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( $this->previewOnOpen() ) {
 185                                 $this->editForm( 'preview', true );
 186                         } else {
 187                                 $this->extractMetaDataFromArticle () ;
 188                                 $this->editForm( 'initial', true );
 189                         }
 190                 }
 191         }
 192
 193         /**
 194          * Return true if this page should be previewed when the edit form
 195          * is initially opened.
 196          * @return bool
 197          * @access private
 198          */
 199         function previewOnOpen() {
 200                 global $wgUser;
 201                 return $wgUser->getOption( 'previewonfirst' ) ||
 202                         ( $this->mTitle->getNamespace() == NS_CATEGORY &&
 203                                 !$this->mTitle->exists() );
 204         }
 205
 206         /**
 207          * @todo document
 208          */
 209         function importFormData( &$request ) {
 210                 if( $request->wasPosted() ) {
 211                         # These fields need to be checked for encoding.
 212                         # Also remove trailing whitespace, but don't remove _initial_
 213                         # whitespace from the text boxes. This may be significant formatting.
 214                         $this->textbox1  = rtrim( $request->getText( 'wpTextbox1' ) );
 215                         $this->textbox2  = rtrim( $request->getText( 'wpTextbox2' ) );
 216                         $this->mMetaData = rtrim( $request->getText( 'metadata'   ) );
 217                         $this->summary   =        $request->getText( 'wpSummary'  );
 218
 219                         $this->edittime = $request->getVal( 'wpEdittime' );
 220                         if( is_null( $this->edittime ) ) {
 221                                 # If the form is incomplete, force to preview.
 222                                 $this->preview  = true;
 223                         } else {
 224                                 if( $this->tokenOk( $request ) ) {
 225                                         # Some browsers will not report any submit button
 226                                         # if the user hits enter in the comment box.
 227                                         # The unmarked state will be assumed to be a save,
 228                                         # if the form seems otherwise complete.
 229                                         $this->preview = $request->getCheck( 'wpPreview' );
 230                                         $this->diff = $request->getCheck( 'wpDiff' );
 231                                 } else {
 232                                         # Page might be a hack attempt posted from
 233                                         # an external site. Preview instead of saving.
 234                                         $this->preview = true;
 235                                 }
 236                         }
 237                         $this->save    = ! ( $this->preview OR $this->diff );
 238                         if( !preg_match( '/^\d{14}$/', $this->edittime )) {
 239                                 $this->edittime = null;
 240                         }
 241
 242                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 243                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 244                 } else {
 245                         # Not a posted form? Start with nothing.
 246                         $this->textbox1  = '';
 247                         $this->textbox2  = '';
 248                         $this->mMetaData = '';
 249                         $this->summary   = '';
 250                         $this->edittime  = '';
 251                         $this->preview   = false;
 252                         $this->save      = false;
 253                         $this->diff      = false;
 254                         $this->minoredit = false;
 255                         $this->watchthis = false;
 256                 }
 257
 258                 $this->oldid = $request->getInt( 'oldid' );
 259
 260                 # Section edit can come from either the form or a link
 261                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 262
 263                 $this->live = $request->getCheck( 'live' );
 264         }
 265
 266         /**
 267          * Make sure the form isn't faking a user's credentials.
 268          *
 269          * @param WebRequest $request
 270          * @return bool
 271          * @access private
 272          */
 273         function tokenOk( &$request ) {
 274                 global $wgUser;
 275                 if( $wgUser->isAnon() ) {
 276                         # Anonymous users may not have a session
 277                         # open. Don't tokenize.
 278                         return true;
 279                 } else {
 280                         return $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
 281                 }
 282         }
 283
 284         function submit() {
 285                 $this->edit();
 286         }
 287
 288         /**
 289          * The edit form is self-submitting, so that when things like
 290          * preview and edit conflicts occur, we get the same form back
 291          * with the extra stuff added.  Only when the final submission
 292          * is made and all is well do we actually save and redirect to
 293          * the newly-edited page.
 294          *
 295          * @param string $formtype Type of form either : save, initial, diff or preview
 296          * @param bool $firsttime True to load form data from db
 297          */
 298         function editForm( $formtype, $firsttime = false ) {
 299                 global $wgOut, $wgUser;
 300                 global $wgLang, $wgContLang, $wgParser, $wgTitle;
 301                 global $wgAllowAnonymousMinor, $wgRequest;
 302                 global $wgSpamRegex, $wgFilterCallback;
 303
 304                 $sk = $wgUser->getSkin();
 305                 $isConflict = false;
 306                 // css / js subpages of user pages get a special treatment
 307                 $isCssJsSubpage = $wgTitle->isCssJsSubpage();
 308
 309
 310                 if(!$this->mTitle->getArticleID()) { # new article
 311                         $editintro = $wgRequest->getText( 'editintro' );
 312                         $addstandardintro=true;
 313                         if($editintro) {
 314                                 $introtitle=Title::newFromText($editintro);
 315                                 if(isset($introtitle) && $introtitle->userCanRead()) {
 316                                         $rev=Revision::newFromTitle($introtitle);
 317                                         if($rev) {
 318                                                 $wgOut->addWikiText($rev->getText());
 319                                                 $addstandardintro=false;
 320                                         }
 321                                 }
 322                         }
 323                         if($addstandardintro) {
 324                                 $wgOut->addWikiText(wfmsg('newarticletext'));
 325                         }
 326                 }
 327
 328                 if( $this->mTitle->isTalkPage() ) {
 329                         $wgOut->addWikiText(wfmsg('talkpagetext'));
 330                 }
 331
 332                 # Attempt submission here.  This will check for edit conflicts,
 333                 # and redundantly check for locked database, blocked IPs, etc.
 334                 # that edit() already checked just in case someone tries to sneak
 335                 # in the back door with a hand-edited submission URL.
 336
 337                 if ( 'save' == $formtype ) {
 338                         # Reintegrate metadata
 339                         if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 340                         $this->mMetaData = '' ;
 341
 342                         # Check for spam
 343                         if ( $wgSpamRegex && preg_match( $wgSpamRegex, $this->textbox1, $matches ) ) {
 344                                 $this->spamPage ( $matches[0] );
 345                                 return;
 346                         }
 347                         if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section ) ) {
 348                                 # Error messages or other handling should be performed by the filter function
 349                                 return;
 350                         }
 351                         if ( $wgUser->isBlocked( false ) ) {
 352                                 # Check block state against master, thus 'false'.
 353                                 $this->blockedIPpage();
 354                                 return;
 355                         }
 356
 357                         if ( !$wgUser->isAllowed('edit') ) {
 358                                 if ( $wgUser->isAnon() ) {
 359                                 $this->userNotLoggedInPage();
 360                                 return;
 361                         }
 362                                 else {
 363                                         $wgOut->readOnlyPage();
 364                                         return;
 365                                 }
 366                         }
 367
 368                         if ( wfReadOnly() ) {
 369                                 $wgOut->readOnlyPage();
 370                                 return;
 371                         }
 372                         if ( $wgUser->pingLimiter() ) {
 373                                 $wgOut->rateLimited();
 374                                 return;
 375                         }
 376
 377                         # If article is new, insert it.
 378                         $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 379                         if ( 0 == $aid ) {
 380                                 # Don't save a new article if it's blank.
 381                                 if ( ( '' == $this->textbox1 ) ||
 382                                   ( wfMsg( 'newarticletext' ) == $this->textbox1 ) ) {
 383                                         $wgOut->redirect( $this->mTitle->getFullURL() );
 384                                         return;
 385                                 }
 386                                 if (wfRunHooks('ArticleSave', array(&$this->mArticle, &$wgUser, &$this->textbox1,
 387                                                            &$this->summary, &$this->minoredit, &$this->watchthis, NULL)))
 388                                 {
 389                                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 390                                                                                                            $this->minoredit, $this->watchthis );
 391                                         wfRunHooks('ArticleSaveComplete', array(&$this->mArticle, &$wgUser, $this->textbox1,
 392                                                                                                                         $this->summary, $this->minoredit,
 393                                                                                                                         $this->watchthis, NULL));
 394                                 }
 395                                 return;
 396                         }
 397
 398                         # Article exists. Check for edit conflict.
 399
 400                         $this->mArticle->clear(); # Force reload of dates, etc.
 401                         $this->mArticle->forUpdate( true ); # Lock the article
 402
 403                         if( ( $this->section != 'new' ) &&
 404                                 ($this->mArticle->getTimestamp() != $this->edittime ) ) {
 405                                 $isConflict = true;
 406                         }
 407                         $userid = $wgUser->getID();
 408
 409                         if ( $isConflict) {
 410                                 wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 411                                         $this->mArticle->getTimestamp() . "'\n" );
 412                                 $text = $this->mArticle->getTextOfLastEditWithSectionReplacedOrAdded(
 413                                         $this->section, $this->textbox1, $this->summary, $this->edittime);
 414                         }
 415                         else {
 416                                 wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 417                                 $text = $this->mArticle->getTextOfLastEditWithSectionReplacedOrAdded(
 418                                         $this->section, $this->textbox1, $this->summary);
 419                         }
 420                         # Suppress edit conflict with self
 421
 422                         if ( ( 0 != $userid ) && ( $this->mArticle->getUser() == $userid ) ) {
 423                                 wfDebug( "Suppressing edit conflict, same user.\n" );
 424                                 $isConflict = false;
 425                         } else {
 426                                 # switch from section editing to normal editing in edit conflict
 427                                 if($isConflict) {
 428                                         # Attempt merge
 429                                         if( $this->mergeChangesInto( $text ) ){
 430                                                 // Successful merge! Maybe we should tell the user the good news?
 431                                                 $isConflict = false;
 432                                                 wfDebug( "Suppressing edit conflict, successful merge.\n" );
 433                                         } else {
 434                                                 $this->section = '';
 435                                                 $this->textbox1 = $text;
 436                                                 wfDebug( "Keeping edit conflict, failed merge.\n" );
 437                                         }
 438                                 }
 439                         }
 440                         if ( ! $isConflict ) {
 441                                 # All's well
 442                                 $sectionanchor = '';
 443                                 if( $this->section == 'new' ) {
 444                                         if( $this->summary != '' ) {
 445                                                 $sectionanchor = $this->sectionAnchor( $this->summary );
 446                                         }
 447                                 } elseif( $this->section != '' ) {
 448                                         # Try to get a section anchor from the section source, redirect to edited section if header found
 449                                         # XXX: might be better to integrate this into Article::getTextOfLastEditWithSectionReplacedOrAdded
 450                                         # for duplicate heading checking and maybe parsing
 451                                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 452                                         # we can't deal with anchors, includes, html etc in the header for now,
 453                                         # headline would need to be parsed to improve this
 454                                         #if($hasmatch and strlen($matches[2]) > 0 and !preg_match( "/[\\['{<>]/", $matches[2])) {
 455                                         if($hasmatch and strlen($matches[2]) > 0) {
 456                                                 $sectionanchor = $this->sectionAnchor( $matches[2] );
 457                                         }
 458                                 }
 459
 460                                 if (wfRunHooks('ArticleSave', array(&$this->mArticle, &$wgUser, &$text,
 461                                                                                                         &$this->summary, &$this->minoredit,
 462                                                                                                         &$this->watchthis, &$sectionanchor)))
 463                                 {
 464                                         # update the article here
 465                                         if($this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
 466                                                                                                            $this->watchthis, '', $sectionanchor ))
 467                                         {
 468                                                 wfRunHooks('ArticleSaveComplete', array(&$this->mArticle, &$wgUser, $text,
 469                                                                                                                                 $this->summary, $this->minoredit,
 470                                                                                                                                 $this->watchthis, $sectionanchor));
 471                                                 return;
 472                                         }
 473                                         else
 474                                           $isConflict = true;
 475                                 }
 476                         }
 477                 }
 478                 # First time through: get contents, set time for conflict
 479                 # checking, etc.
 480
 481                 if ( 'initial' == $formtype || $firsttime ) {
 482                         $this->edittime = $this->mArticle->getTimestamp();
 483                         $this->textbox1 = $this->mArticle->getContent( true );
 484                         $this->summary = '';
 485                         $this->proxyCheck();
 486                 }
 487                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 488
 489                 # Enabled article-related sidebar, toplinks, etc.
 490                 $wgOut->setArticleRelated( true );
 491
 492                 if ( $isConflict ) {
 493                         $s = wfMsg( 'editconflict', $this->mTitle->getPrefixedText() );
 494                         $wgOut->setPageTitle( $s );
 495                         $wgOut->addWikiText( wfMsg( 'explainconflict' ) );
 496
 497                         $this->textbox2 = $this->textbox1;
 498                         $this->textbox1 = $this->mArticle->getContent( true );
 499                         $this->edittime = $this->mArticle->getTimestamp();
 500                 } else {
 501
 502                         if( $this->section != '' ) {
 503                                 if( $this->section == 'new' ) {
 504                                         $s = wfMsg('editingcomment', $this->mTitle->getPrefixedText() );
 505                                 } else {
 506                                         $s = wfMsg('editingsection', $this->mTitle->getPrefixedText() );
 507                                 }
 508                                 if( !$this->preview && !$this->diff ) {
 509                                         preg_match( "/^(=+)(.+)\\1/mi",
 510                                                 $this->textbox1,
 511                                                 $matches );
 512                                         if( !empty( $matches[2] ) ) {
 513                                                 $this->summary = "/* ". trim($matches[2])." */ ";
 514                                         }
 515                                 }
 516                         } else {
 517                                 $s = wfMsg( 'editing', $this->mTitle->getPrefixedText() );
 518                         }
 519                         $wgOut->setPageTitle( $s );
 520                         if ( !$this->checkUnicodeCompliantBrowser() ) {
 521                                 $this->mArticle->setOldSubtitle();
 522                                 $wgOut->addWikiText( wfMsg( 'nonunicodebrowser') );
 523                         }
 524                         if ( isset( $this->mArticle )
 525                              && isset( $this->mArticle->mRevision )
 526                              && !$this->mArticle->mRevision->isCurrent() ) {
 527                                 $this->mArticle->setOldSubtitle();
 528                                 $wgOut->addWikiText( wfMsg( 'editingold' ) );
 529                         }
 530                 }
 531
 532                 if( wfReadOnly() ) {
 533                         $wgOut->addWikiText( wfMsg( 'readonlywarning' ) );
 534                 } else if ( $isCssJsSubpage and 'preview' != $formtype) {
 535                         $wgOut->addWikiText( wfMsg( 'usercssjsyoucanpreview' ));
 536                 }
 537                 if( $this->mTitle->isProtected('edit') ) {
 538                         $wgOut->addWikiText( wfMsg( 'protectedpagewarning' ) );
 539                 }
 540
 541                 $kblength = (int)(strlen( $this->textbox1 ) / 1024);
 542                 if( $kblength > 29 ) {
 543                         $wgOut->addWikiText( wfMsg( 'longpagewarning', $wgLang->formatNum( $kblength ) ) );
 544                 }
 545
 546                 $rows = $wgUser->getOption( 'rows' );
 547                 $cols = $wgUser->getOption( 'cols' );
 548
 549                 $ew = $wgUser->getOption( 'editwidth' );
 550                 if ( $ew ) $ew = " style=\"width:100%\"";
 551                 else $ew = '';
 552
 553                 $q = 'action=submit';
 554                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
 555                 $action = $this->mTitle->escapeLocalURL( $q );
 556
 557                 $summary = wfMsg('summary');
 558                 $subject = wfMsg('subject');
 559                 $minor   = wfMsg('minoredit');
 560                 $watchthis = wfMsg ('watchthis');
 561                 $save = wfMsg('savearticle');
 562                 $prev = wfMsg('showpreview');
 563                 $diff = wfMsg('showdiff');
 564
 565                 $cancel = $sk->makeKnownLink( $this->mTitle->getPrefixedText(),
 566                                 wfMsg('cancel') );
 567                 $edithelpurl = $sk->makeInternalOrExternalUrl( wfMsg( 'edithelppage' ));
 568                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
 569                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
 570                         htmlspecialchars( wfMsg( 'newwindow' ) );
 571
 572                 global $wgRightsText;
 573                 $copywarn = "<div id=\"editpage-copywarn\">\n" .
 574                         wfMsg( $wgRightsText ? 'copyrightwarning' : 'copyrightwarning2',
 575                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
 576                                 $wgRightsText ) . "\n</div>";
 577
 578                 if( $wgUser->getOption('showtoolbar') and !$isCssJsSubpage ) {
 579                         # prepare toolbar for edit buttons
 580                         $toolbar = $this->getEditToolbar();
 581                 } else {
 582                         $toolbar = '';
 583                 }
 584
 585                 // activate checkboxes if user wants them to be always active
 586                 if( !$this->preview && !$this->diff ) {
 587                         if( $wgUser->getOption( 'watchdefault' ) ) $this->watchthis = true;
 588                         if( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
 589
 590                         // activate checkbox also if user is already watching the page,
 591                         // require wpWatchthis to be unset so that second condition is not
 592                         // checked unnecessarily
 593                         if( !$this->watchthis && $this->mTitle->userIsWatching() ) $this->watchthis = true;
 594                 }
 595
 596                 $minoredithtml = '';
 597
 598                 if ( $wgUser->isLoggedIn() || $wgAllowAnonymousMinor ) {
 599                         $minoredithtml =
 600                                 "<input tabindex='3' type='checkbox' value='1' name='wpMinoredit'".($this->minoredit?" checked='checked'":"").
 601                                 " accesskey='".wfMsg('accesskey-minoredit')."' id='wpMinoredit' />".
 602                                 "<label for='wpMinoredit' title='".wfMsg('tooltip-minoredit')."'>{$minor}</label>";
 603                 }
 604
 605                 $watchhtml = '';
 606
 607                 if ( $wgUser->isLoggedIn() ) {
 608                         $watchhtml = "<input tabindex='4' type='checkbox' name='wpWatchthis'".($this->watchthis?" checked='checked'":"").
 609                                 " accesskey='".wfMsg('accesskey-watch')."' id='wpWatchthis'  />".
 610                                 "<label for='wpWatchthis' title='".wfMsg('tooltip-watch')."'>{$watchthis}</label>";
 611                 }
 612
 613                 $checkboxhtml = $minoredithtml . $watchhtml . '<br />';
 614
 615                 $wgOut->addHTML( '<div id="wikiPreview">' );
 616                 if ( 'preview' == $formtype) {
 617                         $previewOutput = $this->getPreviewText( $isConflict, $isCssJsSubpage );
 618                         if ( $wgUser->getOption('previewontop' ) ) {
 619                                 $wgOut->addHTML( $previewOutput );
 620                                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
 621                                         $this->mArticle->closeShowCategory();
 622                                 }
 623                                 $wgOut->addHTML( "<br style=\"clear:both;\" />\n" );
 624                         }
 625                 }
 626                 $wgOut->addHTML( '</div>' );
 627                 if ( 'diff' == $formtype ) {
 628                         if ( $wgUser->getOption('previewontop' ) ) {
 629                                 $wgOut->addHTML( $this->getDiff() );
 630                         }
 631                 }
 632
 633
 634                 # if this is a comment, show a subject line at the top, which is also the edit summary.
 635                 # Otherwise, show a summary field at the bottom
 636                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
 637                         if( $this->section == 'new' ) {
 638                                 $commentsubject="{$subject}: <input tabindex='1' type='text' value=\"$summarytext\" name=\"wpSummary\" maxlength='200' size='60' /><br />";
 639                                 $editsummary = '';
 640                         } else {
 641                                 $commentsubject = '';
 642                                 $editsummary="{$summary}: <input tabindex='2' type='text' value=\"$summarytext\" name=\"wpSummary\" maxlength='200' size='60' /><br />";
 643                         }
 644
 645                 if( !$this->preview && !$this->diff ) {
 646                 # Don't select the edit box on preview; this interferes with seeing what's going on.
 647                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
 648                 }
 649                 # Prepare a list of templates used by this page
 650                 $templates = '';
 651                 $articleTemplates = $this->mArticle->getUsedTemplates();
 652                 if ( count( $articleTemplates ) > 0 ) {
 653                         $templates = '<br />'. wfMsg( 'templatesused' ) . '<ul>';
 654                         foreach ( $articleTemplates as $tpl ) {
 655                                 if ( $titleObj = Title::makeTitle( NS_TEMPLATE, $tpl ) ) {
 656                                         $templates .= '<li>' . $sk->makeLinkObj( $titleObj ) . '</li>';
 657                                 }
 658                         }
 659                         $templates .= '</ul>';
 660                 }
 661
 662                 global $wgLivePreview, $wgStylePath;
 663                 /**
 664                  * Live Preview lets us fetch rendered preview page content and
 665                  * add it to the page without refreshing the whole page.
 666                  * Set up the button for it; if not supported by the browser
 667                  * it will fall through to the normal form submission method.
 668                  */
 669                 if( $wgLivePreview ) {
 670                         global $wgJsMimeType;
 671                         $wgOut->addHTML( '<script type="'.$wgJsMimeType.'" src="' .
 672                                 htmlspecialchars( $wgStylePath . '/common/preview.js' ) .
 673                                 '"></script>' . "\n" );
 674                         $liveAction = $wgTitle->getLocalUrl( 'action=submit&wpPreview=true&live=true' );
 675                         $liveOnclick = 'onclick="return !livePreview('.
 676                                 'getElementById(\'wikiPreview\'),' .
 677                                 'editform.wpTextbox1.value,' .
 678                                 htmlspecialchars( '"' . $liveAction . '"' ) . ')"';
 679                 } else {
 680                         $liveOnclick = '';
 681                 }
 682
 683                 global $wgUseMetadataEdit ;
 684                 if ( $wgUseMetadataEdit )
 685                 {
 686                         $metadata = $this->mMetaData ;
 687                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
 688                         $helppage = Title::newFromText ( wfmsg("metadata_page") ) ;
 689                         $top = str_replace ( "$1" , $helppage->getInternalURL() , wfmsg("metadata") ) ;
 690                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
 691                 }
 692                 else $metadata = "" ;
 693
 694
 695                 $wgOut->addHTML( <<<END
 696 {$toolbar}
 697 <form id="editform" name="editform" method="post" action="$action"
 698 enctype="multipart/form-data">
 699 {$commentsubject}
 700 <textarea tabindex='1' accesskey="," name="wpTextbox1" rows='{$rows}'
 701 cols='{$cols}'{$ew}>
 702 END
 703 . htmlspecialchars( $wgContLang->recodeForEdit( $this->textbox1 ) ) .
 704 "
 705 </textarea>
 706 {$metadata}
 707 <br />{$editsummary}
 708 {$checkboxhtml}
 709 <input tabindex='5' id='wpSave' type='submit' value=\"{$save}\" name=\"wpSave\" accesskey=\"".wfMsg('accesskey-save')."\"".
 710 " title=\"".wfMsg('tooltip-save')."\"/>
 711 <input tabindex='6' id='wpPreview' type='submit' $liveOnclick value=\"{$prev}\" name=\"wpPreview\" accesskey=\"".wfMsg('accesskey-preview')."\"".
 712 " title=\"".wfMsg('tooltip-preview')."\"/>
 713 <input tabindex='7' id='wpDiff' type='submit' value=\"{$diff}\" name=\"wpDiff\" accesskey=\"".wfMsg('accesskey-diff')."\"".
 714 " title=\"".wfMsg('tooltip-diff')."\"/>
 715 <em>{$cancel}</em> | <em>{$edithelp}</em>{$templates}" );
 716                 $wgOut->addWikiText( $copywarn );
 717                 $wgOut->addHTML( "
 718 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
 719 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n" );
 720
 721                 if ( $wgUser->isLoggedIn() ) {
 722                         /**
 723                          * To make it harder for someone to slip a user a page
 724                          * which submits an edit form to the wiki without their
 725                          * knowledge, a random token is associated with the login
 726                          * session. If it's not passed back with the submission,
 727                          * we won't save the page, or render user JavaScript and
 728                          * CSS previews.
 729                          */
 730                         $token = htmlspecialchars( $wgUser->editToken() );
 731                         $wgOut->addHTML( "
 732 <input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
 733                 }
 734
 735
 736                 if ( $isConflict ) {
 737                         require_once( "DifferenceEngine.php" );
 738                         $wgOut->addWikiText( '==' . wfMsg( "yourdiff" ) . '==' );
 739                         DifferenceEngine::showDiff( $this->textbox2, $this->textbox1,
 740                           wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
 741
 742                         $wgOut->addWikiText( '==' . wfMsg( "yourtext" ) . '==' );
 743                         $wgOut->addHTML( "<textarea tabindex=6 id='wpTextbox2' name=\"wpTextbox2\" rows='{$rows}' cols='{$cols}' wrap='virtual'>"
 744 . htmlspecialchars( $wgContLang->recodeForEdit( $this->textbox2 ) ) .
 745 "
 746 </textarea>" );
 747                 }
 748                 $wgOut->addHTML( "</form>\n" );
 749                 if ( $formtype == 'preview' && !$wgUser->getOption( 'previewontop' ) ) {
 750                         $wgOut->addHTML( '<div id="wikiPreview">' . $previewOutput . '</div>' );
 751                 }
 752                 if ( $formtype == 'diff' && !$wgUser->getOption( 'previewontop' ) ) {
 753                         #$wgOut->addHTML( '<div id="wikiPreview">' . $difftext . '</div>' );
 754                         $wgOut->addHTML( $this->getDiff() );
 755                 }
 756         }
 757
 758         /**
 759          * @todo document
 760          */
 761         function getPreviewText( $isConflict, $isCssJsSubpage ) {
 762                 global $wgOut, $wgUser, $wgTitle, $wgParser, $wgAllowDiffPreview, $wgEnableDiffPreviewPreference;
 763                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
 764                         "<p class='previewnote'>" . htmlspecialchars( wfMsg( 'previewnote' ) ) . "</p>\n";
 765                 if ( $isConflict ) {
 766                         $previewhead.='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) .
 767                                 "</h2>\n";
 768                 }
 769
 770                 $parserOptions = ParserOptions::newFromUser( $wgUser );
 771                 $parserOptions->setEditSection( false );
 772
 773                 # don't parse user css/js, show message about preview
 774                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
 775
 776                 if ( $isCssJsSubpage ) {
 777                         if(preg_match("/\\.css$/", $wgTitle->getText() ) ) {
 778                                 $previewtext = wfMsg('usercsspreview');
 779                         } else if(preg_match("/\\.js$/", $wgTitle->getText() ) ) {
 780                                 $previewtext = wfMsg('userjspreview');
 781                         }
 782                         $parserOutput = $wgParser->parse( $previewtext , $wgTitle, $parserOptions );
 783                         $wgOut->addHTML( $parserOutput->mText );
 784                         return $previewhead;
 785                 } else {
 786                         # if user want to see preview when he edit an article
 787                         if( $wgUser->getOption('previewonfirst') and ($this->textbox1 == '')) {
 788                                 $this->textbox1 = $this->mArticle->getContent(true);
 789                         }
 790
 791                         $toparse = $this->textbox1 ;
 792                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData ;
 793
 794                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ) ."\n\n",
 795                                         $wgTitle, $parserOptions );
 796
 797                         $previewHTML = $parserOutput->mText;
 798
 799                         $wgOut->addCategoryLinks($parserOutput->getCategoryLinks());
 800                         $wgOut->addLanguageLinks($parserOutput->getLanguageLinks());
 801                         return $previewhead . $previewHTML;
 802                 }
 803         }
 804
 805         /**
 806          * @todo document
 807          */
 808         function blockedIPpage() {
 809                 global $wgOut, $wgUser, $wgContLang, $wgIP;
 810
 811                 $wgOut->setPageTitle( wfMsg( 'blockedtitle' ) );
 812                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 813                 $wgOut->setArticleRelated( false );
 814
 815                 $id = $wgUser->blockedBy();
 816                 $reason = $wgUser->blockedFor();
 817                 $ip = $wgIP;
 818
 819                 if ( is_numeric( $id ) ) {
 820                         $name = User::whoIs( $id );
 821                 } else {
 822                         $name = $id;
 823                 }
 824                 $link = '[[' . $wgContLang->getNsText( NS_USER ) .
 825                   ":{$name}|{$name}]]";
 826
 827                 $wgOut->addWikiText( wfMsg( 'blockedtext', $link, $reason, $ip, $name ) );
 828                 $wgOut->returnToMain( false );
 829         }
 830
 831         /**
 832          * @todo document
 833          */
 834         function userNotLoggedInPage() {
 835                 global $wgOut;
 836
 837                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
 838                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 839                 $wgOut->setArticleRelated( false );
 840
 841                 $wgOut->addWikiText( wfMsg( 'whitelistedittext' ) );
 842                 $wgOut->returnToMain( false );
 843         }
 844
 845         /**
 846          * @todo document
 847          */
 848         function spamPage ( $match = false )
 849         {
 850                 global $wgOut;
 851                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
 852                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 853                 $wgOut->setArticleRelated( false );
 854
 855                 $wgOut->addWikiText( wfMsg( 'spamprotectiontext' ) );
 856                 if ( $match ) {
 857                         $wgOut->addWikiText( wfMsg( 'spamprotectionmatch', "<nowiki>{$match}</nowiki>" ) );
 858                 }
 859                 $wgOut->returnToMain( false );
 860         }
 861
 862         /**
 863          * Forks processes to scan the originating IP for an open proxy server
 864          * MemCached can be used to skip IPs that have already been scanned
 865          */
 866         function proxyCheck() {
 867                 global $wgBlockOpenProxies, $wgProxyPorts, $wgProxyScriptPath;
 868                 global $wgIP, $wgUseMemCached, $wgMemc, $wgDBname, $wgProxyMemcExpiry;
 869
 870                 if ( !$wgBlockOpenProxies ) {
 871                         return;
 872                 }
 873
 874                 # Get MemCached key
 875                 $skip = false;
 876                 if ( $wgUseMemCached ) {
 877                         $mcKey = $wgDBname.':proxy:ip:'.$wgIP;
 878                         $mcValue = $wgMemc->get( $mcKey );
 879                         if ( $mcValue ) {
 880                                 $skip = true;
 881                         }
 882                 }
 883
 884                 # Fork the processes
 885                 if ( !$skip ) {
 886                         $title = Title::makeTitle( NS_SPECIAL, 'Blockme' );
 887                         $iphash = md5( $wgIP . $wgProxyKey );
 888                         $url = $title->getFullURL( 'ip='.$iphash );
 889
 890                         foreach ( $wgProxyPorts as $port ) {
 891                                 $params = implode( ' ', array(
 892                                                         escapeshellarg( $wgProxyScriptPath ),
 893                                                         escapeshellarg( $wgIP ),
 894                                                         escapeshellarg( $port ),
 895                                                         escapeshellarg( $url )
 896                                                         ));
 897                                 exec( "php $params &>/dev/null &" );
 898                         }
 899                         # Set MemCached key
 900                         if ( $wgUseMemCached ) {
 901                                 $wgMemc->set( $mcKey, 1, $wgProxyMemcExpiry );
 902                         }
 903                 }
 904         }
 905
 906         /**
 907          * @access private
 908          * @todo document
 909          */
 910         function mergeChangesInto( &$editText ){
 911                 $db =& wfGetDB( DB_MASTER );
 912
 913                 // This is the revision the editor started from
 914                 $baseRevision = Revision::loadFromTimestamp(
 915                         $db, $this->mArticle->mTitle, $this->edittime );
 916                 if( is_null( $baseRevision ) ) {
 917                         return false;
 918                 }
 919                 $baseText = $baseRevision->getText();
 920
 921                 // The current state, we want to merge updates into it
 922                 $currentRevision =  Revision::loadFromTitle(
 923                         $db, $this->mArticle->mTitle );
 924                 if( is_null( $currentRevision ) ) {
 925                         return false;
 926                 }
 927                 $currentText = $currentRevision->getText();
 928
 929                 if( wfMerge( $baseText, $editText, $currentText, $result ) ){
 930                         $editText = $result;
 931                         return true;
 932                 } else {
 933                         return false;
 934                 }
 935         }
 936
 937
 938         function checkUnicodeCompliantBrowser() {
 939                 global $wgBrowserBlackList;
 940                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
 941                 foreach ( $wgBrowserBlackList as $browser ) {
 942                         if ( preg_match($browser, $currentbrowser) ) {
 943                                 return false;
 944                         }
 945                 }
 946                 return true;
 947         }
 948
 949         /**
 950          * Format an anchor fragment as it would appear for a given section name
 951          * @param string $text
 952          * @return string
 953          * @access private
 954          */
 955         function sectionAnchor( $text ) {
 956                 $headline = Sanitizer::decodeCharReferences( $text );
 957                 # strip out HTML
 958                 $headline = preg_replace( '/<.*?' . '>/', '', $headline );
 959                 $headline = trim( $headline );
 960                 $sectionanchor = '#' . urlencode( str_replace( ' ', '_', $headline ) );
 961                 $replacearray = array(
 962                         '%3A' => ':',
 963                         '%' => '.'
 964                 );
 965                 return str_replace(
 966                         array_keys( $replacearray ),
 967                         array_values( $replacearray ),
 968                         $sectionanchor );
 969         }
 970
 971         /**
 972          * Shows a bulletin board style toolbar for common editing functions.
 973          * It can be disabled in the user preferences.
 974          * The necessary JavaScript code can be found in style/wikibits.js.
 975          */
 976         function getEditToolbar() {
 977                 global $wgStylePath, $wgLang, $wgMimeType, $wgJsMimeType;
 978
 979                 /**
 980                  * toolarray an array of arrays which each include the filename of
 981                  * the button image (without path), the opening tag, the closing tag,
 982                  * and optionally a sample text that is inserted between the two when no
 983                  * selection is highlighted.
 984                  * The tip text is shown when the user moves the mouse over the button.
 985                  *
 986                  * Already here are accesskeys (key), which are not used yet until someone
 987                  * can figure out a way to make them work in IE. However, we should make
 988                  * sure these keys are not defined on the edit page.
 989                  */
 990                 $toolarray=array(
 991                         array(  'image'=>'button_bold.png',
 992                                         'open'  =>      "\'\'\'",
 993                                         'close' =>      "\'\'\'",
 994                                         'sample'=>      wfMsg('bold_sample'),
 995                                         'tip'   =>      wfMsg('bold_tip'),
 996                                         'key'   =>      'B'
 997                                 ),
 998                         array(  'image'=>'button_italic.png',
 999                                         'open'  =>      "\'\'",
1000                                         'close' =>      "\'\'",
1001                                         'sample'=>      wfMsg('italic_sample'),
1002                                         'tip'   =>      wfMsg('italic_tip'),
1003                                         'key'   =>      'I'
1004                                 ),
1005                         array(  'image'=>'button_link.png',
1006                                         'open'  =>      '[[',
1007                                         'close' =>      ']]',
1008                                         'sample'=>      wfMsg('link_sample'),
1009                                         'tip'   =>      wfMsg('link_tip'),
1010                                         'key'   =>      'L'
1011                                 ),
1012                         array(  'image'=>'button_extlink.png',
1013                                         'open'  =>      '[',
1014                                         'close' =>      ']',
1015                                         'sample'=>      wfMsg('extlink_sample'),
1016                                         'tip'   =>      wfMsg('extlink_tip'),
1017                                         'key'   =>      'X'
1018                                 ),
1019                         array(  'image'=>'button_headline.png',
1020                                         'open'  =>      "\\n== ",
1021                                         'close' =>      " ==\\n",
1022                                         'sample'=>      wfMsg('headline_sample'),
1023                                         'tip'   =>      wfMsg('headline_tip'),
1024                                         'key'   =>      'H'
1025                                 ),
1026                         array(  'image'=>'button_image.png',
1027                                         'open'  =>      '[['.$wgLang->getNsText(NS_IMAGE).":",
1028                                         'close' =>      ']]',
1029                                         'sample'=>      wfMsg('image_sample'),
1030                                         'tip'   =>      wfMsg('image_tip'),
1031                                         'key'   =>      'D'
1032                                 ),
1033                         array(  'image' =>'button_media.png',
1034                                         'open'  =>      '[['.$wgLang->getNsText(NS_MEDIA).':',
1035                                         'close' =>      ']]',
1036                                         'sample'=>      wfMsg('media_sample'),
1037                                         'tip'   =>      wfMsg('media_tip'),
1038                                         'key'   =>      'M'
1039                                 ),
1040                         array(  'image' =>'button_math.png',
1041                                         'open'  =>      "\\<math\\>",
1042                                         'close' =>      "\\</math\\>",
1043                                         'sample'=>      wfMsg('math_sample'),
1044                                         'tip'   =>      wfMsg('math_tip'),
1045                                         'key'   =>      'C'
1046                                 ),
1047                         array(  'image' =>'button_nowiki.png',
1048                                         'open'  =>      "\\<nowiki\\>",
1049                                         'close' =>      "\\</nowiki\\>",
1050                                         'sample'=>      wfMsg('nowiki_sample'),
1051                                         'tip'   =>      wfMsg('nowiki_tip'),
1052                                         'key'   =>      'N'
1053                                 ),
1054                         array(  'image' =>'button_sig.png',
1055                                         'open'  =>      '--~~~~',
1056                                         'close' =>      '',
1057                                         'sample'=>      '',
1058                                         'tip'   =>      wfMsg('sig_tip'),
1059                                         'key'   =>      'Y'
1060                                 ),
1061                         array(  'image' =>'button_hr.png',
1062                                         'open'  =>      "\\n----\\n",
1063                                         'close' =>      '',
1064                                         'sample'=>      '',
1065                                         'tip'   =>      wfMsg('hr_tip'),
1066                                         'key'   =>      'R'
1067                                 )
1068                 );
1069                 $toolbar ="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
1070
1071                 $toolbar.="document.writeln(\"<div id='toolbar'>\");\n";
1072                 foreach($toolarray as $tool) {
1073
1074                         $image=$wgStylePath.'/common/images/'.$tool['image'];
1075                         $open=$tool['open'];
1076                         $close=$tool['close'];
1077                         $sample = wfEscapeJsString( $tool['sample'] );
1078
1079                         // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
1080                         // Older browsers show a "speedtip" type message only for ALT.
1081                         // Ideally these should be different, realistically they
1082                         // probably don't need to be.
1083                         $tip = wfEscapeJsString( $tool['tip'] );
1084
1085                         #$key = $tool["key"];
1086
1087                         $toolbar.="addButton('$image','$tip','$open','$close','$sample');\n";
1088                 }
1089
1090                 $toolbar.="addInfobox('" . wfEscapeJsString( wfMsg( "infobox" ) ) .
1091                         "','" . wfEscapeJsString( wfMsg( "infobox_alert" ) ) . "');\n";
1092                 $toolbar.="document.writeln(\"</div>\");\n";
1093
1094                 $toolbar.="/*]]>*/\n</script>";
1095                 return $toolbar;
1096         }
1097
1098         /**
1099          * Output preview text only. This can be sucked into the edit page
1100          * via JavaScript, and saves the server time rendering the skin as
1101          * well as theoretically being more robust on the client (doesn't
1102          * disturb the edit box's undo history, won't eat your text on
1103          * failure, etc).
1104          *
1105          * @todo This doesn't include category or interlanguage links.
1106          *       Would need to enhance it a bit, maybe wrap them in XML
1107          *       or something... that might also require more skin
1108          *       initialization, so check whether that's a problem.
1109          */
1110         function livePreview() {
1111                 global $wgOut;
1112                 $wgOut->disable();
1113                 header( 'Content-type: text/xml' );
1114                 header( 'Cache-control: no-cache' );
1115                 # FIXME
1116                 echo $this->getPreviewText( false, false );
1117         }
1118
1119
1120         /**
1121          * Get a diff between the current contents of the edit box and the
1122          * version of the page we're editing from.
1123          *
1124          * If this is a section edit, we'll replace the section as for final
1125          * save and then make a comparison.
1126          *
1127          * @return string HTML
1128          */
1129         function getDiff() {
1130                 require_once( 'DifferenceEngine.php' );
1131                 $oldtext = $this->mArticle->fetchContent();
1132                 $newtext = $this->mArticle->getTextOfLastEditWithSectionReplacedOrAdded(
1133                         $this->section, $this->textbox1, $this->summary, $this->edittime );
1134                 $oldtitle = wfMsg( 'currentrev' );
1135                 $newtitle = wfMsg( 'yourtext' );
1136                 if ( $oldtext != wfMsg( 'noarticletext' ) || $newtext != '' ) {
1137                         $difftext = DifferenceEngine::getDiff( $oldtext, $newtext, $oldtitle, $newtitle );
1138                 }
1139
1140                 return '<div id="wikiDiff">' . $difftext . '</div>';
1141         }
1142
1143 }
1144
1145 ?>