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 ( isset( $this->mArticle )
 499                              && isset( $this->mArticle->mRevision )
 500                              && !$this->mArticle->mRevision->isCurrent() ) {
 501                                 $this->mArticle->setOldSubtitle();
 502                                 $wgOut->addWikiText( wfMsg( 'editingold' ) );
 503                         }
 504                 }
 505
 506                 if( wfReadOnly() ) {
 507                         $wgOut->addWikiText( wfMsg( 'readonlywarning' ) );
 508                 } else if ( $isCssJsSubpage and 'preview' != $formtype) {
 509                         $wgOut->addWikiText( wfMsg( 'usercssjsyoucanpreview' ));
 510                 }
 511                 if( $this->mTitle->isProtected('edit') ) {
 512                         $wgOut->addWikiText( wfMsg( 'protectedpagewarning' ) );
 513                 }
 514
 515                 $kblength = (int)(strlen( $this->textbox1 ) / 1024);
 516                 if( $kblength > 29 ) {
 517                         $wgOut->addWikiText( wfMsg( 'longpagewarning', $wgLang->formatNum( $kblength ) ) );
 518                 }
 519
 520                 $rows = $wgUser->getOption( 'rows' );
 521                 $cols = $wgUser->getOption( 'cols' );
 522
 523                 $ew = $wgUser->getOption( 'editwidth' );
 524                 if ( $ew ) $ew = " style=\"width:100%\"";
 525                 else $ew = '';
 526
 527                 $q = 'action=submit';
 528                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
 529                 $action = $this->mTitle->escapeLocalURL( $q );
 530
 531                 $summary = wfMsg('summary');
 532                 $subject = wfMsg('subject');
 533                 $minor   = wfMsg('minoredit');
 534                 $watchthis = wfMsg ('watchthis');
 535                 $save = wfMsg('savearticle');
 536                 $prev = wfMsg('showpreview');
 537                 $diff = wfMsg('showdiff');
 538
 539                 $cancel = $sk->makeKnownLink( $this->mTitle->getPrefixedText(),
 540                                 wfMsg('cancel') );
 541                 $edithelpurl = $sk->makeInternalOrExternalUrl( wfMsg( 'edithelppage' ));
 542                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
 543                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
 544                         htmlspecialchars( wfMsg( 'newwindow' ) );
 545
 546                 global $wgRightsText;
 547                 $copywarn = "<div id=\"editpage-copywarn\">\n" .
 548                         wfMsg( $wgRightsText ? 'copyrightwarning' : 'copyrightwarning2',
 549                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
 550                                 $wgRightsText ) . "\n</div>";
 551
 552                 if( $wgUser->getOption('showtoolbar') and !$isCssJsSubpage ) {
 553                         # prepare toolbar for edit buttons
 554                         $toolbar = $this->getEditToolbar();
 555                 } else {
 556                         $toolbar = '';
 557                 }
 558
 559                 // activate checkboxes if user wants them to be always active
 560                 if( !$this->preview && !$this->diff ) {
 561                         if( $wgUser->getOption( 'watchdefault' ) ) $this->watchthis = true;
 562                         if( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
 563
 564                         // activate checkbox also if user is already watching the page,
 565                         // require wpWatchthis to be unset so that second condition is not
 566                         // checked unnecessarily
 567                         if( !$this->watchthis && $this->mTitle->userIsWatching() ) $this->watchthis = true;
 568                 }
 569
 570                 $minoredithtml = '';
 571
 572                 if ( $wgUser->isLoggedIn() || $wgAllowAnonymousMinor ) {
 573                         $minoredithtml =
 574                                 "<input tabindex='3' type='checkbox' value='1' name='wpMinoredit'".($this->minoredit?" checked='checked'":"").
 575                                 " accesskey='".wfMsg('accesskey-minoredit')."' id='wpMinoredit' />".
 576                                 "<label for='wpMinoredit' title='".wfMsg('tooltip-minoredit')."'>{$minor}</label>";
 577                 }
 578
 579                 $watchhtml = '';
 580
 581                 if ( $wgUser->isLoggedIn() ) {
 582                         $watchhtml = "<input tabindex='4' type='checkbox' name='wpWatchthis'".($this->watchthis?" checked='checked'":"").
 583                                 " accesskey='".wfMsg('accesskey-watch')."' id='wpWatchthis'  />".
 584                                 "<label for='wpWatchthis' title='".wfMsg('tooltip-watch')."'>{$watchthis}</label>";
 585                 }
 586
 587                 $checkboxhtml = $minoredithtml . $watchhtml . '<br />';
 588
 589                 $wgOut->addHTML( '<div id="wikiPreview">' );
 590                 if ( 'preview' == $formtype) {
 591                         $previewOutput = $this->getPreviewText( $isConflict, $isCssJsSubpage );
 592                         if ( $wgUser->getOption('previewontop' ) ) {
 593                                 $wgOut->addHTML( $previewOutput );
 594                                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
 595                                         $this->mArticle->closeShowCategory();
 596                                 }
 597                                 $wgOut->addHTML( "<br style=\"clear:both;\" />\n" );
 598                         }
 599                 }
 600                 $wgOut->addHTML( '</div>' );
 601                 if ( 'diff' == $formtype ) {
 602                         if ( $wgUser->getOption('previewontop' ) ) {
 603                                 $wgOut->addHTML( $this->getDiff() );
 604                         }
 605                 }
 606
 607
 608                 # if this is a comment, show a subject line at the top, which is also the edit summary.
 609                 # Otherwise, show a summary field at the bottom
 610                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
 611                         if( $this->section == 'new' ) {
 612                                 $commentsubject="{$subject}: <input tabindex='1' type='text' value=\"$summarytext\" name=\"wpSummary\" maxlength='200' size='60' /><br />";
 613                                 $editsummary = '';
 614                         } else {
 615                                 $commentsubject = '';
 616                                 $editsummary="{$summary}: <input tabindex='2' type='text' value=\"$summarytext\" name=\"wpSummary\" maxlength='200' size='60' /><br />";
 617                         }
 618
 619                 if( !$this->preview && !$this->diff ) {
 620                 # Don't select the edit box on preview; this interferes with seeing what's going on.
 621                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
 622                 }
 623                 # Prepare a list of templates used by this page
 624                 $templates = '';
 625                 $articleTemplates = $this->mArticle->getUsedTemplates();
 626                 if ( count( $articleTemplates ) > 0 ) {
 627                         $templates = '<br />'. wfMsg( 'templatesused' ) . '<ul>';
 628                         foreach ( $articleTemplates as $tpl ) {
 629                                 if ( $titleObj = Title::makeTitle( NS_TEMPLATE, $tpl ) ) {
 630                                         $templates .= '<li>' . $sk->makeLinkObj( $titleObj ) . '</li>';
 631                                 }
 632                         }
 633                         $templates .= '</ul>';
 634                 }
 635
 636                 global $wgLivePreview, $wgStylePath;
 637                 /**
 638                  * Live Preview lets us fetch rendered preview page content and
 639                  * add it to the page without refreshing the whole page.
 640                  * Set up the button for it; if not supported by the browser
 641                  * it will fall through to the normal form submission method.
 642                  */
 643                 if( $wgLivePreview ) {
 644                         global $wgJsMimeType;
 645                         $wgOut->addHTML( '<script type="'.$wgJsMimeType.'" src="' .
 646                                 htmlspecialchars( $wgStylePath . '/common/preview.js' ) .
 647                                 '"></script>' . "\n" );
 648                         $liveAction = $wgTitle->getLocalUrl( 'action=submit&wpPreview=true&live=true' );
 649                         $liveOnclick = 'onclick="return !livePreview('.
 650                                 'getElementById(\'wikiPreview\'),' .
 651                                 'editform.wpTextbox1.value,' .
 652                                 htmlspecialchars( '"' . $liveAction . '"' ) . ')"';
 653                 } else {
 654                         $liveOnclick = '';
 655                 }
 656
 657                 global $wgUseMetadataEdit ;
 658                 if ( $wgUseMetadataEdit )
 659                 {
 660                         $metadata = $this->mMetaData ;
 661                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
 662                         $helppage = Title::newFromText ( wfmsg("metadata_page") ) ;
 663                         $top = str_replace ( "$1" , $helppage->getInternalURL() , wfmsg("metadata") ) ;
 664                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
 665                 }
 666                 else $metadata = "" ;
 667
 668
 669                 $wgOut->addHTML( <<<END
 670 {$toolbar}
 671 <form id="editform" name="editform" method="post" action="$action"
 672 enctype="multipart/form-data">
 673 {$commentsubject}
 674 <textarea tabindex='1' accesskey="," name="wpTextbox1" rows='{$rows}'
 675 cols='{$cols}'{$ew}>
 676 END
 677 . htmlspecialchars( $wgContLang->recodeForEdit( $this->textbox1 ) ) .
 678 "
 679 </textarea>
 680 {$metadata}
 681 <br />{$editsummary}
 682 {$checkboxhtml}
 683 <input tabindex='5' id='wpSave' type='submit' value=\"{$save}\" name=\"wpSave\" accesskey=\"".wfMsg('accesskey-save')."\"".
 684 " title=\"".wfMsg('tooltip-save')."\"/>
 685 <input tabindex='6' id='wpPreview' type='submit' $liveOnclick value=\"{$prev}\" name=\"wpPreview\" accesskey=\"".wfMsg('accesskey-preview')."\"".
 686 " title=\"".wfMsg('tooltip-preview')."\"/>
 687 <input tabindex='7' id='wpDiff' type='submit' value=\"{$diff}\" name=\"wpDiff\" accesskey=\"".wfMsg('accesskey-diff')."\"".
 688 " title=\"".wfMsg('tooltip-diff')."\"/>
 689 <em>{$cancel}</em> | <em>{$edithelp}</em>{$templates}" );
 690                 $wgOut->addWikiText( $copywarn );
 691                 $wgOut->addHTML( "
 692 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
 693 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n" );
 694
 695                 if ( $wgUser->isLoggedIn() ) {
 696                         /**
 697                          * To make it harder for someone to slip a user a page
 698                          * which submits an edit form to the wiki without their
 699                          * knowledge, a random token is associated with the login
 700                          * session. If it's not passed back with the submission,
 701                          * we won't save the page, or render user JavaScript and
 702                          * CSS previews.
 703                          */
 704                         $token = htmlspecialchars( $wgUser->editToken() );
 705                         $wgOut->addHTML( "
 706 <input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
 707                 }
 708
 709
 710                 if ( $isConflict ) {
 711                         require_once( "DifferenceEngine.php" );
 712                         $wgOut->addWikiText( '==' . wfMsg( "yourdiff" ) . '==' );
 713                         DifferenceEngine::showDiff( $this->textbox2, $this->textbox1,
 714                           wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
 715
 716                         $wgOut->addWikiText( '==' . wfMsg( "yourtext" ) . '==' );
 717                         $wgOut->addHTML( "<textarea tabindex=6 id='wpTextbox2' name=\"wpTextbox2\" rows='{$rows}' cols='{$cols}' wrap='virtual'>"
 718 . htmlspecialchars( $wgContLang->recodeForEdit( $this->textbox2 ) ) .
 719 "
 720 </textarea>" );
 721                 }
 722                 $wgOut->addHTML( "</form>\n" );
 723                 if ( $formtype == 'preview' && !$wgUser->getOption( 'previewontop' ) ) {
 724                         $wgOut->addHTML( '<div id="wikiPreview">' . $previewOutput . '</div>' );
 725                 }
 726                 if ( $formtype == 'diff' && !$wgUser->getOption( 'previewontop' ) ) {
 727                         #$wgOut->addHTML( '<div id="wikiPreview">' . $difftext . '</div>' );
 728                         $wgOut->addHTML( $this->getDiff() );
 729                 }
 730         }
 731
 732         /**
 733          * @todo document
 734          */
 735         function getPreviewText( $isConflict, $isCssJsSubpage ) {
 736                 global $wgOut, $wgUser, $wgTitle, $wgParser, $wgAllowDiffPreview, $wgEnableDiffPreviewPreference;
 737                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
 738                         "<p class='previewnote'>" . htmlspecialchars( wfMsg( 'previewnote' ) ) . "</p>\n";
 739                 if ( $isConflict ) {
 740                         $previewhead.='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) .
 741                                 "</h2>\n";
 742                 }
 743
 744                 $parserOptions = ParserOptions::newFromUser( $wgUser );
 745                 $parserOptions->setEditSection( false );
 746
 747                 # don't parse user css/js, show message about preview
 748                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
 749
 750                 if ( $isCssJsSubpage ) {
 751                         if(preg_match("/\\.css$/", $wgTitle->getText() ) ) {
 752                                 $previewtext = wfMsg('usercsspreview');
 753                         } else if(preg_match("/\\.js$/", $wgTitle->getText() ) ) {
 754                                 $previewtext = wfMsg('userjspreview');
 755                         }
 756                         $parserOutput = $wgParser->parse( $previewtext , $wgTitle, $parserOptions );
 757                         $wgOut->addHTML( $parserOutput->mText );
 758                         return $previewhead;
 759                 } else {
 760                         # if user want to see preview when he edit an article
 761                         if( $wgUser->getOption('previewonfirst') and ($this->textbox1 == '')) {
 762                                 $this->textbox1 = $this->mArticle->getContent(true);
 763                         }
 764
 765                         $toparse = $this->textbox1 ;
 766                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData ;
 767
 768                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ) ."\n\n",
 769                                         $wgTitle, $parserOptions );
 770
 771                         $previewHTML = $parserOutput->mText;
 772
 773                         $wgOut->addCategoryLinks($parserOutput->getCategoryLinks());
 774                         $wgOut->addLanguageLinks($parserOutput->getLanguageLinks());
 775                         return $previewhead . $previewHTML;
 776                 }
 777         }
 778
 779         /**
 780          * @todo document
 781          */
 782         function blockedIPpage() {
 783                 global $wgOut, $wgUser, $wgContLang, $wgIP;
 784
 785                 $wgOut->setPageTitle( wfMsg( 'blockedtitle' ) );
 786                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 787                 $wgOut->setArticleRelated( false );
 788
 789                 $id = $wgUser->blockedBy();
 790                 $reason = $wgUser->blockedFor();
 791                 $ip = $wgIP;
 792
 793                 if ( is_numeric( $id ) ) {
 794                         $name = User::whoIs( $id );
 795                 } else {
 796                         $name = $id;
 797                 }
 798                 $link = '[[' . $wgContLang->getNsText( NS_USER ) .
 799                   ":{$name}|{$name}]]";
 800
 801                 $wgOut->addWikiText( wfMsg( 'blockedtext', $link, $reason, $ip, $name ) );
 802                 $wgOut->returnToMain( false );
 803         }
 804
 805         /**
 806          * @todo document
 807          */
 808         function userNotLoggedInPage() {
 809                 global $wgOut;
 810
 811                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
 812                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 813                 $wgOut->setArticleRelated( false );
 814
 815                 $wgOut->addWikiText( wfMsg( 'whitelistedittext' ) );
 816                 $wgOut->returnToMain( false );
 817         }
 818
 819         /**
 820          * @todo document
 821          */
 822         function spamPage ( $match = false )
 823         {
 824                 global $wgOut;
 825                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
 826                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 827                 $wgOut->setArticleRelated( false );
 828
 829                 $wgOut->addWikiText( wfMsg( 'spamprotectiontext' ) );
 830                 if ( $match ) {
 831                         $wgOut->addWikiText( wfMsg( 'spamprotectionmatch', "<nowiki>{$match}</nowiki>" ) );
 832                 }
 833                 $wgOut->returnToMain( false );
 834         }
 835
 836         /**
 837          * Forks processes to scan the originating IP for an open proxy server
 838          * MemCached can be used to skip IPs that have already been scanned
 839          */
 840         function proxyCheck() {
 841                 global $wgBlockOpenProxies, $wgProxyPorts, $wgProxyScriptPath;
 842                 global $wgIP, $wgUseMemCached, $wgMemc, $wgDBname, $wgProxyMemcExpiry;
 843
 844                 if ( !$wgBlockOpenProxies ) {
 845                         return;
 846                 }
 847
 848                 # Get MemCached key
 849                 $skip = false;
 850                 if ( $wgUseMemCached ) {
 851                         $mcKey = $wgDBname.':proxy:ip:'.$wgIP;
 852                         $mcValue = $wgMemc->get( $mcKey );
 853                         if ( $mcValue ) {
 854                                 $skip = true;
 855                         }
 856                 }
 857
 858                 # Fork the processes
 859                 if ( !$skip ) {
 860                         $title = Title::makeTitle( NS_SPECIAL, 'Blockme' );
 861                         $iphash = md5( $wgIP . $wgProxyKey );
 862                         $url = $title->getFullURL( 'ip='.$iphash );
 863
 864                         foreach ( $wgProxyPorts as $port ) {
 865                                 $params = implode( ' ', array(
 866                                                         escapeshellarg( $wgProxyScriptPath ),
 867                                                         escapeshellarg( $wgIP ),
 868                                                         escapeshellarg( $port ),
 869                                                         escapeshellarg( $url )
 870                                                         ));
 871                                 exec( "php $params &>/dev/null &" );
 872                         }
 873                         # Set MemCached key
 874                         if ( $wgUseMemCached ) {
 875                                 $wgMemc->set( $mcKey, 1, $wgProxyMemcExpiry );
 876                         }
 877                 }
 878         }
 879
 880         /**
 881          * @access private
 882          * @todo document
 883          */
 884         function mergeChangesInto( &$editText ){
 885                 $db =& wfGetDB( DB_MASTER );
 886
 887                 // This is the revision the editor started from
 888                 $baseRevision = Revision::loadFromTimestamp(
 889                         $db, $this->mArticle->mTitle, $this->edittime );
 890                 if( is_null( $baseRevision ) ) {
 891                         return false;
 892                 }
 893                 $baseText = $baseRevision->getText();
 894
 895                 // The current state, we want to merge updates into it
 896                 $currentRevision =  Revision::loadFromTitle(
 897                         $db, $this->mArticle->mTitle );
 898                 if( is_null( $currentRevision ) ) {
 899                         return false;
 900                 }
 901                 $currentText = $currentRevision->getText();
 902
 903                 if( wfMerge( $baseText, $editText, $currentText, $result ) ){
 904                         $editText = $result;
 905                         return true;
 906                 } else {
 907                         return false;
 908                 }
 909         }
 910
 911
 912         function checkUnicodeCompliantBrowser() {
 913                 global $wgBrowserBlackList;
 914                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
 915                 foreach ( $wgBrowserBlackList as $browser ) {
 916                         if ( preg_match($browser, $currentbrowser) ) {
 917                                 return false;
 918                         }
 919                 }
 920                 return true;
 921         }
 922
 923         /**
 924          * Format an anchor fragment as it would appear for a given section name
 925          * @param string $text
 926          * @return string
 927          * @access private
 928          */
 929         function sectionAnchor( $text ) {
 930                 $headline = Sanitizer::decodeCharReferences( $text );
 931                 # strip out HTML
 932                 $headline = preg_replace( '/<.*?' . '>/', '', $headline );
 933                 $headline = trim( $headline );
 934                 $sectionanchor = '#' . urlencode( str_replace( ' ', '_', $headline ) );
 935                 $replacearray = array(
 936                         '%3A' => ':',
 937                         '%' => '.'
 938                 );
 939                 return str_replace(
 940                         array_keys( $replacearray ),
 941                         array_values( $replacearray ),
 942                         $sectionanchor );
 943         }
 944
 945         /**
 946          * Shows a bulletin board style toolbar for common editing functions.
 947          * It can be disabled in the user preferences.
 948          * The necessary JavaScript code can be found in style/wikibits.js.
 949          */
 950         function getEditToolbar() {
 951                 global $wgStylePath, $wgLang, $wgMimeType, $wgJsMimeType;
 952
 953                 /**
 954                  * toolarray an array of arrays which each include the filename of
 955                  * the button image (without path), the opening tag, the closing tag,
 956                  * and optionally a sample text that is inserted between the two when no
 957                  * selection is highlighted.
 958                  * The tip text is shown when the user moves the mouse over the button.
 959                  *
 960                  * Already here are accesskeys (key), which are not used yet until someone
 961                  * can figure out a way to make them work in IE. However, we should make
 962                  * sure these keys are not defined on the edit page.
 963                  */
 964                 $toolarray=array(
 965                         array(  'image'=>'button_bold.png',
 966                                         'open'  =>      "\'\'\'",
 967                                         'close' =>      "\'\'\'",
 968                                         'sample'=>      wfMsg('bold_sample'),
 969                                         'tip'   =>      wfMsg('bold_tip'),
 970                                         'key'   =>      'B'
 971                                 ),
 972                         array(  'image'=>'button_italic.png',
 973                                         'open'  =>      "\'\'",
 974                                         'close' =>      "\'\'",
 975                                         'sample'=>      wfMsg('italic_sample'),
 976                                         'tip'   =>      wfMsg('italic_tip'),
 977                                         'key'   =>      'I'
 978                                 ),
 979                         array(  'image'=>'button_link.png',
 980                                         'open'  =>      '[[',
 981                                         'close' =>      ']]',
 982                                         'sample'=>      wfMsg('link_sample'),
 983                                         'tip'   =>      wfMsg('link_tip'),
 984                                         'key'   =>      'L'
 985                                 ),
 986                         array(  'image'=>'button_extlink.png',
 987                                         'open'  =>      '[',
 988                                         'close' =>      ']',
 989                                         'sample'=>      wfMsg('extlink_sample'),
 990                                         'tip'   =>      wfMsg('extlink_tip'),
 991                                         'key'   =>      'X'
 992                                 ),
 993                         array(  'image'=>'button_headline.png',
 994                                         'open'  =>      "\\n== ",
 995                                         'close' =>      " ==\\n",
 996                                         'sample'=>      wfMsg('headline_sample'),
 997                                         'tip'   =>      wfMsg('headline_tip'),
 998                                         'key'   =>      'H'
 999                                 ),
1000                         array(  'image'=>'button_image.png',
1001                                         'open'  =>      '[['.$wgLang->getNsText(NS_IMAGE).":",
1002                                         'close' =>      ']]',
1003                                         'sample'=>      wfMsg('image_sample'),
1004                                         'tip'   =>      wfMsg('image_tip'),
1005                                         'key'   =>      'D'
1006                                 ),
1007                         array(  'image' =>'button_media.png',
1008                                         'open'  =>      '[['.$wgLang->getNsText(NS_MEDIA).':',
1009                                         'close' =>      ']]',
1010                                         'sample'=>      wfMsg('media_sample'),
1011                                         'tip'   =>      wfMsg('media_tip'),
1012                                         'key'   =>      'M'
1013                                 ),
1014                         array(  'image' =>'button_math.png',
1015                                         'open'  =>      "\\<math\\>",
1016                                         'close' =>      "\\</math\\>",
1017                                         'sample'=>      wfMsg('math_sample'),
1018                                         'tip'   =>      wfMsg('math_tip'),
1019                                         'key'   =>      'C'
1020                                 ),
1021                         array(  'image' =>'button_nowiki.png',
1022                                         'open'  =>      "\\<nowiki\\>",
1023                                         'close' =>      "\\</nowiki\\>",
1024                                         'sample'=>      wfMsg('nowiki_sample'),
1025                                         'tip'   =>      wfMsg('nowiki_tip'),
1026                                         'key'   =>      'N'
1027                                 ),
1028                         array(  'image' =>'button_sig.png',
1029                                         'open'  =>      '--~~~~',
1030                                         'close' =>      '',
1031                                         'sample'=>      '',
1032                                         'tip'   =>      wfMsg('sig_tip'),
1033                                         'key'   =>      'Y'
1034                                 ),
1035                         array(  'image' =>'button_hr.png',
1036                                         'open'  =>      "\\n----\\n",
1037                                         'close' =>      '',
1038                                         'sample'=>      '',
1039                                         'tip'   =>      wfMsg('hr_tip'),
1040                                         'key'   =>      'R'
1041                                 )
1042                 );
1043                 $toolbar ="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
1044
1045                 $toolbar.="document.writeln(\"<div id='toolbar'>\");\n";
1046                 foreach($toolarray as $tool) {
1047
1048                         $image=$wgStylePath.'/common/images/'.$tool['image'];
1049                         $open=$tool['open'];
1050                         $close=$tool['close'];
1051                         $sample = wfEscapeJsString( $tool['sample'] );
1052
1053                         // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
1054                         // Older browsers show a "speedtip" type message only for ALT.
1055                         // Ideally these should be different, realistically they
1056                         // probably don't need to be.
1057                         $tip = wfEscapeJsString( $tool['tip'] );
1058
1059                         #$key = $tool["key"];
1060
1061                         $toolbar.="addButton('$image','$tip','$open','$close','$sample');\n";
1062                 }
1063
1064                 $toolbar.="addInfobox('" . wfEscapeJsString( wfMsg( "infobox" ) ) .
1065                         "','" . wfEscapeJsString( wfMsg( "infobox_alert" ) ) . "');\n";
1066                 $toolbar.="document.writeln(\"</div>\");\n";
1067
1068                 $toolbar.="/*]]>*/\n</script>";
1069                 return $toolbar;
1070         }
1071
1072         /**
1073          * Output preview text only. This can be sucked into the edit page
1074          * via JavaScript, and saves the server time rendering the skin as
1075          * well as theoretically being more robust on the client (doesn't
1076          * disturb the edit box's undo history, won't eat your text on
1077          * failure, etc).
1078          *
1079          * @todo This doesn't include category or interlanguage links.
1080          *       Would need to enhance it a bit, maybe wrap them in XML
1081          *       or something... that might also require more skin
1082          *       initialization, so check whether that's a problem.
1083          */
1084         function livePreview() {
1085                 global $wgOut;
1086                 $wgOut->disable();
1087                 header( 'Content-type: text/xml' );
1088                 header( 'Cache-control: no-cache' );
1089                 # FIXME
1090                 echo $this->getPreviewText( false, false );
1091         }
1092
1093
1094         /**
1095          * Get a diff between the current contents of the edit box and the
1096          * version of the page we're editing from.
1097          *
1098          * If this is a section edit, we'll replace the section as for final
1099          * save and then make a comparison.
1100          *
1101          * @return string HTML
1102          */
1103         function getDiff() {
1104                 require_once( 'DifferenceEngine.php' );
1105                 $oldtext = $this->mArticle->fetchContent();
1106                 $newtext = $this->mArticle->getTextOfLastEditWithSectionReplacedOrAdded(
1107                         $this->section, $this->textbox1, $this->summary, $this->edittime );
1108                 $oldtitle = wfMsg( 'currentrev' );
1109                 $newtitle = wfMsg( 'yourtext' );
1110                 if ( $oldtext != wfMsg( 'noarticletext' ) || $newtext != '' ) {
1111                         $difftext = DifferenceEngine::getDiff( $oldtext, $newtext, $oldtitle, $newtitle );
1112                 }
1113
1114                 return '<div id="wikiDiff">' . $difftext . '</div>';
1115         }
1116
1117 }
1118
1119 ?>