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         var $isConflict = false;
  21         var $isCssJsSubpage = false;
  22         var $deletedSinceEdit = false;
  23         var $formtype;
  24         var $firsttime;
  25         var $lastDelete;
  26         var $mTokenOk = true;
  27         var $tooBig = false;
  28         var $kblength = false;
  29         var $missingComment = false;
  30         var $missingSummary = false;
  31         var $allowBlankSummary = false;
  32         var $autoSumm = '';
  33         var $hookError = '';
  34
  35         # Form values
  36         var $save = false, $preview = false, $diff = false;
  37         var $minoredit = false, $watchthis = false, $recreate = false;
  38         var $textbox1 = '', $textbox2 = '', $summary = '';
  39         var $edittime = '', $section = '', $starttime = '';
  40         var $oldid = 0, $editintro = '', $scrolltop = null;
  41
  42         /**
  43          * @todo document
  44          * @param $article
  45          */
  46         function EditPage( $article ) {
  47                 $this->mArticle =& $article;
  48                 global $wgTitle;
  49                 $this->mTitle =& $wgTitle;
  50         }
  51
  52         /**
  53          * This is the function that extracts metadata from the article body on the first view.
  54          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
  55          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
  56          */
  57         function extractMetaDataFromArticle () {
  58                 global $wgUseMetadataEdit , $wgMetadataWhitelist , $wgLang ;
  59                 $this->mMetaData = '' ;
  60                 if ( !$wgUseMetadataEdit ) return ;
  61                 if ( $wgMetadataWhitelist == '' ) return ;
  62                 $s = '' ;
  63                 $t = $this->mArticle->getContent();
  64
  65                 # MISSING : <nowiki> filtering
  66
  67                 # Categories and language links
  68                 $t = explode ( "\n" , $t ) ;
  69                 $catlow = strtolower ( $wgLang->getNsText ( NS_CATEGORY ) ) ;
  70                 $cat = $ll = array() ;
  71                 foreach ( $t AS $key => $x )
  72                 {
  73                         $y = trim ( strtolower ( $x ) ) ;
  74                         while ( substr ( $y , 0 , 2 ) == '[[' )
  75                         {
  76                                 $y = explode ( ']]' , trim ( $x ) ) ;
  77                                 $first = array_shift ( $y ) ;
  78                                 $first = explode ( ':' , $first ) ;
  79                                 $ns = array_shift ( $first ) ;
  80                                 $ns = trim ( str_replace ( '[' , '' , $ns ) ) ;
  81                                 if ( strlen ( $ns ) == 2 OR strtolower ( $ns ) == $catlow )
  82                                 {
  83                                         $add = '[[' . $ns . ':' . implode ( ':' , $first ) . ']]' ;
  84                                         if ( strtolower ( $ns ) == $catlow ) $cat[] = $add ;
  85                                         else $ll[] = $add ;
  86                                         $x = implode ( ']]' , $y ) ;
  87                                         $t[$key] = $x ;
  88                                         $y = trim ( strtolower ( $x ) ) ;
  89                                 }
  90                         }
  91                 }
  92                 if ( count ( $cat ) ) $s .= implode ( ' ' , $cat ) . "\n" ;
  93                 if ( count ( $ll ) ) $s .= implode ( ' ' , $ll ) . "\n" ;
  94                 $t = implode ( "\n" , $t ) ;
  95
  96                 # Load whitelist
  97                 $sat = array () ; # stand-alone-templates; must be lowercase
  98                 $wl_title = Title::newFromText ( $wgMetadataWhitelist ) ;
  99                 $wl_article = new Article ( $wl_title ) ;
 100                 $wl = explode ( "\n" , $wl_article->getContent() ) ;
 101                 foreach ( $wl AS $x )
 102                 {
 103                         $isentry = false ;
 104                         $x = trim ( $x ) ;
 105                         while ( substr ( $x , 0 , 1 ) == '*' )
 106                         {
 107                                 $isentry = true ;
 108                                 $x = trim ( substr ( $x , 1 ) ) ;
 109                         }
 110                         if ( $isentry )
 111                         {
 112                                 $sat[] = strtolower ( $x ) ;
 113                         }
 114
 115                 }
 116
 117                 # Templates, but only some
 118                 $t = explode ( '{{' , $t ) ;
 119                 $tl = array () ;
 120                 foreach ( $t AS $key => $x )
 121                 {
 122                         $y = explode ( '}}' , $x , 2 ) ;
 123                         if ( count ( $y ) == 2 )
 124                         {
 125                                 $z = $y[0] ;
 126                                 $z = explode ( '|' , $z ) ;
 127                                 $tn = array_shift ( $z ) ;
 128                                 if ( in_array ( strtolower ( $tn ) , $sat ) )
 129                                 {
 130                                         $tl[] = '{{' . $y[0] . '}}' ;
 131                                         $t[$key] = $y[1] ;
 132                                         $y = explode ( '}}' , $y[1] , 2 ) ;
 133                                 }
 134                                 else $t[$key] = '{{' . $x ;
 135                         }
 136                         else if ( $key != 0 ) $t[$key] = '{{' . $x ;
 137                         else $t[$key] = $x ;
 138                 }
 139                 if ( count ( $tl ) ) $s .= implode ( ' ' , $tl ) ;
 140                 $t = implode ( '' , $t ) ;
 141
 142                 $t = str_replace ( "\n\n\n" , "\n" , $t ) ;
 143                 $this->mArticle->mContent = $t ;
 144                 $this->mMetaData = $s ;
 145         }
 146
 147         function submit() {
 148                 $this->edit();
 149         }
 150
 151         /**
 152          * This is the function that gets called for "action=edit". It
 153          * sets up various member variables, then passes execution to
 154          * another function, usually showEditForm()
 155          *
 156          * The edit form is self-submitting, so that when things like
 157          * preview and edit conflicts occur, we get the same form back
 158          * with the extra stuff added.  Only when the final submission
 159          * is made and all is well do we actually save and redirect to
 160          * the newly-edited page.
 161          */
 162         function edit() {
 163                 global $wgOut, $wgUser, $wgRequest, $wgTitle;
 164                 global $wgEmailConfirmToEdit;
 165
 166                 if ( ! wfRunHooks( 'AlternateEdit', array( &$this  ) ) )
 167                         return;
 168
 169                 $fname = 'EditPage::edit';
 170                 wfProfileIn( $fname );
 171                 wfDebug( "$fname: enter\n" );
 172
 173                 // this is not an article
 174                 $wgOut->setArticleFlag(false);
 175
 176                 $this->importFormData( $wgRequest );
 177                 $this->firsttime = false;
 178
 179                 if( $this->live ) {
 180                         $this->livePreview();
 181                         wfProfileOut( $fname );
 182                         return;
 183                 }
 184
 185                 if ( ! $this->mTitle->userCanEdit() ) {
 186                         wfDebug( "$fname: user can't edit\n" );
 187                         $wgOut->readOnlyPage( $this->mArticle->getContent(), true );
 188                         wfProfileOut( $fname );
 189                         return;
 190                 }
 191                 wfDebug( "$fname: Checking blocks\n" );
 192                 if ( !$this->preview && !$this->diff && $wgUser->isBlockedFrom( $this->mTitle, !$this->save ) ) {
 193                         # When previewing, don't check blocked state - will get caught at save time.
 194                         # Also, check when starting edition is done against slave to improve performance.
 195                         wfDebug( "$fname: user is blocked\n" );
 196                         $wgOut->blockedPage();
 197                         wfProfileOut( $fname );
 198                         return;
 199                 }
 200                 if ( !$wgUser->isAllowed('edit') ) {
 201                         if ( $wgUser->isAnon() ) {
 202                                 wfDebug( "$fname: user must log in\n" );
 203                                 $this->userNotLoggedInPage();
 204                                 wfProfileOut( $fname );
 205                                 return;
 206                         } else {
 207                                 wfDebug( "$fname: read-only page\n" );
 208                                 $wgOut->readOnlyPage( $this->mArticle->getContent(), true );
 209                                 wfProfileOut( $fname );
 210                                 return;
 211                         }
 212                 }
 213                 if ($wgEmailConfirmToEdit && !$wgUser->isEmailConfirmed()) {
 214                         wfDebug("$fname: user must confirm e-mail address\n");
 215                         $this->userNotConfirmedPage();
 216                         wfProfileOut($fname);
 217                         return;
 218                 }
 219                 if ( !$this->mTitle->userCan( 'create' ) && !$this->mTitle->exists() ) {
 220                         wfDebug( "$fname: no create permission\n" );
 221                         $this->noCreatePermission();
 222                         wfProfileOut( $fname );
 223                         return;
 224                 }
 225                 if ( wfReadOnly() ) {
 226                         wfDebug( "$fname: read-only mode is engaged\n" );
 227                         if( $this->save || $this->preview ) {
 228                                 $this->formtype = 'preview';
 229                         } else if ( $this->diff ) {
 230                                 $this->formtype = 'diff';
 231                         } else {
 232                                 $wgOut->readOnlyPage( $this->mArticle->getContent() );
 233                                 wfProfileOut( $fname );
 234                                 return;
 235                         }
 236                 } else {
 237                         if ( $this->save ) {
 238                                 $this->formtype = 'save';
 239                         } else if ( $this->preview ) {
 240                                 $this->formtype = 'preview';
 241                         } else if ( $this->diff ) {
 242                                 $this->formtype = 'diff';
 243                         } else { # First time through
 244                                 $this->firsttime = true;
 245                                 if( $this->previewOnOpen() ) {
 246                                         $this->formtype = 'preview';
 247                                 } else {
 248                                         $this->extractMetaDataFromArticle () ;
 249                                         $this->formtype = 'initial';
 250                                 }
 251                         }
 252                 }
 253
 254                 wfProfileIn( "$fname-business-end" );
 255
 256                 $this->isConflict = false;
 257                 // css / js subpages of user pages get a special treatment
 258                 $this->isCssJsSubpage      = $wgTitle->isCssJsSubpage();
 259                 $this->isValidCssJsSubpage = $wgTitle->isValidCssJsSubpage();
 260
 261                 /* Notice that we can't use isDeleted, because it returns true if article is ever deleted
 262                  * no matter it's current state
 263                  */
 264                 $this->deletedSinceEdit = false;
 265                 if ( $this->edittime != '' ) {
 266                         /* Note that we rely on logging table, which hasn't been always there,
 267                          * but that doesn't matter, because this only applies to brand new
 268                          * deletes. This is done on every preview and save request. Move it further down
 269                          * to only perform it on saves
 270                          */
 271                         if ( $this->mTitle->isDeleted() ) {
 272                                 $this->lastDelete = $this->getLastDelete();
 273                                 if ( !is_null($this->lastDelete) ) {
 274                                         $deletetime = $this->lastDelete->log_timestamp;
 275                                         if ( ($deletetime - $this->starttime) > 0 ) {
 276                                                 $this->deletedSinceEdit = true;
 277                                         }
 278                                 }
 279                         }
 280                 }
 281
 282                 if(!$this->mTitle->getArticleID() && ('initial' == $this->formtype || $this->firsttime )) { # new article
 283                         $this->showIntro();
 284                 }
 285                 if( $this->mTitle->isTalkPage() ) {
 286                         $wgOut->addWikiText( wfMsg( 'talkpagetext' ) );
 287                 }
 288
 289                 # Attempt submission here.  This will check for edit conflicts,
 290                 # and redundantly check for locked database, blocked IPs, etc.
 291                 # that edit() already checked just in case someone tries to sneak
 292                 # in the back door with a hand-edited submission URL.
 293
 294                 if ( 'save' == $this->formtype ) {
 295                         if ( !$this->attemptSave() ) {
 296                                 wfProfileOut( "$fname-business-end" );
 297                                 wfProfileOut( $fname );
 298                                 return;
 299                         }
 300                 }
 301
 302                 # First time through: get contents, set time for conflict
 303                 # checking, etc.
 304                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 305                         $this->initialiseForm();
 306                 }
 307
 308                 $this->showEditForm();
 309                 wfProfileOut( "$fname-business-end" );
 310                 wfProfileOut( $fname );
 311         }
 312
 313         /**
 314          * Return true if this page should be previewed when the edit form
 315          * is initially opened.
 316          * @return bool
 317          * @private
 318          */
 319         function previewOnOpen() {
 320                 global $wgUser;
 321                 return $this->section != 'new' &&
 322                         ( ( $wgUser->getOption( 'previewonfirst' ) && $this->mTitle->exists() ) ||
 323                                 ( $this->mTitle->getNamespace() == NS_CATEGORY &&
 324                                         !$this->mTitle->exists() ) );
 325         }
 326
 327         /**
 328          * @todo document
 329          * @param $request
 330          */
 331         function importFormData( &$request ) {
 332                 global $wgLang, $wgUser;
 333                 $fname = 'EditPage::importFormData';
 334                 wfProfileIn( $fname );
 335
 336                 if( $request->wasPosted() ) {
 337                         # These fields need to be checked for encoding.
 338                         # Also remove trailing whitespace, but don't remove _initial_
 339                         # whitespace from the text boxes. This may be significant formatting.
 340                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 341                         $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
 342                         $this->mMetaData = rtrim( $request->getText( 'metadata'   ) );
 343                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 344                         $this->summary   = $wgLang->truncate( $request->getText( 'wpSummary'  ), 250 );
 345
 346                         $this->edittime = $request->getVal( 'wpEdittime' );
 347                         $this->starttime = $request->getVal( 'wpStarttime' );
 348
 349                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 350
 351                         if( is_null( $this->edittime ) ) {
 352                                 # If the form is incomplete, force to preview.
 353                                 wfDebug( "$fname: Form data appears to be incomplete\n" );
 354                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 355                                 $this->preview  = true;
 356                         } else {
 357                                 /* Fallback for live preview */
 358                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 359                                 $this->diff = $request->getCheck( 'wpDiff' );
 360
 361                                 if( !$this->preview ) {
 362                                         if ( $this->tokenOk( $request ) ) {
 363                                                 # Some browsers will not report any submit button
 364                                                 # if the user hits enter in the comment box.
 365                                                 # The unmarked state will be assumed to be a save,
 366                                                 # if the form seems otherwise complete.
 367                                                 wfDebug( "$fname: Passed token check.\n" );
 368                                         } else {
 369                                                 # Page might be a hack attempt posted from
 370                                                 # an external site. Preview instead of saving.
 371                                                 wfDebug( "$fname: Failed token check; forcing preview\n" );
 372                                                 $this->preview = true;
 373                                         }
 374                                 }
 375                         }
 376                         $this->save    = ! ( $this->preview OR $this->diff );
 377                         if( !preg_match( '/^\d{14}$/', $this->edittime )) {
 378                                 $this->edittime = null;
 379                         }
 380
 381                         if( !preg_match( '/^\d{14}$/', $this->starttime )) {
 382                                 $this->starttime = null;
 383                         }
 384
 385                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 386
 387                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 388                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 389
 390                         # Don't force edit summaries when a user is editing their own user or talk page
 391                         if( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) && $this->mTitle->getText() == $wgUser->getName() ) {
 392                                 $this->allowBlankSummary = true;
 393                         } else {
 394                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' );
 395                         }
 396
 397                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 398                 } else {
 399                         # Not a posted form? Start with nothing.
 400                         wfDebug( "$fname: Not a posted form.\n" );
 401                         $this->textbox1  = '';
 402                         $this->textbox2  = '';
 403                         $this->mMetaData = '';
 404                         $this->summary   = '';
 405                         $this->edittime  = '';
 406                         $this->starttime = wfTimestampNow();
 407                         $this->preview   = false;
 408                         $this->save      = false;
 409                         $this->diff      = false;
 410                         $this->minoredit = false;
 411                         $this->watchthis = false;
 412                         $this->recreate  = false;
 413                 }
 414
 415                 $this->oldid = $request->getInt( 'oldid' );
 416
 417                 # Section edit can come from either the form or a link
 418                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 419
 420                 $this->live = $request->getCheck( 'live' );
 421                 $this->editintro = $request->getText( 'editintro' );
 422
 423                 wfProfileOut( $fname );
 424         }
 425
 426         /**
 427          * Make sure the form isn't faking a user's credentials.
 428          *
 429          * @param $request WebRequest
 430          * @return bool
 431          * @private
 432          */
 433         function tokenOk( &$request ) {
 434                 global $wgUser;
 435                 if( $wgUser->isAnon() ) {
 436                         # Anonymous users may not have a session
 437                         # open. Don't tokenize.
 438                         $this->mTokenOk = true;
 439                 } else {
 440                         $this->mTokenOk = $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
 441                 }
 442                 return $this->mTokenOk;
 443         }
 444
 445         /** */
 446         function showIntro() {
 447                 global $wgOut, $wgUser;
 448                 $addstandardintro=true;
 449                 if($this->editintro) {
 450                         $introtitle=Title::newFromText($this->editintro);
 451                         if(isset($introtitle) && $introtitle->userCanRead()) {
 452                                 $rev=Revision::newFromTitle($introtitle);
 453                                 if($rev) {
 454                                         $wgOut->addSecondaryWikiText($rev->getText());
 455                                         $addstandardintro=false;
 456                                 }
 457                         }
 458                 }
 459                 if($addstandardintro) {
 460                         if ( $wgUser->isLoggedIn() )
 461                                 $wgOut->addWikiText( wfMsg( 'newarticletext' ) );
 462                         else
 463                                 $wgOut->addWikiText( wfMsg( 'newarticletextanon' ) );
 464                 }
 465         }
 466
 467         /**
 468          * Attempt submission
 469          * @return bool false if output is done, true if the rest of the form should be displayed
 470          */
 471         function attemptSave() {
 472                 global $wgSpamRegex, $wgFilterCallback, $wgUser, $wgOut;
 473                 global $wgMaxArticleSize;
 474
 475                 $fname = 'EditPage::attemptSave';
 476                 wfProfileIn( $fname );
 477                 wfProfileIn( "$fname-checks" );
 478
 479                 # Reintegrate metadata
 480                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 481                 $this->mMetaData = '' ;
 482
 483                 # Check for spam
 484                 if ( $wgSpamRegex && preg_match( $wgSpamRegex, $this->textbox1, $matches ) ) {
 485                         $this->spamPage ( $matches[0] );
 486                         wfProfileOut( "$fname-checks" );
 487                         wfProfileOut( $fname );
 488                         return false;
 489                 }
 490                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section ) ) {
 491                         # Error messages or other handling should be performed by the filter function
 492                         wfProfileOut( $fname );
 493                         wfProfileOut( "$fname-checks" );
 494                         return false;
 495                 }
 496                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError ) ) ) {
 497                         # Error messages etc. could be handled within the hook...
 498                         wfProfileOut( $fname );
 499                         wfProfileOut( "$fname-checks" );
 500                         return false;
 501                 } elseif( $this->hookError != '' ) {
 502                         # ...or the hook could be expecting us to produce an error
 503                         wfProfileOut( "$fname-checks " );
 504                         wfProfileOut( $fname );
 505                         return true;
 506                 }
 507                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 508                         # Check block state against master, thus 'false'.
 509                         $this->blockedIPpage();
 510                         wfProfileOut( "$fname-checks" );
 511                         wfProfileOut( $fname );
 512                         return false;
 513                 }
 514                 $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 515                 if ( $this->kblength > $wgMaxArticleSize ) {
 516                         // Error will be displayed by showEditForm()
 517                         $this->tooBig = true;
 518                         wfProfileOut( "$fname-checks" );
 519                         wfProfileOut( $fname );
 520                         return true;
 521                 }
 522
 523                 if ( !$wgUser->isAllowed('edit') ) {
 524                         if ( $wgUser->isAnon() ) {
 525                                 $this->userNotLoggedInPage();
 526                                 wfProfileOut( "$fname-checks" );
 527                                 wfProfileOut( $fname );
 528                                 return false;
 529                         }
 530                         else {
 531                                 $wgOut->readOnlyPage();
 532                                 wfProfileOut( "$fname-checks" );
 533                                 wfProfileOut( $fname );
 534                                 return false;
 535                         }
 536                 }
 537
 538                 if ( wfReadOnly() ) {
 539                         $wgOut->readOnlyPage();
 540                         wfProfileOut( "$fname-checks" );
 541                         wfProfileOut( $fname );
 542                         return false;
 543                 }
 544                 if ( $wgUser->pingLimiter() ) {
 545                         $wgOut->rateLimited();
 546                         wfProfileOut( "$fname-checks" );
 547                         wfProfileOut( $fname );
 548                         return false;
 549                 }
 550
 551                 # If the article has been deleted while editing, don't save it without
 552                 # confirmation
 553                 if ( $this->deletedSinceEdit && !$this->recreate ) {
 554                         wfProfileOut( "$fname-checks" );
 555                         wfProfileOut( $fname );
 556                         return true;
 557                 }
 558
 559                 wfProfileOut( "$fname-checks" );
 560
 561                 # If article is new, insert it.
 562                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 563                 if ( 0 == $aid ) {
 564                         // Late check for create permission, just in case *PARANOIA*
 565                         if ( !$this->mTitle->userCan( 'create' ) ) {
 566                                 wfDebug( "$fname: no create permission\n" );
 567                                 $this->noCreatePermission();
 568                                 wfProfileOut( $fname );
 569                                 return;
 570                         }
 571
 572                         # Don't save a new article if it's blank.
 573                         if ( ( '' == $this->textbox1 ) ) {
 574                                         $wgOut->redirect( $this->mTitle->getFullURL() );
 575                                         wfProfileOut( $fname );
 576                                         return false;
 577                         }
 578
 579                         $isComment=($this->section=='new');
 580                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 581                                 $this->minoredit, $this->watchthis, false, $isComment);
 582
 583                         wfProfileOut( $fname );
 584                         return false;
 585                 }
 586
 587                 # Article exists. Check for edit conflict.
 588
 589                 $this->mArticle->clear(); # Force reload of dates, etc.
 590                 $this->mArticle->forUpdate( true ); # Lock the article
 591
 592                 if( $this->mArticle->getTimestamp() != $this->edittime ) {
 593                         $this->isConflict = true;
 594                         if( $this->section == 'new' ) {
 595                                 if( $this->mArticle->getUserText() == $wgUser->getName() &&
 596                                         $this->mArticle->getComment() == $this->summary ) {
 597                                         // Probably a duplicate submission of a new comment.
 598                                         // This can happen when squid resends a request after
 599                                         // a timeout but the first one actually went through.
 600                                         wfDebug( "EditPage::editForm duplicate new section submission; trigger edit conflict!\n" );
 601                                 } else {
 602                                         // New comment; suppress conflict.
 603                                         $this->isConflict = false;
 604                                         wfDebug( "EditPage::editForm conflict suppressed; new section\n" );
 605                                 }
 606                         }
 607                 }
 608                 $userid = $wgUser->getID();
 609
 610                 if ( $this->isConflict) {
 611                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 612                                 $this->mArticle->getTimestamp() . "'\n" );
 613                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime);
 614                 }
 615                 else {
 616                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 617                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary);
 618                 }
 619                 if( is_null( $text ) ) {
 620                         wfDebug( "EditPage::editForm activating conflict; section replace failed.\n" );
 621                         $this->isConflict = true;
 622                         $text = $this->textbox1;
 623                 }
 624
 625                 # Suppress edit conflict with self, except for section edits where merging is required.
 626                 if ( ( $this->section == '' ) && ( 0 != $userid ) && ( $this->mArticle->getUser() == $userid ) ) {
 627                         wfDebug( "Suppressing edit conflict, same user.\n" );
 628                         $this->isConflict = false;
 629                 } else {
 630                         # switch from section editing to normal editing in edit conflict
 631                         if($this->isConflict) {
 632                                 # Attempt merge
 633                                 if( $this->mergeChangesInto( $text ) ){
 634                                         // Successful merge! Maybe we should tell the user the good news?
 635                                         $this->isConflict = false;
 636                                         wfDebug( "Suppressing edit conflict, successful merge.\n" );
 637                                 } else {
 638                                         $this->section = '';
 639                                         $this->textbox1 = $text;
 640                                         wfDebug( "Keeping edit conflict, failed merge.\n" );
 641                                 }
 642                         }
 643                 }
 644
 645                 if ( $this->isConflict ) {
 646                         wfProfileOut( $fname );
 647                         return true;
 648                 }
 649
 650                 # Handle the user preference to force summaries here
 651                 if( $this->section != 'new' && !$this->allowBlankSummary && $wgUser->getOption( 'forceeditsummary' ) ) {
 652                         if( md5( $this->summary ) == $this->autoSumm ) {
 653                                 $this->missingSummary = true;
 654                                 wfProfileOut( $fname );
 655                                 return( true );
 656                         }
 657                 }
 658
 659                 # All's well
 660                 wfProfileIn( "$fname-sectionanchor" );
 661                 $sectionanchor = '';
 662                 if( $this->section == 'new' ) {
 663                         if ( $this->textbox1 == '' ) {
 664                                 $this->missingComment = true;
 665                                 return true;
 666                         }
 667                         if( $this->summary != '' ) {
 668                                 $sectionanchor = $this->sectionAnchor( $this->summary );
 669                         }
 670                 } elseif( $this->section != '' ) {
 671                         # Try to get a section anchor from the section source, redirect to edited section if header found
 672                         # XXX: might be better to integrate this into Article::replaceSection
 673                         # for duplicate heading checking and maybe parsing
 674                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 675                         # we can't deal with anchors, includes, html etc in the header for now,
 676                         # headline would need to be parsed to improve this
 677                         if($hasmatch and strlen($matches[2]) > 0) {
 678                                 $sectionanchor = $this->sectionAnchor( $matches[2] );
 679                         }
 680                 }
 681                 wfProfileOut( "$fname-sectionanchor" );
 682
 683                 // Save errors may fall down to the edit form, but we've now
 684                 // merged the section into full text. Clear the section field
 685                 // so that later submission of conflict forms won't try to
 686                 // replace that into a duplicated mess.
 687                 $this->textbox1 = $text;
 688                 $this->section = '';
 689
 690                 // Check for length errors again now that the section is merged in
 691                 $this->kblength = (int)(strlen( $text ) / 1024);
 692                 if ( $this->kblength > $wgMaxArticleSize ) {
 693                         $this->tooBig = true;
 694                         wfProfileOut( $fname );
 695                         return true;
 696                 }
 697
 698                 # update the article here
 699                 if( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
 700                         $this->watchthis, '', $sectionanchor ) ) {
 701                         wfProfileOut( $fname );
 702                         return false;
 703                 } else {
 704                         $this->isConflict = true;
 705                 }
 706                 wfProfileOut( $fname );
 707                 return true;
 708         }
 709
 710         /**
 711          * Initialise form fields in the object
 712          * Called on the first invocation, e.g. when a user clicks an edit link
 713          */
 714         function initialiseForm() {
 715                 $this->edittime = $this->mArticle->getTimestamp();
 716                 $this->textbox1 = $this->mArticle->getContent();
 717                 $this->summary = '';
 718                 if ( !$this->mArticle->exists() && $this->mArticle->mTitle->getNamespace() == NS_MEDIAWIKI )
 719                         $this->textbox1 = wfMsgWeirdKey ( $this->mArticle->mTitle->getText() ) ;
 720                 wfProxyCheck();
 721         }
 722
 723         /**
 724          * Send the edit form and related headers to $wgOut
 725          * @param $formCallback Optional callable that takes an OutputPage
 726          *                      parameter; will be called during form output
 727          *                      near the top, for captchas and the like.
 728          */
 729         function showEditForm( $formCallback=null ) {
 730                 global $wgOut, $wgUser, $wgLang, $wgContLang, $wgMaxArticleSize;
 731
 732                 $fname = 'EditPage::showEditForm';
 733                 wfProfileIn( $fname );
 734
 735                 $sk =& $wgUser->getSkin();
 736
 737                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) ) ;
 738
 739                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 740
 741                 # Enabled article-related sidebar, toplinks, etc.
 742                 $wgOut->setArticleRelated( true );
 743
 744                 if ( $this->isConflict ) {
 745                         $s = wfMsg( 'editconflict', $this->mTitle->getPrefixedText() );
 746                         $wgOut->setPageTitle( $s );
 747                         $wgOut->addWikiText( wfMsg( 'explainconflict' ) );
 748
 749                         $this->textbox2 = $this->textbox1;
 750                         $this->textbox1 = $this->mArticle->getContent();
 751                         $this->edittime = $this->mArticle->getTimestamp();
 752                 } else {
 753
 754                         if( $this->section != '' ) {
 755                                 if( $this->section == 'new' ) {
 756                                         $s = wfMsg('editingcomment', $this->mTitle->getPrefixedText() );
 757                                 } else {
 758                                         $s = wfMsg('editingsection', $this->mTitle->getPrefixedText() );
 759                                         if( !$this->preview && !$this->diff ) {
 760                                                 preg_match( "/^(=+)(.+)\\1/mi",
 761                                                         $this->textbox1,
 762                                                         $matches );
 763                                                 if( !empty( $matches[2] ) ) {
 764                                                         $this->summary = "/* ". trim($matches[2])." */ ";
 765                                                 }
 766                                         }
 767                                 }
 768                         } else {
 769                                 $s = wfMsg( 'editing', $this->mTitle->getPrefixedText() );
 770                         }
 771                         $wgOut->setPageTitle( $s );
 772
 773                         if ( $this->missingComment ) {
 774                                 $wgOut->addWikiText( wfMsg( 'missingcommenttext' ) );
 775                         }
 776
 777                         if( $this->missingSummary ) {
 778                                 $wgOut->addWikiText( wfMsg( 'missingsummary' ) );
 779                         }
 780
 781                         if( !$this->hookError == '' ) {
 782                                 $wgOut->addWikiText( $this->hookError );
 783                         }
 784
 785                         if ( !$this->checkUnicodeCompliantBrowser() ) {
 786                                 $wgOut->addWikiText( wfMsg( 'nonunicodebrowser') );
 787                         }
 788                         if ( isset( $this->mArticle )
 789                              && isset( $this->mArticle->mRevision )
 790                              && !$this->mArticle->mRevision->isCurrent() ) {
 791                                 $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
 792                                 $wgOut->addWikiText( wfMsg( 'editingold' ) );
 793                         }
 794                 }
 795
 796                 if( wfReadOnly() ) {
 797                         $wgOut->addWikiText( wfMsg( 'readonlywarning' ) );
 798                 } elseif( $wgUser->isAnon() && $this->formtype != 'preview' ) {
 799                         $wgOut->addWikiText( wfMsg( 'anoneditwarning' ) );
 800                 } else {
 801                         if( $this->isCssJsSubpage && $this->formtype != 'preview' ) {
 802                                 # Check the skin exists
 803                                 if( $this->isValidCssJsSubpage ) {
 804                                         $wgOut->addWikiText( wfMsg( 'usercssjsyoucanpreview' ) );
 805                                 } else {
 806                                         $wgOut->addWikiText( wfMsg( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
 807                                 }
 808                         }
 809                 }
 810
 811                 if( $this->mTitle->isProtected( 'edit' ) ) {
 812                         # Is the protection due to the namespace, e.g. interface text?
 813                         if( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 814                                 # Yes; remind the user
 815                                 $notice = wfMsg( 'editinginterface' );
 816                         } elseif( $this->mTitle->isSemiProtected() ) {
 817                                 # No; semi protected
 818                                 $notice = wfMsg( 'semiprotectedpagewarning' );
 819                                 if( wfEmptyMsg( 'semiprotectedpagewarning', $notice ) || $notice == '-' ) {
 820                                         $notice = '';
 821                                 }
 822                         } else {
 823                                 # No; regular protection
 824                                 $notice = wfMsg( 'protectedpagewarning' );
 825                         }
 826                         $wgOut->addWikiText( $notice );
 827                 }
 828
 829                 if ( $this->kblength === false ) {
 830                         $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 831                 }
 832                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
 833                         $wgOut->addWikiText( wfMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgMaxArticleSize ) );
 834                 } elseif( $this->kblength > 29 ) {
 835                         $wgOut->addWikiText( wfMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) ) );
 836                 }
 837
 838                 $rows = $wgUser->getIntOption( 'rows' );
 839                 $cols = $wgUser->getIntOption( 'cols' );
 840
 841                 $ew = $wgUser->getOption( 'editwidth' );
 842                 if ( $ew ) $ew = " style=\"width:100%\"";
 843                 else $ew = '';
 844
 845                 $q = 'action=submit';
 846                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
 847                 $action = $this->mTitle->escapeLocalURL( $q );
 848
 849                 $summary = wfMsg('summary');
 850                 $subject = wfMsg('subject');
 851                 $minor   = wfMsg('minoredit');
 852                 $watchthis = wfMsg ('watchthis');
 853
 854                 $cancel = $sk->makeKnownLink( $this->mTitle->getPrefixedText(),
 855                                 wfMsg('cancel') );
 856                 $edithelpurl = $sk->makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ));
 857                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
 858                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
 859                         htmlspecialchars( wfMsg( 'newwindow' ) );
 860
 861                 global $wgRightsText;
 862                 $copywarn = "<div id=\"editpage-copywarn\">\n" .
 863                         wfMsg( $wgRightsText ? 'copyrightwarning' : 'copyrightwarning2',
 864                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
 865                                 $wgRightsText ) . "\n</div>";
 866
 867                 if( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
 868                         # prepare toolbar for edit buttons
 869                         $toolbar = $this->getEditToolbar();
 870                 } else {
 871                         $toolbar = '';
 872                 }
 873
 874                 // activate checkboxes if user wants them to be always active
 875                 if( !$this->preview && !$this->diff ) {
 876                         # Sort out the "watch" checkbox
 877                         if( $wgUser->getOption( 'watchdefault' ) ) {
 878                                 # Watch all edits
 879                                 $this->watchthis = true;
 880                         } elseif( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 881                                 # Watch creations
 882                                 $this->watchthis = true;
 883                         } elseif( $this->mTitle->userIsWatching() ) {
 884                                 # Already watched
 885                                 $this->watchthis = true;
 886                         }
 887
 888                         if( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
 889                 }
 890
 891                 $minoredithtml = '';
 892
 893                 if ( $wgUser->isAllowed('minoredit') ) {
 894                         $minoredithtml =
 895                                 "<input tabindex='3' type='checkbox' value='1' name='wpMinoredit'".($this->minoredit?" checked='checked'":"").
 896                                 " accesskey='".wfMsg('accesskey-minoredit')."' id='wpMinoredit' />".
 897                                 "<label for='wpMinoredit' title='".wfMsg('tooltip-minoredit')."'>{$minor}</label>";
 898                 }
 899
 900                 $watchhtml = '';
 901
 902                 if ( $wgUser->isLoggedIn() ) {
 903                         $watchhtml = "<input tabindex='4' type='checkbox' name='wpWatchthis'".
 904                                 ($this->watchthis?" checked='checked'":"").
 905                                 " accesskey=\"".htmlspecialchars(wfMsg('accesskey-watch'))."\" id='wpWatchthis'  />".
 906                                 "<label for='wpWatchthis' title=\"" .
 907                                         htmlspecialchars(wfMsg('tooltip-watch'))."\">{$watchthis}</label>";
 908                 }
 909
 910                 $checkboxhtml = $minoredithtml . $watchhtml;
 911
 912                 if ( $wgUser->getOption( 'previewontop' ) ) {
 913
 914                         if ( 'preview' == $this->formtype ) {
 915                                 $this->showPreview();
 916                         } else {
 917                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
 918                         }
 919
 920                         if ( 'diff' == $this->formtype ) {
 921                                 $wgOut->addHTML( $this->getDiff() );
 922                         }
 923                 }
 924
 925
 926                 # if this is a comment, show a subject line at the top, which is also the edit summary.
 927                 # Otherwise, show a summary field at the bottom
 928                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
 929                 if( $this->section == 'new' ) {
 930                         $commentsubject="<span id='wpSummaryLabel'><label for='wpSummary'>{$subject}:</label></span> <div class='editOptions'><input tabindex='1' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
 931                         $editsummary = '';
 932                 } else {
 933                         $commentsubject = '';
 934                         $editsummary="<span id='wpSummaryLabel'><label for='wpSummary'>{$summary}:</label></span> <div class='editOptions'><input tabindex='2' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
 935                 }
 936
 937                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
 938                 if( !$this->preview && !$this->diff ) {
 939                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
 940                 }
 941                 $templates = $this->formatTemplates();
 942
 943                 global $wgUseMetadataEdit ;
 944                 if ( $wgUseMetadataEdit ) {
 945                         $metadata = $this->mMetaData ;
 946                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
 947                         $top = wfMsgWikiHtml( 'metadata_help' );
 948                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
 949                 }
 950                 else $metadata = "" ;
 951
 952                 $hidden = '';
 953                 $recreate = '';
 954                 if ($this->deletedSinceEdit) {
 955                         if ( 'save' != $this->formtype ) {
 956                                 $wgOut->addWikiText( wfMsg('deletedwhileediting'));
 957                         } else {
 958                                 // Hide the toolbar and edit area, use can click preview to get it back
 959                                 // Add an confirmation checkbox and explanation.
 960                                 $toolbar = '';
 961                                 $hidden = 'type="hidden" style="display:none;"';
 962                                 $recreate = $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ));
 963                                 $recreate .=
 964                                         "<br /><input tabindex='1' type='checkbox' value='1' name='wpRecreate' id='wpRecreate' />".
 965                                         "<label for='wpRecreate' title='".wfMsg('tooltip-recreate')."'>". wfMsg('recreate')."</label>";
 966                         }
 967                 }
 968
 969                 $temp = array(
 970                         'id'        => 'wpSave',
 971                         'name'      => 'wpSave',
 972                         'type'      => 'submit',
 973                         'tabindex'  => '5',
 974                         'value'     => wfMsg('savearticle'),
 975                         'accesskey' => wfMsg('accesskey-save'),
 976                         'title'     => wfMsg('tooltip-save'),
 977                 );
 978                 $buttons['save'] = wfElement('input', $temp, '');
 979                 $temp = array(
 980                         'id'        => 'wpDiff',
 981                         'name'      => 'wpDiff',
 982                         'type'      => 'submit',
 983                         'tabindex'  => '7',
 984                         'value'     => wfMsg('showdiff'),
 985                         'accesskey' => wfMsg('accesskey-diff'),
 986                         'title'     => wfMsg('tooltip-diff'),
 987                 );
 988                 $buttons['diff'] = wfElement('input', $temp, '');
 989
 990                 global $wgLivePreview;
 991                 if ( $wgLivePreview && $wgUser->getOption( 'uselivepreview' ) ) {
 992                         $temp = array(
 993                                 'id'        => 'wpPreview',
 994                                 'name'      => 'wpPreview',
 995                                 'type'      => 'submit',
 996                                 'tabindex'  => '6',
 997                                 'value'     => wfMsg('showpreview'),
 998                                 'accesskey' => '',
 999                                 'title'     => wfMsg('tooltip-preview'),
1000                                 'style'     => 'display: none;',
1001                         );
1002                         $buttons['preview'] = wfElement('input', $temp, '');
1003                         $temp = array(
1004                                 'id'        => 'wpLivePreview',
1005                                 'name'      => 'wpLivePreview',
1006                                 'type'      => 'submit',
1007                                 'tabindex'  => '6',
1008                                 'value'     => wfMsg('showlivepreview'),
1009                                 'accesskey' => wfMsg('accesskey-preview'),
1010                                 'title'     => '',
1011                                 'onclick'   => $this->doLivePreviewScript(),
1012                         );
1013                         $buttons['live'] = wfElement('input', $temp, '');
1014                 } else {
1015                         $temp = array(
1016                                 'id'        => 'wpPreview',
1017                                 'name'      => 'wpPreview',
1018                                 'type'      => 'submit',
1019                                 'tabindex'  => '6',
1020                                 'value'     => wfMsg('showpreview'),
1021                                 'accesskey' => wfMsg('accesskey-preview'),
1022                                 'title'     => wfMsg('tooltip-preview'),
1023                         );
1024                         $buttons['preview'] = wfElement('input', $temp, '');
1025                         $buttons['live'] = '';
1026                 }
1027
1028                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
1029                         ? ""
1030                         : "<input type='hidden' name=\"safemode\" value='1' />\n";
1031
1032                 $wgOut->addHTML( <<<END
1033 {$toolbar}
1034 <form id="editform" name="editform" method="post" action="$action"
1035 enctype="multipart/form-data">
1036 END
1037 );
1038
1039                 if( is_callable( $formCallback ) ) {
1040                         call_user_func_array( $formCallback, array( &$wgOut ) );
1041                 }
1042
1043                 // Put these up at the top to ensure they aren't lost on early form submission
1044                 $wgOut->addHTML( "
1045 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
1046 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
1047 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
1048 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
1049
1050                 $wgOut->addHTML( <<<END
1051 $recreate
1052 {$commentsubject}
1053 <textarea tabindex='1' accesskey="," name="wpTextbox1" id="wpTextbox1" rows='{$rows}'
1054 cols='{$cols}'{$ew} $hidden>
1055 END
1056 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox1 ) ) .
1057 "
1058 </textarea>
1059                 " );
1060
1061                 $wgOut->addWikiText( $copywarn );
1062                 $wgOut->addHTML( "
1063 {$metadata}
1064 {$editsummary}
1065 {$checkboxhtml}
1066 {$safemodehtml}
1067 ");
1068
1069                 $wgOut->addHTML("
1070 <div class='editButtons'>
1071         {$buttons['save']}
1072         {$buttons['preview']}
1073         {$buttons['live']}
1074         {$buttons['diff']}
1075         <span class='editHelp'>{$cancel} | {$edithelp}</span>
1076 </div><!-- editButtons -->
1077 </div><!-- editOptions -->");
1078
1079                 $wgOut->addWikiText( wfMsgForContent( 'edittools' ) );
1080
1081                 $wgOut->addHTML( "
1082 <div class='templatesUsed'>
1083 {$templates}
1084 </div>
1085 " );
1086
1087                 if ( $wgUser->isLoggedIn() ) {
1088                         /**
1089                          * To make it harder for someone to slip a user a page
1090                          * which submits an edit form to the wiki without their
1091                          * knowledge, a random token is associated with the login
1092                          * session. If it's not passed back with the submission,
1093                          * we won't save the page, or render user JavaScript and
1094                          * CSS previews.
1095                          */
1096                         $token = htmlspecialchars( $wgUser->editToken() );
1097                         $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
1098                 }
1099
1100                 # If a blank edit summary was previously provided, and the appropriate
1101                 # user preference is active, pass a hidden tag here. This will stop the
1102                 # user being bounced back more than once in the event that a summary
1103                 # is not required.
1104                 if( $this->missingSummary ) {
1105                         $wgOut->addHTML( "<input type=\"hidden\" name=\"wpIgnoreBlankSummary\" value=\"1\" />\n" );
1106                 }
1107
1108                 # For a bit more sophisticated detection of blank summaries, hash the
1109                 # automatic one and pass that in a hidden field.
1110                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1111                 $wgOut->addHTML( "<input type=\"hidden\" name=\"wpAutoSummary\" value=\"$autosumm\" />\n" );
1112
1113                 if ( $this->isConflict ) {
1114                         require_once( "DifferenceEngine.php" );
1115                         $wgOut->addWikiText( '==' . wfMsg( "yourdiff" ) . '==' );
1116
1117                         $de = new DifferenceEngine( $this->mTitle );
1118                         $de->setText( $this->textbox2, $this->textbox1 );
1119                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1120
1121                         $wgOut->addWikiText( '==' . wfMsg( "yourtext" ) . '==' );
1122                         $wgOut->addHTML( "<textarea tabindex=6 id='wpTextbox2' name=\"wpTextbox2\" rows='{$rows}' cols='{$cols}' wrap='virtual'>"
1123                                 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox2 ) ) . "\n</textarea>" );
1124                 }
1125                 $wgOut->addHTML( "</form>\n" );
1126                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1127
1128                         if ( $this->formtype == 'preview') {
1129                                 $this->showPreview();
1130                         } else {
1131                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
1132                         }
1133
1134                         if ( $this->formtype == 'diff') {
1135                                 $wgOut->addHTML( $this->getDiff() );
1136                         }
1137
1138                 }
1139
1140                 wfProfileOut( $fname );
1141         }
1142
1143         /**
1144          * Append preview output to $wgOut.
1145          * Includes category rendering if this is a category page.
1146          * @private
1147          */
1148         function showPreview() {
1149                 global $wgOut;
1150                 $wgOut->addHTML( '<div id="wikiPreview">' );
1151                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1152                         $this->mArticle->openShowCategory();
1153                 }
1154                 $previewOutput = $this->getPreviewText();
1155                 $wgOut->addHTML( $previewOutput );
1156                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1157                         $this->mArticle->closeShowCategory();
1158                 }
1159                 $wgOut->addHTML( "<br style=\"clear:both;\" />\n" );
1160                 $wgOut->addHTML( '</div>' );
1161         }
1162
1163         /**
1164          * Prepare a list of templates used by this page. Returns HTML.
1165          */
1166         function formatTemplates() {
1167                 global $wgUser;
1168
1169                 $fname = 'EditPage::formatTemplates';
1170                 wfProfileIn( $fname );
1171
1172                 $sk =& $wgUser->getSkin();
1173
1174                 $outText = '';
1175                 $templates = $this->mArticle->getUsedTemplates();
1176                 if ( count( $templates ) > 0 ) {
1177                         # Do a batch existence check
1178                         $batch = new LinkBatch;
1179                         foreach( $templates as $title ) {
1180                                 $batch->addObj( $title );
1181                         }
1182                         $batch->execute();
1183
1184                         # Construct the HTML
1185                         $outText = '<br />'. wfMsg( 'templatesused' ) . '<ul>';
1186                         foreach ( $templates as $titleObj ) {
1187                                 $outText .= '<li>' . $sk->makeLinkObj( $titleObj ) . '</li>';
1188                         }
1189                         $outText .= '</ul>';
1190                 }
1191                 wfProfileOut( $fname );
1192                 return $outText;
1193         }
1194
1195         /**
1196          * Live Preview lets us fetch rendered preview page content and
1197          * add it to the page without refreshing the whole page.
1198          * If not supported by the browser it will fall through to the normal form
1199          * submission method.
1200          *
1201          * This function outputs a script tag to support live preview, and
1202          * returns an onclick handler which should be added to the attributes
1203          * of the preview button
1204          */
1205         function doLivePreviewScript() {
1206                 global $wgStylePath, $wgJsMimeType, $wgOut, $wgTitle;
1207                 $wgOut->addHTML( '<script type="'.$wgJsMimeType.'" src="' .
1208                         htmlspecialchars( $wgStylePath . '/common/preview.js' ) .
1209                         '"></script>' . "\n" );
1210                 $liveAction = $wgTitle->getLocalUrl( 'action=submit&wpPreview=true&live=true' );
1211                 return "return !livePreview(" .
1212                         "getElementById('wikiPreview')," .
1213                         "editform.wpTextbox1.value," .
1214                         '"' . $liveAction . '"' . ")";
1215         }
1216
1217         function getLastDelete() {
1218                 $dbr =& wfGetDB( DB_SLAVE );
1219                 $fname = 'EditPage::getLastDelete';
1220                 $res = $dbr->select(
1221                         array( 'logging', 'user' ),
1222                         array( 'log_type',
1223                                'log_action',
1224                                'log_timestamp',
1225                                'log_user',
1226                                'log_namespace',
1227                                'log_title',
1228                                'log_comment',
1229                                'log_params',
1230                                'user_name', ),
1231                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1232                                'log_title' => $this->mTitle->getDBkey(),
1233                                'log_type' => 'delete',
1234                                'log_action' => 'delete',
1235                                'user_id=log_user' ),
1236                         $fname,
1237                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
1238
1239                 if($dbr->numRows($res) == 1) {
1240                         while ( $x = $dbr->fetchObject ( $res ) )
1241                                 $data = $x;
1242                         $dbr->freeResult ( $res ) ;
1243                 } else {
1244                         $data = null;
1245                 }
1246                 return $data;
1247         }
1248
1249         /**
1250          * @todo document
1251          */
1252         function getPreviewText() {
1253                 global $wgOut, $wgUser, $wgTitle, $wgParser;
1254
1255                 $fname = 'EditPage::getPreviewText';
1256                 wfProfileIn( $fname );
1257
1258                 if ( $this->mTokenOk ) {
1259                         $msg = 'previewnote';
1260                 } else {
1261                         $msg = 'session_fail_preview';
1262                 }
1263                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
1264                         "<div class='previewnote'>" . $wgOut->parse( wfMsg( $msg ) ) . "</div>\n";
1265                 if ( $this->isConflict ) {
1266                         $previewhead.='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1267                 }
1268
1269                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1270                 $parserOptions->setEditSection( false );
1271
1272                 # don't parse user css/js, show message about preview
1273                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1274
1275                 if ( $this->isCssJsSubpage ) {
1276                         if(preg_match("/\\.css$/", $wgTitle->getText() ) ) {
1277                                 $previewtext = wfMsg('usercsspreview');
1278                         } else if(preg_match("/\\.js$/", $wgTitle->getText() ) ) {
1279                                 $previewtext = wfMsg('userjspreview');
1280                         }
1281                         $parserOptions->setTidy(true);
1282                         $parserOutput = $wgParser->parse( $previewtext , $wgTitle, $parserOptions );
1283                         $wgOut->addHTML( $parserOutput->mText );
1284                         wfProfileOut( $fname );
1285                         return $previewhead;
1286                 } else {
1287                         # if user want to see preview when he edit an article
1288                         if( $wgUser->getOption('previewonfirst') and ($this->textbox1 == '')) {
1289                                 $this->textbox1 = $this->mArticle->getContent();
1290                         }
1291
1292                         $toparse = $this->textbox1;
1293
1294                         # If we're adding a comment, we need to show the
1295                         # summary as the headline
1296                         if($this->section=="new" && $this->summary!="") {
1297                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1298                         }
1299
1300                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData ;
1301                         $parserOptions->setTidy(true);
1302                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ) ."\n\n",
1303                                         $wgTitle, $parserOptions );
1304
1305                         $previewHTML = $parserOutput->getText();
1306                         $wgOut->addParserOutputNoText( $parserOutput );
1307
1308                         wfProfileOut( $fname );
1309                         return $previewhead . $previewHTML;
1310                 }
1311         }
1312
1313         /**
1314          * Call the stock "user is blocked" page
1315          */
1316         function blockedIPpage() {
1317                 global $wgOut;
1318                 $wgOut->blockedPage();
1319         }
1320
1321         /**
1322          * Produce the stock "please login to edit pages" page
1323          */
1324         function userNotLoggedInPage() {
1325                 global $wgUser, $wgOut;
1326                 $skin = $wgUser->getSkin();
1327
1328                 $loginTitle = Title::makeTitle( NS_SPECIAL, 'Userlogin' );
1329                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $this->mTitle->getPrefixedUrl() );
1330
1331                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1332                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1333                 $wgOut->setArticleRelated( false );
1334
1335                 $wgOut->addHtml( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
1336                 $wgOut->returnToMain( false, $this->mTitle->getPrefixedUrl() );
1337         }
1338
1339         /**
1340          * Creates a basic error page which informs the user that
1341          * they have to validate their email address before being
1342          * allowed to edit.
1343          */
1344         function userNotConfirmedPage() {
1345                 global $wgOut;
1346
1347                 $wgOut->setPageTitle( wfMsg( 'confirmedittitle' ) );
1348                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1349                 $wgOut->setArticleRelated( false );
1350
1351                 $wgOut->addWikiText( wfMsg( 'confirmedittext' ) );
1352                 $wgOut->returnToMain( false );
1353         }
1354
1355         /**
1356          * Produce the stock "your edit contains spam" page
1357          *
1358          * @param $match Text which triggered one or more filters
1359          */
1360         function spamPage( $match = false ) {
1361                 global $wgOut;
1362
1363                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1364                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1365                 $wgOut->setArticleRelated( false );
1366
1367                 $wgOut->addWikiText( wfMsg( 'spamprotectiontext' ) );
1368                 if ( $match )
1369                         $wgOut->addWikiText( wfMsg( 'spamprotectionmatch', "<nowiki>{$match}</nowiki>" ) );
1370
1371                 $wgOut->returnToMain( false );
1372         }
1373
1374         /**
1375          * @private
1376          * @todo document
1377          */
1378         function mergeChangesInto( &$editText ){
1379                 $fname = 'EditPage::mergeChangesInto';
1380                 wfProfileIn( $fname );
1381
1382                 $db =& wfGetDB( DB_MASTER );
1383
1384                 // This is the revision the editor started from
1385                 $baseRevision = Revision::loadFromTimestamp(
1386                         $db, $this->mArticle->mTitle, $this->edittime );
1387                 if( is_null( $baseRevision ) ) {
1388                         wfProfileOut( $fname );
1389                         return false;
1390                 }
1391                 $baseText = $baseRevision->getText();
1392
1393                 // The current state, we want to merge updates into it
1394                 $currentRevision =  Revision::loadFromTitle(
1395                         $db, $this->mArticle->mTitle );
1396                 if( is_null( $currentRevision ) ) {
1397                         wfProfileOut( $fname );
1398                         return false;
1399                 }
1400                 $currentText = $currentRevision->getText();
1401
1402                 if( wfMerge( $baseText, $editText, $currentText, $result ) ){
1403                         $editText = $result;
1404                         wfProfileOut( $fname );
1405                         return true;
1406                 } else {
1407                         wfProfileOut( $fname );
1408                         return false;
1409                 }
1410         }
1411
1412         /**
1413          * Check if the browser is on a blacklist of user-agents known to
1414          * mangle UTF-8 data on form submission. Returns true if Unicode
1415          * should make it through, false if it's known to be a problem.
1416          * @return bool
1417          * @private
1418          */
1419         function checkUnicodeCompliantBrowser() {
1420                 global $wgBrowserBlackList;
1421                 if( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
1422                         // No User-Agent header sent? Trust it by default...
1423                         return true;
1424                 }
1425                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1426                 foreach ( $wgBrowserBlackList as $browser ) {
1427                         if ( preg_match($browser, $currentbrowser) ) {
1428                                 return false;
1429                         }
1430                 }
1431                 return true;
1432         }
1433
1434         /**
1435          * Format an anchor fragment as it would appear for a given section name
1436          * @param string $text
1437          * @return string
1438          * @private
1439          */
1440         function sectionAnchor( $text ) {
1441                 $headline = Sanitizer::decodeCharReferences( $text );
1442                 # strip out HTML
1443                 $headline = preg_replace( '/<.*?' . '>/', '', $headline );
1444                 $headline = trim( $headline );
1445                 $sectionanchor = '#' . urlencode( str_replace( ' ', '_', $headline ) );
1446                 $replacearray = array(
1447                         '%3A' => ':',
1448                         '%' => '.'
1449                 );
1450                 return str_replace(
1451                         array_keys( $replacearray ),
1452                         array_values( $replacearray ),
1453                         $sectionanchor );
1454         }
1455
1456         /**
1457          * Shows a bulletin board style toolbar for common editing functions.
1458          * It can be disabled in the user preferences.
1459          * The necessary JavaScript code can be found in style/wikibits.js.
1460          */
1461         function getEditToolbar() {
1462                 global $wgStylePath, $wgContLang, $wgJsMimeType;
1463
1464                 /**
1465                  * toolarray an array of arrays which each include the filename of
1466                  * the button image (without path), the opening tag, the closing tag,
1467                  * and optionally a sample text that is inserted between the two when no
1468                  * selection is highlighted.
1469                  * The tip text is shown when the user moves the mouse over the button.
1470                  *
1471                  * Already here are accesskeys (key), which are not used yet until someone
1472                  * can figure out a way to make them work in IE. However, we should make
1473                  * sure these keys are not defined on the edit page.
1474                  */
1475                 $toolarray=array(
1476                         array(  'image'=>'button_bold.png',
1477                                         'open'  =>      "\'\'\'",
1478                                         'close' =>      "\'\'\'",
1479                                         'sample'=>      wfMsg('bold_sample'),
1480                                         'tip'   =>      wfMsg('bold_tip'),
1481                                         'key'   =>      'B'
1482                                 ),
1483                         array(  'image'=>'button_italic.png',
1484                                         'open'  =>      "\'\'",
1485                                         'close' =>      "\'\'",
1486                                         'sample'=>      wfMsg('italic_sample'),
1487                                         'tip'   =>      wfMsg('italic_tip'),
1488                                         'key'   =>      'I'
1489                                 ),
1490                         array(  'image'=>'button_link.png',
1491                                         'open'  =>      '[[',
1492                                         'close' =>      ']]',
1493                                         'sample'=>      wfMsg('link_sample'),
1494                                         'tip'   =>      wfMsg('link_tip'),
1495                                         'key'   =>      'L'
1496                                 ),
1497                         array(  'image'=>'button_extlink.png',
1498                                         'open'  =>      '[',
1499                                         'close' =>      ']',
1500                                         'sample'=>      wfMsg('extlink_sample'),
1501                                         'tip'   =>      wfMsg('extlink_tip'),
1502                                         'key'   =>      'X'
1503                                 ),
1504                         array(  'image'=>'button_headline.png',
1505                                         'open'  =>      "\\n== ",
1506                                         'close' =>      " ==\\n",
1507                                         'sample'=>      wfMsg('headline_sample'),
1508                                         'tip'   =>      wfMsg('headline_tip'),
1509                                         'key'   =>      'H'
1510                                 ),
1511                         array(  'image'=>'button_image.png',
1512                                         'open'  =>      '[['.$wgContLang->getNsText(NS_IMAGE).":",
1513                                         'close' =>      ']]',
1514                                         'sample'=>      wfMsg('image_sample'),
1515                                         'tip'   =>      wfMsg('image_tip'),
1516                                         'key'   =>      'D'
1517                                 ),
1518                         array(  'image' =>'button_media.png',
1519                                         'open'  =>      '[['.$wgContLang->getNsText(NS_MEDIA).':',
1520                                         'close' =>      ']]',
1521                                         'sample'=>      wfMsg('media_sample'),
1522                                         'tip'   =>      wfMsg('media_tip'),
1523                                         'key'   =>      'M'
1524                                 ),
1525                         array(  'image' =>'button_math.png',
1526                                         'open'  =>      "\\<math\\>",
1527                                         'close' =>      "\\</math\\>",
1528                                         'sample'=>      wfMsg('math_sample'),
1529                                         'tip'   =>      wfMsg('math_tip'),
1530                                         'key'   =>      'C'
1531                                 ),
1532                         array(  'image' =>'button_nowiki.png',
1533                                         'open'  =>      "\\<nowiki\\>",
1534                                         'close' =>      "\\</nowiki\\>",
1535                                         'sample'=>      wfMsg('nowiki_sample'),
1536                                         'tip'   =>      wfMsg('nowiki_tip'),
1537                                         'key'   =>      'N'
1538                                 ),
1539                         array(  'image' =>'button_sig.png',
1540                                         'open'  =>      '--~~~~',
1541                                         'close' =>      '',
1542                                         'sample'=>      '',
1543                                         'tip'   =>      wfMsg('sig_tip'),
1544                                         'key'   =>      'Y'
1545                                 ),
1546                         array(  'image' =>'button_hr.png',
1547                                         'open'  =>      "\\n----\\n",
1548                                         'close' =>      '',
1549                                         'sample'=>      '',
1550                                         'tip'   =>      wfMsg('hr_tip'),
1551                                         'key'   =>      'R'
1552                                 )
1553                 );
1554                 $toolbar = "<div id='toolbar'>\n";
1555                 $toolbar.="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
1556
1557                 foreach($toolarray as $tool) {
1558
1559                         $image=$wgStylePath.'/common/images/'.$tool['image'];
1560                         $open=$tool['open'];
1561                         $close=$tool['close'];
1562                         $sample = wfEscapeJsString( $tool['sample'] );
1563
1564                         // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
1565                         // Older browsers show a "speedtip" type message only for ALT.
1566                         // Ideally these should be different, realistically they
1567                         // probably don't need to be.
1568                         $tip = wfEscapeJsString( $tool['tip'] );
1569
1570                         #$key = $tool["key"];
1571
1572                         $toolbar.="addButton('$image','$tip','$open','$close','$sample');\n";
1573                 }
1574
1575                 $toolbar.="/*]]>*/\n</script>";
1576                 $toolbar.="\n</div>";
1577                 return $toolbar;
1578         }
1579
1580         /**
1581          * Output preview text only. This can be sucked into the edit page
1582          * via JavaScript, and saves the server time rendering the skin as
1583          * well as theoretically being more robust on the client (doesn't
1584          * disturb the edit box's undo history, won't eat your text on
1585          * failure, etc).
1586          *
1587          * @todo This doesn't include category or interlanguage links.
1588          *       Would need to enhance it a bit, maybe wrap them in XML
1589          *       or something... that might also require more skin
1590          *       initialization, so check whether that's a problem.
1591          */
1592         function livePreview() {
1593                 global $wgOut;
1594                 $wgOut->disable();
1595                 header( 'Content-type: text/xml' );
1596                 header( 'Cache-control: no-cache' );
1597                 # FIXME
1598                 echo $this->getPreviewText( );
1599                 /* To not shake screen up and down between preview and live-preview */
1600                 echo "<br style=\"clear:both;\" />\n";
1601         }
1602
1603
1604         /**
1605          * Get a diff between the current contents of the edit box and the
1606          * version of the page we're editing from.
1607          *
1608          * If this is a section edit, we'll replace the section as for final
1609          * save and then make a comparison.
1610          *
1611          * @return string HTML
1612          */
1613         function getDiff() {
1614                 require_once( 'DifferenceEngine.php' );
1615                 $oldtext = $this->mArticle->fetchContent();
1616                 $newtext = $this->mArticle->replaceSection(
1617                         $this->section, $this->textbox1, $this->summary, $this->edittime );
1618                 $oldtitle = wfMsg( 'currentrev' );
1619                 $newtitle = wfMsg( 'yourtext' );
1620                 if ( $oldtext !== false  || $newtext != '' ) {
1621                         $de = new DifferenceEngine( $this->mTitle );
1622                         $de->setText( $oldtext, $newtext );
1623                         $difftext = $de->getDiff( $oldtitle, $newtitle );
1624                 } else {
1625                         $difftext = '';
1626                 }
1627
1628                 return '<div id="wikiDiff">' . $difftext . '</div>';
1629         }
1630
1631         /**
1632          * Filter an input field through a Unicode de-armoring process if it
1633          * came from an old browser with known broken Unicode editing issues.
1634          *
1635          * @param WebRequest $request
1636          * @param string $field
1637          * @return string
1638          * @private
1639          */
1640         function safeUnicodeInput( $request, $field ) {
1641                 $text = rtrim( $request->getText( $field ) );
1642                 return $request->getBool( 'safemode' )
1643                         ? $this->unmakesafe( $text )
1644                         : $text;
1645         }
1646
1647         /**
1648          * Filter an output field through a Unicode armoring process if it is
1649          * going to an old browser with known broken Unicode editing issues.
1650          *
1651          * @param string $text
1652          * @return string
1653          * @private
1654          */
1655         function safeUnicodeOutput( $text ) {
1656                 global $wgContLang;
1657                 $codedText = $wgContLang->recodeForEdit( $text );
1658                 return $this->checkUnicodeCompliantBrowser()
1659                         ? $codedText
1660                         : $this->makesafe( $codedText );
1661         }
1662
1663         /**
1664          * A number of web browsers are known to corrupt non-ASCII characters
1665          * in a UTF-8 text editing environment. To protect against this,
1666          * detected browsers will be served an armored version of the text,
1667          * with non-ASCII chars converted to numeric HTML character references.
1668          *
1669          * Preexisting such character references will have a 0 added to them
1670          * to ensure that round-trips do not alter the original data.
1671          *
1672          * @param string $invalue
1673          * @return string
1674          * @private
1675          */
1676         function makesafe( $invalue ) {
1677                 // Armor existing references for reversability.
1678                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
1679
1680                 $bytesleft = 0;
1681                 $result = "";
1682                 $working = 0;
1683                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1684                         $bytevalue = ord( $invalue{$i} );
1685                         if( $bytevalue <= 0x7F ) { //0xxx xxxx
1686                                 $result .= chr( $bytevalue );
1687                                 $bytesleft = 0;
1688                         } elseif( $bytevalue <= 0xBF ) { //10xx xxxx
1689                                 $working = $working << 6;
1690                                 $working += ($bytevalue & 0x3F);
1691                                 $bytesleft--;
1692                                 if( $bytesleft <= 0 ) {
1693                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
1694                                 }
1695                         } elseif( $bytevalue <= 0xDF ) { //110x xxxx
1696                                 $working = $bytevalue & 0x1F;
1697                                 $bytesleft = 1;
1698                         } elseif( $bytevalue <= 0xEF ) { //1110 xxxx
1699                                 $working = $bytevalue & 0x0F;
1700                                 $bytesleft = 2;
1701                         } else { //1111 0xxx
1702                                 $working = $bytevalue & 0x07;
1703                                 $bytesleft = 3;
1704                         }
1705                 }
1706                 return $result;
1707         }
1708
1709         /**
1710          * Reverse the previously applied transliteration of non-ASCII characters
1711          * back to UTF-8. Used to protect data from corruption by broken web browsers
1712          * as listed in $wgBrowserBlackList.
1713          *
1714          * @param string $invalue
1715          * @return string
1716          * @private
1717          */
1718         function unmakesafe( $invalue ) {
1719                 $result = "";
1720                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1721                         if( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
1722                                 $i += 3;
1723                                 $hexstring = "";
1724                                 do {
1725                                         $hexstring .= $invalue{$i};
1726                                         $i++;
1727                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
1728
1729                                 // Do some sanity checks. These aren't needed for reversability,
1730                                 // but should help keep the breakage down if the editor
1731                                 // breaks one of the entities whilst editing.
1732                                 if ((substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6)) {
1733                                         $codepoint = hexdec($hexstring);
1734                                         $result .= codepointToUtf8( $codepoint );
1735                                 } else {
1736                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
1737                                 }
1738                         } else {
1739                                 $result .= substr( $invalue, $i, 1 );
1740                         }
1741                 }
1742                 // reverse the transform that we made for reversability reasons.
1743                 return strtr( $result, array( "&#x0" => "&#x" ) );
1744         }
1745
1746         function noCreatePermission() {
1747                 global $wgOut;
1748                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
1749                 $wgOut->addWikiText( wfMsg( 'nocreatetext' ) );
1750         }
1751
1752 }
1753
1754 ?>