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: The filter function set in $wgFilterCallback returned true (= block it)
  41          */
  42         const AS_FILTERING                 = 211;
  43
  44         /**
  45          * Status: A hook function returned an error
  46          */
  47         const AS_HOOK_ERROR_EXPECTED       = 212;
  48
  49         /**
  50          * Status: User is blocked from editting this page
  51          */
  52         const AS_BLOCKED_PAGE_FOR_USER     = 215;
  53
  54         /**
  55          * Status: Content too big (> $wgMaxArticleSize)
  56          */
  57         const AS_CONTENT_TOO_BIG           = 216;
  58
  59         /**
  60          * Status: User cannot edit? (not used)
  61          */
  62         const AS_USER_CANNOT_EDIT          = 217;
  63
  64         /**
  65          * Status: this anonymous user is not allowed to edit this page
  66          */
  67         const AS_READ_ONLY_PAGE_ANON       = 218;
  68
  69         /**
  70          * Status: this logged in user is not allowed to edit this page
  71          */
  72         const AS_READ_ONLY_PAGE_LOGGED     = 219;
  73
  74         /**
  75          * Status: wiki is in readonly mode (wfReadOnly() == true)
  76          */
  77         const AS_READ_ONLY_PAGE            = 220;
  78
  79         /**
  80          * Status: rate limiter for action 'edit' was tripped
  81          */
  82         const AS_RATE_LIMITED              = 221;
  83
  84         /**
  85          * Status: article was deleted while editting and param wpRecreate == false or form
  86          * was not posted
  87          */
  88         const AS_ARTICLE_WAS_DELETED       = 222;
  89
  90         /**
  91          * Status: user tried to create this page, but is not allowed to do that
  92          * ( Title->usercan('create') == false )
  93          */
  94         const AS_NO_CREATE_PERMISSION      = 223;
  95
  96         /**
  97          * Status: user tried to create a blank page
  98          */
  99         const AS_BLANK_ARTICLE             = 224;
 100
 101         /**
 102          * Status: (non-resolvable) edit conflict
 103          */
 104         const AS_CONFLICT_DETECTED         = 225;
 105
 106         /**
 107          * Status: no edit summary given and the user has forceeditsummary set and the user is not
 108          * editting in his own userspace or talkspace and wpIgnoreBlankSummary == false
 109          */
 110         const AS_SUMMARY_NEEDED            = 226;
 111
 112         /**
 113          * Status: user tried to create a new section without content
 114          */
 115         const AS_TEXTBOX_EMPTY             = 228;
 116
 117         /**
 118          * Status: article is too big (> $wgMaxArticleSize), after merging in the new section
 119          */
 120         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
 121
 122         /**
 123          * not used
 124          */
 125         const AS_OK                        = 230;
 126
 127         /**
 128          * Status: WikiPage::doEdit() was unsuccessfull
 129          */
 130         const AS_END                       = 231;
 131
 132         /**
 133          * Status: summary contained spam according to one of the regexes in $wgSummarySpamRegex
 134          */
 135         const AS_SPAM_ERROR                = 232;
 136
 137         /**
 138          * Status: anonymous user is not allowed to upload (User::isAllowed('upload') == false)
 139          */
 140         const AS_IMAGE_REDIRECT_ANON       = 233;
 141
 142         /**
 143          * Status: logged in user is not allowed to upload (User::isAllowed('upload') == false)
 144          */
 145         const AS_IMAGE_REDIRECT_LOGGED     = 234;
 146
 147         /**
 148          * Status: can't parse content
 149          */
 150         const AS_PARSE_ERROR                = 240;
 151
 152         /**
 153          * HTML id and name for the beginning of the edit form.
 154          */
 155         const EDITFORM_ID                  = 'editform';
 156
 157         /**
 158          * @var Article
 159          */
 160         var $mArticle;
 161
 162         /**
 163          * @var Title
 164          */
 165         var $mTitle;
 166         private $mContextTitle = null;
 167         var $action = 'submit';
 168         var $isConflict = false;
 169         var $isCssJsSubpage = false;
 170         var $isCssSubpage = false;
 171         var $isJsSubpage = false;
 172         var $isWrongCaseCssJsPage = false;
 173         var $isNew = false; // new page or new section
 174         var $deletedSinceEdit;
 175         var $formtype;
 176         var $firsttime;
 177         var $lastDelete;
 178         var $mTokenOk = false;
 179         var $mTokenOkExceptSuffix = false;
 180         var $mTriedSave = false;
 181         var $incompleteForm = false;
 182         var $tooBig = false;
 183         var $kblength = false;
 184         var $missingComment = false;
 185         var $missingSummary = false;
 186         var $allowBlankSummary = false;
 187         var $autoSumm = '';
 188         var $hookError = '';
 189         #var $mPreviewTemplates;
 190
 191         /**
 192          * @var ParserOutput
 193          */
 194         var $mParserOutput;
 195
 196         /**
 197          * Has a summary been preset using GET parameter &summary= ?
 198          * @var Bool
 199          */
 200         var $hasPresetSummary = false;
 201
 202         var $mBaseRevision = false;
 203         var $mShowSummaryField = true;
 204
 205         # Form values
 206         var $save = false, $preview = false, $diff = false;
 207         var $minoredit = false, $watchthis = false, $recreate = false;
 208         var $textbox1 = '', $textbox2 = '', $summary = '', $nosummary = false;
 209         var $edittime = '', $section = '', $sectiontitle = '', $starttime = '';
 210         var $oldid = 0, $editintro = '', $scrolltop = null, $bot = true;
 211         var $content_model = null, $content_format = null;
 212
 213         # Placeholders for text injection by hooks (must be HTML)
 214         # extensions should take care to _append_ to the present value
 215         public $editFormPageTop = ''; // Before even the preview
 216         public $editFormTextTop = '';
 217         public $editFormTextBeforeContent = '';
 218         public $editFormTextAfterWarn = '';
 219         public $editFormTextAfterTools = '';
 220         public $editFormTextBottom = '';
 221         public $editFormTextAfterContent = '';
 222         public $previewTextAfterContent = '';
 223         public $mPreloadContent = null;
 224
 225         /* $didSave should be set to true whenever an article was succesfully altered. */
 226         public $didSave = false;
 227         public $undidRev = 0;
 228
 229         public $suppressIntro = false;
 230
 231         /**
 232          * @param $article Article
 233          */
 234         public function __construct( Article $article ) {
 235                 $this->mArticle = $article;
 236                 $this->mTitle = $article->getTitle();
 237
 238                 $this->content_model = $this->mTitle->getContentModelName();
 239
 240                 $handler = ContentHandler::getForModelName( $this->content_model );
 241                 $this->content_format = $handler->getDefaultFormat(); #NOTE: should be overridden by format of actual revision
 242         }
 243
 244         /**
 245          * @return Article
 246          */
 247         public function getArticle() {
 248                 return $this->mArticle;
 249         }
 250
 251         /**
 252          * @since 1.19
 253          * @return Title
 254          */
 255         public function getTitle() {
 256                 return $this->mTitle;
 257         }
 258
 259         /**
 260          * Set the context Title object
 261          *
 262          * @param $title Title object or null
 263          */
 264         public function setContextTitle( $title ) {
 265                 $this->mContextTitle = $title;
 266         }
 267
 268         /**
 269          * Get the context title object.
 270          * If not set, $wgTitle will be returned. This behavior might changed in
 271          * the future to return $this->mTitle instead.
 272          *
 273          * @return Title object
 274          */
 275         public function getContextTitle() {
 276                 if ( is_null( $this->mContextTitle ) ) {
 277                         global $wgTitle;
 278                         return $wgTitle;
 279                 } else {
 280                         return $this->mContextTitle;
 281                 }
 282         }
 283
 284         function submit() {
 285                 $this->edit();
 286         }
 287
 288         /**
 289          * This is the function that gets called for "action=edit". It
 290          * sets up various member variables, then passes execution to
 291          * another function, usually showEditForm()
 292          *
 293          * The edit form is self-submitting, so that when things like
 294          * preview and edit conflicts occur, we get the same form back
 295          * with the extra stuff added.  Only when the final submission
 296          * is made and all is well do we actually save and redirect to
 297          * the newly-edited page.
 298          */
 299         function edit() {
 300                 global $wgOut, $wgRequest, $wgUser;
 301                 // Allow extensions to modify/prevent this form or submission
 302                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 303                         return;
 304                 }
 305
 306                 wfProfileIn( __METHOD__ );
 307                 wfDebug( __METHOD__ . ": enter\n" );
 308
 309                 // If they used redlink=1 and the page exists, redirect to the main article
 310                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 311                         $wgOut->redirect( $this->mTitle->getFullURL() );
 312                         wfProfileOut( __METHOD__ );
 313                         return;
 314                 }
 315
 316                 $this->importFormData( $wgRequest );
 317                 $this->firsttime = false;
 318
 319                 if ( $this->live ) {
 320                         $this->livePreview();
 321                         wfProfileOut( __METHOD__ );
 322                         return;
 323                 }
 324
 325                 if ( wfReadOnly() && $this->save ) {
 326                         // Force preview
 327                         $this->save = false;
 328                         $this->preview = true;
 329                 }
 330
 331                 if ( $this->save ) {
 332                         $this->formtype = 'save';
 333                 } elseif ( $this->preview ) {
 334                         $this->formtype = 'preview';
 335                 } elseif ( $this->diff ) {
 336                         $this->formtype = 'diff';
 337                 } else { # First time through
 338                         $this->firsttime = true;
 339                         if ( $this->previewOnOpen() ) {
 340                                 $this->formtype = 'preview';
 341                         } else {
 342                                 $this->formtype = 'initial';
 343                         }
 344                 }
 345
 346                 $permErrors = $this->getEditPermissionErrors();
 347                 if ( $permErrors ) {
 348                         wfDebug( __METHOD__ . ": User can't edit\n" );
 349                         // Auto-block user's IP if the account was "hard" blocked
 350                         $wgUser->spreadAnyEditBlock();
 351
 352                         $this->displayPermissionsError( $permErrors );
 353
 354                         wfProfileOut( __METHOD__ );
 355                         return;
 356                 }
 357
 358                 wfProfileIn( __METHOD__ . "-business-end" );
 359
 360                 $this->isConflict = false;
 361                 // css / js subpages of user pages get a special treatment
 362                 $this->isCssJsSubpage       = $this->mTitle->isCssJsSubpage();
 363                 $this->isCssSubpage         = $this->mTitle->isCssSubpage();
 364                 $this->isJsSubpage          = $this->mTitle->isJsSubpage();
 365                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 366                 $this->isNew                = !$this->mTitle->exists() || $this->section == 'new';
 367
 368                 # Show applicable editing introductions
 369                 if ( $this->formtype == 'initial' || $this->firsttime ) {
 370                         $this->showIntro();
 371                 }
 372
 373                 # Attempt submission here.  This will check for edit conflicts,
 374                 # and redundantly check for locked database, blocked IPs, etc.
 375                 # that edit() already checked just in case someone tries to sneak
 376                 # in the back door with a hand-edited submission URL.
 377
 378                 if ( 'save' == $this->formtype ) {
 379                         if ( !$this->attemptSave() ) {
 380                                 wfProfileOut( __METHOD__ . "-business-end" );
 381                                 wfProfileOut( __METHOD__ );
 382                                 return;
 383                         }
 384                 }
 385
 386                 # First time through: get contents, set time for conflict
 387                 # checking, etc.
 388                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 389                         if ( $this->initialiseForm() === false ) {
 390                                 $this->noSuchSectionPage();
 391                                 wfProfileOut( __METHOD__ . "-business-end" );
 392                                 wfProfileOut( __METHOD__ );
 393                                 return;
 394                         }
 395                         if ( !$this->mTitle->getArticleID() )
 396                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 397                         else
 398                                 wfRunHooks( 'EditFormInitialText', array( $this ) );
 399                 }
 400
 401                 $this->showEditForm();
 402                 wfProfileOut( __METHOD__ . "-business-end" );
 403                 wfProfileOut( __METHOD__ );
 404         }
 405
 406         /**
 407          * @return array
 408          */
 409         protected function getEditPermissionErrors() {
 410                 global $wgUser;
 411                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 412                 # Can this title be created?
 413                 if ( !$this->mTitle->exists() ) {
 414                         $permErrors = array_merge( $permErrors,
 415                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 416                 }
 417                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 418                 $remove = array();
 419                 foreach ( $permErrors as $error ) {
 420                         if ( ( $this->preview || $this->diff ) &&
 421                                 ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' ) )
 422                         {
 423                                 $remove[] = $error;
 424                         }
 425                 }
 426                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 427                 return $permErrors;
 428         }
 429
 430         /**
 431          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 432          * but with the following differences:
 433          * - If redlink=1, the user will be redirected to the page
 434          * - If there is content to display or the error occurs while either saving,
 435          *   previewing or showing the difference, it will be a
 436          *   "View source for ..." page displaying the source code after the error message.
 437          *
 438          * @since 1.19
 439          * @param $permErrors Array of permissions errors, as returned by
 440          *                    Title::getUserPermissionsErrors().
 441          */
 442         protected function displayPermissionsError( array $permErrors ) {
 443                 global $wgRequest, $wgOut;
 444
 445                 if ( $wgRequest->getBool( 'redlink' ) ) {
 446                         // The edit page was reached via a red link.
 447                         // Redirect to the article page and let them click the edit tab if
 448                         // they really want a permission error.
 449                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 450                         return;
 451                 }
 452
 453                 $content = $this->getContentObject();
 454
 455                 # Use the normal message if there's nothing to display
 456                 if ( $this->firsttime && $content->isEmpty() ) {
 457                         $action = $this->mTitle->exists() ? 'edit' :
 458                                 ( $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 459                         throw new PermissionsError( $action, $permErrors );
 460                 }
 461
 462                 $wgOut->setPageTitle( wfMessage( 'viewsource-title', $this->getContextTitle()->getPrefixedText() ) );
 463                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 464                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 465                 $wgOut->addHTML( "<hr />\n" );
 466
 467                 # If the user made changes, preserve them when showing the markup
 468                 # (This happens when a user is blocked during edit, for instance)
 469                 if ( !$this->firsttime ) {
 470                         $text = $this->textbox1;
 471                         $wgOut->addWikiMsg( 'viewyourtext' );
 472                 } else {
 473                         $text = $content->serialize( $this->content_format );
 474                         $wgOut->addWikiMsg( 'viewsourcetext' );
 475                 }
 476
 477                 $this->showTextbox( $text, 'wpTextbox1', array( 'readonly' ) );
 478
 479                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 480                         Linker::formatTemplates( $this->getTemplates() ) ) );
 481
 482                 if ( $this->mTitle->exists() ) {
 483                         $wgOut->returnToMain( null, $this->mTitle );
 484                 }
 485         }
 486
 487         /**
 488          * Show a read-only error
 489          * Parameters are the same as OutputPage:readOnlyPage()
 490          * Redirect to the article page if redlink=1
 491          * @deprecated in 1.19; use displayPermissionsError() instead
 492          */
 493         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 494                 wfDeprecated( __METHOD__, '1.19' );
 495
 496                 global $wgRequest, $wgOut;
 497                 if ( $wgRequest->getBool( 'redlink' ) ) {
 498                         // The edit page was reached via a red link.
 499                         // Redirect to the article page and let them click the edit tab if
 500                         // they really want a permission error.
 501                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 502                 } else {
 503                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 504                 }
 505         }
 506
 507         /**
 508          * Should we show a preview when the edit form is first shown?
 509          *
 510          * @return bool
 511          */
 512         protected function previewOnOpen() {
 513                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 514                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 515                         // Explicit override from request
 516                         return true;
 517                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 518                         // Explicit override from request
 519                         return false;
 520                 } elseif ( $this->section == 'new' ) {
 521                         // Nothing *to* preview for new sections
 522                         return false;
 523                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 524                         // Standard preference behaviour
 525                         return true;
 526                 } elseif ( !$this->mTitle->exists() &&
 527                   isset( $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] ) &&
 528                   $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 529                 {
 530                         // Categories are special
 531                         return true;
 532                 } else {
 533                         return false;
 534                 }
 535         }
 536
 537         /**
 538          * Checks whether the user entered a skin name in uppercase,
 539          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 540          *
 541          * @return bool
 542          */
 543         protected function isWrongCaseCssJsPage() {
 544                 if ( $this->mTitle->isCssJsSubpage() ) {
 545                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 546                         $skins = array_merge(
 547                                 array_keys( Skin::getSkinNames() ),
 548                                 array( 'common' )
 549                         );
 550                         return !in_array( $name, $skins )
 551                                 && in_array( strtolower( $name ), $skins );
 552                 } else {
 553                         return false;
 554                 }
 555         }
 556
 557         /**
 558          * Does this EditPage class support section editing?
 559          * This is used by EditPage subclasses to indicate their ui cannot handle section edits
 560          *
 561          * @return bool
 562          */
 563         protected function isSectionEditSupported() {
 564                 return true;
 565         }
 566
 567         /**
 568          * This function collects the form data and uses it to populate various member variables.
 569          * @param $request WebRequest
 570          */
 571         function importFormData( &$request ) {
 572                 global $wgLang, $wgUser;
 573
 574                 wfProfileIn( __METHOD__ );
 575
 576                 # Section edit can come from either the form or a link
 577                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 578
 579                 if ( $request->wasPosted() ) {
 580                         # These fields need to be checked for encoding.
 581                         # Also remove trailing whitespace, but don't remove _initial_
 582                         # whitespace from the text boxes. This may be significant formatting.
 583                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 584                         if ( !$request->getCheck( 'wpTextbox2' ) ) {
 585                                 // Skip this if wpTextbox2 has input, it indicates that we came
 586                                 // from a conflict page with raw page text, not a custom form
 587                                 // modified by subclasses
 588                                 wfProfileIn( get_class( $this ) . "::importContentFormData" );
 589                                 $textbox1 = $this->importContentFormData( $request );
 590                                 if ( isset( $textbox1 ) )
 591                                         $this->textbox1 = $textbox1;
 592                                 wfProfileOut( get_class( $this ) . "::importContentFormData" );
 593                         }
 594
 595                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 596                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary' ), 250 );
 597
 598                         # If the summary consists of a heading, e.g. '==Foobar==', extract the title from the
 599                         # header syntax, e.g. 'Foobar'. This is mainly an issue when we are using wpSummary for
 600                         # section titles.
 601                         $this->summary = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary );
 602
 603                         # Treat sectiontitle the same way as summary.
 604                         # Note that wpSectionTitle is not yet a part of the actual edit form, as wpSummary is
 605                         # currently doing double duty as both edit summary and section title. Right now this
 606                         # is just to allow API edits to work around this limitation, but this should be
 607                         # incorporated into the actual edit form when EditPage is rewritten (Bugs 18654, 26312).
 608                         $this->sectiontitle = $wgLang->truncate( $request->getText( 'wpSectionTitle' ), 250 );
 609                         $this->sectiontitle = preg_replace( '/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->sectiontitle );
 610
 611                         $this->edittime = $request->getVal( 'wpEdittime' );
 612                         $this->starttime = $request->getVal( 'wpStarttime' );
 613
 614                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 615
 616                         if ( $this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null ) {
 617                                 // wpTextbox1 field is missing, possibly due to being "too big"
 618                                 // according to some filter rules such as Suhosin's setting for
 619                                 // suhosin.request.max_value_length (d'oh)
 620                                 $this->incompleteForm = true;
 621                         } else {
 622                                 // edittime should be one of our last fields; if it's missing,
 623                                 // the submission probably broke somewhere in the middle.
 624                                 $this->incompleteForm = is_null( $this->edittime );
 625                         }
 626                         if ( $this->incompleteForm ) {
 627                                 # If the form is incomplete, force to preview.
 628                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 629                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 630                                 $this->preview = true;
 631                         } else {
 632                                 /* Fallback for live preview */
 633                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 634                                 $this->diff = $request->getCheck( 'wpDiff' );
 635
 636                                 // Remember whether a save was requested, so we can indicate
 637                                 // if we forced preview due to session failure.
 638                                 $this->mTriedSave = !$this->preview;
 639
 640                                 if ( $this->tokenOk( $request ) ) {
 641                                         # Some browsers will not report any submit button
 642                                         # if the user hits enter in the comment box.
 643                                         # The unmarked state will be assumed to be a save,
 644                                         # if the form seems otherwise complete.
 645                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 646                                 } elseif ( $this->diff ) {
 647                                         # Failed token check, but only requested "Show Changes".
 648                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 649                                 } else {
 650                                         # Page might be a hack attempt posted from
 651                                         # an external site. Preview instead of saving.
 652                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 653                                         $this->preview = true;
 654                                 }
 655                         }
 656                         $this->save = !$this->preview && !$this->diff;
 657                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 658                                 $this->edittime = null;
 659                         }
 660
 661                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 662                                 $this->starttime = null;
 663                         }
 664
 665                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 666
 667                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 668                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 669
 670                         # Don't force edit summaries when a user is editing their own user or talk page
 671                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 672                                 $this->mTitle->getText() == $wgUser->getName() )
 673                         {
 674                                 $this->allowBlankSummary = true;
 675                         } else {
 676                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary' );
 677                         }
 678
 679                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 680                 } else {
 681                         # Not a posted form? Start with nothing.
 682                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 683                         $this->textbox1     = ''; #FIXME: track content object
 684                         $this->summary      = '';
 685                         $this->sectiontitle = '';
 686                         $this->edittime     = '';
 687                         $this->starttime    = wfTimestampNow();
 688                         $this->edit         = false;
 689                         $this->preview      = false;
 690                         $this->save         = false;
 691                         $this->diff         = false;
 692                         $this->minoredit    = false;
 693                         $this->watchthis    = $request->getBool( 'watchthis', false ); // Watch may be overriden by request parameters
 694                         $this->recreate     = false;
 695
 696                         // When creating a new section, we can preload a section title by passing it as the
 697                         // preloadtitle parameter in the URL (Bug 13100)
 698                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 699                                 $this->sectiontitle = $request->getVal( 'preloadtitle' );
 700                                 // Once wpSummary isn't being use for setting section titles, we should delete this.
 701                                 $this->summary = $request->getVal( 'preloadtitle' );
 702                         }
 703                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 704                                 $this->summary = $request->getText( 'summary' );
 705                                 if ( $this->summary !== '' ) {
 706                                         $this->hasPresetSummary = true;
 707                                 }
 708                         }
 709
 710                         if ( $request->getVal( 'minor' ) ) {
 711                                 $this->minoredit = true;
 712                         }
 713                 }
 714
 715                 $this->oldid = $request->getInt( 'oldid' );
 716
 717                 $this->bot = $request->getBool( 'bot', true );
 718                 $this->nosummary = $request->getBool( 'nosummary' );
 719
 720                 $content_handler = ContentHandler::getForTitle( $this->mTitle );
 721                 $this->content_model = $request->getText( 'model', $content_handler->getModelName() ); #may be overridden by revision
 722                 $this->content_format = $request->getText( 'format', $content_handler->getDefaultFormat() ); #may be overridden by revision
 723
 724                 #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
 725                 #TODO: check if the desired content model supports the given content format!
 726
 727                 $this->live = $request->getCheck( 'live' );
 728                 $this->editintro = $request->getText( 'editintro',
 729                         // Custom edit intro for new sections
 730                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 731
 732                 // Allow extensions to modify form data
 733                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 734
 735                 wfProfileOut( __METHOD__ );
 736         }
 737
 738         /**
 739          * Subpage overridable method for extracting the page content data from the
 740          * posted form to be placed in $this->textbox1, if using customized input
 741          * this method should be overrided and return the page text that will be used
 742          * for saving, preview parsing and so on...
 743          *
 744          * @param $request WebRequest
 745          */
 746         protected function importContentFormData( &$request ) {
 747                 return; // Don't do anything, EditPage already extracted wpTextbox1
 748         }
 749
 750         /**
 751          * Initialise form fields in the object
 752          * Called on the first invocation, e.g. when a user clicks an edit link
 753          * @return bool -- if the requested section is valid
 754          */
 755         function initialiseForm() {
 756                 global $wgUser;
 757                 $this->edittime = $this->mArticle->getTimestamp();
 758
 759                 $content = $this->getContentObject( false ); #TODO: track content object?!
 760                 $this->textbox1 = $content->serialize( $this->content_format );
 761
 762                 // activate checkboxes if user wants them to be always active
 763                 # Sort out the "watch" checkbox
 764                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 765                         # Watch all edits
 766                         $this->watchthis = true;
 767                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 768                         # Watch creations
 769                         $this->watchthis = true;
 770                 } elseif ( $this->mTitle->userIsWatching() ) {
 771                         # Already watched
 772                         $this->watchthis = true;
 773                 }
 774                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 775                         $this->minoredit = true;
 776                 }
 777                 if ( $this->textbox1 === false ) {
 778                         return false;
 779                 }
 780                 wfProxyCheck();
 781                 return true;
 782         }
 783
 784         /**
 785          * Fetch initial editing page content.
 786          *
 787          * @param $def_text string
 788          * @return mixed string on success, $def_text for invalid sections
 789          * @private
 790          * @deprecated since 1.WD
 791          */
 792         function getContent( $def_text = false ) { #FIXME: deprecated, replace usage!
 793                 wfDeprecated( __METHOD__, '1.WD' );
 794
 795                 if ( $def_text !== null && $def_text !== false && $def_text !== '' ) {
 796                         $def_content = ContentHandler::makeContent( $def_text, $this->getTitle() );
 797                 } else {
 798                         $def_content = false;
 799                 }
 800
 801                 $content = $this->getContentObject( $def_content );
 802
 803                 return $content->serialize( $this->content_format ); #XXX: really use serialized form? use ContentHandler::getContentText() instead?
 804         }
 805
 806         private function getContentObject( $def_content = null ) { #FIXME: use this!
 807                 global $wgOut, $wgRequest;
 808
 809                 wfProfileIn( __METHOD__ );
 810
 811                 $content = false;
 812
 813                 // For message page not locally set, use the i18n message.
 814                 // For other non-existent articles, use preload text if any.
 815                 if ( !$this->mTitle->exists() || $this->section == 'new' ) {
 816                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $this->section != 'new' ) {
 817                                 # If this is a system message, get the default text.
 818                                 $msg = $this->mTitle->getDefaultMessageText();
 819
 820                                 $content = ContentHandler::makeContent( $msg, $this->mTitle );
 821                         }
 822                         if ( $content === false ) {
 823                                 # If requested, preload some text.
 824                                 $preload = $wgRequest->getVal( 'preload',
 825                                         // Custom preload text for new sections
 826                                         $this->section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 827
 828                                 $content = $this->getPreloadedContent( $preload );
 829                         }
 830                 // For existing pages, get text based on "undo" or section parameters.
 831                 } else {
 832                         if ( $this->section != '' ) {
 833                                 // Get section edit text (returns $def_text for invalid sections)
 834                                 $orig = $this->getOriginalContent();
 835                                 $content = $orig ? $orig->getSection( $this->section ) : null;
 836
 837                                 if ( !$content ) $content = $def_content;
 838                         } else {
 839                                 $undoafter = $wgRequest->getInt( 'undoafter' );
 840                                 $undo = $wgRequest->getInt( 'undo' );
 841
 842                                 if ( $undo > 0 && $undoafter > 0 ) {
 843                                         if ( $undo < $undoafter ) {
 844                                                 # If they got undoafter and undo round the wrong way, switch them
 845                                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 846                                         }
 847
 848                                         $undorev = Revision::newFromId( $undo );
 849                                         $oldrev = Revision::newFromId( $undoafter );
 850
 851                                         # Sanity check, make sure it's the right page,
 852                                         # the revisions exist and they were not deleted.
 853                                         # Otherwise, $content will be left as-is.
 854                                         if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 855                                                 $undorev->getPage() == $oldrev->getPage() &&
 856                                                 $undorev->getPage() == $this->mTitle->getArticleID() &&
 857                                                 !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 858                                                 !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 859
 860                                                 $content = $this->mArticle->getUndoContent( $undorev, $oldrev );
 861
 862                                                 if ( $content === false ) {
 863                                                         # Warn the user that something went wrong
 864                                                         $undoMsg = 'failure';
 865                                                 } else {
 866                                                         # Inform the user of our success and set an automatic edit summary
 867                                                         $undoMsg = 'success';
 868
 869                                                         # If we just undid one rev, use an autosummary
 870                                                         $firstrev = $oldrev->getNext();
 871                                                         if ( $firstrev->getId() == $undo ) {
 872                                                                 $undoSummary = wfMsgForContent( 'undo-summary', $undo, $undorev->getUserText() );
 873                                                                 if ( $this->summary === '' ) {
 874                                                                         $this->summary = $undoSummary;
 875                                                                 } else {
 876                                                                         $this->summary = $undoSummary . wfMsgForContent( 'colon-separator' ) . $this->summary;
 877                                                                 }
 878                                                                 $this->undidRev = $undo;
 879                                                         }
 880                                                         $this->formtype = 'diff';
 881                                                 }
 882                                         } else {
 883                                                 // Failed basic sanity checks.
 884                                                 // Older revisions may have been removed since the link
 885                                                 // was created, or we may simply have got bogus input.
 886                                                 $undoMsg = 'norev';
 887                                         }
 888
 889                                         $class = ( $undoMsg == 'success' ? '' : 'error ' ) . "mw-undo-{$undoMsg}";
 890                                         $this->editFormPageTop .= $wgOut->parse( "<div class=\"{$class}\">" .
 891                                                 wfMsgNoTrans( 'undo-' . $undoMsg ) . '</div>', true, /* interface */true );
 892                                 }
 893
 894                                 if ( $content === false ) {
 895                                         $content = $this->getOriginalContent();
 896                                 }
 897                         }
 898                 }
 899
 900                 wfProfileOut( __METHOD__ );
 901                 return $content;
 902         }
 903
 904         /**
 905          * Get the content of the wanted revision, without section extraction.
 906          *
 907          * The result of this function can be used to compare user's input with
 908          * section replaced in its context (using WikiPage::replaceSection())
 909          * to the original text of the edit.
 910          *
 911          * This difers from Article::getContent() that when a missing revision is
 912          * encountered the result will be an empty string and not the
 913          * 'missing-article' message.
 914          *
 915          * @since 1.19
 916          * @return string
 917          */
 918         private function getOriginalContent() {
 919                 if ( $this->section == 'new' ) {
 920                         return $this->getCurrentContent();
 921                 }
 922                 $revision = $this->mArticle->getRevisionFetched();
 923                 if ( $revision === null ) {
 924                         if ( !$this->content_model ) $this->content_model = $this->getTitle()->getContentModelName();
 925                         $handler = ContentHandler::getForModelName( $this->content_model );
 926
 927                         return $handler->makeEmptyContent();
 928                 }
 929                 $content = $revision->getContent();
 930                 return $content;
 931         }
 932
 933         /**
 934          * Get the current content of the page. This is basically similar to
 935          * WikiPage::getContent( Revision::RAW ) except that when the page doesn't exist an empty
 936          * content object is returned instead of null.
 937          *
 938          * @since 1.WD
 939          * @return string
 940          */
 941         private function getCurrentContent() {
 942                 $rev = $this->mArticle->getRevision();
 943                 $content = $rev ? $rev->getContent( Revision::RAW ) : null;
 944
 945                 if ( $content  === false || $content === null ) {
 946                         if ( !$this->content_model ) $this->content_model = $this->getTitle()->getContentModelName();
 947                         $handler = ContentHandler::getForModelName( $this->content_model );
 948
 949                         return $handler->makeEmptyContent();
 950                 } else {
 951                         #FIXME: nasty side-effect!
 952                         $this->content_model = $rev->getContentModelName();
 953                         $this->content_format = $rev->getContentFormat();
 954
 955                         return $content;
 956                 }
 957         }
 958
 959
 960         /**
 961          * Use this method before edit() to preload some text into the edit box
 962          *
 963          * @param $text string
 964          * @deprecated since 1.WD
 965          */
 966         public function setPreloadedText( $text ) {
 967                 wfDeprecated( __METHOD__, "1.WD" );
 968
 969                 $content = ContentHandler::makeContent( $text, $this->getTitle() );
 970
 971                 $this->setPreloadedContent( $content );
 972         }
 973
 974         /**
 975          * Use this method before edit() to preload some content into the edit box
 976          *
 977          * @param $content Content
 978          *
 979          * @since 1.WD
 980          */
 981         public function setPreloadedContent( Content $content ) {
 982                 $this->mPreloadedContent = $content;
 983         }
 984
 985         /**
 986          * Get the contents to be preloaded into the box, either set by
 987          * an earlier setPreloadText() or by loading the given page.
 988          *
 989          * @param $preload String: representing the title to preload from.
 990          *
 991          * @return String
 992          *
 993          * @deprecated since 1.WD, use getPreloadedContent() instead
 994          */
 995         protected function getPreloadedText( $preload ) { #NOTE: B/C only, replace usage!
 996                 wfDeprecated( __METHOD__, "1.WD" );
 997
 998                 $content = $this->getPreloadedContent( $preload );
 999                 $text = $content->serialize( $this->content_format ); #XXX: really use serialized form? use ContentHandler::getContentText() instead?!
1000
1001                 return $text;
1002         }
1003
1004         /**
1005          * Get the contents to be preloaded into the box, either set by
1006          * an earlier setPreloadText() or by loading the given page.
1007          *
1008          * @param $preload String: representing the title to preload from.
1009          *
1010          * @return Content
1011          *
1012          * @since 1.WD
1013          */
1014         protected function getPreloadedContent( $preload ) { #@todo: use this!
1015                 global $wgUser;
1016
1017                 if ( !empty( $this->mPreloadContent ) ) {
1018                         return $this->mPreloadContent;
1019                 }
1020
1021                 $handler = ContentHandler::getForTitle( $this->getTitle() );
1022
1023                 if ( $preload === '' ) {
1024                         return $handler->makeEmptyContent();
1025                 }
1026
1027                 $title = Title::newFromText( $preload );
1028                 # Check for existence to avoid getting MediaWiki:Noarticletext
1029                 if ( $title === null || !$title->exists() || !$title->userCan( 'read' ) ) {
1030                         return $handler->makeEmptyContent();
1031                 }
1032
1033                 $page = WikiPage::factory( $title );
1034                 if ( $page->isRedirect() ) {
1035                         $title = $page->getRedirectTarget();
1036                         # Same as before
1037                         if ( $title === null || !$title->exists() || !$title->userCan( 'read' ) ) {
1038                                 return $handler->makeEmptyContent();
1039                         }
1040                         $page = WikiPage::factory( $title );
1041                 }
1042
1043                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1044                 $content = $page->getContent( Revision::RAW );
1045
1046                 return $content->preloadTransform( $title, $parserOptions );
1047         }
1048
1049         /**
1050          * Make sure the form isn't faking a user's credentials.
1051          *
1052          * @param $request WebRequest
1053          * @return bool
1054          * @private
1055          */
1056         function tokenOk( &$request ) {
1057                 global $wgUser;
1058                 $token = $request->getVal( 'wpEditToken' );
1059                 $this->mTokenOk = $wgUser->matchEditToken( $token );
1060                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
1061                 return $this->mTokenOk;
1062         }
1063
1064         /**
1065          * Attempt submission
1066          * @return bool false if output is done, true if the rest of the form should be displayed
1067          */
1068         function attemptSave() {
1069                 global $wgUser, $wgOut;
1070
1071                 $resultDetails = false;
1072                 # Allow bots to exempt some edits from bot flagging
1073                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
1074                 $status = $this->internalAttemptSave( $resultDetails, $bot );
1075                 // FIXME: once the interface for internalAttemptSave() is made nicer, this should use the message in $status
1076
1077                 if ( $status->value == self::AS_SUCCESS_UPDATE || $status->value == self::AS_SUCCESS_NEW_ARTICLE ) {
1078                         $this->didSave = true;
1079                 }
1080
1081                 switch ( $status->value ) {
1082                         case self::AS_HOOK_ERROR_EXPECTED:
1083                         case self::AS_CONTENT_TOO_BIG:
1084                         case self::AS_ARTICLE_WAS_DELETED:
1085                         case self::AS_CONFLICT_DETECTED:
1086                         case self::AS_SUMMARY_NEEDED:
1087                         case self::AS_TEXTBOX_EMPTY:
1088                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
1089                         case self::AS_END:
1090                                 return true;
1091
1092                         case self::AS_HOOK_ERROR:
1093                         case self::AS_FILTERING:
1094                                 return false;
1095
1096                         case self::AS_PARSE_ERROR:
1097                                 $wgOut->addWikiText( '<div class="error">' . $status->getWikiText() . '</div>');
1098                                 #FIXME: cause editform to be shown again, not just an error!
1099                                 return false;
1100
1101                         case self::AS_SUCCESS_NEW_ARTICLE:
1102                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
1103                                 $anchor = isset ( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
1104                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
1105                                 return false;
1106
1107                         case self::AS_SUCCESS_UPDATE:
1108                                 $extraQuery = '';
1109                                 $sectionanchor = $resultDetails['sectionanchor'];
1110
1111                                 // Give extensions a chance to modify URL query on update
1112                                 wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this->mArticle, &$sectionanchor, &$extraQuery ) );
1113
1114                                 if ( $resultDetails['redirect'] ) {
1115                                         if ( $extraQuery == '' ) {
1116                                                 $extraQuery = 'redirect=no';
1117                                         } else {
1118                                                 $extraQuery = 'redirect=no&' . $extraQuery;
1119                                         }
1120                                 }
1121                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
1122                                 return false;
1123
1124                         case self::AS_BLANK_ARTICLE:
1125                                 $wgOut->redirect( $this->getContextTitle()->getFullURL() );
1126                                 return false;
1127
1128                         case self::AS_SPAM_ERROR:
1129                                 $this->spamPageWithContent( $resultDetails['spam'] );
1130                                 return false;
1131
1132                         case self::AS_BLOCKED_PAGE_FOR_USER:
1133                                 throw new UserBlockedError( $wgUser->getBlock() );
1134
1135                         case self::AS_IMAGE_REDIRECT_ANON:
1136                         case self::AS_IMAGE_REDIRECT_LOGGED:
1137                                 throw new PermissionsError( 'upload' );
1138
1139                         case self::AS_READ_ONLY_PAGE_ANON:
1140                         case self::AS_READ_ONLY_PAGE_LOGGED:
1141                                 throw new PermissionsError( 'edit' );
1142
1143                         case self::AS_READ_ONLY_PAGE:
1144                                 throw new ReadOnlyError;
1145
1146                         case self::AS_RATE_LIMITED:
1147                                 throw new ThrottledError();
1148
1149                         case self::AS_NO_CREATE_PERMISSION:
1150                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
1151                                 throw new PermissionsError( $permission );
1152
1153                 }
1154                 return false;
1155         }
1156
1157         /**
1158          * Attempt submission (no UI)
1159          *
1160          * @param $result
1161          * @param $bot bool
1162          *
1163          * @return Status object, possibly with a message, but always with one of the AS_* constants in $status->value,
1164          *
1165          * FIXME: This interface is TERRIBLE, but hard to get rid of due to various error display idiosyncrasies. There are
1166          * also lots of cases where error metadata is set in the object and retrieved later instead of being returned, e.g.
1167          * AS_CONTENT_TOO_BIG and AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some time.
1168          */
1169         function internalAttemptSave( &$result, $bot = false ) {
1170                 global $wgFilterCallback, $wgUser, $wgRequest, $wgParser;
1171                 global $wgMaxArticleSize;
1172
1173                 $status = Status::newGood();
1174
1175                 wfProfileIn( __METHOD__  );
1176                 wfProfileIn( __METHOD__ . '-checks' );
1177
1178                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
1179                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
1180                         $status->fatal( 'hookaborted' );
1181                         $status->value = self::AS_HOOK_ERROR;
1182                         wfProfileOut( __METHOD__ . '-checks' );
1183                         wfProfileOut( __METHOD__  );
1184                         return $status;
1185                 }
1186
1187                 # Check image redirect
1188                 if ( $this->mTitle->getNamespace() == NS_FILE &&
1189                         Title::newFromRedirect( $this->textbox1 ) instanceof Title && #FIXME: use content handler to check for redirect
1190                         !$wgUser->isAllowed( 'upload' ) ) {
1191                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
1192                                 $status->setResult( false, $code );
1193
1194                                 wfProfileOut( __METHOD__ . '-checks' );
1195                                 wfProfileOut( __METHOD__  );
1196
1197                                 return $status;
1198                 }
1199
1200                 # Check for spam
1201                 $match = self::matchSummarySpamRegex( $this->summary );
1202                 if ( $match === false ) {
1203                         $match = self::matchSpamRegex( $this->textbox1 );
1204                 }
1205                 if ( $match !== false ) {
1206                         $result['spam'] = $match;
1207                         $ip = $wgRequest->getIP();
1208                         $pdbk = $this->mTitle->getPrefixedDBkey();
1209                         $match = str_replace( "\n", '', $match );
1210                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
1211                         $status->fatal( 'spamprotectionmatch', $match );
1212                         $status->value = self::AS_SPAM_ERROR;
1213                         wfProfileOut( __METHOD__ . '-checks' );
1214                         wfProfileOut( __METHOD__ );
1215                         return $status;
1216                 }
1217                 if ( $wgFilterCallback && is_callable( $wgFilterCallback ) && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
1218                         # Error messages or other handling should be performed by the filter function
1219                         $status->setResult( false, self::AS_FILTERING );
1220                         wfProfileOut( __METHOD__ . '-checks' );
1221                         wfProfileOut( __METHOD__ );
1222                         return $status;
1223                 }
1224                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
1225                         # Error messages etc. could be handled within the hook...
1226                         $status->fatal( 'hookaborted' );
1227                         $status->value = self::AS_HOOK_ERROR;
1228                         wfProfileOut( __METHOD__ . '-checks' );
1229                         wfProfileOut( __METHOD__ );
1230                         return $status;
1231                 } elseif ( $this->hookError != '' ) {
1232                         # ...or the hook could be expecting us to produce an error
1233                         $status->fatal( 'hookaborted' );
1234                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1235                         wfProfileOut( __METHOD__ . '-checks' );
1236                         wfProfileOut( __METHOD__ );
1237                         return $status;
1238                 }
1239
1240                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1241                         // Auto-block user's IP if the account was "hard" blocked
1242                         $wgUser->spreadAnyEditBlock();
1243                         # Check block state against master, thus 'false'.
1244                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1245                         wfProfileOut( __METHOD__ . '-checks' );
1246                         wfProfileOut( __METHOD__ );
1247                         return $status;
1248                 }
1249
1250                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1251                 if ( $this->kblength > $wgMaxArticleSize ) {
1252                         // Error will be displayed by showEditForm()
1253                         $this->tooBig = true;
1254                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1255                         wfProfileOut( __METHOD__ . '-checks' );
1256                         wfProfileOut( __METHOD__ );
1257                         return $status;
1258                 }
1259
1260                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1261                         if ( $wgUser->isAnon() ) {
1262                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1263                                 wfProfileOut( __METHOD__ . '-checks' );
1264                                 wfProfileOut( __METHOD__ );
1265                                 return $status;
1266                         } else {
1267                                 $status->fatal( 'readonlytext' );
1268                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1269                                 wfProfileOut( __METHOD__ . '-checks' );
1270                                 wfProfileOut( __METHOD__ );
1271                                 return $status;
1272                         }
1273                 }
1274
1275                 if ( wfReadOnly() ) {
1276                         $status->fatal( 'readonlytext' );
1277                         $status->value = self::AS_READ_ONLY_PAGE;
1278                         wfProfileOut( __METHOD__ . '-checks' );
1279                         wfProfileOut( __METHOD__ );
1280                         return $status;
1281                 }
1282                 if ( $wgUser->pingLimiter() ) {
1283                         $status->fatal( 'actionthrottledtext' );
1284                         $status->value = self::AS_RATE_LIMITED;
1285                         wfProfileOut( __METHOD__ . '-checks' );
1286                         wfProfileOut( __METHOD__ );
1287                         return $status;
1288                 }
1289
1290                 # If the article has been deleted while editing, don't save it without
1291                 # confirmation
1292                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1293                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1294                         wfProfileOut( __METHOD__ . '-checks' );
1295                         wfProfileOut( __METHOD__ );
1296                         return $status;
1297                 }
1298
1299                 wfProfileOut( __METHOD__ . '-checks' );
1300
1301                 # If article is new, insert it.
1302                 $aid = $this->mTitle->getArticleID( Title::GAID_FOR_UPDATE );
1303                 $new = ( $aid == 0 );
1304
1305                 try {
1306                         if ( $new ) {
1307                                 // Late check for create permission, just in case *PARANOIA*
1308                                 if ( !$this->mTitle->userCan( 'create' ) ) {
1309                                         $status->fatal( 'nocreatetext' );
1310                                         $status->value = self::AS_NO_CREATE_PERMISSION;
1311                                         wfDebug( __METHOD__ . ": no create permission\n" );
1312                                         wfProfileOut( __METHOD__ );
1313                                         return $status;
1314                                 }
1315
1316                                 # Don't save a new article if it's blank.
1317                                 if ( $this->textbox1 == '' ) {
1318                                         $status->setResult( false, self::AS_BLANK_ARTICLE );
1319                                         wfProfileOut( __METHOD__ );
1320                                         return $status;
1321                                 }
1322
1323                                 // Run post-section-merge edit filter
1324                                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
1325                                         # Error messages etc. could be handled within the hook...
1326                                         $status->fatal( 'hookaborted' );
1327                                         $status->value = self::AS_HOOK_ERROR;
1328                                         wfProfileOut( __METHOD__ );
1329                                         return $status;
1330                                 } elseif ( $this->hookError != '' ) {
1331                                         # ...or the hook could be expecting us to produce an error
1332                                         $status->fatal( 'hookaborted' );
1333                                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1334                                         wfProfileOut( __METHOD__ );
1335                                         return $status;
1336                                 }
1337
1338                                 $content = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format );
1339
1340                                 $result['sectionanchor'] = '';
1341                                 if ( $this->section == 'new' ) {
1342                                         if ( $this->sectiontitle !== '' ) {
1343                                                 // Insert the section title above the content.
1344                                                 $content = $content->addSectionHeader( $this->sectiontitle );
1345
1346                                                 // Jump to the new section
1347                                                 $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1348
1349                                                 // If no edit summary was specified, create one automatically from the section
1350                                                 // title and have it link to the new section. Otherwise, respect the summary as
1351                                                 // passed.
1352                                                 if ( $this->summary === '' ) {
1353                                                         $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1354                                                         $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSectionTitle );
1355                                                 }
1356                                         } elseif ( $this->summary !== '' ) {
1357                                                 // Insert the section title above the content.
1358                                                 $content = $content->addSectionHeader( $this->sectiontitle );
1359
1360                                                 // Jump to the new section
1361                                                 $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1362
1363                                                 // Create a link to the new section from the edit summary.
1364                                                 $cleanSummary = $wgParser->stripSectionName( $this->summary );
1365                                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1366                                         }
1367                                 }
1368
1369                                 $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1370
1371                         } else { # not $new
1372
1373                                 # Article exists. Check for edit conflict.
1374
1375                                 $this->mArticle->clear(); # Force reload of dates, etc.
1376                                 $timestamp = $this->mArticle->getTimestamp();
1377
1378                                 wfDebug( "timestamp: {$timestamp}, edittime: {$this->edittime}\n" );
1379
1380                                 if ( $timestamp != $this->edittime ) {
1381                                         $this->isConflict = true;
1382                                         if ( $this->section == 'new' ) {
1383                                                 if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1384                                                         $this->mArticle->getComment() == $this->summary ) {
1385                                                         // Probably a duplicate submission of a new comment.
1386                                                         // This can happen when squid resends a request after
1387                                                         // a timeout but the first one actually went through.
1388                                                         wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
1389                                                 } else {
1390                                                         // New comment; suppress conflict.
1391                                                         $this->isConflict = false;
1392                                                         wfDebug( __METHOD__ . ": conflict suppressed; new section\n" );
1393                                                 }
1394                                         } elseif ( $this->section == '' && $this->userWasLastToEdit( $wgUser->getId(), $this->edittime ) ) {
1395                                                 # Suppress edit conflict with self, except for section edits where merging is required.
1396                                                 wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1397                                                 $this->isConflict = false;
1398                                         }
1399                                 }
1400
1401                                 // If sectiontitle is set, use it, otherwise use the summary as the section title (for
1402                                 // backwards compatibility with old forms/bots).
1403                                 if ( $this->sectiontitle !== '' ) {
1404                                         $sectionTitle = $this->sectiontitle;
1405                                 } else {
1406                                         $sectionTitle = $this->summary;
1407                                 }
1408
1409                                 $textbox_content = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format );
1410                                 $content = null;
1411
1412                                 if ( $this->isConflict ) {
1413                                         wfDebug( __METHOD__ . ": conflict! getting section '$this->section' for time '$this->edittime' (article time '{$timestamp}')\n" );
1414                                         $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle, $this->edittime );
1415                                 } else {
1416                                         wfDebug( __METHOD__ . ": getting section '$this->section'\n" );
1417                                         $content = $this->mArticle->replaceSectionContent( $this->section, $textbox_content, $sectionTitle );
1418                                 }
1419
1420                                 if ( is_null( $content ) ) {
1421                                         wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1422                                         $this->isConflict = true;
1423                                         $content = $textbox_content; // do not try to merge here!
1424                                 } elseif ( $this->isConflict ) {
1425                                         # Attempt merge
1426                                         if ( $this->mergeChangesIntoContent( $textbox_content ) ) {
1427                                                 // Successful merge! Maybe we should tell the user the good news?
1428                                                 $this->isConflict = false;
1429                                                 $content = $textbox_content;
1430                                                 wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1431                                         } else {
1432                                                 $this->section = '';
1433                                                 #$this->textbox1 = $text; #redundant, nothing to do here?
1434                                                 wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1435                                         }
1436                                 }
1437
1438                                 if ( $this->isConflict ) {
1439                                         $status->setResult( false, self::AS_CONFLICT_DETECTED );
1440                                         wfProfileOut( __METHOD__ );
1441                                         return $status;
1442                                 }
1443
1444                                 // Run post-section-merge edit filter
1445                                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $content->serialize( $this->content_format ), &$this->hookError, $this->summary ) )
1446                                                 || !wfRunHooks( 'EditFilterMergedContent', array( $this, $content, &$this->hookError, $this->summary ) ) ) { #FIXME: document new hook
1447                                         # Error messages etc. could be handled within the hook...
1448                                         $status->fatal( 'hookaborted' );
1449                                         $status->value = self::AS_HOOK_ERROR;
1450                                         wfProfileOut( __METHOD__ );
1451                                         return $status;
1452                                 } elseif ( $this->hookError != '' ) {
1453                                         # ...or the hook could be expecting us to produce an error
1454                                         $status->fatal( 'hookaborted' );
1455                                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1456                                         wfProfileOut( __METHOD__ );
1457                                         return $status;
1458                                 }
1459
1460                                 $content = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format );
1461
1462                                 # Handle the user preference to force summaries here, but not for null edits
1463                                 if ( $this->section != 'new' && !$this->allowBlankSummary
1464                                         && !$content->equals( $this->getOriginalContent() )
1465                                         && !$content->isRedirect() ) # check if it's not a redirect
1466                                 {
1467                                         if ( md5( $this->summary ) == $this->autoSumm ) {
1468                                                 $this->missingSummary = true;
1469                                                 $status->fatal( 'missingsummary' );
1470                                                 $status->value = self::AS_SUMMARY_NEEDED;
1471                                                 wfProfileOut( __METHOD__ );
1472                                                 return $status;
1473                                         }
1474                                 }
1475
1476                                 # And a similar thing for new sections
1477                                 if ( $this->section == 'new' && !$this->allowBlankSummary ) {
1478                                         if ( trim( $this->summary ) == '' ) {
1479                                                 $this->missingSummary = true;
1480                                                 $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1481                                                 $status->value = self::AS_SUMMARY_NEEDED;
1482                                                 wfProfileOut( __METHOD__ );
1483                                                 return $status;
1484                                         }
1485                                 }
1486
1487                                 # All's well
1488                                 wfProfileIn( __METHOD__ . '-sectionanchor' );
1489                                 $sectionanchor = '';
1490                                 if ( $this->section == 'new' ) {
1491                                         if ( $this->textbox1 == '' ) {
1492                                                 $this->missingComment = true;
1493                                                 $status->fatal( 'missingcommenttext' );
1494                                                 $status->value = self::AS_TEXTBOX_EMPTY;
1495                                                 wfProfileOut( __METHOD__ . '-sectionanchor' );
1496                                                 wfProfileOut( __METHOD__ );
1497                                                 return $status;
1498                                         }
1499                                         if ( $this->sectiontitle !== '' ) {
1500                                                 $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->sectiontitle );
1501                                                 // If no edit summary was specified, create one automatically from the section
1502                                                 // title and have it link to the new section. Otherwise, respect the summary as
1503                                                 // passed.
1504                                                 if ( $this->summary === '' ) {
1505                                                         $cleanSectionTitle = $wgParser->stripSectionName( $this->sectiontitle );
1506                                                         $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSectionTitle );
1507                                                 }
1508                                         } elseif ( $this->summary !== '' ) {
1509                                                 $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1510                                                 # This is a new section, so create a link to the new section
1511                                                 # in the revision summary.
1512                                                 $cleanSummary = $wgParser->stripSectionName( $this->summary );
1513                                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1514                                         }
1515                                 } elseif ( $this->section != '' ) {
1516                                         # Try to get a section anchor from the section source, redirect to edited section if header found
1517                                         # XXX: might be better to integrate this into Article::replaceSection
1518                                         # for duplicate heading checking and maybe parsing
1519                                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1520                                         # we can't deal with anchors, includes, html etc in the header for now,
1521                                         # headline would need to be parsed to improve this
1522                                         if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1523                                                 $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1524                                         }
1525                                 }
1526                                 $result['sectionanchor'] = $sectionanchor;
1527                                 wfProfileOut( __METHOD__ . '-sectionanchor' );
1528
1529                                 // Save errors may fall down to the edit form, but we've now
1530                                 // merged the section into full text. Clear the section field
1531                                 // so that later submission of conflict forms won't try to
1532                                 // replace that into a duplicated mess.
1533                                         $this->textbox1 = $content->serialize( $this->content_format );
1534                                 $this->section = '';
1535
1536                                 $status->value = self::AS_SUCCESS_UPDATE;
1537                         }
1538
1539                         // Check for length errors again now that the section is merged in
1540                                 $this->kblength = (int)( strlen( $content->serialize( $this->content_format ) ) / 1024 );
1541                         if ( $this->kblength > $wgMaxArticleSize ) {
1542                                 $this->tooBig = true;
1543                                 $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1544                                 wfProfileOut( __METHOD__ );
1545                                 return $status;
1546                         }
1547
1548                         $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1549                                 ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1550                                 ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1551                                 ( $bot ? EDIT_FORCE_BOT : 0 );
1552
1553                                 $doEditStatus = $this->mArticle->doEditContent( $content, $this->summary, $flags, false, null, $this->content_format );
1554
1555                         if ( $doEditStatus->isOK() ) {
1556                                         $result['redirect'] = $content->isRedirect();
1557                                 $this->commitWatch();
1558                                 wfProfileOut( __METHOD__ );
1559                                 return $status;
1560                         } else {
1561                                 $this->isConflict = true;
1562                                 $doEditStatus->value = self::AS_END; // Destroys data doEdit() put in $status->value but who cares
1563                                 wfProfileOut( __METHOD__ );
1564                                 return $doEditStatus;
1565                         }
1566                 } catch (MWContentSerializationException $ex) {
1567                         $status->fatal( 'content-failed-to-parse', $this->content_model, $this->content_format, $ex->getMessage() );
1568                         $status->value = self::AS_PARSE_ERROR;
1569                         wfProfileOut( __METHOD__ );
1570                         return $status;
1571                 }
1572         }
1573
1574         /**
1575          * Commit the change of watch status
1576          */
1577         protected function commitWatch() {
1578                 global $wgUser;
1579                 if ( $this->watchthis xor $this->mTitle->userIsWatching() ) {
1580                         $dbw = wfGetDB( DB_MASTER );
1581                         $dbw->begin( __METHOD__ );
1582                         if ( $this->watchthis ) {
1583                                 WatchAction::doWatch( $this->mTitle, $wgUser );
1584                         } else {
1585                                 WatchAction::doUnwatch( $this->mTitle, $wgUser );
1586                         }
1587                         $dbw->commit( __METHOD__ );
1588                 }
1589         }
1590
1591         /**
1592          * Check if no edits were made by other users since
1593          * the time a user started editing the page. Limit to
1594          * 50 revisions for the sake of performance.
1595          *
1596          * @param $id int
1597          * @param $edittime string
1598          *
1599          * @return bool
1600          */
1601         protected function userWasLastToEdit( $id, $edittime ) {
1602                 if ( !$id ) return false;
1603                 $dbw = wfGetDB( DB_MASTER );
1604                 $res = $dbw->select( 'revision',
1605                         'rev_user',
1606                         array(
1607                                 'rev_page' => $this->mTitle->getArticleID(),
1608                                 'rev_timestamp > ' . $dbw->addQuotes( $dbw->timestamp( $edittime ) )
1609                         ),
1610                         __METHOD__,
1611                         array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
1612                 foreach ( $res as $row ) {
1613                         if ( $row->rev_user != $id ) {
1614                                 return false;
1615                         }
1616                 }
1617                 return true;
1618         }
1619
1620         /**
1621          * @private
1622          * @todo document
1623          *
1624          * @parma $editText string
1625          *
1626          * @return bool
1627          * @deprecated since 1.WD, use mergeChangesIntoContent() instead
1628          */
1629         function mergeChangesInto( &$editText ){
1630                 wfDebug( __METHOD__, "1.WD" );
1631
1632                 $editContent = ContentHandler::makeContent( $editText, $this->getTitle(), $this->content_model, $this->content_format );
1633
1634                 $ok = $this->mergeChangesIntoContent( $editContent );
1635
1636                 if ( $ok ) {
1637                         $editText = $editContent->serialize( $this->content_format ); #XXX: really serialize?!
1638                         return true;
1639                 } else {
1640                         return false;
1641                 }
1642         }
1643
1644         /**
1645          * @private
1646          * @todo document
1647          *
1648          * @parma $editText string
1649          *
1650          * @return bool
1651          * @since since 1.WD
1652          */
1653         private function mergeChangesIntoContent( &$editContent ){
1654                 wfProfileIn( __METHOD__ );
1655
1656                 $db = wfGetDB( DB_MASTER );
1657
1658                 // This is the revision the editor started from
1659                 $baseRevision = $this->getBaseRevision();
1660                 if ( is_null( $baseRevision ) ) {
1661                         wfProfileOut( __METHOD__ );
1662                         return false;
1663                 }
1664                 $baseContent = $baseRevision->getContent();
1665
1666                 // The current state, we want to merge updates into it
1667                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1668                 if ( is_null( $currentRevision ) ) {
1669                         wfProfileOut( __METHOD__ );
1670                         return false;
1671                 }
1672                 $currentContent = $currentRevision->getContent();
1673
1674                 $handler = ContentHandler::getForModelName( $baseContent->getModelName() );
1675
1676                 $result = $handler->merge3( $baseContent, $editContent, $currentContent );
1677
1678                 if ( $result ) {
1679                         $editContent = $result;
1680                         wfProfileOut( __METHOD__ );
1681                         return true;
1682                 } else {
1683                         wfProfileOut( __METHOD__ );
1684                         return false;
1685                 }
1686         }
1687
1688         /**
1689          * @return Revision
1690          */
1691         function getBaseRevision() {
1692                 if ( !$this->mBaseRevision ) {
1693                         $db = wfGetDB( DB_MASTER );
1694                         $baseRevision = Revision::loadFromTimestamp(
1695                                 $db, $this->mTitle, $this->edittime );
1696                         return $this->mBaseRevision = $baseRevision;
1697                 } else {
1698                         return $this->mBaseRevision;
1699                 }
1700         }
1701
1702         /**
1703          * Check given input text against $wgSpamRegex, and return the text of the first match.
1704          *
1705          * @param $text string
1706          *
1707          * @return string|bool matching string or false
1708          */
1709         public static function matchSpamRegex( $text ) {
1710                 global $wgSpamRegex;
1711                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1712                 $regexes = (array)$wgSpamRegex;
1713                 return self::matchSpamRegexInternal( $text, $regexes );
1714         }
1715
1716         /**
1717          * Check given input text against $wgSpamRegex, and return the text of the first match.
1718          *
1719          * @parma $text string
1720          *
1721          * @return string|bool  matching string or false
1722          */
1723         public static function matchSummarySpamRegex( $text ) {
1724                 global $wgSummarySpamRegex;
1725                 $regexes = (array)$wgSummarySpamRegex;
1726                 return self::matchSpamRegexInternal( $text, $regexes );
1727         }
1728
1729         /**
1730          * @param $text string
1731          * @param $regexes array
1732          * @return bool|string
1733          */
1734         protected static function matchSpamRegexInternal( $text, $regexes ) {
1735                 foreach ( $regexes as $regex ) {
1736                         $matches = array();
1737                         if ( preg_match( $regex, $text, $matches ) ) {
1738                                 return $matches[0];
1739                         }
1740                 }
1741                 return false;
1742         }
1743
1744         function setHeaders() {
1745                 global $wgOut, $wgUser;
1746
1747                 $wgOut->addModules( 'mediawiki.action.edit' );
1748
1749                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
1750                         $wgOut->addModules( 'mediawiki.legacy.preview' );
1751                 }
1752                 // Bug #19334: textarea jumps when editing articles in IE8
1753                 $wgOut->addStyle( 'common/IE80Fixes.css', 'screen', 'IE 8' );
1754
1755                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1756
1757                 # Enabled article-related sidebar, toplinks, etc.
1758                 $wgOut->setArticleRelated( true );
1759
1760                 $contextTitle = $this->getContextTitle();
1761                 if ( $this->isConflict ) {
1762                         $msg = 'editconflict';
1763                 } elseif ( $contextTitle->exists() && $this->section != '' ) {
1764                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1765                 } else {
1766                         $msg = $contextTitle->exists() || ( $contextTitle->getNamespace() == NS_MEDIAWIKI && $contextTitle->getDefaultMessageText() !== false ) ?
1767                                 'editing' : 'creating';
1768                 }
1769                 # Use the title defined by DISPLAYTITLE magic word when present
1770                 $displayTitle = isset( $this->mParserOutput ) ? $this->mParserOutput->getDisplayTitle() : false;
1771                 if ( $displayTitle === false ) {
1772                         $displayTitle = $contextTitle->getPrefixedText();
1773                 }
1774                 $wgOut->setPageTitle( wfMessage( $msg, $displayTitle ) );
1775         }
1776
1777         /**
1778          * Show all applicable editing introductions
1779          */
1780         protected function showIntro() {
1781                 global $wgOut, $wgUser;
1782                 if ( $this->suppressIntro ) {
1783                         return;
1784                 }
1785
1786                 $namespace = $this->mTitle->getNamespace();
1787
1788                 if ( $namespace == NS_MEDIAWIKI ) {
1789                         # Show a warning if editing an interface message
1790                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
1791                 } else if( $namespace == NS_FILE ) {
1792                         # Show a hint to shared repo
1793                         $file = wfFindFile( $this->mTitle );
1794                         if( $file && !$file->isLocal() ) {
1795                                 $descUrl = $file->getDescriptionUrl();
1796                                 # there must be a description url to show a hint to shared repo
1797                                 if( $descUrl ) {
1798                                         if( !$this->mTitle->exists() ) {
1799                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-create\">\n$1\n</div>", array (
1800                                                                         'sharedupload-desc-create', $file->getRepo()->getDisplayName(), $descUrl
1801                                                 ) );
1802                                         } else {
1803                                                 $wgOut->wrapWikiMsg( "<div class=\"mw-sharedupload-desc-edit\">\n$1\n</div>", array(
1804                                                                         'sharedupload-desc-edit', $file->getRepo()->getDisplayName(), $descUrl
1805                                                 ) );
1806                                         }
1807                                 }
1808                         }
1809                 }
1810
1811                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
1812                 # Show log extract when the user is currently blocked
1813                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
1814                         $parts = explode( '/', $this->mTitle->getText(), 2 );
1815                         $username = $parts[0];
1816                         $user = User::newFromName( $username, false /* allow IP users*/ );
1817                         $ip = User::isIP( $username );
1818                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
1819                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
1820                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
1821                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
1822                                 LogEventsList::showLogExtract(
1823                                         $wgOut,
1824                                         'block',
1825                                         $user->getUserPage(),
1826                                         '',
1827                                         array(
1828                                                 'lim' => 1,
1829                                                 'showIfEmpty' => false,
1830                                                 'msgKey' => array(
1831                                                         'blocked-notice-logextract',
1832                                                         $user->getName() # Support GENDER in notice
1833                                                 )
1834                                         )
1835                                 );
1836                         }
1837                 }
1838                 # Try to add a custom edit intro, or use the standard one if this is not possible.
1839                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
1840                         if ( $wgUser->isLoggedIn() ) {
1841                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1\n</div>", 'newarticletext' );
1842                         } else {
1843                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1\n</div>", 'newarticletextanon' );
1844                         }
1845                 }
1846                 # Give a notice if the user is editing a deleted/moved page...
1847                 if ( !$this->mTitle->exists() ) {
1848                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
1849                                 '', array( 'lim' => 10,
1850                                            'conds' => array( "log_action != 'revision'" ),
1851                                            'showIfEmpty' => false,
1852                                            'msgKey' => array( 'recreate-moveddeleted-warn' ) )
1853                         );
1854                 }
1855         }
1856
1857         /**
1858          * Attempt to show a custom editing introduction, if supplied
1859          *
1860          * @return bool
1861          */
1862         protected function showCustomIntro() {
1863                 if ( $this->editintro ) {
1864                         $title = Title::newFromText( $this->editintro );
1865                         if ( $title instanceof Title && $title->exists() && $title->userCan( 'read' ) ) {
1866                                 global $wgOut;
1867                                 // Added using template syntax, to take <noinclude>'s into account.
1868                                 $wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
1869                                 return true;
1870                         } else {
1871                                 return false;
1872                         }
1873                 } else {
1874                         return false;
1875                 }
1876         }
1877
1878         /**
1879          * Send the edit form and related headers to $wgOut
1880          * @param $formCallback Callback that takes an OutputPage parameter; will be called
1881          *     during form output near the top, for captchas and the like.
1882          */
1883         function showEditForm( $formCallback = null ) {
1884                 global $wgOut, $wgUser;
1885
1886                 wfProfileIn( __METHOD__ );
1887
1888                 # need to parse the preview early so that we know which templates are used,
1889                 # otherwise users with "show preview after edit box" will get a blank list
1890                 # we parse this near the beginning so that setHeaders can do the title
1891                 # setting work instead of leaving it in getPreviewText
1892                 $previewOutput = '';
1893                 if ( $this->formtype == 'preview' ) {
1894                         $previewOutput = $this->getPreviewText();
1895                 }
1896
1897                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this, &$wgOut ) );
1898
1899                 $this->setHeaders();
1900
1901                 if ( $this->showHeader() === false ) {
1902                         wfProfileOut( __METHOD__ );
1903                         return;
1904                 }
1905
1906                 $wgOut->addHTML( $this->editFormPageTop );
1907
1908                 if ( $wgUser->getOption( 'previewontop' ) ) {
1909                         $this->displayPreviewArea( $previewOutput, true );
1910                 }
1911
1912                 $wgOut->addHTML( $this->editFormTextTop );
1913
1914                 $showToolbar = true;
1915                 if ( $this->wasDeletedSinceLastEdit() ) {
1916                         if ( $this->formtype == 'save' ) {
1917                                 // Hide the toolbar and edit area, user can click preview to get it back
1918                                 // Add an confirmation checkbox and explanation.
1919                                 $showToolbar = false;
1920                         } else {
1921                                 $wgOut->wrapWikiMsg( "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
1922                                         'deletedwhileediting' );
1923                         }
1924                 }
1925
1926                 #FIXME: add EditForm plugin interface and use it here! #FIXME: search for textarea1 and textares2, and allow EditForm to override all uses.
1927                 $wgOut->addHTML( Html::openElement( 'form', array( 'id' => self::EDITFORM_ID, 'name' => self::EDITFORM_ID,
1928                         'method' => 'post', 'action' => $this->getActionURL( $this->getContextTitle() ),
1929                         'enctype' => 'multipart/form-data' ) ) );
1930
1931                 if ( is_callable( $formCallback ) ) {
1932                         call_user_func_array( $formCallback, array( &$wgOut ) );
1933                 }
1934
1935                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1936
1937                 // Put these up at the top to ensure they aren't lost on early form submission
1938                 $this->showFormBeforeText();
1939
1940                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
1941                         $username = $this->lastDelete->user_name;
1942                         $comment = $this->lastDelete->log_comment;
1943
1944                         // It is better to not parse the comment at all than to have templates expanded in the middle
1945                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
1946                         $key = $comment === ''
1947                                 ? 'confirmrecreate-noreason'
1948                                 : 'confirmrecreate';
1949                         $wgOut->addHTML(
1950                                 '<div class="mw-confirm-recreate">' .
1951                                 wfMsgExt( $key, 'parseinline', $username, "<nowiki>$comment</nowiki>" ) .
1952                                 Xml::checkLabel( wfMsg( 'recreate' ), 'wpRecreate', 'wpRecreate', false,
1953                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
1954                                 ) .
1955                                 '</div>'
1956                         );
1957                 }
1958
1959                 # When the summary is hidden, also hide them on preview/show changes
1960                 if( $this->nosummary ) {
1961                         $wgOut->addHTML( Html::hidden( 'nosummary', true ) );
1962                 }
1963
1964                 # If a blank edit summary was previously provided, and the appropriate
1965                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1966                 # user being bounced back more than once in the event that a summary
1967                 # is not required.
1968                 #####
1969                 # For a bit more sophisticated detection of blank summaries, hash the
1970                 # automatic one and pass that in the hidden field wpAutoSummary.
1971                 if ( $this->missingSummary || ( $this->section == 'new' && $this->nosummary ) ) {
1972                         $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
1973                 }
1974
1975                 if ( $this->hasPresetSummary ) {
1976                         // If a summary has been preset using &summary= we dont want to prompt for
1977                         // a different summary. Only prompt for a summary if the summary is blanked.
1978                         // (Bug 17416)
1979                         $this->autoSumm = md5( '' );
1980                 }
1981
1982                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1983                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
1984
1985                 $wgOut->addHTML( Html::hidden( 'oldid', $this->oldid ) );
1986
1987                 $wgOut->addHTML( Html::hidden( 'format', $this->content_format ) );
1988                 $wgOut->addHTML( Html::hidden( 'model', $this->content_model ) );
1989
1990                 if ( $this->section == 'new' ) {
1991                         $this->showSummaryInput( true, $this->summary );
1992                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
1993                 }
1994
1995                 $wgOut->addHTML( $this->editFormTextBeforeContent );
1996
1997                 if ( !$this->isCssJsSubpage && $showToolbar && $wgUser->getOption( 'showtoolbar' ) ) {
1998                         $wgOut->addHTML( EditPage::getEditToolbar() );
1999                 }
2000
2001                 if ( $this->isConflict ) {
2002                         // In an edit conflict bypass the overrideable content form method
2003                         // and fallback to the raw wpTextbox1 since editconflicts can't be
2004                         // resolved between page source edits and custom ui edits using the
2005                         // custom edit ui.
2006                         $this->textbox2 = $this->textbox1;
2007
2008                         $content = $this->getCurrentContent();
2009                         $this->textbox1 = $content->serialize( $this->content_format );
2010
2011                         $this->showTextbox1();
2012                 } else {
2013                         $this->showContentForm();
2014                 }
2015
2016                 $wgOut->addHTML( $this->editFormTextAfterContent );
2017
2018                 $wgOut->addWikiText( $this->getCopywarn() );
2019
2020                 $wgOut->addHTML( $this->editFormTextAfterWarn );
2021
2022                 $this->showStandardInputs();
2023
2024                 $this->showFormAfterText();
2025
2026                 $this->showTosSummary();
2027
2028                 $this->showEditTools();
2029
2030                 $wgOut->addHTML( $this->editFormTextAfterTools . "\n" );
2031
2032                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
2033                         Linker::formatTemplates( $this->getTemplates(), $this->preview, $this->section != '' ) ) );
2034
2035                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'hiddencats' ),
2036                         Linker::formatHiddenCategories( $this->mArticle->getHiddenCategories() ) ) );
2037
2038                 if ( $this->isConflict ) {
2039                         $this->showConflict();
2040                 }
2041
2042                 $wgOut->addHTML( $this->editFormTextBottom . "\n</form>\n" );
2043
2044                 if ( !$wgUser->getOption( 'previewontop' ) ) {
2045                         $this->displayPreviewArea( $previewOutput, false );
2046                 }
2047
2048                 wfProfileOut( __METHOD__ );
2049         }
2050
2051         /**
2052          * Extract the section title from current section text, if any.
2053          *
2054          * @param string $text
2055          * @return Mixed|string or false
2056          */
2057         public static function extractSectionTitle( $text ) {
2058                 preg_match( "/^(=+)(.+)\\1\\s*(\n|$)/i", $text, $matches );
2059                 if ( !empty( $matches[2] ) ) {
2060                         global $wgParser;
2061                         return $wgParser->stripSectionName( trim( $matches[2] ) );
2062                 } else {
2063                         return false;
2064                 }
2065         }
2066
2067         protected function showHeader() {
2068                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
2069
2070                 if ( $this->mTitle->isTalkPage() ) {
2071                         $wgOut->addWikiMsg( 'talkpagetext' );
2072                 }
2073
2074                 # Optional notices on a per-namespace and per-page basis
2075                 $editnotice_ns = 'editnotice-' . $this->mTitle->getNamespace();
2076                 $editnotice_ns_message = wfMessage( $editnotice_ns )->inContentLanguage();
2077                 if ( $editnotice_ns_message->exists() ) {
2078                         $wgOut->addWikiText( $editnotice_ns_message->plain() );
2079                 }
2080                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
2081                         $parts = explode( '/', $this->mTitle->getDBkey() );
2082                         $editnotice_base = $editnotice_ns;
2083                         while ( count( $parts ) > 0 ) {
2084                                 $editnotice_base .= '-' . array_shift( $parts );
2085                                 $editnotice_base_msg = wfMessage( $editnotice_base )->inContentLanguage();
2086                                 if ( $editnotice_base_msg->exists() ) {
2087                                         $wgOut->addWikiText( $editnotice_base_msg->plain() );
2088                                 }
2089                         }
2090                 } else {
2091                         # Even if there are no subpages in namespace, we still don't want / in MW ns.
2092                         $editnoticeText = $editnotice_ns . '-' . str_replace( '/', '-', $this->mTitle->getDBkey() );
2093                         $editnoticeMsg = wfMessage( $editnoticeText )->inContentLanguage();
2094                         if ( $editnoticeMsg->exists() ) {
2095                                 $wgOut->addWikiText( $editnoticeMsg->plain() );
2096                         }
2097                 }
2098
2099                 if ( $this->isConflict ) {
2100                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
2101                         $this->edittime = $this->mArticle->getTimestamp();
2102                 } else {
2103                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
2104                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
2105                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
2106                                 // Someone is welcome to try refactoring though
2107                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
2108                                 return false;
2109                         }
2110
2111                         if ( $this->section != '' && $this->section != 'new' ) {
2112                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
2113                                         $sectionTitle = self::extractSectionTitle( $this->textbox1 );
2114                                         if ( $sectionTitle !== false ) {
2115                                                 $this->summary = "/* $sectionTitle */ ";
2116                                         }
2117                                 }
2118                         }
2119
2120                         if ( $this->missingComment ) {
2121                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
2122                         }
2123
2124                         if ( $this->missingSummary && $this->section != 'new' ) {
2125                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
2126                         }
2127
2128                         if ( $this->missingSummary && $this->section == 'new' ) {
2129                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
2130                         }
2131
2132                         if ( $this->hookError !== '' ) {
2133                                 $wgOut->addWikiText( $this->hookError );
2134                         }
2135
2136                         if ( !$this->checkUnicodeCompliantBrowser() ) {
2137                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
2138                         }
2139
2140                         if ( $this->section != 'new' ) {
2141                                 $revision = $this->mArticle->getRevisionFetched();
2142                                 if ( $revision ) {
2143                                         // Let sysop know that this will make private content public if saved
2144
2145                                         if ( !$revision->userCan( Revision::DELETED_TEXT ) ) {
2146                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
2147                                         } elseif ( $revision->isDeleted( Revision::DELETED_TEXT ) ) {
2148                                                 $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
2149                                         }
2150
2151                                         if ( !$revision->isCurrent() ) {
2152                                                 $this->mArticle->setOldSubtitle( $revision->getId() );
2153                                                 $wgOut->addWikiMsg( 'editingold' );
2154                                         }
2155                                 } elseif ( $this->mTitle->exists() ) {
2156                                         // Something went wrong
2157
2158                                         $wgOut->wrapWikiMsg( "<div class='errorbox'>\n$1\n</div>\n",
2159                                                 array( 'missing-article', $this->mTitle->getPrefixedText(),
2160                                                 wfMsgNoTrans( 'missingarticle-rev', $this->oldid ) ) );
2161                                 }
2162                         }
2163                 }
2164
2165                 if ( wfReadOnly() ) {
2166                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
2167                 } elseif ( $wgUser->isAnon() ) {
2168                         if ( $this->formtype != 'preview' ) {
2169                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
2170                         } else {
2171                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
2172                         }
2173                 } else {
2174                         if ( $this->isCssJsSubpage ) {
2175                                 # Check the skin exists
2176                                 if ( $this->isWrongCaseCssJsPage ) {
2177                                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
2178                                 }
2179                                 if ( $this->formtype !== 'preview' ) {
2180                                         if ( $this->isCssSubpage )
2181                                                 $wgOut->wrapWikiMsg( "<div id='mw-usercssyoucanpreview'>\n$1\n</div>", array( 'usercssyoucanpreview' ) );
2182                                         if ( $this->isJsSubpage )
2183                                                 $wgOut->wrapWikiMsg( "<div id='mw-userjsyoucanpreview'>\n$1\n</div>", array( 'userjsyoucanpreview' ) );
2184                                 }
2185                         }
2186                 }
2187
2188                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2189                         # Is the title semi-protected?
2190                         if ( $this->mTitle->isSemiProtected() ) {
2191                                 $noticeMsg = 'semiprotectedpagewarning';
2192                         } else {
2193                                 # Then it must be protected based on static groups (regular)
2194                                 $noticeMsg = 'protectedpagewarning';
2195                         }
2196                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2197                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
2198                 }
2199                 if ( $this->mTitle->isCascadeProtected() ) {
2200                         # Is this page under cascading protection from some source pages?
2201                         list( $cascadeSources, /* $restrictions */ ) = $this->mTitle->getCascadeProtectionSources();
2202                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
2203                         $cascadeSourcesCount = count( $cascadeSources );
2204                         if ( $cascadeSourcesCount > 0 ) {
2205                                 # Explain, and list the titles responsible
2206                                 foreach ( $cascadeSources as $page ) {
2207                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
2208                                 }
2209                         }
2210                         $notice .= '</div>';
2211                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
2212                 }
2213                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
2214                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
2215                                 array( 'lim' => 1,
2216                                         'showIfEmpty' => false,
2217                                         'msgKey' => array( 'titleprotectedwarning' ),
2218                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
2219                 }
2220
2221                 if ( $this->kblength === false ) {
2222                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
2223                 }
2224
2225                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
2226                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
2227                                 array( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) ) );
2228                 } else {
2229                         if ( !wfMessage( 'longpage-hint' )->isDisabled() ) {
2230                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
2231                                         array( 'longpage-hint', $wgLang->formatSize( strlen( $this->textbox1 ) ), strlen( $this->textbox1 ) )
2232                                 );
2233                         }
2234                 }
2235         }
2236
2237         /**
2238          * Standard summary input and label (wgSummary), abstracted so EditPage
2239          * subclasses may reorganize the form.
2240          * Note that you do not need to worry about the label's for=, it will be
2241          * inferred by the id given to the input. You can remove them both by
2242          * passing array( 'id' => false ) to $userInputAttrs.
2243          *
2244          * @param $summary string The value of the summary input
2245          * @param $labelText string The html to place inside the label
2246          * @param $inputAttrs array of attrs to use on the input
2247          * @param $spanLabelAttrs array of attrs to use on the span inside the label
2248          *
2249          * @return array An array in the format array( $label, $input )
2250          */
2251         function getSummaryInput( $summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null ) {
2252                 // Note: the maxlength is overriden in JS to 250 and to make it use UTF-8 bytes, not characters.
2253                 $inputAttrs = ( is_array( $inputAttrs ) ? $inputAttrs : array() ) + array(
2254                         'id' => 'wpSummary',
2255                         'maxlength' => '200',
2256                         'tabindex' => '1',
2257                         'size' => 60,
2258                         'spellcheck' => 'true',
2259                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
2260
2261                 $spanLabelAttrs = ( is_array( $spanLabelAttrs ) ? $spanLabelAttrs : array() ) + array(
2262                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
2263                         'id' => "wpSummaryLabel"
2264                 );
2265
2266                 $label = null;
2267                 if ( $labelText ) {
2268                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
2269                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
2270                 }
2271
2272                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
2273
2274                 return array( $label, $input );
2275         }
2276
2277         /**
2278          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2279          *                          up top, or false if this is the comment summary
2280          *                          down below the textarea
2281          * @param $summary String: The text of the summary to display
2282          * @return String
2283          */
2284         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
2285                 global $wgOut, $wgContLang;
2286                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
2287                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
2288                 if ( $isSubjectPreview ) {
2289                         if ( $this->nosummary ) {
2290                                 return;
2291                         }
2292                 } else {
2293                         if ( !$this->mShowSummaryField ) {
2294                                 return;
2295                         }
2296                 }
2297                 $summary = $wgContLang->recodeForEdit( $summary );
2298                 $labelText = wfMsgExt( $isSubjectPreview ? 'subject' : 'summary', 'parseinline' );
2299                 list( $label, $input ) = $this->getSummaryInput( $summary, $labelText, array( 'class' => $summaryClass ), array() );
2300                 $wgOut->addHTML( "{$label} {$input}" );
2301         }
2302
2303         /**
2304          * @param $isSubjectPreview Boolean: true if this is the section subject/title
2305          *                          up top, or false if this is the comment summary
2306          *                          down below the textarea
2307          * @param $summary String: the text of the summary to display
2308          * @return String
2309          */
2310         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
2311                 if ( !$summary || ( !$this->preview && !$this->diff ) )
2312                         return "";
2313
2314                 global $wgParser;
2315
2316                 if ( $isSubjectPreview )
2317                         $summary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $summary ) );
2318
2319                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
2320
2321                 $summary = wfMsgExt( $message, 'parseinline' ) . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
2322                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
2323         }
2324
2325         protected function showFormBeforeText() {
2326                 global $wgOut;
2327                 $section = htmlspecialchars( $this->section );
2328                 $wgOut->addHTML( <<<HTML
2329 <input type='hidden' value="{$section}" name="wpSection" />
2330 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
2331 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
2332 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
2333
2334 HTML
2335                 );
2336                 if ( !$this->checkUnicodeCompliantBrowser() )
2337                         $wgOut->addHTML( Html::hidden( 'safemode', '1' ) );
2338         }
2339
2340         protected function showFormAfterText() {
2341                 global $wgOut, $wgUser;
2342                 /**
2343                  * To make it harder for someone to slip a user a page
2344                  * which submits an edit form to the wiki without their
2345                  * knowledge, a random token is associated with the login
2346                  * session. If it's not passed back with the submission,
2347                  * we won't save the page, or render user JavaScript and
2348                  * CSS previews.
2349                  *
2350                  * For anon editors, who may not have a session, we just
2351                  * include the constant suffix to prevent editing from
2352                  * broken text-mangling proxies.
2353                  */
2354                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
2355         }
2356
2357         /**
2358          * Subpage overridable method for printing the form for page content editing
2359          * By default this simply outputs wpTextbox1
2360          * Subclasses can override this to provide a custom UI for editing;
2361          * be it a form, or simply wpTextbox1 with a modified content that will be
2362          * reverse modified when extracted from the post data.
2363          * Note that this is basically the inverse for importContentFormData
2364          */
2365         protected function showContentForm() {
2366                 $this->showTextbox1();
2367         }
2368
2369         /**
2370          * Method to output wpTextbox1
2371          * The $textoverride method can be used by subclasses overriding showContentForm
2372          * to pass back to this method.
2373          *
2374          * @param $customAttribs array of html attributes to use in the textarea
2375          * @param $textoverride String: optional text to override $this->textarea1 with
2376          */
2377         protected function showTextbox1( $customAttribs = null, $textoverride = null ) {
2378                 if ( $this->wasDeletedSinceLastEdit() && $this->formtype == 'save' ) {
2379                         $attribs = array( 'style' => 'display:none;' );
2380                 } else {
2381                         $classes = array(); // Textarea CSS
2382                         if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
2383                                 # Is the title semi-protected?
2384                                 if ( $this->mTitle->isSemiProtected() ) {
2385                                         $classes[] = 'mw-textarea-sprotected';
2386                                 } else {
2387                                         # Then it must be protected based on static groups (regular)
2388                                         $classes[] = 'mw-textarea-protected';
2389                                 }
2390                                 # Is the title cascade-protected?
2391                                 if ( $this->mTitle->isCascadeProtected() ) {
2392                                         $classes[] = 'mw-textarea-cprotected';
2393                                 }
2394                         }
2395
2396                         $attribs = array( 'tabindex' => 1 );
2397
2398                         if ( is_array( $customAttribs ) ) {
2399                                 $attribs += $customAttribs;
2400                         }
2401
2402                         if ( count( $classes ) ) {
2403                                 if ( isset( $attribs['class'] ) ) {
2404                                         $classes[] = $attribs['class'];
2405                                 }
2406                                 $attribs['class'] = implode( ' ', $classes );
2407                         }
2408                 }
2409
2410                 $this->showTextbox( $textoverride !== null ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
2411         }
2412
2413         protected function showTextbox2() {
2414                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2415         }
2416
2417         protected function showTextbox( $text, $name, $customAttribs = array() ) {
2418                 global $wgOut, $wgUser;
2419
2420                 $wikitext = $this->safeUnicodeOutput( $text );
2421                 if ( strval( $wikitext ) !== '' ) {
2422                         // Ensure there's a newline at the end, otherwise adding lines
2423                         // is awkward.
2424                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2425                         // mode will show an extra newline. A bit annoying.
2426                         $wikitext .= "\n";
2427                 }
2428
2429                 $attribs = $customAttribs + array(
2430                         'accesskey' => ',',
2431                         'id'   => $name,
2432                         'cols' => $wgUser->getIntOption( 'cols' ),
2433                         'rows' => $wgUser->getIntOption( 'rows' ),
2434                         'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
2435                 );
2436
2437                 $pageLang = $this->mTitle->getPageLanguage();
2438                 $attribs['lang'] = $pageLang->getCode();
2439                 $attribs['dir'] = $pageLang->getDir();
2440
2441                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2442         }
2443
2444         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2445                 global $wgOut;
2446                 $classes = array();
2447                 if ( $isOnTop )
2448                         $classes[] = 'ontop';
2449
2450                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2451
2452                 if ( $this->formtype != 'preview' )
2453                         $attribs['style'] = 'display: none;';
2454
2455                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
2456
2457                 if ( $this->formtype == 'preview' ) {
2458                         $this->showPreview( $previewOutput );
2459                 }
2460
2461                 $wgOut->addHTML( '</div>' );
2462
2463                 if ( $this->formtype == 'diff' ) {
2464                         $this->showDiff();
2465                 }
2466         }
2467
2468         /**
2469          * Append preview output to $wgOut.
2470          * Includes category rendering if this is a category page.
2471          *
2472          * @param $text String: the HTML to be output for the preview.
2473          */
2474         protected function showPreview( $text ) {
2475                 global $wgOut;
2476                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2477                         $this->mArticle->openShowCategory();
2478                 }
2479                 # This hook seems slightly odd here, but makes things more
2480                 # consistent for extensions.
2481                 wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$text ) );
2482                 $wgOut->addHTML( $text );
2483                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2484                         $this->mArticle->closeShowCategory();
2485                 }
2486         }
2487
2488         /**
2489          * Get a diff between the current contents of the edit box and the
2490          * version of the page we're editing from.
2491          *
2492          * If this is a section edit, we'll replace the section as for final
2493          * save and then make a comparison.
2494          */
2495         function showDiff() {
2496                 global $wgUser, $wgContLang, $wgParser, $wgOut;
2497
2498                 $oldtitlemsg = 'currentrev';
2499                 # if message does not exist, show diff against the preloaded default
2500                 if( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mTitle->exists() ) {
2501                         $oldtext = $this->mTitle->getDefaultMessageText();
2502                         if( $oldtext !== false ) {
2503                                 $oldtitlemsg = 'defaultmessagetext';
2504                                 $oldContent = ContentHandler::makeContent( $oldtext, $this->mTitle );
2505                         } else {
2506                                 $oldContent = null;
2507                         }
2508                 } else {
2509                         $oldContent = $this->getOriginalContent();
2510                 }
2511
2512                 $textboxContent = ContentHandler::makeContent( $this->textbox1, $this->getTitle(),
2513                                                                                                                 $this->content_model, $this->content_format ); #XXX: handle parse errors ?
2514
2515                 $newContent = $this->mArticle->replaceSectionContent(
2516                                                                                                         $this->section, $textboxContent,
2517                                                                                                         $this->summary, $this->edittime );
2518
2519                 # hanlde legacy text-based hook
2520                 $newtext_orig = $newContent->serialize( $this->content_format );
2521                 $newtext = $newtext_orig; #clone
2522                 wfRunHooks( 'EditPageGetDiffText', array( $this, &$newtext ) );
2523
2524                 if ( $newtext != $newtext_orig ) {
2525                                                 #if the hook changed the text, create a new Content object accordingly.
2526                                                 $newContent = ContentHandler::makeContent( $newtext, $this->getTitle(), $newContent->getModelName() ); #XXX: handle parse errors ?
2527                 }
2528
2529                 wfRunHooks( 'EditPageGetDiffContent', array( $this, &$newContent ) ); #FIXME: document new hook
2530
2531                 $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
2532                 $newContent = $newContent->preSaveTransform( $this->mTitle, $wgUser, $popts );
2533
2534                 if ( ( $oldContent && !$oldContent->isEmpty() ) || ( $newContent && !$newContent->isEmpty() ) ) {
2535                         $oldtitle = wfMsgExt( $oldtitlemsg, array( 'parseinline' ) );
2536                         $newtitle = wfMsgExt( 'yourtext', array( 'parseinline' ) );
2537
2538                         $de = $oldContent->getContentHandler()->createDifferenceEngine( $this->mArticle->getContext() );
2539                         $de->setContent( $oldContent, $newContent );
2540
2541                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2542                         $de->showDiffStyle();
2543                 } else {
2544                         $difftext = '';
2545                 }
2546
2547                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2548         }
2549
2550         /**
2551          * Give a chance for site and per-namespace customizations of
2552          * terms of service summary link that might exist separately
2553          * from the copyright notice.
2554          *
2555          * This will display between the save button and the edit tools,
2556          * so should remain short!
2557          */
2558         protected function showTosSummary() {
2559                 $msg = 'editpage-tos-summary';
2560                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
2561                 if ( !wfMessage( $msg )->isDisabled() ) {
2562                         global $wgOut;
2563                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
2564                         $wgOut->addWikiMsg( $msg );
2565                         $wgOut->addHTML( '</div>' );
2566                 }
2567         }
2568
2569         protected function showEditTools() {
2570                 global $wgOut;
2571                 $wgOut->addHTML( '<div class="mw-editTools">' .
2572                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
2573                         '</div>' );
2574         }
2575
2576         protected function getCopywarn() {
2577                 global $wgRightsText;
2578                 if ( $wgRightsText ) {
2579                         $copywarnMsg = array( 'copyrightwarning',
2580                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
2581                                 $wgRightsText );
2582                 } else {
2583                         $copywarnMsg = array( 'copyrightwarning2',
2584                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
2585                 }
2586                 // Allow for site and per-namespace customization of contribution/copyright notice.
2587                 wfRunHooks( 'EditPageCopyrightWarning', array( $this->mTitle, &$copywarnMsg ) );
2588
2589                 return "<div id=\"editpage-copywarn\">\n" .
2590                         call_user_func_array( "wfMsgNoTrans", $copywarnMsg ) . "\n</div>";
2591         }
2592
2593         protected function showStandardInputs( &$tabindex = 2 ) {
2594                 global $wgOut;
2595                 $wgOut->addHTML( "<div class='editOptions'>\n" );
2596
2597                 if ( $this->section != 'new' ) {
2598                         $this->showSummaryInput( false, $this->summary );
2599                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
2600                 }
2601
2602                 $checkboxes = $this->getCheckboxes( $tabindex,
2603                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
2604                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
2605                 $wgOut->addHTML( "<div class='editButtons'>\n" );
2606                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
2607
2608                 $cancel = $this->getCancelLink();
2609                 if ( $cancel !== '' ) {
2610                         $cancel .= wfMsgExt( 'pipe-separator' , 'escapenoentities' );
2611                 }
2612                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ) );
2613                 $edithelp = '<a target="helpwindow" href="' . $edithelpurl . '">' .
2614                         htmlspecialchars( wfMsg( 'edithelp' ) ) . '</a> ' .
2615                         htmlspecialchars( wfMsg( 'newwindow' ) );
2616                 $wgOut->addHTML( "      <span class='editHelp'>{$cancel}{$edithelp}</span>\n" );
2617                 $wgOut->addHTML( "</div><!-- editButtons -->\n</div><!-- editOptions -->\n" );
2618         }
2619
2620         /**
2621          * Show an edit conflict. textbox1 is already shown in showEditForm().
2622          * If you want to use another entry point to this function, be careful.
2623          */
2624         protected function showConflict() {
2625                 global $wgOut;
2626
2627                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
2628                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2629
2630                         $content1 = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format ); #XXX: handle parse errors?
2631                         $content2 = ContentHandler::makeContent( $this->textbox2, $this->getTitle(), $this->content_model, $this->content_format ); #XXX: handle parse errors?
2632
2633                         $handler = ContentHandler::getForModelName( $this->content_model );
2634                         $de = $handler->createDifferenceEngine( $this->mArticle->getContext() );
2635                         $de->setContent( $content2, $content1 );
2636                         $de->showDiff( wfMsgExt( 'yourtext', 'parseinline' ), wfMsg( 'storedversion' ) );
2637
2638                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2639                         $this->showTextbox2();
2640                 }
2641         }
2642
2643         /**
2644          * @return string
2645          */
2646         public function getCancelLink() {
2647                 $cancelParams = array();
2648                 if ( !$this->isConflict && $this->oldid > 0 ) {
2649                         $cancelParams['oldid'] = $this->oldid;
2650                 }
2651
2652                 return Linker::linkKnown(
2653                         $this->getContextTitle(),
2654                         wfMsgExt( 'cancel', array( 'parseinline' ) ),
2655                         array( 'id' => 'mw-editform-cancel' ),
2656                         $cancelParams
2657                 );
2658         }
2659
2660         /**
2661          * Returns the URL to use in the form's action attribute.
2662          * This is used by EditPage subclasses when simply customizing the action
2663          * variable in the constructor is not enough. This can be used when the
2664          * EditPage lives inside of a Special page rather than a custom page action.
2665          *
2666          * @param $title Title object for which is being edited (where we go to for &action= links)
2667          * @return string
2668          */
2669         protected function getActionURL( Title $title ) {
2670                 return $title->getLocalURL( array( 'action' => $this->action ) );
2671         }
2672
2673         /**
2674          * Check if a page was deleted while the user was editing it, before submit.
2675          * Note that we rely on the logging table, which hasn't been always there,
2676          * but that doesn't matter, because this only applies to brand new
2677          * deletes.
2678          */
2679         protected function wasDeletedSinceLastEdit() {
2680                 if ( $this->deletedSinceEdit !== null ) {
2681                         return $this->deletedSinceEdit;
2682                 }
2683
2684                 $this->deletedSinceEdit = false;
2685
2686                 if ( $this->mTitle->isDeletedQuick() ) {
2687                         $this->lastDelete = $this->getLastDelete();
2688                         if ( $this->lastDelete ) {
2689                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
2690                                 if ( $deleteTime > $this->starttime ) {
2691                                         $this->deletedSinceEdit = true;
2692                                 }
2693                         }
2694                 }
2695
2696                 return $this->deletedSinceEdit;
2697         }
2698
2699         protected function getLastDelete() {
2700                 $dbr = wfGetDB( DB_SLAVE );
2701                 $data = $dbr->selectRow(
2702                         array( 'logging', 'user' ),
2703                         array( 'log_type',
2704                                    'log_action',
2705                                    'log_timestamp',
2706                                    'log_user',
2707                                    'log_namespace',
2708                                    'log_title',
2709                                    'log_comment',
2710                                    'log_params',
2711                                    'log_deleted',
2712                                    'user_name' ),
2713                         array( 'log_namespace' => $this->mTitle->getNamespace(),
2714                                    'log_title' => $this->mTitle->getDBkey(),
2715                                    'log_type' => 'delete',
2716                                    'log_action' => 'delete',
2717                                    'user_id=log_user' ),
2718                         __METHOD__,
2719                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
2720                 );
2721                 // Quick paranoid permission checks...
2722                 if ( is_object( $data ) ) {
2723                         if ( $data->log_deleted & LogPage::DELETED_USER )
2724                                 $data->user_name = wfMsgHtml( 'rev-deleted-user' );
2725                         if ( $data->log_deleted & LogPage::DELETED_COMMENT )
2726                                 $data->log_comment = wfMsgHtml( 'rev-deleted-comment' );
2727                 }
2728                 return $data;
2729         }
2730
2731         /**
2732          * Get the rendered text for previewing.
2733          * @return string
2734          */
2735         function getPreviewText() {
2736                 global $wgOut, $wgUser, $wgParser, $wgRawHtml, $wgLang;
2737
2738                 wfProfileIn( __METHOD__ );
2739
2740                 if ( $wgRawHtml && !$this->mTokenOk ) {
2741                         // Could be an offsite preview attempt. This is very unsafe if
2742                         // HTML is enabled, as it could be an attack.
2743                         $parsedNote = '';
2744                         if ( $this->textbox1 !== '' ) {
2745                                 // Do not put big scary notice, if previewing the empty
2746                                 // string, which happens when you initially edit
2747                                 // a category page, due to automatic preview-on-open.
2748                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
2749                                         wfMsg( 'session_fail_preview_html' ) . "</div>", true, /* interface */true );
2750                         }
2751                         wfProfileOut( __METHOD__ );
2752                         return $parsedNote;
2753                 }
2754
2755                 $note = '';
2756
2757                 try {
2758                         $content = ContentHandler::makeContent( $this->textbox1, $this->getTitle(), $this->content_model, $this->content_format );
2759
2760                         if ( $this->mTriedSave && !$this->mTokenOk ) {
2761                                 if ( $this->mTokenOkExceptSuffix ) {
2762                                         $note = wfMsg( 'token_suffix_mismatch' );
2763                                 } else {
2764                                         $note = wfMsg( 'session_fail_preview' );
2765                                 }
2766                         } elseif ( $this->incompleteForm ) {
2767                                 $note = wfMsg( 'edit_form_incomplete' );
2768                         } else {
2769                                 $note = wfMsg( 'previewnote' ) .
2770                                         ' [[#' . self::EDITFORM_ID . '|' . $wgLang->getArrow() . ' ' . wfMsg( 'continue-editing' ) . ']]';
2771                         }
2772
2773                         $parserOptions = ParserOptions::newFromUser( $wgUser );
2774                         $parserOptions->setEditSection( false );
2775                         $parserOptions->setTidy( true );
2776                         $parserOptions->setIsPreview( true );
2777                         $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
2778
2779                         if ( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
2780                                 # don't parse non-wikitext pages, show message about preview
2781                                 if( $this->mTitle->isCssJsSubpage() ) {
2782                                         $level = 'user';
2783                                 } elseif( $this->mTitle->isCssOrJsPage() ) {
2784                                         $level = 'site';
2785                                 } else {
2786                                         $level = false;
2787                                 }
2788
2789                                 if ( $content->getModelName() == CONTENT_MODEL_CSS ) {
2790                                         $format = 'css';
2791                                 } elseif ( $content->getModelName() == CONTENT_MODEL_JAVASCRIPT ) {
2792                                         $format = 'js';
2793                                 } else {
2794                                         $format = false;
2795                                 }
2796
2797                                 # Used messages to make sure grep find them:
2798                                 # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
2799                                 if( $level && $format ) {
2800                                         $note = "<div id='mw-{$level}{$format}preview'>" . wfMsg( "{$level}{$format}preview" ) . "</div>";
2801                                 } else {
2802                                         $note = wfMsg( 'previewnote' );
2803                                 }
2804                         } else {
2805                                 $note = wfMsg( 'previewnote' );
2806                         }
2807
2808                         $rt = $content->getRedirectChain();
2809
2810                         if ( $rt ) {
2811                                 $previewHTML = $this->mArticle->viewRedirect( $rt, false );
2812                         } else {
2813
2814                                 # If we're adding a comment, we need to show the
2815                                 # summary as the headline
2816                                 if ( $this->section == "new" && $this->summary != "" ) {
2817                                         $content = $content->addSectionHeader( $this->summary );
2818                                 }
2819
2820                                 $toparse_orig = $content->serialize( $this->content_format );
2821                                 $toparse = $toparse_orig;
2822                                 wfRunHooks( 'EditPageGetPreviewText', array( $this, &$toparse ) );
2823
2824                                 if ( $toparse !== $toparse_orig ) {
2825                                         #hook changed the text, create new Content object
2826                                         $content = ContentHandler::makeContent( $toparse, $this->getTitle(), $this->content_model, $this->content_format );
2827                                 }
2828
2829                                 wfRunHooks( 'EditPageGetPreviewContent', array( $this, &$content ) ); # FIXME: document new hook
2830
2831                                 $parserOptions->enableLimitReport();
2832
2833                                 #XXX: For CSS/JS pages, we should have called the ShowRawCssJs hook here. But it's now deprecated, so never mind
2834                                 $content = $content->preSaveTransform( $this->mTitle, $wgUser, $parserOptions );
2835
2836                                 // TODO: might be a saner way to get a meaningfull context here?
2837                                 $parserOutput = $content->getParserOutput( $this->getArticle()->getContext(), null, $parserOptions );
2838
2839                                 $previewHTML = $parserOutput->getText();
2840                                 $this->mParserOutput = $parserOutput;
2841                                 $wgOut->addParserOutputNoText( $parserOutput );
2842
2843                                 if ( count( $parserOutput->getWarnings() ) ) {
2844                                         $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
2845                                 }
2846                         }
2847                 } catch (MWContentSerializationException $ex) {
2848                         $note .= "\n\n" . wfMsg('content-failed-to-parse', $this->content_model, $this->content_format, $ex->getMessage() );
2849                         $previewHTML = '';
2850                 }
2851
2852                 if ( $this->isConflict ) {
2853                         $conflict = '<h2 id="mw-previewconflict">' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
2854                 } else {
2855                         $conflict = '<hr />';
2856                 }
2857
2858                 $previewhead = "<div class='previewnote'>\n" .
2859                         '<h2 id="mw-previewheader">' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>" .
2860                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
2861
2862                 $pageLang = $this->mTitle->getPageLanguage();
2863                 $attribs = array( 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
2864                         'class' => 'mw-content-' . $pageLang->getDir() );
2865                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
2866
2867                 wfProfileOut( __METHOD__ );
2868                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
2869         }
2870
2871         /**
2872          * @return Array
2873          */
2874         function getTemplates() {
2875                 if ( $this->preview || $this->section != '' ) {
2876                         $templates = array();
2877                         if ( !isset( $this->mParserOutput ) ) {
2878                                 return $templates;
2879                         }
2880                         foreach ( $this->mParserOutput->getTemplates() as $ns => $template ) {
2881                                 foreach ( array_keys( $template ) as $dbk ) {
2882                                         $templates[] = Title::makeTitle( $ns, $dbk );
2883                                 }
2884                         }
2885                         return $templates;
2886                 } else {
2887                         return $this->mTitle->getTemplateLinksFrom();
2888                 }
2889         }
2890
2891         /**
2892          * Shows a bulletin board style toolbar for common editing functions.
2893          * It can be disabled in the user preferences.
2894          * The necessary JavaScript code can be found in skins/common/edit.js.
2895          *
2896          * @return string
2897          */
2898         static function getEditToolbar() {
2899                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
2900                 global $wgUseTeX, $wgEnableUploads, $wgForeignFileRepos;
2901
2902                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
2903
2904                 /**
2905                  * $toolarray is an array of arrays each of which includes the
2906                  * filename of the button image (without path), the opening
2907                  * tag, the closing tag, optionally a sample text that is
2908                  * inserted between the two when no selection is highlighted
2909                  * and.  The tip text is shown when the user moves the mouse
2910                  * over the button.
2911                  *
2912                  * Also here: accesskeys (key), which are not used yet until
2913                  * someone can figure out a way to make them work in
2914                  * IE. However, we should make sure these keys are not defined
2915                  * on the edit page.
2916                  */
2917                 $toolarray = array(
2918                         array(
2919                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
2920                                 'id'     => 'mw-editbutton-bold',
2921                                 'open'   => '\'\'\'',
2922                                 'close'  => '\'\'\'',
2923                                 'sample' => wfMsg( 'bold_sample' ),
2924                                 'tip'    => wfMsg( 'bold_tip' ),
2925                                 'key'    => 'B'
2926                         ),
2927                         array(
2928                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
2929                                 'id'     => 'mw-editbutton-italic',
2930                                 'open'   => '\'\'',
2931                                 'close'  => '\'\'',
2932                                 'sample' => wfMsg( 'italic_sample' ),
2933                                 'tip'    => wfMsg( 'italic_tip' ),
2934                                 'key'    => 'I'
2935                         ),
2936                         array(
2937                                 'image'  => $wgLang->getImageFile( 'button-link' ),
2938                                 'id'     => 'mw-editbutton-link',
2939                                 'open'   => '[[',
2940                                 'close'  => ']]',
2941                                 'sample' => wfMsg( 'link_sample' ),
2942                                 'tip'    => wfMsg( 'link_tip' ),
2943                                 'key'    => 'L'
2944                         ),
2945                         array(
2946                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
2947                                 'id'     => 'mw-editbutton-extlink',
2948                                 'open'   => '[',
2949                                 'close'  => ']',
2950                                 'sample' => wfMsg( 'extlink_sample' ),
2951                                 'tip'    => wfMsg( 'extlink_tip' ),
2952                                 'key'    => 'X'
2953                         ),
2954                         array(
2955                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
2956                                 'id'     => 'mw-editbutton-headline',
2957                                 'open'   => "\n== ",
2958                                 'close'  => " ==\n",
2959                                 'sample' => wfMsg( 'headline_sample' ),
2960                                 'tip'    => wfMsg( 'headline_tip' ),
2961                                 'key'    => 'H'
2962                         ),
2963                         $imagesAvailable ? array(
2964                                 'image'  => $wgLang->getImageFile( 'button-image' ),
2965                                 'id'     => 'mw-editbutton-image',
2966                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
2967                                 'close'  => ']]',
2968                                 'sample' => wfMsg( 'image_sample' ),
2969                                 'tip'    => wfMsg( 'image_tip' ),
2970                                 'key'    => 'D',
2971                         ) : false,
2972                         $imagesAvailable ? array(
2973                                 'image'  => $wgLang->getImageFile( 'button-media' ),
2974                                 'id'     => 'mw-editbutton-media',
2975                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
2976                                 'close'  => ']]',
2977                                 'sample' => wfMsg( 'media_sample' ),
2978                                 'tip'    => wfMsg( 'media_tip' ),
2979                                 'key'    => 'M'
2980                         ) : false,
2981                         $wgUseTeX ? array(
2982                                 'image'  => $wgLang->getImageFile( 'button-math' ),
2983                                 'id'     => 'mw-editbutton-math',
2984                                 'open'   => "<math>",
2985                                 'close'  => "</math>",
2986                                 'sample' => wfMsg( 'math_sample' ),
2987                                 'tip'    => wfMsg( 'math_tip' ),
2988                                 'key'    => 'C'
2989                         ) : false,
2990                         array(
2991                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
2992                                 'id'     => 'mw-editbutton-nowiki',
2993                                 'open'   => "<nowiki>",
2994                                 'close'  => "</nowiki>",
2995                                 'sample' => wfMsg( 'nowiki_sample' ),
2996                                 'tip'    => wfMsg( 'nowiki_tip' ),
2997                                 'key'    => 'N'
2998                         ),
2999                         array(
3000                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
3001                                 'id'     => 'mw-editbutton-signature',
3002                                 'open'   => '--~~~~',
3003                                 'close'  => '',
3004                                 'sample' => '',
3005                                 'tip'    => wfMsg( 'sig_tip' ),
3006                                 'key'    => 'Y'
3007                         ),
3008                         array(
3009                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
3010                                 'id'     => 'mw-editbutton-hr',
3011                                 'open'   => "\n----\n",
3012                                 'close'  => '',
3013                                 'sample' => '',
3014                                 'tip'    => wfMsg( 'hr_tip' ),
3015                                 'key'    => 'R'
3016                         )
3017                 );
3018
3019                 $script = 'mw.loader.using("mediawiki.action.edit", function() {';
3020                 foreach ( $toolarray as $tool ) {
3021                         if ( !$tool ) {
3022                                 continue;
3023                         }
3024
3025                         $params = array(
3026                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
3027                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
3028                                 // Older browsers show a "speedtip" type message only for ALT.
3029                                 // Ideally these should be different, realistically they
3030                                 // probably don't need to be.
3031                                 $tip = $tool['tip'],
3032                                 $open = $tool['open'],
3033                                 $close = $tool['close'],
3034                                 $sample = $tool['sample'],
3035                                 $cssId = $tool['id'],
3036                         );
3037
3038                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
3039                 }
3040
3041                 // This used to be called on DOMReady from mediawiki.action.edit, which
3042                 // ended up causing race conditions with the setup code above.
3043                 $script .= "\n" .
3044                         "// Create button bar\n" .
3045                         "$(function() { mw.toolbar.init(); } );\n";
3046
3047                 $script .= '});';
3048                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
3049
3050                 $toolbar = '<div id="toolbar"></div>';
3051
3052                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
3053
3054                 return $toolbar;
3055         }
3056
3057         /**
3058          * Returns an array of html code of the following checkboxes:
3059          * minor and watch
3060          *
3061          * @param $tabindex int Current tabindex
3062          * @param $checked Array of checkbox => bool, where bool indicates the checked
3063          *                 status of the checkbox
3064          *
3065          * @return array
3066          */
3067         public function getCheckboxes( &$tabindex, $checked ) {
3068                 global $wgUser;
3069
3070                 $checkboxes = array();
3071
3072                 // don't show the minor edit checkbox if it's a new page or section
3073                 if ( !$this->isNew ) {
3074                         $checkboxes['minor'] = '';
3075                         $minorLabel = wfMsgExt( 'minoredit', array( 'parseinline' ) );
3076                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
3077                                 $attribs = array(
3078                                         'tabindex'  => ++$tabindex,
3079                                         'accesskey' => wfMsg( 'accesskey-minoredit' ),
3080                                         'id'        => 'wpMinoredit',
3081                                 );
3082                                 $checkboxes['minor'] =
3083                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
3084                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
3085                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
3086                                         ">{$minorLabel}</label>";
3087                         }
3088                 }
3089
3090                 $watchLabel = wfMsgExt( 'watchthis', array( 'parseinline' ) );
3091                 $checkboxes['watch'] = '';
3092                 if ( $wgUser->isLoggedIn() ) {
3093                         $attribs = array(
3094                                 'tabindex'  => ++$tabindex,
3095                                 'accesskey' => wfMsg( 'accesskey-watch' ),
3096                                 'id'        => 'wpWatchthis',
3097                         );
3098                         $checkboxes['watch'] =
3099                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
3100                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
3101                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
3102                                 ">{$watchLabel}</label>";
3103                 }
3104                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
3105                 return $checkboxes;
3106         }
3107
3108         /**
3109          * Returns an array of html code of the following buttons:
3110          * save, diff, preview and live
3111          *
3112          * @param $tabindex int Current tabindex
3113          *
3114          * @return array
3115          */
3116         public function getEditButtons( &$tabindex ) {
3117                 $buttons = array();
3118
3119                 $temp = array(
3120                         'id'        => 'wpSave',
3121                         'name'      => 'wpSave',
3122                         'type'      => 'submit',
3123                         'tabindex'  => ++$tabindex,
3124                         'value'     => wfMsg( 'savearticle' ),
3125                         'accesskey' => wfMsg( 'accesskey-save' ),
3126                         'title'     => wfMsg( 'tooltip-save' ) . ' [' . wfMsg( 'accesskey-save' ) . ']',
3127                 );
3128                 $buttons['save'] = Xml::element( 'input', $temp, '' );
3129
3130                 ++$tabindex; // use the same for preview and live preview
3131                 $temp = array(
3132                         'id'        => 'wpPreview',
3133                         'name'      => 'wpPreview',
3134                         'type'      => 'submit',
3135                         'tabindex'  => $tabindex,
3136                         'value'     => wfMsg( 'showpreview' ),
3137                         'accesskey' => wfMsg( 'accesskey-preview' ),
3138                         'title'     => wfMsg( 'tooltip-preview' ) . ' [' . wfMsg( 'accesskey-preview' ) . ']',
3139                 );
3140                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
3141                 $buttons['live'] = '';
3142
3143                 $temp = array(
3144                         'id'        => 'wpDiff',
3145                         'name'      => 'wpDiff',
3146                         'type'      => 'submit',
3147                         'tabindex'  => ++$tabindex,
3148                         'value'     => wfMsg( 'showdiff' ),
3149                         'accesskey' => wfMsg( 'accesskey-diff' ),
3150                         'title'     => wfMsg( 'tooltip-diff' ) . ' [' . wfMsg( 'accesskey-diff' ) . ']',
3151                 );
3152                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
3153
3154                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
3155                 return $buttons;
3156         }
3157
3158         /**
3159          * Output preview text only. This can be sucked into the edit page
3160          * via JavaScript, and saves the server time rendering the skin as
3161          * well as theoretically being more robust on the client (doesn't
3162          * disturb the edit box's undo history, won't eat your text on
3163          * failure, etc).
3164          *
3165          * @todo This doesn't include category or interlanguage links.
3166          *       Would need to enhance it a bit, <s>maybe wrap them in XML
3167          *       or something...</s> that might also require more skin
3168          *       initialization, so check whether that's a problem.
3169          */
3170         function livePreview() {
3171                 global $wgOut;
3172                 $wgOut->disable();
3173                 header( 'Content-type: text/xml; charset=utf-8' );
3174                 header( 'Cache-control: no-cache' );
3175
3176                 $previewText = $this->getPreviewText();
3177                 #$categories = $skin->getCategoryLinks();
3178
3179                 $s =
3180                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
3181                 Xml::tags( 'livepreview', null,
3182                         Xml::element( 'preview', null, $previewText )
3183                         #.      Xml::element( 'category', null, $categories )
3184                 );
3185                 echo $s;
3186         }
3187
3188         /**
3189          * Call the stock "user is blocked" page
3190          *
3191          * @deprecated in 1.19; throw an exception directly instead
3192          */
3193         function blockedPage() {
3194                 wfDeprecated( __METHOD__, '1.19' );
3195                 global $wgUser;
3196
3197                 throw new UserBlockedError( $wgUser->getBlock() );
3198         }
3199
3200         /**
3201          * Produce the stock "please login to edit pages" page
3202          *
3203          * @deprecated in 1.19; throw an exception directly instead
3204          */
3205         function userNotLoggedInPage() {
3206                 wfDeprecated( __METHOD__, '1.19' );
3207                 throw new PermissionsError( 'edit' );
3208         }
3209
3210         /**
3211          * Show an error page saying to the user that he has insufficient permissions
3212          * to create a new page
3213          *
3214          * @deprecated in 1.19; throw an exception directly instead
3215          */
3216         function noCreatePermission() {
3217                 wfDeprecated( __METHOD__, '1.19' );
3218                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
3219                 throw new PermissionsError( $permission );
3220         }
3221
3222         /**
3223          * Creates a basic error page which informs the user that
3224          * they have attempted to edit a nonexistent section.
3225          */
3226         function noSuchSectionPage() {
3227                 global $wgOut;
3228
3229                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
3230
3231                 $res = wfMsgExt( 'nosuchsectiontext', 'parse', $this->section );
3232                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
3233                 $wgOut->addHTML( $res );
3234
3235                 $wgOut->returnToMain( false, $this->mTitle );
3236         }
3237
3238         /**
3239          * Produce the stock "your edit contains spam" page
3240          *
3241          * @param $match string Text which triggered one or more filters
3242          * @deprecated since 1.17 Use method spamPageWithContent() instead
3243          */
3244         static function spamPage( $match = false ) {
3245                 wfDeprecated( __METHOD__, '1.17' );
3246
3247                 global $wgOut, $wgTitle;
3248
3249                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3250
3251                 $wgOut->addHTML( '<div id="spamprotected">' );
3252                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3253                 if ( $match ) {
3254                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3255                 }
3256                 $wgOut->addHTML( '</div>' );
3257
3258                 $wgOut->returnToMain( false, $wgTitle );
3259         }
3260
3261         /**
3262          * Show "your edit contains spam" page with your diff and text
3263          *
3264          * @param $match string|Array|bool Text (or array of texts) which triggered one or more filters
3265          */
3266         public function spamPageWithContent( $match = false ) {
3267                 global $wgOut, $wgLang;
3268                 $this->textbox2 = $this->textbox1;
3269
3270                 if( is_array( $match ) ){
3271                         $match = $wgLang->listToText( $match );
3272                 }
3273                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
3274
3275                 $wgOut->addHTML( '<div id="spamprotected">' );
3276                 $wgOut->addWikiMsg( 'spamprotectiontext' );
3277                 if ( $match ) {
3278                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
3279                 }
3280                 $wgOut->addHTML( '</div>' );
3281
3282                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
3283                 $this->showDiff();
3284
3285                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
3286                 $this->showTextbox2();
3287
3288                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
3289         }
3290
3291         /**
3292          * Format an anchor fragment as it would appear for a given section name
3293          * @param $text String
3294          * @return String
3295          * @private
3296          */
3297         function sectionAnchor( $text ) {
3298                 global $wgParser;
3299                 return $wgParser->guessSectionNameFromWikiText( $text );
3300         }
3301
3302         /**
3303          * Check if the browser is on a blacklist of user-agents known to
3304          * mangle UTF-8 data on form submission. Returns true if Unicode
3305          * should make it through, false if it's known to be a problem.
3306          * @return bool
3307          * @private
3308          */
3309         function checkUnicodeCompliantBrowser() {
3310                 global $wgBrowserBlackList;
3311                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
3312                         // No User-Agent header sent? Trust it by default...
3313                         return true;
3314                 }
3315                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
3316                 foreach ( $wgBrowserBlackList as $browser ) {
3317                         if ( preg_match( $browser, $currentbrowser ) ) {
3318                                 return false;
3319                         }
3320                 }
3321                 return true;
3322         }
3323
3324         /**
3325          * Filter an input field through a Unicode de-armoring process if it
3326          * came from an old browser with known broken Unicode editing issues.
3327          *
3328          * @param $request WebRequest
3329          * @param $field String
3330          * @return String
3331          * @private
3332          */
3333         function safeUnicodeInput( $request, $field ) {
3334                 $text = rtrim( $request->getText( $field ) );
3335                 return $request->getBool( 'safemode' )
3336                         ? $this->unmakesafe( $text )
3337                         : $text;
3338         }
3339
3340         /**
3341          * @param $request WebRequest
3342          * @param $text string
3343          * @return string
3344          */
3345         function safeUnicodeText( $request, $text ) {
3346                 $text = rtrim( $text );
3347                 return $request->getBool( 'safemode' )
3348                         ? $this->unmakesafe( $text )
3349                         : $text;
3350         }
3351
3352         /**
3353          * Filter an output field through a Unicode armoring process if it is
3354          * going to an old browser with known broken Unicode editing issues.
3355          *
3356          * @param $text String
3357          * @return String
3358          * @private
3359          */
3360         function safeUnicodeOutput( $text ) {
3361                 global $wgContLang;
3362                 $codedText = $wgContLang->recodeForEdit( $text );
3363                 return $this->checkUnicodeCompliantBrowser()
3364                         ? $codedText
3365                         : $this->makesafe( $codedText );
3366         }
3367
3368         /**
3369          * A number of web browsers are known to corrupt non-ASCII characters
3370          * in a UTF-8 text editing environment. To protect against this,
3371          * detected browsers will be served an armored version of the text,
3372          * with non-ASCII chars converted to numeric HTML character references.
3373          *
3374          * Preexisting such character references will have a 0 added to them
3375          * to ensure that round-trips do not alter the original data.
3376          *
3377          * @param $invalue String
3378          * @return String
3379          * @private
3380          */
3381         function makesafe( $invalue ) {
3382                 // Armor existing references for reversability.
3383                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
3384
3385                 $bytesleft = 0;
3386                 $result = "";
3387                 $working = 0;
3388                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3389                         $bytevalue = ord( $invalue[$i] );
3390                         if ( $bytevalue <= 0x7F ) { // 0xxx xxxx
3391                                 $result .= chr( $bytevalue );
3392                                 $bytesleft = 0;
3393                         } elseif ( $bytevalue <= 0xBF ) { // 10xx xxxx
3394                                 $working = $working << 6;
3395                                 $working += ( $bytevalue & 0x3F );
3396                                 $bytesleft--;
3397                                 if ( $bytesleft <= 0 ) {
3398                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
3399                                 }
3400                         } elseif ( $bytevalue <= 0xDF ) { // 110x xxxx
3401                                 $working = $bytevalue & 0x1F;
3402                                 $bytesleft = 1;
3403                         } elseif ( $bytevalue <= 0xEF ) { // 1110 xxxx
3404                                 $working = $bytevalue & 0x0F;
3405                                 $bytesleft = 2;
3406                         } else { // 1111 0xxx
3407                                 $working = $bytevalue & 0x07;
3408                                 $bytesleft = 3;
3409                         }
3410                 }
3411                 return $result;
3412         }
3413
3414         /**
3415          * Reverse the previously applied transliteration of non-ASCII characters
3416          * back to UTF-8. Used to protect data from corruption by broken web browsers
3417          * as listed in $wgBrowserBlackList.
3418          *
3419          * @param $invalue String
3420          * @return String
3421          * @private
3422          */
3423         function unmakesafe( $invalue ) {
3424                 $result = "";
3425                 for ( $i = 0; $i < strlen( $invalue ); $i++ ) {
3426                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i + 3] != '0' ) ) {
3427                                 $i += 3;
3428                                 $hexstring = "";
3429                                 do {
3430                                         $hexstring .= $invalue[$i];
3431                                         $i++;
3432                                 } while ( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
3433
3434                                 // Do some sanity checks. These aren't needed for reversability,
3435                                 // but should help keep the breakage down if the editor
3436                                 // breaks one of the entities whilst editing.
3437                                 if ( ( substr( $invalue, $i, 1 ) == ";" ) and ( strlen( $hexstring ) <= 6 ) ) {
3438                                         $codepoint = hexdec( $hexstring );
3439                                         $result .= codepointToUtf8( $codepoint );
3440                                 } else {
3441                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
3442                                 }
3443                         } else {
3444                                 $result .= substr( $invalue, $i, 1 );
3445                         }
3446                 }
3447                 // reverse the transform that we made for reversability reasons.
3448                 return strtr( $result, array( "&#x0" => "&#x" ) );
3449         }
3450 }