $row->rev_user != $id ) {
1601                                 return false;
1602                         }
1603                 }
1604                 return true;
1605         }
1606
1607         /**
1608          * @private
1609          * @todo document
1610          *
1611          * @parma $editText string
1612          *
1613          * @return bool
1614          * @deprecated since 1.WD, use mergeChangesIntoContent() instead
1615          */
1616         function mergeChangesInto( &$editText ){
1617                 wfDebug( __METHOD__, "1.WD" );
1618
1619                 $editContent = ContentHandler::makeContent( $editText, $this->getTitle(), $this->content_model, $this->content_format );
1620
1621                 $ok = $this->mergeChangesIntoContent( $editContent );
1622
1623                 if ( $ok ) {
1624                         $editText = $editContent->serialize( $this->content_format ); #XXX: really serialize?!
1625                         return true;
1626                 } else {
1627                         return false;
1628                 }
1629         }
1630
1631         /**
1632          * @private
1633          * @todo document
1634          *
1635          * @parma $editText string
1636          *
1637          * @return bool
1638          * @since since 1.WD
1639          */
1640         private function mergeChangesIntoContent( &$editContent ){
1641                 wfProfileIn( __METHOD__ );
1642
1643                 $db = wfGetDB( DB_MASTER );
1644
1645                 // This is the revision the editor started from
1646                 $baseRevision = $this->getBaseRevision();
1647                 if ( is_null( $baseRevision ) ) {
1648                         wfProfileOut( __METHOD__ );
1649                         return false;
1650                 }
1651                 $baseContent = $baseRevision->getContent();
1652
1653                 // The current state, we want to merge updates into it
1654                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1655                 if ( is_null( $currentRevision ) ) {
1656                         wfProfileOut( __METHOD__ );
1657                         return false;
1658                 }
1659                 $currentContent = $currentRevision->getContent();
1660
1661                 $handler = ContentHandler::getForModelID( $baseContent->getModel() );
1662
1663                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
1664
1665                 if ( $result ) {
1666                         $editContent = $result;
1667                         wfProfileOut( __METHOD__ );
1668                         return true;
1669                 } else {
1670                         wfProfileOut( __METHOD__ );
1671                         return false;
1672                 }
1673         }
1674
1675         /**
1676          * @return Revision
1677          */
1678         function getBaseRevision() {
1679                 if ( !$this->mBaseRevision ) {
1680                         $db = wfGetDB( DB_MASTER );
1681                         $baseRevision = Revision::loadFromTimestamp(
1682                                 $db, $this->mTitle, $this->edittime );
1683                         return $this->mBaseRevision = $baseRevision;
1684                 } else {
1685                         return $this->mBaseRevision;
1686                 }
1687         }
1688
1689         /**
1690          * Check given input text against $wgSpamRegex, and return the text of the first match.
1691          *
1692          * @param $text string
1693          *
1694          * @return string|bool matching string or false
1695          */
1696         public static function matchSpamRegex( $text ) {
1697                 global $wgSpamRegex;
1698                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1699                 $regexes = (array)$wgSpamRegex;
1700                 return self::matchSpamRegexInternal( $text, $regexes );
1701         }
1702
1703         /**
1704          * Check given input text against $wgSpamRegex, and return the text of the first match.
1705          *
1706          * @parma $text string
1707          *
1708          * @return string|bool  matching string or false
1709          */
1710         public static function matchSummarySpamRegex( $text ) {
1711                 global $wgSummarySpamRegex;
1712                 $regexes = (array)$wgSummarySpamRegex;
1713                 return self::matchSpamRegexInternal( $text, $regexes );
1714         }
1715
1716         /**
1717          * @param $text string
1718          * @param $regexes array
1719          * @return bool|string
1720          */
1721         protected static function matchSpamRegexInternal( $text, $regexes ) {
1722                 foreach ( $regexes as $regex ) {
1723                         $matches = array();
1724                         if ( preg_match( $regex, $text, $matches ) ) {
1725                                 return $matches[0];
1726                         }
1727                 }
1728                 return false;
1729         }
1730
1731         function setHeaders() {
1732                 global $wgOut, $wgUser;
1733
1734                 $wgOut->addModules( 'mediawiki.action.edit' );
1735
1736                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
1737                         $wgOut->addModules( 'mediawiki.legacy.preview' );
1738                 }
1739                 // Bug #19334: textarea jumps when editing articles in IE8
1740                 $wgOut->addStyle( 'common/IE80Fixes.css', 'screen', 'IE 8' );
1741
1742                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1743
1744                 # Enabled article-related sidebar, toplinks, etc.
1745                 $wgOut->setArticleRelated( true );
1746
1747                 $contextTitle = $this->getContextTitle();
1748                 if ( $this->isConflict ) {
1749                         $msg = 'editconflict';
1750                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
1751                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1752                 } else {
1753                         $msg = $contextTitle->exists() || ( $contextTitle->getNamespace() == NS_MEDIAWIKI && $contextTitle->getDefaultMessageText() !== false ) ?
1754                                 'editing' : 'creating';
1755                 }
1756                 # Use the title defined by DISPLAYTITLE magic word when present
1757                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
1758                 if ( $displayTitle === false ) {
1759                         $displayTitle = $contextTitle->getPrefixedText();
1760                 }
1761                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
1762         }
1763
1764         /**
1765          * Show all applicable editing introductions
1766          */
1767         protected function showIntro() {
1768                 global $wgOut, $wgUser;
1769                 if ( $this->suppressIntro ) {
1770                         return;
1771                 }
1772
1773                 $namespace = $this->mTitle->getNamespace();
1774
1775                 if ( $namespace == NS_MEDIAWIKI ) {
1776                         # Show a warning if editing an interface message
1777                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
1778                 } else if( $namespace == NS_FILE ) {
1779                         # Show a hint to shared repo
1780                         $file = wfFindFile( $this->mTitle );
1781                         if( $file && !$file->isLocal() ) {
1782                                 $descUrl = $file->getDescriptionUrl();
1783                                 # there must be a description url to show a hint to shared repo
1784                                 if( $descUrl ) {
1785                                         if( !$this->mTitle->exists() ) {
1786                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array (
1787                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
1788                                                 ) );
1789                                         } else {
1790                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
1791                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
1792                                                 ) );
1793                                         }
1794                                 }
1795                         }
1796                 }
1797
1798                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
1799                 # Show log extract when the user is currently blocked
1800                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
1801                         $parts = explode( '/', $this->mTitle->getText(), 2 );
1802                         $username = $parts[0];
1803                         $user = User::newFromName( $username, false /* allow IP users*/ );
1804                         $ip = User::isIP( $username );
1805                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
1806                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
1807                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
1808                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
1809                                 LogEventsList::showLogExtract(
1810                                         $wgOut,
1811                                         'block',
1812                                         $user->getUserPage(),
1813                                         '',
1814                                         array(
1815                                                 'lim' => 1,
1816                                                 'showIfEmpty' => false,
1817                                                 'msgKey' => array(
1818                                                         'blocked-notice-logextract',
1819                                                         $user->getName() # Support GENDER in notice
1820                                                 )
1821                                         )
1822                                 );
1823                         }
1824                 }
1825                 # Try to add a custom edit intro, or use the standard one if this is not possible.
1826                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
1827                         if ( $wgUser->isLoggedIn() ) {
1828                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1\n</div>", 'newarticletext' );
1829                         } else {
1830                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1\n</div>", 'newarticletextanon' );
1831                         }
1832                 }
1833                 # Give a notice if the user is editing a deleted/moved page...
1834                 if ( !$this->mTitle->exists() ) {
1835                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
1836                                 '', array( 'lim' => 10,
1837                                            'conds' => array( "log_action != 'revision'" ),
1838                                            'showIfEmpty' => false,
1839                                            'msgKey' => array( 'recreate-moveddeleted-warn' ) )
1840                         );
1841                 }
1842         }
1843
1844         /**
1845          * Attempt to show a custom editing introduction, if supplied
1846          *
1847          * @return bool
1848          */
1849         protected function showCustomIntro() {
1850                 if ( $this->editintro ) {
1851                         $title = Title::newFromText( $this->editintro );
1852                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
1853                                 global $wgOut;
1854                                 // Added using template syntax, to take <noinclude>'s into account.
1855                                 $wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
1856                                 return true;
1857                         } else {
1858                                 return false;
1859                         }
1860                 } else {
1861                         return false;
1862                 }
1863         }
1864
1865         /**
1866          * Send the edit form and related headers to $wgOut
1867          * @param $formCallback Callback that takes an OutputPage parameter; will be called
1868          *     during form output near the top, for captchas and the like.
1869          */
1870         function showEditForm( $formCallback = null ) {
1871                 global $wgOut, $wgUser;
1872
1873                 wfProfileIn( __METHOD__ );
1874
1875                 # need to parse the preview early so that we know which templates are used,
1876                 # otherwise users with "show preview after edit box" will get a blank list
1877                 # we parse this near the beginning so that setHeaders can do the title
1878                 # setting work instead of leaving it in getPreviewText
1879                 $previewOutput = '';
1880                 if ( $this->formtype == 'preview' ) {
1881                         $previewOutput = $this->getPreviewText();
1882                 }
1883
1884                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
1885
1886                 $this->setHeaders();
1887
1888                 if ( $this->showHeader() === false ) {
1889                         wfProfileOut( __METHOD__ );
1890                         return;
1891                 }
1892
1893                 $wgOut->addHTML( $this->editFormPageTop );
1894
1895                 if ( $wgUser->getOption( 'previewontop' ) ) {
1896                         $this->displayPreviewArea( $previewOutput, true );
1897                 }
1898
1899                 $wgOut->addHTML( $this->editFormTextTop );
1900
1901                 $showToolbar = true;
1902                 if ( $this->wasDeletedSinceLastEdit() ) {
1903                         if ( $this->formtype == 'save' ) {
1904                                 // Hide the toolbar and edit area, user can click preview to get it back
1905                                 // Add an confirmation checkbox and explanation.
1906                                 $showToolbar = false;
1907                         } else {
1908                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
1909                                         'deletedwhileediting' );
1910                         }
1911                 }
1912
1913                 #FIXME: add EditForm plugin interface and use it here! #FIXME: search for textarea1 and textares2, and allow EditForm to override all uses.
1914                 $wgOut->addHTML( Html::openElement( 'form', array( 'id' => self::EDITFORM_ID, 'name' => self::EDITFORM_ID,
1915                         'method' => 'post', 'action' => $this->getActionURL( $this->getContextTitle() ),
1916                         'enctype' => 'multipart/form-data' ) ) );
1917
1918                 if ( is_callable( $formCallback ) ) {
1919                         call_user_func_array( $formCallback, array( &$wgOut ) );
1920                 }
1921
1922                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1923
1924                 // Put these up at the top to ensure they aren't lost on early form submission
1925                 $this->showFormBeforeText();
1926
1927                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
1928                         $username = $this->lastDelete->user_name;
1929                         $comment = $this->lastDelete->log_comment;
1930
1931                         // It is better to not parse the comment at all than to have templates expanded in the middle
1932                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
1933                         $key = $comment === ''
1934                                 ? 'confirmrecreate-noreason'
1935                                 : 'confirmrecreate';
1936                         $wgOut->addHTML(
1937                                 '<div class="mw-confirm-recreate">' .
1938                                 wfMsgExt( $key, 'parseinline', $username, "<nowiki>$comment</nowiki>" ) .
1939                                 Xml::checkLabel( wfMsg( 'recreate' ), 'wpRecreate', 'wpRecreate', false,
1940                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
1941                                 ) .
1942                                 '</div>'
1943                         );
1944                 }
1945
1946                 # When the summary is hidden, also hide them on preview/show changes
1947                 if( $this->nosummary ) {
1948                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
1949                 }
1950
1951                 # If a blank edit summary was previously provided, and the appropriate
1952                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1953                 # user being bounced back more than once in the event that a summary
1954                 # is not required.
1955                 #####
1956                 # For a bit more sophisticated detection of blank summaries, hash the
1957                 # automatic one and pass that in the hidden field wpAutoSummary.
1958                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
1959                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
1960                 }
1961
1962                 if ( $this->hasPresetSummary ) {
1963                         // If a summary has been preset using &summary= we dont want to prompt for
1964                         // a different summary. Only prompt for a summary if the summary is blanked.
1965                         // (Bug 17416)
1966                         $this->autoSumm = md5( '' );
1967                 }
1968
1969                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1970                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
1971
1972                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
1973
1974                 $wgOut->addHTML( Html::hidden( 'format', $this->content_format ) );
1975                 $wgOut->addHTML( Html::hidden( 'model', $this->content_model ) );
1976
1977                 if ( $this->section == 'new' ) {
1978                         $this->showSummaryInput( true, $this->summary );
1979                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
1980                 }
1981
1982                 $wgOut->addHTML( $this->editFormTextBeforeContent );
1983
1984                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
1985                         $wgOut->addHTML( EditPage::getEditToolbar() );
1986                 }
1987
1988                 if ( $this->isConflict ) {
1989                         // In an edit conflict bypass the overrideable content form method
1990                         // and fallback to the raw wpTextbox1 since editconflicts can't be
1991                         // resolved between page source edits and custom ui edits using the
1992                         // custom edit ui.
1993                         $this->textbox2 = $this->textbox1;
1994
1995                         $content = $this->getCurrentContent();
1996                         $this->textbox1 = $content->serialize( $this->content_format );
1997
1998                         $this->showTextbox1();
1999                 } else {
2000                         $this->showContentForm();
2001                 }
2002
2003                 $wgOut->addHTML( $this->editFormTextAfterContent );
2004
2005                 $wgOut->addWikiText( $this->getCopywarn() );
2006
2007                 $wgOut->addHTML( $this->editFormTextAfterWarn );
2008
2009                 $this->showStandardInputs();
2010
2011                 $this->showFormAfterText();
2012
2013                 $this->showTosSummary();
2014
2015                 $this->showEditTools();
2016
2017                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2018
2019                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2020                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2021
2022                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2023                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2024
2025                 if ( $this->isConflict ) {
2026                         $this->showConflict();
2027                 }
2028
2029                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2030
2031                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2032                         $this->displayPreviewArea( $previewOutput, false );
2033                 }
2034
2035                 wfProfileOut( __METHOD__ );
2036         }
2037
2038         /**
2039          * Extract the section title from current section text, if any.
2040          *
2041          * @param string $text
2042          * @return Mixed|string or false
2043          */
2044         public static function extractSectionTitle( $text ) {
2045                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2046                 if ( !empty( $matches[2] ) ) {
2047                         global $wgParser;
2048                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2049                 } else {
2050                         return false;
2051                 }
2052         }
2053
2054         protected function showHeader() {
2055                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2056
2057                 if ( $this->mTitle->isTalkPage() ) {
2058                         $wgOut->addWikiMsg( 'talkpagetext' );
2059                 }
2060
2061                 # Optional notices on a per-namespace and per-page basis
2062                 $editnotice_ns = 'editnotice-' . $this->mTitle->getNamespace();
2063                 $editnotice_ns_message = wfMessage( $editnotice_ns );
2064                 if ( $editnotice_ns_message->exists() ) {
2065                         $wgOut->addWikiText( $editnotice_ns_message->plain() );
2066                 }
2067                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
2068                         $parts = explode( '/', $this->mTitle->getDBkey() );
2069                         $editnotice_base = $editnotice_ns;
2070                         while ( count( $parts ) > 0 ) {
2071                                 $editnotice_base .= '-' . array_shift( $parts );
2072                                 $editnotice_base_msg = wfMessage( $editnotice_base );
2073                                 if ( $editnotice_base_msg->exists() ) {
2074                                         $wgOut->addWikiText( $editnotice_base_msg->plain() );
2075                                 }
2076                         }
2077                 } else {
2078                         # Even if there are no subpages in namespace, we still don't want / in MW ns.
2079                         $editnoticeText = $editnotice_ns . '-' . str_replace( '/', '-', $this->mTitle->getDBkey() );
2080                         $editnoticeMsg = wfMessage( $editnoticeText );
2081                         if ( $editnoticeMsg->exists() ) {
2082                                 $wgOut->addWikiText( $editnoticeMsg->plain() );
2083                         }
2084                 }
2085
2086                 if ( $this->isConflict ) {
2087                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2088                         $this->edittime = $this->mArticle->getTimestamp();
2089                 } else {
2090                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2091                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2092                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2093                                 // Someone is welcome to try refactoring though
2094                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2095                                 return false;
2096                         }
2097
2098                         if ( $this->section != '' && $this->section != 'new' ) {
2099                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2100                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 );
2101                                         if ( $sectionTitle !== false ) {
2102                                                 $this->summary = "/* $sectionTitle */ ";
2103                                         }
2104                                 }
2105                         }
2106
2107                         if ( $this->missingComment ) {
2108                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2109                         }
2110
2111                         if ( $this->missingSummary && $this->section != 'new' ) {
2112                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2113                         }
2114
2115                         if ( $this->missingSummary && $this->section == 'new' ) {
2116                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2117                         }
2118
2119                         if ( $this->hookError !== '' ) {
2120                                 $wgOut->addWikiText( $this->hookError );
2121                         }
2122
2123                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2124                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2125                         }
2126
2127                         if ( $this->section != 'new' ) {
2128                                 $revision = $this->mArticle->getRevisionFetched();
2129                                 if ( $revision ) {
2130                                         // Let sysop know that this will make private content public if saved
2131
2132                                         if ( !$revision->userCan( Revision::DELETED_TEXT ) ) {
2133                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
2134                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2135                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
2136                                         }
2137
2138                                         if ( !$revision->isCurrent() ) {
2139                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2140                                                 $wgOut->addWikiMsg( 'editingold' );
2141                                         }
2142                                 } elseif ( $this->mTitle->exists() ) {
2143                                         // Something went wrong
2144
2145                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2146                                                 array( 'missing-article', $this->mTitle->getPrefixedText(),
2147                                                 wfMsgNoTrans( 'missingarticle-rev', $this->oldid ) ) );
2148                                 }
2149                         }
2150                 }
2151
2152                 if ( wfReadOnly() ) {
2153                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
2154                 } elseif ( $wgUser->isAnon() ) {
2155                         if ( $this->formtype != 'preview' ) {
2156                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
2157                         } else {
2158                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
2159                         }
2160                 } else {
2161                         if ( $this->isCssJsSubpage ) {
2162                                 # Check the skin exists
2163                                 if ( $this->isWrongCaseCssJsPage ) {
2164                                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
2165                                 }
2166                                 if ( $this->formtype !== 'preview' ) {
2167                                         if ( $this->isCssSubpage )
2168                                                 $wgOut->wrapWikiMsg( "<div id='mw-usercssyoucanpreview'>\n$1\n</div>", array( 'usercssyoucanpreview' ) );
2169                                         if ( $this->isJsSubpage )
2170                                                 $wgOut->wrapWikiMsg( "<div id='mw-userjsyoucanpreview'>\n$1\n</div>", array( 'userjsyoucanpreview' ) );
2171                                 }
2172                         }
2173                 }
2174
2175                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2176                         # Is the title semi-protected?
2177                         if ( $this->mTitle->isSemiProtected() ) {
2178                                 $noticeMsg = 'semiprotectedpagewarning';
2179                         } else {
2180                                 # Then it must be protected based on static groups (regular)
2181                                 $noticeMsg = 'protectedpagewarning';
2182                         }
2183                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2184                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2185                 }
2186                 if ( $this->mTitle->isCascadeProtected() ) {
2187                         # Is this page under cascading protection from some source pages?
2188                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2189                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2190                         $cascadeSourcesCount = count( $cascadeSources );
2191                         if ( $cascadeSourcesCount > 0 ) {
2192                                 # Explain, and list the titles responsible
2193                                 foreach ( $cascadeSources as $page ) {
2194                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2195                                 }
2196                         }
2197                         $notice .= '</div>';
2198                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2199                 }
2200                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2201                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2202                                 array( 'lim' => 1,
2203                                         'showIfEmpty' => false,
2204                                         'msgKey' => array( 'titleprotectedwarning' ),
2205                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2206                 }
2207
2208                 if ( $this->kblength === false ) {
2209                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2210                 }
2211
2212                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2213                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2214                                 array( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) ) );
2215                 } else {
2216                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2217                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2218                                         array( 'longpage-hint', $wgLang->formatSize( strlen( $this->textbox1 ) ), strlen( $this->textbox1 ) )
2219                                 );
2220                         }
2221                 }
2222         }
2223
2224         /**
2225          * Standard summary input and label (wgSummary), abstracted so EditPage
2226          * subclasses may reorganize the form.
2227          * Note that you do not need to worry about the label's for=, it will be
2228          * inferred by the id given to the input. You can remove them both by
2229          * passing array( 'id' => false ) to $userInputAttrs.
2230          *
2231          * @param $summary string The value of the summary input
2232          * @param $labelText string The html to place inside the label
2233          * @param $inputAttrs array of attrs to use on the input
2234          * @param $spanLabelAttrs array of attrs to use on the span inside the label
2235          *
2236          * @return array An array in the format array( $label, $input )
2237          */
2238         function getSummaryInput( $summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null ) {
2239                 // Note: the maxlength is overriden in JS to 250 and to make it use UTF-8 bytes, not characters.
2240                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2241                         'id' => 'wpSummary',
2242                         'maxlength' => '200',
2243                         'tabindex' => '1',
2244                         'size' => 60,
2245                         'spellcheck' => 'true',
2246                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2247
2248                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2249                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2250                         'id' => "wpSummaryLabel"
2251                 );
2252
2253                 $label = null;
2254                 if ( $labelText ) {
2255                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
2256                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2257                 }
2258
2259                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2260
2261                 return array( $label, $input );
2262         }
2263
2264         /**
2265          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2266          *                          up top, or false if this is the comment summary
2267          *                          down below the textarea
2268          * @param $summary String: The text of the summary to display
2269          * @return String
2270          */
2271         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2272                 global $wgOut, $wgContLang;
2273                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2274                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2275                 if ( $isSubjectPreview ) {
2276                         if ( $this->nosummary ) {
2277                                 return;
2278                         }
2279                 } else {
2280                         if ( !$this->mShowSummaryField ) {
2281                                 return;
2282                         }
2283                 }
2284                 $summary = $wgContLang->recodeForEdit( $summary );
2285                 $labelText = wfMsgExt( $isSubjectPreview ? 'subject' : 'summary', 'parseinline' );
2286                 list( $label, $input ) = $this->getSummaryInput( $summary, $labelText, array( 'class' => $summaryClass ), array() );
2287                 $wgOut->addHTML( "{$label} {$input}" );
2288         }
2289
2290         /**
2291          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2292          *                          up top, or false if this is the comment summary
2293          *                          down below the textarea
2294          * @param $summary String: the text of the summary to display
2295          * @return String
2296          */
2297         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2298                 if ( !$summary || ( !$this->preview && !$this->diff ) )
2299                         return "";
2300
2301                 global $wgParser;
2302
2303                 if ( $isSubjectPreview )
2304                         $summary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $summary ) );
2305
2306                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2307
2308                 $summary = wfMsgExt( $message, 'parseinline' ) . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2309                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2310         }
2311
2312         protected function showFormBeforeText() {
2313                 global $wgOut;
2314                 $section = htmlspecialchars( $this->section );
2315                 $wgOut->addHTML( <<<HTML
2316 <input type='hidden' value="{$section}" name="wpSection" />
2317 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2318 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2319 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2320
2321 HTML
2322                 );
2323                 if ( !$this->checkUnicodeCompliantBrowser() )
2324                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2325         }
2326
2327         protected function showFormAfterText() {
2328                 global $wgOut, $wgUser;
2329                 /**
2330                  * To make it harder for someone to slip a user a page
2331                  * which submits an edit form to the wiki without their
2332                  * knowledge, a random token is associated with the login
2333                  * session. If it's not passed back with the submission,
2334                  * we won't save the page, or render user JavaScript and
2335                  * CSS previews.
2336                  *
2337                  * For anon editors, who may not have a session, we just
2338                  * include the constant suffix to prevent editing from
2339                  * broken text-mangling proxies.
2340                  */
2341                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2342         }
2343
2344         /**
2345          * Subpage overridable method for printing the form for page content editing
2346          * By default this simply outputs wpTextbox1
2347          * Subclasses can override this to provide a custom UI for editing;
2348          * be it a form, or simply wpTextbox1 with a modified content that will be
2349          * reverse modified when extracted from the post data.
2350          * Note that this is basically the inverse for importContentFormData
2351          */
2352         protected function showContentForm() {
2353                 $this->showTextbox1();
2354         }
2355
2356         /**
2357          * Method to output wpTextbox1
2358          * The $textoverride method can be used by subclasses overriding showContentForm
2359          * to pass back to this method.
2360          *
2361          * @param $customAttribs array of html attributes to use in the textarea
2362          * @param $textoverride String: optional text to override $this->textarea1 with
2363          */
2364         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2365                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2366                         $attribs = array( 'style' => 'display:none;' );
2367                 } else {
2368                         $classes = array(); // Textarea CSS
2369                         if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2370                                 # Is the title semi-protected?
2371                                 if ( $this->mTitle->isSemiProtected() ) {
2372                                         $classes[] = 'mw-textarea-sprotected';
2373                                 } else {
2374                                         # Then it must be protected based on static groups (regular)
2375                                         $classes[] = 'mw-textarea-protected';
2376                                 }
2377                                 # Is the title cascade-protected?
2378                                 if ( $this->mTitle->isCascadeProtected() ) {
2379                                         $classes[] = 'mw-textarea-cprotected';
2380                                 }
2381                         }
2382
2383                         $attribs = array( 'tabindex' => 1 );
2384
2385                         if ( is_array( $customAttribs ) ) {
2386                                 $attribs += $customAttribs;
2387                         }
2388
2389                         if ( count( $classes ) ) {
2390                                 if ( isset( $attribs['class'] ) ) {
2391                                         $classes[] = $attribs['class'];
2392                                 }
2393                                 $attribs['class'] = implode( ' ', $classes );
2394                         }
2395                 }
2396
2397                 $this->showTextbox( $textoverride !== null ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
2398         }
2399
2400         protected function showTextbox2() {
2401                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2402         }
2403
2404         protected function showTextbox( $text, $name, $customAttribs = array() ) {
2405                 global $wgOut, $wgUser;
2406
2407                 $wikitext = $this->safeUnicodeOutput( $text );
2408                 if ( strval( $wikitext ) !== '' ) {
2409                         // Ensure there's a newline at the end, otherwise adding lines
2410                         // is awkward.
2411                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2412                         // mode will show an extra newline. A bit annoying.
2413                         $wikitext .= "\n";
2414                 }
2415
2416                 $attribs = $customAttribs + array(
2417                         'accesskey' => ',',
2418                         'id'   => $name,
2419                         'cols' => $wgUser->getIntOption( 'cols' ),
2420                         'rows' => $wgUser->getIntOption( 'rows' ),
2421                         'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
2422                 );
2423
2424                 $pageLang = $this->mTitle->getPageLanguage();
2425                 $attribs['lang'] = $pageLang->getCode();
2426                 $attribs['dir'] = $pageLang->getDir();
2427
2428                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2429         }
2430
2431         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2432                 global $wgOut;
2433                 $classes = array();
2434                 if ( $isOnTop )
2435                         $classes[] = 'ontop';
2436
2437                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2438
2439                 if ( $this->formtype != 'preview' )
2440                         $attribs['style'] = 'display: none;';
2441
2442                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
2443
2444                 if ( $this->formtype == 'preview' ) {
2445                         $this->showPreview( $previewOutput );
2446                 }
2447
2448                 $wgOut->addHTML( '</div>' );
2449
2450                 if ( $this->formtype == 'diff' ) {
2451                         $this->showDiff();
2452                 }
2453         }
2454
2455         /**
2456          * Append preview output to $wgOut.
2457          * Includes category rendering if this is a category page.
2458          *
2459          * @param $text String: the HTML to be output for the preview.
2460          */
2461         protected function showPreview( $text ) {
2462                 global $wgOut;
2463                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2464                         $this->mArticle->openShowCategory();
2465                 }
2466                 # This hook seems slightly odd here, but makes things more
2467                 # consistent for extensions.
2468                 wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
2469                 $wgOut->addHTML( $text );
2470                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2471                         $this->mArticle->closeShowCategory();
2472                 }
2473         }
2474
2475         /**
2476          * Get a diff between the current contents of the edit box and the
2477          * version of the page we're editing from.
2478          *
2479          * If this is a section edit, we'll replace the section as for final
2480          * save and then make a comparison.
2481          */
2482         function showDiff() {
2483                 global $wgUser, $wgContLang, $wgParser, $wgOut;
2484
2485                 $oldtitlemsg = 'currentrev';
2486                 # if message does not exist, show diff against the preloaded default
2487                 if( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
2488                         $oldtext = $this->mTitle->getDefaultMessageText();
2489                         if( $oldtext !== false ) {
2490                                 $oldtitlemsg = 'defaultmessagetext';
2491                                 $oldContent = ContentHandler::makeContent( $oldtext, $this->mTitle );
2492                         } else {
2493                                 $oldContent = null;
2494                         }
2495                 } else {
2496                         $oldContent = $this->getOriginalContent();
2497                 }
2498
2499                 $textboxContent = ContentHandler::makeContent( $this->textbox1, $this->getTitle(),
2500                                                                                                                 $this->content_model, $this->content_format ); #XXX: handle parse errors ?
2501
2502                 $newContent = $this->mArticle->replaceSectionContent(
2503                                                                                                         $this->section, $textboxContent,
2504                                                                                                         $this->summary, $this->edittime );
2505
2506                 # hanlde legacy text-based hook
2507                 $newtext_orig = $newContent->serialize( $this->content_format );
2508                 $newtext = $newtext_orig; #clone
2509                 wfRunHooks( 'EditPageGetDiffText', array( $this, &$newtext ) );
2510
2511                 if ( $newtext != $newtext_orig ) {
2512                                                 #if the hook changed the text, create a new Content object accordingly.
2513                                                 $newContent = ContentHandler::makeContent( $newtext, $this->getTitle(), $newContent->getModel() ); #XXX: handle parse errors ?
2514                 }
2515
2516                 wfRunHooks( 'EditPageGetDiffContent', array( $this, &$newContent ) );
2517
2518                 $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
2519                 $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
2520
2521                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
2522                         $oldtitle = wfMsgExt( $oldtitlemsg, array( 'parseinline' ) );
2523                         $newtitle = wfMsgExt( 'yourtext', array( 'parseinline' ) );
2524
2525                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
2526                         $de->setContent( $oldContent, $newContent );
2527
2528                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2529                         $de->showDiffStyle();
2530                 } else {
2531                         $difftext = '';
2532                 }
2533
2534                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2535         }
2536
2537         /**
2538          * Give a chance for site and per-namespace customizations of
2539          * terms of service summary link that might exist separately
2540          * from the copyright notice.
2541          *
2542          * This will display between the save button and the edit tools,
2543          * so should remain short!
2544          */
2545         protected function showTosSummary() {
2546                 $msg = 'editpage-tos-summary';
2547                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
2548                 if ( !wfMessage( $msg )->isDisabled() ) {
2549                         global $wgOut;
2550                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
2551                         $wgOut->addWikiMsg( $msg );
2552                         $wgOut->addHTML( '</div>' );
2553                 }
2554         }
2555
2556         protected function showEditTools() {
2557                 global $wgOut;
2558                 $wgOut->addHTML( '<div class="mw-editTools">' .
2559                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
2560                         '</div>' );
2561         }
2562
2563         protected function getCopywarn() {
2564                 global $wgRightsText;
2565                 if ( $wgRightsText ) {
2566                         $copywarnMsg = array( 'copyrightwarning',
2567                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
2568                                 $wgRightsText );
2569                 } else {
2570                         $copywarnMsg = array( 'copyrightwarning2',
2571                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
2572                 }
2573                 // Allow for site and per-namespace customization of contribution/copyright notice.
2574                 wfRunHooks( 'EditPageCopyrightWarning', array( $this->mTitle, &$copywarnMsg ) );
2575
2576                 return "<div id=\"editpage-copywarn\">\n" .
2577                         call_user_func_array( "wfMsgNoTrans", $copywarnMsg ) . "\n</div>";
2578         }
2579
2580         protected function showStandardInputs( &$tabindex = 2 ) {
2581                 global $wgOut;
2582                 $wgOut->addHTML( "<div class='editOptions'>\n" );
2583
2584                 if ( $this->section != 'new' ) {
2585                         $this->showSummaryInput( false, $this->summary );
2586                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
2587                 }
2588
2589                 $checkboxes = $this->getCheckboxes( $tabindex,
2590                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
2591                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
2592                 $wgOut->addHTML( "<div class='editButtons'>\n" );
2593                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
2594
2595                 $cancel = $this->getCancelLink();
2596                 if ( $cancel !== '' ) {
2597                         $cancel .= wfMsgExt( 'pipe-separator' , 'escapenoentities' );
2598                 }
2599                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ) );
2600                 $edithelp = '<a target="helpwindow" href="' . $edithelpurl . '">' .
2601                         htmlspecialchars( wfMsg( 'edithelp' ) ) . '</a> ' .
2602                         htmlspecialchars( wfMsg( 'newwindow' ) );
2603                 $wgOut->addHTML( "      <span class='editHelp'>{$cancel}{$edithelp}</span>\n" );
2604                 $wgOut->addHTML( "</div><!-- editButtons -->\n</div><!-- editOptions -->\n" );
2605         }
2606
2607         /**
2608          * Show an edit conflict. textbox1 is already shown in showEditForm().
2609          * If you want to use another entry point to this function, be careful.
2610          */
2611         protected function showConflict() {
2612                 global $wgOut;
2613
2614                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
2615                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2616
2617                         $content1 = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format ); #XXX: handle parse errors?
2618                         $content2 = ContentHandler::makeContent( $this->textbox2, $this->getTitle(), $this->content_model, $this->content_format ); #XXX: handle parse errors?
2619
2620                         $handler = ContentHandler::getForModelID( $this->content_model );
2621                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
2622                         $de->setContent( $content2, $content1 );
2623                         $de->showDiff( wfMsgExt( 'yourtext', 'parseinline' ), wfMsg( 'storedversion' ) );
2624
2625                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2626                         $this->showTextbox2();
2627                 }
2628         }
2629
2630         /**
2631          * @return string
2632          */
2633         public function getCancelLink() {
2634                 $cancelParams = array();
2635                 if ( !$this->isConflict && $this->oldid > 0 ) {
2636                         $cancelParams['oldid'] = $this->oldid;
2637                 }
2638
2639                 return Linker::linkKnown(
2640                         $this->getContextTitle(),
2641                         wfMsgExt( 'cancel', array( 'parseinline' ) ),
2642                         array( 'id' => 'mw-editform-cancel' ),
2643                         $cancelParams
2644                 );
2645         }
2646
2647         /**
2648          * Returns the URL to use in the form's action attribute.
2649          * This is used by EditPage subclasses when simply customizing the action
2650          * variable in the constructor is not enough. This can be used when the
2651          * EditPage lives inside of a Special page rather than a custom page action.
2652          *
2653          * @param $title Title object for which is being edited (where we go to for &action= links)
2654          * @return string
2655          */
2656         protected function getActionURL( Title $title ) {
2657                 return $title->getLocalURL( array( 'action' => $this->action ) );
2658         }
2659
2660         /**
2661          * Check if a page was deleted while the user was editing it, before submit.
2662          * Note that we rely on the logging table, which hasn't been always there,
2663          * but that doesn't matter, because this only applies to brand new
2664          * deletes.
2665          */
2666         protected function wasDeletedSinceLastEdit() {
2667                 if ( $this->deletedSinceEdit !== null ) {
2668                         return $this->deletedSinceEdit;
2669                 }
2670
2671                 $this->deletedSinceEdit = false;
2672
2673                 if ( $this->mTitle->isDeletedQuick() ) {
2674                         $this->lastDelete = $this->getLastDelete();
2675                         if ( $this->lastDelete ) {
2676                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
2677                                 if ( $deleteTime > $this->starttime ) {
2678                                         $this->deletedSinceEdit = true;
2679                                 }
2680                         }
2681                 }
2682
2683                 return $this->deletedSinceEdit;
2684         }
2685
2686         protected function getLastDelete() {
2687                 $dbr = wfGetDB( DB_SLAVE );
2688                 $data = $dbr->selectRow(
2689                         array( 'logging', 'user' ),
2690                         array( 'log_type',
2691                                    'log_action',
2692                                    'log_timestamp',
2693                                    'log_user',
2694                                    'log_namespace',
2695                                    'log_title',
2696                                    'log_comment',
2697                                    'log_params',
2698                                    'log_deleted',
2699                                    'user_name' ),
2700                         array( 'log_namespace' => $this->mTitle->getNamespace(),
2701                                    'log_title' => $this->mTitle->getDBkey(),
2702                                    'log_type' => 'delete',
2703                                    'log_action' => 'delete',
2704                                    'user_id=log_user' ),
2705                         __METHOD__,
2706                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
2707                 );
2708                 // Quick paranoid permission checks...
2709                 if ( is_object( $data ) ) {
2710                         if ( $data->log_deleted & LogPage::DELETED_USER )
2711                                 $data->user_name = wfMsgHtml( 'rev-deleted-user' );
2712                         if ( $data->log_deleted & LogPage::DELETED_COMMENT )
2713                                 $data->log_comment = wfMsgHtml( 'rev-deleted-comment' );
2714                 }
2715                 return $data;
2716         }
2717
2718         /**
2719          * Get the rendered text for previewing.
2720          * @return string
2721          */
2722         function getPreviewText() {
2723                 global $wgOut, $wgUser, $wgParser, $wgRawHtml, $wgLang;
2724
2725                 wfProfileIn( __METHOD__ );
2726
2727                 if ( $wgRawHtml && !$this->mTokenOk ) {
2728                         // Could be an offsite preview attempt. This is very unsafe if
2729                         // HTML is enabled, as it could be an attack.
2730                         $parsedNote = '';
2731                         if ( $this->textbox1 !== '' ) {
2732                                 // Do not put big scary notice, if previewing the empty
2733                                 // string, which happens when you initially edit
2734                                 // a category page, due to automatic preview-on-open.
2735                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
2736                                         wfMsg( 'session_fail_preview_html' ) . "</div>", true, /* interface */true );
2737                         }
2738                         wfProfileOut( __METHOD__ );
2739                         return $parsedNote;
2740                 }
2741
2742                 $note = '';
2743
2744                 try {
2745                         $content = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format );
2746
2747                         if ( $this->mTriedSave && !$this->mTokenOk ) {
2748                                 if ( $this->mTokenOkExceptSuffix ) {
2749                                         $note = wfMsg( 'token_suffix_mismatch' );
2750                                 } else {
2751                                         $note = wfMsg( 'session_fail_preview' );
2752                                 }
2753                         } elseif ( $this->incompleteForm ) {
2754                                 $note = wfMsg( 'edit_form_incomplete' );
2755                         } else {
2756                                 $note = wfMsg( 'previewnote' ) .
2757                                         ' [[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' . wfMsg( 'continue-editing' ) . ']]';
2758                         }
2759
2760                         $parserOptions = ParserOptions::newFromUser( $wgUser );
2761                         $parserOptions->setEditSection( false );
2762                         $parserOptions->setTidy( true );
2763                         $parserOptions->setIsPreview( true );
2764                         $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
2765
2766                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
2767                                 # don't parse non-wikitext pages, show message about preview
2768                                 if( $this->mTitle->isCssJsSubpage() ) {
2769                                         $level = 'user';
2770                                 } elseif( $this->mTitle->isCssOrJsPage() ) {
2771                                         $level = 'site';
2772                                 } else {
2773                                         $level = false;
2774                                 }
2775
2776                                 if ( $content->getModel() == CONTENT_MODEL_CSS ) {
2777                                         $format = 'css';
2778                                 } elseif ( $content->getModel() == CONTENT_MODEL_JAVASCRIPT ) {
2779                                         $format = 'js';
2780                                 } else {
2781                                         $format = false;
2782                                 }
2783
2784                                 # Used messages to make sure grep find them:
2785                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
2786                                 if( $level && $format ) {
2787                                         $note = "<div id='mw-{$level}{$format}preview'>" . wfMsg( "{$level}{$format}preview" ) . "</div>";
2788                                 } else {
2789                                         $note = wfMsg( 'previewnote' );
2790                                 }
2791                         } else {
2792                                 $note = wfMsg( 'previewnote' );
2793                         }
2794
2795                         $rt = $content->getRedirectChain();
2796
2797                         if ( $rt ) {
2798                                 $previewHTML = $this->mArticle->viewRedirect( $rt, false );
2799                         } else {
2800
2801                                 # If we're adding a comment, we need to show the
2802                                 # summary as the headline
2803                                 if ( $this->section == "new" && $this->summary != "" ) {
2804                                         $content = $content->addSectionHeader( $this->summary );
2805                                 }
2806
2807                                 $toparse_orig = $content->serialize( $this->content_format );
2808                                 $toparse = $toparse_orig;
2809                                 wfRunHooks( 'EditPageGetPreviewText', array( $this, &$toparse ) );
2810
2811                                 if ( $toparse !== $toparse_orig ) {
2812                                         #hook changed the text, create new Content object
2813                                         $content = ContentHandler::makeContent( $toparse, $this->getTitle(), $this->content_model, $this->content_format );
2814                                 }
2815
2816                                 wfRunHooks( 'EditPageGetPreviewContent', array( $this, &$content ) );
2817
2818                                 $parserOptions->enableLimitReport();
2819
2820                                 #XXX: For CSS/JS pages, we should have called the ShowRawCssJs hook here. But it's now deprecated, so never mind
2821                                 $content = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
2822
2823                                 // TODO: might be a saner way to get a meaningfull context here?
2824                                 $parserOutput = $content->getParserOutput( $this->getArticle()->getContext(), null, $parserOptions );
2825
2826                                 $previewHTML = $parserOutput->getText();
2827                                 $this->mParserOutput = $parserOutput;
2828                                 $wgOut->addParserOutputNoText( $parserOutput );
2829
2830                                 if ( count( $parserOutput->getWarnings() ) ) {
2831                                         $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
2832                                 }
2833                         }
2834                 } catch (MWContentSerializationException $ex) {
2835                         $note .= "\n\n" . wfMsg('content-failed-to-parse', $this->content_model, $this->content_format, $ex->getMessage() );
2836                         $previewHTML = '';
2837                 }
2838
2839                 if ( $this->isConflict ) {
2840                         $conflict = '<h2 id="mw-previewconflict">' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
2841                 } else {
2842                         $conflict = '<hr />';
2843                 }
2844
2845                 $previewhead = "<div class='previewnote'>\n" .
2846                         '<h2 id="mw-previewheader">' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>" .
2847                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
2848
2849                 $pageLang = $this->mTitle->getPageLanguage();
2850                 $attribs = array( 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
2851                         'class' => 'mw-content-' . $pageLang->getDir() );
2852                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
2853
2854                 wfProfileOut( __METHOD__ );
2855                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
2856         }
2857
2858         /**
2859          * @return Array
2860          */
2861         function getTemplates() {
2862                 if ( $this->preview || $this->section != '' ) {
2863                         $templates = array();
2864                         if ( !isset( $this->mParserOutput ) ) {
2865                                 return $templates;
2866                         }
2867                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
2868                                 foreach ( array_keys( $template ) as $dbk ) {
2869                                         $templates[] = Title::makeTitle( $ns, $dbk );
2870                                 }
2871                         }
2872                         return $templates;
2873                 } else {
2874                         return $this->mTitle->getTemplateLinksFrom();
2875                 }
2876         }
2877
2878         /**
2879          * Shows a bulletin board style toolbar for common editing functions.
2880          * It can be disabled in the user preferences.
2881          * The necessary JavaScript code can be found in skins/common/edit.js.
2882          *
2883          * @return string
2884          */
2885         static function getEditToolbar() {
2886                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
2887                 global $wgUseTeX, $wgEnableUploads, $wgForeignFileRepos;
2888
2889                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
2890
2891                 /**
2892                  * $toolarray is an array of arrays each of which includes the
2893                  * filename of the button image (without path), the opening
2894                  * tag, the closing tag, optionally a sample text that is
2895                  * inserted between the two when no selection is highlighted
2896                  * and.  The tip text is shown when the user moves the mouse
2897                  * over the button.
2898                  *
2899                  * Also here: accesskeys (key), which are not used yet until
2900                  * someone can figure out a way to make them work in
2901                  * IE. However, we should make sure these keys are not defined
2902                  * on the edit page.
2903                  */
2904                 $toolarray = array(
2905                         array(
2906                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
2907                                 'id'     => 'mw-editbutton-bold',
2908                                 'open'   => '\'\'\'',
2909                                 'close'  => '\'\'\'',
2910                                 'sample' => wfMsg( 'bold_sample' ),
2911                                 'tip'    => wfMsg( 'bold_tip' ),
2912                                 'key'    => 'B'
2913                         ),
2914                         array(
2915                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
2916                                 'id'     => 'mw-editbutton-italic',
2917                                 'open'   => '\'\'',
2918                                 'close'  => '\'\'',
2919                                 'sample' => wfMsg( 'italic_sample' ),
2920                                 'tip'    => wfMsg( 'italic_tip' ),
2921                                 'key'    => 'I'
2922                         ),
2923                         array(
2924                                 'image'  => $wgLang->getImageFile( 'button-link' ),
2925                                 'id'     => 'mw-editbutton-link',
2926                                 'open'   => '[[',
2927                                 'close'  => ']]',
2928                                 'sample' => wfMsg( 'link_sample' ),
2929                                 'tip'    => wfMsg( 'link_tip' ),
2930                                 'key'    => 'L'
2931                         ),
2932                         array(
2933                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
2934                                 'id'     => 'mw-editbutton-extlink',
2935                                 'open'   => '[',
2936                                 'close'  => ']',
2937                                 'sample' => wfMsg( 'extlink_sample' ),
2938                                 'tip'    => wfMsg( 'extlink_tip' ),
2939                                 'key'    => 'X'
2940                         ),
2941                         array(
2942                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
2943                                 'id'     => 'mw-editbutton-headline',
2944                                 'open'   => "\n== ",
2945                                 'close'  => " ==\n",
2946                                 'sample' => wfMsg( 'headline_sample' ),
2947                                 'tip'    => wfMsg( 'headline_tip' ),
2948                                 'key'    => 'H'
2949                         ),
2950                         $imagesAvailable ? array(
2951                                 'image'  => $wgLang->getImageFile( 'button-image' ),
2952                                 'id'     => 'mw-editbutton-image',
2953                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
2954                                 'close'  => ']]',
2955                                 'sample' => wfMsg( 'image_sample' ),
2956                                 'tip'    => wfMsg( 'image_tip' ),
2957                                 'key'    => 'D',
2958                         ) : false,
2959                         $imagesAvailable ? array(
2960                                 'image'  => $wgLang->getImageFile( 'button-media' ),
2961                                 'id'     => 'mw-editbutton-media',
2962                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
2963                                 'close'  => ']]',
2964                                 'sample' => wfMsg( 'media_sample' ),
2965                                 'tip'    => wfMsg( 'media_tip' ),
2966                                 'key'    => 'M'
2967                         ) : false,
2968                         $wgUseTeX ? array(
2969                                 'image'  => $wgLang->getImageFile( 'button-math' ),
2970                                 'id'     => 'mw-editbutton-math',
2971                                 'open'   => "<math>",
2972                                 'close'  => "</math>",
2973                                 'sample' => wfMsg( 'math_sample' ),
2974                                 'tip'    => wfMsg( 'math_tip' ),
2975                                 'key'    => 'C'
2976                         ) : false,
2977                         array(
2978                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
2979                                 'id'     => 'mw-editbutton-nowiki',
2980                                 'open'   => "<nowiki>",
2981                                 'close'  => "</nowiki>",
2982                                 'sample' => wfMsg( 'nowiki_sample' ),
2983                                 'tip'    => wfMsg( 'nowiki_tip' ),
2984                                 'key'    => 'N'
2985                         ),
2986                         array(
2987                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
2988                                 'id'     => 'mw-editbutton-signature',
2989                                 'open'   => '--~~~~',
2990                                 'close'  => '',
2991                                 'sample' => '',
2992                                 'tip'    => wfMsg( 'sig_tip' ),
2993                                 'key'    => 'Y'
2994                         ),
2995                         array(
2996                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
2997                                 'id'     => 'mw-editbutton-hr',
2998                                 'open'   => "\n----\n",
2999                                 'close'  => '',
3000                                 'sample' => '',
3001                                 'tip'    => wfMsg( 'hr_tip' ),
3002                                 'key'    => 'R'
3003                         )
3004                 );
3005
3006                 $script = 'mw.loader.using("mediawiki.action.edit", function() {';
3007                 foreach ( $toolarray as $tool ) {
3008                         if ( !$tool ) {
3009                                 continue;
3010                         }
3011
3012                         $params = array(
3013                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
3014                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3015                                 // Older browsers show a "speedtip" type message only for ALT.
3016                                 // Ideally these should be different, realistically they
3017                                 // probably don't need to be.
3018                                 $tip = $tool['tip'],
3019                                 $open = $tool['open'],
3020                                 $close = $tool['close'],
3021                                 $sample = $tool['sample'],
3022                                 $cssId = $tool['id'],
3023                         );
3024
3025                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
3026                 }
3027
3028                 // This used to be called on DOMReady from mediawiki.action.edit, which
3029                 // ended up causing race conditions with the setup code above.
3030                 $script .= "\n" .
3031                         "// Create button bar\n" .
3032                         "$(function() { mw.toolbar.init(); } );\n";
3033
3034                 $script .= '});';
3035                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3036
3037                 $toolbar = '<div id="toolbar"></div>';
3038
3039                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3040
3041                 return $toolbar;
3042         }
3043
3044         /**
3045          * Returns an array of html code of the following checkboxes:
3046          * minor and watch
3047          *
3048          * @param $tabindex int Current tabindex
3049          * @param $checked Array of checkbox => bool, where bool indicates the checked
3050          *                 status of the checkbox
3051          *
3052          * @return array
3053          */
3054         public function getCheckboxes( &$tabindex, $checked ) {
3055                 global $wgUser;
3056
3057                 $checkboxes = array();
3058
3059                 // don't show the minor edit checkbox if it's a new page or section
3060                 if ( !$this->isNew ) {
3061                         $checkboxes['minor'] = '';
3062                         $minorLabel = wfMsgExt( 'minoredit', array( 'parseinline' ) );
3063                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3064                                 $attribs = array(
3065                                         'tabindex'  => ++$tabindex,
3066                                         'accesskey' => wfMsg( 'accesskey-minoredit' ),
3067                                         'id'        => 'wpMinoredit',
3068                                 );
3069                                 $checkboxes['minor'] =
3070                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3071                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3072                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3073                                         ">{$minorLabel}</label>";
3074                         }
3075                 }
3076
3077                 $watchLabel = wfMsgExt( 'watchthis', array( 'parseinline' ) );
3078                 $checkboxes['watch'] = '';
3079                 if ( $wgUser->isLoggedIn() ) {
3080                         $attribs = array(
3081                                 'tabindex'  => ++$tabindex,
3082                                 'accesskey' => wfMsg( 'accesskey-watch' ),
3083                                 'id'        => 'wpWatchthis',
3084                         );
3085                         $checkboxes['watch'] =
3086                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3087                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3088                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3089                                 ">{$watchLabel}</label>";
3090                 }
3091                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3092                 return $checkboxes;
3093         }
3094
3095         /**
3096          * Returns an array of html code of the following buttons:
3097          * save, diff, preview and live
3098          *
3099          * @param $tabindex int Current tabindex
3100          *
3101          * @return array
3102          */
3103         public function getEditButtons( &$tabindex ) {
3104                 $buttons = array();
3105
3106                 $temp = array(
3107                         'id'        => 'wpSave',
3108                         'name'      => 'wpSave',
3109                         'type'      => 'submit',
3110                         'tabindex'  => ++$tabindex,
3111                         'value'     => wfMsg( 'savearticle' ),
3112                         'accesskey' => wfMsg( 'accesskey-save' ),
3113                         'title'     => wfMsg( 'tooltip-save' ) . ' [' . wfMsg( 'accesskey-save' ) . ']',
3114                 );
3115                 $buttons['save'] = Xml::element( 'input', $temp, '' );
3116
3117                 ++$tabindex; // use the same for preview and live preview
3118                 $temp = array(
3119                         'id'        => 'wpPreview',
3120                         'name'      => 'wpPreview',
3121                         'type'      => 'submit',
3122                         'tabindex'  => $tabindex,
3123                         'value'     => wfMsg( 'showpreview' ),
3124                         'accesskey' => wfMsg( 'accesskey-preview' ),
3125                         'title'     => wfMsg( 'tooltip-preview' ) . ' [' . wfMsg( 'accesskey-preview' ) . ']',
3126                 );
3127                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
3128                 $buttons['live'] = '';
3129
3130                 $temp = array(
3131                         'id'        => 'wpDiff',
3132                         'name'      => 'wpDiff',
3133                         'type'      => 'submit',
3134                         'tabindex'  => ++$tabindex,
3135                         'value'     => wfMsg( 'showdiff' ),
3136                         'accesskey' => wfMsg( 'accesskey-diff' ),
3137                         'title'     => wfMsg( 'tooltip-diff' ) . ' [' . wfMsg( 'accesskey-diff' ) . ']',
3138                 );
3139                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
3140
3141                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3142                 return $buttons;
3143         }
3144
3145         /**
3146          * Output preview text only. This can be sucked into the edit page
3147          * via JavaScript, and saves the server time rendering the skin as
3148          * well as theoretically being more robust on the client (doesn't
3149          * disturb the edit box's undo history, won't eat your text on
3150          * failure, etc).
3151          *
3152          * @todo This doesn't include category or interlanguage links.
3153          *       Would need to enhance it a bit, <s>maybe wrap them in XML
3154          *       or something...</s> that might also require more skin
3155          *       initialization, so check whether that's a problem.
3156          */
3157         function livePreview() {
3158                 global $wgOut;
3159                 $wgOut->disable();
3160                 header( 'Content-type: text/xml; charset=utf-8' );
3161                 header( 'Cache-control: no-cache' );
3162
3163                 $previewText = $this->getPreviewText();
3164                 #$categories = $skin->getCategoryLinks();
3165
3166                 $s =
3167                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3168                 Xml::tags( 'livepreview', null,
3169                         Xml::element( 'preview', null, $previewText )
3170                         #.      Xml::element( 'category', null, $categories )
3171                 );
3172                 echo $s;
3173         }
3174
3175         /**
3176          * Call the stock "user is blocked" page
3177          *
3178          * @deprecated in 1.19; throw an exception directly instead
3179          */
3180         function blockedPage() {
3181                 wfDeprecated( __METHOD__, '1.19' );
3182                 global $wgUser;
3183
3184                 throw new UserBlockedError( $wgUser->getBlock() );
3185         }
3186
3187         /**
3188          * Produce the stock "please login to edit pages" page
3189          *
3190          * @deprecated in 1.19; throw an exception directly instead
3191          */
3192         function userNotLoggedInPage() {
3193                 wfDeprecated( __METHOD__, '1.19' );
3194                 throw new PermissionsError( 'edit' );
3195         }
3196
3197         /**
3198          * Show an error page saying to the user that he has insufficient permissions
3199          * to create a new page
3200          *
3201          * @deprecated in 1.19; throw an exception directly instead
3202          */
3203         function noCreatePermission() {
3204                 wfDeprecated( __METHOD__, '1.19' );
3205                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
3206                 throw new PermissionsError( $permission );
3207         }
3208
3209         /**
3210          * Creates a basic error page which informs the user that
3211          * they have attempted to edit a nonexistent section.
3212          */
3213         function noSuchSectionPage() {
3214                 global $wgOut;
3215
3216                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3217
3218                 $res = wfMsgExt( 'nosuchsectiontext', 'parse', $this->section );
3219                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
3220                 $wgOut->addHTML( $res );
3221
3222                 $wgOut->returnToMain( false, $this->mTitle );
3223         }
3224
3225         /**
3226          * Produce the stock "your edit contains spam" page
3227          *
3228          * @param $match string Text which triggered one or more filters
3229          * @deprecated since 1.17 Use method spamPageWithContent() instead
3230          */
3231         static function spamPage( $match = false ) {
3232                 wfDeprecated( __METHOD__, '1.17' );
3233
3234                 global $wgOut, $wgTitle;
3235
3236                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3237
3238                 $wgOut->addHTML( '<div id="spamprotected">' );
3239                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3240                 if ( $match ) {
3241                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3242                 }
3243                 $wgOut->addHTML( '</div>' );
3244
3245                 $wgOut->returnToMain( false, $wgTitle );
3246         }
3247
3248         /**
3249          * Show "your edit contains spam" page with your diff and text
3250          *
3251          * @param $match string|Array|bool Text (or array of texts) which triggered one or more filters
3252          */
3253         public function spamPageWithContent( $match = false ) {
3254                 global $wgOut, $wgLang;
3255                 $this->textbox2 = $this->textbox1;
3256
3257                 if( is_array( $match ) ){
3258                         $match = $wgLang->listToText( $match );
3259                 }
3260                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3261
3262                 $wgOut->addHTML( '<div id="spamprotected">' );
3263                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3264                 if ( $match ) {
3265                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3266                 }
3267                 $wgOut->addHTML( '</div>' );
3268
3269                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3270                 $this->showDiff();
3271
3272                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3273                 $this->showTextbox2();
3274
3275                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3276         }
3277
3278         /**
3279          * Format an anchor fragment as it would appear for a given section name
3280          * @param $text String
3281          * @return String
3282          * @private
3283          */
3284         function sectionAnchor( $text ) {
3285                 global $wgParser;
3286                 return $wgParser->guessSectionNameFromWikiText( $text );
3287         }
3288
3289         /**
3290          * Check if the browser is on a blacklist of user-agents known to
3291          * mangle UTF-8 data on form submission. Returns true if Unicode
3292          * should make it through, false if it's known to be a problem.
3293          * @return bool
3294          * @private
3295          */
3296         function checkUnicodeCompliantBrowser() {
3297                 global $wgBrowserBlackList;
3298                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
3299                         // No User-Agent header sent? Trust it by default...
3300                         return true;
3301                 }
3302                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
3303                 foreach ( $wgBrowserBlackList as $browser ) {
3304                         if ( preg_match( $browser, $currentbrowser ) ) {
3305                                 return false;
3306                         }
3307                 }
3308                 return true;
3309         }
3310
3311         /**
3312          * Filter an input field through a Unicode de-armoring process if it
3313          * came from an old browser with known broken Unicode editing issues.
3314          *
3315          * @param $request WebRequest
3316          * @param $field String
3317          * @return String
3318          * @private
3319          */
3320         function safeUnicodeInput( $request, $field ) {
3321                 $text = rtrim( $request->getText( $field ) );
3322                 return $request->getBool( 'safemode' )
3323                         ? $this->unmakesafe( $text )
3324                         : $text;
3325         }
3326
3327         /**
3328          * @param $request WebRequest
3329          * @param $text string
3330          * @return string
3331          */
3332         function safeUnicodeText( $request, $text ) {
3333                 $text = rtrim( $text );
3334                 return $request->getBool( 'safemode' )
3335                         ? $this->unmakesafe( $text )
3336                         : $text;
3337         }
3338
3339         /**
3340          * Filter an output field through a Unicode armoring process if it is
3341          * going to an old browser with known broken Unicode editing issues.
3342          *
3343          * @param $text String
3344          * @return String
3345          * @private
3346          */
3347         function safeUnicodeOutput( $text ) {
3348                 global $wgContLang;
3349                 $codedText = $wgContLang->recodeForEdit( $text );
3350                 return $this->checkUnicodeCompliantBrowser()
3351                         ? $codedText
3352                         : $this->makesafe( $codedText );
3353         }
3354
3355         /**
3356          * A number of web browsers are known to corrupt non-ASCII characters
3357          * in a UTF-8 text editing environment. To protect against this,
3358          * detected browsers will be served an armored version of the text,
3359          * with non-ASCII chars converted to numeric HTML character references.
3360          *
3361          * Preexisting such character references will have a 0 added to them
3362          * to ensure that round-trips do not alter the original data.
3363          *
3364          * @param $invalue String
3365          * @return String
3366          * @private
3367          */
3368         function makesafe( $invalue ) {
3369                 // Armor existing references for reversability.
3370                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
3371
3372                 $bytesleft = 0;
3373                 $result = "";
3374                 $working = 0;
3375                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3376                         $bytevalue = ord( $invalue[$i] );
3377                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
3378                                 $result .= chr( $bytevalue );
3379                                 $bytesleft = 0;
3380                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
3381                                 $working = $working << 6;
3382                                 $working += ( $bytevalue & 0x3F );
3383                                 $bytesleft--;
3384                                 if ( $bytesleft <= 0 ) {
3385                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
3386                                 }
3387                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
3388                                 $working = $bytevalue & 0x1F;
3389                                 $bytesleft = 1;
3390                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
3391                                 $working = $bytevalue & 0x0F;
3392                                 $bytesleft = 2;
3393                         } else { // 1111 0xxx
3394                                 $working = $bytevalue & 0x07;
3395                                 $bytesleft = 3;
3396                         }
3397                 }
3398                 return $result;
3399         }
3400
3401         /**
3402          * Reverse the previously applied transliteration of non-ASCII characters
3403          * back to UTF-8. Used to protect data from corruption by broken web browsers
3404          * as listed in $wgBrowserBlackList.
3405          *
3406          * @param $invalue String
3407          * @return String
3408          * @private
3409          */
3410         function unmakesafe( $invalue ) {
3411                 $result = "";
3412                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3413                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
3414                                 $i += 3;
3415                                 $hexstring = "";
3416                                 do {
3417                                         $hexstring .= $invalue[$i];
3418                                         $i++;
3419                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
3420
3421                                 // Do some sanity checks. These aren't needed for reversability,
3422                                 // but should help keep the breakage down if the editor
3423                                 // breaks one of the entities whilst editing.
3424                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) and ( strlen( $hexstring ) <= 6 ) ) {
3425                                         $codepoint = hexdec( $hexstring );
3426                                         $result .= codepointToUtf8( $codepoint );
3427                                 } else {
3428                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
3429                                 }
3430                         } else {
3431                                 $result .= substr( $invalue, $i, 1 );
3432                         }
3433                 }
3434                 // reverse the transform that we made for reversability reasons.
3435                 return strtr( $result, array( "&#x0" => "&#x" ) );
3436         }
3437 }