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  * $wgTitle 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 class EditPage {
  20         const AS_SUCCESS_UPDATE                 = 200;
  21         const AS_SUCCESS_NEW_ARTICLE            = 201;
  22         const AS_HOOK_ERROR                     = 210;
  23         const AS_FILTERING                      = 211;
  24         const AS_HOOK_ERROR_EXPECTED            = 212;
  25         const AS_BLOCKED_PAGE_FOR_USER          = 215;
  26         const AS_CONTENT_TOO_BIG                = 216;
  27         const AS_USER_CANNOT_EDIT               = 217;
  28         const AS_READ_ONLY_PAGE_ANON            = 218;
  29         const AS_READ_ONLY_PAGE_LOGGED          = 219;
  30         const AS_READ_ONLY_PAGE                 = 220;
  31         const AS_RATE_LIMITED                   = 221;
  32         const AS_ARTICLE_WAS_DELETED            = 222;
  33         const AS_NO_CREATE_PERMISSION           = 223;
  34         const AS_BLANK_ARTICLE                  = 224;
  35         const AS_CONFLICT_DETECTED              = 225;
  36         const AS_SUMMARY_NEEDED                 = 226;
  37         const AS_TEXTBOX_EMPTY                  = 228;
  38         const AS_MAX_ARTICLE_SIZE_EXCEEDED      = 229;
  39         const AS_OK                             = 230;
  40         const AS_END                            = 231;
  41         const AS_SPAM_ERROR                     = 232;
  42         const AS_IMAGE_REDIRECT_ANON            = 233;
  43         const AS_IMAGE_REDIRECT_LOGGED          = 234;
  44
  45         var $mArticle;
  46         var $mTitle;
  47         var $mMetaData = '';
  48         var $isConflict = false;
  49         var $isCssJsSubpage = false;
  50         var $deletedSinceEdit = false;
  51         var $formtype;
  52         var $firsttime;
  53         var $lastDelete;
  54         var $mTokenOk = false;
  55         var $mTokenOkExceptSuffix = false;
  56         var $mTriedSave = false;
  57         var $tooBig = false;
  58         var $kblength = false;
  59         var $missingComment = false;
  60         var $missingSummary = false;
  61         var $allowBlankSummary = false;
  62         var $autoSumm = '';
  63         var $hookError = '';
  64         var $mPreviewTemplates;
  65         var $mBaseRevision = false;
  66
  67         # Form values
  68         var $save = false, $preview = false, $diff = false;
  69         var $minoredit = false, $watchthis = false, $recreate = false;
  70         var $textbox1 = '', $textbox2 = '', $summary = '';
  71         var $edittime = '', $section = '', $starttime = '';
  72         var $oldid = 0, $editintro = '', $scrolltop = null;
  73
  74         # Placeholders for text injection by hooks (must be HTML)
  75         # extensions should take care to _append_ to the present value
  76         public $editFormPageTop; // Before even the preview
  77         public $editFormTextTop;
  78         public $editFormTextBeforeContent;
  79         public $editFormTextAfterWarn;
  80         public $editFormTextAfterTools;
  81         public $editFormTextBottom;
  82
  83         /* $didSave should be set to true whenever an article was succesfully altered. */
  84         public $didSave = false;
  85
  86         public $suppressIntro = false;
  87
  88         /**
  89          * @todo document
  90          * @param $article
  91          */
  92         function EditPage( $article ) {
  93                 $this->mArticle =& $article;
  94                 $this->mTitle = $article->getTitle();
  95
  96                 # Placeholders for text injection by hooks (empty per default)
  97                 $this->editFormPageTop =
  98                 $this->editFormTextTop =
  99                 $this->editFormTextBeforeContent =
 100                 $this->editFormTextAfterWarn =
 101                 $this->editFormTextAfterTools =
 102                 $this->editFormTextBottom = "";
 103         }
 104
 105         /**
 106          * Fetch initial editing page content.
 107          * @private
 108          */
 109         function getContent( $def_text = '' ) {
 110                 global $wgOut, $wgRequest, $wgParser, $wgMessageCache;
 111
 112                 # Get variables from query string :P
 113                 $section = $wgRequest->getVal( 'section' );
 114                 $preload = $wgRequest->getVal( 'preload' );
 115                 $undoafter = $wgRequest->getVal( 'undoafter' );
 116                 $undo = $wgRequest->getVal( 'undo' );
 117
 118                 wfProfileIn( __METHOD__ );
 119
 120                 $text = '';
 121                 if( !$this->mTitle->exists() ) {
 122                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 123                                 $wgMessageCache->loadAllMessages();
 124                                 # If this is a system message, get the default text.
 125                                 $text = wfMsgWeirdKey ( $this->mTitle->getText() ) ;
 126                         } else {
 127                                 # If requested, preload some text.
 128                                 $text = $this->getPreloadedText( $preload );
 129                         }
 130                         # We used to put MediaWiki:Newarticletext here if
 131                         # $text was empty at this point.
 132                         # This is now shown above the edit box instead.
 133                 } else {
 134                         // FIXME: may be better to use Revision class directly
 135                         // But don't mess with it just yet. Article knows how to
 136                         // fetch the page record from the high-priority server,
 137                         // which is needed to guarantee we don't pick up lagged
 138                         // information.
 139
 140                         $text = $this->mArticle->getContent();
 141
 142                         if ($undo > 0 && $undoafter > 0 && $undo < $undoafter) {
 143                                 # If they got undoafter and undo round the wrong way, switch them
 144                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 145                         }
 146
 147                         if ( $undo > 0 && $undo > $undoafter ) {
 148                                 # Undoing a specific edit overrides section editing; section-editing
 149                                 # doesn't work with undoing.
 150                                 if ( $undoafter ) {
 151                                         $undorev = Revision::newFromId($undo);
 152                                         $oldrev = Revision::newFromId($undoafter);
 153                                 } else {
 154                                         $undorev = Revision::newFromId($undo);
 155                                         $oldrev = $undorev ? $undorev->getPrevious() : null;
 156                                 }
 157
 158                                 # Sanity check, make sure it's the right page,
 159                                 # the revisions exist and they were not deleted.
 160                                 # Otherwise, $text will be left as-is.
 161                                 if( !is_null( $undorev ) && !is_null( $oldrev ) &&
 162                                         $undorev->getPage() == $oldrev->getPage() &&
 163                                         $undorev->getPage() == $this->mArticle->getID() &&
 164                                         !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 165                                         !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 166                                         $undorev_text = $undorev->getText();
 167                                         $oldrev_text = $oldrev->getText();
 168                                         $currev_text = $text;
 169
 170                                         if ( $currev_text != $undorev_text ) {
 171                                                 $result = wfMerge( $undorev_text, $oldrev_text, $currev_text, $text );
 172                                         } else {
 173                                                 # No use doing a merge if it's just a straight revert.
 174                                                 $text = $oldrev_text;
 175                                                 $result = true;
 176                                         }
 177                                         if( $result ) {
 178                                                 # Inform the user of our success and set an automatic edit summary
 179                                                 $this->editFormPageTop .= $wgOut->parse( wfMsgNoTrans( 'undo-success' ) );
 180                                                 $firstrev = $oldrev->getNext();
 181                                                 # If we just undid one rev, use an autosummary
 182                                                 if( $firstrev->mId == $undo ) {
 183                                                         $this->summary = wfMsgForContent('undo-summary', $undo, $undorev->getUserText());
 184                                                 }
 185                                                 $this->formtype = 'diff';
 186                                         } else {
 187                                                 # Warn the user that something went wrong
 188                                                 $this->editFormPageTop .= $wgOut->parse( wfMsgNoTrans( 'undo-failure' ) );
 189                                         }
 190                                 } else {
 191                                         // Failed basic sanity checks.
 192                                         // Older revisions may have been removed since the link
 193                                         // was created, or we may simply have got bogus input.
 194                                         $this->editFormPageTop .= $wgOut->parse( wfMsgNoTrans( 'undo-norev' ) );
 195                                 }
 196                         } else if( $section != '' ) {
 197                                 if( $section == 'new' ) {
 198                                         $text = $this->getPreloadedText( $preload );
 199                                 } else {
 200                                         $text = $wgParser->getSection( $text, $section, $def_text );
 201                                 }
 202                         }
 203                 }
 204
 205                 wfProfileOut( __METHOD__ );
 206                 return $text;
 207         }
 208
 209         /**
 210          * Get the contents of a page from its title and remove includeonly tags
 211          *
 212          * @param $preload String: the title of the page.
 213          * @return string The contents of the page.
 214          */
 215         protected function getPreloadedText($preload) {
 216                 if ( $preload === '' )
 217                         return '';
 218                 else {
 219                         $preloadTitle = Title::newFromText( $preload );
 220                         if ( isset( $preloadTitle ) && $preloadTitle->userCanRead() ) {
 221                                 $rev=Revision::newFromTitle($preloadTitle);
 222                                 if ( is_object( $rev ) ) {
 223                                         $text = $rev->getText();
 224                                         // TODO FIXME: AAAAAAAAAAA, this shouldn't be implementing
 225                                         // its own mini-parser! -ævar
 226                                         $text = preg_replace( '~</?includeonly>~', '', $text );
 227                                         return $text;
 228                                 } else
 229                                         return '';
 230                         }
 231                 }
 232         }
 233
 234         /**
 235          * This is the function that extracts metadata from the article body on the first view.
 236          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
 237          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
 238          */
 239         function extractMetaDataFromArticle () {
 240                 global $wgUseMetadataEdit , $wgMetadataWhitelist , $wgLang ;
 241                 $this->mMetaData = '' ;
 242                 if ( !$wgUseMetadataEdit ) return ;
 243                 if ( $wgMetadataWhitelist == '' ) return ;
 244                 $s = '' ;
 245                 $t = $this->getContent();
 246
 247                 # MISSING : <nowiki> filtering
 248
 249                 # Categories and language links
 250                 $t = explode ( "\n" , $t ) ;
 251                 $catlow = strtolower ( $wgLang->getNsText ( NS_CATEGORY ) ) ;
 252                 $cat = $ll = array() ;
 253                 foreach ( $t AS $key => $x )
 254                 {
 255                         $y = trim ( strtolower ( $x ) ) ;
 256                         while ( substr ( $y , 0 , 2 ) == '[[' )
 257                         {
 258                                 $y = explode ( ']]' , trim ( $x ) ) ;
 259                                 $first = array_shift ( $y ) ;
 260                                 $first = explode ( ':' , $first ) ;
 261                                 $ns = array_shift ( $first ) ;
 262                                 $ns = trim ( str_replace ( '[' , '' , $ns ) ) ;
 263                                 if ( strlen ( $ns ) == 2 OR strtolower ( $ns ) == $catlow )
 264                                 {
 265                                         $add = '[[' . $ns . ':' . implode ( ':' , $first ) . ']]' ;
 266                                         if ( strtolower ( $ns ) == $catlow ) $cat[] = $add ;
 267                                         else $ll[] = $add ;
 268                                         $x = implode ( ']]' , $y ) ;
 269                                         $t[$key] = $x ;
 270                                         $y = trim ( strtolower ( $x ) ) ;
 271                                 }
 272                         }
 273                 }
 274                 if ( count ( $cat ) ) $s .= implode ( ' ' , $cat ) . "\n" ;
 275                 if ( count ( $ll ) ) $s .= implode ( ' ' , $ll ) . "\n" ;
 276                 $t = implode ( "\n" , $t ) ;
 277
 278                 # Load whitelist
 279                 $sat = array () ; # stand-alone-templates; must be lowercase
 280                 $wl_title = Title::newFromText ( $wgMetadataWhitelist ) ;
 281                 $wl_article = new Article ( $wl_title ) ;
 282                 $wl = explode ( "\n" , $wl_article->getContent() ) ;
 283                 foreach ( $wl AS $x )
 284                 {
 285                         $isentry = false ;
 286                         $x = trim ( $x ) ;
 287                         while ( substr ( $x , 0 , 1 ) == '*' )
 288                         {
 289                                 $isentry = true ;
 290                                 $x = trim ( substr ( $x , 1 ) ) ;
 291                         }
 292                         if ( $isentry )
 293                         {
 294                                 $sat[] = strtolower ( $x ) ;
 295                         }
 296
 297                 }
 298
 299                 # Templates, but only some
 300                 $t = explode ( '{{' , $t ) ;
 301                 $tl = array () ;
 302                 foreach ( $t AS $key => $x )
 303                 {
 304                         $y = explode ( '}}' , $x , 2 ) ;
 305                         if ( count ( $y ) == 2 )
 306                         {
 307                                 $z = $y[0] ;
 308                                 $z = explode ( '|' , $z ) ;
 309                                 $tn = array_shift ( $z ) ;
 310                                 if ( in_array ( strtolower ( $tn ) , $sat ) )
 311                                 {
 312                                         $tl[] = '{{' . $y[0] . '}}' ;
 313                                         $t[$key] = $y[1] ;
 314                                         $y = explode ( '}}' , $y[1] , 2 ) ;
 315                                 }
 316                                 else $t[$key] = '{{' . $x ;
 317                         }
 318                         else if ( $key != 0 ) $t[$key] = '{{' . $x ;
 319                         else $t[$key] = $x ;
 320                 }
 321                 if ( count ( $tl ) ) $s .= implode ( ' ' , $tl ) ;
 322                 $t = implode ( '' , $t ) ;
 323
 324                 $t = str_replace ( "\n\n\n" , "\n" , $t ) ;
 325                 $this->mArticle->mContent = $t ;
 326                 $this->mMetaData = $s ;
 327         }
 328
 329         protected function wasDeletedSinceLastEdit() {
 330                 /* Note that we rely on the logging table, which hasn't been always there,
 331                  * but that doesn't matter, because this only applies to brand new
 332                  * deletes.
 333                  */
 334                 if ( $this->deletedSinceEdit )
 335                         return true;
 336                 if ( $this->mTitle->isDeleted() ) {
 337                         $this->lastDelete = $this->getLastDelete();
 338                         if ( !is_null($this->lastDelete) ) {
 339                                 $deletetime = $this->lastDelete->log_timestamp;
 340                                 if ( ($deletetime - $this->starttime) > 0 ) {
 341                                         $this->deletedSinceEdit = true;
 342                                 }
 343                         }
 344                 }
 345                 return $this->deletedSinceEdit;
 346         }
 347
 348         function submit() {
 349                 $this->edit();
 350         }
 351
 352         /**
 353          * This is the function that gets called for "action=edit". It
 354          * sets up various member variables, then passes execution to
 355          * another function, usually showEditForm()
 356          *
 357          * The edit form is self-submitting, so that when things like
 358          * preview and edit conflicts occur, we get the same form back
 359          * with the extra stuff added.  Only when the final submission
 360          * is made and all is well do we actually save and redirect to
 361          * the newly-edited page.
 362          */
 363         function edit() {
 364                 global $wgOut, $wgUser, $wgRequest;
 365
 366                 if ( !wfRunHooks( 'AlternateEdit', array( &$this ) ) )
 367                         return;
 368
 369                 wfProfileIn( __METHOD__ );
 370                 wfDebug( __METHOD__.": enter\n" );
 371
 372                 // this is not an article
 373                 $wgOut->setArticleFlag(false);
 374
 375                 $this->importFormData( $wgRequest );
 376                 $this->firsttime = false;
 377
 378                 if( $this->live ) {
 379                         $this->livePreview();
 380                         wfProfileOut( __METHOD__ );
 381                         return;
 382                 }
 383
 384                 $wgOut->addScriptFile( 'edit.js' );
 385
 386                 if( wfReadOnly() ) {
 387                         $this->readOnlyPage( $this->getContent() );
 388                         wfProfileOut( __METHOD__ );
 389                         return;
 390                 }
 391
 392                 $permErrors = $this->mTitle->getUserPermissionsErrors('edit', $wgUser);
 393
 394                 if( !$this->mTitle->exists() ) {
 395                         $permErrors = array_merge( $permErrors,
 396                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors('create', $wgUser), $permErrors ) );
 397                 }
 398
 399                 # Ignore some permissions errors.
 400                 $remove = array();
 401                 foreach( $permErrors as $error ) {
 402                         if ( ( $this->preview || $this->diff ) &&
 403                                 ($error[0] == 'blockedtext' || $error[0] == 'autoblockedtext'))
 404                         {
 405                                 // Don't worry about blocks when previewing/diffing
 406                                 $remove[] = $error;
 407                         }
 408
 409                         if ($error[0] == 'readonlytext')
 410                         {
 411                                 if ($this->edit) {
 412                                         $this->formtype = 'preview';
 413                                 } elseif ($this->save || $this->preview || $this->diff) {
 414                                         $remove[] = $error;
 415                                 }
 416                         }
 417                 }
 418                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 419
 420                 if ( $permErrors ) {
 421                         wfDebug( __METHOD__.": User can't edit\n" );
 422                         $this->readOnlyPage( $this->getContent(), true, $permErrors, 'edit' );
 423                         wfProfileOut( __METHOD__ );
 424                         return;
 425                 } else {
 426                         if ( $this->save ) {
 427                                 $this->formtype = 'save';
 428                         } else if ( $this->preview ) {
 429                                 $this->formtype = 'preview';
 430                         } else if ( $this->diff ) {
 431                                 $this->formtype = 'diff';
 432                         } else { # First time through
 433                                 $this->firsttime = true;
 434                                 if( $this->previewOnOpen() ) {
 435                                         $this->formtype = 'preview';
 436                                 } else {
 437                                         $this->extractMetaDataFromArticle () ;
 438                                         $this->formtype = 'initial';
 439                                 }
 440                         }
 441                 }
 442
 443                 wfProfileIn( __METHOD__."-business-end" );
 444
 445                 $this->isConflict = false;
 446                 // css / js subpages of user pages get a special treatment
 447                 $this->isCssJsSubpage      = $this->mTitle->isCssJsSubpage();
 448                 $this->isValidCssJsSubpage = $this->mTitle->isValidCssJsSubpage();
 449
 450                 # Show applicable editing introductions
 451                 if( $this->formtype == 'initial' || $this->firsttime )
 452                         $this->showIntro();
 453
 454                 if( $this->mTitle->isTalkPage() ) {
 455                         $wgOut->addWikiMsg( 'talkpagetext' );
 456                 }
 457
 458                 # Optional notices on a per-namespace and per-page basis
 459                 $editnotice_ns   = 'editnotice-'.$this->mTitle->getNamespace();
 460                 $editnotice_page = $editnotice_ns.'-'.$this->mTitle->getDBkey();
 461                 if ( !wfEmptyMsg( $editnotice_ns, wfMsgForContent( $editnotice_ns ) ) ) {
 462                         $wgOut->addWikiText( wfMsgForContent( $editnotice_ns )  );
 463                 }
 464                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
 465                         $parts = explode( '/', $this->mTitle->getDBkey() );
 466                         $editnotice_base = $editnotice_ns;
 467                         while ( count( $parts ) > 0 ) {
 468                                 $editnotice_base .= '-'.array_shift( $parts );
 469                                 if ( !wfEmptyMsg( $editnotice_base, wfMsgForContent( $editnotice_base ) ) ) {
 470                                         $wgOut->addWikiText( wfMsgForContent( $editnotice_base )  );
 471                                 }
 472                         }
 473                 } else if ( !wfEmptyMsg( $editnotice_page, wfMsgForContent( $editnotice_page ) ) ) {
 474                         $wgOut->addWikiText( wfMsgForContent( $editnotice_page ) );
 475                 }
 476
 477                 # Attempt submission here.  This will check for edit conflicts,
 478                 # and redundantly check for locked database, blocked IPs, etc.
 479                 # that edit() already checked just in case someone tries to sneak
 480                 # in the back door with a hand-edited submission URL.
 481
 482                 if ( 'save' == $this->formtype ) {
 483                         if ( !$this->attemptSave() ) {
 484                                 wfProfileOut( __METHOD__."-business-end" );
 485                                 wfProfileOut( __METHOD__ );
 486                                 return;
 487                         }
 488                 }
 489
 490                 # First time through: get contents, set time for conflict
 491                 # checking, etc.
 492                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 493                         if ($this->initialiseForm() === false) {
 494                                 $this->noSuchSectionPage();
 495                                 wfProfileOut( __METHOD__."-business-end" );
 496                                 wfProfileOut( __METHOD__ );
 497                                 return;
 498                         }
 499                         if( !$this->mTitle->getArticleId() )
 500                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 501                 }
 502
 503                 $this->showEditForm();
 504                 wfProfileOut( __METHOD__."-business-end" );
 505                 wfProfileOut( __METHOD__ );
 506         }
 507
 508         /**
 509          * Show a read-only error
 510          * Parameters are the same as OutputPage:readOnlyPage()
 511          * Redirect to the article page if redlink=1
 512          */
 513         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 514                 global $wgRequest, $wgOut;
 515                 if ( $wgRequest->getBool( 'redlink' ) ) {
 516                         // The edit page was reached via a red link.
 517                         // Redirect to the article page and let them click the edit tab if
 518                         // they really want a permission error.
 519                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 520                 } else {
 521                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 522                 }
 523         }
 524
 525         /**
 526          * Should we show a preview when the edit form is first shown?
 527          *
 528          * @return bool
 529          */
 530         protected function previewOnOpen() {
 531                 global $wgRequest, $wgUser;
 532                 if( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 533                         // Explicit override from request
 534                         return true;
 535                 } elseif( $wgRequest->getVal( 'preview' ) == 'no' ) {
 536                         // Explicit override from request
 537                         return false;
 538                 } elseif( $this->section == 'new' ) {
 539                         // Nothing *to* preview for new sections
 540                         return false;
 541                 } elseif( ( $wgRequest->getVal( 'preload' ) !== '' || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 542                         // Standard preference behaviour
 543                         return true;
 544                 } elseif( !$this->mTitle->exists() && $this->mTitle->getNamespace() == NS_CATEGORY ) {
 545                         // Categories are special
 546                         return true;
 547                 } else {
 548                         return false;
 549                 }
 550         }
 551
 552         /**
 553          * @todo document
 554          * @param $request
 555          */
 556         function importFormData( &$request ) {
 557                 global $wgLang, $wgUser;
 558                 $fname = 'EditPage::importFormData';
 559                 wfProfileIn( $fname );
 560
 561                 # Section edit can come from either the form or a link
 562                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 563
 564                 if( $request->wasPosted() ) {
 565                         # These fields need to be checked for encoding.
 566                         # Also remove trailing whitespace, but don't remove _initial_
 567                         # whitespace from the text boxes. This may be significant formatting.
 568                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 569                         $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
 570                         $this->mMetaData = rtrim( $request->getText( 'metadata' ) );
 571                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 572                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary'  ), 250 );
 573
 574                         # Remove extra headings from summaries and new sections.
 575                         $this->summary = preg_replace('/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary);
 576
 577                         $this->edittime = $request->getVal( 'wpEdittime' );
 578                         $this->starttime = $request->getVal( 'wpStarttime' );
 579
 580                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 581
 582                         if( is_null( $this->edittime ) ) {
 583                                 # If the form is incomplete, force to preview.
 584                                 wfDebug( "$fname: Form data appears to be incomplete\n" );
 585                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 586                                 $this->preview  = true;
 587                         } else {
 588                                 /* Fallback for live preview */
 589                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 590                                 $this->diff = $request->getCheck( 'wpDiff' );
 591
 592                                 // Remember whether a save was requested, so we can indicate
 593                                 // if we forced preview due to session failure.
 594                                 $this->mTriedSave = !$this->preview;
 595
 596                                 if ( $this->tokenOk( $request ) ) {
 597                                         # Some browsers will not report any submit button
 598                                         # if the user hits enter in the comment box.
 599                                         # The unmarked state will be assumed to be a save,
 600                                         # if the form seems otherwise complete.
 601                                         wfDebug( "$fname: Passed token check.\n" );
 602                                 } else if ( $this->diff ) {
 603                                         # Failed token check, but only requested "Show Changes".
 604                                         wfDebug( "$fname: Failed token check; Show Changes requested.\n" );
 605                                 } else {
 606                                         # Page might be a hack attempt posted from
 607                                         # an external site. Preview instead of saving.
 608                                         wfDebug( "$fname: Failed token check; forcing preview\n" );
 609                                         $this->preview = true;
 610                                 }
 611                         }
 612                         $this->save = !$this->preview && !$this->diff;
 613                         if( !preg_match( '/^\d{14}$/', $this->edittime )) {
 614                                 $this->edittime = null;
 615                         }
 616
 617                         if( !preg_match( '/^\d{14}$/', $this->starttime )) {
 618                                 $this->starttime = null;
 619                         }
 620
 621                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 622
 623                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 624                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 625
 626                         # Don't force edit summaries when a user is editing their own user or talk page
 627                         if( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) && $this->mTitle->getText() == $wgUser->getName() ) {
 628                                 $this->allowBlankSummary = true;
 629                         } else {
 630                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' );
 631                         }
 632
 633                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 634                 } else {
 635                         # Not a posted form? Start with nothing.
 636                         wfDebug( "$fname: Not a posted form.\n" );
 637                         $this->textbox1  = '';
 638                         $this->textbox2  = '';
 639                         $this->mMetaData = '';
 640                         $this->summary   = '';
 641                         $this->edittime  = '';
 642                         $this->starttime = wfTimestampNow();
 643                         $this->edit      = false;
 644                         $this->preview   = false;
 645                         $this->save      = false;
 646                         $this->diff      = false;
 647                         $this->minoredit = false;
 648                         $this->watchthis = false;
 649                         $this->recreate  = false;
 650
 651                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 652                                 $this->summary = $request->getVal( 'preloadtitle' );
 653                         }
 654                 }
 655
 656                 $this->oldid = $request->getInt( 'oldid' );
 657
 658                 $this->live = $request->getCheck( 'live' );
 659                 $this->editintro = $request->getText( 'editintro' );
 660
 661                 wfProfileOut( $fname );
 662         }
 663
 664         /**
 665          * Make sure the form isn't faking a user's credentials.
 666          *
 667          * @param $request WebRequest
 668          * @return bool
 669          * @private
 670          */
 671         function tokenOk( &$request ) {
 672                 global $wgUser;
 673                 $token = $request->getVal( 'wpEditToken' );
 674                 $this->mTokenOk = $wgUser->matchEditToken( $token );
 675                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
 676                 return $this->mTokenOk;
 677         }
 678
 679         /**
 680          * Show all applicable editing introductions
 681          */
 682         protected function showIntro() {
 683                 global $wgOut, $wgUser;
 684                 if( $this->suppressIntro )
 685                         return;
 686
 687                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exists
 688                 if( $this->mTitle->getNamespace() == NS_USER || $this->mTitle->getNamespace() == NS_USER_TALK ) {
 689                         $parts = explode( '/', $this->mTitle->getText(), 2 );
 690                         $username = $parts[0];
 691                         $id = User::idFromName( $username );
 692                         $ip = User::isIP( $username );
 693
 694                         if ( $id == 0 && !$ip ) {
 695                                 $wgOut->wrapWikiMsg( '<div class="mw-userpage-userdoesnotexist error">$1</div>',
 696                                         array( 'userpage-userdoesnotexist', $username ) );
 697                         }
 698                 }
 699
 700                 if( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
 701                         if( $wgUser->isLoggedIn() ) {
 702                                 $wgOut->wrapWikiMsg( '<div class="mw-newarticletext">$1</div>', 'newarticletext' );
 703                         } else {
 704                                 $wgOut->wrapWikiMsg( '<div class="mw-newarticletextanon">$1</div>', 'newarticletextanon' );
 705                         }
 706                         $this->showDeletionLog( $wgOut );
 707                 }
 708         }
 709
 710         /**
 711          * Attempt to show a custom editing introduction, if supplied
 712          *
 713          * @return bool
 714          */
 715         protected function showCustomIntro() {
 716                 if( $this->editintro ) {
 717                         $title = Title::newFromText( $this->editintro );
 718                         if( $title instanceof Title && $title->exists() && $title->userCanRead() ) {
 719                                 global $wgOut;
 720                                 $revision = Revision::newFromTitle( $title );
 721                                 $wgOut->addWikiTextTitleTidy( $revision->getText(), $this->mTitle );
 722                                 return true;
 723                         } else {
 724                                 return false;
 725                         }
 726                 } else {
 727                         return false;
 728                 }
 729         }
 730
 731         /**
 732          * Attempt submission (no UI)
 733          * @return one of the constants describing the result
 734          */
 735         function internalAttemptSave( &$result, $bot = false ) {
 736                 global $wgFilterCallback, $wgUser, $wgOut, $wgParser;
 737                 global $wgMaxArticleSize;
 738
 739                 $fname = 'EditPage::attemptSave';
 740                 wfProfileIn( $fname );
 741                 wfProfileIn( "$fname-checks" );
 742
 743                 if( !wfRunHooks( 'EditPage::attemptSave', array( &$this ) ) )
 744                 {
 745                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving" );
 746                         return self::AS_HOOK_ERROR;
 747                 }
 748
 749                 # Check image redirect
 750                 if ( $this->mTitle->getNamespace() == NS_IMAGE &&
 751                         Title::newFromRedirect( $this->textbox1 ) instanceof Title &&
 752                         !$wgUser->isAllowed( 'upload' ) ) {
 753                                 if( $wgUser->isAnon() ) {
 754                                         return self::AS_IMAGE_REDIRECT_ANON;
 755                                 } else {
 756                                         return self::AS_IMAGE_REDIRECT_LOGGED;
 757                                 }
 758                 }
 759
 760                 # Reintegrate metadata
 761                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 762                 $this->mMetaData = '' ;
 763
 764                 # Check for spam
 765                 $match = self::matchSpamRegex( $this->summary );
 766                 if( $match === false ) {
 767                         $match = self::matchSpamRegex( $this->textbox1 );
 768                 }
 769                 if( $match !== false ) {
 770                         $result['spam'] = $match;
 771                         $ip = wfGetIP();
 772                         $pdbk = $this->mTitle->getPrefixedDBkey();
 773                         $match = str_replace( "\n", '', $match );
 774                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
 775                         wfProfileOut( "$fname-checks" );
 776                         wfProfileOut( $fname );
 777                         return self::AS_SPAM_ERROR;
 778                 }
 779                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
 780                         # Error messages or other handling should be performed by the filter function
 781                         wfProfileOut( "$fname-checks" );
 782                         wfProfileOut( $fname );
 783                         return self::AS_FILTERING;
 784                 }
 785                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
 786                         # Error messages etc. could be handled within the hook...
 787                         wfProfileOut( "$fname-checks" );
 788                         wfProfileOut( $fname );
 789                         return self::AS_HOOK_ERROR;
 790                 } elseif( $this->hookError != '' ) {
 791                         # ...or the hook could be expecting us to produce an error
 792                         wfProfileOut( "$fname-checks" );
 793                         wfProfileOut( $fname );
 794                         return self::AS_HOOK_ERROR_EXPECTED;
 795                 }
 796                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 797                         # Check block state against master, thus 'false'.
 798                         wfProfileOut( "$fname-checks" );
 799                         wfProfileOut( $fname );
 800                         return self::AS_BLOCKED_PAGE_FOR_USER;
 801                 }
 802                 $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 803                 if ( $this->kblength > $wgMaxArticleSize ) {
 804                         // Error will be displayed by showEditForm()
 805                         $this->tooBig = true;
 806                         wfProfileOut( "$fname-checks" );
 807                         wfProfileOut( $fname );
 808                         return self::AS_CONTENT_TOO_BIG;
 809                 }
 810
 811                 if ( !$wgUser->isAllowed('edit') ) {
 812                         if ( $wgUser->isAnon() ) {
 813                                 wfProfileOut( "$fname-checks" );
 814                                 wfProfileOut( $fname );
 815                                 return self::AS_READ_ONLY_PAGE_ANON;
 816                         }
 817                         else {
 818                                 wfProfileOut( "$fname-checks" );
 819                                 wfProfileOut( $fname );
 820                                 return self::AS_READ_ONLY_PAGE_LOGGED;
 821                         }
 822                 }
 823
 824                 if ( wfReadOnly() ) {
 825                         wfProfileOut( "$fname-checks" );
 826                         wfProfileOut( $fname );
 827                         return self::AS_READ_ONLY_PAGE;
 828                 }
 829                 if ( $wgUser->pingLimiter() ) {
 830                         wfProfileOut( "$fname-checks" );
 831                         wfProfileOut( $fname );
 832                         return self::AS_RATE_LIMITED;
 833                 }
 834
 835                 # If the article has been deleted while editing, don't save it without
 836                 # confirmation
 837                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
 838                         wfProfileOut( "$fname-checks" );
 839                         wfProfileOut( $fname );
 840                         return self::AS_ARTICLE_WAS_DELETED;
 841                 }
 842
 843                 wfProfileOut( "$fname-checks" );
 844
 845                 # If article is new, insert it.
 846                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 847                 if ( 0 == $aid ) {
 848
 849                         // Late check for create permission, just in case *PARANOIA*
 850                         if ( !$this->mTitle->userCan( 'create' ) ) {
 851                                 wfDebug( "$fname: no create permission\n" );
 852                                 wfProfileOut( $fname );
 853                                 return self::AS_NO_CREATE_PERMISSION;
 854                         }
 855
 856                         # Don't save a new article if it's blank.
 857                         if ( '' == $this->textbox1 ) {
 858                                         wfProfileOut( $fname );
 859                                         return self::AS_BLANK_ARTICLE;
 860                         }
 861
 862                         // Run post-section-merge edit filter
 863                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
 864                                 # Error messages etc. could be handled within the hook...
 865                                 wfProfileOut( $fname );
 866                                 return self::AS_HOOK_ERROR;
 867                         }
 868
 869                         $isComment = ( $this->section == 'new' );
 870
 871                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 872                                 $this->minoredit, $this->watchthis, false, $isComment, $bot);
 873
 874                         wfProfileOut( $fname );
 875                         return self::AS_SUCCESS_NEW_ARTICLE;
 876                 }
 877
 878                 # Article exists. Check for edit conflict.
 879
 880                 $this->mArticle->clear(); # Force reload of dates, etc.
 881                 $this->mArticle->forUpdate( true ); # Lock the article
 882
 883                 wfDebug("timestamp: {$this->mArticle->getTimestamp()}, edittime: {$this->edittime}\n");
 884
 885                 if( $this->mArticle->getTimestamp() != $this->edittime ) {
 886                         $this->isConflict = true;
 887                         if( $this->section == 'new' ) {
 888                                 if( $this->mArticle->getUserText() == $wgUser->getName() &&
 889                                         $this->mArticle->getComment() == $this->summary ) {
 890                                         // Probably a duplicate submission of a new comment.
 891                                         // This can happen when squid resends a request after
 892                                         // a timeout but the first one actually went through.
 893                                         wfDebug( "EditPage::editForm duplicate new section submission; trigger edit conflict!\n" );
 894                                 } else {
 895                                         // New comment; suppress conflict.
 896                                         $this->isConflict = false;
 897                                         wfDebug( "EditPage::editForm conflict suppressed; new section\n" );
 898                                 }
 899                         }
 900                 }
 901                 $userid = $wgUser->getId();
 902
 903                 if ( $this->isConflict) {
 904                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 905                                 $this->mArticle->getTimestamp() . "')\n" );
 906                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime);
 907                 }
 908                 else {
 909                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 910                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary);
 911                 }
 912                 if( is_null( $text ) ) {
 913                         wfDebug( "EditPage::editForm activating conflict; section replace failed.\n" );
 914                         $this->isConflict = true;
 915                         $text = $this->textbox1;
 916                 }
 917
 918                 # Suppress edit conflict with self, except for section edits where merging is required.
 919                 if ( ( $this->section == '' ) && ( 0 != $userid ) && ( $this->mArticle->getUser() == $userid ) ) {
 920                         wfDebug( "EditPage::editForm Suppressing edit conflict, same user.\n" );
 921                         $this->isConflict = false;
 922                 } else {
 923                         # switch from section editing to normal editing in edit conflict
 924                         if($this->isConflict) {
 925                                 # Attempt merge
 926                                 if( $this->mergeChangesInto( $text ) ){
 927                                         // Successful merge! Maybe we should tell the user the good news?
 928                                         $this->isConflict = false;
 929                                         wfDebug( "EditPage::editForm Suppressing edit conflict, successful merge.\n" );
 930                                 } else {
 931                                         $this->section = '';
 932                                         $this->textbox1 = $text;
 933                                         wfDebug( "EditPage::editForm Keeping edit conflict, failed merge.\n" );
 934                                 }
 935                         }
 936                 }
 937
 938                 if ( $this->isConflict ) {
 939                         wfProfileOut( $fname );
 940                         return self::AS_CONFLICT_DETECTED;
 941                 }
 942
 943                 $oldtext = $this->mArticle->getContent();
 944
 945                 // Run post-section-merge edit filter
 946                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$this->hookError, $this->summary ) ) ) {
 947                         # Error messages etc. could be handled within the hook...
 948                         wfProfileOut( $fname );
 949                         return self::AS_HOOK_ERROR;
 950                 }
 951
 952                 # Handle the user preference to force summaries here, but not for null edits
 953                 if( $this->section != 'new' && !$this->allowBlankSummary &&  $wgUser->getOption( 'forceeditsummary') &&
 954                         0 != strcmp($oldtext, $text) &&
 955                         !is_object( Title::newFromRedirect( $text ) ) # check if it's not a redirect
 956                 ) {
 957
 958                         if( md5( $this->summary ) == $this->autoSumm ) {
 959                                 $this->missingSummary = true;
 960                                 wfProfileOut( $fname );
 961                                 return self::AS_SUMMARY_NEEDED;
 962                         }
 963                 }
 964
 965                 # And a similar thing for new sections
 966                 if( $this->section == 'new' && !$this->allowBlankSummary && $wgUser->getOption( 'forceeditsummary' ) ) {
 967                         if (trim($this->summary) == '') {
 968                                 $this->missingSummary = true;
 969                                 wfProfileOut( $fname );
 970                                 return self::AS_SUMMARY_NEEDED;
 971                         }
 972                 }
 973
 974                 # All's well
 975                 wfProfileIn( "$fname-sectionanchor" );
 976                 $sectionanchor = '';
 977                 if( $this->section == 'new' ) {
 978                         if ( $this->textbox1 == '' ) {
 979                                 $this->missingComment = true;
 980                                 return self::AS_TEXTBOX_EMPTY;
 981                         }
 982                         if( $this->summary != '' ) {
 983                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $this->summary );
 984                                 # This is a new section, so create a link to the new section
 985                                 # in the revision summary.
 986                                 $cleanSummary = $wgParser->stripSectionName( $this->summary );
 987                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
 988                         }
 989                 } elseif( $this->section != '' ) {
 990                         # Try to get a section anchor from the section source, redirect to edited section if header found
 991                         # XXX: might be better to integrate this into Article::replaceSection
 992                         # for duplicate heading checking and maybe parsing
 993                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 994                         # we can't deal with anchors, includes, html etc in the header for now,
 995                         # headline would need to be parsed to improve this
 996                         if($hasmatch and strlen($matches[2]) > 0) {
 997                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $matches[2] );
 998                         }
 999                 }
1000                 wfProfileOut( "$fname-sectionanchor" );
1001
1002                 // Save errors may fall down to the edit form, but we've now
1003                 // merged the section into full text. Clear the section field
1004                 // so that later submission of conflict forms won't try to
1005                 // replace that into a duplicated mess.
1006                 $this->textbox1 = $text;
1007                 $this->section = '';
1008
1009                 // Check for length errors again now that the section is merged in
1010                 $this->kblength = (int)(strlen( $text ) / 1024);
1011                 if ( $this->kblength > $wgMaxArticleSize ) {
1012                         $this->tooBig = true;
1013                         wfProfileOut( $fname );
1014                         return self::AS_MAX_ARTICLE_SIZE_EXCEEDED;
1015                 }
1016
1017                 # update the article here
1018                 if( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
1019                         $this->watchthis, $bot, $sectionanchor ) ) {
1020                         wfProfileOut( $fname );
1021                         return self::AS_SUCCESS_UPDATE;
1022                 } else {
1023                         $this->isConflict = true;
1024                 }
1025                 wfProfileOut( $fname );
1026                 return self::AS_END;
1027         }
1028
1029         /**
1030          * Check given input text against $wgSpamRegex, and return the text of the first match.
1031          * @return mixed -- matching string or false
1032          */
1033         public static function matchSpamRegex( $text ) {
1034                 global $wgSpamRegex;
1035                 if( $wgSpamRegex ) {
1036                         // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1037                         $regexes = (array)$wgSpamRegex;
1038                         foreach( $regexes as $regex ) {
1039                                 $matches = array();
1040                                 if ( preg_match( $regex, $text, $matches ) ) {
1041                                         return $matches[0];
1042                                 }
1043                         }
1044                 }
1045                 return false;
1046         }
1047
1048         /**
1049          * Initialise form fields in the object
1050          * Called on the first invocation, e.g. when a user clicks an edit link
1051          */
1052         function initialiseForm() {
1053                 $this->edittime = $this->mArticle->getTimestamp();
1054                 $this->textbox1 = $this->getContent(false);
1055                 if ($this->textbox1 === false) return false;
1056
1057                 if ( !$this->mArticle->exists() && $this->mTitle->getNamespace() == NS_MEDIAWIKI )
1058                         $this->textbox1 = wfMsgWeirdKey( $this->mTitle->getText() );
1059                 wfProxyCheck();
1060                 return true;
1061         }
1062
1063         /**
1064          * Send the edit form and related headers to $wgOut
1065          * @param $formCallback Optional callable that takes an OutputPage
1066          *                      parameter; will be called during form output
1067          *                      near the top, for captchas and the like.
1068          */
1069         function showEditForm( $formCallback=null ) {
1070                 global $wgOut, $wgUser, $wgLang, $wgContLang, $wgMaxArticleSize, $wgTitle;
1071
1072                 # If $wgTitle is null, that means we're in API mode.
1073                 # Some hook probably called this function  without checking
1074                 # for is_null($wgTitle) first. Bail out right here so we don't
1075                 # do lots of work just to discard it right after.
1076                 if(is_null($wgTitle))
1077                         return;
1078
1079                 $fname = 'EditPage::showEditForm';
1080                 wfProfileIn( $fname );
1081
1082                 $sk = $wgUser->getSkin();
1083
1084                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) ) ;
1085
1086                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1087
1088                 # Enabled article-related sidebar, toplinks, etc.
1089                 $wgOut->setArticleRelated( true );
1090
1091                 if ( $this->formtype == 'preview' ) {
1092                         $wgOut->setPageTitleActionText( wfMsg( 'preview' ) );
1093                 }
1094
1095                 if ( $this->isConflict ) {
1096                         $s = wfMsg( 'editconflict', $wgTitle->getPrefixedText() );
1097                         $wgOut->setPageTitle( $s );
1098                         $wgOut->addWikiMsg( 'explainconflict' );
1099
1100                         $this->textbox2 = $this->textbox1;
1101                         $this->textbox1 = $this->getContent();
1102                         $this->edittime = $this->mArticle->getTimestamp();
1103                 } else {
1104                         if( $this->section != '' ) {
1105                                 if( $this->section == 'new' ) {
1106                                         $s = wfMsg('editingcomment', $wgTitle->getPrefixedText() );
1107                                 } else {
1108                                         $s = wfMsg('editingsection', $wgTitle->getPrefixedText() );
1109                                         $matches = array();
1110                                         if( !$this->summary && !$this->preview && !$this->diff ) {
1111                                                 preg_match( "/^(=+)(.+)\\1/mi",
1112                                                         $this->textbox1,
1113                                                         $matches );
1114                                                 if( !empty( $matches[2] ) ) {
1115                                                         global $wgParser;
1116                                                         $this->summary = "/* " .
1117                                                                 $wgParser->stripSectionName(trim($matches[2])) .
1118                                                                 " */ ";
1119                                                 }
1120                                         }
1121                                 }
1122                         } else {
1123                                 $s = wfMsg( 'editing', $wgTitle->getPrefixedText() );
1124                         }
1125                         $wgOut->setPageTitle( $s );
1126
1127                         if ( $this->missingComment ) {
1128                                 $wgOut->wrapWikiMsg( '<div id="mw-missingcommenttext">$1</div>',  'missingcommenttext' );
1129                         }
1130
1131                         if( $this->missingSummary && $this->section != 'new' ) {
1132                                 $wgOut->wrapWikiMsg( '<div id="mw-missingsummary">$1</div>', 'missingsummary' );
1133                         }
1134
1135                         if( $this->missingSummary && $this->section == 'new' ) {
1136                                 $wgOut->wrapWikiMsg( '<div id="mw-missingcommentheader">$1</div>', 'missingcommentheader' );
1137                         }
1138
1139                         if( $this->hookError !== '' ) {
1140                                 $wgOut->addWikiText( $this->hookError );
1141                         }
1142
1143                         if ( !$this->checkUnicodeCompliantBrowser() ) {
1144                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
1145                         }
1146                         if ( isset( $this->mArticle ) && isset( $this->mArticle->mRevision ) ) {
1147                         // Let sysop know that this will make private content public if saved
1148
1149                                 if( !$this->mArticle->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1150                                         $wgOut->addWikiMsg( 'rev-deleted-text-permission' );
1151                                 } else if( $this->mArticle->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1152                                         $wgOut->addWikiMsg( 'rev-deleted-text-view' );
1153                                 }
1154
1155                                 if( !$this->mArticle->mRevision->isCurrent() ) {
1156                                         $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
1157                                         $wgOut->addWikiMsg( 'editingold' );
1158                                 }
1159                         }
1160                 }
1161
1162                 if( wfReadOnly() ) {
1163                         $wgOut->addHTML( '<div id="mw-read-only-warning">'.wfMsgWikiHTML( 'readonlywarning' ).'</div>' );
1164                 } elseif( $wgUser->isAnon() && $this->formtype != 'preview' ) {
1165                         $wgOut->addHTML( '<div id="mw-anon-edit-warning">'.wfMsgWikiHTML( 'anoneditwarning' ).'</div>' );
1166                 } else {
1167                         if( $this->isCssJsSubpage && $this->formtype != 'preview' ) {
1168                                 # Check the skin exists
1169                                 if( $this->isValidCssJsSubpage ) {
1170                                         $wgOut->addWikiMsg( 'usercssjsyoucanpreview' );
1171                                 } else {
1172                                         $wgOut->addWikiMsg( 'userinvalidcssjstitle', $wgTitle->getSkinFromCssJsSubpage() );
1173                                 }
1174                         }
1175                 }
1176
1177                 if( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1178                         # Show a warning if editing an interface message
1179                         $wgOut->addWikiMsg( 'editinginterface' );
1180                 } elseif( $this->mTitle->isProtected( 'edit' ) ) {
1181                         # Is the title semi-protected?
1182                         if( $this->mTitle->isSemiProtected() ) {
1183                                 $noticeMsg = 'semiprotectedpagewarning';
1184                         } else {
1185                                 # Then it must be protected based on static groups (regular)
1186                                 $noticeMsg = 'protectedpagewarning';
1187                         }
1188                         $wgOut->addHTML( "<div id='mw-edit-$noticeMsg'>\n" );
1189                         $wgOut->addWikiMsg( $noticeMsg );
1190                         $wgOut->addHTML( "</div>\n" );
1191                 }
1192                 if ( $this->mTitle->isCascadeProtected() ) {
1193                         # Is this page under cascading protection from some source pages?
1194                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
1195                         $notice = "$1\n";
1196                         if ( count($cascadeSources) > 0 ) {
1197                                 # Explain, and list the titles responsible
1198                                 foreach( $cascadeSources as $page ) {
1199                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
1200                                 }
1201                         }
1202                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', count($cascadeSources) ) );
1203                 }
1204                 if( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) != array() ){
1205                         $wgOut->addWikiMsg( 'titleprotectedwarning' );
1206                 }
1207
1208                 if ( $this->kblength === false ) {
1209                         $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
1210                 }
1211                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
1212                         $wgOut->addHTML( "<div id='mw-edit-longpageerror'>\n" );
1213                         $wgOut->addWikiMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) );
1214                         $wgOut->addHTML( "</div>\n" );
1215                 } elseif( $this->kblength > 29 ) {
1216                         $wgOut->addHTML( "<div id='mw-edit-longpagewarning'>\n" );
1217                         $wgOut->addWikiMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) );
1218                         $wgOut->addHTML( "</div>\n" );
1219                 }
1220
1221                 #need to parse the preview early so that we know which templates are used,
1222                 #otherwise users with "show preview after edit box" will get a blank list
1223                 if ( $this->formtype == 'preview' ) {
1224                         $previewOutput = $this->getPreviewText();
1225                 }
1226
1227                 $rows = $wgUser->getIntOption( 'rows' );
1228                 $cols = $wgUser->getIntOption( 'cols' );
1229
1230                 $ew = $wgUser->getOption( 'editwidth' );
1231                 if ( $ew ) $ew = " style=\"width:100%\"";
1232                 else $ew = '';
1233
1234                 $q = 'action=submit';
1235                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
1236                 $action = $wgTitle->escapeLocalURL( $q );
1237
1238                 $colonSep = wfMsg( 'colon-separator' );
1239                 $summary = wfMsg( 'summary' ) . $colonSep;
1240                 $subject = wfMsg( 'subject' ) . $colonSep;
1241
1242                 $cancel = $sk->makeKnownLink( $wgTitle->getPrefixedText(),
1243                                 wfMsgExt('cancel', array('parseinline')) );
1244                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ));
1245                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
1246                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
1247                         htmlspecialchars( wfMsg( 'newwindow' ) );
1248
1249                 global $wgRightsText;
1250                 if ( $wgRightsText ) {
1251                         $copywarnMsg = array( 'copyrightwarning',
1252                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
1253                                 $wgRightsText );
1254                 } else {
1255                         $copywarnMsg = array( 'copyrightwarning2',
1256                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
1257                 }
1258
1259                 if( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
1260                         # prepare toolbar for edit buttons
1261                         $toolbar = EditPage::getEditToolbar();
1262                 } else {
1263                         $toolbar = '';
1264                 }
1265
1266                 // activate checkboxes if user wants them to be always active
1267                 if( !$this->preview && !$this->diff ) {
1268                         # Sort out the "watch" checkbox
1269                         if( $wgUser->getOption( 'watchdefault' ) ) {
1270                                 # Watch all edits
1271                                 $this->watchthis = true;
1272                         } elseif( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1273                                 # Watch creations
1274                                 $this->watchthis = true;
1275                         } elseif( $this->mTitle->userIsWatching() ) {
1276                                 # Already watched
1277                                 $this->watchthis = true;
1278                         }
1279
1280                         if( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
1281                 }
1282
1283                 $wgOut->addHTML( $this->editFormPageTop );
1284
1285                 if ( $wgUser->getOption( 'previewontop' ) ) {
1286
1287                         if ( 'preview' == $this->formtype ) {
1288                                 $this->showPreview( $previewOutput );
1289                         } else {
1290                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
1291                         }
1292
1293                         if ( 'diff' == $this->formtype ) {
1294                                 $this->showDiff();
1295                         }
1296                 }
1297
1298
1299                 $wgOut->addHTML( $this->editFormTextTop );
1300
1301                 # if this is a comment, show a subject line at the top, which is also the edit summary.
1302                 # Otherwise, show a summary field at the bottom
1303                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
1304
1305                 # If a blank edit summary was previously provided, and the appropriate
1306                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1307                 # user being bounced back more than once in the event that a summary
1308                 # is not required.
1309                 #####
1310                 # For a bit more sophisticated detection of blank summaries, hash the
1311                 # automatic one and pass that in the hidden field wpAutoSummary.
1312                 $summaryhiddens =  '';
1313                 if( $this->missingSummary ) $summaryhiddens .= Xml::hidden( 'wpIgnoreBlankSummary', true );
1314                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1315                 $summaryhiddens .= Xml::hidden( 'wpAutoSummary', $autosumm );
1316                 if( $this->section == 'new' ) {
1317                         $commentsubject="<span id='wpSummaryLabel'><label for='wpSummary'>{$subject}</label></span>\n<input tabindex='1' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' />{$summaryhiddens}<br />";
1318                         $editsummary = "<div class='editOptions'>\n";
1319                         global $wgParser;
1320                         $formattedSummary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $this->summary ) );
1321                         $subjectpreview = $summarytext && $this->preview ? "<div class=\"mw-summary-preview\">".wfMsg('subject-preview').$colonSep.$sk->commentBlock( $formattedSummary, $this->mTitle, true )."</div>\n" : '';
1322                         $summarypreview = '';
1323                 } else {
1324                         $commentsubject = '';
1325                         $editsummary="<div class='editOptions'>\n<span id='wpSummaryLabel'><label for='wpSummary'>{$summary}</label></span>\n<input tabindex='2' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' />{$summaryhiddens}<br />";
1326                         $summarypreview = $summarytext && $this->preview ? "<div class=\"mw-summary-preview\">".wfMsg('summary-preview').$colonSep.$sk->commentBlock( $this->summary, $this->mTitle )."</div>\n" : '';
1327                         $subjectpreview = '';
1328                 }
1329
1330                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
1331                 if( !$this->preview && !$this->diff ) {
1332                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
1333                 }
1334                 $templates = ($this->preview || $this->section != '') ? $this->mPreviewTemplates : $this->mArticle->getUsedTemplates();
1335                 $formattedtemplates = $sk->formatTemplates( $templates, $this->preview, $this->section != '');
1336
1337                 $hiddencats = $this->mArticle->getHiddenCategories();
1338                 $formattedhiddencats = $sk->formatHiddenCategories( $hiddencats );
1339
1340                 global $wgUseMetadataEdit ;
1341                 if ( $wgUseMetadataEdit ) {
1342                         $metadata = $this->mMetaData ;
1343                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
1344                         $top = wfMsgWikiHtml( 'metadata_help' );
1345                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
1346                 }
1347                 else $metadata = "" ;
1348
1349                 $hidden = '';
1350                 $recreate = '';
1351                 if ($this->wasDeletedSinceLastEdit()) {
1352                         if ( 'save' != $this->formtype ) {
1353                                 $wgOut->addWikiMsg('deletedwhileediting');
1354                         } else {
1355                                 // Hide the toolbar and edit area, use can click preview to get it back
1356                                 // Add an confirmation checkbox and explanation.
1357                                 $toolbar = '';
1358                                 $hidden = 'type="hidden" style="display:none;"';
1359                                 $recreate = $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ));
1360                                 $recreate .=
1361                                         "<br /><input tabindex='1' type='checkbox' value='1' name='wpRecreate' id='wpRecreate' />".
1362                                         "<label for='wpRecreate' title='".wfMsg('tooltip-recreate')."'>". wfMsg('recreate')."</label>";
1363                         }
1364                 }
1365
1366                 $tabindex = 2;
1367
1368                 $checkboxes = self::getCheckboxes( $tabindex, $sk,
1369                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
1370
1371                 $checkboxhtml = implode( $checkboxes, "\n" );
1372
1373                 $buttons = $this->getEditButtons( $tabindex );
1374                 $buttonshtml = implode( $buttons, "\n" );
1375
1376                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
1377                         ? '' : Xml::hidden( 'safemode', '1' );
1378
1379                 $wgOut->addHTML( <<<END
1380 {$toolbar}
1381 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1382 END
1383 );
1384
1385                 if( is_callable( $formCallback ) ) {
1386                         call_user_func_array( $formCallback, array( &$wgOut ) );
1387                 }
1388
1389                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1390
1391                 // Put these up at the top to ensure they aren't lost on early form submission
1392                 $wgOut->addHTML( "
1393 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
1394 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
1395 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
1396 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
1397
1398                 $encodedtext = htmlspecialchars( $this->safeUnicodeOutput( $this->textbox1 ) );
1399                 if( $encodedtext !== '' ) {
1400                         // Ensure there's a newline at the end, otherwise adding lines
1401                         // is awkward.
1402                         // But don't add a newline if the ext is empty, or Firefox in XHTML
1403                         // mode will show an extra newline. A bit annoying.
1404                         $encodedtext .= "\n";
1405                 }
1406
1407                 $wgOut->addHTML( <<<END
1408 $recreate
1409 {$commentsubject}
1410 {$subjectpreview}
1411 {$this->editFormTextBeforeContent}
1412 <textarea tabindex='1' accesskey="," name="wpTextbox1" id="wpTextbox1" rows='{$rows}'
1413 cols='{$cols}'{$ew} $hidden>{$encodedtext}</textarea>
1414 END
1415 );
1416
1417                 $wgOut->wrapWikiMsg( "<div id=\"editpage-copywarn\">\n$1\n</div>", $copywarnMsg );
1418                 $wgOut->addHTML( $this->editFormTextAfterWarn );
1419                 $wgOut->addHTML( "
1420 {$metadata}
1421 {$editsummary}
1422 {$summarypreview}
1423 {$checkboxhtml}
1424 {$safemodehtml}
1425 ");
1426
1427                 $wgOut->addHTML(
1428 "<div class='editButtons'>
1429 {$buttonshtml}
1430         <span class='editHelp'>{$cancel} | {$edithelp}</span>
1431 </div><!-- editButtons -->
1432 </div><!-- editOptions -->");
1433
1434                 /**
1435                  * To make it harder for someone to slip a user a page
1436                  * which submits an edit form to the wiki without their
1437                  * knowledge, a random token is associated with the login
1438                  * session. If it's not passed back with the submission,
1439                  * we won't save the page, or render user JavaScript and
1440                  * CSS previews.
1441                  *
1442                  * For anon editors, who may not have a session, we just
1443                  * include the constant suffix to prevent editing from
1444                  * broken text-mangling proxies.
1445                  */
1446                 $token = htmlspecialchars( $wgUser->editToken() );
1447                 $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
1448
1449                 $wgOut->addHtml( '<div class="mw-editTools">' );
1450                 $wgOut->addWikiMsgArray( 'edittools', array(), array( 'content' ) );
1451                 $wgOut->addHtml( '</div>' );
1452
1453                 $wgOut->addHTML( $this->editFormTextAfterTools );
1454
1455                 $wgOut->addHTML( "
1456 <div class='templatesUsed'>
1457 {$formattedtemplates}
1458 </div>
1459 <div class='hiddencats'>
1460 {$formattedhiddencats}
1461 </div>
1462 ");
1463
1464                 if ( $this->isConflict && wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
1465                         $wgOut->wrapWikiMsg( '==$1==', "yourdiff" );
1466
1467                         $de = new DifferenceEngine( $this->mTitle );
1468                         $de->setText( $this->textbox2, $this->textbox1 );
1469                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1470
1471                         $wgOut->wrapWikiMsg( '==$1==', "yourtext" );
1472                         $wgOut->addHTML( "<textarea tabindex='6' id='wpTextbox2' name=\"wpTextbox2\" rows='{$rows}' cols='{$cols}'>"
1473                                 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox2 ) ) . "\n</textarea>" );
1474                 }
1475                 $wgOut->addHTML( $this->editFormTextBottom );
1476                 $wgOut->addHTML( "</form>\n" );
1477                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1478
1479                         if ( $this->formtype == 'preview') {
1480                                 $this->showPreview( $previewOutput );
1481                         } else {
1482                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
1483                         }
1484
1485                         if ( $this->formtype == 'diff') {
1486                                 $this->showDiff();
1487                         }
1488
1489                 }
1490
1491                 wfProfileOut( $fname );
1492         }
1493
1494         /**
1495          * Append preview output to $wgOut.
1496          * Includes category rendering if this is a category page.
1497          *
1498          * @param string $text The HTML to be output for the preview.
1499          */
1500         protected function showPreview( $text ) {
1501                 global $wgOut;
1502
1503                 $wgOut->addHTML( '<div id="wikiPreview">' );
1504                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1505                         $this->mArticle->openShowCategory();
1506                 }
1507                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
1508                 $wgOut->addHTML( $text );
1509                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1510                         $this->mArticle->closeShowCategory();
1511                 }
1512                 $wgOut->addHTML( '</div>' );
1513         }
1514
1515         /**
1516          * Live Preview lets us fetch rendered preview page content and
1517          * add it to the page without refreshing the whole page.
1518          * If not supported by the browser it will fall through to the normal form
1519          * submission method.
1520          *
1521          * This function outputs a script tag to support live preview, and
1522          * returns an onclick handler which should be added to the attributes
1523          * of the preview button
1524          */
1525         function doLivePreviewScript() {
1526                 global $wgOut, $wgTitle;
1527                 $wgOut->addScriptFile( 'preview.js' );
1528                 $liveAction = $wgTitle->getLocalUrl( 'action=submit&wpPreview=true&live=true' );
1529                 return "return !lpDoPreview(" .
1530                         "editform.wpTextbox1.value," .
1531                         '"' . $liveAction . '"' . ")";
1532         }
1533
1534         function getLastDelete() {
1535                 $dbr = wfGetDB( DB_SLAVE );
1536                 $fname = 'EditPage::getLastDelete';
1537                 $res = $dbr->select(
1538                         array( 'logging', 'user' ),
1539                         array( 'log_type',
1540                                'log_action',
1541                                'log_timestamp',
1542                                'log_user',
1543                                'log_namespace',
1544                                'log_title',
1545                                'log_comment',
1546                                'log_params',
1547                                'user_name', ),
1548                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1549                                'log_title' => $this->mTitle->getDBkey(),
1550                                'log_type' => 'delete',
1551                                'log_action' => 'delete',
1552                                'user_id=log_user' ),
1553                         $fname,
1554                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
1555
1556                 if($dbr->numRows($res) == 1) {
1557                         while ( $x = $dbr->fetchObject ( $res ) )
1558                                 $data = $x;
1559                         $dbr->freeResult ( $res ) ;
1560                 } else {
1561                         $data = null;
1562                 }
1563                 return $data;
1564         }
1565
1566         /**
1567          * Get the rendered text for previewing.
1568          * @return string
1569          */
1570         function getPreviewText() {
1571                 global $wgOut, $wgUser, $wgTitle, $wgParser, $wgLang, $wgContLang;
1572
1573                 $fname = 'EditPage::getPreviewText';
1574                 wfProfileIn( $fname );
1575
1576                 if ( $this->mTriedSave && !$this->mTokenOk ) {
1577                         if ( $this->mTokenOkExceptSuffix ) {
1578                                 $note = wfMsg( 'token_suffix_mismatch' );
1579                         } else {
1580                                 $note = wfMsg( 'session_fail_preview' );
1581                         }
1582                 } else {
1583                         $note = wfMsg( 'previewnote' );
1584                 }
1585
1586                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1587                 $parserOptions->setEditSection( false );
1588
1589                 global $wgRawHtml;
1590                 if( $wgRawHtml && !$this->mTokenOk ) {
1591                         // Could be an offsite preview attempt. This is very unsafe if
1592                         // HTML is enabled, as it could be an attack.
1593                         return $wgOut->parse( "<div class='previewnote'>" .
1594                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1595                 }
1596
1597                 # don't parse user css/js, show message about preview
1598                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1599
1600                 if ( $this->isCssJsSubpage ) {
1601                         if(preg_match("/\\.css$/", $this->mTitle->getText() ) ) {
1602                                 $previewtext = wfMsg('usercsspreview');
1603                         } else if(preg_match("/\\.js$/", $this->mTitle->getText() ) ) {
1604                                 $previewtext = wfMsg('userjspreview');
1605                         }
1606                         $parserOptions->setTidy(true);
1607                         $parserOutput = $wgParser->parse( $previewtext , $this->mTitle, $parserOptions );
1608                         $wgOut->addHTML( $parserOutput->mText );
1609                         $previewHTML = '';
1610                 } else if( $rt = Title::newFromRedirect( $this->textbox1 ) ) {
1611                         $previewHTML = $this->mArticle->viewRedirect( $rt, false );
1612                 } else {
1613                         $toparse = $this->textbox1;
1614
1615                         # If we're adding a comment, we need to show the
1616                         # summary as the headline
1617                         if($this->section=="new" && $this->summary!="") {
1618                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1619                         }
1620
1621                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData;
1622
1623                         // Parse mediawiki messages with correct target language
1624                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1625                                 $pos = strrpos( $this->mTitle->getText(), '/' );
1626                                 if ( $pos !== false ) {
1627                                         $code = substr( $this->mTitle->getText(), $pos+1 );
1628                                         switch ($code) {
1629                                                 case $wgLang->getCode():
1630                                                         $obj = $wgLang; break;
1631                                                 case $wgContLang->getCode():
1632                                                         $obj = $wgContLang; break;
1633                                                 default:
1634                                                         $obj = Language::factory( $code );
1635                                         }
1636                                         $parserOptions->setTargetLanguage( $obj );
1637                                 }
1638                         }
1639
1640
1641                         $parserOptions->setTidy(true);
1642                         $parserOptions->enableLimitReport();
1643                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ),
1644                                         $this->mTitle, $parserOptions );
1645
1646                         $previewHTML = $parserOutput->getText();
1647                         $wgOut->addParserOutputNoText( $parserOutput );
1648
1649                         # ParserOutput might have altered the page title, so reset it
1650                         # Also, use the title defined by DISPLAYTITLE magic word when present
1651                         if( ( $dt = $parserOutput->getDisplayTitle() ) !== false ) {
1652                                 $wgOut->setPageTitle( wfMsg( 'editing', $dt ) );
1653                         } else {
1654                                 $wgOut->setPageTitle( wfMsg( 'editing', $wgTitle->getPrefixedText() ) );
1655                         }
1656
1657                         foreach ( $parserOutput->getTemplates() as $ns => $template)
1658                                 foreach ( array_keys( $template ) as $dbk)
1659                                         $this->mPreviewTemplates[] = Title::makeTitle($ns, $dbk);
1660
1661                         if ( count( $parserOutput->getWarnings() ) ) {
1662                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
1663                         }
1664                 }
1665
1666                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
1667                         "<div class='previewnote'>" . $wgOut->parse( $note ) . "</div>\n";
1668                 if ( $this->isConflict ) {
1669                         $previewhead.='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1670                 }
1671
1672                 if( $wgUser->getOption( 'previewontop' ) ) {
1673                         // Spacer for the edit toolbar
1674                         $previewfoot = '<p><br /></p>';
1675                 } else {
1676                         $previewfoot = '';
1677                 }
1678
1679                 wfProfileOut( $fname );
1680                 return $previewhead . $previewHTML . $previewfoot;
1681         }
1682
1683         /**
1684          * Call the stock "user is blocked" page
1685          */
1686         function blockedPage() {
1687                 global $wgOut, $wgUser;
1688                 $wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
1689
1690                 # If the user made changes, preserve them when showing the markup
1691                 # (This happens when a user is blocked during edit, for instance)
1692                 $first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
1693                 if( $first ) {
1694                         $source = $this->mTitle->exists() ? $this->getContent() : false;
1695                 } else {
1696                         $source = $this->textbox1;
1697                 }
1698
1699                 # Spit out the source or the user's modified version
1700                 if( $source !== false ) {
1701                         $rows = $wgUser->getOption( 'rows' );
1702                         $cols = $wgUser->getOption( 'cols' );
1703                         $attribs = array( 'id' => 'wpTextbox1', 'name' => 'wpTextbox1', 'cols' => $cols, 'rows' => $rows, 'readonly' => 'readonly' );
1704                         $wgOut->addHtml( '<hr />' );
1705                         $wgOut->addWikiMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() );
1706                         # Why we don't use Xml::element here?
1707                         # Is it because if $source is '', it returns <textarea />?
1708                         $wgOut->addHtml( Xml::openElement( 'textarea', $attribs ) . htmlspecialchars( $source ) . Xml::closeElement( 'textarea' ) );
1709                 }
1710         }
1711
1712         /**
1713          * Produce the stock "please login to edit pages" page
1714          */
1715         function userNotLoggedInPage() {
1716                 global $wgUser, $wgOut, $wgTitle;
1717                 $skin = $wgUser->getSkin();
1718
1719                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1720                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $wgTitle->getPrefixedUrl() );
1721
1722                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1723                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1724                 $wgOut->setArticleRelated( false );
1725
1726                 $wgOut->addHtml( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
1727                 $wgOut->returnToMain( false, $wgTitle );
1728         }
1729
1730         /**
1731          * Creates a basic error page which informs the user that
1732          * they have attempted to edit a nonexistant section.
1733          */
1734         function noSuchSectionPage() {
1735                 global $wgOut, $wgTitle;
1736
1737                 $wgOut->setPageTitle( wfMsg( 'nosuchsectiontitle' ) );
1738                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1739                 $wgOut->setArticleRelated( false );
1740
1741                 $wgOut->addWikiMsg( 'nosuchsectiontext', $this->section );
1742                 $wgOut->returnToMain( false, $wgTitle );
1743         }
1744
1745         /**
1746          * Produce the stock "your edit contains spam" page
1747          *
1748          * @param $match Text which triggered one or more filters
1749          */
1750         function spamPage( $match = false ) {
1751                 global $wgOut, $wgTitle;
1752
1753                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1754                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1755                 $wgOut->setArticleRelated( false );
1756
1757                 $wgOut->addHtml( '<div id="spamprotected">' );
1758                 $wgOut->addWikiMsg( 'spamprotectiontext' );
1759                 if ( $match )
1760                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
1761                 $wgOut->addHtml( '</div>' );
1762
1763                 $wgOut->returnToMain( false, $wgTitle );
1764         }
1765
1766         /**
1767          * @private
1768          * @todo document
1769          */
1770         function mergeChangesInto( &$editText ){
1771                 $fname = 'EditPage::mergeChangesInto';
1772                 wfProfileIn( $fname );
1773
1774                 $db = wfGetDB( DB_MASTER );
1775
1776                 // This is the revision the editor started from
1777                 $baseRevision = $this->getBaseRevision();
1778                 if( is_null( $baseRevision ) ) {
1779                         wfProfileOut( $fname );
1780                         return false;
1781                 }
1782                 $baseText = $baseRevision->getText();
1783
1784                 // The current state, we want to merge updates into it
1785                 $currentRevision =  Revision::loadFromTitle(
1786                         $db, $this->mTitle );
1787                 if( is_null( $currentRevision ) ) {
1788                         wfProfileOut( $fname );
1789                         return false;
1790                 }
1791                 $currentText = $currentRevision->getText();
1792
1793                 $result = '';
1794                 if( wfMerge( $baseText, $editText, $currentText, $result ) ){
1795                         $editText = $result;
1796                         wfProfileOut( $fname );
1797                         return true;
1798                 } else {
1799                         wfProfileOut( $fname );
1800                         return false;
1801                 }
1802         }
1803
1804         /**
1805          * Check if the browser is on a blacklist of user-agents known to
1806          * mangle UTF-8 data on form submission. Returns true if Unicode
1807          * should make it through, false if it's known to be a problem.
1808          * @return bool
1809          * @private
1810          */
1811         function checkUnicodeCompliantBrowser() {
1812                 global $wgBrowserBlackList;
1813                 if( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
1814                         // No User-Agent header sent? Trust it by default...
1815                         return true;
1816                 }
1817                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1818                 foreach ( $wgBrowserBlackList as $browser ) {
1819                         if ( preg_match($browser, $currentbrowser) ) {
1820                                 return false;
1821                         }
1822                 }
1823                 return true;
1824         }
1825
1826         /**
1827          * @deprecated use $wgParser->stripSectionName()
1828          */
1829         function pseudoParseSectionAnchor( $text ) {
1830                 global $wgParser;
1831                 return $wgParser->stripSectionName( $text );
1832         }
1833
1834         /**
1835          * Format an anchor fragment as it would appear for a given section name
1836          * @param string $text
1837          * @return string
1838          * @private
1839          */
1840         function sectionAnchor( $text ) {
1841                 global $wgParser;
1842                 return $wgParser->guessSectionNameFromWikiText( $text );
1843         }
1844
1845         /**
1846          * Shows a bulletin board style toolbar for common editing functions.
1847          * It can be disabled in the user preferences.
1848          * The necessary JavaScript code can be found in skins/common/edit.js.
1849          *
1850          * @return string
1851          */
1852         static function getEditToolbar() {
1853                 global $wgStylePath, $wgContLang, $wgLang, $wgJsMimeType;
1854
1855                 /**
1856                  * toolarray an array of arrays which each include the filename of
1857                  * the button image (without path), the opening tag, the closing tag,
1858                  * and optionally a sample text that is inserted between the two when no
1859                  * selection is highlighted.
1860                  * The tip text is shown when the user moves the mouse over the button.
1861                  *
1862                  * Already here are accesskeys (key), which are not used yet until someone
1863                  * can figure out a way to make them work in IE. However, we should make
1864                  * sure these keys are not defined on the edit page.
1865                  */
1866                 $toolarray = array(
1867                         array(
1868                                 'image'  => $wgLang->getImageFile('button-bold'),
1869                                 'id'     => 'mw-editbutton-bold',
1870                                 'open'   => '\'\'\'',
1871                                 'close'  => '\'\'\'',
1872                                 'sample' => wfMsg('bold_sample'),
1873                                 'tip'    => wfMsg('bold_tip'),
1874                                 'key'    => 'B'
1875                         ),
1876                         array(
1877                                 'image'  => $wgLang->getImageFile('button-italic'),
1878                                 'id'     => 'mw-editbutton-italic',
1879                                 'open'   => '\'\'',
1880                                 'close'  => '\'\'',
1881                                 'sample' => wfMsg('italic_sample'),
1882                                 'tip'    => wfMsg('italic_tip'),
1883                                 'key'    => 'I'
1884                         ),
1885                         array(
1886                                 'image'  => $wgLang->getImageFile('button-link'),
1887                                 'id'     => 'mw-editbutton-link',
1888                                 'open'   => '[[',
1889                                 'close'  => ']]',
1890                                 'sample' => wfMsg('link_sample'),
1891                                 'tip'    => wfMsg('link_tip'),
1892                                 'key'    => 'L'
1893                         ),
1894                         array(
1895                                 'image'  => $wgLang->getImageFile('button-extlink'),
1896                                 'id'     => 'mw-editbutton-extlink',
1897                                 'open'   => '[',
1898                                 'close'  => ']',
1899                                 'sample' => wfMsg('extlink_sample'),
1900                                 'tip'    => wfMsg('extlink_tip'),
1901                                 'key'    => 'X'
1902                         ),
1903                         array(
1904                                 'image'  => $wgLang->getImageFile('button-headline'),
1905                                 'id'     => 'mw-editbutton-headline',
1906                                 'open'   => "\n== ",
1907                                 'close'  => " ==\n",
1908                                 'sample' => wfMsg('headline_sample'),
1909                                 'tip'    => wfMsg('headline_tip'),
1910                                 'key'    => 'H'
1911                         ),
1912                         array(
1913                                 'image'  => $wgLang->getImageFile('button-image'),
1914                                 'id'     => 'mw-editbutton-image',
1915                                 'open'   => '[['.$wgContLang->getNsText(NS_IMAGE).':',
1916                                 'close'  => ']]',
1917                                 'sample' => wfMsg('image_sample'),
1918                                 'tip'    => wfMsg('image_tip'),
1919                                 'key'    => 'D'
1920                         ),
1921                         array(
1922                                 'image'  => $wgLang->getImageFile('button-media'),
1923                                 'id'     => 'mw-editbutton-media',
1924                                 'open'   => '[['.$wgContLang->getNsText(NS_MEDIA).':',
1925                                 'close'  => ']]',
1926                                 'sample' => wfMsg('media_sample'),
1927                                 'tip'    => wfMsg('media_tip'),
1928                                 'key'    => 'M'
1929                         ),
1930                         array(
1931                                 'image'  => $wgLang->getImageFile('button-math'),
1932                                 'id'     => 'mw-editbutton-math',
1933                                 'open'   => "<math>",
1934                                 'close'  => "</math>",
1935                                 'sample' => wfMsg('math_sample'),
1936                                 'tip'    => wfMsg('math_tip'),
1937                                 'key'    => 'C'
1938                         ),
1939                         array(
1940                                 'image'  => $wgLang->getImageFile('button-nowiki'),
1941                                 'id'     => 'mw-editbutton-nowiki',
1942                                 'open'   => "<nowiki>",
1943                                 'close'  => "</nowiki>",
1944                                 'sample' => wfMsg('nowiki_sample'),
1945                                 'tip'    => wfMsg('nowiki_tip'),
1946                                 'key'    => 'N'
1947                         ),
1948                         array(
1949                                 'image'  => $wgLang->getImageFile('button-sig'),
1950                                 'id'     => 'mw-editbutton-signature',
1951                                 'open'   => '--~~~~',
1952                                 'close'  => '',
1953                                 'sample' => '',
1954                                 'tip'    => wfMsg('sig_tip'),
1955                                 'key'    => 'Y'
1956                         ),
1957                         array(
1958                                 'image'  => $wgLang->getImageFile('button-hr'),
1959                                 'id'     => 'mw-editbutton-hr',
1960                                 'open'   => "\n----\n",
1961                                 'close'  => '',
1962                                 'sample' => '',
1963                                 'tip'    => wfMsg('hr_tip'),
1964                                 'key'    => 'R'
1965                         )
1966                 );
1967                 $toolbar = "<div id='toolbar'>\n";
1968                 $toolbar.="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
1969
1970                 foreach($toolarray as $tool) {
1971                         $params = array(
1972                                 $image = $wgStylePath.'/common/images/'.$tool['image'],
1973                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
1974                                 // Older browsers show a "speedtip" type message only for ALT.
1975                                 // Ideally these should be different, realistically they
1976                                 // probably don't need to be.
1977                                 $tip = $tool['tip'],
1978                                 $open = $tool['open'],
1979                                 $close = $tool['close'],
1980                                 $sample = $tool['sample'],
1981                                 $cssId = $tool['id'],
1982                         );
1983
1984                         $paramList = implode( ',',
1985                                 array_map( array( 'Xml', 'encodeJsVar' ), $params ) );
1986                         $toolbar.="addButton($paramList);\n";
1987                 }
1988
1989                 $toolbar.="/*]]>*/\n</script>";
1990                 $toolbar.="\n</div>";
1991                 return $toolbar;
1992         }
1993
1994         /**
1995          * Returns an array of html code of the following checkboxes:
1996          * minor and watch
1997          *
1998          * @param $tabindex Current tabindex
1999          * @param $skin Skin object
2000          * @param $checked Array of checkbox => bool, where bool indicates the checked
2001          *                 status of the checkbox
2002          *
2003          * @return array
2004          */
2005         public static function getCheckboxes( &$tabindex, $skin, $checked ) {
2006                 global $wgUser;
2007
2008                 $checkboxes = array();
2009
2010                 $checkboxes['minor'] = '';
2011                 $minorLabel = wfMsgExt('minoredit', array('parseinline'));
2012                 if ( $wgUser->isAllowed('minoredit') ) {
2013                         $attribs = array(
2014                                 'tabindex'  => ++$tabindex,
2015                                 'accesskey' => wfMsg( 'accesskey-minoredit' ),
2016                                 'id'        => 'wpMinoredit',
2017                         );
2018                         $checkboxes['minor'] =
2019                                 Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
2020                                 "&nbsp;<label for='wpMinoredit'".$skin->tooltip('minoredit', 'withaccess').">{$minorLabel}</label>";
2021                 }
2022
2023                 $watchLabel = wfMsgExt('watchthis', array('parseinline'));
2024                 $checkboxes['watch'] = '';
2025                 if ( $wgUser->isLoggedIn() ) {
2026                         $attribs = array(
2027                                 'tabindex'  => ++$tabindex,
2028                                 'accesskey' => wfMsg( 'accesskey-watch' ),
2029                                 'id'        => 'wpWatchthis',
2030                         );
2031                         $checkboxes['watch'] =
2032                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
2033                                 "&nbsp;<label for='wpWatchthis'".$skin->tooltip('watch', 'withaccess').">{$watchLabel}</label>";
2034                 }
2035                 return $checkboxes;
2036         }
2037
2038         /**
2039          * Returns an array of html code of the following buttons:
2040          * save, diff, preview and live
2041          *
2042          * @param $tabindex Current tabindex
2043          *
2044          * @return array
2045          */
2046         public function getEditButtons(&$tabindex) {
2047                 global $wgLivePreview, $wgUser;
2048
2049                 $buttons = array();
2050
2051                 $temp = array(
2052                         'id'        => 'wpSave',
2053                         'name'      => 'wpSave',
2054                         'type'      => 'submit',
2055                         'tabindex'  => ++$tabindex,
2056                         'value'     => wfMsg('savearticle'),
2057                         'accesskey' => wfMsg('accesskey-save'),
2058                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
2059                 );
2060                 $buttons['save'] = Xml::element('input', $temp, '');
2061
2062                 ++$tabindex; // use the same for preview and live preview
2063                 if ( $wgLivePreview && $wgUser->getOption( 'uselivepreview' ) ) {
2064                         $temp = array(
2065                                 'id'        => 'wpPreview',
2066                                 'name'      => 'wpPreview',
2067                                 'type'      => 'submit',
2068                                 'tabindex'  => $tabindex,
2069                                 'value'     => wfMsg('showpreview'),
2070                                 'accesskey' => '',
2071                                 'title'     => wfMsg( 'tooltip-preview' ).' ['.wfMsg( 'accesskey-preview' ).']',
2072                                 'style'     => 'display: none;',
2073                         );
2074                         $buttons['preview'] = Xml::element('input', $temp, '');
2075
2076                         $temp = array(
2077                                 'id'        => 'wpLivePreview',
2078                                 'name'      => 'wpLivePreview',
2079                                 'type'      => 'submit',
2080                                 'tabindex'  => $tabindex,
2081                                 'value'     => wfMsg('showlivepreview'),
2082                                 'accesskey' => wfMsg('accesskey-preview'),
2083                                 'title'     => '',
2084                                 'onclick'   => $this->doLivePreviewScript(),
2085                         );
2086                         $buttons['live'] = Xml::element('input', $temp, '');
2087                 } else {
2088                         $temp = array(
2089                                 'id'        => 'wpPreview',
2090                                 'name'      => 'wpPreview',
2091                                 'type'      => 'submit',
2092                                 'tabindex'  => $tabindex,
2093                                 'value'     => wfMsg('showpreview'),
2094                                 'accesskey' => wfMsg('accesskey-preview'),
2095                                 'title'     => wfMsg( 'tooltip-preview' ).' ['.wfMsg( 'accesskey-preview' ).']',
2096                         );
2097                         $buttons['preview'] = Xml::element('input', $temp, '');
2098                         $buttons['live'] = '';
2099                 }
2100
2101                 $temp = array(
2102                         'id'        => 'wpDiff',
2103                         'name'      => 'wpDiff',
2104                         'type'      => 'submit',
2105                         'tabindex'  => ++$tabindex,
2106                         'value'     => wfMsg('showdiff'),
2107                         'accesskey' => wfMsg('accesskey-diff'),
2108                         'title'     => wfMsg( 'tooltip-diff' ).' ['.wfMsg( 'accesskey-diff' ).']',
2109                 );
2110                 $buttons['diff'] = Xml::element('input', $temp, '');
2111
2112                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons ) );
2113                 return $buttons;
2114         }
2115
2116         /**
2117          * Output preview text only. This can be sucked into the edit page
2118          * via JavaScript, and saves the server time rendering the skin as
2119          * well as theoretically being more robust on the client (doesn't
2120          * disturb the edit box's undo history, won't eat your text on
2121          * failure, etc).
2122          *
2123          * @todo This doesn't include category or interlanguage links.
2124          *       Would need to enhance it a bit, <s>maybe wrap them in XML
2125          *       or something...</s> that might also require more skin
2126          *       initialization, so check whether that's a problem.
2127          */
2128         function livePreview() {
2129                 global $wgOut;
2130                 $wgOut->disable();
2131                 header( 'Content-type: text/xml; charset=utf-8' );
2132                 header( 'Cache-control: no-cache' );
2133
2134                 $previewText = $this->getPreviewText();
2135                 #$categories = $skin->getCategoryLinks();
2136
2137                 $s =
2138                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
2139                 Xml::tags( 'livepreview', null,
2140                         Xml::element( 'preview', null, $previewText )
2141                         #.      Xml::element( 'category', null, $categories )
2142                 );
2143                 echo $s;
2144         }
2145
2146
2147         /**
2148          * Get a diff between the current contents of the edit box and the
2149          * version of the page we're editing from.
2150          *
2151          * If this is a section edit, we'll replace the section as for final
2152          * save and then make a comparison.
2153          */
2154         function showDiff() {
2155                 $oldtext = $this->mArticle->fetchContent();
2156                 $newtext = $this->mArticle->replaceSection(
2157                         $this->section, $this->textbox1, $this->summary, $this->edittime );
2158                 $newtext = $this->mArticle->preSaveTransform( $newtext );
2159                 $oldtitle = wfMsgExt( 'currentrev', array('parseinline') );
2160                 $newtitle = wfMsgExt( 'yourtext', array('parseinline') );
2161                 if ( $oldtext !== false  || $newtext != '' ) {
2162                         $de = new DifferenceEngine( $this->mTitle );
2163                         $de->setText( $oldtext, $newtext );
2164                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2165                         $de->showDiffStyle();
2166                 } else {
2167                         $difftext = '';
2168                 }
2169
2170                 global $wgOut;
2171                 $wgOut->addHtml( '<div id="wikiDiff">' . $difftext . '</div>' );
2172         }
2173
2174         /**
2175          * Filter an input field through a Unicode de-armoring process if it
2176          * came from an old browser with known broken Unicode editing issues.
2177          *
2178          * @param WebRequest $request
2179          * @param string $field
2180          * @return string
2181          * @private
2182          */
2183         function safeUnicodeInput( $request, $field ) {
2184                 $text = rtrim( $request->getText( $field ) );
2185                 return $request->getBool( 'safemode' )
2186                         ? $this->unmakesafe( $text )
2187                         : $text;
2188         }
2189
2190         /**
2191          * Filter an output field through a Unicode armoring process if it is
2192          * going to an old browser with known broken Unicode editing issues.
2193          *
2194          * @param string $text
2195          * @return string
2196          * @private
2197          */
2198         function safeUnicodeOutput( $text ) {
2199                 global $wgContLang;
2200                 $codedText = $wgContLang->recodeForEdit( $text );
2201                 return $this->checkUnicodeCompliantBrowser()
2202                         ? $codedText
2203                         : $this->makesafe( $codedText );
2204         }
2205
2206         /**
2207          * A number of web browsers are known to corrupt non-ASCII characters
2208          * in a UTF-8 text editing environment. To protect against this,
2209          * detected browsers will be served an armored version of the text,
2210          * with non-ASCII chars converted to numeric HTML character references.
2211          *
2212          * Preexisting such character references will have a 0 added to them
2213          * to ensure that round-trips do not alter the original data.
2214          *
2215          * @param string $invalue
2216          * @return string
2217          * @private
2218          */
2219         function makesafe( $invalue ) {
2220                 // Armor existing references for reversability.
2221                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
2222
2223                 $bytesleft = 0;
2224                 $result = "";
2225                 $working = 0;
2226                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2227                         $bytevalue = ord( $invalue{$i} );
2228                         if( $bytevalue <= 0x7F ) { //0xxx xxxx
2229                                 $result .= chr( $bytevalue );
2230                                 $bytesleft = 0;
2231                         } elseif( $bytevalue <= 0xBF ) { //10xx xxxx
2232                                 $working = $working << 6;
2233                                 $working += ($bytevalue & 0x3F);
2234                                 $bytesleft--;
2235                                 if( $bytesleft <= 0 ) {
2236                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
2237                                 }
2238                         } elseif( $bytevalue <= 0xDF ) { //110x xxxx
2239                                 $working = $bytevalue & 0x1F;
2240                                 $bytesleft = 1;
2241                         } elseif( $bytevalue <= 0xEF ) { //1110 xxxx
2242                                 $working = $bytevalue & 0x0F;
2243                                 $bytesleft = 2;
2244                         } else { //1111 0xxx
2245                                 $working = $bytevalue & 0x07;
2246                                 $bytesleft = 3;
2247                         }
2248                 }
2249                 return $result;
2250         }
2251
2252         /**
2253          * Reverse the previously applied transliteration of non-ASCII characters
2254          * back to UTF-8. Used to protect data from corruption by broken web browsers
2255          * as listed in $wgBrowserBlackList.
2256          *
2257          * @param string $invalue
2258          * @return string
2259          * @private
2260          */
2261         function unmakesafe( $invalue ) {
2262                 $result = "";
2263                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2264                         if( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
2265                                 $i += 3;
2266                                 $hexstring = "";
2267                                 do {
2268                                         $hexstring .= $invalue{$i};
2269                                         $i++;
2270                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
2271
2272                                 // Do some sanity checks. These aren't needed for reversability,
2273                                 // but should help keep the breakage down if the editor
2274                                 // breaks one of the entities whilst editing.
2275                                 if ((substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6)) {
2276                                         $codepoint = hexdec($hexstring);
2277                                         $result .= codepointToUtf8( $codepoint );
2278                                 } else {
2279                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
2280                                 }
2281                         } else {
2282                                 $result .= substr( $invalue, $i, 1 );
2283                         }
2284                 }
2285                 // reverse the transform that we made for reversability reasons.
2286                 return strtr( $result, array( "&#x0" => "&#x" ) );
2287         }
2288
2289         function noCreatePermission() {
2290                 global $wgOut;
2291                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
2292                 $wgOut->addWikiMsg( 'nocreatetext' );
2293         }
2294
2295         /**
2296          * If there are rows in the deletion log for this page, show them,
2297          * along with a nice little note for the user
2298          *
2299          * @param OutputPage $out
2300          */
2301         protected function showDeletionLog( $out ) {
2302                 global $wgUser;
2303                 $loglist = new LogEventsList( $wgUser->getSkin(), $out );
2304                 $pager = new LogPager( $loglist, 'delete', false, $this->mTitle->getPrefixedText() );
2305                 if( $pager->getNumRows() > 0 ) {
2306                         $out->addHtml( '<div id="mw-recreate-deleted-warn">' );
2307                         $out->addWikiMsg( 'recreate-deleted-warn' );
2308                         $out->addHTML(
2309                                 $loglist->beginLogEventsList() .
2310                                 $pager->getBody() .
2311                                 $loglist->endLogEventsList()
2312                         );
2313                         $out->addHtml( '</div>' );
2314                 }
2315         }
2316
2317         /**
2318          * Attempt submission
2319          * @return bool false if output is done, true if the rest of the form should be displayed
2320          */
2321         function attemptSave() {
2322                 global $wgUser, $wgOut, $wgTitle, $wgRequest;
2323
2324                 $resultDetails = false;
2325                 $value = $this->internalAttemptSave( $resultDetails, $wgUser->isAllowed('bot') && $wgRequest->getBool('bot', true) );
2326
2327                 if( $value == self::AS_SUCCESS_UPDATE || $value == self::AS_SUCCESS_NEW_ARTICLE ) {
2328                         $this->didSave = true;
2329                 }
2330
2331                 switch ($value) {
2332                         case self::AS_HOOK_ERROR_EXPECTED:
2333                         case self::AS_CONTENT_TOO_BIG:
2334                         case self::AS_ARTICLE_WAS_DELETED:
2335                         case self::AS_CONFLICT_DETECTED:
2336                         case self::AS_SUMMARY_NEEDED:
2337                         case self::AS_TEXTBOX_EMPTY:
2338                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
2339                         case self::AS_END:
2340                                 return true;
2341
2342                         case self::AS_HOOK_ERROR:
2343                         case self::AS_FILTERING:
2344                         case self::AS_SUCCESS_NEW_ARTICLE:
2345                         case self::AS_SUCCESS_UPDATE:
2346                                 return false;
2347
2348                         case self::AS_SPAM_ERROR:
2349                                 $this->spamPage ( $resultDetails['spam'] );
2350                                 return false;
2351
2352                         case self::AS_BLOCKED_PAGE_FOR_USER:
2353                                 $this->blockedPage();
2354                                 return false;
2355
2356                         case self::AS_IMAGE_REDIRECT_ANON:
2357                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
2358                                 return false;
2359
2360                         case self::AS_READ_ONLY_PAGE_ANON:
2361                                 $this->userNotLoggedInPage();
2362                                 return false;
2363
2364                         case self::AS_READ_ONLY_PAGE_LOGGED:
2365                         case self::AS_READ_ONLY_PAGE:
2366                                 $wgOut->readOnlyPage();
2367                                 return false;
2368
2369                         case self::AS_RATE_LIMITED:
2370                                 $wgOut->rateLimited();
2371                                 return false;
2372
2373                         case self::AS_NO_CREATE_PERMISSION;
2374                                 $this->noCreatePermission();
2375                                 return;
2376
2377                         case self::AS_BLANK_ARTICLE:
2378                                 $wgOut->redirect( $wgTitle->getFullURL() );
2379                                 return false;
2380
2381                         case self::AS_IMAGE_REDIRECT_LOGGED:
2382                                 $wgOut->permissionRequired( 'upload' );
2383                                 return false;
2384                 }
2385         }
2386
2387         function getBaseRevision() {
2388                 if ($this->mBaseRevision == false) {
2389                         $db = wfGetDB( DB_MASTER );
2390                         $baseRevision = Revision::loadFromTimestamp(
2391                                 $db, $this->mTitle, $this->edittime );
2392                         return $this->mBaseRevision = $baseRevision;
2393                 } else {
2394                         return $this->mBaseRevision;
2395                 }
2396         }
2397 }