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         const AS_SUCCESS_UPDATE            = 200;
  24         const AS_SUCCESS_NEW_ARTICLE       = 201;
  25         const AS_HOOK_ERROR                = 210;
  26         const AS_FILTERING                 = 211;
  27         const AS_HOOK_ERROR_EXPECTED       = 212;
  28         const AS_BLOCKED_PAGE_FOR_USER     = 215;
  29         const AS_CONTENT_TOO_BIG           = 216;
  30         const AS_USER_CANNOT_EDIT          = 217;
  31         const AS_READ_ONLY_PAGE_ANON       = 218;
  32         const AS_READ_ONLY_PAGE_LOGGED     = 219;
  33         const AS_READ_ONLY_PAGE            = 220;
  34         const AS_RATE_LIMITED              = 221;
  35         const AS_ARTICLE_WAS_DELETED       = 222;
  36         const AS_NO_CREATE_PERMISSION      = 223;
  37         const AS_BLANK_ARTICLE             = 224;
  38         const AS_CONFLICT_DETECTED         = 225;
  39         const AS_SUMMARY_NEEDED            = 226;
  40         const AS_TEXTBOX_EMPTY             = 228;
  41         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
  42         const AS_OK                        = 230;
  43         const AS_END                       = 231;
  44         const AS_SPAM_ERROR                = 232;
  45         const AS_IMAGE_REDIRECT_ANON       = 233;
  46         const AS_IMAGE_REDIRECT_LOGGED     = 234;
  47
  48         /**
  49          * @var Article
  50          */
  51         var $mArticle;
  52
  53         /**
  54          * @var Title
  55          */
  56         var $mTitle;
  57         private $mContextTitle = null;
  58         var $action = 'submit';
  59         var $isConflict = false;
  60         var $isCssJsSubpage = false;
  61         var $isCssSubpage = false;
  62         var $isJsSubpage = false;
  63         var $isWrongCaseCssJsPage = false;
  64         var $isNew = false; // new page or new section
  65         var $deletedSinceEdit;
  66         var $formtype;
  67         var $firsttime;
  68         var $lastDelete;
  69         var $mTokenOk = false;
  70         var $mTokenOkExceptSuffix = false;
  71         var $mTriedSave = false;
  72         var $incompleteForm = false;
  73         var $tooBig = false;
  74         var $kblength = false;
  75         var $missingComment = false;
  76         var $missingSummary = false;
  77         var $allowBlankSummary = false;
  78         var $autoSumm = '';
  79         var $hookError = '';
  80         #var $mPreviewTemplates;
  81
  82         /**
  83          * @var ParserOutput
  84          */
  85         var $mParserOutput;
  86
  87         var $mBaseRevision = false;
  88         var $mShowSummaryField = true;
  89
  90         # Form values
  91         var $save = false, $preview = false, $diff = false;
  92         var $minoredit = false, $watchthis = false, $recreate = false;
  93         var $textbox1 = '', $textbox2 = '', $summary = '', $nosummary = false;
  94         var $edittime = '', $section = '', $starttime = '';
  95         var $oldid = 0, $editintro = '', $scrolltop = null, $bot = true;
  96
  97         # Placeholders for text injection by hooks (must be HTML)
  98         # extensions should take care to _append_ to the present value
  99         public $editFormPageTop = ''; // Before even the preview
 100         public $editFormTextTop = '';
 101         public $editFormTextBeforeContent = '';
 102         public $editFormTextAfterWarn = '';
 103         public $editFormTextAfterTools = '';
 104         public $editFormTextBottom = '';
 105         public $editFormTextAfterContent = '';
 106         public $previewTextAfterContent = '';
 107         public $mPreloadText = '';
 108
 109         /* $didSave should be set to true whenever an article was succesfully altered. */
 110         public $didSave = false;
 111         public $undidRev = 0;
 112
 113         public $suppressIntro = false;
 114
 115         /**
 116          * @todo document
 117          * @param $article Article
 118          */
 119         public function __construct( $article ) {
 120                 $this->mArticle = $article;
 121                 $this->mTitle = $article->getTitle();
 122         }
 123
 124         /**
 125          * @return Article
 126          */
 127         public function getArticle() {
 128                 return $this->mArticle;
 129         }
 130
 131         /**
 132          * @since 1.19
 133          * @return Title
 134          */
 135         public function getTitle() {
 136                 return $this->mTitle;
 137         }
 138
 139         /**
 140          * Set the context Title object
 141          *
 142          * @param $title Title object or null
 143          */
 144         public function setContextTitle( $title ) {
 145                 $this->mContextTitle = $title;
 146         }
 147
 148         /**
 149          * Get the context title object.
 150          * If not set, $wgTitle will be returned. This behavior might changed in
 151          * the future to return $this->mTitle instead.
 152          *
 153          * @return Title object
 154          */
 155         public function getContextTitle() {
 156                 if ( is_null( $this->mContextTitle ) ) {
 157                         global $wgTitle;
 158                         return $wgTitle;
 159                 } else {
 160                         return $this->mContextTitle;
 161                 }
 162         }
 163
 164         function submit() {
 165                 $this->edit();
 166         }
 167
 168         /**
 169          * This is the function that gets called for "action=edit". It
 170          * sets up various member variables, then passes execution to
 171          * another function, usually showEditForm()
 172          *
 173          * The edit form is self-submitting, so that when things like
 174          * preview and edit conflicts occur, we get the same form back
 175          * with the extra stuff added.  Only when the final submission
 176          * is made and all is well do we actually save and redirect to
 177          * the newly-edited page.
 178          */
 179         function edit() {
 180                 global $wgOut, $wgRequest, $wgUser;
 181                 // Allow extensions to modify/prevent this form or submission
 182                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 183                         return;
 184                 }
 185
 186                 wfProfileIn( __METHOD__ );
 187                 wfDebug( __METHOD__.": enter\n" );
 188
 189                 // If they used redlink=1 and the page exists, redirect to the main article
 190                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 191                         $wgOut->redirect( $this->mTitle->getFullURL() );
 192                         wfProfileOut( __METHOD__ );
 193                         return;
 194                 }
 195
 196                 $this->importFormData( $wgRequest );
 197                 $this->firsttime = false;
 198
 199                 if ( $this->live ) {
 200                         $this->livePreview();
 201                         wfProfileOut( __METHOD__ );
 202                         return;
 203                 }
 204
 205                 if ( wfReadOnly() && $this->save ) {
 206                         // Force preview
 207                         $this->save = false;
 208                         $this->preview = true;
 209                 }
 210
 211                 if ( $this->save ) {
 212                         $this->formtype = 'save';
 213                 } elseif ( $this->preview ) {
 214                         $this->formtype = 'preview';
 215                 } elseif ( $this->diff ) {
 216                         $this->formtype = 'diff';
 217                 } else { # First time through
 218                         $this->firsttime = true;
 219                         if ( $this->previewOnOpen() ) {
 220                                 $this->formtype = 'preview';
 221                         } else {
 222                                 $this->formtype = 'initial';
 223                         }
 224                 }
 225
 226                 $permErrors = $this->getEditPermissionErrors();
 227                 if ( $permErrors ) {
 228                         wfDebug( __METHOD__ . ": User can't edit\n" );
 229                         // Auto-block user's IP if the account was "hard" blocked
 230                         $wgUser->spreadAnyEditBlock();
 231
 232                         $this->displayPermissionsError( $permErrors );
 233
 234                         wfProfileOut( __METHOD__ );
 235                         return;
 236                 }
 237
 238                 $wgOut->addModules( array( 'mediawiki.action.edit' ) );
 239
 240                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
 241                         $wgOut->addModules( 'mediawiki.legacy.preview' );
 242                 }
 243                 // Bug #19334: textarea jumps when editing articles in IE8
 244                 $wgOut->addStyle( 'common/IE80Fixes.css', 'screen', 'IE 8' );
 245
 246                 wfProfileIn( __METHOD__."-business-end" );
 247
 248                 $this->isConflict = false;
 249                 // css / js subpages of user pages get a special treatment
 250                 $this->isCssJsSubpage       = $this->mTitle->isCssJsSubpage();
 251                 $this->isCssSubpage         = $this->mTitle->isCssSubpage();
 252                 $this->isJsSubpage          = $this->mTitle->isJsSubpage();
 253                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 254                 $this->isNew                = !$this->mTitle->exists() || $this->section == 'new';
 255
 256                 # Show applicable editing introductions
 257                 if ( $this->formtype == 'initial' || $this->firsttime )
 258                         $this->showIntro();
 259
 260                 if ( $this->mTitle->isTalkPage() ) {
 261                         $wgOut->addWikiMsg( 'talkpagetext' );
 262                 }
 263
 264                 # Optional notices on a per-namespace and per-page basis
 265                 $editnotice_ns   = 'editnotice-'.$this->mTitle->getNamespace();
 266                 $editnotice_ns_message = wfMessage( $editnotice_ns )->inContentLanguage();
 267                 if ( $editnotice_ns_message->exists() ) {
 268                         $wgOut->addWikiText( $editnotice_ns_message->plain() );
 269                 }
 270                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
 271                         $parts = explode( '/', $this->mTitle->getDBkey() );
 272                         $editnotice_base = $editnotice_ns;
 273                         while ( count( $parts ) > 0 ) {
 274                                 $editnotice_base .= '-'.array_shift( $parts );
 275                                 $editnotice_base_msg = wfMessage( $editnotice_base )->inContentLanguage();
 276                                 if ( $editnotice_base_msg->exists() ) {
 277                                         $wgOut->addWikiText( $editnotice_base_msg->plain()  );
 278                                 }
 279                         }
 280                 } else {
 281                         # Even if there are no subpages in namespace, we still don't want / in MW ns.
 282                         $editnoticeText = $editnotice_ns . '-' . str_replace( '/', '-', $this->mTitle->getDBkey() );
 283                         $editnoticeMsg = wfMessage( $editnoticeText )->inContentLanguage();
 284                         if ( $editnoticeMsg->exists() ) {
 285                                 $wgOut->addWikiText( $editnoticeMsg->plain() );
 286                         }
 287                 }
 288
 289                 # Attempt submission here.  This will check for edit conflicts,
 290                 # and redundantly check for locked database, blocked IPs, etc.
 291                 # that edit() already checked just in case someone tries to sneak
 292                 # in the back door with a hand-edited submission URL.
 293
 294                 if ( 'save' == $this->formtype ) {
 295                         if ( !$this->attemptSave() ) {
 296                                 wfProfileOut( __METHOD__."-business-end" );
 297                                 wfProfileOut( __METHOD__ );
 298                                 return;
 299                         }
 300                 }
 301
 302                 # First time through: get contents, set time for conflict
 303                 # checking, etc.
 304                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 305                         if ( $this->initialiseForm() === false ) {
 306                                 $this->noSuchSectionPage();
 307                                 wfProfileOut( __METHOD__."-business-end" );
 308                                 wfProfileOut( __METHOD__ );
 309                                 return;
 310                         }
 311                         if ( !$this->mTitle->getArticleId() )
 312                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 313                         else
 314                                 wfRunHooks( 'EditFormInitialText', array( $this ) );
 315                 }
 316
 317                 $this->showEditForm();
 318                 wfProfileOut( __METHOD__."-business-end" );
 319                 wfProfileOut( __METHOD__ );
 320         }
 321
 322         /**
 323          * @return array
 324          */
 325         protected function getEditPermissionErrors() {
 326                 global $wgUser;
 327                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 328                 # Can this title be created?
 329                 if ( !$this->mTitle->exists() ) {
 330                         $permErrors = array_merge( $permErrors,
 331                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 332                 }
 333                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 334                 $remove = array();
 335                 foreach( $permErrors as $error ) {
 336                         if ( ( $this->preview || $this->diff ) &&
 337                                 ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' ) )
 338                         {
 339                                 $remove[] = $error;
 340                         }
 341                 }
 342                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 343                 return $permErrors;
 344         }
 345
 346         /**
 347          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 348          * but with the following differences:
 349          * - If redlink=1, the user will be redirect to the page
 350          * - If there is content to display or the error occurs while either saving,
 351          *   previewing or showing the difference, it will be a
 352          *   "View source for ..." page displaying the source code after the error message.
 353          *
 354          * @since 1.19
 355          * @param $permErrors Array of permissions errors, as returned by
 356          *                    Title::getUserPermissionsErrors().
 357          */
 358         protected function displayPermissionsError( array $permErrors ) {
 359                 global $wgRequest, $wgOut;
 360
 361                 if ( $wgRequest->getBool( 'redlink' ) ) {
 362                         // The edit page was reached via a red link.
 363                         // Redirect to the article page and let them click the edit tab if
 364                         // they really want a permission error.
 365                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 366                         return;
 367                 }
 368
 369                 $content = $this->getContent();
 370
 371                 # Use the normal message if there's nothing to display
 372                 if ( $this->firsttime && $content === '' ) {
 373                         $action = $this->mTitle->exists() ? 'edit' :
 374                                 ( $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 375                         throw new PermissionsError( $action, $permErrors );
 376                 }
 377
 378                 $wgOut->setPageTitle( wfMessage( 'viewsource-title', $this->getContextTitle()->getPrefixedText() ) );
 379                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 380                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 381                 $wgOut->addHTML( "<hr />\n" );
 382
 383                 # If the user made changes, preserve them when showing the markup
 384                 # (This happens when a user is blocked during edit, for instance)
 385                 if ( !$this->firsttime ) {
 386                         $content = $this->textbox1;
 387                         $wgOut->addWikiMsg( 'viewyourtext' );
 388                 } else {
 389                         $wgOut->addWikiMsg( 'viewsourcetext' );
 390                 }
 391
 392                 $this->showTextbox( $content, 'wpTextbox1', array( 'readonly' ) );
 393
 394                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 395                         Linker::formatTemplates( $this->getTemplates() ) ) );
 396
 397                 if ( $this->mTitle->exists() ) {
 398                         $wgOut->returnToMain( null, $this->mTitle );
 399                 }
 400         }
 401
 402         /**
 403          * Show a read-only error
 404          * Parameters are the same as OutputPage:readOnlyPage()
 405          * Redirect to the article page if redlink=1
 406          * @deprecated in 1.19; use displayPermissionsError() instead
 407          */
 408         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 409                 global $wgRequest, $wgOut;
 410                 if ( $wgRequest->getBool( 'redlink' ) ) {
 411                         // The edit page was reached via a red link.
 412                         // Redirect to the article page and let them click the edit tab if
 413                         // they really want a permission error.
 414                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 415                 } else {
 416                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 417                 }
 418         }
 419
 420         /**
 421          * Should we show a preview when the edit form is first shown?
 422          *
 423          * @return bool
 424          */
 425         protected function previewOnOpen() {
 426                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 427                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 428                         // Explicit override from request
 429                         return true;
 430                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 431                         // Explicit override from request
 432                         return false;
 433                 } elseif ( $this->section == 'new' ) {
 434                         // Nothing *to* preview for new sections
 435                         return false;
 436                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 437                         // Standard preference behaviour
 438                         return true;
 439                 } elseif ( !$this->mTitle->exists() &&
 440                   isset($wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]) &&
 441                   $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 442                 {
 443                         // Categories are special
 444                         return true;
 445                 } else {
 446                         return false;
 447                 }
 448         }
 449
 450         /**
 451          * Checks whether the user entered a skin name in uppercase,
 452          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 453          *
 454          * @return bool
 455          */
 456         protected function isWrongCaseCssJsPage() {
 457                 if( $this->mTitle->isCssJsSubpage() ) {
 458                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 459                         $skins = array_merge(
 460                                 array_keys( Skin::getSkinNames() ),
 461                                 array( 'common' )
 462                         );
 463                         return !in_array( $name, $skins )
 464                                 && in_array( strtolower( $name ), $skins );
 465                 } else {
 466                         return false;
 467                 }
 468         }
 469
 470         /**
 471          * Does this EditPage class support section editing?
 472          * This is used by EditPage subclasses to indicate their ui cannot handle section edits
 473          *
 474          * @return bool
 475          */
 476         protected function isSectionEditSupported() {
 477                 return true;
 478         }
 479
 480         /**
 481          * @todo document
 482          * @param $request WebRequest
 483          */
 484         function importFormData( &$request ) {
 485                 global $wgLang, $wgUser;
 486
 487                 wfProfileIn( __METHOD__ );
 488
 489                 # Section edit can come from either the form or a link
 490                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 491
 492                 if ( $request->wasPosted() ) {
 493                         # These fields need to be checked for encoding.
 494                         # Also remove trailing whitespace, but don't remove _initial_
 495                         # whitespace from the text boxes. This may be significant formatting.
 496                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 497                         if ( !$request->getCheck('wpTextbox2') ) {
 498                                 // Skip this if wpTextbox2 has input, it indicates that we came
 499                                 // from a conflict page with raw page text, not a custom form
 500                                 // modified by subclasses
 501                                 wfProfileIn( get_class($this)."::importContentFormData" );
 502                                 $textbox1 = $this->importContentFormData( $request );
 503                                 if ( isset($textbox1) )
 504                                         $this->textbox1 = $textbox1;
 505                                 wfProfileOut( get_class($this)."::importContentFormData" );
 506                         }
 507
 508                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 509                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary' ), 250 );
 510
 511                         # Remove extra headings from summaries and new sections.
 512                         $this->summary = preg_replace('/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary);
 513
 514                         $this->edittime = $request->getVal( 'wpEdittime' );
 515                         $this->starttime = $request->getVal( 'wpStarttime' );
 516
 517                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 518
 519                         if ($this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null) {
 520                                 // wpTextbox1 field is missing, possibly due to being "too big"
 521                                 // according to some filter rules such as Suhosin's setting for
 522                                 // suhosin.request.max_value_length (d'oh)
 523                                 $this->incompleteForm = true;
 524                         } else {
 525                                 // edittime should be one of our last fields; if it's missing,
 526                                 // the submission probably broke somewhere in the middle.
 527                                 $this->incompleteForm = is_null( $this->edittime );
 528                         }
 529                         if ( $this->incompleteForm ) {
 530                                 # If the form is incomplete, force to preview.
 531                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 532                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 533                                 $this->preview = true;
 534                         } else {
 535                                 /* Fallback for live preview */
 536                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 537                                 $this->diff = $request->getCheck( 'wpDiff' );
 538
 539                                 // Remember whether a save was requested, so we can indicate
 540                                 // if we forced preview due to session failure.
 541                                 $this->mTriedSave = !$this->preview;
 542
 543                                 if ( $this->tokenOk( $request ) ) {
 544                                         # Some browsers will not report any submit button
 545                                         # if the user hits enter in the comment box.
 546                                         # The unmarked state will be assumed to be a save,
 547                                         # if the form seems otherwise complete.
 548                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 549                                 } elseif ( $this->diff ) {
 550                                         # Failed token check, but only requested "Show Changes".
 551                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 552                                 } else {
 553                                         # Page might be a hack attempt posted from
 554                                         # an external site. Preview instead of saving.
 555                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 556                                         $this->preview = true;
 557                                 }
 558                         }
 559                         $this->save = !$this->preview && !$this->diff;
 560                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 561                                 $this->edittime = null;
 562                         }
 563
 564                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 565                                 $this->starttime = null;
 566                         }
 567
 568                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 569
 570                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 571                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 572
 573                         # Don't force edit summaries when a user is editing their own user or talk page
 574                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 575                                 $this->mTitle->getText() == $wgUser->getName() )
 576                         {
 577                                 $this->allowBlankSummary = true;
 578                         } else {
 579                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary');
 580                         }
 581
 582                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 583                 } else {
 584                         # Not a posted form? Start with nothing.
 585                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 586                         $this->textbox1  = '';
 587                         $this->summary   = '';
 588                         $this->edittime  = '';
 589                         $this->starttime = wfTimestampNow();
 590                         $this->edit      = false;
 591                         $this->preview   = false;
 592                         $this->save      = false;
 593                         $this->diff      = false;
 594                         $this->minoredit = false;
 595                         $this->watchthis = $request->getBool( 'watchthis', false ); // Watch may be overriden by request parameters
 596                         $this->recreate  = false;
 597
 598                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 599                                 $this->summary = $request->getVal( 'preloadtitle' );
 600                         }
 601                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 602                                 $this->summary = $request->getText( 'summary' );
 603                         }
 604
 605                         if ( $request->getVal( 'minor' ) ) {
 606                                 $this->minoredit = true;
 607                         }
 608                 }
 609
 610                 $this->bot = $request->getBool( 'bot', true );
 611                 $this->nosummary = $request->getBool( 'nosummary' );
 612
 613                 // @todo FIXME: Unused variable?
 614                 $this->oldid = $request->getInt( 'oldid' );
 615
 616                 $this->live = $request->getCheck( 'live' );
 617                 $this->editintro = $request->getText( 'editintro',
 618                         // Custom edit intro for new sections
 619                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 620
 621                 // Allow extensions to modify form data
 622                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 623
 624                 wfProfileOut( __METHOD__ );
 625         }
 626
 627         /**
 628          * Subpage overridable method for extracting the page content data from the
 629          * posted form to be placed in $this->textbox1, if using customized input
 630          * this method should be overrided and return the page text that will be used
 631          * for saving, preview parsing and so on...
 632          *
 633          * @param $request WebRequest
 634          */
 635         protected function importContentFormData( &$request ) {
 636                 return; // Don't do anything, EditPage already extracted wpTextbox1
 637         }
 638
 639         /**
 640          * Initialise form fields in the object
 641          * Called on the first invocation, e.g. when a user clicks an edit link
 642          * @return bool -- if the requested section is valid
 643          */
 644         function initialiseForm() {
 645                 global $wgUser;
 646                 $this->edittime = $this->mArticle->getTimestamp();
 647                 $this->textbox1 = $this->getContent( false );
 648                 // activate checkboxes if user wants them to be always active
 649                 # Sort out the "watch" checkbox
 650                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 651                         # Watch all edits
 652                         $this->watchthis = true;
 653                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 654                         # Watch creations
 655                         $this->watchthis = true;
 656                 } elseif ( $this->mTitle->userIsWatching() ) {
 657                         # Already watched
 658                         $this->watchthis = true;
 659                 }
 660                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 661                         $this->minoredit = true;
 662                 }
 663                 if ( $this->textbox1 === false ) {
 664                         return false;
 665                 }
 666                 wfProxyCheck();
 667                 return true;
 668         }
 669
 670         /**
 671          * Fetch initial editing page content.
 672          *
 673          * @param $def_text string
 674          * @return mixed string on success, $def_text for invalid sections
 675          * @private
 676          */
 677         function getContent( $def_text = '' ) {
 678                 global $wgOut, $wgRequest, $wgParser;
 679
 680                 wfProfileIn( __METHOD__ );
 681                 # Get variables from query string :P
 682                 $section = $wgRequest->getVal( 'section' );
 683
 684                 $preload = $wgRequest->getVal( 'preload',
 685                         // Custom preload text for new sections
 686                         $section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 687                 $undoafter = $wgRequest->getVal( 'undoafter' );
 688                 $undo = $wgRequest->getVal( 'undo' );
 689
 690                 // For message page not locally set, use the i18n message.
 691                 // For other non-existent articles, use preload text if any.
 692                 if ( !$this->mTitle->exists() ) {
 693                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 694                                 # If this is a system message, get the default text.
 695                                 $text = $this->mTitle->getDefaultMessageText();
 696                                 if( $text === false ) {
 697                                         $text = $this->getPreloadedText( $preload );
 698                                 }
 699                         } else {
 700                                 # If requested, preload some text.
 701                                 $text = $this->getPreloadedText( $preload );
 702                         }
 703                 // For existing pages, get text based on "undo" or section parameters.
 704                 } else {
 705                         $text = $this->mArticle->getContent();
 706                         if ( $undo > 0 && $undoafter > 0 && $undo < $undoafter ) {
 707                                 # If they got undoafter and undo round the wrong way, switch them
 708                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 709                         }
 710                         if ( $undo > 0 && $undo > $undoafter ) {
 711                                 # Undoing a specific edit overrides section editing; section-editing
 712                                 # doesn't work with undoing.
 713                                 if ( $undoafter ) {
 714                                         $undorev = Revision::newFromId( $undo );
 715                                         $oldrev = Revision::newFromId( $undoafter );
 716                                 } else {
 717                                         $undorev = Revision::newFromId( $undo );
 718                                         $oldrev = $undorev ? $undorev->getPrevious() : null;
 719                                 }
 720
 721                                 # Sanity check, make sure it's the right page,
 722                                 # the revisions exist and they were not deleted.
 723                                 # Otherwise, $text will be left as-is.
 724                                 if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 725                                         $undorev->getPage() == $oldrev->getPage() &&
 726                                         $undorev->getPage() == $this->mArticle->getID() &&
 727                                         !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 728                                         !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 729
 730                                         $undotext = $this->mArticle->getUndoText( $undorev, $oldrev );
 731                                         if ( $undotext === false ) {
 732                                                 # Warn the user that something went wrong
 733                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-failure">' .
 734                                                         wfMsgNoTrans( 'undo-failure' ) . '</div>', true, /* interface */true );
 735                                         } else {
 736                                                 $text = $undotext;
 737                                                 # Inform the user of our success and set an automatic edit summary
 738                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="mw-undo-success">' .
 739                                                         wfMsgNoTrans( 'undo-success' ) . '</div>', true, /* interface */true );
 740                                                 $firstrev = $oldrev->getNext();
 741                                                 # If we just undid one rev, use an autosummary
 742                                                 if ( $firstrev->getId() == $undo ) {
 743                                                         $undoSummary = wfMsgForContent( 'undo-summary', $undo, $undorev->getUserText() );
 744                                                         if ( $this->summary === '' ) {
 745                                                                 $this->summary = $undoSummary;
 746                                                         } else {
 747                                                                 $this->summary = $undoSummary . wfMsgForContent( 'colon-separator' ) . $this->summary;
 748                                                         }
 749                                                         $this->undidRev = $undo;
 750                                                 }
 751                                                 $this->formtype = 'diff';
 752                                         }
 753                                 } else {
 754                                         // Failed basic sanity checks.
 755                                         // Older revisions may have been removed since the link
 756                                         // was created, or we may simply have got bogus input.
 757                                         $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-norev">' .
 758                                                 wfMsgNoTrans( 'undo-norev' ) . '</div>', true, /* interface */true );
 759                                 }
 760                         } elseif ( $section != '' ) {
 761                                 if ( $section == 'new' ) {
 762                                         $text = $this->getPreloadedText( $preload );
 763                                 } else {
 764                                         // Get section edit text (returns $def_text for invalid sections)
 765                                         $text = $wgParser->getSection( $text, $section, $def_text );
 766                                 }
 767                         }
 768                 }
 769
 770                 wfProfileOut( __METHOD__ );
 771                 return $text;
 772         }
 773
 774         /**
 775          * Use this method before edit() to preload some text into the edit box
 776          *
 777          * @param $text string
 778          */
 779         public function setPreloadedText( $text ) {
 780                 $this->mPreloadText = $text;
 781         }
 782
 783         /**
 784          * Get the contents to be preloaded into the box, either set by
 785          * an earlier setPreloadText() or by loading the given page.
 786          *
 787          * @param $preload String: representing the title to preload from.
 788          * @return String
 789          */
 790         protected function getPreloadedText( $preload ) {
 791                 global $wgUser, $wgParser;
 792
 793                 if ( !empty( $this->mPreloadText ) ) {
 794                         return $this->mPreloadText;
 795                 }
 796
 797                 if ( $preload === '' ) {
 798                         return '';
 799                 }
 800
 801                 $title = Title::newFromText( $preload );
 802                 # Check for existence to avoid getting MediaWiki:Noarticletext
 803                 if ( $title === null || !$title->exists() || !$title->userCan( 'read' ) ) {
 804                         return '';
 805                 }
 806
 807                 $page = WikiPage::factory( $title );
 808                 if ( $page->isRedirect() ) {
 809                         $title = $page->getRedirectTarget();
 810                         # Same as before
 811                         if ( $title === null || !$title->exists() || !$title->userCan( 'read' ) ) {
 812                                 return '';
 813                         }
 814                         $page = WikiPage::factory( $title );
 815                 }
 816
 817                 $parserOptions = ParserOptions::newFromUser( $wgUser );
 818                 return $wgParser->getPreloadText( $page->getRawText(), $title, $parserOptions );
 819         }
 820
 821         /**
 822          * Make sure the form isn't faking a user's credentials.
 823          *
 824          * @param $request WebRequest
 825          * @return bool
 826          * @private
 827          */
 828         function tokenOk( &$request ) {
 829                 global $wgUser;
 830                 $token = $request->getVal( 'wpEditToken' );
 831                 $this->mTokenOk = $wgUser->matchEditToken( $token );
 832                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
 833                 return $this->mTokenOk;
 834         }
 835
 836         /**
 837          * Attempt submission
 838          * @return bool false if output is done, true if the rest of the form should be displayed
 839          */
 840         function attemptSave() {
 841                 global $wgUser, $wgOut;
 842
 843                 $resultDetails = false;
 844                 # Allow bots to exempt some edits from bot flagging
 845                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
 846                 $status = $this->internalAttemptSave( $resultDetails, $bot );
 847                 // FIXME: once the interface for internalAttemptSave() is made nicer, this should use the message in $status
 848
 849                 if ( $status->value == self::AS_SUCCESS_UPDATE || $status->value == self::AS_SUCCESS_NEW_ARTICLE ) {
 850                         $this->didSave = true;
 851                 }
 852
 853                 switch ( $status->value ) {
 854                         case self::AS_HOOK_ERROR_EXPECTED:
 855                         case self::AS_CONTENT_TOO_BIG:
 856                         case self::AS_ARTICLE_WAS_DELETED:
 857                         case self::AS_CONFLICT_DETECTED:
 858                         case self::AS_SUMMARY_NEEDED:
 859                         case self::AS_TEXTBOX_EMPTY:
 860                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
 861                         case self::AS_END:
 862                                 return true;
 863
 864                         case self::AS_HOOK_ERROR:
 865                         case self::AS_FILTERING:
 866                                 return false;
 867
 868                         case self::AS_SUCCESS_NEW_ARTICLE:
 869                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
 870                                 $anchor = isset ( $resultDetails['sectionanchor'] ) ? $resultDetails['sectionanchor'] : '';
 871                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $anchor );
 872                                 return false;
 873
 874                         case self::AS_SUCCESS_UPDATE:
 875                                 $extraQuery = '';
 876                                 $sectionanchor = $resultDetails['sectionanchor'];
 877
 878                                 // Give extensions a chance to modify URL query on update
 879                                 wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this->mArticle, &$sectionanchor, &$extraQuery ) );
 880
 881                                 if ( $resultDetails['redirect'] ) {
 882                                         if ( $extraQuery == '' ) {
 883                                                 $extraQuery = 'redirect=no';
 884                                         } else {
 885                                                 $extraQuery = 'redirect=no&' . $extraQuery;
 886                                         }
 887                                 }
 888                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
 889                                 return false;
 890
 891                         case self::AS_BLANK_ARTICLE:
 892                                 $wgOut->redirect( $this->getContextTitle()->getFullURL() );
 893                                 return false;
 894
 895                         case self::AS_SPAM_ERROR:
 896                                 $this->spamPageWithContent( $resultDetails['spam'] );
 897                                 return false;
 898
 899                         case self::AS_BLOCKED_PAGE_FOR_USER:
 900                                 throw new UserBlockedError( $wgUser->mBlock );
 901
 902                         case self::AS_IMAGE_REDIRECT_ANON:
 903                         case self::AS_IMAGE_REDIRECT_LOGGED:
 904                                 throw new PermissionsError( 'upload' );
 905
 906                         case self::AS_READ_ONLY_PAGE_ANON:
 907                         case self::AS_READ_ONLY_PAGE_LOGGED:
 908                                 throw new PermissionsError( 'edit' );
 909
 910                         case self::AS_READ_ONLY_PAGE:
 911                                 throw new ReadOnlyError;
 912
 913                         case self::AS_RATE_LIMITED:
 914                                 throw new ThrottledError();
 915
 916                         case self::AS_NO_CREATE_PERMISSION:
 917                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
 918                                 throw new PermissionsError( $permission );
 919
 920                 }
 921                 return false;
 922         }
 923
 924         /**
 925          * Attempt submission (no UI)
 926          *
 927          * @param $result
 928          * @param $bot bool
 929          *
 930          * @return Status object, possibly with a message, but always with one of the AS_* constants in $status->value,
 931          *
 932          * FIXME: This interface is TERRIBLE, but hard to get rid of due to various error display idiosyncrasies. There are
 933          * also lots of cases where error metadata is set in the object and retrieved later instead of being returned, e.g.
 934          * AS_CONTENT_TOO_BIG and AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some time.
 935          */
 936         function internalAttemptSave( &$result, $bot = false ) {
 937                 global $wgFilterCallback, $wgUser, $wgRequest, $wgParser;
 938                 global $wgMaxArticleSize;
 939
 940                 $status = Status::newGood();
 941
 942                 wfProfileIn( __METHOD__  );
 943                 wfProfileIn( __METHOD__ . '-checks' );
 944
 945                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
 946                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
 947                         $status->fatal( 'hookaborted' );
 948                         $status->value = self::AS_HOOK_ERROR;
 949                         wfProfileOut( __METHOD__ . '-checks' );
 950                         wfProfileOut( __METHOD__  );
 951                         return $status;
 952                 }
 953
 954                 # Check image redirect
 955                 if ( $this->mTitle->getNamespace() == NS_FILE &&
 956                         Title::newFromRedirect( $this->textbox1 ) instanceof Title &&
 957                         !$wgUser->isAllowed( 'upload' ) ) {
 958                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
 959                                 $status->setResult( false, $code );
 960
 961                                 wfProfileOut( __METHOD__ . '-checks' );
 962                                 wfProfileOut( __METHOD__  );
 963
 964                                 return $status;
 965                 }
 966
 967                 # Check for spam
 968                 $match = self::matchSummarySpamRegex( $this->summary );
 969                 if ( $match === false ) {
 970                         $match = self::matchSpamRegex( $this->textbox1 );
 971                 }
 972                 if ( $match !== false ) {
 973                         $result['spam'] = $match;
 974                         $ip = $wgRequest->getIP();
 975                         $pdbk = $this->mTitle->getPrefixedDBkey();
 976                         $match = str_replace( "\n", '', $match );
 977                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
 978                         $status->fatal( 'spamprotectionmatch', $match );
 979                         $status->value = self::AS_SPAM_ERROR;
 980                         wfProfileOut( __METHOD__ . '-checks' );
 981                         wfProfileOut( __METHOD__ );
 982                         return $status;
 983                 }
 984                 if ( $wgFilterCallback && is_callable( $wgFilterCallback ) && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
 985                         # Error messages or other handling should be performed by the filter function
 986                         $status->setResult( false, self::AS_FILTERING );
 987                         wfProfileOut( __METHOD__ . '-checks' );
 988                         wfProfileOut( __METHOD__ );
 989                         return $status;
 990                 }
 991                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
 992                         # Error messages etc. could be handled within the hook...
 993                         $status->fatal( 'hookaborted' );
 994                         $status->value = self::AS_HOOK_ERROR;
 995                         wfProfileOut( __METHOD__ . '-checks' );
 996                         wfProfileOut( __METHOD__ );
 997                         return $status;
 998                 } elseif ( $this->hookError != '' ) {
 999                         # ...or the hook could be expecting us to produce an error
1000                         $status->fatal( 'hookaborted' );
1001                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1002                         wfProfileOut( __METHOD__ . '-checks' );
1003                         wfProfileOut( __METHOD__ );
1004                         return $status;
1005                 }
1006
1007                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1008                         // Auto-block user's IP if the account was "hard" blocked
1009                         $wgUser->spreadAnyEditBlock();
1010                         # Check block state against master, thus 'false'.
1011                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1012                         wfProfileOut( __METHOD__ . '-checks' );
1013                         wfProfileOut( __METHOD__ );
1014                         return $status;
1015                 }
1016
1017                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1018                 if ( $this->kblength > $wgMaxArticleSize ) {
1019                         // Error will be displayed by showEditForm()
1020                         $this->tooBig = true;
1021                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1022                         wfProfileOut( __METHOD__ . '-checks' );
1023                         wfProfileOut( __METHOD__ );
1024                         return $status;
1025                 }
1026
1027                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1028                         if ( $wgUser->isAnon() ) {
1029                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1030                                 wfProfileOut( __METHOD__ . '-checks' );
1031                                 wfProfileOut( __METHOD__ );
1032                                 return $status;
1033                         } else {
1034                                 $status->fatal( 'readonlytext' );
1035                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1036                                 wfProfileOut( __METHOD__ . '-checks' );
1037                                 wfProfileOut( __METHOD__ );
1038                                 return $status;
1039                         }
1040                 }
1041
1042                 if ( wfReadOnly() ) {
1043                         $status->fatal( 'readonlytext' );
1044                         $status->value = self::AS_READ_ONLY_PAGE;
1045                         wfProfileOut( __METHOD__ . '-checks' );
1046                         wfProfileOut( __METHOD__ );
1047                         return $status;
1048                 }
1049                 if ( $wgUser->pingLimiter() ) {
1050                         $status->fatal( 'actionthrottledtext' );
1051                         $status->value = self::AS_RATE_LIMITED;
1052                         wfProfileOut( __METHOD__ . '-checks' );
1053                         wfProfileOut( __METHOD__ );
1054                         return $status;
1055                 }
1056
1057                 # If the article has been deleted while editing, don't save it without
1058                 # confirmation
1059                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1060                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1061                         wfProfileOut( __METHOD__ . '-checks' );
1062                         wfProfileOut( __METHOD__ );
1063                         return $status;
1064                 }
1065
1066                 wfProfileOut( __METHOD__ . '-checks' );
1067
1068                 # If article is new, insert it.
1069                 $aid = $this->mTitle->getArticleID( Title::GAID_FOR_UPDATE );
1070                 $new = ( $aid == 0 );
1071
1072                 if ( $new ) {
1073                         // Late check for create permission, just in case *PARANOIA*
1074                         if ( !$this->mTitle->userCan( 'create' ) ) {
1075                                 $status->fatal( 'nocreatetext' );
1076                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1077                                 wfDebug( __METHOD__ . ": no create permission\n" );
1078                                 wfProfileOut( __METHOD__ );
1079                                 return $status;
1080                         }
1081
1082                         # Don't save a new article if it's blank.
1083                         if ( $this->textbox1 == '' ) {
1084                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1085                                 wfProfileOut( __METHOD__ );
1086                                 return $status;
1087                         }
1088
1089                         // Run post-section-merge edit filter
1090                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
1091                                 # Error messages etc. could be handled within the hook...
1092                                 $status->fatal( 'hookaborted' );
1093                                 $status->value = self::AS_HOOK_ERROR;
1094                                 wfProfileOut( __METHOD__ );
1095                                 return $status;
1096                         } elseif ( $this->hookError != '' ) {
1097                                 # ...or the hook could be expecting us to produce an error
1098                                 $status->fatal( 'hookaborted' );
1099                                 $status->value = self::AS_HOOK_ERROR_EXPECTED;
1100                                 wfProfileOut( __METHOD__ );
1101                                 return $status;
1102                         }
1103
1104                         # Handle the user preference to force summaries here. Check if it's not a redirect.
1105                         if ( !$this->allowBlankSummary && !Title::newFromRedirect( $this->textbox1 ) ) {
1106                                 if ( md5( $this->summary ) == $this->autoSumm ) {
1107                                         $this->missingSummary = true;
1108                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1109                                         $status->value = self::AS_SUMMARY_NEEDED;
1110                                         wfProfileOut( __METHOD__ );
1111                                         return $status;
1112                                 }
1113                         }
1114
1115                         $text = $this->textbox1;
1116                         $result['sectionanchor'] == '';
1117                         if ( $this->section == 'new' && $this->summary != '' ) {
1118                                 $text = wfMsgForContent( 'newsectionheaderdefaultlevel', $this->summary ) . "\n\n" . $text;
1119
1120                                 # Jump to the new section
1121                                 $result['sectionanchor'] = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1122
1123                                 # This is a new section, so create a link to the new section
1124                                 # in the revision summary.
1125                                 $cleanSummary = $wgParser->stripSectionName( $this->summary );
1126                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1127                         }
1128
1129                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1130
1131                 } else {
1132
1133                         # Article exists. Check for edit conflict.
1134
1135                         $this->mArticle->clear(); # Force reload of dates, etc.
1136
1137                         wfDebug( "timestamp: {$this->mArticle->getTimestamp()}, edittime: {$this->edittime}\n" );
1138
1139                         if ( $this->mArticle->getTimestamp() != $this->edittime ) {
1140                                 $this->isConflict = true;
1141                                 if ( $this->section == 'new' ) {
1142                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1143                                                 $this->mArticle->getComment() == $this->summary ) {
1144                                                 // Probably a duplicate submission of a new comment.
1145                                                 // This can happen when squid resends a request after
1146                                                 // a timeout but the first one actually went through.
1147                                                 wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
1148                                         } else {
1149                                                 // New comment; suppress conflict.
1150                                                 $this->isConflict = false;
1151                                                 wfDebug( __METHOD__ .": conflict suppressed; new section\n" );
1152                                         }
1153                                 } elseif ( $this->section == '' && $this->userWasLastToEdit( $wgUser->getId(), $this->edittime ) ) {
1154                                         # Suppress edit conflict with self, except for section edits where merging is required.
1155                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1156                                         $this->isConflict = false;
1157                                 }
1158                         }
1159
1160                         if ( $this->isConflict ) {
1161                                 wfDebug( __METHOD__ . ": conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
1162                                         $this->mArticle->getTimestamp() . "')\n" );
1163                                 $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime );
1164                         } else {
1165                                 wfDebug( __METHOD__ . ": getting section '$this->section'\n" );
1166                                 $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary );
1167                         }
1168                         if ( is_null( $text ) ) {
1169                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1170                                 $this->isConflict = true;
1171                                 $text = $this->textbox1; // do not try to merge here!
1172                         } elseif ( $this->isConflict ) {
1173                                 # Attempt merge
1174                                 if ( $this->mergeChangesInto( $text ) ) {
1175                                         // Successful merge! Maybe we should tell the user the good news?
1176                                         $this->isConflict = false;
1177                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1178                                 } else {
1179                                         $this->section = '';
1180                                         $this->textbox1 = $text;
1181                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1182                                 }
1183                         }
1184
1185                         if ( $this->isConflict ) {
1186                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1187                                 wfProfileOut( __METHOD__ );
1188                                 return $status;
1189                         }
1190
1191                         // Run post-section-merge edit filter
1192                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$this->hookError, $this->summary ) ) ) {
1193                                 # Error messages etc. could be handled within the hook...
1194                                 $status->fatal( 'hookaborted' );
1195                                 $status->value = self::AS_HOOK_ERROR;
1196                                 wfProfileOut( __METHOD__ );
1197                                 return $status;
1198                         } elseif ( $this->hookError != '' ) {
1199                                 # ...or the hook could be expecting us to produce an error
1200                                 $status->fatal( 'hookaborted' );
1201                                 $status->value = self::AS_HOOK_ERROR_EXPECTED;
1202                                 wfProfileOut( __METHOD__ );
1203                                 return $status;
1204                         }
1205
1206                         # Handle the user preference to force summaries here, but not for null edits
1207                         if ( $this->section != 'new' && !$this->allowBlankSummary
1208                                 && 0 != strcmp( $this->mArticle->getContent(), $text )
1209                                 && !Title::newFromRedirect( $text ) ) # check if it's not a redirect
1210                         {
1211                                 if ( md5( $this->summary ) == $this->autoSumm ) {
1212                                         $this->missingSummary = true;
1213                                         $status->fatal( 'missingsummary' );
1214                                         $status->value = self::AS_SUMMARY_NEEDED;
1215                                         wfProfileOut( __METHOD__ );
1216                                         return $status;
1217                                 }
1218                         }
1219
1220                         # And a similar thing for new sections
1221                         if ( $this->section == 'new' && !$this->allowBlankSummary ) {
1222                                 if ( trim( $this->summary ) == '' ) {
1223                                         $this->missingSummary = true;
1224                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1225                                         $status->value = self::AS_SUMMARY_NEEDED;
1226                                         wfProfileOut( __METHOD__ );
1227                                         return $status;
1228                                 }
1229                         }
1230
1231                         # All's well
1232                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1233                         $sectionanchor = '';
1234                         if ( $this->section == 'new' ) {
1235                                 if ( $this->textbox1 == '' ) {
1236                                         $this->missingComment = true;
1237                                         $status->fatal( 'missingcommenttext' );
1238                                         $status->value = self::AS_TEXTBOX_EMPTY;
1239                                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1240                                         wfProfileOut( __METHOD__ );
1241                                         return $status;
1242                                 }
1243                                 if ( $this->summary != '' ) {
1244                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1245                                         # This is a new section, so create a link to the new section
1246                                         # in the revision summary.
1247                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1248                                         $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1249                                 }
1250                         } elseif ( $this->section != '' ) {
1251                                 # Try to get a section anchor from the section source, redirect to edited section if header found
1252                                 # XXX: might be better to integrate this into Article::replaceSection
1253                                 # for duplicate heading checking and maybe parsing
1254                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1255                                 # we can't deal with anchors, includes, html etc in the header for now,
1256                                 # headline would need to be parsed to improve this
1257                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1258                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1259                                 }
1260                         }
1261                         $result['sectionanchor'] = $sectionanchor;
1262                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1263
1264                         // Save errors may fall down to the edit form, but we've now
1265                         // merged the section into full text. Clear the section field
1266                         // so that later submission of conflict forms won't try to
1267                         // replace that into a duplicated mess.
1268                         $this->textbox1 = $text;
1269                         $this->section = '';
1270
1271                         $status->value = self::AS_SUCCESS_UPDATE;
1272                 }
1273
1274                 // Check for length errors again now that the section is merged in
1275                 $this->kblength = (int)( strlen( $text ) / 1024 );
1276                 if ( $this->kblength > $wgMaxArticleSize ) {
1277                         $this->tooBig = true;
1278                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1279                         wfProfileOut( __METHOD__ );
1280                         return $status;
1281                 }
1282
1283                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1284                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1285                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1286                         ( $bot ? EDIT_FORCE_BOT : 0 );
1287
1288                 $doEditStatus = $this->mArticle->doEdit( $text, $this->summary, $flags );
1289
1290                 if ( $doEditStatus->isOK() ) {
1291                         $result['redirect'] = Title::newFromRedirect( $text ) !== null;
1292                         $this->commitWatch();
1293                         wfProfileOut( __METHOD__ );
1294                         return $status;
1295                 } else {
1296                         $this->isConflict = true;
1297                         $doEditStatus->value = self::AS_END; // Destroys data doEdit() put in $status->value but who cares
1298                         wfProfileOut( __METHOD__ );
1299                         return $doEditStatus;
1300                 }
1301         }
1302
1303         /**
1304          * Commit the change of watch status
1305          */
1306         protected function commitWatch() {
1307                 global $wgUser;
1308                 if ( $this->watchthis xor $this->mTitle->userIsWatching() ) {
1309                         $dbw = wfGetDB( DB_MASTER );
1310                         $dbw->begin();
1311                         if ( $this->watchthis ) {
1312                                 WatchAction::doWatch( $this->mTitle, $wgUser );
1313                         } else {
1314                                 WatchAction::doUnwatch( $this->mTitle, $wgUser );
1315                         }
1316                         $dbw->commit();
1317                 }
1318         }
1319
1320         /**
1321          * Check if no edits were made by other users since
1322          * the time a user started editing the page. Limit to
1323          * 50 revisions for the sake of performance.
1324          *
1325          * @param $id int
1326          * @param $edittime string
1327          *
1328          * @return bool
1329          */
1330         protected function userWasLastToEdit( $id, $edittime ) {
1331                 if( !$id ) return false;
1332                 $dbw = wfGetDB( DB_MASTER );
1333                 $res = $dbw->select( 'revision',
1334                         'rev_user',
1335                         array(
1336                                 'rev_page' => $this->mArticle->getId(),
1337                                 'rev_timestamp > '.$dbw->addQuotes( $dbw->timestamp($edittime) )
1338                         ),
1339                         __METHOD__,
1340                         array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
1341                 foreach ( $res as $row ) {
1342                         if( $row->rev_user != $id ) {
1343                                 return false;
1344                         }
1345                 }
1346                 return true;
1347         }
1348
1349         /**
1350          * @private
1351          * @todo document
1352          *
1353          * @parma $editText string
1354          *
1355          * @return bool
1356          */
1357         function mergeChangesInto( &$editText ){
1358                 wfProfileIn( __METHOD__ );
1359
1360                 $db = wfGetDB( DB_MASTER );
1361
1362                 // This is the revision the editor started from
1363                 $baseRevision = $this->getBaseRevision();
1364                 if ( is_null( $baseRevision ) ) {
1365                         wfProfileOut( __METHOD__ );
1366                         return false;
1367                 }
1368                 $baseText = $baseRevision->getText();
1369
1370                 // The current state, we want to merge updates into it
1371                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1372                 if ( is_null( $currentRevision ) ) {
1373                         wfProfileOut( __METHOD__ );
1374                         return false;
1375                 }
1376                 $currentText = $currentRevision->getText();
1377
1378                 $result = '';
1379                 if ( wfMerge( $baseText, $editText, $currentText, $result ) ) {
1380                         $editText = $result;
1381                         wfProfileOut( __METHOD__ );
1382                         return true;
1383                 } else {
1384                         wfProfileOut( __METHOD__ );
1385                         return false;
1386                 }
1387         }
1388
1389         /**
1390          * @return Revision
1391          */
1392         function getBaseRevision() {
1393                 if ( !$this->mBaseRevision ) {
1394                         $db = wfGetDB( DB_MASTER );
1395                         $baseRevision = Revision::loadFromTimestamp(
1396                                 $db, $this->mTitle, $this->edittime );
1397                         return $this->mBaseRevision = $baseRevision;
1398                 } else {
1399                         return $this->mBaseRevision;
1400                 }
1401         }
1402
1403         /**
1404          * Check given input text against $wgSpamRegex, and return the text of the first match.
1405          *
1406          * @param $text string
1407          *
1408          * @return string|false matching string or false
1409          */
1410         public static function matchSpamRegex( $text ) {
1411                 global $wgSpamRegex;
1412                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1413                 $regexes = (array)$wgSpamRegex;
1414                 return self::matchSpamRegexInternal( $text, $regexes );
1415         }
1416
1417         /**
1418          * Check given input text against $wgSpamRegex, and return the text of the first match.
1419          *
1420          * @parma $text string
1421          *
1422          * @return string|false  matching string or false
1423          */
1424         public static function matchSummarySpamRegex( $text ) {
1425                 global $wgSummarySpamRegex;
1426                 $regexes = (array)$wgSummarySpamRegex;
1427                 return self::matchSpamRegexInternal( $text, $regexes );
1428         }
1429
1430         /**
1431          * @param $text string
1432          * @param $regexes array
1433          * @return bool|string
1434          */
1435         protected static function matchSpamRegexInternal( $text, $regexes ) {
1436                 foreach( $regexes as $regex ) {
1437                         $matches = array();
1438                         if( preg_match( $regex, $text, $matches ) ) {
1439                                 return $matches[0];
1440                         }
1441                 }
1442                 return false;
1443         }
1444
1445         function setHeaders() {
1446                 global $wgOut;
1447                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1448                 if ( $this->isConflict ) {
1449                         $wgOut->setPageTitle( wfMessage( 'editconflict', $this->getContextTitle()->getPrefixedText() ) );
1450                 } elseif ( $this->section != '' ) {
1451                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1452                         $wgOut->setPageTitle( wfMessage( $msg, $this->getContextTitle()->getPrefixedText() ) );
1453                 } else {
1454                         # Use the title defined by DISPLAYTITLE magic word when present
1455                         if ( isset( $this->mParserOutput )
1456                          && ( $dt = $this->mParserOutput->getDisplayTitle() ) !== false ) {
1457                                 $title = $dt;
1458                         } else {
1459                                 $title = $this->getContextTitle()->getPrefixedText();
1460                         }
1461                         $wgOut->setPageTitle( wfMessage( 'editing', $title ) );
1462                 }
1463         }
1464
1465         /**
1466          * Show all applicable editing introductions
1467          */
1468         protected function showIntro() {
1469                 global $wgOut, $wgUser;
1470                 if ( $this->suppressIntro ) {
1471                         return;
1472                 }
1473
1474                 $namespace = $this->mTitle->getNamespace();
1475
1476                 if ( $namespace == NS_MEDIAWIKI ) {
1477                         # Show a warning if editing an interface message
1478                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
1479                 }
1480
1481                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
1482                 # Show log extract when the user is currently blocked
1483                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
1484                         $parts = explode( '/', $this->mTitle->getText(), 2 );
1485                         $username = $parts[0];
1486                         $user = User::newFromName( $username, false /* allow IP users*/ );
1487                         $ip = User::isIP( $username );
1488                         if ( !($user && $user->isLoggedIn()) && !$ip ) { # User does not exist
1489                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
1490                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
1491                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
1492                                 LogEventsList::showLogExtract(
1493                                         $wgOut,
1494                                         'block',
1495                                         $user->getUserPage(),
1496                                         '',
1497                                         array(
1498                                                 'lim' => 1,
1499                                                 'showIfEmpty' => false,
1500                                                 'msgKey' => array(
1501                                                         'blocked-notice-logextract',
1502                                                         $user->getName() # Support GENDER in notice
1503                                                 )
1504                                         )
1505                                 );
1506                         }
1507                 }
1508                 # Try to add a custom edit intro, or use the standard one if this is not possible.
1509                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
1510                         if ( $wgUser->isLoggedIn() ) {
1511                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1\n</div>", 'newarticletext' );
1512                         } else {
1513                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1\n</div>", 'newarticletextanon' );
1514                         }
1515                 }
1516                 # Give a notice if the user is editing a deleted/moved page...
1517                 if ( !$this->mTitle->exists() ) {
1518                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
1519                                 '', array( 'lim' => 10,
1520                                            'conds' => array( "log_action != 'revision'" ),
1521                                            'showIfEmpty' => false,
1522                                            'msgKey' => array( 'recreate-moveddeleted-warn') )
1523                         );
1524                 }
1525         }
1526
1527         /**
1528          * Attempt to show a custom editing introduction, if supplied
1529          *
1530          * @return bool
1531          */
1532         protected function showCustomIntro() {
1533                 if ( $this->editintro ) {
1534                         $title = Title::newFromText( $this->editintro );
1535                         if ( $title instanceof Title && $title->exists() && $title->userCanRead() ) {
1536                                 global $wgOut;
1537                                 // Added using template syntax, to take <noinclude>'s into account.
1538                                 $wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
1539                                 return true;
1540                         } else {
1541                                 return false;
1542                         }
1543                 } else {
1544                         return false;
1545                 }
1546         }
1547
1548         /**
1549          * Send the edit form and related headers to $wgOut
1550          * @param $formCallback Callback that takes an OutputPage parameter; will be called
1551          *     during form output near the top, for captchas and the like.
1552          */
1553         function showEditForm( $formCallback = null ) {
1554                 global $wgOut, $wgUser;
1555
1556                 wfProfileIn( __METHOD__ );
1557
1558                 #need to parse the preview early so that we know which templates are used,
1559                 #otherwise users with "show preview after edit box" will get a blank list
1560                 #we parse this near the beginning so that setHeaders can do the title
1561                 #setting work instead of leaving it in getPreviewText
1562                 $previewOutput = '';
1563                 if ( $this->formtype == 'preview' ) {
1564                         $previewOutput = $this->getPreviewText();
1565                 }
1566
1567                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) );
1568
1569                 $this->setHeaders();
1570
1571                 # Enabled article-related sidebar, toplinks, etc.
1572                 $wgOut->setArticleRelated( true );
1573
1574                 if ( $this->showHeader() === false ) {
1575                         wfProfileOut( __METHOD__ );
1576                         return;
1577                 }
1578
1579                 $action = htmlspecialchars( $this->getActionURL( $this->getContextTitle() ) );
1580
1581                 if ( $wgUser->getOption( 'showtoolbar' ) and !$this->isCssJsSubpage ) {
1582                         # prepare toolbar for edit buttons
1583                         $toolbar = EditPage::getEditToolbar();
1584                 } else {
1585                         $toolbar = '';
1586                 }
1587
1588
1589                 $wgOut->addHTML( $this->editFormPageTop );
1590
1591                 if ( $wgUser->getOption( 'previewontop' ) ) {
1592                         $this->displayPreviewArea( $previewOutput, true );
1593                 }
1594
1595                 $wgOut->addHTML( $this->editFormTextTop );
1596
1597                 $templates = $this->getTemplates();
1598                 $formattedtemplates = Linker::formatTemplates( $templates, $this->preview, $this->section != '');
1599
1600                 $hiddencats = $this->mArticle->getHiddenCategories();
1601                 $formattedhiddencats = Linker::formatHiddenCategories( $hiddencats );
1602
1603                 if ( $this->wasDeletedSinceLastEdit() && 'save' != $this->formtype ) {
1604                         $wgOut->wrapWikiMsg(
1605                                 "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
1606                                 'deletedwhileediting' );
1607                 } elseif ( $this->wasDeletedSinceLastEdit() ) {
1608                         // Hide the toolbar and edit area, user can click preview to get it back
1609                         // Add an confirmation checkbox and explanation.
1610                         $toolbar = '';
1611                         // @todo move this to a cleaner conditional instead of blanking a variable
1612                 }
1613                 $wgOut->addHTML( <<<HTML
1614 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1615 HTML
1616 );
1617
1618                 if ( is_callable( $formCallback ) ) {
1619                         call_user_func_array( $formCallback, array( &$wgOut ) );
1620                 }
1621
1622                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1623
1624                 // Put these up at the top to ensure they aren't lost on early form submission
1625                 $this->showFormBeforeText();
1626
1627                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
1628                         $username = $this->lastDelete->user_name;
1629                         $comment = $this->lastDelete->log_comment;
1630
1631                         // It is better to not parse the comment at all than to have templates expanded in the middle
1632                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
1633                         $key = $comment === ''
1634                                 ? 'confirmrecreate-noreason'
1635                                 : 'confirmrecreate';
1636                         $wgOut->addHTML(
1637                                 '<div class="mw-confirm-recreate">' .
1638                                 wfMsgExt( $key, 'parseinline', $username, "<nowiki>$comment</nowiki>" ) .
1639                                 Xml::checkLabel( wfMsg( 'recreate' ), 'wpRecreate', 'wpRecreate', false,
1640                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
1641                                 ) .
1642                                 '</div>'
1643                         );
1644                 }
1645
1646                 # If a blank edit summary was previously provided, and the appropriate
1647                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1648                 # user being bounced back more than once in the event that a summary
1649                 # is not required.
1650                 #####
1651                 # For a bit more sophisticated detection of blank summaries, hash the
1652                 # automatic one and pass that in the hidden field wpAutoSummary.
1653                 if ( $this->missingSummary ||
1654                         ( $this->section == 'new' && $this->nosummary ) )
1655                                 $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
1656                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1657                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
1658
1659                 $wgOut->addHTML( Html::hidden( 'oldid', $this->mArticle->getOldID() ) );
1660
1661                 if ( $this->section == 'new' ) {
1662                         $this->showSummaryInput( true, $this->summary );
1663                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
1664                 }
1665
1666                 $wgOut->addHTML( $this->editFormTextBeforeContent );
1667
1668                 $wgOut->addHTML( $toolbar );
1669
1670                 if ( $this->isConflict ) {
1671                         // In an edit conflict bypass the overrideable content form method
1672                         // and fallback to the raw wpTextbox1 since editconflicts can't be
1673                         // resolved between page source edits and custom ui edits using the
1674                         // custom edit ui.
1675                         $this->showTextbox1( null, $this->getContent() );
1676                 } else {
1677                         $this->showContentForm();
1678                 }
1679
1680                 $wgOut->addHTML( $this->editFormTextAfterContent );
1681
1682                 $wgOut->addWikiText( $this->getCopywarn() );
1683                 if ( isset($this->editFormTextAfterWarn) && $this->editFormTextAfterWarn !== '' )
1684                         $wgOut->addHTML( $this->editFormTextAfterWarn );
1685
1686                 $this->showStandardInputs();
1687
1688                 $this->showFormAfterText();
1689
1690                 $this->showTosSummary();
1691                 $this->showEditTools();
1692
1693                 $wgOut->addHTML( <<<HTML
1694 {$this->editFormTextAfterTools}
1695 <div class='templatesUsed'>
1696 {$formattedtemplates}
1697 </div>
1698 <div class='hiddencats'>
1699 {$formattedhiddencats}
1700 </div>
1701 HTML
1702 );
1703
1704                 if ( $this->isConflict )
1705                         $this->showConflict();
1706
1707                 $wgOut->addHTML( $this->editFormTextBottom );
1708                 $wgOut->addHTML( "</form>\n" );
1709                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1710                         $this->displayPreviewArea( $previewOutput, false );
1711                 }
1712
1713                 wfProfileOut( __METHOD__ );
1714         }
1715
1716         protected function showHeader() {
1717                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
1718                 if ( $this->isConflict ) {
1719                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
1720                         $this->edittime = $this->mArticle->getTimestamp();
1721                 } else {
1722                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
1723                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
1724                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
1725                                 // Someone is welcome to try refactoring though
1726                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
1727                                 return false;
1728                         }
1729
1730                         if ( $this->section != '' && $this->section != 'new' ) {
1731                                 $matches = array();
1732                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
1733                                         preg_match( "/^(=+)(.+)\\1/mi", $this->textbox1, $matches );
1734                                         if ( !empty( $matches[2] ) ) {
1735                                                 global $wgParser;
1736                                                 $this->summary = "/* " .
1737                                                         $wgParser->stripSectionName(trim($matches[2])) .
1738                                                         " */ ";
1739                                         }
1740                                 }
1741                         }
1742
1743                         if ( $this->missingComment ) {
1744                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
1745                         }
1746
1747                         if ( $this->missingSummary && $this->section != 'new' ) {
1748                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
1749                         }
1750
1751                         if ( $this->missingSummary && $this->section == 'new' ) {
1752                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
1753                         }
1754
1755                         if ( $this->hookError !== '' ) {
1756                                 $wgOut->addWikiText( $this->hookError );
1757                         }
1758
1759                         if ( !$this->checkUnicodeCompliantBrowser() ) {
1760                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
1761                         }
1762
1763                         if ( isset( $this->mArticle ) && isset( $this->mArticle->mRevision ) ) {
1764                         // Let sysop know that this will make private content public if saved
1765
1766                                 if ( !$this->mArticle->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1767                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
1768                                 } elseif ( $this->mArticle->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1769                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
1770                                 }
1771
1772                                 if ( !$this->mArticle->mRevision->isCurrent() ) {
1773                                         $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
1774                                         $wgOut->addWikiMsg( 'editingold' );
1775                                 }
1776                         }
1777                 }
1778
1779                 if ( wfReadOnly() ) {
1780                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
1781                 } elseif ( $wgUser->isAnon() ) {
1782                         if ( $this->formtype != 'preview' ) {
1783                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
1784                         } else {
1785                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
1786                         }
1787                 } else {
1788                         if ( $this->isCssJsSubpage ) {
1789                                 # Check the skin exists
1790                                 if ( $this->isWrongCaseCssJsPage ) {
1791                                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
1792                                 }
1793                                 if ( $this->formtype !== 'preview' ) {
1794                                         if ( $this->isCssSubpage )
1795                                                 $wgOut->wrapWikiMsg( "<div id='mw-usercssyoucanpreview'>\n$1\n</div>", array( 'usercssyoucanpreview' ) );
1796                                         if ( $this->isJsSubpage )
1797                                                 $wgOut->wrapWikiMsg( "<div id='mw-userjsyoucanpreview'>\n$1\n</div>", array( 'userjsyoucanpreview' ) );
1798                                 }
1799                         }
1800                 }
1801
1802                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
1803                         # Is the title semi-protected?
1804                         if ( $this->mTitle->isSemiProtected() ) {
1805                                 $noticeMsg = 'semiprotectedpagewarning';
1806                         } else {
1807                                 # Then it must be protected based on static groups (regular)
1808                                 $noticeMsg = 'protectedpagewarning';
1809                         }
1810                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
1811                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
1812                 }
1813                 if ( $this->mTitle->isCascadeProtected() ) {
1814                         # Is this page under cascading protection from some source pages?
1815                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
1816                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
1817                         $cascadeSourcesCount = count( $cascadeSources );
1818                         if ( $cascadeSourcesCount > 0 ) {
1819                                 # Explain, and list the titles responsible
1820                                 foreach( $cascadeSources as $page ) {
1821                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
1822                                 }
1823                         }
1824                         $notice .= '</div>';
1825                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
1826                 }
1827                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
1828                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
1829                                 array(  'lim' => 1,
1830                                         'showIfEmpty' => false,
1831                                         'msgKey' => array( 'titleprotectedwarning' ),
1832                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
1833                 }
1834
1835                 if ( $this->kblength === false ) {
1836                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1837                 }
1838
1839                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
1840                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
1841                                 array( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) ) );
1842                 } else {
1843                         if( !wfMessage('longpage-hint')->isDisabled() ) {
1844                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
1845                                         array( 'longpage-hint', $wgLang->formatSize( strlen( $this->textbox1 ) ), strlen( $this->textbox1 ) )
1846                                 );
1847                         }
1848                 }
1849         }
1850
1851         /**
1852          * Standard summary input and label (wgSummary), abstracted so EditPage
1853          * subclasses may reorganize the form.
1854          * Note that you do not need to worry about the label's for=, it will be
1855          * inferred by the id given to the input. You can remove them both by
1856          * passing array( 'id' => false ) to $userInputAttrs.
1857          *
1858          * @param $summary string The value of the summary input
1859          * @param $labelText string The html to place inside the label
1860          * @param $inputAttrs array of attrs to use on the input
1861          * @param $spanLabelAttrs array of attrs to use on the span inside the label
1862          *
1863          * @return array An array in the format array( $label, $input )
1864          */
1865         function getSummaryInput($summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null) {
1866                 //Note: the maxlength is overriden in JS to 250 and to make it use UTF-8 bytes, not characters.
1867                 $inputAttrs = ( is_array($inputAttrs) ? $inputAttrs : array() ) + array(
1868                         'id' => 'wpSummary',
1869                         'maxlength' => '200',
1870                         'tabindex' => '1',
1871                         'size' => 60,
1872                         'spellcheck' => 'true',
1873                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
1874
1875                 $spanLabelAttrs = ( is_array($spanLabelAttrs) ? $spanLabelAttrs : array() ) + array(
1876                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
1877                         'id' => "wpSummaryLabel"
1878                 );
1879
1880                 $label = null;
1881                 if ( $labelText ) {
1882                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
1883                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
1884                 }
1885
1886                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
1887
1888                 return array( $label, $input );
1889         }
1890
1891         /**
1892          * @param $isSubjectPreview Boolean: true if this is the section subject/title
1893          *                          up top, or false if this is the comment summary
1894          *                          down below the textarea
1895          * @param $summary String: The text of the summary to display
1896          * @return String
1897          */
1898         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
1899                 global $wgOut, $wgContLang;
1900                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
1901                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
1902                 if ( $isSubjectPreview ) {
1903                         if ( $this->nosummary ) {
1904                                 return;
1905                         }
1906                 } else {
1907                         if ( !$this->mShowSummaryField ) {
1908                                 return;
1909                         }
1910                 }
1911                 $summary = $wgContLang->recodeForEdit( $summary );
1912                 $labelText = wfMsgExt( $isSubjectPreview ? 'subject' : 'summary', 'parseinline' );
1913                 list($label, $input) = $this->getSummaryInput($summary, $labelText, array( 'class' => $summaryClass ), array());
1914                 $wgOut->addHTML("{$label} {$input}");
1915         }
1916
1917         /**
1918          * @param $isSubjectPreview Boolean: true if this is the section subject/title
1919          *                          up top, or false if this is the comment summary
1920          *                          down below the textarea
1921          * @param $summary String: the text of the summary to display
1922          * @return String
1923          */
1924         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
1925                 if ( !$summary || ( !$this->preview && !$this->diff ) )
1926                         return "";
1927
1928                 global $wgParser;
1929
1930                 if ( $isSubjectPreview )
1931                         $summary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $summary ) );
1932
1933                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
1934
1935                 $summary = wfMsgExt( $message, 'parseinline' ) . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
1936                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
1937         }
1938
1939         protected function showFormBeforeText() {
1940                 global $wgOut;
1941                 $section = htmlspecialchars( $this->section );
1942                 $wgOut->addHTML( <<<HTML
1943 <input type='hidden' value="{$section}" name="wpSection" />
1944 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
1945 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
1946 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
1947
1948 HTML
1949                 );
1950                 if ( !$this->checkUnicodeCompliantBrowser() )
1951                         $wgOut->addHTML(Html::hidden( 'safemode', '1' ));
1952         }
1953
1954         protected function showFormAfterText() {
1955                 global $wgOut, $wgUser;
1956                 /**
1957                  * To make it harder for someone to slip a user a page
1958                  * which submits an edit form to the wiki without their
1959                  * knowledge, a random token is associated with the login
1960                  * session. If it's not passed back with the submission,
1961                  * we won't save the page, or render user JavaScript and
1962                  * CSS previews.
1963                  *
1964                  * For anon editors, who may not have a session, we just
1965                  * include the constant suffix to prevent editing from
1966                  * broken text-mangling proxies.
1967                  */
1968                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->getEditToken() ) . "\n" );
1969         }
1970
1971         /**
1972          * Subpage overridable method for printing the form for page content editing
1973          * By default this simply outputs wpTextbox1
1974          * Subclasses can override this to provide a custom UI for editing;
1975          * be it a form, or simply wpTextbox1 with a modified content that will be
1976          * reverse modified when extracted from the post data.
1977          * Note that this is basically the inverse for importContentFormData
1978          */
1979         protected function showContentForm() {
1980                 $this->showTextbox1();
1981         }
1982
1983         /**
1984          * Method to output wpTextbox1
1985          * The $textoverride method can be used by subclasses overriding showContentForm
1986          * to pass back to this method.
1987          *
1988          * @param $customAttribs An array of html attributes to use in the textarea
1989          * @param $textoverride String: optional text to override $this->textarea1 with
1990          */
1991         protected function showTextbox1($customAttribs = null, $textoverride = null) {
1992                 $classes = array(); // Textarea CSS
1993                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
1994                         # Is the title semi-protected?
1995                         if ( $this->mTitle->isSemiProtected() ) {
1996                                 $classes[] = 'mw-textarea-sprotected';
1997                         } else {
1998                                 # Then it must be protected based on static groups (regular)
1999                                 $classes[] = 'mw-textarea-protected';
2000                         }
2001                         # Is the title cascade-protected?
2002                         if ( $this->mTitle->isCascadeProtected() ) {
2003                                 $classes[] = 'mw-textarea-cprotected';
2004                         }
2005                 }
2006                 $attribs = array( 'tabindex' => 1 );
2007                 if ( is_array($customAttribs) )
2008                         $attribs += $customAttribs;
2009
2010                 if ( $this->wasDeletedSinceLastEdit() )
2011                         $attribs['type'] = 'hidden';
2012                 if ( !empty( $classes ) ) {
2013                         if ( isset($attribs['class']) )
2014                                 $classes[] = $attribs['class'];
2015                         $attribs['class'] = implode( ' ', $classes );
2016                 }
2017
2018                 $this->showTextbox( isset($textoverride) ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
2019         }
2020
2021         protected function showTextbox2() {
2022                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2023         }
2024
2025         protected function showTextbox( $content, $name, $customAttribs = array() ) {
2026                 global $wgOut, $wgUser;
2027
2028                 $wikitext = $this->safeUnicodeOutput( $content );
2029                 if ( strval($wikitext) !== '' ) {
2030                         // Ensure there's a newline at the end, otherwise adding lines
2031                         // is awkward.
2032                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2033                         // mode will show an extra newline. A bit annoying.
2034                         $wikitext .= "\n";
2035                 }
2036
2037                 $attribs = $customAttribs + array(
2038                         'accesskey' => ',',
2039                         'id'   => $name,
2040                         'cols' => $wgUser->getIntOption( 'cols' ),
2041                         'rows' => $wgUser->getIntOption( 'rows' ),
2042                         'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
2043                 );
2044
2045                 $pageLang = $this->mTitle->getPageLanguage();
2046                 $attribs['lang'] = $pageLang->getCode();
2047                 $attribs['dir'] = $pageLang->getDir();
2048
2049                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2050         }
2051
2052         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2053                 global $wgOut;
2054                 $classes = array();
2055                 if ( $isOnTop )
2056                         $classes[] = 'ontop';
2057
2058                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2059
2060                 if ( $this->formtype != 'preview' )
2061                         $attribs['style'] = 'display: none;';
2062
2063                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
2064
2065                 if ( $this->formtype == 'preview' ) {
2066                         $this->showPreview( $previewOutput );
2067                 }
2068
2069                 $wgOut->addHTML( '</div>' );
2070
2071                 if ( $this->formtype == 'diff') {
2072                         $this->showDiff();
2073                 }
2074         }
2075
2076         /**
2077          * Append preview output to $wgOut.
2078          * Includes category rendering if this is a category page.
2079          *
2080          * @param $text String: the HTML to be output for the preview.
2081          */
2082         protected function showPreview( $text ) {
2083                 global $wgOut;
2084                 if ( $this->mTitle->getNamespace() == NS_CATEGORY) {
2085                         $this->mArticle->openShowCategory();
2086                 }
2087                 # This hook seems slightly odd here, but makes things more
2088                 # consistent for extensions.
2089                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
2090                 $wgOut->addHTML( $text );
2091                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2092                         $this->mArticle->closeShowCategory();
2093                 }
2094         }
2095
2096         /**
2097          * Get a diff between the current contents of the edit box and the
2098          * version of the page we're editing from.
2099          *
2100          * If this is a section edit, we'll replace the section as for final
2101          * save and then make a comparison.
2102          */
2103         function showDiff() {
2104                 global $wgUser, $wgContLang, $wgParser;
2105
2106                 $oldtext = $this->mArticle->fetchContent();
2107                 $newtext = $this->mArticle->replaceSection(
2108                         $this->section, $this->textbox1, $this->summary, $this->edittime );
2109
2110                 wfRunHooks( 'EditPageGetDiffText', array( $this, &$newtext ) );
2111
2112                 $popts = ParserOptions::newFromUserAndLang( $wgUser, $wgContLang );
2113                 $newtext = $wgParser->preSaveTransform( $newtext, $this->mTitle, $wgUser, $popts );
2114                 $oldtitle = wfMsgExt( 'currentrev', array( 'parseinline' ) );
2115                 $newtitle = wfMsgExt( 'yourtext', array( 'parseinline' ) );
2116                 if ( $oldtext !== false  || $newtext != '' ) {
2117                         $de = new DifferenceEngine( $this->mArticle->getContext() );
2118                         $de->setText( $oldtext, $newtext );
2119                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2120                         $de->showDiffStyle();
2121                 } else {
2122                         $difftext = '';
2123                 }
2124
2125                 global $wgOut;
2126                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2127         }
2128
2129         /**
2130          * Give a chance for site and per-namespace customizations of
2131          * terms of service summary link that might exist separately
2132          * from the copyright notice.
2133          *
2134          * This will display between the save button and the edit tools,
2135          * so should remain short!
2136          */
2137         protected function showTosSummary() {
2138                 $msg = 'editpage-tos-summary';
2139                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
2140                 if( !wfMessage( $msg )->isDisabled() ) {
2141                         global $wgOut;
2142                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
2143                         $wgOut->addWikiMsg( $msg );
2144                         $wgOut->addHTML( '</div>' );
2145                 }
2146         }
2147
2148         protected function showEditTools() {
2149                 global $wgOut;
2150                 $wgOut->addHTML( '<div class="mw-editTools">' .
2151                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
2152                         '</div>' );
2153         }
2154
2155         protected function getCopywarn() {
2156                 global $wgRightsText;
2157                 if ( $wgRightsText ) {
2158                         $copywarnMsg = array( 'copyrightwarning',
2159                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
2160                                 $wgRightsText );
2161                 } else {
2162                         $copywarnMsg = array( 'copyrightwarning2',
2163                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
2164                 }
2165                 // Allow for site and per-namespace customization of contribution/copyright notice.
2166                 wfRunHooks( 'EditPageCopyrightWarning', array( $this->mTitle, &$copywarnMsg ) );
2167
2168                 return "<div id=\"editpage-copywarn\">\n" .
2169                         call_user_func_array("wfMsgNoTrans", $copywarnMsg) . "\n</div>";
2170         }
2171
2172         protected function showStandardInputs( &$tabindex = 2 ) {
2173                 global $wgOut;
2174                 $wgOut->addHTML( "<div class='editOptions'>\n" );
2175
2176                 if ( $this->section != 'new' ) {
2177                         $this->showSummaryInput( false, $this->summary );
2178                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
2179                 }
2180
2181                 $checkboxes = $this->getCheckboxes( $tabindex,
2182                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
2183                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
2184                 $wgOut->addHTML( "<div class='editButtons'>\n" );
2185                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
2186
2187                 $cancel = $this->getCancelLink();
2188                 if ( $cancel !== '' ) {
2189                         $cancel .= wfMsgExt( 'pipe-separator' , 'escapenoentities' );
2190                 }
2191                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ) );
2192                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
2193                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
2194                         htmlspecialchars( wfMsg( 'newwindow' ) );
2195                 $wgOut->addHTML( "      <span class='editHelp'>{$cancel}{$edithelp}</span>\n" );
2196                 $wgOut->addHTML( "</div><!-- editButtons -->\n</div><!-- editOptions -->\n" );
2197         }
2198
2199         /**
2200          * Show an edit conflict. textbox1 is already shown in showEditForm().
2201          * If you want to use another entry point to this function, be careful.
2202          */
2203         protected function showConflict() {
2204                 global $wgOut;
2205                 $this->textbox2 = $this->textbox1;
2206                 $this->textbox1 = $this->getContent();
2207                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
2208                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2209
2210                         $de = new DifferenceEngine( $this->mArticle->getContext() );
2211                         $de->setText( $this->textbox2, $this->textbox1 );
2212                         $de->showDiff( wfMsgExt( 'yourtext', 'parseinline' ), wfMsg( 'storedversion' ) );
2213
2214                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2215                         $this->showTextbox2();
2216                 }
2217         }
2218
2219         /**
2220          * @return string
2221          */
2222         public function getCancelLink() {
2223                 $cancelParams = array();
2224                 if ( !$this->isConflict && $this->mArticle->getOldID() > 0 ) {
2225                         $cancelParams['oldid'] = $this->mArticle->getOldID();
2226                 }
2227
2228                 return Linker::linkKnown(
2229                         $this->getContextTitle(),
2230                         wfMsgExt( 'cancel', array( 'parseinline' ) ),
2231                         array( 'id' => 'mw-editform-cancel' ),
2232                         $cancelParams
2233                 );
2234         }
2235
2236         /**
2237          * Returns the URL to use in the form's action attribute.
2238          * This is used by EditPage subclasses when simply customizing the action
2239          * variable in the constructor is not enough. This can be used when the
2240          * EditPage lives inside of a Special page rather than a custom page action.
2241          *
2242          * @param $title Title object for which is being edited (where we go to for &action= links)
2243          * @return string
2244          */
2245         protected function getActionURL( Title $title ) {
2246                 return $title->getLocalURL( array( 'action' => $this->action ) );
2247         }
2248
2249         /**
2250          * Check if a page was deleted while the user was editing it, before submit.
2251          * Note that we rely on the logging table, which hasn't been always there,
2252          * but that doesn't matter, because this only applies to brand new
2253          * deletes.
2254          */
2255         protected function wasDeletedSinceLastEdit() {
2256                 if ( $this->deletedSinceEdit !== null ) {
2257                         return $this->deletedSinceEdit;
2258                 }
2259
2260                 $this->deletedSinceEdit = false;
2261
2262                 if ( $this->mTitle->isDeletedQuick() ) {
2263                         $this->lastDelete = $this->getLastDelete();
2264                         if ( $this->lastDelete ) {
2265                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
2266                                 if ( $deleteTime > $this->starttime ) {
2267                                         $this->deletedSinceEdit = true;
2268                                 }
2269                         }
2270                 }
2271
2272                 return $this->deletedSinceEdit;
2273         }
2274
2275         protected function getLastDelete() {
2276                 $dbr = wfGetDB( DB_SLAVE );
2277                 $data = $dbr->selectRow(
2278                         array( 'logging', 'user' ),
2279                         array( 'log_type',
2280                                    'log_action',
2281                                    'log_timestamp',
2282                                    'log_user',
2283                                    'log_namespace',
2284                                    'log_title',
2285                                    'log_comment',
2286                                    'log_params',
2287                                    'log_deleted',
2288                                    'user_name' ),
2289                         array( 'log_namespace' => $this->mTitle->getNamespace(),
2290                                    'log_title' => $this->mTitle->getDBkey(),
2291                                    'log_type' => 'delete',
2292                                    'log_action' => 'delete',
2293                                    'user_id=log_user' ),
2294                         __METHOD__,
2295                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
2296                 );
2297                 // Quick paranoid permission checks...
2298                 if( is_object( $data ) ) {
2299                         if( $data->log_deleted & LogPage::DELETED_USER )
2300                                 $data->user_name = wfMsgHtml( 'rev-deleted-user' );
2301                         if( $data->log_deleted & LogPage::DELETED_COMMENT )
2302                                 $data->log_comment = wfMsgHtml( 'rev-deleted-comment' );
2303                 }
2304                 return $data;
2305         }
2306
2307         /**
2308          * Get the rendered text for previewing.
2309          * @return string
2310          */
2311         function getPreviewText() {
2312                 global $wgOut, $wgUser, $wgParser, $wgRawHtml;
2313
2314                 wfProfileIn( __METHOD__ );
2315
2316                 if ( $wgRawHtml && !$this->mTokenOk ) {
2317                         // Could be an offsite preview attempt. This is very unsafe if
2318                         // HTML is enabled, as it could be an attack.
2319                         $parsedNote = '';
2320                         if ( $this->textbox1 !== '' ) {
2321                                 // Do not put big scary notice, if previewing the empty
2322                                 // string, which happens when you initially edit
2323                                 // a category page, due to automatic preview-on-open.
2324                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
2325                                         wfMsg( 'session_fail_preview_html' ) . "</div>", true, /* interface */true );
2326                         }
2327                         wfProfileOut( __METHOD__ );
2328                         return $parsedNote;
2329                 }
2330
2331                 if ( $this->mTriedSave && !$this->mTokenOk ) {
2332                         if ( $this->mTokenOkExceptSuffix ) {
2333                                 $note = wfMsg( 'token_suffix_mismatch' );
2334                         } else {
2335                                 $note = wfMsg( 'session_fail_preview' );
2336                         }
2337                 } elseif ( $this->incompleteForm ) {
2338                         $note = wfMsg( 'edit_form_incomplete' );
2339                 } else {
2340                         $note = wfMsg( 'previewnote' );
2341                 }
2342
2343                 $parserOptions = ParserOptions::newFromUser( $wgUser );
2344                 $parserOptions->setEditSection( false );
2345                 $parserOptions->setTidy( true );
2346                 $parserOptions->setIsPreview( true );
2347                 $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
2348
2349                 # don't parse non-wikitext pages, show message about preview
2350                 # XXX: stupid php bug won't let us use $this->getContextTitle()->isCssJsSubpage() here -- This note has been there since r3530. Sure the bug was fixed time ago?
2351
2352                 if ( $this->isCssJsSubpage || !$this->mTitle->isWikitextPage() ) {
2353                         if( $this->mTitle->isCssJsSubpage() ) {
2354                                 $level = 'user';
2355                         } elseif( $this->mTitle->isCssOrJsPage() ) {
2356                                 $level = 'site';
2357                         } else {
2358                                 $level = false;
2359                         }
2360
2361                         # Used messages to make sure grep find them:
2362                         # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
2363                         if( $level ) {
2364                                 if (preg_match( "/\\.css$/", $this->mTitle->getText() ) ) {
2365                                         $previewtext = "<div id='mw-{$level}csspreview'>\n" . wfMsg( "{$level}csspreview" ) . "\n</div>";
2366                                         $class = "mw-code mw-css";
2367                                 } elseif (preg_match( "/\\.js$/", $this->mTitle->getText() ) ) {
2368                                         $previewtext = "<div id='mw-{$level}jspreview'>\n" . wfMsg( "{$level}jspreview" ) . "\n</div>";
2369                                         $class = "mw-code mw-js";
2370                                 } else {
2371                                         throw new MWException( 'A CSS/JS (sub)page but which is not css nor js!' );
2372                                 }
2373                         }
2374
2375                         $parserOutput = $wgParser->parse( $previewtext, $this->mTitle, $parserOptions );
2376                         $previewHTML = $parserOutput->mText;
2377                         $previewHTML .= "<pre class=\"$class\" dir=\"ltr\">\n" . htmlspecialchars( $this->textbox1 ) . "\n</pre>\n";
2378                 } else {
2379                         $rt = Title::newFromRedirectArray( $this->textbox1 );
2380                         if ( $rt ) {
2381                                 $previewHTML = $this->mArticle->viewRedirect( $rt, false );
2382                         } else {
2383                                 $toparse = $this->textbox1;
2384
2385                                 # If we're adding a comment, we need to show the
2386                                 # summary as the headline
2387                                 if ( $this->section == "new" && $this->summary != "" ) {
2388                                         $toparse = "== {$this->summary} ==\n\n" . $toparse;
2389                                 }
2390
2391                                 wfRunHooks( 'EditPageGetPreviewText', array( $this, &$toparse ) );
2392
2393                                 $parserOptions->enableLimitReport();
2394
2395                                 $toparse = $wgParser->preSaveTransform( $toparse, $this->mTitle, $wgUser, $parserOptions );
2396                                 $parserOutput = $wgParser->parse( $toparse, $this->mTitle, $parserOptions );
2397
2398                                 $previewHTML = $parserOutput->getText();
2399                                 $this->mParserOutput = $parserOutput;
2400                                 $wgOut->addParserOutputNoText( $parserOutput );
2401
2402                                 if ( count( $parserOutput->getWarnings() ) ) {
2403                                         $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
2404                                 }
2405                         }
2406                 }
2407
2408                 if( $this->isConflict ) {
2409                         $conflict = '<h2 id="mw-previewconflict">' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
2410                 } else {
2411                         $conflict = '<hr />';
2412                 }
2413
2414                 $previewhead = "<div class='previewnote'>\n" .
2415                         '<h2 id="mw-previewheader">' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>" .
2416                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
2417
2418                 $pageLang = $this->mTitle->getPageLanguage();
2419                 $attribs = array( 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
2420                         'class' => 'mw-content-'.$pageLang->getDir() );
2421                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
2422
2423                 wfProfileOut( __METHOD__ );
2424                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
2425         }
2426
2427         /**
2428          * @return Array
2429          */
2430         function getTemplates() {
2431                 if ( $this->preview || $this->section != '' ) {
2432                         $templates = array();
2433                         if ( !isset( $this->mParserOutput ) ) {
2434                                 return $templates;
2435                         }
2436                         foreach( $this->mParserOutput->getTemplates() as $ns => $template) {
2437                                 foreach( array_keys( $template ) as $dbk ) {
2438                                         $templates[] = Title::makeTitle($ns, $dbk);
2439                                 }
2440                         }
2441                         return $templates;
2442                 } else {
2443                         return $this->mArticle->getUsedTemplates();
2444                 }
2445         }
2446
2447         /**
2448          * Shows a bulletin board style toolbar for common editing functions.
2449          * It can be disabled in the user preferences.
2450          * The necessary JavaScript code can be found in skins/common/edit.js.
2451          *
2452          * @return string
2453          */
2454         static function getEditToolbar() {
2455                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
2456                 global $wgUseTeX, $wgEnableUploads, $wgForeignFileRepos;
2457
2458                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
2459
2460                 /**
2461                  * $toolarray is an array of arrays each of which includes the
2462                  * filename of the button image (without path), the opening
2463                  * tag, the closing tag, optionally a sample text that is
2464                  * inserted between the two when no selection is highlighted
2465                  * and.  The tip text is shown when the user moves the mouse
2466                  * over the button.
2467                  *
2468                  * Also here: accesskeys (key), which are not used yet until
2469                  * someone can figure out a way to make them work in
2470                  * IE. However, we should make sure these keys are not defined
2471                  * on the edit page.
2472                  */
2473                 $toolarray = array(
2474                         array(
2475                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
2476                                 'id'     => 'mw-editbutton-bold',
2477                                 'open'   => '\'\'\'',
2478                                 'close'  => '\'\'\'',
2479                                 'sample' => wfMsg( 'bold_sample' ),
2480                                 'tip'    => wfMsg( 'bold_tip' ),
2481                                 'key'    => 'B'
2482                         ),
2483                         array(
2484                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
2485                                 'id'     => 'mw-editbutton-italic',
2486                                 'open'   => '\'\'',
2487                                 'close'  => '\'\'',
2488                                 'sample' => wfMsg( 'italic_sample' ),
2489                                 'tip'    => wfMsg( 'italic_tip' ),
2490                                 'key'    => 'I'
2491                         ),
2492                         array(
2493                                 'image'  => $wgLang->getImageFile( 'button-link' ),
2494                                 'id'     => 'mw-editbutton-link',
2495                                 'open'   => '[[',
2496                                 'close'  => ']]',
2497                                 'sample' => wfMsg( 'link_sample' ),
2498                                 'tip'    => wfMsg( 'link_tip' ),
2499                                 'key'    => 'L'
2500                         ),
2501                         array(
2502                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
2503                                 'id'     => 'mw-editbutton-extlink',
2504                                 'open'   => '[',
2505                                 'close'  => ']',
2506                                 'sample' => wfMsg( 'extlink_sample' ),
2507                                 'tip'    => wfMsg( 'extlink_tip' ),
2508                                 'key'    => 'X'
2509                         ),
2510                         array(
2511                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
2512                                 'id'     => 'mw-editbutton-headline',
2513                                 'open'   => "\n== ",
2514                                 'close'  => " ==\n",
2515                                 'sample' => wfMsg( 'headline_sample' ),
2516                                 'tip'    => wfMsg( 'headline_tip' ),
2517                                 'key'    => 'H'
2518                         ),
2519                         $imagesAvailable ? array(
2520                                 'image'  => $wgLang->getImageFile( 'button-image' ),
2521                                 'id'     => 'mw-editbutton-image',
2522                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
2523                                 'close'  => ']]',
2524                                 'sample' => wfMsg( 'image_sample' ),
2525                                 'tip'    => wfMsg( 'image_tip' ),
2526                                 'key'    => 'D',
2527                         ) : false,
2528                         $imagesAvailable ? array(
2529                                 'image'  => $wgLang->getImageFile( 'button-media' ),
2530                                 'id'     => 'mw-editbutton-media',
2531                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
2532                                 'close'  => ']]',
2533                                 'sample' => wfMsg( 'media_sample' ),
2534                                 'tip'    => wfMsg( 'media_tip' ),
2535                                 'key'    => 'M'
2536                         ) : false,
2537                         $wgUseTeX ?     array(
2538                                 'image'  => $wgLang->getImageFile( 'button-math' ),
2539                                 'id'     => 'mw-editbutton-math',
2540                                 'open'   => "<math>",
2541                                 'close'  => "</math>",
2542                                 'sample' => wfMsg( 'math_sample' ),
2543                                 'tip'    => wfMsg( 'math_tip' ),
2544                                 'key'    => 'C'
2545                         ) : false,
2546                         array(
2547                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
2548                                 'id'     => 'mw-editbutton-nowiki',
2549                                 'open'   => "<nowiki>",
2550                                 'close'  => "</nowiki>",
2551                                 'sample' => wfMsg( 'nowiki_sample' ),
2552                                 'tip'    => wfMsg( 'nowiki_tip' ),
2553                                 'key'    => 'N'
2554                         ),
2555                         array(
2556                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
2557                                 'id'     => 'mw-editbutton-signature',
2558                                 'open'   => '--~~~~',
2559                                 'close'  => '',
2560                                 'sample' => '',
2561                                 'tip'    => wfMsg( 'sig_tip' ),
2562                                 'key'    => 'Y'
2563                         ),
2564                         array(
2565                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
2566                                 'id'     => 'mw-editbutton-hr',
2567                                 'open'   => "\n----\n",
2568                                 'close'  => '',
2569                                 'sample' => '',
2570                                 'tip'    => wfMsg( 'hr_tip' ),
2571                                 'key'    => 'R'
2572                         )
2573                 );
2574
2575                 $script = '';
2576                 foreach ( $toolarray as $tool ) {
2577                         if ( !$tool ) {
2578                                 continue;
2579                         }
2580
2581                         $params = array(
2582                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
2583                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
2584                                 // Older browsers show a "speedtip" type message only for ALT.
2585                                 // Ideally these should be different, realistically they
2586                                 // probably don't need to be.
2587                                 $tip = $tool['tip'],
2588                                 $open = $tool['open'],
2589                                 $close = $tool['close'],
2590                                 $sample = $tool['sample'],
2591                                 $cssId = $tool['id'],
2592                         );
2593
2594                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
2595                 }
2596                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
2597
2598                 $toolbar = '<div id="toolbar"></div>';
2599
2600                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
2601
2602                 return $toolbar;
2603         }
2604
2605         /**
2606          * Returns an array of html code of the following checkboxes:
2607          * minor and watch
2608          *
2609          * @param $tabindex Current tabindex
2610          * @param $checked Array of checkbox => bool, where bool indicates the checked
2611          *                 status of the checkbox
2612          *
2613          * @return array
2614          */
2615         public function getCheckboxes( &$tabindex, $checked ) {
2616                 global $wgUser;
2617
2618                 $checkboxes = array();
2619
2620                 // don't show the minor edit checkbox if it's a new page or section
2621                 if ( !$this->isNew ) {
2622                         $checkboxes['minor'] = '';
2623                         $minorLabel = wfMsgExt( 'minoredit', array( 'parseinline' ) );
2624                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
2625                                 $attribs = array(
2626                                         'tabindex'  => ++$tabindex,
2627                                         'accesskey' => wfMsg( 'accesskey-minoredit' ),
2628                                         'id'        => 'wpMinoredit',
2629                                 );
2630                                 $checkboxes['minor'] =
2631                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
2632                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
2633                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
2634                                         ">{$minorLabel}</label>";
2635                         }
2636                 }
2637
2638                 $watchLabel = wfMsgExt( 'watchthis', array( 'parseinline' ) );
2639                 $checkboxes['watch'] = '';
2640                 if ( $wgUser->isLoggedIn() ) {
2641                         $attribs = array(
2642                                 'tabindex'  => ++$tabindex,
2643                                 'accesskey' => wfMsg( 'accesskey-watch' ),
2644                                 'id'        => 'wpWatchthis',
2645                         );
2646                         $checkboxes['watch'] =
2647                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
2648                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
2649                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
2650                                 ">{$watchLabel}</label>";
2651                 }
2652                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
2653                 return $checkboxes;
2654         }
2655
2656         /**
2657          * Returns an array of html code of the following buttons:
2658          * save, diff, preview and live
2659          *
2660          * @param $tabindex Current tabindex
2661          *
2662          * @return array
2663          */
2664         public function getEditButtons( &$tabindex ) {
2665                 $buttons = array();
2666
2667                 $temp = array(
2668                         'id'        => 'wpSave',
2669                         'name'      => 'wpSave',
2670                         'type'      => 'submit',
2671                         'tabindex'  => ++$tabindex,
2672                         'value'     => wfMsg( 'savearticle' ),
2673                         'accesskey' => wfMsg( 'accesskey-save' ),
2674                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
2675                 );
2676                 $buttons['save'] = Xml::element('input', $temp, '');
2677
2678                 ++$tabindex; // use the same for preview and live preview
2679                 $temp = array(
2680                         'id'        => 'wpPreview',
2681                         'name'      => 'wpPreview',
2682                         'type'      => 'submit',
2683                         'tabindex'  => $tabindex,
2684                         'value'     => wfMsg( 'showpreview' ),
2685                         'accesskey' => wfMsg( 'accesskey-preview' ),
2686                         'title'     => wfMsg( 'tooltip-preview' ) . ' [' . wfMsg( 'accesskey-preview' ) . ']',
2687                 );
2688                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
2689                 $buttons['live'] = '';
2690
2691                 $temp = array(
2692                         'id'        => 'wpDiff',
2693                         'name'      => 'wpDiff',
2694                         'type'      => 'submit',
2695                         'tabindex'  => ++$tabindex,
2696                         'value'     => wfMsg( 'showdiff' ),
2697                         'accesskey' => wfMsg( 'accesskey-diff' ),
2698                         'title'     => wfMsg( 'tooltip-diff' ) . ' [' . wfMsg( 'accesskey-diff' ) . ']',
2699                 );
2700                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
2701
2702                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
2703                 return $buttons;
2704         }
2705
2706         /**
2707          * Output preview text only. This can be sucked into the edit page
2708          * via JavaScript, and saves the server time rendering the skin as
2709          * well as theoretically being more robust on the client (doesn't
2710          * disturb the edit box's undo history, won't eat your text on
2711          * failure, etc).
2712          *
2713          * @todo This doesn't include category or interlanguage links.
2714          *       Would need to enhance it a bit, <s>maybe wrap them in XML
2715          *       or something...</s> that might also require more skin
2716          *       initialization, so check whether that's a problem.
2717          */
2718         function livePreview() {
2719                 global $wgOut;
2720                 $wgOut->disable();
2721                 header( 'Content-type: text/xml; charset=utf-8' );
2722                 header( 'Cache-control: no-cache' );
2723
2724                 $previewText = $this->getPreviewText();
2725                 #$categories = $skin->getCategoryLinks();
2726
2727                 $s =
2728                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
2729                 Xml::tags( 'livepreview', null,
2730                         Xml::element( 'preview', null, $previewText )
2731                         #.      Xml::element( 'category', null, $categories )
2732                 );
2733                 echo $s;
2734         }
2735
2736         /**
2737          * Call the stock "user is blocked" page
2738          *
2739          * @deprecated in 1.19; throw an exception directly instead
2740          */
2741         function blockedPage() {
2742                 global $wgUser;
2743
2744                 throw new UserBlockedError( $wgUser->mBlock );
2745         }
2746
2747         /**
2748          * Produce the stock "please login to edit pages" page
2749          *
2750          * @deprecated in 1.19; throw an exception directly instead
2751          */
2752         function userNotLoggedInPage() {
2753                 throw new PermissionsError( 'edit' );
2754         }
2755
2756         /**
2757          * Show an error page saying to the user that he has insufficient permissions
2758          * to create a new page
2759          *
2760          * @deprecated in 1.19; throw an exception directly instead
2761          */
2762         function noCreatePermission() {
2763                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
2764                 throw new PermissionsError( $permission );
2765         }
2766
2767         /**
2768          * Creates a basic error page which informs the user that
2769          * they have attempted to edit a nonexistent section.
2770          */
2771         function noSuchSectionPage() {
2772                 global $wgOut;
2773
2774                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
2775
2776                 $res = wfMsgExt( 'nosuchsectiontext', 'parse', $this->section );
2777                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
2778                 $wgOut->addHTML( $res );
2779
2780                 $wgOut->returnToMain( false, $this->mTitle );
2781         }
2782
2783         /**
2784          * Produce the stock "your edit contains spam" page
2785          *
2786          * @param $match Text which triggered one or more filters
2787          * @deprecated since 1.17 Use method spamPageWithContent() instead
2788          */
2789         static function spamPage( $match = false ) {
2790                 global $wgOut, $wgTitle;
2791
2792                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
2793
2794                 $wgOut->addHTML( '<div id="spamprotected">' );
2795                 $wgOut->addWikiMsg( 'spamprotectiontext' );
2796                 if ( $match ) {
2797                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
2798                 }
2799                 $wgOut->addHTML( '</div>' );
2800
2801                 $wgOut->returnToMain( false, $wgTitle );
2802         }
2803
2804         /**
2805          * Show "your edit contains spam" page with your diff and text
2806          *
2807          * @param $match Text which triggered one or more filters
2808          */
2809         public function spamPageWithContent( $match = false ) {
2810                 global $wgOut;
2811                 $this->textbox2 = $this->textbox1;
2812
2813                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
2814
2815                 $wgOut->addHTML( '<div id="spamprotected">' );
2816                 $wgOut->addWikiMsg( 'spamprotectiontext' );
2817                 if ( $match ) {
2818                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
2819                 }
2820                 $wgOut->addHTML( '</div>' );
2821
2822                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2823                 $de = new DifferenceEngine( $this->mArticle->getContext() );
2824                 $de->setText( $this->getContent(), $this->textbox2 );
2825                 $de->showDiff( wfMsg( "storedversion" ), wfMsgExt( 'yourtext', 'parseinline' ) );
2826
2827                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2828                 $this->showTextbox2();
2829
2830                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
2831         }
2832
2833         /**
2834          * Format an anchor fragment as it would appear for a given section name
2835          * @param $text String
2836          * @return String
2837          * @private
2838          */
2839         function sectionAnchor( $text ) {
2840                 global $wgParser;
2841                 return $wgParser->guessSectionNameFromWikiText( $text );
2842         }
2843
2844         /**
2845          * Check if the browser is on a blacklist of user-agents known to
2846          * mangle UTF-8 data on form submission. Returns true if Unicode
2847          * should make it through, false if it's known to be a problem.
2848          * @return bool
2849          * @private
2850          */
2851         function checkUnicodeCompliantBrowser() {
2852                 global $wgBrowserBlackList;
2853                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
2854                         // No User-Agent header sent? Trust it by default...
2855                         return true;
2856                 }
2857                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
2858                 foreach ( $wgBrowserBlackList as $browser ) {
2859                         if ( preg_match($browser, $currentbrowser) ) {
2860                                 return false;
2861                         }
2862                 }
2863                 return true;
2864         }
2865
2866         /**
2867          * Filter an input field through a Unicode de-armoring process if it
2868          * came from an old browser with known broken Unicode editing issues.
2869          *
2870          * @param $request WebRequest
2871          * @param $field String
2872          * @return String
2873          * @private
2874          */
2875         function safeUnicodeInput( $request, $field ) {
2876                 $text = rtrim( $request->getText( $field ) );
2877                 return $request->getBool( 'safemode' )
2878                         ? $this->unmakesafe( $text )
2879                         : $text;
2880         }
2881
2882         /**
2883          * @param $request WebRequest
2884          * @param $text string
2885          * @return string
2886          */
2887         function safeUnicodeText( $request, $text ) {
2888                 $text = rtrim( $text );
2889                 return $request->getBool( 'safemode' )
2890                         ? $this->unmakesafe( $text )
2891                         : $text;
2892         }
2893
2894         /**
2895          * Filter an output field through a Unicode armoring process if it is
2896          * going to an old browser with known broken Unicode editing issues.
2897          *
2898          * @param $text String
2899          * @return String
2900          * @private
2901          */
2902         function safeUnicodeOutput( $text ) {
2903                 global $wgContLang;
2904                 $codedText = $wgContLang->recodeForEdit( $text );
2905                 return $this->checkUnicodeCompliantBrowser()
2906                         ? $codedText
2907                         : $this->makesafe( $codedText );
2908         }
2909
2910         /**
2911          * A number of web browsers are known to corrupt non-ASCII characters
2912          * in a UTF-8 text editing environment. To protect against this,
2913          * detected browsers will be served an armored version of the text,
2914          * with non-ASCII chars converted to numeric HTML character references.
2915          *
2916          * Preexisting such character references will have a 0 added to them
2917          * to ensure that round-trips do not alter the original data.
2918          *
2919          * @param $invalue String
2920          * @return String
2921          * @private
2922          */
2923         function makesafe( $invalue ) {
2924                 // Armor existing references for reversability.
2925                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
2926
2927                 $bytesleft = 0;
2928                 $result = "";
2929                 $working = 0;
2930                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2931                         $bytevalue = ord( $invalue[$i] );
2932                         if ( $bytevalue <= 0x7F ) { //0xxx xxxx
2933                                 $result .= chr( $bytevalue );
2934                                 $bytesleft = 0;
2935                         } elseif ( $bytevalue <= 0xBF ) { //10xx xxxx
2936                                 $working = $working << 6;
2937                                 $working += ($bytevalue & 0x3F);
2938                                 $bytesleft--;
2939                                 if ( $bytesleft <= 0 ) {
2940                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
2941                                 }
2942                         } elseif ( $bytevalue <= 0xDF ) { //110x xxxx
2943                                 $working = $bytevalue & 0x1F;
2944                                 $bytesleft = 1;
2945                         } elseif ( $bytevalue <= 0xEF ) { //1110 xxxx
2946                                 $working = $bytevalue & 0x0F;
2947                                 $bytesleft = 2;
2948                         } else { //1111 0xxx
2949                                 $working = $bytevalue & 0x07;
2950                                 $bytesleft = 3;
2951                         }
2952                 }
2953                 return $result;
2954         }
2955
2956         /**
2957          * Reverse the previously applied transliteration of non-ASCII characters
2958          * back to UTF-8. Used to protect data from corruption by broken web browsers
2959          * as listed in $wgBrowserBlackList.
2960          *
2961          * @param $invalue String
2962          * @return String
2963          * @private
2964          */
2965         function unmakesafe( $invalue ) {
2966                 $result = "";
2967                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2968                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i+3] != '0' ) ) {
2969                                 $i += 3;
2970                                 $hexstring = "";
2971                                 do {
2972                                         $hexstring .= $invalue[$i];
2973                                         $i++;
2974                                 } while( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
2975
2976                                 // Do some sanity checks. These aren't needed for reversability,
2977                                 // but should help keep the breakage down if the editor
2978                                 // breaks one of the entities whilst editing.
2979                                 if ( (substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6) ) {
2980                                         $codepoint = hexdec($hexstring);
2981                                         $result .= codepointToUtf8( $codepoint );
2982                                 } else {
2983                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
2984                                 }
2985                         } else {
2986                                 $result .= substr( $invalue, $i, 1 );
2987                         }
2988                 }
2989                 // reverse the transform that we made for reversability reasons.
2990                 return strtr( $result, array( "&#x0" => "&#x" ) );
2991         }
2992 }