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 $mTriedSave = false;
  28         var $tooBig = false;
  29         var $kblength = false;
  30         var $missingComment = false;
  31         var $missingSummary = false;
  32         var $allowBlankSummary = false;
  33         var $autoSumm = '';
  34         var $hookError = '';
  35
  36         # Form values
  37         var $save = false, $preview = false, $diff = false;
  38         var $minoredit = false, $watchthis = false, $recreate = false;
  39         var $textbox1 = '', $textbox2 = '', $summary = '';
  40         var $edittime = '', $section = '', $starttime = '';
  41         var $oldid = 0, $editintro = '', $scrolltop = null;
  42
  43         /**
  44          * @todo document
  45          * @param $article
  46          */
  47         function EditPage( $article ) {
  48                 $this->mArticle =& $article;
  49                 global $wgTitle;
  50                 $this->mTitle =& $wgTitle;
  51         }
  52
  53         /**
  54          * This is the function that extracts metadata from the article body on the first view.
  55          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
  56          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
  57          */
  58         function extractMetaDataFromArticle () {
  59                 global $wgUseMetadataEdit , $wgMetadataWhitelist , $wgLang ;
  60                 $this->mMetaData = '' ;
  61                 if ( !$wgUseMetadataEdit ) return ;
  62                 if ( $wgMetadataWhitelist == '' ) return ;
  63                 $s = '' ;
  64                 $t = $this->mArticle->getContent();
  65
  66                 # MISSING : <nowiki> filtering
  67
  68                 # Categories and language links
  69                 $t = explode ( "\n" , $t ) ;
  70                 $catlow = strtolower ( $wgLang->getNsText ( NS_CATEGORY ) ) ;
  71                 $cat = $ll = array() ;
  72                 foreach ( $t AS $key => $x )
  73                 {
  74                         $y = trim ( strtolower ( $x ) ) ;
  75                         while ( substr ( $y , 0 , 2 ) == '[[' )
  76                         {
  77                                 $y = explode ( ']]' , trim ( $x ) ) ;
  78                                 $first = array_shift ( $y ) ;
  79                                 $first = explode ( ':' , $first ) ;
  80                                 $ns = array_shift ( $first ) ;
  81                                 $ns = trim ( str_replace ( '[' , '' , $ns ) ) ;
  82                                 if ( strlen ( $ns ) == 2 OR strtolower ( $ns ) == $catlow )
  83                                 {
  84                                         $add = '[[' . $ns . ':' . implode ( ':' , $first ) . ']]' ;
  85                                         if ( strtolower ( $ns ) == $catlow ) $cat[] = $add ;
  86                                         else $ll[] = $add ;
  87                                         $x = implode ( ']]' , $y ) ;
  88                                         $t[$key] = $x ;
  89                                         $y = trim ( strtolower ( $x ) ) ;
  90                                 }
  91                         }
  92                 }
  93                 if ( count ( $cat ) ) $s .= implode ( ' ' , $cat ) . "\n" ;
  94                 if ( count ( $ll ) ) $s .= implode ( ' ' , $ll ) . "\n" ;
  95                 $t = implode ( "\n" , $t ) ;
  96
  97                 # Load whitelist
  98                 $sat = array () ; # stand-alone-templates; must be lowercase
  99                 $wl_title = Title::newFromText ( $wgMetadataWhitelist ) ;
 100                 $wl_article = new Article ( $wl_title ) ;
 101                 $wl = explode ( "\n" , $wl_article->getContent() ) ;
 102                 foreach ( $wl AS $x )
 103                 {
 104                         $isentry = false ;
 105                         $x = trim ( $x ) ;
 106                         while ( substr ( $x , 0 , 1 ) == '*' )
 107                         {
 108                                 $isentry = true ;
 109                                 $x = trim ( substr ( $x , 1 ) ) ;
 110                         }
 111                         if ( $isentry )
 112                         {
 113                                 $sat[] = strtolower ( $x ) ;
 114                         }
 115
 116                 }
 117
 118                 # Templates, but only some
 119                 $t = explode ( '{{' , $t ) ;
 120                 $tl = array () ;
 121                 foreach ( $t AS $key => $x )
 122                 {
 123                         $y = explode ( '}}' , $x , 2 ) ;
 124                         if ( count ( $y ) == 2 )
 125                         {
 126                                 $z = $y[0] ;
 127                                 $z = explode ( '|' , $z ) ;
 128                                 $tn = array_shift ( $z ) ;
 129                                 if ( in_array ( strtolower ( $tn ) , $sat ) )
 130                                 {
 131                                         $tl[] = '{{' . $y[0] . '}}' ;
 132                                         $t[$key] = $y[1] ;
 133                                         $y = explode ( '}}' , $y[1] , 2 ) ;
 134                                 }
 135                                 else $t[$key] = '{{' . $x ;
 136                         }
 137                         else if ( $key != 0 ) $t[$key] = '{{' . $x ;
 138                         else $t[$key] = $x ;
 139                 }
 140                 if ( count ( $tl ) ) $s .= implode ( ' ' , $tl ) ;
 141                 $t = implode ( '' , $t ) ;
 142
 143                 $t = str_replace ( "\n\n\n" , "\n" , $t ) ;
 144                 $this->mArticle->mContent = $t ;
 145                 $this->mMetaData = $s ;
 146         }
 147
 148         function submit() {
 149                 $this->edit();
 150         }
 151
 152         /**
 153          * This is the function that gets called for "action=edit". It
 154          * sets up various member variables, then passes execution to
 155          * another function, usually showEditForm()
 156          *
 157          * The edit form is self-submitting, so that when things like
 158          * preview and edit conflicts occur, we get the same form back
 159          * with the extra stuff added.  Only when the final submission
 160          * is made and all is well do we actually save and redirect to
 161          * the newly-edited page.
 162          */
 163         function edit() {
 164                 global $wgOut, $wgUser, $wgRequest, $wgTitle;
 165                 global $wgEmailConfirmToEdit;
 166
 167                 if ( ! wfRunHooks( 'AlternateEdit', array( &$this  ) ) )
 168                         return;
 169
 170                 $fname = 'EditPage::edit';
 171                 wfProfileIn( $fname );
 172                 wfDebug( "$fname: enter\n" );
 173
 174                 // this is not an article
 175                 $wgOut->setArticleFlag(false);
 176
 177                 $this->importFormData( $wgRequest );
 178                 $this->firsttime = false;
 179
 180                 if( $this->live ) {
 181                         $this->livePreview();
 182                         wfProfileOut( $fname );
 183                         return;
 184                 }
 185
 186                 if ( ! $this->mTitle->userCanEdit() ) {
 187                         wfDebug( "$fname: user can't edit\n" );
 188                         $wgOut->readOnlyPage( $this->mArticle->getContent(), true );
 189                         wfProfileOut( $fname );
 190                         return;
 191                 }
 192                 wfDebug( "$fname: Checking blocks\n" );
 193                 if ( !$this->preview && !$this->diff && $wgUser->isBlockedFrom( $this->mTitle, !$this->save ) ) {
 194                         # When previewing, don't check blocked state - will get caught at save time.
 195                         # Also, check when starting edition is done against slave to improve performance.
 196                         wfDebug( "$fname: user is blocked\n" );
 197                         $wgOut->blockedPage();
 198                         wfProfileOut( $fname );
 199                         return;
 200                 }
 201                 if ( !$wgUser->isAllowed('edit') ) {
 202                         if ( $wgUser->isAnon() ) {
 203                                 wfDebug( "$fname: user must log in\n" );
 204                                 $this->userNotLoggedInPage();
 205                                 wfProfileOut( $fname );
 206                                 return;
 207                         } else {
 208                                 wfDebug( "$fname: read-only page\n" );
 209                                 $wgOut->readOnlyPage( $this->mArticle->getContent(), true );
 210                                 wfProfileOut( $fname );
 211                                 return;
 212                         }
 213                 }
 214                 if ($wgEmailConfirmToEdit && !$wgUser->isEmailConfirmed()) {
 215                         wfDebug("$fname: user must confirm e-mail address\n");
 216                         $this->userNotConfirmedPage();
 217                         wfProfileOut($fname);
 218                         return;
 219                 }
 220                 if ( !$this->mTitle->userCan( 'create' ) && !$this->mTitle->exists() ) {
 221                         wfDebug( "$fname: no create permission\n" );
 222                         $this->noCreatePermission();
 223                         wfProfileOut( $fname );
 224                         return;
 225                 }
 226                 if ( wfReadOnly() ) {
 227                         wfDebug( "$fname: read-only mode is engaged\n" );
 228                         if( $this->save || $this->preview ) {
 229                                 $this->formtype = 'preview';
 230                         } else if ( $this->diff ) {
 231                                 $this->formtype = 'diff';
 232                         } else {
 233                                 $wgOut->readOnlyPage( $this->mArticle->getContent() );
 234                                 wfProfileOut( $fname );
 235                                 return;
 236                         }
 237                 } else {
 238                         if ( $this->save ) {
 239                                 $this->formtype = 'save';
 240                         } else if ( $this->preview ) {
 241                                 $this->formtype = 'preview';
 242                         } else if ( $this->diff ) {
 243                                 $this->formtype = 'diff';
 244                         } else { # First time through
 245                                 $this->firsttime = true;
 246                                 if( $this->previewOnOpen() ) {
 247                                         $this->formtype = 'preview';
 248                                 } else {
 249                                         $this->extractMetaDataFromArticle () ;
 250                                         $this->formtype = 'initial';
 251                                 }
 252                         }
 253                 }
 254
 255                 wfProfileIn( "$fname-business-end" );
 256
 257                 $this->isConflict = false;
 258                 // css / js subpages of user pages get a special treatment
 259                 $this->isCssJsSubpage      = $wgTitle->isCssJsSubpage();
 260                 $this->isValidCssJsSubpage = $wgTitle->isValidCssJsSubpage();
 261
 262                 /* Notice that we can't use isDeleted, because it returns true if article is ever deleted
 263                  * no matter it's current state
 264                  */
 265                 $this->deletedSinceEdit = false;
 266                 if ( $this->edittime != '' ) {
 267                         /* Note that we rely on logging table, which hasn't been always there,
 268                          * but that doesn't matter, because this only applies to brand new
 269                          * deletes. This is done on every preview and save request. Move it further down
 270                          * to only perform it on saves
 271                          */
 272                         if ( $this->mTitle->isDeleted() ) {
 273                                 $this->lastDelete = $this->getLastDelete();
 274                                 if ( !is_null($this->lastDelete) ) {
 275                                         $deletetime = $this->lastDelete->log_timestamp;
 276                                         if ( ($deletetime - $this->starttime) > 0 ) {
 277                                                 $this->deletedSinceEdit = true;
 278                                         }
 279                                 }
 280                         }
 281                 }
 282
 283                 if(!$this->mTitle->getArticleID() && ('initial' == $this->formtype || $this->firsttime )) { # new article
 284                         $this->showIntro();
 285                 }
 286                 if( $this->mTitle->isTalkPage() ) {
 287                         $wgOut->addWikiText( wfMsg( 'talkpagetext' ) );
 288                 }
 289
 290                 # Attempt submission here.  This will check for edit conflicts,
 291                 # and redundantly check for locked database, blocked IPs, etc.
 292                 # that edit() already checked just in case someone tries to sneak
 293                 # in the back door with a hand-edited submission URL.
 294
 295                 if ( 'save' == $this->formtype ) {
 296                         if ( !$this->attemptSave() ) {
 297                                 wfProfileOut( "$fname-business-end" );
 298                                 wfProfileOut( $fname );
 299                                 return;
 300                         }
 301                 }
 302
 303                 # First time through: get contents, set time for conflict
 304                 # checking, etc.
 305                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 306                         $this->initialiseForm();
 307                 }
 308
 309                 $this->showEditForm();
 310                 wfProfileOut( "$fname-business-end" );
 311                 wfProfileOut( $fname );
 312         }
 313
 314         /**
 315          * Return true if this page should be previewed when the edit form
 316          * is initially opened.
 317          * @return bool
 318          * @private
 319          */
 320         function previewOnOpen() {
 321                 global $wgUser;
 322                 return $this->section != 'new' &&
 323                         ( ( $wgUser->getOption( 'previewonfirst' ) && $this->mTitle->exists() ) ||
 324                                 ( $this->mTitle->getNamespace() == NS_CATEGORY &&
 325                                         !$this->mTitle->exists() ) );
 326         }
 327
 328         /**
 329          * @todo document
 330          * @param $request
 331          */
 332         function importFormData( &$request ) {
 333                 global $wgLang, $wgUser;
 334                 $fname = 'EditPage::importFormData';
 335                 wfProfileIn( $fname );
 336
 337                 if( $request->wasPosted() ) {
 338                         # These fields need to be checked for encoding.
 339                         # Also remove trailing whitespace, but don't remove _initial_
 340                         # whitespace from the text boxes. This may be significant formatting.
 341                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 342                         $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
 343                         $this->mMetaData = rtrim( $request->getText( 'metadata'   ) );
 344                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 345                         $this->summary   = $wgLang->truncate( $request->getText( 'wpSummary'  ), 250 );
 346
 347                         $this->edittime = $request->getVal( 'wpEdittime' );
 348                         $this->starttime = $request->getVal( 'wpStarttime' );
 349
 350                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 351
 352                         if( is_null( $this->edittime ) ) {
 353                                 # If the form is incomplete, force to preview.
 354                                 wfDebug( "$fname: Form data appears to be incomplete\n" );
 355                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 356                                 $this->preview  = true;
 357                         } else {
 358                                 /* Fallback for live preview */
 359                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 360                                 $this->diff = $request->getCheck( 'wpDiff' );
 361
 362                                 // Remember whether a save was requested, so we can indicate
 363                                 // if we forced preview due to session failure.
 364                                 $this->mTriedSave = !$this->preview;
 365
 366                                 if ( $this->tokenOk( $request ) ) {
 367                                         # Some browsers will not report any submit button
 368                                         # if the user hits enter in the comment box.
 369                                         # The unmarked state will be assumed to be a save,
 370                                         # if the form seems otherwise complete.
 371                                         wfDebug( "$fname: Passed token check.\n" );
 372                                 } else {
 373                                         # Page might be a hack attempt posted from
 374                                         # an external site. Preview instead of saving.
 375                                         wfDebug( "$fname: Failed token check; forcing preview\n" );
 376                                         $this->preview = true;
 377                                 }
 378                         }
 379                         $this->save    = ! ( $this->preview OR $this->diff );
 380                         if( !preg_match( '/^\d{14}$/', $this->edittime )) {
 381                                 $this->edittime = null;
 382                         }
 383
 384                         if( !preg_match( '/^\d{14}$/', $this->starttime )) {
 385                                 $this->starttime = null;
 386                         }
 387
 388                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 389
 390                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 391                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 392
 393                         # Don't force edit summaries when a user is editing their own user or talk page
 394                         if( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) && $this->mTitle->getText() == $wgUser->getName() ) {
 395                                 $this->allowBlankSummary = true;
 396                         } else {
 397                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' );
 398                         }
 399
 400                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 401                 } else {
 402                         # Not a posted form? Start with nothing.
 403                         wfDebug( "$fname: Not a posted form.\n" );
 404                         $this->textbox1  = '';
 405                         $this->textbox2  = '';
 406                         $this->mMetaData = '';
 407                         $this->summary   = '';
 408                         $this->edittime  = '';
 409                         $this->starttime = wfTimestampNow();
 410                         $this->preview   = false;
 411                         $this->save      = false;
 412                         $this->diff      = false;
 413                         $this->minoredit = false;
 414                         $this->watchthis = false;
 415                         $this->recreate  = false;
 416                 }
 417
 418                 $this->oldid = $request->getInt( 'oldid' );
 419
 420                 # Section edit can come from either the form or a link
 421                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 422
 423                 $this->live = $request->getCheck( 'live' );
 424                 $this->editintro = $request->getText( 'editintro' );
 425
 426                 wfProfileOut( $fname );
 427         }
 428
 429         /**
 430          * Make sure the form isn't faking a user's credentials.
 431          *
 432          * @param $request WebRequest
 433          * @return bool
 434          * @private
 435          */
 436         function tokenOk( &$request ) {
 437                 global $wgUser;
 438                 if( $wgUser->isAnon() ) {
 439                         # Anonymous users may not have a session
 440                         # open. Don't tokenize.
 441                         $this->mTokenOk = true;
 442                 } else {
 443                         $this->mTokenOk = $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
 444                 }
 445                 return $this->mTokenOk;
 446         }
 447
 448         /** */
 449         function showIntro() {
 450                 global $wgOut, $wgUser;
 451                 $addstandardintro=true;
 452                 if($this->editintro) {
 453                         $introtitle=Title::newFromText($this->editintro);
 454                         if(isset($introtitle) && $introtitle->userCanRead()) {
 455                                 $rev=Revision::newFromTitle($introtitle);
 456                                 if($rev) {
 457                                         $wgOut->addSecondaryWikiText($rev->getText());
 458                                         $addstandardintro=false;
 459                                 }
 460                         }
 461                 }
 462                 if($addstandardintro) {
 463                         if ( $wgUser->isLoggedIn() )
 464                                 $wgOut->addWikiText( wfMsg( 'newarticletext' ) );
 465                         else
 466                                 $wgOut->addWikiText( wfMsg( 'newarticletextanon' ) );
 467                 }
 468         }
 469
 470         /**
 471          * Attempt submission
 472          * @return bool false if output is done, true if the rest of the form should be displayed
 473          */
 474         function attemptSave() {
 475                 global $wgSpamRegex, $wgFilterCallback, $wgUser, $wgOut;
 476                 global $wgMaxArticleSize;
 477
 478                 $fname = 'EditPage::attemptSave';
 479                 wfProfileIn( $fname );
 480                 wfProfileIn( "$fname-checks" );
 481
 482                 # Reintegrate metadata
 483                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 484                 $this->mMetaData = '' ;
 485
 486                 # Check for spam
 487                 if ( $wgSpamRegex && preg_match( $wgSpamRegex, $this->textbox1, $matches ) ) {
 488                         $this->spamPage ( $matches[0] );
 489                         wfProfileOut( "$fname-checks" );
 490                         wfProfileOut( $fname );
 491                         return false;
 492                 }
 493                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section ) ) {
 494                         # Error messages or other handling should be performed by the filter function
 495                         wfProfileOut( $fname );
 496                         wfProfileOut( "$fname-checks" );
 497                         return false;
 498                 }
 499                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError ) ) ) {
 500                         # Error messages etc. could be handled within the hook...
 501                         wfProfileOut( $fname );
 502                         wfProfileOut( "$fname-checks" );
 503                         return false;
 504                 } elseif( $this->hookError != '' ) {
 505                         # ...or the hook could be expecting us to produce an error
 506                         wfProfileOut( "$fname-checks " );
 507                         wfProfileOut( $fname );
 508                         return true;
 509                 }
 510                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 511                         # Check block state against master, thus 'false'.
 512                         $this->blockedIPpage();
 513                         wfProfileOut( "$fname-checks" );
 514                         wfProfileOut( $fname );
 515                         return false;
 516                 }
 517                 $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 518                 if ( $this->kblength > $wgMaxArticleSize ) {
 519                         // Error will be displayed by showEditForm()
 520                         $this->tooBig = true;
 521                         wfProfileOut( "$fname-checks" );
 522                         wfProfileOut( $fname );
 523                         return true;
 524                 }
 525
 526                 if ( !$wgUser->isAllowed('edit') ) {
 527                         if ( $wgUser->isAnon() ) {
 528                                 $this->userNotLoggedInPage();
 529                                 wfProfileOut( "$fname-checks" );
 530                                 wfProfileOut( $fname );
 531                                 return false;
 532                         }
 533                         else {
 534                                 $wgOut->readOnlyPage();
 535                                 wfProfileOut( "$fname-checks" );
 536                                 wfProfileOut( $fname );
 537                                 return false;
 538                         }
 539                 }
 540
 541                 if ( wfReadOnly() ) {
 542                         $wgOut->readOnlyPage();
 543                         wfProfileOut( "$fname-checks" );
 544                         wfProfileOut( $fname );
 545                         return false;
 546                 }
 547                 if ( $wgUser->pingLimiter() ) {
 548                         $wgOut->rateLimited();
 549                         wfProfileOut( "$fname-checks" );
 550                         wfProfileOut( $fname );
 551                         return false;
 552                 }
 553
 554                 # If the article has been deleted while editing, don't save it without
 555                 # confirmation
 556                 if ( $this->deletedSinceEdit && !$this->recreate ) {
 557                         wfProfileOut( "$fname-checks" );
 558                         wfProfileOut( $fname );
 559                         return true;
 560                 }
 561
 562                 wfProfileOut( "$fname-checks" );
 563
 564                 # If article is new, insert it.
 565                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 566                 if ( 0 == $aid ) {
 567                         // Late check for create permission, just in case *PARANOIA*
 568                         if ( !$this->mTitle->userCan( 'create' ) ) {
 569                                 wfDebug( "$fname: no create permission\n" );
 570                                 $this->noCreatePermission();
 571                                 wfProfileOut( $fname );
 572                                 return;
 573                         }
 574
 575                         # Don't save a new article if it's blank.
 576                         if ( ( '' == $this->textbox1 ) ) {
 577                                         $wgOut->redirect( $this->mTitle->getFullURL() );
 578                                         wfProfileOut( $fname );
 579                                         return false;
 580                         }
 581
 582                         # If no edit comment was given when creating a new page, and what's being
 583                         # created is a redirect, be smart and fill in a neat auto-comment
 584                         if( $this->summary == '' ) {
 585                                 $rt = Title::newFromRedirect( $this->textbox1 );
 586                                 if( is_object( $rt ) )
 587                                         $this->summary = wfMsgForContent( 'autoredircomment', $rt->getPrefixedText() );
 588                         }
 589
 590                         $isComment=($this->section=='new');
 591                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 592                                 $this->minoredit, $this->watchthis, false, $isComment);
 593
 594                         wfProfileOut( $fname );
 595                         return false;
 596                 }
 597
 598                 # Article exists. Check for edit conflict.
 599
 600                 $this->mArticle->clear(); # Force reload of dates, etc.
 601                 $this->mArticle->forUpdate( true ); # Lock the article
 602
 603                 if( $this->mArticle->getTimestamp() != $this->edittime ) {
 604                         $this->isConflict = true;
 605                         if( $this->section == 'new' ) {
 606                                 if( $this->mArticle->getUserText() == $wgUser->getName() &&
 607                                         $this->mArticle->getComment() == $this->summary ) {
 608                                         // Probably a duplicate submission of a new comment.
 609                                         // This can happen when squid resends a request after
 610                                         // a timeout but the first one actually went through.
 611                                         wfDebug( "EditPage::editForm duplicate new section submission; trigger edit conflict!\n" );
 612                                 } else {
 613                                         // New comment; suppress conflict.
 614                                         $this->isConflict = false;
 615                                         wfDebug( "EditPage::editForm conflict suppressed; new section\n" );
 616                                 }
 617                         }
 618                 }
 619                 $userid = $wgUser->getID();
 620
 621                 if ( $this->isConflict) {
 622                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 623                                 $this->mArticle->getTimestamp() . "'\n" );
 624                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime);
 625                 }
 626                 else {
 627                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 628                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary);
 629                 }
 630                 if( is_null( $text ) ) {
 631                         wfDebug( "EditPage::editForm activating conflict; section replace failed.\n" );
 632                         $this->isConflict = true;
 633                         $text = $this->textbox1;
 634                 }
 635
 636                 # Suppress edit conflict with self, except for section edits where merging is required.
 637                 if ( ( $this->section == '' ) && ( 0 != $userid ) && ( $this->mArticle->getUser() == $userid ) ) {
 638                         wfDebug( "Suppressing edit conflict, same user.\n" );
 639                         $this->isConflict = false;
 640                 } else {
 641                         # switch from section editing to normal editing in edit conflict
 642                         if($this->isConflict) {
 643                                 # Attempt merge
 644                                 if( $this->mergeChangesInto( $text ) ){
 645                                         // Successful merge! Maybe we should tell the user the good news?
 646                                         $this->isConflict = false;
 647                                         wfDebug( "Suppressing edit conflict, successful merge.\n" );
 648                                 } else {
 649                                         $this->section = '';
 650                                         $this->textbox1 = $text;
 651                                         wfDebug( "Keeping edit conflict, failed merge.\n" );
 652                                 }
 653                         }
 654                 }
 655
 656                 if ( $this->isConflict ) {
 657                         wfProfileOut( $fname );
 658                         return true;
 659                 }
 660
 661                 # Handle the user preference to force summaries here
 662                 if( $this->section != 'new' && !$this->allowBlankSummary && $wgUser->getOption( 'forceeditsummary' ) ) {
 663                         if( md5( $this->summary ) == $this->autoSumm ) {
 664                                 $this->missingSummary = true;
 665                                 wfProfileOut( $fname );
 666                                 return( true );
 667                         }
 668                 }
 669
 670                 # All's well
 671                 wfProfileIn( "$fname-sectionanchor" );
 672                 $sectionanchor = '';
 673                 if( $this->section == 'new' ) {
 674                         if ( $this->textbox1 == '' ) {
 675                                 $this->missingComment = true;
 676                                 return true;
 677                         }
 678                         if( $this->summary != '' ) {
 679                                 $sectionanchor = $this->sectionAnchor( $this->summary );
 680                         }
 681                 } elseif( $this->section != '' ) {
 682                         # Try to get a section anchor from the section source, redirect to edited section if header found
 683                         # XXX: might be better to integrate this into Article::replaceSection
 684                         # for duplicate heading checking and maybe parsing
 685                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 686                         # we can't deal with anchors, includes, html etc in the header for now,
 687                         # headline would need to be parsed to improve this
 688                         if($hasmatch and strlen($matches[2]) > 0) {
 689                                 $sectionanchor = $this->sectionAnchor( $matches[2] );
 690                         }
 691                 }
 692                 wfProfileOut( "$fname-sectionanchor" );
 693
 694                 // Save errors may fall down to the edit form, but we've now
 695                 // merged the section into full text. Clear the section field
 696                 // so that later submission of conflict forms won't try to
 697                 // replace that into a duplicated mess.
 698                 $this->textbox1 = $text;
 699                 $this->section = '';
 700
 701                 // Check for length errors again now that the section is merged in
 702                 $this->kblength = (int)(strlen( $text ) / 1024);
 703                 if ( $this->kblength > $wgMaxArticleSize ) {
 704                         $this->tooBig = true;
 705                         wfProfileOut( $fname );
 706                         return true;
 707                 }
 708
 709                 # update the article here
 710                 if( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
 711                         $this->watchthis, '', $sectionanchor ) ) {
 712                         wfProfileOut( $fname );
 713                         return false;
 714                 } else {
 715                         $this->isConflict = true;
 716                 }
 717                 wfProfileOut( $fname );
 718                 return true;
 719         }
 720
 721         /**
 722          * Initialise form fields in the object
 723          * Called on the first invocation, e.g. when a user clicks an edit link
 724          */
 725         function initialiseForm() {
 726                 $this->edittime = $this->mArticle->getTimestamp();
 727                 $this->textbox1 = $this->mArticle->getContent();
 728                 $this->summary = '';
 729                 if ( !$this->mArticle->exists() && $this->mArticle->mTitle->getNamespace() == NS_MEDIAWIKI )
 730                         $this->textbox1 = wfMsgWeirdKey ( $this->mArticle->mTitle->getText() ) ;
 731                 wfProxyCheck();
 732         }
 733
 734         /**
 735          * Send the edit form and related headers to $wgOut
 736          * @param $formCallback Optional callable that takes an OutputPage
 737          *                      parameter; will be called during form output
 738          *                      near the top, for captchas and the like.
 739          */
 740         function showEditForm( $formCallback=null ) {
 741                 global $wgOut, $wgUser, $wgLang, $wgContLang, $wgMaxArticleSize;
 742
 743                 $fname = 'EditPage::showEditForm';
 744                 wfProfileIn( $fname );
 745
 746                 $sk =& $wgUser->getSkin();
 747
 748                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) ) ;
 749
 750                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 751
 752                 # Enabled article-related sidebar, toplinks, etc.
 753                 $wgOut->setArticleRelated( true );
 754
 755                 if ( $this->isConflict ) {
 756                         $s = wfMsg( 'editconflict', $this->mTitle->getPrefixedText() );
 757                         $wgOut->setPageTitle( $s );
 758                         $wgOut->addWikiText( wfMsg( 'explainconflict' ) );
 759
 760                         $this->textbox2 = $this->textbox1;
 761                         $this->textbox1 = $this->mArticle->getContent();
 762                         $this->edittime = $this->mArticle->getTimestamp();
 763                 } else {
 764
 765                         if( $this->section != '' ) {
 766                                 if( $this->section == 'new' ) {
 767                                         $s = wfMsg('editingcomment', $this->mTitle->getPrefixedText() );
 768                                 } else {
 769                                         $s = wfMsg('editingsection', $this->mTitle->getPrefixedText() );
 770                                         if( !$this->preview && !$this->diff ) {
 771                                                 preg_match( "/^(=+)(.+)\\1/mi",
 772                                                         $this->textbox1,
 773                                                         $matches );
 774                                                 if( !empty( $matches[2] ) ) {
 775                                                         $this->summary = "/* ". trim($matches[2])." */ ";
 776                                                 }
 777                                         }
 778                                 }
 779                         } else {
 780                                 $s = wfMsg( 'editing', $this->mTitle->getPrefixedText() );
 781                         }
 782                         $wgOut->setPageTitle( $s );
 783
 784                         if ( $this->missingComment ) {
 785                                 $wgOut->addWikiText( wfMsg( 'missingcommenttext' ) );
 786                         }
 787
 788                         if( $this->missingSummary ) {
 789                                 $wgOut->addWikiText( wfMsg( 'missingsummary' ) );
 790                         }
 791
 792                         if( !$this->hookError == '' ) {
 793                                 $wgOut->addWikiText( $this->hookError );
 794                         }
 795
 796                         if ( !$this->checkUnicodeCompliantBrowser() ) {
 797                                 $wgOut->addWikiText( wfMsg( 'nonunicodebrowser') );
 798                         }
 799                         if ( isset( $this->mArticle )
 800                              && isset( $this->mArticle->mRevision )
 801                              && !$this->mArticle->mRevision->isCurrent() ) {
 802                                 $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
 803                                 $wgOut->addWikiText( wfMsg( 'editingold' ) );
 804                         }
 805                 }
 806
 807                 if( wfReadOnly() ) {
 808                         $wgOut->addWikiText( wfMsg( 'readonlywarning' ) );
 809                 } elseif( $wgUser->isAnon() && $this->formtype != 'preview' ) {
 810                         $wgOut->addWikiText( wfMsg( 'anoneditwarning' ) );
 811                 } else {
 812                         if( $this->isCssJsSubpage && $this->formtype != 'preview' ) {
 813                                 # Check the skin exists
 814                                 if( $this->isValidCssJsSubpage ) {
 815                                         $wgOut->addWikiText( wfMsg( 'usercssjsyoucanpreview' ) );
 816                                 } else {
 817                                         $wgOut->addWikiText( wfMsg( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
 818                                 }
 819                         }
 820                 }
 821
 822                 if( $this->mTitle->isProtected( 'edit' ) ) {
 823                         # Is the protection due to the namespace, e.g. interface text?
 824                         if( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 825                                 # Yes; remind the user
 826                                 $notice = wfMsg( 'editinginterface' );
 827                         } elseif( $this->mTitle->isSemiProtected() ) {
 828                                 # No; semi protected
 829                                 $notice = wfMsg( 'semiprotectedpagewarning' );
 830                                 if( wfEmptyMsg( 'semiprotectedpagewarning', $notice ) || $notice == '-' ) {
 831                                         $notice = '';
 832                                 }
 833                         } else {
 834                                 # No; regular protection
 835                                 $notice = wfMsg( 'protectedpagewarning' );
 836                         }
 837                         $wgOut->addWikiText( $notice );
 838                 }
 839
 840                 if ( $this->kblength === false ) {
 841                         $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 842                 }
 843                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
 844                         $wgOut->addWikiText( wfMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgMaxArticleSize ) );
 845                 } elseif( $this->kblength > 29 ) {
 846                         $wgOut->addWikiText( wfMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) ) );
 847                 }
 848
 849                 $rows = $wgUser->getIntOption( 'rows' );
 850                 $cols = $wgUser->getIntOption( 'cols' );
 851
 852                 $ew = $wgUser->getOption( 'editwidth' );
 853                 if ( $ew ) $ew = " style=\"width:100%\"";
 854                 else $ew = '';
 855
 856                 $q = 'action=submit';
 857                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
 858                 $action = $this->mTitle->escapeLocalURL( $q );
 859
 860                 $summary = wfMsg('summary');
 861                 $subject = wfMsg('subject');
 862                 $minor   = wfMsgExt('minoredit', array('parseinline'));
 863                 $watchthis = wfMsgExt('watchthis', array('parseinline'));
 864
 865                 $cancel = $sk->makeKnownLink( $this->mTitle->getPrefixedText(),
 866                                 wfMsgExt('cancel', array('parseinline')) );
 867                 $edithelpurl = $sk->makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ));
 868                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
 869                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
 870                         htmlspecialchars( wfMsg( 'newwindow' ) );
 871
 872                 global $wgRightsText;
 873                 $copywarn = "<div id=\"editpage-copywarn\">\n" .
 874                         wfMsg( $wgRightsText ? 'copyrightwarning' : 'copyrightwarning2',
 875                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
 876                                 $wgRightsText ) . "\n</div>";
 877
 878                 if( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
 879                         # prepare toolbar for edit buttons
 880                         $toolbar = $this->getEditToolbar();
 881                 } else {
 882                         $toolbar = '';
 883                 }
 884
 885                 // activate checkboxes if user wants them to be always active
 886                 if( !$this->preview && !$this->diff ) {
 887                         # Sort out the "watch" checkbox
 888                         if( $wgUser->getOption( 'watchdefault' ) ) {
 889                                 # Watch all edits
 890                                 $this->watchthis = true;
 891                         } elseif( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 892                                 # Watch creations
 893                                 $this->watchthis = true;
 894                         } elseif( $this->mTitle->userIsWatching() ) {
 895                                 # Already watched
 896                                 $this->watchthis = true;
 897                         }
 898
 899                         if( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
 900                 }
 901
 902                 $minoredithtml = '';
 903
 904                 if ( $wgUser->isAllowed('minoredit') ) {
 905                         $minoredithtml =
 906                                 "<input tabindex='3' type='checkbox' value='1' name='wpMinoredit'".($this->minoredit?" checked='checked'":"").
 907                                 " accesskey='".wfMsg('accesskey-minoredit')."' id='wpMinoredit' />\n".
 908                                 "<label for='wpMinoredit' title='".wfMsg('tooltip-minoredit')."'>{$minor}</label>\n";
 909                 }
 910
 911                 $watchhtml = '';
 912
 913                 if ( $wgUser->isLoggedIn() ) {
 914                         $watchhtml = "<input tabindex='4' type='checkbox' name='wpWatchthis'".
 915                                 ($this->watchthis?" checked='checked'":"").
 916                                 " accesskey=\"".htmlspecialchars(wfMsg('accesskey-watch'))."\" id='wpWatchthis'  />\n".
 917                                 "<label for='wpWatchthis' title=\"" .
 918                                         htmlspecialchars(wfMsg('tooltip-watch'))."\">{$watchthis}</label>\n";
 919                 }
 920
 921                 $checkboxhtml = $minoredithtml . $watchhtml;
 922
 923                 if ( $wgUser->getOption( 'previewontop' ) ) {
 924
 925                         if ( 'preview' == $this->formtype ) {
 926                                 $this->showPreview();
 927                         } else {
 928                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
 929                         }
 930
 931                         if ( 'diff' == $this->formtype ) {
 932                                 $wgOut->addHTML( $this->getDiff() );
 933                         }
 934                 }
 935
 936
 937                 # if this is a comment, show a subject line at the top, which is also the edit summary.
 938                 # Otherwise, show a summary field at the bottom
 939                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
 940                 if( $this->section == 'new' ) {
 941                         $commentsubject="<span id='wpSummaryLabel'><label for='wpSummary'>{$subject}:</label></span>\n<div class='editOptions'>\n<input tabindex='1' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
 942                         $editsummary = '';
 943                 } else {
 944                         $commentsubject = '';
 945                         $editsummary="<span id='wpSummaryLabel'><label for='wpSummary'>{$summary}:</label></span>\n<div class='editOptions'>\n<input tabindex='2' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
 946                 }
 947
 948                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
 949                 if( !$this->preview && !$this->diff ) {
 950                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
 951                 }
 952                 $templates = $this->formatTemplates();
 953
 954                 global $wgUseMetadataEdit ;
 955                 if ( $wgUseMetadataEdit ) {
 956                         $metadata = $this->mMetaData ;
 957                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
 958                         $top = wfMsgWikiHtml( 'metadata_help' );
 959                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
 960                 }
 961                 else $metadata = "" ;
 962
 963                 $hidden = '';
 964                 $recreate = '';
 965                 if ($this->deletedSinceEdit) {
 966                         if ( 'save' != $this->formtype ) {
 967                                 $wgOut->addWikiText( wfMsg('deletedwhileediting'));
 968                         } else {
 969                                 // Hide the toolbar and edit area, use can click preview to get it back
 970                                 // Add an confirmation checkbox and explanation.
 971                                 $toolbar = '';
 972                                 $hidden = 'type="hidden" style="display:none;"';
 973                                 $recreate = $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ));
 974                                 $recreate .=
 975                                         "<br /><input tabindex='1' type='checkbox' value='1' name='wpRecreate' id='wpRecreate' />".
 976                                         "<label for='wpRecreate' title='".wfMsg('tooltip-recreate')."'>". wfMsg('recreate')."</label>";
 977                         }
 978                 }
 979
 980                 $temp = array(
 981                         'id'        => 'wpSave',
 982                         'name'      => 'wpSave',
 983                         'type'      => 'submit',
 984                         'tabindex'  => '5',
 985                         'value'     => wfMsg('savearticle'),
 986                         'accesskey' => wfMsg('accesskey-save'),
 987                         'title'     => wfMsg('tooltip-save'),
 988                 );
 989                 $buttons['save'] = wfElement('input', $temp, '');
 990                 $temp = array(
 991                         'id'        => 'wpDiff',
 992                         'name'      => 'wpDiff',
 993                         'type'      => 'submit',
 994                         'tabindex'  => '7',
 995                         'value'     => wfMsg('showdiff'),
 996                         'accesskey' => wfMsg('accesskey-diff'),
 997                         'title'     => wfMsg('tooltip-diff'),
 998                 );
 999                 $buttons['diff'] = wfElement('input', $temp, '');
1000
1001                 global $wgLivePreview;
1002                 if ( $wgLivePreview && $wgUser->getOption( 'uselivepreview' ) ) {
1003                         $temp = array(
1004                                 'id'        => 'wpPreview',
1005                                 'name'      => 'wpPreview',
1006                                 'type'      => 'submit',
1007                                 'tabindex'  => '6',
1008                                 'value'     => wfMsg('showpreview'),
1009                                 'accesskey' => '',
1010                                 'title'     => wfMsg('tooltip-preview'),
1011                                 'style'     => 'display: none;',
1012                         );
1013                         $buttons['preview'] = wfElement('input', $temp, '');
1014                         $temp = array(
1015                                 'id'        => 'wpLivePreview',
1016                                 'name'      => 'wpLivePreview',
1017                                 'type'      => 'submit',
1018                                 'tabindex'  => '6',
1019                                 'value'     => wfMsg('showlivepreview'),
1020                                 'accesskey' => wfMsg('accesskey-preview'),
1021                                 'title'     => '',
1022                                 'onclick'   => $this->doLivePreviewScript(),
1023                         );
1024                         $buttons['live'] = wfElement('input', $temp, '');
1025                 } else {
1026                         $temp = array(
1027                                 'id'        => 'wpPreview',
1028                                 'name'      => 'wpPreview',
1029                                 'type'      => 'submit',
1030                                 'tabindex'  => '6',
1031                                 'value'     => wfMsg('showpreview'),
1032                                 'accesskey' => wfMsg('accesskey-preview'),
1033                                 'title'     => wfMsg('tooltip-preview'),
1034                         );
1035                         $buttons['preview'] = wfElement('input', $temp, '');
1036                         $buttons['live'] = '';
1037                 }
1038
1039                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
1040                         ? ""
1041                         : "<input type='hidden' name=\"safemode\" value='1' />\n";
1042
1043                 $wgOut->addHTML( <<<END
1044 {$toolbar}
1045 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1046 END
1047 );
1048
1049                 if( is_callable( $formCallback ) ) {
1050                         call_user_func_array( $formCallback, array( &$wgOut ) );
1051                 }
1052
1053                 // Put these up at the top to ensure they aren't lost on early form submission
1054                 $wgOut->addHTML( "
1055 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
1056 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
1057 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
1058 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
1059
1060                 $wgOut->addHTML( <<<END
1061 $recreate
1062 {$commentsubject}
1063 <textarea tabindex='1' accesskey="," name="wpTextbox1" id="wpTextbox1" rows='{$rows}'
1064 cols='{$cols}'{$ew} $hidden>
1065 END
1066 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox1 ) ) .
1067 "
1068 </textarea>
1069                 " );
1070
1071                 $wgOut->addWikiText( $copywarn );
1072                 $wgOut->addHTML( "
1073 {$metadata}
1074 {$editsummary}
1075 {$checkboxhtml}
1076 {$safemodehtml}
1077 ");
1078
1079                 $wgOut->addHTML(
1080 "<div class='editButtons'>
1081         {$buttons['save']}
1082         {$buttons['preview']}
1083         {$buttons['live']}
1084         {$buttons['diff']}
1085         <span class='editHelp'>{$cancel} | {$edithelp}</span>
1086 </div><!-- editButtons -->
1087 </div><!-- editOptions -->");
1088
1089                 $wgOut->addWikiText( wfMsgForContent( 'edittools' ) );
1090
1091                 $wgOut->addHTML( "
1092 <div class='templatesUsed'>
1093 {$templates}
1094 </div>
1095 " );
1096
1097                 if ( $wgUser->isLoggedIn() ) {
1098                         /**
1099                          * To make it harder for someone to slip a user a page
1100                          * which submits an edit form to the wiki without their
1101                          * knowledge, a random token is associated with the login
1102                          * session. If it's not passed back with the submission,
1103                          * we won't save the page, or render user JavaScript and
1104                          * CSS previews.
1105                          */
1106                         $token = htmlspecialchars( $wgUser->editToken() );
1107                         $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
1108                 }
1109
1110                 # If a blank edit summary was previously provided, and the appropriate
1111                 # user preference is active, pass a hidden tag here. This will stop the
1112                 # user being bounced back more than once in the event that a summary
1113                 # is not required.
1114                 if( $this->missingSummary ) {
1115                         $wgOut->addHTML( "<input type=\"hidden\" name=\"wpIgnoreBlankSummary\" value=\"1\" />\n" );
1116                 }
1117
1118                 # For a bit more sophisticated detection of blank summaries, hash the
1119                 # automatic one and pass that in a hidden field.
1120                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1121                 $wgOut->addHtml( wfHidden( 'wpAutoSummary', $autosumm ) );
1122
1123                 if ( $this->isConflict ) {
1124                         require_once( "DifferenceEngine.php" );
1125                         $wgOut->addWikiText( '==' . wfMsg( "yourdiff" ) . '==' );
1126
1127                         $de = new DifferenceEngine( $this->mTitle );
1128                         $de->setText( $this->textbox2, $this->textbox1 );
1129                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1130
1131                         $wgOut->addWikiText( '==' . wfMsg( "yourtext" ) . '==' );
1132                         $wgOut->addHTML( "<textarea tabindex=6 id='wpTextbox2' name=\"wpTextbox2\" rows='{$rows}' cols='{$cols}' wrap='virtual'>"
1133                                 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox2 ) ) . "\n</textarea>" );
1134                 }
1135                 $wgOut->addHTML( "</form>\n" );
1136                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1137
1138                         if ( $this->formtype == 'preview') {
1139                                 $this->showPreview();
1140                         } else {
1141                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
1142                         }
1143
1144                         if ( $this->formtype == 'diff') {
1145                                 $wgOut->addHTML( $this->getDiff() );
1146                         }
1147
1148                 }
1149
1150                 wfProfileOut( $fname );
1151         }
1152
1153         /**
1154          * Append preview output to $wgOut.
1155          * Includes category rendering if this is a category page.
1156          * @private
1157          */
1158         function showPreview() {
1159                 global $wgOut;
1160                 $wgOut->addHTML( '<div id="wikiPreview">' );
1161                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1162                         $this->mArticle->openShowCategory();
1163                 }
1164                 $previewOutput = $this->getPreviewText();
1165                 $wgOut->addHTML( $previewOutput );
1166                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1167                         $this->mArticle->closeShowCategory();
1168                 }
1169                 $wgOut->addHTML( "<br style=\"clear:both;\" />\n" );
1170                 $wgOut->addHTML( '</div>' );
1171         }
1172
1173         /**
1174          * Prepare a list of templates used by this page. Returns HTML.
1175          */
1176         function formatTemplates() {
1177                 global $wgUser;
1178
1179                 $fname = 'EditPage::formatTemplates';
1180                 wfProfileIn( $fname );
1181
1182                 $sk =& $wgUser->getSkin();
1183
1184                 $outText = '';
1185                 $templates = $this->mArticle->getUsedTemplates();
1186                 if ( count( $templates ) > 0 ) {
1187                         # Do a batch existence check
1188                         $batch = new LinkBatch;
1189                         foreach( $templates as $title ) {
1190                                 $batch->addObj( $title );
1191                         }
1192                         $batch->execute();
1193
1194                         # Construct the HTML
1195                         $outText = '<br />'. wfMsgExt( 'templatesused', array( 'parseinline' ) ) . '<ul>';
1196                         foreach ( $templates as $titleObj ) {
1197                                 $outText .= '<li>' . $sk->makeLinkObj( $titleObj ) . '</li>';
1198                         }
1199                         $outText .= '</ul>';
1200                 }
1201                 wfProfileOut( $fname );
1202                 return $outText;
1203         }
1204
1205         /**
1206          * Live Preview lets us fetch rendered preview page content and
1207          * add it to the page without refreshing the whole page.
1208          * If not supported by the browser it will fall through to the normal form
1209          * submission method.
1210          *
1211          * This function outputs a script tag to support live preview, and
1212          * returns an onclick handler which should be added to the attributes
1213          * of the preview button
1214          */
1215         function doLivePreviewScript() {
1216                 global $wgStylePath, $wgJsMimeType, $wgOut, $wgTitle;
1217                 $wgOut->addHTML( '<script type="'.$wgJsMimeType.'" src="' .
1218                         htmlspecialchars( $wgStylePath . '/common/preview.js' ) .
1219                         '"></script>' . "\n" );
1220                 $liveAction = $wgTitle->getLocalUrl( 'action=submit&wpPreview=true&live=true' );
1221                 return "return !livePreview(" .
1222                         "getElementById('wikiPreview')," .
1223                         "editform.wpTextbox1.value," .
1224                         '"' . $liveAction . '"' . ")";
1225         }
1226
1227         function getLastDelete() {
1228                 $dbr =& wfGetDB( DB_SLAVE );
1229                 $fname = 'EditPage::getLastDelete';
1230                 $res = $dbr->select(
1231                         array( 'logging', 'user' ),
1232                         array( 'log_type',
1233                                'log_action',
1234                                'log_timestamp',
1235                                'log_user',
1236                                'log_namespace',
1237                                'log_title',
1238                                'log_comment',
1239                                'log_params',
1240                                'user_name', ),
1241                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1242                                'log_title' => $this->mTitle->getDBkey(),
1243                                'log_type' => 'delete',
1244                                'log_action' => 'delete',
1245                                'user_id=log_user' ),
1246                         $fname,
1247                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
1248
1249                 if($dbr->numRows($res) == 1) {
1250                         while ( $x = $dbr->fetchObject ( $res ) )
1251                                 $data = $x;
1252                         $dbr->freeResult ( $res ) ;
1253                 } else {
1254                         $data = null;
1255                 }
1256                 return $data;
1257         }
1258
1259         /**
1260          * @todo document
1261          */
1262         function getPreviewText() {
1263                 global $wgOut, $wgUser, $wgTitle, $wgParser;
1264
1265                 $fname = 'EditPage::getPreviewText';
1266                 wfProfileIn( $fname );
1267
1268                 if ( $this->mTriedSave && !$this->mTokenOk ) {
1269                         $msg = 'session_fail_preview';
1270                 } else {
1271                         $msg = 'previewnote';
1272                 }
1273                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
1274                         "<div class='previewnote'>" . $wgOut->parse( wfMsg( $msg ) ) . "</div>\n";
1275                 if ( $this->isConflict ) {
1276                         $previewhead.='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1277                 }
1278
1279                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1280                 $parserOptions->setEditSection( false );
1281
1282                 global $wgRawHtml;
1283                 if( $wgRawHtml && !$this->mTokenOk ) {
1284                         // Could be an offsite preview attempt. This is very unsafe if
1285                         // HTML is enabled, as it could be an attack.
1286                         return $wgOut->parse( "<div class='previewnote'>" .
1287                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1288                 }
1289
1290                 # don't parse user css/js, show message about preview
1291                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1292
1293                 if ( $this->isCssJsSubpage ) {
1294                         if(preg_match("/\\.css$/", $wgTitle->getText() ) ) {
1295                                 $previewtext = wfMsg('usercsspreview');
1296                         } else if(preg_match("/\\.js$/", $wgTitle->getText() ) ) {
1297                                 $previewtext = wfMsg('userjspreview');
1298                         }
1299                         $parserOptions->setTidy(true);
1300                         $parserOutput = $wgParser->parse( $previewtext , $wgTitle, $parserOptions );
1301                         $wgOut->addHTML( $parserOutput->mText );
1302                         wfProfileOut( $fname );
1303                         return $previewhead;
1304                 } else {
1305                         # if user want to see preview when he edit an article
1306                         if( $wgUser->getOption('previewonfirst') and ($this->textbox1 == '')) {
1307                                 $this->textbox1 = $this->mArticle->getContent();
1308                         }
1309
1310                         $toparse = $this->textbox1;
1311
1312                         # If we're adding a comment, we need to show the
1313                         # summary as the headline
1314                         if($this->section=="new" && $this->summary!="") {
1315                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1316                         }
1317
1318                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData ;
1319                         $parserOptions->setTidy(true);
1320                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ) ."\n\n",
1321                                         $wgTitle, $parserOptions );
1322
1323                         $previewHTML = $parserOutput->getText();
1324                         $wgOut->addParserOutputNoText( $parserOutput );
1325
1326                         wfProfileOut( $fname );
1327                         return $previewhead . $previewHTML;
1328                 }
1329         }
1330
1331         /**
1332          * Call the stock "user is blocked" page
1333          */
1334         function blockedIPpage() {
1335                 global $wgOut;
1336                 $wgOut->blockedPage();
1337         }
1338
1339         /**
1340          * Produce the stock "please login to edit pages" page
1341          */
1342         function userNotLoggedInPage() {
1343                 global $wgUser, $wgOut;
1344                 $skin = $wgUser->getSkin();
1345
1346                 $loginTitle = Title::makeTitle( NS_SPECIAL, 'Userlogin' );
1347                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $this->mTitle->getPrefixedUrl() );
1348
1349                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1350                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1351                 $wgOut->setArticleRelated( false );
1352
1353                 $wgOut->addHtml( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
1354                 $wgOut->returnToMain( false, $this->mTitle->getPrefixedUrl() );
1355         }
1356
1357         /**
1358          * Creates a basic error page which informs the user that
1359          * they have to validate their email address before being
1360          * allowed to edit.
1361          */
1362         function userNotConfirmedPage() {
1363                 global $wgOut;
1364
1365                 $wgOut->setPageTitle( wfMsg( 'confirmedittitle' ) );
1366                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1367                 $wgOut->setArticleRelated( false );
1368
1369                 $wgOut->addWikiText( wfMsg( 'confirmedittext' ) );
1370                 $wgOut->returnToMain( false );
1371         }
1372
1373         /**
1374          * Produce the stock "your edit contains spam" page
1375          *
1376          * @param $match Text which triggered one or more filters
1377          */
1378         function spamPage( $match = false ) {
1379                 global $wgOut;
1380
1381                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1382                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1383                 $wgOut->setArticleRelated( false );
1384
1385                 $wgOut->addWikiText( wfMsg( 'spamprotectiontext' ) );
1386                 if ( $match )
1387                         $wgOut->addWikiText( wfMsg( 'spamprotectionmatch', "<nowiki>{$match}</nowiki>" ) );
1388
1389                 $wgOut->returnToMain( false );
1390         }
1391
1392         /**
1393          * @private
1394          * @todo document
1395          */
1396         function mergeChangesInto( &$editText ){
1397                 $fname = 'EditPage::mergeChangesInto';
1398                 wfProfileIn( $fname );
1399
1400                 $db =& wfGetDB( DB_MASTER );
1401
1402                 // This is the revision the editor started from
1403                 $baseRevision = Revision::loadFromTimestamp(
1404                         $db, $this->mArticle->mTitle, $this->edittime );
1405                 if( is_null( $baseRevision ) ) {
1406                         wfProfileOut( $fname );
1407                         return false;
1408                 }
1409                 $baseText = $baseRevision->getText();
1410
1411                 // The current state, we want to merge updates into it
1412                 $currentRevision =  Revision::loadFromTitle(
1413                         $db, $this->mArticle->mTitle );
1414                 if( is_null( $currentRevision ) ) {
1415                         wfProfileOut( $fname );
1416                         return false;
1417                 }
1418                 $currentText = $currentRevision->getText();
1419
1420                 if( wfMerge( $baseText, $editText, $currentText, $result ) ){
1421                         $editText = $result;
1422                         wfProfileOut( $fname );
1423                         return true;
1424                 } else {
1425                         wfProfileOut( $fname );
1426                         return false;
1427                 }
1428         }
1429
1430         /**
1431          * Check if the browser is on a blacklist of user-agents known to
1432          * mangle UTF-8 data on form submission. Returns true if Unicode
1433          * should make it through, false if it's known to be a problem.
1434          * @return bool
1435          * @private
1436          */
1437         function checkUnicodeCompliantBrowser() {
1438                 global $wgBrowserBlackList;
1439                 if( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
1440                         // No User-Agent header sent? Trust it by default...
1441                         return true;
1442                 }
1443                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1444                 foreach ( $wgBrowserBlackList as $browser ) {
1445                         if ( preg_match($browser, $currentbrowser) ) {
1446                                 return false;
1447                         }
1448                 }
1449                 return true;
1450         }
1451
1452         /**
1453          * Format an anchor fragment as it would appear for a given section name
1454          * @param string $text
1455          * @return string
1456          * @private
1457          */
1458         function sectionAnchor( $text ) {
1459                 $headline = Sanitizer::decodeCharReferences( $text );
1460                 # strip out HTML
1461                 $headline = preg_replace( '/<.*?' . '>/', '', $headline );
1462                 $headline = trim( $headline );
1463                 $sectionanchor = '#' . urlencode( str_replace( ' ', '_', $headline ) );
1464                 $replacearray = array(
1465                         '%3A' => ':',
1466                         '%' => '.'
1467                 );
1468                 return str_replace(
1469                         array_keys( $replacearray ),
1470                         array_values( $replacearray ),
1471                         $sectionanchor );
1472         }
1473
1474         /**
1475          * Shows a bulletin board style toolbar for common editing functions.
1476          * It can be disabled in the user preferences.
1477          * The necessary JavaScript code can be found in style/wikibits.js.
1478          */
1479         function getEditToolbar() {
1480                 global $wgStylePath, $wgContLang, $wgJsMimeType;
1481
1482                 /**
1483                  * toolarray an array of arrays which each include the filename of
1484                  * the button image (without path), the opening tag, the closing tag,
1485                  * and optionally a sample text that is inserted between the two when no
1486                  * selection is highlighted.
1487                  * The tip text is shown when the user moves the mouse over the button.
1488                  *
1489                  * Already here are accesskeys (key), which are not used yet until someone
1490                  * can figure out a way to make them work in IE. However, we should make
1491                  * sure these keys are not defined on the edit page.
1492                  */
1493                 $toolarray=array(
1494                         array(  'image'=>'button_bold.png',
1495                                         'open'  =>      "\'\'\'",
1496                                         'close' =>      "\'\'\'",
1497                                         'sample'=>      wfMsg('bold_sample'),
1498                                         'tip'   =>      wfMsg('bold_tip'),
1499                                         'key'   =>      'B'
1500                                 ),
1501                         array(  'image'=>'button_italic.png',
1502                                         'open'  =>      "\'\'",
1503                                         'close' =>      "\'\'",
1504                                         'sample'=>      wfMsg('italic_sample'),
1505                                         'tip'   =>      wfMsg('italic_tip'),
1506                                         'key'   =>      'I'
1507                                 ),
1508                         array(  'image'=>'button_link.png',
1509                                         'open'  =>      '[[',
1510                                         'close' =>      ']]',
1511                                         'sample'=>      wfMsg('link_sample'),
1512                                         'tip'   =>      wfMsg('link_tip'),
1513                                         'key'   =>      'L'
1514                                 ),
1515                         array(  'image'=>'button_extlink.png',
1516                                         'open'  =>      '[',
1517                                         'close' =>      ']',
1518                                         'sample'=>      wfMsg('extlink_sample'),
1519                                         'tip'   =>      wfMsg('extlink_tip'),
1520                                         'key'   =>      'X'
1521                                 ),
1522                         array(  'image'=>'button_headline.png',
1523                                         'open'  =>      "\\n== ",
1524                                         'close' =>      " ==\\n",
1525                                         'sample'=>      wfMsg('headline_sample'),
1526                                         'tip'   =>      wfMsg('headline_tip'),
1527                                         'key'   =>      'H'
1528                                 ),
1529                         array(  'image'=>'button_image.png',
1530                                         'open'  =>      '[['.$wgContLang->getNsText(NS_IMAGE).":",
1531                                         'close' =>      ']]',
1532                                         'sample'=>      wfMsg('image_sample'),
1533                                         'tip'   =>      wfMsg('image_tip'),
1534                                         'key'   =>      'D'
1535                                 ),
1536                         array(  'image' =>'button_media.png',
1537                                         'open'  =>      '[['.$wgContLang->getNsText(NS_MEDIA).':',
1538                                         'close' =>      ']]',
1539                                         'sample'=>      wfMsg('media_sample'),
1540                                         'tip'   =>      wfMsg('media_tip'),
1541                                         'key'   =>      'M'
1542                                 ),
1543                         array(  'image' =>'button_math.png',
1544                                         'open'  =>      "<math>",
1545                                         'close' =>      "<\\/math>",
1546                                         'sample'=>      wfMsg('math_sample'),
1547                                         'tip'   =>      wfMsg('math_tip'),
1548                                         'key'   =>      'C'
1549                                 ),
1550                         array(  'image' =>'button_nowiki.png',
1551                                         'open'  =>      "<nowiki>",
1552                                         'close' =>      "<\\/nowiki>",
1553                                         'sample'=>      wfMsg('nowiki_sample'),
1554                                         'tip'   =>      wfMsg('nowiki_tip'),
1555                                         'key'   =>      'N'
1556                                 ),
1557                         array(  'image' =>'button_sig.png',
1558                                         'open'  =>      '--~~~~',
1559                                         'close' =>      '',
1560                                         'sample'=>      '',
1561                                         'tip'   =>      wfMsg('sig_tip'),
1562                                         'key'   =>      'Y'
1563                                 ),
1564                         array(  'image' =>'button_hr.png',
1565                                         'open'  =>      "\\n----\\n",
1566                                         'close' =>      '',
1567                                         'sample'=>      '',
1568                                         'tip'   =>      wfMsg('hr_tip'),
1569                                         'key'   =>      'R'
1570                                 )
1571                 );
1572                 $toolbar = "<div id='toolbar'>\n";
1573                 $toolbar.="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
1574
1575                 foreach($toolarray as $tool) {
1576
1577                         $image=$wgStylePath.'/common/images/'.$tool['image'];
1578                         $open=$tool['open'];
1579                         $close=$tool['close'];
1580                         $sample = wfEscapeJsString( $tool['sample'] );
1581
1582                         // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
1583                         // Older browsers show a "speedtip" type message only for ALT.
1584                         // Ideally these should be different, realistically they
1585                         // probably don't need to be.
1586                         $tip = wfEscapeJsString( $tool['tip'] );
1587
1588                         #$key = $tool["key"];
1589
1590                         $toolbar.="addButton('$image','$tip','$open','$close','$sample');\n";
1591                 }
1592
1593                 $toolbar.="/*]]>*/\n</script>";
1594                 $toolbar.="\n</div>";
1595                 return $toolbar;
1596         }
1597
1598         /**
1599          * Output preview text only. This can be sucked into the edit page
1600          * via JavaScript, and saves the server time rendering the skin as
1601          * well as theoretically being more robust on the client (doesn't
1602          * disturb the edit box's undo history, won't eat your text on
1603          * failure, etc).
1604          *
1605          * @todo This doesn't include category or interlanguage links.
1606          *       Would need to enhance it a bit, maybe wrap them in XML
1607          *       or something... that might also require more skin
1608          *       initialization, so check whether that's a problem.
1609          */
1610         function livePreview() {
1611                 global $wgOut;
1612                 $wgOut->disable();
1613                 header( 'Content-type: text/xml' );
1614                 header( 'Cache-control: no-cache' );
1615                 # FIXME
1616                 echo $this->getPreviewText( );
1617                 /* To not shake screen up and down between preview and live-preview */
1618                 echo "<br style=\"clear:both;\" />\n";
1619         }
1620
1621
1622         /**
1623          * Get a diff between the current contents of the edit box and the
1624          * version of the page we're editing from.
1625          *
1626          * If this is a section edit, we'll replace the section as for final
1627          * save and then make a comparison.
1628          *
1629          * @return string HTML
1630          */
1631         function getDiff() {
1632                 require_once( 'DifferenceEngine.php' );
1633                 $oldtext = $this->mArticle->fetchContent();
1634                 $newtext = $this->mArticle->replaceSection(
1635                         $this->section, $this->textbox1, $this->summary, $this->edittime );
1636                 $newtext = $this->mArticle->preSaveTransform( $newtext );
1637                 $oldtitle = wfMsgExt( 'currentrev', array('parseinline') );
1638                 $newtitle = wfMsgExt( 'yourtext', array('parseinline') );
1639                 if ( $oldtext !== false  || $newtext != '' ) {
1640                         $de = new DifferenceEngine( $this->mTitle );
1641                         $de->setText( $oldtext, $newtext );
1642                         $difftext = $de->getDiff( $oldtitle, $newtitle );
1643                 } else {
1644                         $difftext = '';
1645                 }
1646
1647                 return '<div id="wikiDiff">' . $difftext . '</div>';
1648         }
1649
1650         /**
1651          * Filter an input field through a Unicode de-armoring process if it
1652          * came from an old browser with known broken Unicode editing issues.
1653          *
1654          * @param WebRequest $request
1655          * @param string $field
1656          * @return string
1657          * @private
1658          */
1659         function safeUnicodeInput( $request, $field ) {
1660                 $text = rtrim( $request->getText( $field ) );
1661                 return $request->getBool( 'safemode' )
1662                         ? $this->unmakesafe( $text )
1663                         : $text;
1664         }
1665
1666         /**
1667          * Filter an output field through a Unicode armoring process if it is
1668          * going to an old browser with known broken Unicode editing issues.
1669          *
1670          * @param string $text
1671          * @return string
1672          * @private
1673          */
1674         function safeUnicodeOutput( $text ) {
1675                 global $wgContLang;
1676                 $codedText = $wgContLang->recodeForEdit( $text );
1677                 return $this->checkUnicodeCompliantBrowser()
1678                         ? $codedText
1679                         : $this->makesafe( $codedText );
1680         }
1681
1682         /**
1683          * A number of web browsers are known to corrupt non-ASCII characters
1684          * in a UTF-8 text editing environment. To protect against this,
1685          * detected browsers will be served an armored version of the text,
1686          * with non-ASCII chars converted to numeric HTML character references.
1687          *
1688          * Preexisting such character references will have a 0 added to them
1689          * to ensure that round-trips do not alter the original data.
1690          *
1691          * @param string $invalue
1692          * @return string
1693          * @private
1694          */
1695         function makesafe( $invalue ) {
1696                 // Armor existing references for reversability.
1697                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
1698
1699                 $bytesleft = 0;
1700                 $result = "";
1701                 $working = 0;
1702                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1703                         $bytevalue = ord( $invalue{$i} );
1704                         if( $bytevalue <= 0x7F ) { //0xxx xxxx
1705                                 $result .= chr( $bytevalue );
1706                                 $bytesleft = 0;
1707                         } elseif( $bytevalue <= 0xBF ) { //10xx xxxx
1708                                 $working = $working << 6;
1709                                 $working += ($bytevalue & 0x3F);
1710                                 $bytesleft--;
1711                                 if( $bytesleft <= 0 ) {
1712                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
1713                                 }
1714                         } elseif( $bytevalue <= 0xDF ) { //110x xxxx
1715                                 $working = $bytevalue & 0x1F;
1716                                 $bytesleft = 1;
1717                         } elseif( $bytevalue <= 0xEF ) { //1110 xxxx
1718                                 $working = $bytevalue & 0x0F;
1719                                 $bytesleft = 2;
1720                         } else { //1111 0xxx
1721                                 $working = $bytevalue & 0x07;
1722                                 $bytesleft = 3;
1723                         }
1724                 }
1725                 return $result;
1726         }
1727
1728         /**
1729          * Reverse the previously applied transliteration of non-ASCII characters
1730          * back to UTF-8. Used to protect data from corruption by broken web browsers
1731          * as listed in $wgBrowserBlackList.
1732          *
1733          * @param string $invalue
1734          * @return string
1735          * @private
1736          */
1737         function unmakesafe( $invalue ) {
1738                 $result = "";
1739                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1740                         if( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
1741                                 $i += 3;
1742                                 $hexstring = "";
1743                                 do {
1744                                         $hexstring .= $invalue{$i};
1745                                         $i++;
1746                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
1747
1748                                 // Do some sanity checks. These aren't needed for reversability,
1749                                 // but should help keep the breakage down if the editor
1750                                 // breaks one of the entities whilst editing.
1751                                 if ((substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6)) {
1752                                         $codepoint = hexdec($hexstring);
1753                                         $result .= codepointToUtf8( $codepoint );
1754                                 } else {
1755                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
1756                                 }
1757                         } else {
1758                                 $result .= substr( $invalue, $i, 1 );
1759                         }
1760                 }
1761                 // reverse the transform that we made for reversability reasons.
1762                 return strtr( $result, array( "&#x0" => "&#x" ) );
1763         }
1764
1765         function noCreatePermission() {
1766                 global $wgOut;
1767                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
1768                 $wgOut->addWikiText( wfMsg( 'nocreatetext' ) );
1769         }
1770
1771 }
1772
1773 ?>