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                         # If no edit comment was given when creating a new page, and what's being
 580                         # created is a redirect, be smart and fill in a neat auto-comment
 581                         if( $this->summary == '' ) {
 582                                 $rt = Title::newFromRedirect( $this->textbox1 );
 583                                 if( is_object( $rt ) )
 584                                         $this->summary = wfMsgForContent( 'autoredircomment', $rt->getPrefixedText() );
 585                         }
 586
 587                         $isComment=($this->section=='new');
 588                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 589                                 $this->minoredit, $this->watchthis, false, $isComment);
 590
 591                         wfProfileOut( $fname );
 592                         return false;
 593                 }
 594
 595                 # Article exists. Check for edit conflict.
 596
 597                 $this->mArticle->clear(); # Force reload of dates, etc.
 598                 $this->mArticle->forUpdate( true ); # Lock the article
 599
 600                 if( $this->mArticle->getTimestamp() != $this->edittime ) {
 601                         $this->isConflict = true;
 602                         if( $this->section == 'new' ) {
 603                                 if( $this->mArticle->getUserText() == $wgUser->getName() &&
 604                                         $this->mArticle->getComment() == $this->summary ) {
 605                                         // Probably a duplicate submission of a new comment.
 606                                         // This can happen when squid resends a request after
 607                                         // a timeout but the first one actually went through.
 608                                         wfDebug( "EditPage::editForm duplicate new section submission; trigger edit conflict!\n" );
 609                                 } else {
 610                                         // New comment; suppress conflict.
 611                                         $this->isConflict = false;
 612                                         wfDebug( "EditPage::editForm conflict suppressed; new section\n" );
 613                                 }
 614                         }
 615                 }
 616                 $userid = $wgUser->getID();
 617
 618                 if ( $this->isConflict) {
 619                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 620                                 $this->mArticle->getTimestamp() . "'\n" );
 621                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime);
 622                 }
 623                 else {
 624                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 625                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary);
 626                 }
 627                 if( is_null( $text ) ) {
 628                         wfDebug( "EditPage::editForm activating conflict; section replace failed.\n" );
 629                         $this->isConflict = true;
 630                         $text = $this->textbox1;
 631                 }
 632
 633                 # Suppress edit conflict with self, except for section edits where merging is required.
 634                 if ( ( $this->section == '' ) && ( 0 != $userid ) && ( $this->mArticle->getUser() == $userid ) ) {
 635                         wfDebug( "Suppressing edit conflict, same user.\n" );
 636                         $this->isConflict = false;
 637                 } else {
 638                         # switch from section editing to normal editing in edit conflict
 639                         if($this->isConflict) {
 640                                 # Attempt merge
 641                                 if( $this->mergeChangesInto( $text ) ){
 642                                         // Successful merge! Maybe we should tell the user the good news?
 643                                         $this->isConflict = false;
 644                                         wfDebug( "Suppressing edit conflict, successful merge.\n" );
 645                                 } else {
 646                                         $this->section = '';
 647                                         $this->textbox1 = $text;
 648                                         wfDebug( "Keeping edit conflict, failed merge.\n" );
 649                                 }
 650                         }
 651                 }
 652
 653                 if ( $this->isConflict ) {
 654                         wfProfileOut( $fname );
 655                         return true;
 656                 }
 657
 658                 # Handle the user preference to force summaries here
 659                 if( $this->section != 'new' && !$this->allowBlankSummary && $wgUser->getOption( 'forceeditsummary' ) ) {
 660                         if( md5( $this->summary ) == $this->autoSumm ) {
 661                                 $this->missingSummary = true;
 662                                 wfProfileOut( $fname );
 663                                 return( true );
 664                         }
 665                 }
 666
 667                 # All's well
 668                 wfProfileIn( "$fname-sectionanchor" );
 669                 $sectionanchor = '';
 670                 if( $this->section == 'new' ) {
 671                         if ( $this->textbox1 == '' ) {
 672                                 $this->missingComment = true;
 673                                 return true;
 674                         }
 675                         if( $this->summary != '' ) {
 676                                 $sectionanchor = $this->sectionAnchor( $this->summary );
 677                         }
 678                 } elseif( $this->section != '' ) {
 679                         # Try to get a section anchor from the section source, redirect to edited section if header found
 680                         # XXX: might be better to integrate this into Article::replaceSection
 681                         # for duplicate heading checking and maybe parsing
 682                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 683                         # we can't deal with anchors, includes, html etc in the header for now,
 684                         # headline would need to be parsed to improve this
 685                         if($hasmatch and strlen($matches[2]) > 0) {
 686                                 $sectionanchor = $this->sectionAnchor( $matches[2] );
 687                         }
 688                 }
 689                 wfProfileOut( "$fname-sectionanchor" );
 690
 691                 // Save errors may fall down to the edit form, but we've now
 692                 // merged the section into full text. Clear the section field
 693                 // so that later submission of conflict forms won't try to
 694                 // replace that into a duplicated mess.
 695                 $this->textbox1 = $text;
 696                 $this->section = '';
 697
 698                 // Check for length errors again now that the section is merged in
 699                 $this->kblength = (int)(strlen( $text ) / 1024);
 700                 if ( $this->kblength > $wgMaxArticleSize ) {
 701                         $this->tooBig = true;
 702                         wfProfileOut( $fname );
 703                         return true;
 704                 }
 705
 706                 # update the article here
 707                 if( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
 708                         $this->watchthis, '', $sectionanchor ) ) {
 709                         wfProfileOut( $fname );
 710                         return false;
 711                 } else {
 712                         $this->isConflict = true;
 713                 }
 714                 wfProfileOut( $fname );
 715                 return true;
 716         }
 717
 718         /**
 719          * Initialise form fields in the object
 720          * Called on the first invocation, e.g. when a user clicks an edit link
 721          */
 722         function initialiseForm() {
 723                 $this->edittime = $this->mArticle->getTimestamp();
 724                 $this->textbox1 = $this->mArticle->getContent();
 725                 $this->summary = '';
 726                 if ( !$this->mArticle->exists() && $this->mArticle->mTitle->getNamespace() == NS_MEDIAWIKI )
 727                         $this->textbox1 = wfMsgWeirdKey ( $this->mArticle->mTitle->getText() ) ;
 728                 ProxyTools::proxyCheck();
 729         }
 730
 731         /**
 732          * Send the edit form and related headers to $wgOut
 733          * @param $formCallback Optional callable that takes an OutputPage
 734          *                      parameter; will be called during form output
 735          *                      near the top, for captchas and the like.
 736          */
 737         function showEditForm( $formCallback=null ) {
 738                 global $wgOut, $wgUser, $wgLang, $wgContLang, $wgMaxArticleSize;
 739
 740                 $fname = 'EditPage::showEditForm';
 741                 wfProfileIn( $fname );
 742
 743                 $sk =& $wgUser->getSkin();
 744
 745                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) ) ;
 746
 747                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 748
 749                 # Enabled article-related sidebar, toplinks, etc.
 750                 $wgOut->setArticleRelated( true );
 751
 752                 if ( $this->isConflict ) {
 753                         $s = wfMsg( 'editconflict', $this->mTitle->getPrefixedText() );
 754                         $wgOut->setPageTitle( $s );
 755                         $wgOut->addWikiText( wfMsg( 'explainconflict' ) );
 756
 757                         $this->textbox2 = $this->textbox1;
 758                         $this->textbox1 = $this->mArticle->getContent();
 759                         $this->edittime = $this->mArticle->getTimestamp();
 760                 } else {
 761
 762                         if( $this->section != '' ) {
 763                                 if( $this->section == 'new' ) {
 764                                         $s = wfMsg('editingcomment', $this->mTitle->getPrefixedText() );
 765                                 } else {
 766                                         $s = wfMsg('editingsection', $this->mTitle->getPrefixedText() );
 767                                         if( !$this->preview && !$this->diff ) {
 768                                                 preg_match( "/^(=+)(.+)\\1/mi",
 769                                                         $this->textbox1,
 770                                                         $matches );
 771                                                 if( !empty( $matches[2] ) ) {
 772                                                         $this->summary = "/* ". trim($matches[2])." */ ";
 773                                                 }
 774                                         }
 775                                 }
 776                         } else {
 777                                 $s = wfMsg( 'editing', $this->mTitle->getPrefixedText() );
 778                         }
 779                         $wgOut->setPageTitle( $s );
 780
 781                         if ( $this->missingComment ) {
 782                                 $wgOut->addWikiText( wfMsg( 'missingcommenttext' ) );
 783                         }
 784
 785                         if( $this->missingSummary ) {
 786                                 $wgOut->addWikiText( wfMsg( 'missingsummary' ) );
 787                         }
 788
 789                         if( !$this->hookError == '' ) {
 790                                 $wgOut->addWikiText( $this->hookError );
 791                         }
 792
 793                         if ( !$this->checkUnicodeCompliantBrowser() ) {
 794                                 $wgOut->addWikiText( wfMsg( 'nonunicodebrowser') );
 795                         }
 796                         if ( isset( $this->mArticle )
 797                              && isset( $this->mArticle->mRevision )
 798                              && !$this->mArticle->mRevision->isCurrent() ) {
 799                                 $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
 800                                 $wgOut->addWikiText( wfMsg( 'editingold' ) );
 801                         }
 802                 }
 803
 804                 if( wfReadOnly() ) {
 805                         $wgOut->addWikiText( wfMsg( 'readonlywarning' ) );
 806                 } elseif( $wgUser->isAnon() && $this->formtype != 'preview' ) {
 807                         $wgOut->addWikiText( wfMsg( 'anoneditwarning' ) );
 808                 } else {
 809                         if( $this->isCssJsSubpage && $this->formtype != 'preview' ) {
 810                                 # Check the skin exists
 811                                 if( $this->isValidCssJsSubpage ) {
 812                                         $wgOut->addWikiText( wfMsg( 'usercssjsyoucanpreview' ) );
 813                                 } else {
 814                                         $wgOut->addWikiText( wfMsg( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
 815                                 }
 816                         }
 817                 }
 818
 819                 if( $this->mTitle->isProtected( 'edit' ) ) {
 820                         # Is the protection due to the namespace, e.g. interface text?
 821                         if( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 822                                 # Yes; remind the user
 823                                 $notice = wfMsg( 'editinginterface' );
 824                         } elseif( $this->mTitle->isSemiProtected() ) {
 825                                 # No; semi protected
 826                                 $notice = wfMsg( 'semiprotectedpagewarning' );
 827                                 if( wfEmptyMsg( 'semiprotectedpagewarning', $notice ) || $notice == '-' ) {
 828                                         $notice = '';
 829                                 }
 830                         } else {
 831                                 # No; regular protection
 832                                 $notice = wfMsg( 'protectedpagewarning' );
 833                         }
 834                         $wgOut->addWikiText( $notice );
 835                 }
 836
 837                 if ( $this->kblength === false ) {
 838                         $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 839                 }
 840                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
 841                         $wgOut->addWikiText( wfMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgMaxArticleSize ) );
 842                 } elseif( $this->kblength > 29 ) {
 843                         $wgOut->addWikiText( wfMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) ) );
 844                 }
 845
 846                 $rows = $wgUser->getIntOption( 'rows' );
 847                 $cols = $wgUser->getIntOption( 'cols' );
 848
 849                 $ew = $wgUser->getOption( 'editwidth' );
 850                 if ( $ew ) $ew = " style=\"width:100%\"";
 851                 else $ew = '';
 852
 853                 $q = 'action=submit';
 854                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
 855                 $action = $this->mTitle->escapeLocalURL( $q );
 856
 857                 $summary = wfMsg('summary');
 858                 $subject = wfMsg('subject');
 859                 $minor   = wfMsgExt('minoredit', array('parseinline'));
 860                 $watchthis = wfMsgExt('watchthis', array('parseinline'));
 861
 862                 $cancel = $sk->makeKnownLink( $this->mTitle->getPrefixedText(),
 863                                 wfMsgExt('cancel', array('parseinline')) );
 864                 $edithelpurl = $sk->makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ));
 865                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
 866                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
 867                         htmlspecialchars( wfMsg( 'newwindow' ) );
 868
 869                 global $wgRightsText;
 870                 $copywarn = "<div id=\"editpage-copywarn\">\n" .
 871                         wfMsg( $wgRightsText ? 'copyrightwarning' : 'copyrightwarning2',
 872                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
 873                                 $wgRightsText ) . "\n</div>";
 874
 875                 if( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
 876                         # prepare toolbar for edit buttons
 877                         $toolbar = $this->getEditToolbar();
 878                 } else {
 879                         $toolbar = '';
 880                 }
 881
 882                 // activate checkboxes if user wants them to be always active
 883                 if( !$this->preview && !$this->diff ) {
 884                         # Sort out the "watch" checkbox
 885                         if( $wgUser->getOption( 'watchdefault' ) ) {
 886                                 # Watch all edits
 887                                 $this->watchthis = true;
 888                         } elseif( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 889                                 # Watch creations
 890                                 $this->watchthis = true;
 891                         } elseif( $this->mTitle->userIsWatching() ) {
 892                                 # Already watched
 893                                 $this->watchthis = true;
 894                         }
 895
 896                         if( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
 897                 }
 898
 899                 $minoredithtml = '';
 900
 901                 if ( $wgUser->isAllowed('minoredit') ) {
 902                         $minoredithtml =
 903                                 "<input tabindex='3' type='checkbox' value='1' name='wpMinoredit'".($this->minoredit?" checked='checked'":"").
 904                                 " accesskey='".wfMsg('accesskey-minoredit')."' id='wpMinoredit' />\n".
 905                                 "<label for='wpMinoredit' title='".wfMsg('tooltip-minoredit')."'>{$minor}</label>\n";
 906                 }
 907
 908                 $watchhtml = '';
 909
 910                 if ( $wgUser->isLoggedIn() ) {
 911                         $watchhtml = "<input tabindex='4' type='checkbox' name='wpWatchthis'".
 912                                 ($this->watchthis?" checked='checked'":"").
 913                                 " accesskey=\"".htmlspecialchars(wfMsg('accesskey-watch'))."\" id='wpWatchthis'  />\n".
 914                                 "<label for='wpWatchthis' title=\"" .
 915                                         htmlspecialchars(wfMsg('tooltip-watch'))."\">{$watchthis}</label>\n";
 916                 }
 917
 918                 $checkboxhtml = $minoredithtml . $watchhtml;
 919
 920                 if ( $wgUser->getOption( 'previewontop' ) ) {
 921
 922                         if ( 'preview' == $this->formtype ) {
 923                                 $this->showPreview();
 924                         } else {
 925                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
 926                         }
 927
 928                         if ( 'diff' == $this->formtype ) {
 929                                 $wgOut->addHTML( $this->getDiff() );
 930                         }
 931                 }
 932
 933
 934                 # if this is a comment, show a subject line at the top, which is also the edit summary.
 935                 # Otherwise, show a summary field at the bottom
 936                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
 937                 if( $this->section == 'new' ) {
 938                         $commentsubject="<span id='wpSummaryLabel'><label for='wpSummary'>{$subject}:</label></span>\n<div class='editOptions'>\n<input tabindex='1' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
 939                         $editsummary = '';
 940                 } else {
 941                         $commentsubject = '';
 942                         $editsummary="<span id='wpSummaryLabel'><label for='wpSummary'>{$summary}:</label></span>\n<div class='editOptions'>\n<input tabindex='2' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
 943                 }
 944
 945                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
 946                 if( !$this->preview && !$this->diff ) {
 947                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
 948                 }
 949                 $templates = $this->formatTemplates();
 950
 951                 global $wgUseMetadataEdit ;
 952                 if ( $wgUseMetadataEdit ) {
 953                         $metadata = $this->mMetaData ;
 954                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
 955                         $top = wfMsgWikiHtml( 'metadata_help' );
 956                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
 957                 }
 958                 else $metadata = "" ;
 959
 960                 $hidden = '';
 961                 $recreate = '';
 962                 if ($this->deletedSinceEdit) {
 963                         if ( 'save' != $this->formtype ) {
 964                                 $wgOut->addWikiText( wfMsg('deletedwhileediting'));
 965                         } else {
 966                                 // Hide the toolbar and edit area, use can click preview to get it back
 967                                 // Add an confirmation checkbox and explanation.
 968                                 $toolbar = '';
 969                                 $hidden = 'type="hidden" style="display:none;"';
 970                                 $recreate = $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ));
 971                                 $recreate .=
 972                                         "<br /><input tabindex='1' type='checkbox' value='1' name='wpRecreate' id='wpRecreate' />".
 973                                         "<label for='wpRecreate' title='".wfMsg('tooltip-recreate')."'>". wfMsg('recreate')."</label>";
 974                         }
 975                 }
 976
 977                 $temp = array(
 978                         'id'        => 'wpSave',
 979                         'name'      => 'wpSave',
 980                         'type'      => 'submit',
 981                         'tabindex'  => '5',
 982                         'value'     => wfMsg('savearticle'),
 983                         'accesskey' => wfMsg('accesskey-save'),
 984                         'title'     => wfMsg('tooltip-save'),
 985                 );
 986                 $buttons['save'] = wfElement('input', $temp, '');
 987                 $temp = array(
 988                         'id'        => 'wpDiff',
 989                         'name'      => 'wpDiff',
 990                         'type'      => 'submit',
 991                         'tabindex'  => '7',
 992                         'value'     => wfMsg('showdiff'),
 993                         'accesskey' => wfMsg('accesskey-diff'),
 994                         'title'     => wfMsg('tooltip-diff'),
 995                 );
 996                 $buttons['diff'] = wfElement('input', $temp, '');
 997
 998                 global $wgLivePreview;
 999                 if ( $wgLivePreview && $wgUser->getOption( 'uselivepreview' ) ) {
1000                         $temp = array(
1001                                 'id'        => 'wpPreview',
1002                                 'name'      => 'wpPreview',
1003                                 'type'      => 'submit',
1004                                 'tabindex'  => '6',
1005                                 'value'     => wfMsg('showpreview'),
1006                                 'accesskey' => '',
1007                                 'title'     => wfMsg('tooltip-preview'),
1008                                 'style'     => 'display: none;',
1009                         );
1010                         $buttons['preview'] = wfElement('input', $temp, '');
1011                         $temp = array(
1012                                 'id'        => 'wpLivePreview',
1013                                 'name'      => 'wpLivePreview',
1014                                 'type'      => 'submit',
1015                                 'tabindex'  => '6',
1016                                 'value'     => wfMsg('showlivepreview'),
1017                                 'accesskey' => wfMsg('accesskey-preview'),
1018                                 'title'     => '',
1019                                 'onclick'   => $this->doLivePreviewScript(),
1020                         );
1021                         $buttons['live'] = wfElement('input', $temp, '');
1022                 } else {
1023                         $temp = array(
1024                                 'id'        => 'wpPreview',
1025                                 'name'      => 'wpPreview',
1026                                 'type'      => 'submit',
1027                                 'tabindex'  => '6',
1028                                 'value'     => wfMsg('showpreview'),
1029                                 'accesskey' => wfMsg('accesskey-preview'),
1030                                 'title'     => wfMsg('tooltip-preview'),
1031                         );
1032                         $buttons['preview'] = wfElement('input', $temp, '');
1033                         $buttons['live'] = '';
1034                 }
1035
1036                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
1037                         ? ""
1038                         : "<input type='hidden' name=\"safemode\" value='1' />\n";
1039
1040                 $wgOut->addHTML( <<<END
1041 {$toolbar}
1042 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1043 END
1044 );
1045
1046                 if( is_callable( $formCallback ) ) {
1047                         call_user_func_array( $formCallback, array( &$wgOut ) );
1048                 }
1049
1050                 // Put these up at the top to ensure they aren't lost on early form submission
1051                 $wgOut->addHTML( "
1052 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
1053 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
1054 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
1055 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
1056
1057                 $wgOut->addHTML( <<<END
1058 $recreate
1059 {$commentsubject}
1060 <textarea tabindex='1' accesskey="," name="wpTextbox1" id="wpTextbox1" rows='{$rows}'
1061 cols='{$cols}'{$ew} $hidden>
1062 END
1063 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox1 ) ) .
1064 "
1065 </textarea>
1066                 " );
1067
1068                 $wgOut->addWikiText( $copywarn );
1069                 $wgOut->addHTML( "
1070 {$metadata}
1071 {$editsummary}
1072 {$checkboxhtml}
1073 {$safemodehtml}
1074 ");
1075
1076                 $wgOut->addHTML(
1077 "<div class='editButtons'>
1078         {$buttons['save']}
1079         {$buttons['preview']}
1080         {$buttons['live']}
1081         {$buttons['diff']}
1082         <span class='editHelp'>{$cancel} | {$edithelp}</span>
1083 </div><!-- editButtons -->
1084 </div><!-- editOptions -->");
1085
1086                 $wgOut->addWikiText( wfMsgForContent( 'edittools' ) );
1087
1088                 $wgOut->addHTML( "
1089 <div class='templatesUsed'>
1090 {$templates}
1091 </div>
1092 " );
1093
1094                 if ( $wgUser->isLoggedIn() ) {
1095                         /**
1096                          * To make it harder for someone to slip a user a page
1097                          * which submits an edit form to the wiki without their
1098                          * knowledge, a random token is associated with the login
1099                          * session. If it's not passed back with the submission,
1100                          * we won't save the page, or render user JavaScript and
1101                          * CSS previews.
1102                          */
1103                         $token = htmlspecialchars( $wgUser->editToken() );
1104                         $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
1105                 }
1106
1107                 # If a blank edit summary was previously provided, and the appropriate
1108                 # user preference is active, pass a hidden tag here. This will stop the
1109                 # user being bounced back more than once in the event that a summary
1110                 # is not required.
1111                 if( $this->missingSummary ) {
1112                         $wgOut->addHTML( "<input type=\"hidden\" name=\"wpIgnoreBlankSummary\" value=\"1\" />\n" );
1113                 }
1114
1115                 # For a bit more sophisticated detection of blank summaries, hash the
1116                 # automatic one and pass that in a hidden field.
1117                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1118                 $wgOut->addHTML( "<input type=\"hidden\" name=\"wpAutoSummary\" value=\"$autosumm\" />\n" );
1119
1120                 if ( $this->isConflict ) {
1121                         $wgOut->addWikiText( '==' . wfMsg( "yourdiff" ) . '==' );
1122
1123                         $de = new DifferenceEngine( $this->mTitle );
1124                         $de->setText( $this->textbox2, $this->textbox1 );
1125                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1126
1127                         $wgOut->addWikiText( '==' . wfMsg( "yourtext" ) . '==' );
1128                         $wgOut->addHTML( "<textarea tabindex=6 id='wpTextbox2' name=\"wpTextbox2\" rows='{$rows}' cols='{$cols}' wrap='virtual'>"
1129                                 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox2 ) ) . "\n</textarea>" );
1130                 }
1131                 $wgOut->addHTML( "</form>\n" );
1132                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1133
1134                         if ( $this->formtype == 'preview') {
1135                                 $this->showPreview();
1136                         } else {
1137                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
1138                         }
1139
1140                         if ( $this->formtype == 'diff') {
1141                                 $wgOut->addHTML( $this->getDiff() );
1142                         }
1143
1144                 }
1145
1146                 wfProfileOut( $fname );
1147         }
1148
1149         /**
1150          * Append preview output to $wgOut.
1151          * Includes category rendering if this is a category page.
1152          * @private
1153          */
1154         function showPreview() {
1155                 global $wgOut;
1156                 $wgOut->addHTML( '<div id="wikiPreview">' );
1157                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1158                         $this->mArticle->openShowCategory();
1159                 }
1160                 $previewOutput = $this->getPreviewText();
1161                 $wgOut->addHTML( $previewOutput );
1162                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1163                         $this->mArticle->closeShowCategory();
1164                 }
1165                 $wgOut->addHTML( "<br style=\"clear:both;\" />\n" );
1166                 $wgOut->addHTML( '</div>' );
1167         }
1168
1169         /**
1170          * Prepare a list of templates used by this page. Returns HTML.
1171          */
1172         function formatTemplates() {
1173                 global $wgUser;
1174
1175                 $fname = 'EditPage::formatTemplates';
1176                 wfProfileIn( $fname );
1177
1178                 $sk =& $wgUser->getSkin();
1179
1180                 $outText = '';
1181                 $templates = $this->mArticle->getUsedTemplates();
1182                 if ( count( $templates ) > 0 ) {
1183                         # Do a batch existence check
1184                         $batch = new LinkBatch;
1185                         foreach( $templates as $title ) {
1186                                 $batch->addObj( $title );
1187                         }
1188                         $batch->execute();
1189
1190                         # Construct the HTML
1191                         $outText = '<br />'. wfMsgExt( 'templatesused', array( 'parseinline' ) ) . '<ul>';
1192                         foreach ( $templates as $titleObj ) {
1193                                 $outText .= '<li>' . $sk->makeLinkObj( $titleObj ) . '</li>';
1194                         }
1195                         $outText .= '</ul>';
1196                 }
1197                 wfProfileOut( $fname );
1198                 return $outText;
1199         }
1200
1201         /**
1202          * Live Preview lets us fetch rendered preview page content and
1203          * add it to the page without refreshing the whole page.
1204          * If not supported by the browser it will fall through to the normal form
1205          * submission method.
1206          *
1207          * This function outputs a script tag to support live preview, and
1208          * returns an onclick handler which should be added to the attributes
1209          * of the preview button
1210          */
1211         function doLivePreviewScript() {
1212                 global $wgStylePath, $wgJsMimeType, $wgOut, $wgTitle;
1213                 $wgOut->addHTML( '<script type="'.$wgJsMimeType.'" src="' .
1214                         htmlspecialchars( $wgStylePath . '/common/preview.js' ) .
1215                         '"></script>' . "\n" );
1216                 $liveAction = $wgTitle->getLocalUrl( 'action=submit&wpPreview=true&live=true' );
1217                 return "return !livePreview(" .
1218                         "getElementById('wikiPreview')," .
1219                         "editform.wpTextbox1.value," .
1220                         '"' . $liveAction . '"' . ")";
1221         }
1222
1223         function getLastDelete() {
1224                 $dbr =& wfGetDB( DB_SLAVE );
1225                 $fname = 'EditPage::getLastDelete';
1226                 $res = $dbr->select(
1227                         array( 'logging', 'user' ),
1228                         array( 'log_type',
1229                                'log_action',
1230                                'log_timestamp',
1231                                'log_user',
1232                                'log_namespace',
1233                                'log_title',
1234                                'log_comment',
1235                                'log_params',
1236                                'user_name', ),
1237                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1238                                'log_title' => $this->mTitle->getDBkey(),
1239                                'log_type' => 'delete',
1240                                'log_action' => 'delete',
1241                                'user_id=log_user' ),
1242                         $fname,
1243                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
1244
1245                 if($dbr->numRows($res) == 1) {
1246                         while ( $x = $dbr->fetchObject ( $res ) )
1247                                 $data = $x;
1248                         $dbr->freeResult ( $res ) ;
1249                 } else {
1250                         $data = null;
1251                 }
1252                 return $data;
1253         }
1254
1255         /**
1256          * @todo document
1257          */
1258         function getPreviewText() {
1259                 global $wgOut, $wgUser, $wgTitle, $wgParser;
1260
1261                 $fname = 'EditPage::getPreviewText';
1262                 wfProfileIn( $fname );
1263
1264                 if ( $this->mTokenOk ) {
1265                         $msg = 'previewnote';
1266                 } else {
1267                         $msg = 'session_fail_preview';
1268                 }
1269                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
1270                         "<div class='previewnote'>" . $wgOut->parse( wfMsg( $msg ) ) . "</div>\n";
1271                 if ( $this->isConflict ) {
1272                         $previewhead.='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1273                 }
1274
1275                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1276                 $parserOptions->setEditSection( false );
1277
1278                 # don't parse user css/js, show message about preview
1279                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1280
1281                 if ( $this->isCssJsSubpage ) {
1282                         if(preg_match("/\\.css$/", $wgTitle->getText() ) ) {
1283                                 $previewtext = wfMsg('usercsspreview');
1284                         } else if(preg_match("/\\.js$/", $wgTitle->getText() ) ) {
1285                                 $previewtext = wfMsg('userjspreview');
1286                         }
1287                         $parserOptions->setTidy(true);
1288                         $parserOutput = $wgParser->parse( $previewtext , $wgTitle, $parserOptions );
1289                         $wgOut->addHTML( $parserOutput->mText );
1290                         wfProfileOut( $fname );
1291                         return $previewhead;
1292                 } else {
1293                         # if user want to see preview when he edit an article
1294                         if( $wgUser->getOption('previewonfirst') and ($this->textbox1 == '')) {
1295                                 $this->textbox1 = $this->mArticle->getContent();
1296                         }
1297
1298                         $toparse = $this->textbox1;
1299
1300                         # If we're adding a comment, we need to show the
1301                         # summary as the headline
1302                         if($this->section=="new" && $this->summary!="") {
1303                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1304                         }
1305
1306                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData ;
1307                         $parserOptions->setTidy(true);
1308                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ) ."\n\n",
1309                                         $wgTitle, $parserOptions );
1310
1311                         $previewHTML = $parserOutput->getText();
1312                         $wgOut->addParserOutputNoText( $parserOutput );
1313
1314                         wfProfileOut( $fname );
1315                         return $previewhead . $previewHTML;
1316                 }
1317         }
1318
1319         /**
1320          * Call the stock "user is blocked" page
1321          */
1322         function blockedIPpage() {
1323                 global $wgOut;
1324                 $wgOut->blockedPage();
1325         }
1326
1327         /**
1328          * Produce the stock "please login to edit pages" page
1329          */
1330         function userNotLoggedInPage() {
1331                 global $wgUser, $wgOut;
1332                 $skin = $wgUser->getSkin();
1333
1334                 $loginTitle = Title::makeTitle( NS_SPECIAL, 'Userlogin' );
1335                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $this->mTitle->getPrefixedUrl() );
1336
1337                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1338                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1339                 $wgOut->setArticleRelated( false );
1340
1341                 $wgOut->addHtml( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
1342                 $wgOut->returnToMain( false, $this->mTitle->getPrefixedUrl() );
1343         }
1344
1345         /**
1346          * Creates a basic error page which informs the user that
1347          * they have to validate their email address before being
1348          * allowed to edit.
1349          */
1350         function userNotConfirmedPage() {
1351                 global $wgOut;
1352
1353                 $wgOut->setPageTitle( wfMsg( 'confirmedittitle' ) );
1354                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1355                 $wgOut->setArticleRelated( false );
1356
1357                 $wgOut->addWikiText( wfMsg( 'confirmedittext' ) );
1358                 $wgOut->returnToMain( false );
1359         }
1360
1361         /**
1362          * Produce the stock "your edit contains spam" page
1363          *
1364          * @param $match Text which triggered one or more filters
1365          */
1366         function spamPage( $match = false ) {
1367                 global $wgOut;
1368
1369                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1370                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1371                 $wgOut->setArticleRelated( false );
1372
1373                 $wgOut->addWikiText( wfMsg( 'spamprotectiontext' ) );
1374                 if ( $match )
1375                         $wgOut->addWikiText( wfMsg( 'spamprotectionmatch', "<nowiki>{$match}</nowiki>" ) );
1376
1377                 $wgOut->returnToMain( false );
1378         }
1379
1380         /**
1381          * @private
1382          * @todo document
1383          */
1384         function mergeChangesInto( &$editText ){
1385                 $fname = 'EditPage::mergeChangesInto';
1386                 wfProfileIn( $fname );
1387
1388                 $db =& wfGetDB( DB_MASTER );
1389
1390                 // This is the revision the editor started from
1391                 $baseRevision = Revision::loadFromTimestamp(
1392                         $db, $this->mArticle->mTitle, $this->edittime );
1393                 if( is_null( $baseRevision ) ) {
1394                         wfProfileOut( $fname );
1395                         return false;
1396                 }
1397                 $baseText = $baseRevision->getText();
1398
1399                 // The current state, we want to merge updates into it
1400                 $currentRevision =  Revision::loadFromTitle(
1401                         $db, $this->mArticle->mTitle );
1402                 if( is_null( $currentRevision ) ) {
1403                         wfProfileOut( $fname );
1404                         return false;
1405                 }
1406                 $currentText = $currentRevision->getText();
1407
1408                 if( wfMerge( $baseText, $editText, $currentText, $result ) ){
1409                         $editText = $result;
1410                         wfProfileOut( $fname );
1411                         return true;
1412                 } else {
1413                         wfProfileOut( $fname );
1414                         return false;
1415                 }
1416         }
1417
1418         /**
1419          * Check if the browser is on a blacklist of user-agents known to
1420          * mangle UTF-8 data on form submission. Returns true if Unicode
1421          * should make it through, false if it's known to be a problem.
1422          * @return bool
1423          * @private
1424          */
1425         function checkUnicodeCompliantBrowser() {
1426                 global $wgBrowserBlackList;
1427                 if( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
1428                         // No User-Agent header sent? Trust it by default...
1429                         return true;
1430                 }
1431                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1432                 foreach ( $wgBrowserBlackList as $browser ) {
1433                         if ( preg_match($browser, $currentbrowser) ) {
1434                                 return false;
1435                         }
1436                 }
1437                 return true;
1438         }
1439
1440         /**
1441          * Format an anchor fragment as it would appear for a given section name
1442          * @param string $text
1443          * @return string
1444          * @private
1445          */
1446         function sectionAnchor( $text ) {
1447                 $headline = Sanitizer::decodeCharReferences( $text );
1448                 # strip out HTML
1449                 $headline = preg_replace( '/<.*?' . '>/', '', $headline );
1450                 $headline = trim( $headline );
1451                 $sectionanchor = '#' . urlencode( str_replace( ' ', '_', $headline ) );
1452                 $replacearray = array(
1453                         '%3A' => ':',
1454                         '%' => '.'
1455                 );
1456                 return str_replace(
1457                         array_keys( $replacearray ),
1458                         array_values( $replacearray ),
1459                         $sectionanchor );
1460         }
1461
1462         /**
1463          * Shows a bulletin board style toolbar for common editing functions.
1464          * It can be disabled in the user preferences.
1465          * The necessary JavaScript code can be found in style/wikibits.js.
1466          */
1467         function getEditToolbar() {
1468                 global $wgStylePath, $wgContLang, $wgJsMimeType;
1469
1470                 /**
1471                  * toolarray an array of arrays which each include the filename of
1472                  * the button image (without path), the opening tag, the closing tag,
1473                  * and optionally a sample text that is inserted between the two when no
1474                  * selection is highlighted.
1475                  * The tip text is shown when the user moves the mouse over the button.
1476                  *
1477                  * Already here are accesskeys (key), which are not used yet until someone
1478                  * can figure out a way to make them work in IE. However, we should make
1479                  * sure these keys are not defined on the edit page.
1480                  */
1481                 $toolarray=array(
1482                         array(  'image'=>'button_bold.png',
1483                                         'open'  =>      "\'\'\'",
1484                                         'close' =>      "\'\'\'",
1485                                         'sample'=>      wfMsg('bold_sample'),
1486                                         'tip'   =>      wfMsg('bold_tip'),
1487                                         'key'   =>      'B'
1488                                 ),
1489                         array(  'image'=>'button_italic.png',
1490                                         'open'  =>      "\'\'",
1491                                         'close' =>      "\'\'",
1492                                         'sample'=>      wfMsg('italic_sample'),
1493                                         'tip'   =>      wfMsg('italic_tip'),
1494                                         'key'   =>      'I'
1495                                 ),
1496                         array(  'image'=>'button_link.png',
1497                                         'open'  =>      '[[',
1498                                         'close' =>      ']]',
1499                                         'sample'=>      wfMsg('link_sample'),
1500                                         'tip'   =>      wfMsg('link_tip'),
1501                                         'key'   =>      'L'
1502                                 ),
1503                         array(  'image'=>'button_extlink.png',
1504                                         'open'  =>      '[',
1505                                         'close' =>      ']',
1506                                         'sample'=>      wfMsg('extlink_sample'),
1507                                         'tip'   =>      wfMsg('extlink_tip'),
1508                                         'key'   =>      'X'
1509                                 ),
1510                         array(  'image'=>'button_headline.png',
1511                                         'open'  =>      "\\n== ",
1512                                         'close' =>      " ==\\n",
1513                                         'sample'=>      wfMsg('headline_sample'),
1514                                         'tip'   =>      wfMsg('headline_tip'),
1515                                         'key'   =>      'H'
1516                                 ),
1517                         array(  'image'=>'button_image.png',
1518                                         'open'  =>      '[['.$wgContLang->getNsText(NS_IMAGE).":",
1519                                         'close' =>      ']]',
1520                                         'sample'=>      wfMsg('image_sample'),
1521                                         'tip'   =>      wfMsg('image_tip'),
1522                                         'key'   =>      'D'
1523                                 ),
1524                         array(  'image' =>'button_media.png',
1525                                         'open'  =>      '[['.$wgContLang->getNsText(NS_MEDIA).':',
1526                                         'close' =>      ']]',
1527                                         'sample'=>      wfMsg('media_sample'),
1528                                         'tip'   =>      wfMsg('media_tip'),
1529                                         'key'   =>      'M'
1530                                 ),
1531                         array(  'image' =>'button_math.png',
1532                                         'open'  =>      "<math>",
1533                                         'close' =>      "<\\/math>",
1534                                         'sample'=>      wfMsg('math_sample'),
1535                                         'tip'   =>      wfMsg('math_tip'),
1536                                         'key'   =>      'C'
1537                                 ),
1538                         array(  'image' =>'button_nowiki.png',
1539                                         'open'  =>      "<nowiki>",
1540                                         'close' =>      "<\\/nowiki>",
1541                                         'sample'=>      wfMsg('nowiki_sample'),
1542                                         'tip'   =>      wfMsg('nowiki_tip'),
1543                                         'key'   =>      'N'
1544                                 ),
1545                         array(  'image' =>'button_sig.png',
1546                                         'open'  =>      '--~~~~',
1547                                         'close' =>      '',
1548                                         'sample'=>      '',
1549                                         'tip'   =>      wfMsg('sig_tip'),
1550                                         'key'   =>      'Y'
1551                                 ),
1552                         array(  'image' =>'button_hr.png',
1553                                         'open'  =>      "\\n----\\n",
1554                                         'close' =>      '',
1555                                         'sample'=>      '',
1556                                         'tip'   =>      wfMsg('hr_tip'),
1557                                         'key'   =>      'R'
1558                                 )
1559                 );
1560                 $toolbar = "<div id='toolbar'>\n";
1561                 $toolbar.="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
1562
1563                 foreach($toolarray as $tool) {
1564
1565                         $image=$wgStylePath.'/common/images/'.$tool['image'];
1566                         $open=$tool['open'];
1567                         $close=$tool['close'];
1568                         $sample = wfEscapeJsString( $tool['sample'] );
1569
1570                         // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
1571                         // Older browsers show a "speedtip" type message only for ALT.
1572                         // Ideally these should be different, realistically they
1573                         // probably don't need to be.
1574                         $tip = wfEscapeJsString( $tool['tip'] );
1575
1576                         #$key = $tool["key"];
1577
1578                         $toolbar.="addButton('$image','$tip','$open','$close','$sample');\n";
1579                 }
1580
1581                 $toolbar.="/*]]>*/\n</script>";
1582                 $toolbar.="\n</div>";
1583                 return $toolbar;
1584         }
1585
1586         /**
1587          * Output preview text only. This can be sucked into the edit page
1588          * via JavaScript, and saves the server time rendering the skin as
1589          * well as theoretically being more robust on the client (doesn't
1590          * disturb the edit box's undo history, won't eat your text on
1591          * failure, etc).
1592          *
1593          * @todo This doesn't include category or interlanguage links.
1594          *       Would need to enhance it a bit, maybe wrap them in XML
1595          *       or something... that might also require more skin
1596          *       initialization, so check whether that's a problem.
1597          */
1598         function livePreview() {
1599                 global $wgOut;
1600                 $wgOut->disable();
1601                 header( 'Content-type: text/xml' );
1602                 header( 'Cache-control: no-cache' );
1603                 # FIXME
1604                 echo $this->getPreviewText( );
1605                 /* To not shake screen up and down between preview and live-preview */
1606                 echo "<br style=\"clear:both;\" />\n";
1607         }
1608
1609
1610         /**
1611          * Get a diff between the current contents of the edit box and the
1612          * version of the page we're editing from.
1613          *
1614          * If this is a section edit, we'll replace the section as for final
1615          * save and then make a comparison.
1616          *
1617          * @return string HTML
1618          */
1619         function getDiff() {
1620                 $oldtext = $this->mArticle->fetchContent();
1621                 $newtext = $this->mArticle->replaceSection(
1622                         $this->section, $this->textbox1, $this->summary, $this->edittime );
1623                 $newtext = $this->mArticle->preSaveTransform( $newtext );
1624                 $oldtitle = wfMsgExt( 'currentrev', array('parseinline') );
1625                 $newtitle = wfMsgExt( 'yourtext', array('parseinline') );
1626                 if ( $oldtext !== false  || $newtext != '' ) {
1627                         $de = new DifferenceEngine( $this->mTitle );
1628                         $de->setText( $oldtext, $newtext );
1629                         $difftext = $de->getDiff( $oldtitle, $newtitle );
1630                 } else {
1631                         $difftext = '';
1632                 }
1633
1634                 return '<div id="wikiDiff">' . $difftext . '</div>';
1635         }
1636
1637         /**
1638          * Filter an input field through a Unicode de-armoring process if it
1639          * came from an old browser with known broken Unicode editing issues.
1640          *
1641          * @param WebRequest $request
1642          * @param string $field
1643          * @return string
1644          * @private
1645          */
1646         function safeUnicodeInput( $request, $field ) {
1647                 $text = rtrim( $request->getText( $field ) );
1648                 return $request->getBool( 'safemode' )
1649                         ? $this->unmakesafe( $text )
1650                         : $text;
1651         }
1652
1653         /**
1654          * Filter an output field through a Unicode armoring process if it is
1655          * going to an old browser with known broken Unicode editing issues.
1656          *
1657          * @param string $text
1658          * @return string
1659          * @private
1660          */
1661         function safeUnicodeOutput( $text ) {
1662                 global $wgContLang;
1663                 $codedText = $wgContLang->recodeForEdit( $text );
1664                 return $this->checkUnicodeCompliantBrowser()
1665                         ? $codedText
1666                         : $this->makesafe( $codedText );
1667         }
1668
1669         /**
1670          * A number of web browsers are known to corrupt non-ASCII characters
1671          * in a UTF-8 text editing environment. To protect against this,
1672          * detected browsers will be served an armored version of the text,
1673          * with non-ASCII chars converted to numeric HTML character references.
1674          *
1675          * Preexisting such character references will have a 0 added to them
1676          * to ensure that round-trips do not alter the original data.
1677          *
1678          * @param string $invalue
1679          * @return string
1680          * @private
1681          */
1682         function makesafe( $invalue ) {
1683                 // Armor existing references for reversability.
1684                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
1685
1686                 $bytesleft = 0;
1687                 $result = "";
1688                 $working = 0;
1689                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1690                         $bytevalue = ord( $invalue{$i} );
1691                         if( $bytevalue <= 0x7F ) { //0xxx xxxx
1692                                 $result .= chr( $bytevalue );
1693                                 $bytesleft = 0;
1694                         } elseif( $bytevalue <= 0xBF ) { //10xx xxxx
1695                                 $working = $working << 6;
1696                                 $working += ($bytevalue & 0x3F);
1697                                 $bytesleft--;
1698                                 if( $bytesleft <= 0 ) {
1699                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
1700                                 }
1701                         } elseif( $bytevalue <= 0xDF ) { //110x xxxx
1702                                 $working = $bytevalue & 0x1F;
1703                                 $bytesleft = 1;
1704                         } elseif( $bytevalue <= 0xEF ) { //1110 xxxx
1705                                 $working = $bytevalue & 0x0F;
1706                                 $bytesleft = 2;
1707                         } else { //1111 0xxx
1708                                 $working = $bytevalue & 0x07;
1709                                 $bytesleft = 3;
1710                         }
1711                 }
1712                 return $result;
1713         }
1714
1715         /**
1716          * Reverse the previously applied transliteration of non-ASCII characters
1717          * back to UTF-8. Used to protect data from corruption by broken web browsers
1718          * as listed in $wgBrowserBlackList.
1719          *
1720          * @param string $invalue
1721          * @return string
1722          * @private
1723          */
1724         function unmakesafe( $invalue ) {
1725                 $result = "";
1726                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1727                         if( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
1728                                 $i += 3;
1729                                 $hexstring = "";
1730                                 do {
1731                                         $hexstring .= $invalue{$i};
1732                                         $i++;
1733                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
1734
1735                                 // Do some sanity checks. These aren't needed for reversability,
1736                                 // but should help keep the breakage down if the editor
1737                                 // breaks one of the entities whilst editing.
1738                                 if ((substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6)) {
1739                                         $codepoint = hexdec($hexstring);
1740                                         $result .= codepointToUtf8( $codepoint );
1741                                 } else {
1742                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
1743                                 }
1744                         } else {
1745                                 $result .= substr( $invalue, $i, 1 );
1746                         }
1747                 }
1748                 // reverse the transform that we made for reversability reasons.
1749                 return strtr( $result, array( "&#x0" => "&#x" ) );
1750         }
1751
1752         function noCreatePermission() {
1753                 global $wgOut;
1754                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
1755                 $wgOut->addWikiText( wfMsg( 'nocreatetext' ) );
1756         }
1757
1758 }
1759
1760 ?>