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 = false;
  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->tokenOk( $request ) ) {
 362                                         # Some browsers will not report any submit button
 363                                         # if the user hits enter in the comment box.
 364                                         # The unmarked state will be assumed to be a save,
 365                                         # if the form seems otherwise complete.
 366                                         wfDebug( "$fname: Passed token check.\n" );
 367                                 } else {
 368                                         # Page might be a hack attempt posted from
 369                                         # an external site. Preview instead of saving.
 370                                         wfDebug( "$fname: Failed token check; forcing preview\n" );
 371                                         $this->preview = true;
 372                                 }
 373                         }
 374                         $this->save    = ! ( $this->preview OR $this->diff );
 375                         if( !preg_match( '/^\d{14}$/', $this->edittime )) {
 376                                 $this->edittime = null;
 377                         }
 378
 379                         if( !preg_match( '/^\d{14}$/', $this->starttime )) {
 380                                 $this->starttime = null;
 381                         }
 382
 383                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 384
 385                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 386                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 387
 388                         # Don't force edit summaries when a user is editing their own user or talk page
 389                         if( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) && $this->mTitle->getText() == $wgUser->getName() ) {
 390                                 $this->allowBlankSummary = true;
 391                         } else {
 392                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' );
 393                         }
 394
 395                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 396                 } else {
 397                         # Not a posted form? Start with nothing.
 398                         wfDebug( "$fname: Not a posted form.\n" );
 399                         $this->textbox1  = '';
 400                         $this->textbox2  = '';
 401                         $this->mMetaData = '';
 402                         $this->summary   = '';
 403                         $this->edittime  = '';
 404                         $this->starttime = wfTimestampNow();
 405                         $this->preview   = false;
 406                         $this->save      = false;
 407                         $this->diff      = false;
 408                         $this->minoredit = false;
 409                         $this->watchthis = false;
 410                         $this->recreate  = false;
 411                 }
 412
 413                 $this->oldid = $request->getInt( 'oldid' );
 414
 415                 # Section edit can come from either the form or a link
 416                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 417
 418                 $this->live = $request->getCheck( 'live' );
 419                 $this->editintro = $request->getText( 'editintro' );
 420
 421                 wfProfileOut( $fname );
 422         }
 423
 424         /**
 425          * Make sure the form isn't faking a user's credentials.
 426          *
 427          * @param $request WebRequest
 428          * @return bool
 429          * @private
 430          */
 431         function tokenOk( &$request ) {
 432                 global $wgUser;
 433                 if( $wgUser->isAnon() ) {
 434                         # Anonymous users may not have a session
 435                         # open. Don't tokenize.
 436                         $this->mTokenOk = true;
 437                 } else {
 438                         $this->mTokenOk = $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
 439                 }
 440                 return $this->mTokenOk;
 441         }
 442
 443         /** */
 444         function showIntro() {
 445                 global $wgOut, $wgUser;
 446                 $addstandardintro=true;
 447                 if($this->editintro) {
 448                         $introtitle=Title::newFromText($this->editintro);
 449                         if(isset($introtitle) && $introtitle->userCanRead()) {
 450                                 $rev=Revision::newFromTitle($introtitle);
 451                                 if($rev) {
 452                                         $wgOut->addSecondaryWikiText($rev->getText());
 453                                         $addstandardintro=false;
 454                                 }
 455                         }
 456                 }
 457                 if($addstandardintro) {
 458                         if ( $wgUser->isLoggedIn() )
 459                                 $wgOut->addWikiText( wfMsg( 'newarticletext' ) );
 460                         else
 461                                 $wgOut->addWikiText( wfMsg( 'newarticletextanon' ) );
 462                 }
 463         }
 464
 465         /**
 466          * Attempt submission
 467          * @return bool false if output is done, true if the rest of the form should be displayed
 468          */
 469         function attemptSave() {
 470                 global $wgSpamRegex, $wgFilterCallback, $wgUser, $wgOut;
 471                 global $wgMaxArticleSize;
 472
 473                 $fname = 'EditPage::attemptSave';
 474                 wfProfileIn( $fname );
 475                 wfProfileIn( "$fname-checks" );
 476
 477                 # Reintegrate metadata
 478                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 479                 $this->mMetaData = '' ;
 480
 481                 # Check for spam
 482                 if ( $wgSpamRegex && preg_match( $wgSpamRegex, $this->textbox1, $matches ) ) {
 483                         $this->spamPage ( $matches[0] );
 484                         wfProfileOut( "$fname-checks" );
 485                         wfProfileOut( $fname );
 486                         return false;
 487                 }
 488                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section ) ) {
 489                         # Error messages or other handling should be performed by the filter function
 490                         wfProfileOut( $fname );
 491                         wfProfileOut( "$fname-checks" );
 492                         return false;
 493                 }
 494                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError ) ) ) {
 495                         # Error messages etc. could be handled within the hook...
 496                         wfProfileOut( $fname );
 497                         wfProfileOut( "$fname-checks" );
 498                         return false;
 499                 } elseif( $this->hookError != '' ) {
 500                         # ...or the hook could be expecting us to produce an error
 501                         wfProfileOut( "$fname-checks " );
 502                         wfProfileOut( $fname );
 503                         return true;
 504                 }
 505                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 506                         # Check block state against master, thus 'false'.
 507                         $this->blockedIPpage();
 508                         wfProfileOut( "$fname-checks" );
 509                         wfProfileOut( $fname );
 510                         return false;
 511                 }
 512                 $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 513                 if ( $this->kblength > $wgMaxArticleSize ) {
 514                         // Error will be displayed by showEditForm()
 515                         $this->tooBig = true;
 516                         wfProfileOut( "$fname-checks" );
 517                         wfProfileOut( $fname );
 518                         return true;
 519                 }
 520
 521                 if ( !$wgUser->isAllowed('edit') ) {
 522                         if ( $wgUser->isAnon() ) {
 523                                 $this->userNotLoggedInPage();
 524                                 wfProfileOut( "$fname-checks" );
 525                                 wfProfileOut( $fname );
 526                                 return false;
 527                         }
 528                         else {
 529                                 $wgOut->readOnlyPage();
 530                                 wfProfileOut( "$fname-checks" );
 531                                 wfProfileOut( $fname );
 532                                 return false;
 533                         }
 534                 }
 535
 536                 if ( wfReadOnly() ) {
 537                         $wgOut->readOnlyPage();
 538                         wfProfileOut( "$fname-checks" );
 539                         wfProfileOut( $fname );
 540                         return false;
 541                 }
 542                 if ( $wgUser->pingLimiter() ) {
 543                         $wgOut->rateLimited();
 544                         wfProfileOut( "$fname-checks" );
 545                         wfProfileOut( $fname );
 546                         return false;
 547                 }
 548
 549                 # If the article has been deleted while editing, don't save it without
 550                 # confirmation
 551                 if ( $this->deletedSinceEdit && !$this->recreate ) {
 552                         wfProfileOut( "$fname-checks" );
 553                         wfProfileOut( $fname );
 554                         return true;
 555                 }
 556
 557                 wfProfileOut( "$fname-checks" );
 558
 559                 # If article is new, insert it.
 560                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 561                 if ( 0 == $aid ) {
 562                         // Late check for create permission, just in case *PARANOIA*
 563                         if ( !$this->mTitle->userCan( 'create' ) ) {
 564                                 wfDebug( "$fname: no create permission\n" );
 565                                 $this->noCreatePermission();
 566                                 wfProfileOut( $fname );
 567                                 return;
 568                         }
 569
 570                         # Don't save a new article if it's blank.
 571                         if ( ( '' == $this->textbox1 ) ) {
 572                                         $wgOut->redirect( $this->mTitle->getFullURL() );
 573                                         wfProfileOut( $fname );
 574                                         return false;
 575                         }
 576
 577                         # If no edit comment was given when creating a new page, and what's being
 578                         # created is a redirect, be smart and fill in a neat auto-comment
 579                         if( $this->summary == '' ) {
 580                                 $rt = Title::newFromRedirect( $this->textbox1 );
 581                                 if( is_object( $rt ) )
 582                                         $this->summary = wfMsgForContent( 'autoredircomment', $rt->getPrefixedText() );
 583                         }
 584
 585                         $isComment=($this->section=='new');
 586                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 587                                 $this->minoredit, $this->watchthis, false, $isComment);
 588
 589                         wfProfileOut( $fname );
 590                         return false;
 591                 }
 592
 593                 # Article exists. Check for edit conflict.
 594
 595                 $this->mArticle->clear(); # Force reload of dates, etc.
 596                 $this->mArticle->forUpdate( true ); # Lock the article
 597
 598                 if( $this->mArticle->getTimestamp() != $this->edittime ) {
 599                         $this->isConflict = true;
 600                         if( $this->section == 'new' ) {
 601                                 if( $this->mArticle->getUserText() == $wgUser->getName() &&
 602                                         $this->mArticle->getComment() == $this->summary ) {
 603                                         // Probably a duplicate submission of a new comment.
 604                                         // This can happen when squid resends a request after
 605                                         // a timeout but the first one actually went through.
 606                                         wfDebug( "EditPage::editForm duplicate new section submission; trigger edit conflict!\n" );
 607                                 } else {
 608                                         // New comment; suppress conflict.
 609                                         $this->isConflict = false;
 610                                         wfDebug( "EditPage::editForm conflict suppressed; new section\n" );
 611                                 }
 612                         }
 613                 }
 614                 $userid = $wgUser->getID();
 615
 616                 if ( $this->isConflict) {
 617                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 618                                 $this->mArticle->getTimestamp() . "'\n" );
 619                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime);
 620                 }
 621                 else {
 622                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 623                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary);
 624                 }
 625                 if( is_null( $text ) ) {
 626                         wfDebug( "EditPage::editForm activating conflict; section replace failed.\n" );
 627                         $this->isConflict = true;
 628                         $text = $this->textbox1;
 629                 }
 630
 631                 # Suppress edit conflict with self, except for section edits where merging is required.
 632                 if ( ( $this->section == '' ) && ( 0 != $userid ) && ( $this->mArticle->getUser() == $userid ) ) {
 633                         wfDebug( "Suppressing edit conflict, same user.\n" );
 634                         $this->isConflict = false;
 635                 } else {
 636                         # switch from section editing to normal editing in edit conflict
 637                         if($this->isConflict) {
 638                                 # Attempt merge
 639                                 if( $this->mergeChangesInto( $text ) ){
 640                                         // Successful merge! Maybe we should tell the user the good news?
 641                                         $this->isConflict = false;
 642                                         wfDebug( "Suppressing edit conflict, successful merge.\n" );
 643                                 } else {
 644                                         $this->section = '';
 645                                         $this->textbox1 = $text;
 646                                         wfDebug( "Keeping edit conflict, failed merge.\n" );
 647                                 }
 648                         }
 649                 }
 650
 651                 if ( $this->isConflict ) {
 652                         wfProfileOut( $fname );
 653                         return true;
 654                 }
 655
 656                 # Handle the user preference to force summaries here
 657                 if( $this->section != 'new' && !$this->allowBlankSummary && $wgUser->getOption( 'forceeditsummary' ) ) {
 658                         if( md5( $this->summary ) == $this->autoSumm ) {
 659                                 $this->missingSummary = true;
 660                                 wfProfileOut( $fname );
 661                                 return( true );
 662                         }
 663                 }
 664
 665                 # All's well
 666                 wfProfileIn( "$fname-sectionanchor" );
 667                 $sectionanchor = '';
 668                 if( $this->section == 'new' ) {
 669                         if ( $this->textbox1 == '' ) {
 670                                 $this->missingComment = true;
 671                                 return true;
 672                         }
 673                         if( $this->summary != '' ) {
 674                                 $sectionanchor = $this->sectionAnchor( $this->summary );
 675                         }
 676                 } elseif( $this->section != '' ) {
 677                         # Try to get a section anchor from the section source, redirect to edited section if header found
 678                         # XXX: might be better to integrate this into Article::replaceSection
 679                         # for duplicate heading checking and maybe parsing
 680                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 681                         # we can't deal with anchors, includes, html etc in the header for now,
 682                         # headline would need to be parsed to improve this
 683                         if($hasmatch and strlen($matches[2]) > 0) {
 684                                 $sectionanchor = $this->sectionAnchor( $matches[2] );
 685                         }
 686                 }
 687                 wfProfileOut( "$fname-sectionanchor" );
 688
 689                 // Save errors may fall down to the edit form, but we've now
 690                 // merged the section into full text. Clear the section field
 691                 // so that later submission of conflict forms won't try to
 692                 // replace that into a duplicated mess.
 693                 $this->textbox1 = $text;
 694                 $this->section = '';
 695
 696                 // Check for length errors again now that the section is merged in
 697                 $this->kblength = (int)(strlen( $text ) / 1024);
 698                 if ( $this->kblength > $wgMaxArticleSize ) {
 699                         $this->tooBig = true;
 700                         wfProfileOut( $fname );
 701                         return true;
 702                 }
 703
 704                 # update the article here
 705                 if( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
 706                         $this->watchthis, '', $sectionanchor ) ) {
 707                         wfProfileOut( $fname );
 708                         return false;
 709                 } else {
 710                         $this->isConflict = true;
 711                 }
 712                 wfProfileOut( $fname );
 713                 return true;
 714         }
 715
 716         /**
 717          * Initialise form fields in the object
 718          * Called on the first invocation, e.g. when a user clicks an edit link
 719          */
 720         function initialiseForm() {
 721                 $this->edittime = $this->mArticle->getTimestamp();
 722                 $this->textbox1 = $this->mArticle->getContent();
 723                 $this->summary = '';
 724                 if ( !$this->mArticle->exists() && $this->mArticle->mTitle->getNamespace() == NS_MEDIAWIKI )
 725                         $this->textbox1 = wfMsgWeirdKey ( $this->mArticle->mTitle->getText() ) ;
 726                 wfProxyCheck();
 727         }
 728
 729         /**
 730          * Send the edit form and related headers to $wgOut
 731          * @param $formCallback Optional callable that takes an OutputPage
 732          *                      parameter; will be called during form output
 733          *                      near the top, for captchas and the like.
 734          */
 735         function showEditForm( $formCallback=null ) {
 736                 global $wgOut, $wgUser, $wgLang, $wgContLang, $wgMaxArticleSize;
 737
 738                 $fname = 'EditPage::showEditForm';
 739                 wfProfileIn( $fname );
 740
 741                 $sk =& $wgUser->getSkin();
 742
 743                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) ) ;
 744
 745                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 746
 747                 # Enabled article-related sidebar, toplinks, etc.
 748                 $wgOut->setArticleRelated( true );
 749
 750                 if ( $this->isConflict ) {
 751                         $s = wfMsg( 'editconflict', $this->mTitle->getPrefixedText() );
 752                         $wgOut->setPageTitle( $s );
 753                         $wgOut->addWikiText( wfMsg( 'explainconflict' ) );
 754
 755                         $this->textbox2 = $this->textbox1;
 756                         $this->textbox1 = $this->mArticle->getContent();
 757                         $this->edittime = $this->mArticle->getTimestamp();
 758                 } else {
 759
 760                         if( $this->section != '' ) {
 761                                 if( $this->section == 'new' ) {
 762                                         $s = wfMsg('editingcomment', $this->mTitle->getPrefixedText() );
 763                                 } else {
 764                                         $s = wfMsg('editingsection', $this->mTitle->getPrefixedText() );
 765                                         if( !$this->preview && !$this->diff ) {
 766                                                 preg_match( "/^(=+)(.+)\\1/mi",
 767                                                         $this->textbox1,
 768                                                         $matches );
 769                                                 if( !empty( $matches[2] ) ) {
 770                                                         $this->summary = "/* ". trim($matches[2])." */ ";
 771                                                 }
 772                                         }
 773                                 }
 774                         } else {
 775                                 $s = wfMsg( 'editing', $this->mTitle->getPrefixedText() );
 776                         }
 777                         $wgOut->setPageTitle( $s );
 778
 779                         if ( $this->missingComment ) {
 780                                 $wgOut->addWikiText( wfMsg( 'missingcommenttext' ) );
 781                         }
 782
 783                         if( $this->missingSummary ) {
 784                                 $wgOut->addWikiText( wfMsg( 'missingsummary' ) );
 785                         }
 786
 787                         if( !$this->hookError == '' ) {
 788                                 $wgOut->addWikiText( $this->hookError );
 789                         }
 790
 791                         if ( !$this->checkUnicodeCompliantBrowser() ) {
 792                                 $wgOut->addWikiText( wfMsg( 'nonunicodebrowser') );
 793                         }
 794                         if ( isset( $this->mArticle )
 795                              && isset( $this->mArticle->mRevision )
 796                              && !$this->mArticle->mRevision->isCurrent() ) {
 797                                 $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
 798                                 $wgOut->addWikiText( wfMsg( 'editingold' ) );
 799                         }
 800                 }
 801
 802                 if( wfReadOnly() ) {
 803                         $wgOut->addWikiText( wfMsg( 'readonlywarning' ) );
 804                 } elseif( $wgUser->isAnon() && $this->formtype != 'preview' ) {
 805                         $wgOut->addWikiText( wfMsg( 'anoneditwarning' ) );
 806                 } else {
 807                         if( $this->isCssJsSubpage && $this->formtype != 'preview' ) {
 808                                 # Check the skin exists
 809                                 if( $this->isValidCssJsSubpage ) {
 810                                         $wgOut->addWikiText( wfMsg( 'usercssjsyoucanpreview' ) );
 811                                 } else {
 812                                         $wgOut->addWikiText( wfMsg( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
 813                                 }
 814                         }
 815                 }
 816
 817                 if( $this->mTitle->isProtected( 'edit' ) ) {
 818                         # Is the protection due to the namespace, e.g. interface text?
 819                         if( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 820                                 # Yes; remind the user
 821                                 $notice = wfMsg( 'editinginterface' );
 822                         } elseif( $this->mTitle->isSemiProtected() ) {
 823                                 # No; semi protected
 824                                 $notice = wfMsg( 'semiprotectedpagewarning' );
 825                                 if( wfEmptyMsg( 'semiprotectedpagewarning', $notice ) || $notice == '-' ) {
 826                                         $notice = '';
 827                                 }
 828                         } else {
 829                                 # No; regular protection
 830                                 $notice = wfMsg( 'protectedpagewarning' );
 831                         }
 832                         $wgOut->addWikiText( $notice );
 833                 }
 834
 835                 if ( $this->kblength === false ) {
 836                         $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 837                 }
 838                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
 839                         $wgOut->addWikiText( wfMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgMaxArticleSize ) );
 840                 } elseif( $this->kblength > 29 ) {
 841                         $wgOut->addWikiText( wfMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) ) );
 842                 }
 843
 844                 $rows = $wgUser->getIntOption( 'rows' );
 845                 $cols = $wgUser->getIntOption( 'cols' );
 846
 847                 $ew = $wgUser->getOption( 'editwidth' );
 848                 if ( $ew ) $ew = " style=\"width:100%\"";
 849                 else $ew = '';
 850
 851                 $q = 'action=submit';
 852                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
 853                 $action = $this->mTitle->escapeLocalURL( $q );
 854
 855                 $summary = wfMsg('summary');
 856                 $subject = wfMsg('subject');
 857                 $minor   = wfMsgExt('minoredit', array('parseinline'));
 858                 $watchthis = wfMsgExt('watchthis', array('parseinline'));
 859
 860                 $cancel = $sk->makeKnownLink( $this->mTitle->getPrefixedText(),
 861                                 wfMsgExt('cancel', array('parseinline')) );
 862                 $edithelpurl = $sk->makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ));
 863                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
 864                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
 865                         htmlspecialchars( wfMsg( 'newwindow' ) );
 866
 867                 global $wgRightsText;
 868                 $copywarn = "<div id=\"editpage-copywarn\">\n" .
 869                         wfMsg( $wgRightsText ? 'copyrightwarning' : 'copyrightwarning2',
 870                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
 871                                 $wgRightsText ) . "\n</div>";
 872
 873                 if( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
 874                         # prepare toolbar for edit buttons
 875                         $toolbar = $this->getEditToolbar();
 876                 } else {
 877                         $toolbar = '';
 878                 }
 879
 880                 // activate checkboxes if user wants them to be always active
 881                 if( !$this->preview && !$this->diff ) {
 882                         # Sort out the "watch" checkbox
 883                         if( $wgUser->getOption( 'watchdefault' ) ) {
 884                                 # Watch all edits
 885                                 $this->watchthis = true;
 886                         } elseif( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 887                                 # Watch creations
 888                                 $this->watchthis = true;
 889                         } elseif( $this->mTitle->userIsWatching() ) {
 890                                 # Already watched
 891                                 $this->watchthis = true;
 892                         }
 893
 894                         if( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
 895                 }
 896
 897                 $minoredithtml = '';
 898
 899                 if ( $wgUser->isAllowed('minoredit') ) {
 900                         $minoredithtml =
 901                                 "<input tabindex='3' type='checkbox' value='1' name='wpMinoredit'".($this->minoredit?" checked='checked'":"").
 902                                 " accesskey='".wfMsg('accesskey-minoredit')."' id='wpMinoredit' />\n".
 903                                 "<label for='wpMinoredit' title='".wfMsg('tooltip-minoredit')."'>{$minor}</label>\n";
 904                 }
 905
 906                 $watchhtml = '';
 907
 908                 if ( $wgUser->isLoggedIn() ) {
 909                         $watchhtml = "<input tabindex='4' type='checkbox' name='wpWatchthis'".
 910                                 ($this->watchthis?" checked='checked'":"").
 911                                 " accesskey=\"".htmlspecialchars(wfMsg('accesskey-watch'))."\" id='wpWatchthis'  />\n".
 912                                 "<label for='wpWatchthis' title=\"" .
 913                                         htmlspecialchars(wfMsg('tooltip-watch'))."\">{$watchthis}</label>\n";
 914                 }
 915
 916                 $checkboxhtml = $minoredithtml . $watchhtml;
 917
 918                 if ( $wgUser->getOption( 'previewontop' ) ) {
 919
 920                         if ( 'preview' == $this->formtype ) {
 921                                 $this->showPreview();
 922                         } else {
 923                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
 924                         }
 925
 926                         if ( 'diff' == $this->formtype ) {
 927                                 $wgOut->addHTML( $this->getDiff() );
 928                         }
 929                 }
 930
 931
 932                 # if this is a comment, show a subject line at the top, which is also the edit summary.
 933                 # Otherwise, show a summary field at the bottom
 934                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
 935                 if( $this->section == 'new' ) {
 936                         $commentsubject="<span id='wpSummaryLabel'><label for='wpSummary'>{$subject}:</label></span>\n<div class='editOptions'>\n<input tabindex='1' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
 937                         $editsummary = '';
 938                 } else {
 939                         $commentsubject = '';
 940                         $editsummary="<span id='wpSummaryLabel'><label for='wpSummary'>{$summary}:</label></span>\n<div class='editOptions'>\n<input tabindex='2' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
 941                 }
 942
 943                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
 944                 if( !$this->preview && !$this->diff ) {
 945                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
 946                 }
 947                 $templates = $this->formatTemplates();
 948
 949                 global $wgUseMetadataEdit ;
 950                 if ( $wgUseMetadataEdit ) {
 951                         $metadata = $this->mMetaData ;
 952                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
 953                         $top = wfMsgWikiHtml( 'metadata_help' );
 954                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
 955                 }
 956                 else $metadata = "" ;
 957
 958                 $hidden = '';
 959                 $recreate = '';
 960                 if ($this->deletedSinceEdit) {
 961                         if ( 'save' != $this->formtype ) {
 962                                 $wgOut->addWikiText( wfMsg('deletedwhileediting'));
 963                         } else {
 964                                 // Hide the toolbar and edit area, use can click preview to get it back
 965                                 // Add an confirmation checkbox and explanation.
 966                                 $toolbar = '';
 967                                 $hidden = 'type="hidden" style="display:none;"';
 968                                 $recreate = $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ));
 969                                 $recreate .=
 970                                         "<br /><input tabindex='1' type='checkbox' value='1' name='wpRecreate' id='wpRecreate' />".
 971                                         "<label for='wpRecreate' title='".wfMsg('tooltip-recreate')."'>". wfMsg('recreate')."</label>";
 972                         }
 973                 }
 974
 975                 $temp = array(
 976                         'id'        => 'wpSave',
 977                         'name'      => 'wpSave',
 978                         'type'      => 'submit',
 979                         'tabindex'  => '5',
 980                         'value'     => wfMsg('savearticle'),
 981                         'accesskey' => wfMsg('accesskey-save'),
 982                         'title'     => wfMsg('tooltip-save'),
 983                 );
 984                 $buttons['save'] = wfElement('input', $temp, '');
 985                 $temp = array(
 986                         'id'        => 'wpDiff',
 987                         'name'      => 'wpDiff',
 988                         'type'      => 'submit',
 989                         'tabindex'  => '7',
 990                         'value'     => wfMsg('showdiff'),
 991                         'accesskey' => wfMsg('accesskey-diff'),
 992                         'title'     => wfMsg('tooltip-diff'),
 993                 );
 994                 $buttons['diff'] = wfElement('input', $temp, '');
 995
 996                 global $wgLivePreview;
 997                 if ( $wgLivePreview && $wgUser->getOption( 'uselivepreview' ) ) {
 998                         $temp = array(
 999                                 'id'        => 'wpPreview',
1000                                 'name'      => 'wpPreview',
1001                                 'type'      => 'submit',
1002                                 'tabindex'  => '6',
1003                                 'value'     => wfMsg('showpreview'),
1004                                 'accesskey' => '',
1005                                 'title'     => wfMsg('tooltip-preview'),
1006                                 'style'     => 'display: none;',
1007                         );
1008                         $buttons['preview'] = wfElement('input', $temp, '');
1009                         $temp = array(
1010                                 'id'        => 'wpLivePreview',
1011                                 'name'      => 'wpLivePreview',
1012                                 'type'      => 'submit',
1013                                 'tabindex'  => '6',
1014                                 'value'     => wfMsg('showlivepreview'),
1015                                 'accesskey' => wfMsg('accesskey-preview'),
1016                                 'title'     => '',
1017                                 'onclick'   => $this->doLivePreviewScript(),
1018                         );
1019                         $buttons['live'] = wfElement('input', $temp, '');
1020                 } else {
1021                         $temp = array(
1022                                 'id'        => 'wpPreview',
1023                                 'name'      => 'wpPreview',
1024                                 'type'      => 'submit',
1025                                 'tabindex'  => '6',
1026                                 'value'     => wfMsg('showpreview'),
1027                                 'accesskey' => wfMsg('accesskey-preview'),
1028                                 'title'     => wfMsg('tooltip-preview'),
1029                         );
1030                         $buttons['preview'] = wfElement('input', $temp, '');
1031                         $buttons['live'] = '';
1032                 }
1033
1034                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
1035                         ? ""
1036                         : "<input type='hidden' name=\"safemode\" value='1' />\n";
1037
1038                 $wgOut->addHTML( <<<END
1039 {$toolbar}
1040 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1041 END
1042 );
1043
1044                 if( is_callable( $formCallback ) ) {
1045                         call_user_func_array( $formCallback, array( &$wgOut ) );
1046                 }
1047
1048                 // Put these up at the top to ensure they aren't lost on early form submission
1049                 $wgOut->addHTML( "
1050 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
1051 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
1052 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
1053 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
1054
1055                 $wgOut->addHTML( <<<END
1056 $recreate
1057 {$commentsubject}
1058 <textarea tabindex='1' accesskey="," name="wpTextbox1" id="wpTextbox1" rows='{$rows}'
1059 cols='{$cols}'{$ew} $hidden>
1060 END
1061 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox1 ) ) .
1062 "
1063 </textarea>
1064                 " );
1065
1066                 $wgOut->addWikiText( $copywarn );
1067                 $wgOut->addHTML( "
1068 {$metadata}
1069 {$editsummary}
1070 {$checkboxhtml}
1071 {$safemodehtml}
1072 ");
1073
1074                 $wgOut->addHTML(
1075 "<div class='editButtons'>
1076         {$buttons['save']}
1077         {$buttons['preview']}
1078         {$buttons['live']}
1079         {$buttons['diff']}
1080         <span class='editHelp'>{$cancel} | {$edithelp}</span>
1081 </div><!-- editButtons -->
1082 </div><!-- editOptions -->");
1083
1084                 $wgOut->addWikiText( wfMsgForContent( 'edittools' ) );
1085
1086                 $wgOut->addHTML( "
1087 <div class='templatesUsed'>
1088 {$templates}
1089 </div>
1090 " );
1091
1092                 if ( $wgUser->isLoggedIn() ) {
1093                         /**
1094                          * To make it harder for someone to slip a user a page
1095                          * which submits an edit form to the wiki without their
1096                          * knowledge, a random token is associated with the login
1097                          * session. If it's not passed back with the submission,
1098                          * we won't save the page, or render user JavaScript and
1099                          * CSS previews.
1100                          */
1101                         $token = htmlspecialchars( $wgUser->editToken() );
1102                         $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
1103                 }
1104
1105                 # If a blank edit summary was previously provided, and the appropriate
1106                 # user preference is active, pass a hidden tag here. This will stop the
1107                 # user being bounced back more than once in the event that a summary
1108                 # is not required.
1109                 if( $this->missingSummary ) {
1110                         $wgOut->addHTML( "<input type=\"hidden\" name=\"wpIgnoreBlankSummary\" value=\"1\" />\n" );
1111                 }
1112
1113                 # For a bit more sophisticated detection of blank summaries, hash the
1114                 # automatic one and pass that in a hidden field.
1115                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1116                 $wgOut->addHtml( wfHidden( 'wpAutoSummary', $autosumm ) );
1117
1118                 if ( $this->isConflict ) {
1119                         require_once( "DifferenceEngine.php" );
1120                         $wgOut->addWikiText( '==' . wfMsg( "yourdiff" ) . '==' );
1121
1122                         $de = new DifferenceEngine( $this->mTitle );
1123                         $de->setText( $this->textbox2, $this->textbox1 );
1124                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1125
1126                         $wgOut->addWikiText( '==' . wfMsg( "yourtext" ) . '==' );
1127                         $wgOut->addHTML( "<textarea tabindex=6 id='wpTextbox2' name=\"wpTextbox2\" rows='{$rows}' cols='{$cols}' wrap='virtual'>"
1128                                 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox2 ) ) . "\n</textarea>" );
1129                 }
1130                 $wgOut->addHTML( "</form>\n" );
1131                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1132
1133                         if ( $this->formtype == 'preview') {
1134                                 $this->showPreview();
1135                         } else {
1136                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
1137                         }
1138
1139                         if ( $this->formtype == 'diff') {
1140                                 $wgOut->addHTML( $this->getDiff() );
1141                         }
1142
1143                 }
1144
1145                 wfProfileOut( $fname );
1146         }
1147
1148         /**
1149          * Append preview output to $wgOut.
1150          * Includes category rendering if this is a category page.
1151          * @private
1152          */
1153         function showPreview() {
1154                 global $wgOut;
1155                 $wgOut->addHTML( '<div id="wikiPreview">' );
1156                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1157                         $this->mArticle->openShowCategory();
1158                 }
1159                 $previewOutput = $this->getPreviewText();
1160                 $wgOut->addHTML( $previewOutput );
1161                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1162                         $this->mArticle->closeShowCategory();
1163                 }
1164                 $wgOut->addHTML( "<br style=\"clear:both;\" />\n" );
1165                 $wgOut->addHTML( '</div>' );
1166         }
1167
1168         /**
1169          * Prepare a list of templates used by this page. Returns HTML.
1170          */
1171         function formatTemplates() {
1172                 global $wgUser;
1173
1174                 $fname = 'EditPage::formatTemplates';
1175                 wfProfileIn( $fname );
1176
1177                 $sk =& $wgUser->getSkin();
1178
1179                 $outText = '';
1180                 $templates = $this->mArticle->getUsedTemplates();
1181                 if ( count( $templates ) > 0 ) {
1182                         # Do a batch existence check
1183                         $batch = new LinkBatch;
1184                         foreach( $templates as $title ) {
1185                                 $batch->addObj( $title );
1186                         }
1187                         $batch->execute();
1188
1189                         # Construct the HTML
1190                         $outText = '<br />'. wfMsgExt( 'templatesused', array( 'parseinline' ) ) . '<ul>';
1191                         foreach ( $templates as $titleObj ) {
1192                                 $outText .= '<li>' . $sk->makeLinkObj( $titleObj ) . '</li>';
1193                         }
1194                         $outText .= '</ul>';
1195                 }
1196                 wfProfileOut( $fname );
1197                 return $outText;
1198         }
1199
1200         /**
1201          * Live Preview lets us fetch rendered preview page content and
1202          * add it to the page without refreshing the whole page.
1203          * If not supported by the browser it will fall through to the normal form
1204          * submission method.
1205          *
1206          * This function outputs a script tag to support live preview, and
1207          * returns an onclick handler which should be added to the attributes
1208          * of the preview button
1209          */
1210         function doLivePreviewScript() {
1211                 global $wgStylePath, $wgJsMimeType, $wgOut, $wgTitle;
1212                 $wgOut->addHTML( '<script type="'.$wgJsMimeType.'" src="' .
1213                         htmlspecialchars( $wgStylePath . '/common/preview.js' ) .
1214                         '"></script>' . "\n" );
1215                 $liveAction = $wgTitle->getLocalUrl( 'action=submit&wpPreview=true&live=true' );
1216                 return "return !livePreview(" .
1217                         "getElementById('wikiPreview')," .
1218                         "editform.wpTextbox1.value," .
1219                         '"' . $liveAction . '"' . ")";
1220         }
1221
1222         function getLastDelete() {
1223                 $dbr =& wfGetDB( DB_SLAVE );
1224                 $fname = 'EditPage::getLastDelete';
1225                 $res = $dbr->select(
1226                         array( 'logging', 'user' ),
1227                         array( 'log_type',
1228                                'log_action',
1229                                'log_timestamp',
1230                                'log_user',
1231                                'log_namespace',
1232                                'log_title',
1233                                'log_comment',
1234                                'log_params',
1235                                'user_name', ),
1236                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1237                                'log_title' => $this->mTitle->getDBkey(),
1238                                'log_type' => 'delete',
1239                                'log_action' => 'delete',
1240                                'user_id=log_user' ),
1241                         $fname,
1242                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
1243
1244                 if($dbr->numRows($res) == 1) {
1245                         while ( $x = $dbr->fetchObject ( $res ) )
1246                                 $data = $x;
1247                         $dbr->freeResult ( $res ) ;
1248                 } else {
1249                         $data = null;
1250                 }
1251                 return $data;
1252         }
1253
1254         /**
1255          * @todo document
1256          */
1257         function getPreviewText() {
1258                 global $wgOut, $wgUser, $wgTitle, $wgParser;
1259
1260                 $fname = 'EditPage::getPreviewText';
1261                 wfProfileIn( $fname );
1262
1263                 if ( $this->mTokenOk ) {
1264                         $msg = 'previewnote';
1265                 } else {
1266                         $msg = 'session_fail_preview';
1267                 }
1268                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
1269                         "<div class='previewnote'>" . $wgOut->parse( wfMsg( $msg ) ) . "</div>\n";
1270                 if ( $this->isConflict ) {
1271                         $previewhead.='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1272                 }
1273
1274                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1275                 $parserOptions->setEditSection( false );
1276
1277                 global $wgRawHtml;
1278                 if( $wgRawHtml && !$this->mTokenOk ) {
1279                         // Could be an offsite preview attempt. This is very unsafe if
1280                         // HTML is enabled, as it could be an attack.
1281                         return $wgOut->parse( "<div class='previewnote'>" .
1282                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1283                 }
1284
1285                 # don't parse user css/js, show message about preview
1286                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1287
1288                 if ( $this->isCssJsSubpage ) {
1289                         if(preg_match("/\\.css$/", $wgTitle->getText() ) ) {
1290                                 $previewtext = wfMsg('usercsspreview');
1291                         } else if(preg_match("/\\.js$/", $wgTitle->getText() ) ) {
1292                                 $previewtext = wfMsg('userjspreview');
1293                         }
1294                         $parserOptions->setTidy(true);
1295                         $parserOutput = $wgParser->parse( $previewtext , $wgTitle, $parserOptions );
1296                         $wgOut->addHTML( $parserOutput->mText );
1297                         wfProfileOut( $fname );
1298                         return $previewhead;
1299                 } else {
1300                         # if user want to see preview when he edit an article
1301                         if( $wgUser->getOption('previewonfirst') and ($this->textbox1 == '')) {
1302                                 $this->textbox1 = $this->mArticle->getContent();
1303                         }
1304
1305                         $toparse = $this->textbox1;
1306
1307                         # If we're adding a comment, we need to show the
1308                         # summary as the headline
1309                         if($this->section=="new" && $this->summary!="") {
1310                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1311                         }
1312
1313                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData ;
1314                         $parserOptions->setTidy(true);
1315                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ) ."\n\n",
1316                                         $wgTitle, $parserOptions );
1317
1318                         $previewHTML = $parserOutput->getText();
1319                         $wgOut->addParserOutputNoText( $parserOutput );
1320
1321                         wfProfileOut( $fname );
1322                         return $previewhead . $previewHTML;
1323                 }
1324         }
1325
1326         /**
1327          * Call the stock "user is blocked" page
1328          */
1329         function blockedIPpage() {
1330                 global $wgOut;
1331                 $wgOut->blockedPage();
1332         }
1333
1334         /**
1335          * Produce the stock "please login to edit pages" page
1336          */
1337         function userNotLoggedInPage() {
1338                 global $wgUser, $wgOut;
1339                 $skin = $wgUser->getSkin();
1340
1341                 $loginTitle = Title::makeTitle( NS_SPECIAL, 'Userlogin' );
1342                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $this->mTitle->getPrefixedUrl() );
1343
1344                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1345                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1346                 $wgOut->setArticleRelated( false );
1347
1348                 $wgOut->addHtml( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
1349                 $wgOut->returnToMain( false, $this->mTitle->getPrefixedUrl() );
1350         }
1351
1352         /**
1353          * Creates a basic error page which informs the user that
1354          * they have to validate their email address before being
1355          * allowed to edit.
1356          */
1357         function userNotConfirmedPage() {
1358                 global $wgOut;
1359
1360                 $wgOut->setPageTitle( wfMsg( 'confirmedittitle' ) );
1361                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1362                 $wgOut->setArticleRelated( false );
1363
1364                 $wgOut->addWikiText( wfMsg( 'confirmedittext' ) );
1365                 $wgOut->returnToMain( false );
1366         }
1367
1368         /**
1369          * Produce the stock "your edit contains spam" page
1370          *
1371          * @param $match Text which triggered one or more filters
1372          */
1373         function spamPage( $match = false ) {
1374                 global $wgOut;
1375
1376                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1377                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1378                 $wgOut->setArticleRelated( false );
1379
1380                 $wgOut->addWikiText( wfMsg( 'spamprotectiontext' ) );
1381                 if ( $match )
1382                         $wgOut->addWikiText( wfMsg( 'spamprotectionmatch', "<nowiki>{$match}</nowiki>" ) );
1383
1384                 $wgOut->returnToMain( false );
1385         }
1386
1387         /**
1388          * @private
1389          * @todo document
1390          */
1391         function mergeChangesInto( &$editText ){
1392                 $fname = 'EditPage::mergeChangesInto';
1393                 wfProfileIn( $fname );
1394
1395                 $db =& wfGetDB( DB_MASTER );
1396
1397                 // This is the revision the editor started from
1398                 $baseRevision = Revision::loadFromTimestamp(
1399                         $db, $this->mArticle->mTitle, $this->edittime );
1400                 if( is_null( $baseRevision ) ) {
1401                         wfProfileOut( $fname );
1402                         return false;
1403                 }
1404                 $baseText = $baseRevision->getText();
1405
1406                 // The current state, we want to merge updates into it
1407                 $currentRevision =  Revision::loadFromTitle(
1408                         $db, $this->mArticle->mTitle );
1409                 if( is_null( $currentRevision ) ) {
1410                         wfProfileOut( $fname );
1411                         return false;
1412                 }
1413                 $currentText = $currentRevision->getText();
1414
1415                 if( wfMerge( $baseText, $editText, $currentText, $result ) ){
1416                         $editText = $result;
1417                         wfProfileOut( $fname );
1418                         return true;
1419                 } else {
1420                         wfProfileOut( $fname );
1421                         return false;
1422                 }
1423         }
1424
1425         /**
1426          * Check if the browser is on a blacklist of user-agents known to
1427          * mangle UTF-8 data on form submission. Returns true if Unicode
1428          * should make it through, false if it's known to be a problem.
1429          * @return bool
1430          * @private
1431          */
1432         function checkUnicodeCompliantBrowser() {
1433                 global $wgBrowserBlackList;
1434                 if( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
1435                         // No User-Agent header sent? Trust it by default...
1436                         return true;
1437                 }
1438                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1439                 foreach ( $wgBrowserBlackList as $browser ) {
1440                         if ( preg_match($browser, $currentbrowser) ) {
1441                                 return false;
1442                         }
1443                 }
1444                 return true;
1445         }
1446
1447         /**
1448          * Format an anchor fragment as it would appear for a given section name
1449          * @param string $text
1450          * @return string
1451          * @private
1452          */
1453         function sectionAnchor( $text ) {
1454                 $headline = Sanitizer::decodeCharReferences( $text );
1455                 # strip out HTML
1456                 $headline = preg_replace( '/<.*?' . '>/', '', $headline );
1457                 $headline = trim( $headline );
1458                 $sectionanchor = '#' . urlencode( str_replace( ' ', '_', $headline ) );
1459                 $replacearray = array(
1460                         '%3A' => ':',
1461                         '%' => '.'
1462                 );
1463                 return str_replace(
1464                         array_keys( $replacearray ),
1465                         array_values( $replacearray ),
1466                         $sectionanchor );
1467         }
1468
1469         /**
1470          * Shows a bulletin board style toolbar for common editing functions.
1471          * It can be disabled in the user preferences.
1472          * The necessary JavaScript code can be found in style/wikibits.js.
1473          */
1474         function getEditToolbar() {
1475                 global $wgStylePath, $wgContLang, $wgJsMimeType;
1476
1477                 /**
1478                  * toolarray an array of arrays which each include the filename of
1479                  * the button image (without path), the opening tag, the closing tag,
1480                  * and optionally a sample text that is inserted between the two when no
1481                  * selection is highlighted.
1482                  * The tip text is shown when the user moves the mouse over the button.
1483                  *
1484                  * Already here are accesskeys (key), which are not used yet until someone
1485                  * can figure out a way to make them work in IE. However, we should make
1486                  * sure these keys are not defined on the edit page.
1487                  */
1488                 $toolarray=array(
1489                         array(  'image'=>'button_bold.png',
1490                                         'open'  =>      "\'\'\'",
1491                                         'close' =>      "\'\'\'",
1492                                         'sample'=>      wfMsg('bold_sample'),
1493                                         'tip'   =>      wfMsg('bold_tip'),
1494                                         'key'   =>      'B'
1495                                 ),
1496                         array(  'image'=>'button_italic.png',
1497                                         'open'  =>      "\'\'",
1498                                         'close' =>      "\'\'",
1499                                         'sample'=>      wfMsg('italic_sample'),
1500                                         'tip'   =>      wfMsg('italic_tip'),
1501                                         'key'   =>      'I'
1502                                 ),
1503                         array(  'image'=>'button_link.png',
1504                                         'open'  =>      '[[',
1505                                         'close' =>      ']]',
1506                                         'sample'=>      wfMsg('link_sample'),
1507                                         'tip'   =>      wfMsg('link_tip'),
1508                                         'key'   =>      'L'
1509                                 ),
1510                         array(  'image'=>'button_extlink.png',
1511                                         'open'  =>      '[',
1512                                         'close' =>      ']',
1513                                         'sample'=>      wfMsg('extlink_sample'),
1514                                         'tip'   =>      wfMsg('extlink_tip'),
1515                                         'key'   =>      'X'
1516                                 ),
1517                         array(  'image'=>'button_headline.png',
1518                                         'open'  =>      "\\n== ",
1519                                         'close' =>      " ==\\n",
1520                                         'sample'=>      wfMsg('headline_sample'),
1521                                         'tip'   =>      wfMsg('headline_tip'),
1522                                         'key'   =>      'H'
1523                                 ),
1524                         array(  'image'=>'button_image.png',
1525                                         'open'  =>      '[['.$wgContLang->getNsText(NS_IMAGE).":",
1526                                         'close' =>      ']]',
1527                                         'sample'=>      wfMsg('image_sample'),
1528                                         'tip'   =>      wfMsg('image_tip'),
1529                                         'key'   =>      'D'
1530                                 ),
1531                         array(  'image' =>'button_media.png',
1532                                         'open'  =>      '[['.$wgContLang->getNsText(NS_MEDIA).':',
1533                                         'close' =>      ']]',
1534                                         'sample'=>      wfMsg('media_sample'),
1535                                         'tip'   =>      wfMsg('media_tip'),
1536                                         'key'   =>      'M'
1537                                 ),
1538                         array(  'image' =>'button_math.png',
1539                                         'open'  =>      "<math>",
1540                                         'close' =>      "<\\/math>",
1541                                         'sample'=>      wfMsg('math_sample'),
1542                                         'tip'   =>      wfMsg('math_tip'),
1543                                         'key'   =>      'C'
1544                                 ),
1545                         array(  'image' =>'button_nowiki.png',
1546                                         'open'  =>      "<nowiki>",
1547                                         'close' =>      "<\\/nowiki>",
1548                                         'sample'=>      wfMsg('nowiki_sample'),
1549                                         'tip'   =>      wfMsg('nowiki_tip'),
1550                                         'key'   =>      'N'
1551                                 ),
1552                         array(  'image' =>'button_sig.png',
1553                                         'open'  =>      '--~~~~',
1554                                         'close' =>      '',
1555                                         'sample'=>      '',
1556                                         'tip'   =>      wfMsg('sig_tip'),
1557                                         'key'   =>      'Y'
1558                                 ),
1559                         array(  'image' =>'button_hr.png',
1560                                         'open'  =>      "\\n----\\n",
1561                                         'close' =>      '',
1562                                         'sample'=>      '',
1563                                         'tip'   =>      wfMsg('hr_tip'),
1564                                         'key'   =>      'R'
1565                                 )
1566                 );
1567                 $toolbar = "<div id='toolbar'>\n";
1568                 $toolbar.="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
1569
1570                 foreach($toolarray as $tool) {
1571
1572                         $image=$wgStylePath.'/common/images/'.$tool['image'];
1573                         $open=$tool['open'];
1574                         $close=$tool['close'];
1575                         $sample = wfEscapeJsString( $tool['sample'] );
1576
1577                         // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
1578                         // Older browsers show a "speedtip" type message only for ALT.
1579                         // Ideally these should be different, realistically they
1580                         // probably don't need to be.
1581                         $tip = wfEscapeJsString( $tool['tip'] );
1582
1583                         #$key = $tool["key"];
1584
1585                         $toolbar.="addButton('$image','$tip','$open','$close','$sample');\n";
1586                 }
1587
1588                 $toolbar.="/*]]>*/\n</script>";
1589                 $toolbar.="\n</div>";
1590                 return $toolbar;
1591         }
1592
1593         /**
1594          * Output preview text only. This can be sucked into the edit page
1595          * via JavaScript, and saves the server time rendering the skin as
1596          * well as theoretically being more robust on the client (doesn't
1597          * disturb the edit box's undo history, won't eat your text on
1598          * failure, etc).
1599          *
1600          * @todo This doesn't include category or interlanguage links.
1601          *       Would need to enhance it a bit, maybe wrap them in XML
1602          *       or something... that might also require more skin
1603          *       initialization, so check whether that's a problem.
1604          */
1605         function livePreview() {
1606                 global $wgOut;
1607                 $wgOut->disable();
1608                 header( 'Content-type: text/xml' );
1609                 header( 'Cache-control: no-cache' );
1610                 # FIXME
1611                 echo $this->getPreviewText( );
1612                 /* To not shake screen up and down between preview and live-preview */
1613                 echo "<br style=\"clear:both;\" />\n";
1614         }
1615
1616
1617         /**
1618          * Get a diff between the current contents of the edit box and the
1619          * version of the page we're editing from.
1620          *
1621          * If this is a section edit, we'll replace the section as for final
1622          * save and then make a comparison.
1623          *
1624          * @return string HTML
1625          */
1626         function getDiff() {
1627                 require_once( 'DifferenceEngine.php' );
1628                 $oldtext = $this->mArticle->fetchContent();
1629                 $newtext = $this->mArticle->replaceSection(
1630                         $this->section, $this->textbox1, $this->summary, $this->edittime );
1631                 $newtext = $this->mArticle->preSaveTransform( $newtext );
1632                 $oldtitle = wfMsgExt( 'currentrev', array('parseinline') );
1633                 $newtitle = wfMsgExt( 'yourtext', array('parseinline') );
1634                 if ( $oldtext !== false  || $newtext != '' ) {
1635                         $de = new DifferenceEngine( $this->mTitle );
1636                         $de->setText( $oldtext, $newtext );
1637                         $difftext = $de->getDiff( $oldtitle, $newtitle );
1638                 } else {
1639                         $difftext = '';
1640                 }
1641
1642                 return '<div id="wikiDiff">' . $difftext . '</div>';
1643         }
1644
1645         /**
1646          * Filter an input field through a Unicode de-armoring process if it
1647          * came from an old browser with known broken Unicode editing issues.
1648          *
1649          * @param WebRequest $request
1650          * @param string $field
1651          * @return string
1652          * @private
1653          */
1654         function safeUnicodeInput( $request, $field ) {
1655                 $text = rtrim( $request->getText( $field ) );
1656                 return $request->getBool( 'safemode' )
1657                         ? $this->unmakesafe( $text )
1658                         : $text;
1659         }
1660
1661         /**
1662          * Filter an output field through a Unicode armoring process if it is
1663          * going to an old browser with known broken Unicode editing issues.
1664          *
1665          * @param string $text
1666          * @return string
1667          * @private
1668          */
1669         function safeUnicodeOutput( $text ) {
1670                 global $wgContLang;
1671                 $codedText = $wgContLang->recodeForEdit( $text );
1672                 return $this->checkUnicodeCompliantBrowser()
1673                         ? $codedText
1674                         : $this->makesafe( $codedText );
1675         }
1676
1677         /**
1678          * A number of web browsers are known to corrupt non-ASCII characters
1679          * in a UTF-8 text editing environment. To protect against this,
1680          * detected browsers will be served an armored version of the text,
1681          * with non-ASCII chars converted to numeric HTML character references.
1682          *
1683          * Preexisting such character references will have a 0 added to them
1684          * to ensure that round-trips do not alter the original data.
1685          *
1686          * @param string $invalue
1687          * @return string
1688          * @private
1689          */
1690         function makesafe( $invalue ) {
1691                 // Armor existing references for reversability.
1692                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
1693
1694                 $bytesleft = 0;
1695                 $result = "";
1696                 $working = 0;
1697                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1698                         $bytevalue = ord( $invalue{$i} );
1699                         if( $bytevalue <= 0x7F ) { //0xxx xxxx
1700                                 $result .= chr( $bytevalue );
1701                                 $bytesleft = 0;
1702                         } elseif( $bytevalue <= 0xBF ) { //10xx xxxx
1703                                 $working = $working << 6;
1704                                 $working += ($bytevalue & 0x3F);
1705                                 $bytesleft--;
1706                                 if( $bytesleft <= 0 ) {
1707                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
1708                                 }
1709                         } elseif( $bytevalue <= 0xDF ) { //110x xxxx
1710                                 $working = $bytevalue & 0x1F;
1711                                 $bytesleft = 1;
1712                         } elseif( $bytevalue <= 0xEF ) { //1110 xxxx
1713                                 $working = $bytevalue & 0x0F;
1714                                 $bytesleft = 2;
1715                         } else { //1111 0xxx
1716                                 $working = $bytevalue & 0x07;
1717                                 $bytesleft = 3;
1718                         }
1719                 }
1720                 return $result;
1721         }
1722
1723         /**
1724          * Reverse the previously applied transliteration of non-ASCII characters
1725          * back to UTF-8. Used to protect data from corruption by broken web browsers
1726          * as listed in $wgBrowserBlackList.
1727          *
1728          * @param string $invalue
1729          * @return string
1730          * @private
1731          */
1732         function unmakesafe( $invalue ) {
1733                 $result = "";
1734                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1735                         if( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
1736                                 $i += 3;
1737                                 $hexstring = "";
1738                                 do {
1739                                         $hexstring .= $invalue{$i};
1740                                         $i++;
1741                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
1742
1743                                 // Do some sanity checks. These aren't needed for reversability,
1744                                 // but should help keep the breakage down if the editor
1745                                 // breaks one of the entities whilst editing.
1746                                 if ((substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6)) {
1747                                         $codepoint = hexdec($hexstring);
1748                                         $result .= codepointToUtf8( $codepoint );
1749                                 } else {
1750                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
1751                                 }
1752                         } else {
1753                                 $result .= substr( $invalue, $i, 1 );
1754                         }
1755                 }
1756                 // reverse the transform that we made for reversability reasons.
1757                 return strtr( $result, array( "&#x0" => "&#x" ) );
1758         }
1759
1760         function noCreatePermission() {
1761                 global $wgOut;
1762                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
1763                 $wgOut->addWikiText( wfMsg( 'nocreatetext' ) );
1764         }
1765
1766 }
1767
1768 ?>