includes/EditPage.php

   1 <?php
   2 /**
   3  * Contain the EditPage class
   4  * @package MediaWiki
   5  */
   6
   7 /**
   8  * Splitting edit page/HTML interface 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  * @package MediaWiki
  14  */
  15
  16 class EditPage {
  17         var $mArticle;
  18         var $mTitle;
  19         var $mMetaData = '';
  20
  21         # Form values
  22         var $save = false, $preview = false, $diff = false;
  23         var $minoredit = false, $watchthis = false;
  24         var $textbox1 = '', $textbox2 = '', $summary = '';
  25         var $edittime = '', $section = '';
  26         var $oldid = 0;
  27
  28         /**
  29          * @todo document
  30          * @param $article
  31          */
  32         function EditPage( $article ) {
  33                 $this->mArticle =& $article;
  34                 global $wgTitle;
  35                 $this->mTitle =& $wgTitle;
  36         }
  37
  38         /**
  39          * This is the function that extracts metadata from the article body on the first view.
  40          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
  41          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
  42          */
  43         function extractMetaDataFromArticle () {
  44                 global $wgUseMetadataEdit , $wgMetadataWhitelist , $wgLang ;
  45                 $this->mMetaData = '' ;
  46                 if ( !$wgUseMetadataEdit ) return ;
  47                 if ( $wgMetadataWhitelist == '' ) return ;
  48                 $s = '' ;
  49                 $t = $this->mArticle->getContent ( true ) ;
  50
  51                 # MISSING : <nowiki> filtering
  52
  53                 # Categories and language links
  54                 $t = explode ( "\n" , $t ) ;
  55                 $catlow = strtolower ( $wgLang->getNsText ( NS_CATEGORY ) ) ;
  56                 $cat = $ll = array() ;
  57                 foreach ( $t AS $key => $x )
  58                 {
  59                         $y = trim ( strtolower ( $x ) ) ;
  60                         while ( substr ( $y , 0 , 2 ) == '[[' )
  61                         {
  62                                 $y = explode ( ']]' , trim ( $x ) ) ;
  63                                 $first = array_shift ( $y ) ;
  64                                 $first = explode ( ':' , $first ) ;
  65                                 $ns = array_shift ( $first ) ;
  66                                 $ns = trim ( str_replace ( '[' , '' , $ns ) ) ;
  67                                 if ( strlen ( $ns ) == 2 OR strtolower ( $ns ) == $catlow )
  68                                 {
  69                                         $add = '[[' . $ns . ':' . implode ( ':' , $first ) . ']]' ;
  70                                         if ( strtolower ( $ns ) == $catlow ) $cat[] = $add ;
  71                                         else $ll[] = $add ;
  72                                         $x = implode ( ']]' , $y ) ;
  73                                         $t[$key] = $x ;
  74                                         $y = trim ( strtolower ( $x ) ) ;
  75                                 }
  76                         }
  77                 }
  78                 if ( count ( $cat ) ) $s .= implode ( ' ' , $cat ) . "\n" ;
  79                 if ( count ( $ll ) ) $s .= implode ( ' ' , $ll ) . "\n" ;
  80                 $t = implode ( "\n" , $t ) ;
  81
  82                 # Load whitelist
  83                 $sat = array () ; # stand-alone-templates; must be lowercase
  84                 $wl_title = Title::newFromText ( $wgMetadataWhitelist ) ;
  85                 $wl_article = new Article ( $wl_title ) ;
  86                 $wl = explode ( "\n" , $wl_article->getContent(true) ) ;
  87                 foreach ( $wl AS $x )
  88                 {
  89                         $isentry = false ;
  90                         $x = trim ( $x ) ;
  91                         while ( substr ( $x , 0 , 1 ) == '*' )
  92                         {
  93                                 $isentry = true ;
  94                                 $x = trim ( substr ( $x , 1 ) ) ;
  95                         }
  96                         if ( $isentry )
  97                         {
  98                                 $sat[] = strtolower ( $x ) ;
  99                         }
 100
 101                 }
 102
 103                 # Templates, but only some
 104                 $t = explode ( '{{' , $t ) ;
 105                 $tl = array () ;
 106                 foreach ( $t AS $key => $x )
 107                 {
 108                         $y = explode ( '}}' , $x , 2 ) ;
 109                         if ( count ( $y ) == 2 )
 110                         {
 111                                 $z = $y[0] ;
 112                                 $z = explode ( '|' , $z ) ;
 113                                 $tn = array_shift ( $z ) ;
 114                                 if ( in_array ( strtolower ( $tn ) , $sat ) )
 115                                 {
 116                                         $tl[] = '{{' . $y[0] . '}}' ;
 117                                         $t[$key] = $y[1] ;
 118                                         $y = explode ( '}}' , $y[1] , 2 ) ;
 119                                 }
 120                                 else $t[$key] = '{{' . $x ;
 121                         }
 122                         else if ( $key != 0 ) $t[$key] = '{{' . $x ;
 123                         else $t[$key] = $x ;
 124                 }
 125                 if ( count ( $tl ) ) $s .= implode ( ' ' , $tl ) ;
 126                 $t = implode ( '' , $t ) ;
 127
 128                 $t = str_replace ( "\n\n\n" , "\n" , $t ) ;
 129                 $this->mArticle->mContent = $t ;
 130                 $this->mMetaData = $s ;
 131         }
 132
 133         /**
 134          * This is the function that gets called for "action=edit".
 135          */
 136         function edit() {
 137                 global $wgOut, $wgUser, $wgRequest;
 138                 // this is not an article
 139                 $wgOut->setArticleFlag(false);
 140
 141                 $this->importFormData( $wgRequest );
 142
 143                 if( $this->live ) {
 144                         $this->livePreview();
 145                         return;
 146                 }
 147
 148                 if ( ! $this->mTitle->userCanEdit() ) {
 149                         $wgOut->readOnlyPage( $this->mArticle->getContent( true ), true );
 150                         return;
 151                 }
 152                 if ( !$this->preview && !$this->diff && $wgUser->isBlocked( !$this->save ) ) {
 153                         # When previewing, don't check blocked state - will get caught at save time.
 154                         # Also, check when starting edition is done against slave to improve performance.
 155                         $this->blockedIPpage();
 156                         return;
 157                 }
 158                 if ( !$wgUser->isAllowed('edit') ) {
 159                         if ( $wgUser->isAnon() ) {
 160                                 $this->userNotLoggedInPage();
 161                                 return;
 162                         } else {
 163                                 $wgOut->readOnlyPage( $this->mArticle->getContent( true ), true );
 164                                 return;
 165                         }
 166                 }
 167                 if ( wfReadOnly() ) {
 168                         if( $this->save || $this->preview ) {
 169                                 $this->editForm( 'preview' );
 170                         } else if ( $this->diff ) {
 171                                 $this->editForm( 'diff' );
 172                         } else {
 173                                 $wgOut->readOnlyPage( $this->mArticle->getContent( true ) );
 174                         }
 175                         return;
 176                 }
 177                 if ( $this->save ) {
 178                         $this->editForm( 'save' );
 179                 } else if ( $this->preview ) {
 180                         $this->editForm( 'preview' );
 181                 } else if ( $this->diff ) {
 182                         $this->editForm( 'diff' );
 183                 } else { # First time through
 184                         if( $wgUser->getOption('previewonfirst')
 185                                 or $this->mTitle->getNamespace() == NS_CATEGORY ) {
 186                                 $this->editForm( 'preview', true );
 187                         } else {
 188                                 $this->extractMetaDataFromArticle () ;
 189                                 $this->editForm( 'initial', true );
 190                         }
 191                 }
 192         }
 193
 194         /**
 195          * @todo document
 196          */
 197         function importFormData( &$request ) {
 198                 if( $request->wasPosted() ) {
 199                         # These fields need to be checked for encoding.
 200                         # Also remove trailing whitespace, but don't remove _initial_
 201                         # whitespace from the text boxes. This may be significant formatting.
 202                         $this->textbox1  = rtrim( $request->getText( 'wpTextbox1' ) );
 203                         $this->textbox2  = rtrim( $request->getText( 'wpTextbox2' ) );
 204                         $this->mMetaData = rtrim( $request->getText( 'metadata'   ) );
 205                         $this->summary   =        $request->getText( 'wpSummary'  );
 206
 207                         $this->edittime = $request->getVal( 'wpEdittime' );
 208                         if( is_null( $this->edittime ) ) {
 209                                 # If the form is incomplete, force to preview.
 210                                 $this->preview  = true;
 211                         } else {
 212                                 if( $this->tokenOk( $request ) ) {
 213                                         # Some browsers will not report any submit button
 214                                         # if the user hits enter in the comment box.
 215                                         # The unmarked state will be assumed to be a save,
 216                                         # if the form seems otherwise complete.
 217                                         $this->preview = $request->getCheck( 'wpPreview' );
 218                                         $this->diff = $request->getCheck( 'wpDiff' );
 219                                 } else {
 220                                         # Page might be a hack attempt posted from
 221                                         # an external site. Preview instead of saving.
 222                                         $this->preview = true;
 223                                 }
 224                         }
 225                         $this->save    = ! ( $this->preview OR $this->diff );
 226                         if( !preg_match( '/^\d{14}$/', $this->edittime )) {
 227                                 $this->edittime = null;
 228                         }
 229
 230                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 231                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 232                 } else {
 233                         # Not a posted form? Start with nothing.
 234                         $this->textbox1  = '';
 235                         $this->textbox2  = '';
 236                         $this->mMetaData = '';
 237                         $this->summary   = '';
 238                         $this->edittime  = '';
 239                         $this->preview   = false;
 240                         $this->save      = false;
 241                         $this->diff      = false;
 242                         $this->minoredit = false;
 243                         $this->watchthis = false;
 244                 }
 245
 246                 $this->oldid = $request->getInt( 'oldid' );
 247
 248                 # Section edit can come from either the form or a link
 249                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 250
 251                 $this->live = $request->getCheck( 'live' );
 252         }
 253
 254         /**
 255          * Make sure the form isn't faking a user's credentials.
 256          *
 257          * @param WebRequest $request
 258          * @return bool
 259          * @access private
 260          */
 261         function tokenOk( &$request ) {
 262                 global $wgUser;
 263                 if( $wgUser->isAnon() ) {
 264                         # Anonymous users may not have a session
 265                         # open. Don't tokenize.
 266                         return true;
 267                 } else {
 268                         return $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
 269                 }
 270         }
 271
 272         function submit() {
 273                 $this->edit();
 274         }
 275
 276         /**
 277          * The edit form is self-submitting, so that when things like
 278          * preview and edit conflicts occur, we get the same form back
 279          * with the extra stuff added.  Only when the final submission
 280          * is made and all is well do we actually save and redirect to
 281          * the newly-edited page.
 282          *
 283          * @param string $formtype Type of form either : save, initial, diff or preview
 284          * @param bool $firsttime True to load form data from db
 285          */
 286         function editForm( $formtype, $firsttime = false ) {
 287                 global $wgOut, $wgUser;
 288                 global $wgLang, $wgContLang, $wgParser, $wgTitle;
 289                 global $wgAllowAnonymousMinor;
 290                 global $wgSpamRegex, $wgFilterCallback;
 291
 292                 $sk = $wgUser->getSkin();
 293                 $isConflict = false;
 294                 // css / js subpages of user pages get a special treatment
 295                 $isCssJsSubpage = $wgTitle->isCssJsSubpage();
 296
 297
 298                 if(!$this->mTitle->getArticleID()) { # new article
 299                         $wgOut->addWikiText(wfmsg('newarticletext'));
 300                 }
 301
 302                 if( $this->mTitle->isTalkPage() ) {
 303                         $wgOut->addWikiText(wfmsg('talkpagetext'));
 304                 }
 305
 306                 # Attempt submission here.  This will check for edit conflicts,
 307                 # and redundantly check for locked database, blocked IPs, etc.
 308                 # that edit() already checked just in case someone tries to sneak
 309                 # in the back door with a hand-edited submission URL.
 310
 311                 if ( 'save' == $formtype ) {
 312                         # Reintegrate metadata
 313                         if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 314                         $this->mMetaData = '' ;
 315
 316                         # Check for spam
 317                         if ( $wgSpamRegex && preg_match( $wgSpamRegex, $this->textbox1, $matches ) ) {
 318                                 $this->spamPage ( $matches[0] );
 319                                 return;
 320                         }
 321                         if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section ) ) {
 322                                 # Error messages or other handling should be performed by the filter function
 323                                 return;
 324                         }
 325                         if ( $wgUser->isBlocked( false ) ) {
 326                                 # Check block state against master, thus 'false'.
 327                                 $this->blockedIPpage();
 328                                 return;
 329                         }
 330
 331                         if ( !$wgUser->isAllowed('edit') ) {
 332                                 if ( $wgUser->isAnon() ) {
 333                                 $this->userNotLoggedInPage();
 334                                 return;
 335                         }
 336                                 else {
 337                                         $wgOut->readOnlyPage();
 338                                         return;
 339                                 }
 340                         }
 341
 342                         if ( wfReadOnly() ) {
 343                                 $wgOut->readOnlyPage();
 344                                 return;
 345                         }
 346                         if ( $wgUser->pingLimiter() ) {
 347                                 $wgOut->rateLimited();
 348                                 return;
 349                         }
 350
 351                         # If article is new, insert it.
 352                         $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 353                         if ( 0 == $aid ) {
 354                                 # Don't save a new article if it's blank.
 355                                 if ( ( '' == $this->textbox1 ) ||
 356                                   ( wfMsg( 'newarticletext' ) == $this->textbox1 ) ) {
 357                                         $wgOut->redirect( $this->mTitle->getFullURL() );
 358                                         return;
 359                                 }
 360                                 if (wfRunHooks('ArticleSave', array(&$this->mArticle, &$wgUser, &$this->textbox1,
 361                                                            &$this->summary, &$this->minoredit, &$this->watchthis, NULL)))
 362                                 {
 363                                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 364                                                                                                            $this->minoredit, $this->watchthis );
 365                                         wfRunHooks('ArticleSaveComplete', array(&$this->mArticle, &$wgUser, $this->textbox1,
 366                                                                                                                         $this->summary, $this->minoredit,
 367                                                                                                                         $this->watchthis, NULL));
 368                                 }
 369                                 return;
 370                         }
 371
 372                         # Article exists. Check for edit conflict.
 373
 374                         $this->mArticle->clear(); # Force reload of dates, etc.
 375                         $this->mArticle->forUpdate( true ); # Lock the article
 376
 377                         if( ( $this->section != 'new' ) &&
 378                                 ($this->mArticle->getTimestamp() != $this->edittime ) ) {
 379                                 $isConflict = true;
 380                         }
 381                         $userid = $wgUser->getID();
 382
 383                         if ( $isConflict) {
 384                                 wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 385                                         $this->mArticle->getTimestamp() . "'\n" );
 386                                 $text = $this->mArticle->getTextOfLastEditWithSectionReplacedOrAdded(
 387                                         $this->section, $this->textbox1, $this->summary, $this->edittime);
 388                         }
 389                         else {
 390                                 wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 391                                 $text = $this->mArticle->getTextOfLastEditWithSectionReplacedOrAdded(
 392                                         $this->section, $this->textbox1, $this->summary);
 393                         }
 394                         # Suppress edit conflict with self
 395
 396                         if ( ( 0 != $userid ) && ( $this->mArticle->getUser() == $userid ) ) {
 397                                 wfDebug( "Suppressing edit conflict, same user.\n" );
 398                                 $isConflict = false;
 399                         } else {
 400                                 # switch from section editing to normal editing in edit conflict
 401                                 if($isConflict) {
 402                                         # Attempt merge
 403                                         if( $this->mergeChangesInto( $text ) ){
 404                                                 // Successful merge! Maybe we should tell the user the good news?
 405                                                 $isConflict = false;
 406                                                 wfDebug( "Suppressing edit conflict, successful merge.\n" );
 407                                         } else {
 408                                                 $this->section = '';
 409                                                 $this->textbox1 = $text;
 410                                                 wfDebug( "Keeping edit conflict, failed merge.\n" );
 411                                         }
 412                                 }
 413                         }
 414                         if ( ! $isConflict ) {
 415                                 # All's well
 416                                 $sectionanchor = '';
 417                                 if( $this->section == 'new' ) {
 418                                         if( $this->summary != '' ) {
 419                                                 $sectionanchor = $this->sectionAnchor( $this->summary );
 420                                         }
 421                                 } elseif( $this->section != '' ) {
 422                                         # Try to get a section anchor from the section source, redirect to edited section if header found
 423                                         # XXX: might be better to integrate this into Article::getTextOfLastEditWithSectionReplacedOrAdded
 424                                         # for duplicate heading checking and maybe parsing
 425                                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 426                                         # we can't deal with anchors, includes, html etc in the header for now,
 427                                         # headline would need to be parsed to improve this
 428                                         #if($hasmatch and strlen($matches[2]) > 0 and !preg_match( "/[\\['{<>]/", $matches[2])) {
 429                                         if($hasmatch and strlen($matches[2]) > 0) {
 430                                                 $sectionanchor = $this->sectionAnchor( $matches[2] );
 431                                         }
 432                                 }
 433
 434                                 if (wfRunHooks('ArticleSave', array(&$this->mArticle, &$wgUser, &$text,
 435                                                                                                         &$this->summary, &$this->minoredit,
 436                                                                                                         &$this->watchthis, &$sectionanchor)))
 437                                 {
 438                                         # update the article here
 439                                         if($this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
 440                                                                                                            $this->watchthis, '', $sectionanchor ))
 441                                         {
 442                                                 wfRunHooks('ArticleSaveComplete', array(&$this->mArticle, &$wgUser, $text,
 443                                                                                                                                 $this->summary, $this->minoredit,
 444                                                                                                                                 $this->watchthis, $sectionanchor));
 445                                                 return;
 446                                         }
 447                                         else
 448                                           $isConflict = true;
 449                                 }
 450                         }
 451                 }
 452                 # First time through: get contents, set time for conflict
 453                 # checking, etc.
 454
 455                 if ( 'initial' == $formtype || $firsttime ) {
 456                         $this->edittime = $this->mArticle->getTimestamp();
 457                         $this->textbox1 = $this->mArticle->getContent( true );
 458                         $this->summary = '';
 459                         $this->proxyCheck();
 460                 }
 461                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 462
 463                 # Enabled article-related sidebar, toplinks, etc.
 464                 $wgOut->setArticleRelated( true );
 465
 466                 if ( $isConflict ) {
 467                         $s = wfMsg( 'editconflict', $this->mTitle->getPrefixedText() );
 468                         $wgOut->setPageTitle( $s );
 469                         $wgOut->addWikiText( wfMsg( 'explainconflict' ) );
 470
 471                         $this->textbox2 = $this->textbox1;
 472                         $this->textbox1 = $this->mArticle->getContent( true );
 473                         $this->edittime = $this->mArticle->getTimestamp();
 474                 } else {
 475
 476                         if( $this->section != '' ) {
 477                                 if( $this->section == 'new' ) {
 478                                         $s = wfMsg('editingcomment', $this->mTitle->getPrefixedText() );
 479                                 } else {
 480                                         $s = wfMsg('editingsection', $this->mTitle->getPrefixedText() );
 481                                 }
 482                                 if(!$this->preview) {
 483                                         preg_match( "/^(=+)(.+)\\1/mi",
 484                                                 $this->textbox1,
 485                                                 $matches );
 486                                         if( !empty( $matches[2] ) ) {
 487                                                 $this->summary = "/* ". trim($matches[2])." */ ";
 488                                         }
 489                                 }
 490                         } else {
 491                                 $s = wfMsg( 'editing', $this->mTitle->getPrefixedText() );
 492                         }
 493                         $wgOut->setPageTitle( $s );
 494                         if ( !$this->checkUnicodeCompliantBrowser() ) {
 495                                 $this->mArticle->setOldSubtitle();
 496                                 $wgOut->addWikiText( wfMsg( 'nonunicodebrowser') );
 497                         }
 498                         if ( $this->oldid ) {
 499                                 $this->mArticle->setOldSubtitle();
 500                                 $wgOut->addWikiText( wfMsg( 'editingold' ) );
 501                         }
 502                 }
 503
 504                 if( wfReadOnly() ) {
 505                         $wgOut->addWikiText( wfMsg( 'readonlywarning' ) );
 506                 } else if ( $isCssJsSubpage and 'preview' != $formtype) {
 507                         $wgOut->addWikiText( wfMsg( 'usercssjsyoucanpreview' ));
 508                 }
 509                 if( $this->mTitle->isProtected('edit') ) {
 510                         $wgOut->addWikiText( wfMsg( 'protectedpagewarning' ) );
 511                 }
 512
 513                 $kblength = (int)(strlen( $this->textbox1 ) / 1024);
 514                 if( $kblength > 29 ) {
 515                         $wgOut->addWikiText( wfMsg( 'longpagewarning', $wgLang->formatNum( $kblength ) ) );
 516                 }
 517
 518                 $rows = $wgUser->getOption( 'rows' );
 519                 $cols = $wgUser->getOption( 'cols' );
 520
 521                 $ew = $wgUser->getOption( 'editwidth' );
 522                 if ( $ew ) $ew = " style=\"width:100%\"";
 523                 else $ew = '';
 524
 525                 $q = 'action=submit';
 526                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
 527                 $action = $this->mTitle->escapeLocalURL( $q );
 528
 529                 $summary = wfMsg('summary');
 530                 $subject = wfMsg('subject');
 531                 $minor   = wfMsg('minoredit');
 532                 $watchthis = wfMsg ('watchthis');
 533                 $save = wfMsg('savearticle');
 534                 $prev = wfMsg('showpreview');
 535                 $diff = wfMsg('showdiff');
 536
 537                 $cancel = $sk->makeKnownLink( $this->mTitle->getPrefixedText(),
 538                                 wfMsg('cancel') );
 539                 $edithelpurl = $sk->makeInternalOrExternalUrl( wfMsg( 'edithelppage' ));
 540                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
 541                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
 542                         htmlspecialchars( wfMsg( 'newwindow' ) );
 543
 544                 global $wgRightsText;
 545                 $copywarn = "<div id=\"editpage-copywarn\">\n" .
 546                         wfMsg( $wgRightsText ? 'copyrightwarning' : 'copyrightwarning2',
 547                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
 548                                 $wgRightsText ) . "\n</div>";
 549
 550                 if( $wgUser->getOption('showtoolbar') and !$isCssJsSubpage ) {
 551                         # prepare toolbar for edit buttons
 552                         $toolbar = $this->getEditToolbar();
 553                 } else {
 554                         $toolbar = '';
 555                 }
 556
 557                 // activate checkboxes if user wants them to be always active
 558                 if( !$this->preview && !$this->diff ) {
 559                         if( $wgUser->getOption( 'watchdefault' ) ) $this->watchthis = true;
 560                         if( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
 561
 562                         // activate checkbox also if user is already watching the page,
 563                         // require wpWatchthis to be unset so that second condition is not
 564                         // checked unnecessarily
 565                         if( !$this->watchthis && $this->mTitle->userIsWatching() ) $this->watchthis = true;
 566                 }
 567
 568                 $minoredithtml = '';
 569
 570                 if ( $wgUser->isLoggedIn() || $wgAllowAnonymousMinor ) {
 571                         $minoredithtml =
 572                                 "<input tabindex='3' type='checkbox' value='1' name='wpMinoredit'".($this->minoredit?" checked='checked'":"").
 573                                 " accesskey='".wfMsg('accesskey-minoredit')."' id='wpMinoredit' />".
 574                                 "<label for='wpMinoredit' title='".wfMsg('tooltip-minoredit')."'>{$minor}</label>";
 575                 }
 576
 577                 $watchhtml = '';
 578
 579                 if ( $wgUser->isLoggedIn() ) {
 580                         $watchhtml = "<input tabindex='4' type='checkbox' name='wpWatchthis'".($this->watchthis?" checked='checked'":"").
 581                                 " accesskey='".wfMsg('accesskey-watch')."' id='wpWatchthis'  />".
 582                                 "<label for='wpWatchthis' title='".wfMsg('tooltip-watch')."'>{$watchthis}</label>";
 583                 }
 584
 585                 $checkboxhtml = $minoredithtml . $watchhtml . '<br />';
 586
 587                 $wgOut->addHTML( '<div id="wikiPreview">' );
 588                 if ( 'preview' == $formtype) {
 589                         $previewOutput = $this->getPreviewText( $isConflict, $isCssJsSubpage );
 590                         if ( $wgUser->getOption('previewontop' ) ) {
 591                                 $wgOut->addHTML( $previewOutput );
 592                                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
 593                                         $this->mArticle->closeShowCategory();
 594                                 }
 595                                 $wgOut->addHTML( "<br style=\"clear:both;\" />\n" );
 596                         }
 597                 }
 598                 $wgOut->addHTML( '</div>' );
 599                 if ( 'diff' == $formtype ) {
 600                         if ( $wgUser->getOption('previewontop' ) ) {
 601                                 $wgOut->addHTML( $this->getDiff() );
 602                         }
 603                 }
 604
 605
 606                 # if this is a comment, show a subject line at the top, which is also the edit summary.
 607                 # Otherwise, show a summary field at the bottom
 608                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
 609                         if( $this->section == 'new' ) {
 610                                 $commentsubject="{$subject}: <input tabindex='1' type='text' value=\"$summarytext\" name=\"wpSummary\" maxlength='200' size='60' /><br />";
 611                                 $editsummary = '';
 612                         } else {
 613                                 $commentsubject = '';
 614                                 $editsummary="{$summary}: <input tabindex='2' type='text' value=\"$summarytext\" name=\"wpSummary\" maxlength='200' size='60' /><br />";
 615                         }
 616
 617                 if( !$this->preview && !$this->diff ) {
 618                 # Don't select the edit box on preview; this interferes with seeing what's going on.
 619                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
 620                 }
 621                 # Prepare a list of templates used by this page
 622                 $templates = '';
 623                 $articleTemplates = $this->mArticle->getUsedTemplates();
 624                 if ( count( $articleTemplates ) > 0 ) {
 625                         $templates = '<br />'. wfMsg( 'templatesused' ) . '<ul>';
 626                         foreach ( $articleTemplates as $tpl ) {
 627                                 if ( $titleObj = Title::makeTitle( NS_TEMPLATE, $tpl ) ) {
 628                                         $templates .= '<li>' . $sk->makeLinkObj( $titleObj ) . '</li>';
 629                                 }
 630                         }
 631                         $templates .= '</ul>';
 632                 }
 633
 634                 global $wgLivePreview, $wgStylePath;
 635                 /**
 636                  * Live Preview lets us fetch rendered preview page content and
 637                  * add it to the page without refreshing the whole page.
 638                  * Set up the button for it; if not supported by the browser
 639                  * it will fall through to the normal form submission method.
 640                  */
 641                 if( $wgLivePreview ) {
 642                         global $wgJsMimeType;
 643                         $wgOut->addHTML( '<script type="'.$wgJsMimeType.'" src="' .
 644                                 htmlspecialchars( $wgStylePath . '/common/preview.js' ) .
 645                                 '"></script>' . "\n" );
 646                         $liveAction = $wgTitle->getLocalUrl( 'action=submit&wpPreview=true&live=true' );
 647                         $liveOnclick = 'onclick="return !livePreview('.
 648                                 'getElementById(\'wikiPreview\'),' .
 649                                 'editform.wpTextbox1.value,' .
 650                                 htmlspecialchars( '"' . $liveAction . '"' ) . ')"';
 651                 } else {
 652                         $liveOnclick = '';
 653                 }
 654
 655                 global $wgUseMetadataEdit ;
 656                 if ( $wgUseMetadataEdit )
 657                 {
 658                         $metadata = $this->mMetaData ;
 659                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
 660                         $helppage = Title::newFromText ( wfmsg("metadata_page") ) ;
 661                         $top = str_replace ( "$1" , $helppage->getInternalURL() , wfmsg("metadata") ) ;
 662                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
 663                 }
 664                 else $metadata = "" ;
 665
 666
 667                 $wgOut->addHTML( <<<END
 668 {$toolbar}
 669 <form id="editform" name="editform" method="post" action="$action"
 670 enctype="multipart/form-data">
 671 {$commentsubject}
 672 <textarea tabindex='1' accesskey="," name="wpTextbox1" rows='{$rows}'
 673 cols='{$cols}'{$ew}>
 674 END
 675 . htmlspecialchars( $wgContLang->recodeForEdit( $this->textbox1 ) ) .
 676 "
 677 </textarea>
 678 {$metadata}
 679 <br />{$editsummary}
 680 {$checkboxhtml}
 681 <input tabindex='5' id='wpSave' type='submit' value=\"{$save}\" name=\"wpSave\" accesskey=\"".wfMsg('accesskey-save')."\"".
 682 " title=\"".wfMsg('tooltip-save')."\"/>
 683 <input tabindex='6' id='wpPreview' type='submit' $liveOnclick value=\"{$prev}\" name=\"wpPreview\" accesskey=\"".wfMsg('accesskey-preview')."\"".
 684 " title=\"".wfMsg('tooltip-preview')."\"/>
 685 <input tabindex='7' id='wpDiff' type='submit' value=\"{$diff}\" name=\"wpDiff\" accesskey=\"".wfMsg('accesskey-diff')."\"".
 686 " title=\"".wfMsg('tooltip-diff')."\"/>
 687 <em>{$cancel}</em> | <em>{$edithelp}</em>{$templates}" );
 688                 $wgOut->addWikiText( $copywarn );
 689                 $wgOut->addHTML( "
 690 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
 691 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n" );
 692
 693                 if ( $wgUser->isLoggedIn() ) {
 694                         /**
 695                          * To make it harder for someone to slip a user a page
 696                          * which submits an edit form to the wiki without their
 697                          * knowledge, a random token is associated with the login
 698                          * session. If it's not passed back with the submission,
 699                          * we won't save the page, or render user JavaScript and
 700                          * CSS previews.
 701                          */
 702                         $token = htmlspecialchars( $wgUser->editToken() );
 703                         $wgOut->addHTML( "
 704 <input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
 705                 }
 706
 707
 708                 if ( $isConflict ) {
 709                         require_once( "DifferenceEngine.php" );
 710                         $wgOut->addWikiText( '==' . wfMsg( "yourdiff" ) . '==' );
 711                         DifferenceEngine::showDiff( $this->textbox2, $this->textbox1,
 712                           wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
 713
 714                         $wgOut->addWikiText( '==' . wfMsg( "yourtext" ) . '==' );
 715                         $wgOut->addHTML( "<textarea tabindex=6 id='wpTextbox2' name=\"wpTextbox2\" rows='{$rows}' cols='{$cols}' wrap='virtual'>"
 716 . htmlspecialchars( $wgContLang->recodeForEdit( $this->textbox2 ) ) .
 717 "
 718 </textarea>" );
 719                 }
 720                 $wgOut->addHTML( "</form>\n" );
 721                 if ( $formtype == 'preview' && !$wgUser->getOption( 'previewontop' ) ) {
 722                         $wgOut->addHTML( '<div id="wikiPreview">' . $previewOutput . '</div>' );
 723                 }
 724                 if ( $formtype == 'diff' && !$wgUser->getOption( 'previewontop' ) ) {
 725                         #$wgOut->addHTML( '<div id="wikiPreview">' . $difftext . '</div>' );
 726                         $wgOut->addHTML( $this->getDiff() );
 727                 }
 728         }
 729
 730         /**
 731          * @todo document
 732          */
 733         function getPreviewText( $isConflict, $isCssJsSubpage ) {
 734                 global $wgOut, $wgUser, $wgTitle, $wgParser, $wgAllowDiffPreview, $wgEnableDiffPreviewPreference;
 735                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
 736                         "<p class='previewnote'>" . htmlspecialchars( wfMsg( 'previewnote' ) ) . "</p>\n";
 737                 if ( $isConflict ) {
 738                         $previewhead.='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) .
 739                                 "</h2>\n";
 740                 }
 741
 742                 $parserOptions = ParserOptions::newFromUser( $wgUser );
 743                 $parserOptions->setEditSection( false );
 744
 745                 # don't parse user css/js, show message about preview
 746                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
 747
 748                 if ( $isCssJsSubpage ) {
 749                         if(preg_match("/\\.css$/", $wgTitle->getText() ) ) {
 750                                 $previewtext = wfMsg('usercsspreview');
 751                         } else if(preg_match("/\\.js$/", $wgTitle->getText() ) ) {
 752                                 $previewtext = wfMsg('userjspreview');
 753                         }
 754                         $parserOutput = $wgParser->parse( $previewtext , $wgTitle, $parserOptions );
 755                         $wgOut->addHTML( $parserOutput->mText );
 756                         return $previewhead;
 757                 } else {
 758                         # if user want to see preview when he edit an article
 759                         if( $wgUser->getOption('previewonfirst') and ($this->textbox1 == '')) {
 760                                 $this->textbox1 = $this->mArticle->getContent(true);
 761                         }
 762
 763                         $toparse = $this->textbox1 ;
 764                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData ;
 765
 766                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ) ."\n\n",
 767                                         $wgTitle, $parserOptions );
 768
 769                         $previewHTML = $parserOutput->mText;
 770
 771                         $wgOut->addCategoryLinks($parserOutput->getCategoryLinks());
 772                         $wgOut->addLanguageLinks($parserOutput->getLanguageLinks());
 773                         return $previewhead . $previewHTML;
 774                 }
 775         }
 776
 777         /**
 778          * @todo document
 779          */
 780         function blockedIPpage() {
 781                 global $wgOut, $wgUser, $wgContLang, $wgIP;
 782
 783                 $wgOut->setPageTitle( wfMsg( 'blockedtitle' ) );
 784                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 785                 $wgOut->setArticleRelated( false );
 786
 787                 $id = $wgUser->blockedBy();
 788                 $reason = $wgUser->blockedFor();
 789                 $ip = $wgIP;
 790
 791                 if ( is_numeric( $id ) ) {
 792                         $name = User::whoIs( $id );
 793                 } else {
 794                         $name = $id;
 795                 }
 796                 $link = '[[' . $wgContLang->getNsText( NS_USER ) .
 797                   ":{$name}|{$name}]]";
 798
 799                 $wgOut->addWikiText( wfMsg( 'blockedtext', $link, $reason, $ip, $name ) );
 800                 $wgOut->returnToMain( false );
 801         }
 802
 803         /**
 804          * @todo document
 805          */
 806         function userNotLoggedInPage() {
 807                 global $wgOut;
 808
 809                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
 810                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 811                 $wgOut->setArticleRelated( false );
 812
 813                 $wgOut->addWikiText( wfMsg( 'whitelistedittext' ) );
 814                 $wgOut->returnToMain( false );
 815         }
 816
 817         /**
 818          * @todo document
 819          */
 820         function spamPage ( $match = false )
 821         {
 822                 global $wgOut;
 823                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
 824                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 825                 $wgOut->setArticleRelated( false );
 826
 827                 $wgOut->addWikiText( wfMsg( 'spamprotectiontext' ) );
 828                 if ( $match ) {
 829                         $wgOut->addWikiText( wfMsg( 'spamprotectionmatch', "<nowiki>{$match}</nowiki>" ) );
 830                 }
 831                 $wgOut->returnToMain( false );
 832         }
 833
 834         /**
 835          * Forks processes to scan the originating IP for an open proxy server
 836          * MemCached can be used to skip IPs that have already been scanned
 837          */
 838         function proxyCheck() {
 839                 global $wgBlockOpenProxies, $wgProxyPorts, $wgProxyScriptPath;
 840                 global $wgIP, $wgUseMemCached, $wgMemc, $wgDBname, $wgProxyMemcExpiry;
 841
 842                 if ( !$wgBlockOpenProxies ) {
 843                         return;
 844                 }
 845
 846                 # Get MemCached key
 847                 $skip = false;
 848                 if ( $wgUseMemCached ) {
 849                         $mcKey = $wgDBname.':proxy:ip:'.$wgIP;
 850                         $mcValue = $wgMemc->get( $mcKey );
 851                         if ( $mcValue ) {
 852                                 $skip = true;
 853                         }
 854                 }
 855
 856                 # Fork the processes
 857                 if ( !$skip ) {
 858                         $title = Title::makeTitle( NS_SPECIAL, 'Blockme' );
 859                         $iphash = md5( $wgIP . $wgProxyKey );
 860                         $url = $title->getFullURL( 'ip='.$iphash );
 861
 862                         foreach ( $wgProxyPorts as $port ) {
 863                                 $params = implode( ' ', array(
 864                                                         escapeshellarg( $wgProxyScriptPath ),
 865                                                         escapeshellarg( $wgIP ),
 866                                                         escapeshellarg( $port ),
 867                                                         escapeshellarg( $url )
 868                                                         ));
 869                                 exec( "php $params &>/dev/null &" );
 870                         }
 871                         # Set MemCached key
 872                         if ( $wgUseMemCached ) {
 873                                 $wgMemc->set( $mcKey, 1, $wgProxyMemcExpiry );
 874                         }
 875                 }
 876         }
 877
 878         /**
 879          * @access private
 880          * @todo document
 881          */
 882         function mergeChangesInto( &$editText ){
 883                 $db =& wfGetDB( DB_MASTER );
 884
 885                 // This is the revision the editor started from
 886                 $baseRevision = Revision::loadFromTimestamp(
 887                         $db, $this->mArticle->mTitle, $this->edittime );
 888                 if( is_null( $baseRevision ) ) {
 889                         return false;
 890                 }
 891                 $baseText = $baseRevision->getText();
 892
 893                 // The current state, we want to merge updates into it
 894                 $currentRevision =  Revision::loadFromTitle(
 895                         $db, $this->mArticle->mTitle );
 896                 if( is_null( $currentRevision ) ) {
 897                         return false;
 898                 }
 899                 $currentText = $currentRevision->getText();
 900
 901                 if( wfMerge( $baseText, $editText, $currentText, $result ) ){
 902                         $editText = $result;
 903                         return true;
 904                 } else {
 905                         return false;
 906                 }
 907         }
 908
 909
 910         function checkUnicodeCompliantBrowser() {
 911                 global $wgBrowserBlackList;
 912                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
 913                 foreach ( $wgBrowserBlackList as $browser ) {
 914                         if ( preg_match($browser, $currentbrowser) ) {
 915                                 return false;
 916                         }
 917                 }
 918                 return true;
 919         }
 920
 921         /**
 922          * Format an anchor fragment as it would appear for a given section name
 923          * @param string $text
 924          * @return string
 925          * @access private
 926          */
 927         function sectionAnchor( $text ) {
 928                 $headline = Sanitizer::decodeCharReferences( $text );
 929                 # strip out HTML
 930                 $headline = preg_replace( '/<.*?' . '>/', '', $headline );
 931                 $headline = trim( $headline );
 932                 $sectionanchor = '#' . urlencode( str_replace( ' ', '_', $headline ) );
 933                 $replacearray = array(
 934                         '%3A' => ':',
 935                         '%' => '.'
 936                 );
 937                 return str_replace(
 938                         array_keys( $replacearray ),
 939                         array_values( $replacearray ),
 940                         $sectionanchor );
 941         }
 942
 943         /**
 944          * Shows a bulletin board style toolbar for common editing functions.
 945          * It can be disabled in the user preferences.
 946          * The necessary JavaScript code can be found in style/wikibits.js.
 947          */
 948         function getEditToolbar() {
 949                 global $wgStylePath, $wgLang, $wgMimeType, $wgJsMimeType;
 950
 951                 /**
 952                  * toolarray an array of arrays which each include the filename of
 953                  * the button image (without path), the opening tag, the closing tag,
 954                  * and optionally a sample text that is inserted between the two when no
 955                  * selection is highlighted.
 956                  * The tip text is shown when the user moves the mouse over the button.
 957                  *
 958                  * Already here are accesskeys (key), which are not used yet until someone
 959                  * can figure out a way to make them work in IE. However, we should make
 960                  * sure these keys are not defined on the edit page.
 961                  */
 962                 $toolarray=array(
 963                         array(  'image'=>'button_bold.png',
 964                                         'open'  =>      "\'\'\'",
 965                                         'close' =>      "\'\'\'",
 966                                         'sample'=>      wfMsg('bold_sample'),
 967                                         'tip'   =>      wfMsg('bold_tip'),
 968                                         'key'   =>      'B'
 969                                 ),
 970                         array(  'image'=>'button_italic.png',
 971                                         'open'  =>      "\'\'",
 972                                         'close' =>      "\'\'",
 973                                         'sample'=>      wfMsg('italic_sample'),
 974                                         'tip'   =>      wfMsg('italic_tip'),
 975                                         'key'   =>      'I'
 976                                 ),
 977                         array(  'image'=>'button_link.png',
 978                                         'open'  =>      '[[',
 979                                         'close' =>      ']]',
 980                                         'sample'=>      wfMsg('link_sample'),
 981                                         'tip'   =>      wfMsg('link_tip'),
 982                                         'key'   =>      'L'
 983                                 ),
 984                         array(  'image'=>'button_extlink.png',
 985                                         'open'  =>      '[',
 986                                         'close' =>      ']',
 987                                         'sample'=>      wfMsg('extlink_sample'),
 988                                         'tip'   =>      wfMsg('extlink_tip'),
 989                                         'key'   =>      'X'
 990                                 ),
 991                         array(  'image'=>'button_headline.png',
 992                                         'open'  =>      "\\n== ",
 993                                         'close' =>      " ==\\n",
 994                                         'sample'=>      wfMsg('headline_sample'),
 995                                         'tip'   =>      wfMsg('headline_tip'),
 996                                         'key'   =>      'H'
 997                                 ),
 998                         array(  'image'=>'button_image.png',
 999                                         'open'  =>      '[['.$wgLang->getNsText(NS_IMAGE).":",
1000                                         'close' =>      ']]',
1001                                         'sample'=>      wfMsg('image_sample'),
1002                                         'tip'   =>      wfMsg('image_tip'),
1003                                         'key'   =>      'D'
1004                                 ),
1005                         array(  'image' =>'button_media.png',
1006                                         'open'  =>      '[['.$wgLang->getNsText(NS_MEDIA).':',
1007                                         'close' =>      ']]',
1008                                         'sample'=>      wfMsg('media_sample'),
1009                                         'tip'   =>      wfMsg('media_tip'),
1010                                         'key'   =>      'M'
1011                                 ),
1012                         array(  'image' =>'button_math.png',
1013                                         'open'  =>      "\\<math\\>",
1014                                         'close' =>      "\\</math\\>",
1015                                         'sample'=>      wfMsg('math_sample'),
1016                                         'tip'   =>      wfMsg('math_tip'),
1017                                         'key'   =>      'C'
1018                                 ),
1019                         array(  'image' =>'button_nowiki.png',
1020                                         'open'  =>      "\\<nowiki\\>",
1021                                         'close' =>      "\\</nowiki\\>",
1022                                         'sample'=>      wfMsg('nowiki_sample'),
1023                                         'tip'   =>      wfMsg('nowiki_tip'),
1024                                         'key'   =>      'N'
1025                                 ),
1026                         array(  'image' =>'button_sig.png',
1027                                         'open'  =>      '--~~~~',
1028                                         'close' =>      '',
1029                                         'sample'=>      '',
1030                                         'tip'   =>      wfMsg('sig_tip'),
1031                                         'key'   =>      'Y'
1032                                 ),
1033                         array(  'image' =>'button_hr.png',
1034                                         'open'  =>      "\\n----\\n",
1035                                         'close' =>      '',
1036                                         'sample'=>      '',
1037                                         'tip'   =>      wfMsg('hr_tip'),
1038                                         'key'   =>      'R'
1039                                 )
1040                 );
1041                 $toolbar ="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
1042
1043                 $toolbar.="document.writeln(\"<div id='toolbar'>\");\n";
1044                 foreach($toolarray as $tool) {
1045
1046                         $image=$wgStylePath.'/common/images/'.$tool['image'];
1047                         $open=$tool['open'];
1048                         $close=$tool['close'];
1049                         $sample = wfEscapeJsString( $tool['sample'] );
1050
1051                         // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
1052                         // Older browsers show a "speedtip" type message only for ALT.
1053                         // Ideally these should be different, realistically they
1054                         // probably don't need to be.
1055                         $tip = wfEscapeJsString( $tool['tip'] );
1056
1057                         #$key = $tool["key"];
1058
1059                         $toolbar.="addButton('$image','$tip','$open','$close','$sample');\n";
1060                 }
1061
1062                 $toolbar.="addInfobox('" . wfEscapeJsString( wfMsg( "infobox" ) ) .
1063                         "','" . wfEscapeJsString( wfMsg( "infobox_alert" ) ) . "');\n";
1064                 $toolbar.="document.writeln(\"</div>\");\n";
1065
1066                 $toolbar.="/*]]>*/\n</script>";
1067                 return $toolbar;
1068         }
1069
1070         /**
1071          * Output preview text only. This can be sucked into the edit page
1072          * via JavaScript, and saves the server time rendering the skin as
1073          * well as theoretically being more robust on the client (doesn't
1074          * disturb the edit box's undo history, won't eat your text on
1075          * failure, etc).
1076          *
1077          * @todo This doesn't include category or interlanguage links.
1078          *       Would need to enhance it a bit, maybe wrap them in XML
1079          *       or something... that might also require more skin
1080          *       initialization, so check whether that's a problem.
1081          */
1082         function livePreview() {
1083                 global $wgOut;
1084                 $wgOut->disable();
1085                 header( 'Content-type: text/xml' );
1086                 header( 'Cache-control: no-cache' );
1087                 # FIXME
1088                 echo $this->getPreviewText( false, false );
1089         }
1090
1091
1092         /**
1093          * Get a diff between the current contents of the edit box and the
1094          * version of the page we're editing from.
1095          *
1096          * If this is a section edit, we'll replace the section as for final
1097          * save and then make a comparison.
1098          *
1099          * @return string HTML
1100          */
1101         function getDiff() {
1102                 require_once( 'DifferenceEngine.php' );
1103                 $oldtext = $this->mArticle->getContent( true );
1104                 $newtext = $this->mArticle->getTextOfLastEditWithSectionReplacedOrAdded(
1105                         $this->section, $this->textbox1, $this->summary, $this->edittime );
1106                 $oldtitle = wfMsg( 'currentrev' );
1107                 $newtitle = wfMsg( 'yourtext' );
1108                 if ( $oldtext != wfMsg( 'noarticletext' ) || $newtext != '' ) {
1109                         $difftext = DifferenceEngine::getDiff( $oldtext, $newtext, $oldtitle, $newtitle );
1110                 }
1111
1112                 return '<div id="wikiDiff">' . $difftext . '</div>';
1113         }
1114
1115 }
1116
1117 ?>