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