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                         $this->initialiseForm();
 307                         if( !$this->mTitle->getArticleId() )
 308                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 309                 }
 310
 311                 $this->showEditForm();
 312                 wfProfileOut( "$fname-business-end" );
 313                 wfProfileOut( $fname );
 314         }
 315
 316         /**
 317          * Return true if this page should be previewed when the edit form
 318          * is initially opened.
 319          * @return bool
 320          * @private
 321          */
 322         function previewOnOpen() {
 323                 global $wgUser;
 324                 return $this->section != 'new' &&
 325                         ( ( $wgUser->getOption( 'previewonfirst' ) && $this->mTitle->exists() ) ||
 326                                 ( $this->mTitle->getNamespace() == NS_CATEGORY &&
 327                                         !$this->mTitle->exists() ) );
 328         }
 329
 330         /**
 331          * @todo document
 332          * @param $request
 333          */
 334         function importFormData( &$request ) {
 335                 global $wgLang, $wgUser;
 336                 $fname = 'EditPage::importFormData';
 337                 wfProfileIn( $fname );
 338
 339                 if( $request->wasPosted() ) {
 340                         # These fields need to be checked for encoding.
 341                         # Also remove trailing whitespace, but don't remove _initial_
 342                         # whitespace from the text boxes. This may be significant formatting.
 343                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 344                         $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
 345                         $this->mMetaData = rtrim( $request->getText( 'metadata'   ) );
 346                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 347                         $this->summary   = $wgLang->truncate( $request->getText( 'wpSummary'  ), 250 );
 348
 349                         $this->edittime = $request->getVal( 'wpEdittime' );
 350                         $this->starttime = $request->getVal( 'wpStarttime' );
 351
 352                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 353
 354                         if( is_null( $this->edittime ) ) {
 355                                 # If the form is incomplete, force to preview.
 356                                 wfDebug( "$fname: Form data appears to be incomplete\n" );
 357                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 358                                 $this->preview  = true;
 359                         } else {
 360                                 /* Fallback for live preview */
 361                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 362                                 $this->diff = $request->getCheck( 'wpDiff' );
 363
 364                                 // Remember whether a save was requested, so we can indicate
 365                                 // if we forced preview due to session failure.
 366                                 $this->mTriedSave = !$this->preview;
 367
 368                                 if ( $this->tokenOk( $request ) ) {
 369                                         # Some browsers will not report any submit button
 370                                         # if the user hits enter in the comment box.
 371                                         # The unmarked state will be assumed to be a save,
 372                                         # if the form seems otherwise complete.
 373                                         wfDebug( "$fname: Passed token check.\n" );
 374                                 } else {
 375                                         # Page might be a hack attempt posted from
 376                                         # an external site. Preview instead of saving.
 377                                         wfDebug( "$fname: Failed token check; forcing preview\n" );
 378                                         $this->preview = true;
 379                                 }
 380                         }
 381                         $this->save    = ! ( $this->preview OR $this->diff );
 382                         if( !preg_match( '/^\d{14}$/', $this->edittime )) {
 383                                 $this->edittime = null;
 384                         }
 385
 386                         if( !preg_match( '/^\d{14}$/', $this->starttime )) {
 387                                 $this->starttime = null;
 388                         }
 389
 390                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 391
 392                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 393                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 394
 395                         # Don't force edit summaries when a user is editing their own user or talk page
 396                         if( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) && $this->mTitle->getText() == $wgUser->getName() ) {
 397                                 $this->allowBlankSummary = true;
 398                         } else {
 399                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' );
 400                         }
 401
 402                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 403                 } else {
 404                         # Not a posted form? Start with nothing.
 405                         wfDebug( "$fname: Not a posted form.\n" );
 406                         $this->textbox1  = '';
 407                         $this->textbox2  = '';
 408                         $this->mMetaData = '';
 409                         $this->summary   = '';
 410                         $this->edittime  = '';
 411                         $this->starttime = wfTimestampNow();
 412                         $this->preview   = false;
 413                         $this->save      = false;
 414                         $this->diff      = false;
 415                         $this->minoredit = false;
 416                         $this->watchthis = false;
 417                         $this->recreate  = false;
 418                 }
 419
 420                 $this->oldid = $request->getInt( 'oldid' );
 421
 422                 # Section edit can come from either the form or a link
 423                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 424
 425                 $this->live = $request->getCheck( 'live' );
 426                 $this->editintro = $request->getText( 'editintro' );
 427
 428                 wfProfileOut( $fname );
 429         }
 430
 431         /**
 432          * Make sure the form isn't faking a user's credentials.
 433          *
 434          * @param $request WebRequest
 435          * @return bool
 436          * @private
 437          */
 438         function tokenOk( &$request ) {
 439                 global $wgUser;
 440                 if( $wgUser->isAnon() ) {
 441                         # Anonymous users may not have a session
 442                         # open. Don't tokenize.
 443                         $this->mTokenOk = true;
 444                 } else {
 445                         $this->mTokenOk = $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
 446                 }
 447                 return $this->mTokenOk;
 448         }
 449
 450         /** */
 451         function showIntro() {
 452                 global $wgOut, $wgUser;
 453                 $addstandardintro=true;
 454                 if($this->editintro) {
 455                         $introtitle=Title::newFromText($this->editintro);
 456                         if(isset($introtitle) && $introtitle->userCanRead()) {
 457                                 $rev=Revision::newFromTitle($introtitle);
 458                                 if($rev) {
 459                                         $wgOut->addSecondaryWikiText($rev->getText());
 460                                         $addstandardintro=false;
 461                                 }
 462                         }
 463                 }
 464                 if($addstandardintro) {
 465                         if ( $wgUser->isLoggedIn() )
 466                                 $wgOut->addWikiText( wfMsg( 'newarticletext' ) );
 467                         else
 468                                 $wgOut->addWikiText( wfMsg( 'newarticletextanon' ) );
 469                 }
 470         }
 471
 472         /**
 473          * Attempt submission
 474          * @return bool false if output is done, true if the rest of the form should be displayed
 475          */
 476         function attemptSave() {
 477                 global $wgSpamRegex, $wgFilterCallback, $wgUser, $wgOut;
 478                 global $wgMaxArticleSize;
 479
 480                 $fname = 'EditPage::attemptSave';
 481                 wfProfileIn( $fname );
 482                 wfProfileIn( "$fname-checks" );
 483
 484                 # Reintegrate metadata
 485                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 486                 $this->mMetaData = '' ;
 487
 488                 # Check for spam
 489                 if ( $wgSpamRegex && preg_match( $wgSpamRegex, $this->textbox1, $matches ) ) {
 490                         $this->spamPage ( $matches[0] );
 491                         wfProfileOut( "$fname-checks" );
 492                         wfProfileOut( $fname );
 493                         return false;
 494                 }
 495                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section ) ) {
 496                         # Error messages or other handling should be performed by the filter function
 497                         wfProfileOut( $fname );
 498                         wfProfileOut( "$fname-checks" );
 499                         return false;
 500                 }
 501                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError ) ) ) {
 502                         # Error messages etc. could be handled within the hook...
 503                         wfProfileOut( $fname );
 504                         wfProfileOut( "$fname-checks" );
 505                         return false;
 506                 } elseif( $this->hookError != '' ) {
 507                         # ...or the hook could be expecting us to produce an error
 508                         wfProfileOut( "$fname-checks " );
 509                         wfProfileOut( $fname );
 510                         return true;
 511                 }
 512                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 513                         # Check block state against master, thus 'false'.
 514                         $this->blockedIPpage();
 515                         wfProfileOut( "$fname-checks" );
 516                         wfProfileOut( $fname );
 517                         return false;
 518                 }
 519                 $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 520                 if ( $this->kblength > $wgMaxArticleSize ) {
 521                         // Error will be displayed by showEditForm()
 522                         $this->tooBig = true;
 523                         wfProfileOut( "$fname-checks" );
 524                         wfProfileOut( $fname );
 525                         return true;
 526                 }
 527
 528                 if ( !$wgUser->isAllowed('edit') ) {
 529                         if ( $wgUser->isAnon() ) {
 530                                 $this->userNotLoggedInPage();
 531                                 wfProfileOut( "$fname-checks" );
 532                                 wfProfileOut( $fname );
 533                                 return false;
 534                         }
 535                         else {
 536                                 $wgOut->readOnlyPage();
 537                                 wfProfileOut( "$fname-checks" );
 538                                 wfProfileOut( $fname );
 539                                 return false;
 540                         }
 541                 }
 542
 543                 if ( wfReadOnly() ) {
 544                         $wgOut->readOnlyPage();
 545                         wfProfileOut( "$fname-checks" );
 546                         wfProfileOut( $fname );
 547                         return false;
 548                 }
 549                 if ( $wgUser->pingLimiter() ) {
 550                         $wgOut->rateLimited();
 551                         wfProfileOut( "$fname-checks" );
 552                         wfProfileOut( $fname );
 553                         return false;
 554                 }
 555
 556                 # If the article has been deleted while editing, don't save it without
 557                 # confirmation
 558                 if ( $this->deletedSinceEdit && !$this->recreate ) {
 559                         wfProfileOut( "$fname-checks" );
 560                         wfProfileOut( $fname );
 561                         return true;
 562                 }
 563
 564                 wfProfileOut( "$fname-checks" );
 565
 566                 # If article is new, insert it.
 567                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 568                 if ( 0 == $aid ) {
 569                         // Late check for create permission, just in case *PARANOIA*
 570                         if ( !$this->mTitle->userCan( 'create' ) ) {
 571                                 wfDebug( "$fname: no create permission\n" );
 572                                 $this->noCreatePermission();
 573                                 wfProfileOut( $fname );
 574                                 return;
 575                         }
 576
 577                         # Don't save a new article if it's blank.
 578                         if ( ( '' == $this->textbox1 ) ) {
 579                                         $wgOut->redirect( $this->mTitle->getFullURL() );
 580                                         wfProfileOut( $fname );
 581                                         return false;
 582                         }
 583
 584                         # If no edit comment was given when creating a new page, and what's being
 585                         # created is a redirect, be smart and fill in a neat auto-comment
 586                         if( $this->summary == '' ) {
 587                                 $rt = Title::newFromRedirect( $this->textbox1 );
 588                                 if( is_object( $rt ) )
 589                                         $this->summary = wfMsgForContent( 'autoredircomment', $rt->getPrefixedText() );
 590                         }
 591
 592                         $isComment=($this->section=='new');
 593                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 594                                 $this->minoredit, $this->watchthis, false, $isComment);
 595
 596                         wfProfileOut( $fname );
 597                         return false;
 598                 }
 599
 600                 # Article exists. Check for edit conflict.
 601
 602                 $this->mArticle->clear(); # Force reload of dates, etc.
 603                 $this->mArticle->forUpdate( true ); # Lock the article
 604
 605                 if( $this->mArticle->getTimestamp() != $this->edittime ) {
 606                         $this->isConflict = true;
 607                         if( $this->section == 'new' ) {
 608                                 if( $this->mArticle->getUserText() == $wgUser->getName() &&
 609                                         $this->mArticle->getComment() == $this->summary ) {
 610                                         // Probably a duplicate submission of a new comment.
 611                                         // This can happen when squid resends a request after
 612                                         // a timeout but the first one actually went through.
 613                                         wfDebug( "EditPage::editForm duplicate new section submission; trigger edit conflict!\n" );
 614                                 } else {
 615                                         // New comment; suppress conflict.
 616                                         $this->isConflict = false;
 617                                         wfDebug( "EditPage::editForm conflict suppressed; new section\n" );
 618                                 }
 619                         }
 620                 }
 621                 $userid = $wgUser->getID();
 622
 623                 if ( $this->isConflict) {
 624                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 625                                 $this->mArticle->getTimestamp() . "'\n" );
 626                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime);
 627                 }
 628                 else {
 629                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 630                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary);
 631                 }
 632                 if( is_null( $text ) ) {
 633                         wfDebug( "EditPage::editForm activating conflict; section replace failed.\n" );
 634                         $this->isConflict = true;
 635                         $text = $this->textbox1;
 636                 }
 637
 638                 # Suppress edit conflict with self, except for section edits where merging is required.
 639                 if ( ( $this->section == '' ) && ( 0 != $userid ) && ( $this->mArticle->getUser() == $userid ) ) {
 640                         wfDebug( "Suppressing edit conflict, same user.\n" );
 641                         $this->isConflict = false;
 642                 } else {
 643                         # switch from section editing to normal editing in edit conflict
 644                         if($this->isConflict) {
 645                                 # Attempt merge
 646                                 if( $this->mergeChangesInto( $text ) ){
 647                                         // Successful merge! Maybe we should tell the user the good news?
 648                                         $this->isConflict = false;
 649                                         wfDebug( "Suppressing edit conflict, successful merge.\n" );
 650                                 } else {
 651                                         $this->section = '';
 652                                         $this->textbox1 = $text;
 653                                         wfDebug( "Keeping edit conflict, failed merge.\n" );
 654                                 }
 655                         }
 656                 }
 657
 658                 if ( $this->isConflict ) {
 659                         wfProfileOut( $fname );
 660                         return true;
 661                 }
 662
 663                 # If no edit comment was given when turning a page into a redirect, be smart
 664                 # and fill in a neat auto-comment
 665                 if( $this->summary == '' ) {
 666                         $rt = Title::newFromRedirect( $this->textbox1 );
 667                         if( is_object( $rt ) )
 668                                 $this->summary = wfMsgForContent( 'autoredircomment', $rt->getPrefixedText() );
 669                 }
 670
 671                 # Handle the user preference to force summaries here
 672                 if( $this->section != 'new' && !$this->allowBlankSummary && $wgUser->getOption( 'forceeditsummary' ) ) {
 673                         if( md5( $this->summary ) == $this->autoSumm ) {
 674                                 $this->missingSummary = true;
 675                                 wfProfileOut( $fname );
 676                                 return( true );
 677                         }
 678                 }
 679
 680                 # All's well
 681                 wfProfileIn( "$fname-sectionanchor" );
 682                 $sectionanchor = '';
 683                 if( $this->section == 'new' ) {
 684                         if ( $this->textbox1 == '' ) {
 685                                 $this->missingComment = true;
 686                                 return true;
 687                         }
 688                         if( $this->summary != '' ) {
 689                                 $sectionanchor = $this->sectionAnchor( $this->summary );
 690                         }
 691                 } elseif( $this->section != '' ) {
 692                         # Try to get a section anchor from the section source, redirect to edited section if header found
 693                         # XXX: might be better to integrate this into Article::replaceSection
 694                         # for duplicate heading checking and maybe parsing
 695                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 696                         # we can't deal with anchors, includes, html etc in the header for now,
 697                         # headline would need to be parsed to improve this
 698                         if($hasmatch and strlen($matches[2]) > 0) {
 699                                 $sectionanchor = $this->sectionAnchor( $matches[2] );
 700                         }
 701                 }
 702                 wfProfileOut( "$fname-sectionanchor" );
 703
 704                 // Save errors may fall down to the edit form, but we've now
 705                 // merged the section into full text. Clear the section field
 706                 // so that later submission of conflict forms won't try to
 707                 // replace that into a duplicated mess.
 708                 $this->textbox1 = $text;
 709                 $this->section = '';
 710
 711                 // Check for length errors again now that the section is merged in
 712                 $this->kblength = (int)(strlen( $text ) / 1024);
 713                 if ( $this->kblength > $wgMaxArticleSize ) {
 714                         $this->tooBig = true;
 715                         wfProfileOut( $fname );
 716                         return true;
 717                 }
 718
 719                 # update the article here
 720                 if( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
 721                         $this->watchthis, '', $sectionanchor ) ) {
 722                         wfProfileOut( $fname );
 723                         return false;
 724                 } else {
 725                         $this->isConflict = true;
 726                 }
 727                 wfProfileOut( $fname );
 728                 return true;
 729         }
 730
 731         /**
 732          * Initialise form fields in the object
 733          * Called on the first invocation, e.g. when a user clicks an edit link
 734          */
 735         function initialiseForm() {
 736                 $this->edittime = $this->mArticle->getTimestamp();
 737                 $this->textbox1 = $this->mArticle->getContent();
 738                 $this->summary = '';
 739                 if ( !$this->mArticle->exists() && $this->mArticle->mTitle->getNamespace() == NS_MEDIAWIKI )
 740                         $this->textbox1 = wfMsgWeirdKey ( $this->mArticle->mTitle->getText() ) ;
 741                 wfProxyCheck();
 742         }
 743
 744         /**
 745          * Send the edit form and related headers to $wgOut
 746          * @param $formCallback Optional callable that takes an OutputPage
 747          *                      parameter; will be called during form output
 748          *                      near the top, for captchas and the like.
 749          */
 750         function showEditForm( $formCallback=null ) {
 751                 global $wgOut, $wgUser, $wgLang, $wgContLang, $wgMaxArticleSize;
 752
 753                 $fname = 'EditPage::showEditForm';
 754                 wfProfileIn( $fname );
 755
 756                 $sk =& $wgUser->getSkin();
 757
 758                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) ) ;
 759
 760                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 761
 762                 # Enabled article-related sidebar, toplinks, etc.
 763                 $wgOut->setArticleRelated( true );
 764
 765                 if ( $this->isConflict ) {
 766                         $s = wfMsg( 'editconflict', $this->mTitle->getPrefixedText() );
 767                         $wgOut->setPageTitle( $s );
 768                         $wgOut->addWikiText( wfMsg( 'explainconflict' ) );
 769
 770                         $this->textbox2 = $this->textbox1;
 771                         $this->textbox1 = $this->mArticle->getContent();
 772                         $this->edittime = $this->mArticle->getTimestamp();
 773                 } else {
 774
 775                         if( $this->section != '' ) {
 776                                 if( $this->section == 'new' ) {
 777                                         $s = wfMsg('editingcomment', $this->mTitle->getPrefixedText() );
 778                                 } else {
 779                                         $s = wfMsg('editingsection', $this->mTitle->getPrefixedText() );
 780                                         if( !$this->preview && !$this->diff ) {
 781                                                 preg_match( "/^(=+)(.+)\\1/mi",
 782                                                         $this->textbox1,
 783                                                         $matches );
 784                                                 if( !empty( $matches[2] ) ) {
 785                                                         $this->summary = "/* ". trim($matches[2])." */ ";
 786                                                 }
 787                                         }
 788                                 }
 789                         } else {
 790                                 $s = wfMsg( 'editing', $this->mTitle->getPrefixedText() );
 791                         }
 792                         $wgOut->setPageTitle( $s );
 793
 794                         if ( $this->missingComment ) {
 795                                 $wgOut->addWikiText( wfMsg( 'missingcommenttext' ) );
 796                         }
 797
 798                         if( $this->missingSummary ) {
 799                                 $wgOut->addWikiText( wfMsg( 'missingsummary' ) );
 800                         }
 801
 802                         if( !$this->hookError == '' ) {
 803                                 $wgOut->addWikiText( $this->hookError );
 804                         }
 805
 806                         if ( !$this->checkUnicodeCompliantBrowser() ) {
 807                                 $wgOut->addWikiText( wfMsg( 'nonunicodebrowser') );
 808                         }
 809                         if ( isset( $this->mArticle )
 810                              && isset( $this->mArticle->mRevision )
 811                              && !$this->mArticle->mRevision->isCurrent() ) {
 812                                 $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
 813                                 $wgOut->addWikiText( wfMsg( 'editingold' ) );
 814                         }
 815                 }
 816
 817                 $curUP = $wgUser->getUserPage();
 818                 $editingOTP = substr( $this->mTitle->getPrefixedText(), 0, strlen( $curUP->getPrefixedText() ) ) != $curUP->getPrefixedText()
 819                         && $this->formtype != 'preview'
 820                         && $this->formtype != 'diff';
 821                 if( $editingOTP ) {
 822                         $utpLink = $sk->makeKnownLinkObj( $this->mTitle->getTalkPage(), wfMsgHtml( 'editinguserpagetalklink' ), 'action=edit' );
 823                         $wgOut->addHtml( wfMsgWikiHtml( 'editinguserpage', $utpLink ) );
 824                 }
 825
 826                 if( wfReadOnly() ) {
 827                         $wgOut->addWikiText( wfMsg( 'readonlywarning' ) );
 828                 } elseif( $wgUser->isAnon() && $this->formtype != 'preview' ) {
 829                         $wgOut->addWikiText( wfMsg( 'anoneditwarning' ) );
 830                 } else {
 831                         if( $this->isCssJsSubpage && $this->formtype != 'preview' ) {
 832                                 # Check the skin exists
 833                                 if( $this->isValidCssJsSubpage ) {
 834                                         $wgOut->addWikiText( wfMsg( 'usercssjsyoucanpreview' ) );
 835                                 } else {
 836                                         $wgOut->addWikiText( wfMsg( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
 837                                 }
 838                         }
 839                 }
 840
 841                 if( $this->mTitle->isProtected( 'edit' ) ) {
 842                         # Is the protection due to the namespace, e.g. interface text?
 843                         if( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 844                                 # Yes; remind the user
 845                                 $notice = wfMsg( 'editinginterface' );
 846                         } elseif( $this->mTitle->isSemiProtected() ) {
 847                                 # No; semi protected
 848                                 $notice = wfMsg( 'semiprotectedpagewarning' );
 849                                 if( wfEmptyMsg( 'semiprotectedpagewarning', $notice ) || $notice == '-' ) {
 850                                         $notice = '';
 851                                 }
 852                         } else {
 853                                 # No; regular protection
 854                                 $notice = wfMsg( 'protectedpagewarning' );
 855                         }
 856                         $wgOut->addWikiText( $notice );
 857                 }
 858
 859                 if ( $this->kblength === false ) {
 860                         $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 861                 }
 862                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
 863                         $wgOut->addWikiText( wfMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgMaxArticleSize ) );
 864                 } elseif( $this->kblength > 29 ) {
 865                         $wgOut->addWikiText( wfMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) ) );
 866                 }
 867
 868                 $rows = $wgUser->getIntOption( 'rows' );
 869                 $cols = $wgUser->getIntOption( 'cols' );
 870
 871                 $ew = $wgUser->getOption( 'editwidth' );
 872                 if ( $ew ) $ew = " style=\"width:100%\"";
 873                 else $ew = '';
 874
 875                 $q = 'action=submit';
 876                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
 877                 $action = $this->mTitle->escapeLocalURL( $q );
 878
 879                 $summary = wfMsg('summary');
 880                 $subject = wfMsg('subject');
 881                 $minor   = wfMsgExt('minoredit', array('parseinline'));
 882                 $watchthis = wfMsgExt('watchthis', array('parseinline'));
 883
 884                 $cancel = $sk->makeKnownLink( $this->mTitle->getPrefixedText(),
 885                                 wfMsgExt('cancel', array('parseinline')) );
 886                 $edithelpurl = $sk->makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ));
 887                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
 888                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
 889                         htmlspecialchars( wfMsg( 'newwindow' ) );
 890
 891                 global $wgRightsText;
 892                 $copywarn = "<div id=\"editpage-copywarn\">\n" .
 893                         wfMsg( $wgRightsText ? 'copyrightwarning' : 'copyrightwarning2',
 894                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
 895                                 $wgRightsText ) . "\n</div>";
 896
 897                 if( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
 898                         # prepare toolbar for edit buttons
 899                         $toolbar = $this->getEditToolbar();
 900                 } else {
 901                         $toolbar = '';
 902                 }
 903
 904                 // activate checkboxes if user wants them to be always active
 905                 if( !$this->preview && !$this->diff ) {
 906                         # Sort out the "watch" checkbox
 907                         if( $wgUser->getOption( 'watchdefault' ) ) {
 908                                 # Watch all edits
 909                                 $this->watchthis = true;
 910                         } elseif( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 911                                 # Watch creations
 912                                 $this->watchthis = true;
 913                         } elseif( $this->mTitle->userIsWatching() ) {
 914                                 # Already watched
 915                                 $this->watchthis = true;
 916                         }
 917
 918                         if( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
 919                 }
 920
 921                 $minoredithtml = '';
 922
 923                 if ( $wgUser->isAllowed('minoredit') ) {
 924                         $minoredithtml =
 925                                 "<input tabindex='3' type='checkbox' value='1' name='wpMinoredit'".($this->minoredit?" checked='checked'":"").
 926                                 " accesskey='".wfMsg('accesskey-minoredit')."' id='wpMinoredit' />\n".
 927                                 "<label for='wpMinoredit' title='".wfMsg('tooltip-minoredit')."'>{$minor}</label>\n";
 928                 }
 929
 930                 $watchhtml = '';
 931
 932                 if ( $wgUser->isLoggedIn() ) {
 933                         $watchhtml = "<input tabindex='4' type='checkbox' name='wpWatchthis'".
 934                                 ($this->watchthis?" checked='checked'":"").
 935                                 " accesskey=\"".htmlspecialchars(wfMsg('accesskey-watch'))."\" id='wpWatchthis'  />\n".
 936                                 "<label for='wpWatchthis' title=\"" .
 937                                         htmlspecialchars(wfMsg('tooltip-watch'))."\">{$watchthis}</label>\n";
 938                 }
 939
 940                 $checkboxhtml = $minoredithtml . $watchhtml;
 941
 942                 if ( $wgUser->getOption( 'previewontop' ) ) {
 943
 944                         if ( 'preview' == $this->formtype ) {
 945                                 $this->showPreview();
 946                         } else {
 947                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
 948                         }
 949
 950                         if ( 'diff' == $this->formtype ) {
 951                                 $wgOut->addHTML( $this->getDiff() );
 952                         }
 953                 }
 954
 955
 956                 # if this is a comment, show a subject line at the top, which is also the edit summary.
 957                 # Otherwise, show a summary field at the bottom
 958                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
 959                 if( $this->section == 'new' ) {
 960                         $commentsubject="<span id='wpSummaryLabel'><label for='wpSummary'>{$subject}:</label></span>\n<div class='editOptions'>\n<input tabindex='1' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
 961                         $editsummary = '';
 962                 } else {
 963                         $commentsubject = '';
 964                         $editsummary="<span id='wpSummaryLabel'><label for='wpSummary'>{$summary}:</label></span>\n<div class='editOptions'>\n<input tabindex='2' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
 965                 }
 966
 967                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
 968                 if( !$this->preview && !$this->diff ) {
 969                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
 970                 }
 971                 $templates = $this->formatTemplates();
 972
 973                 global $wgUseMetadataEdit ;
 974                 if ( $wgUseMetadataEdit ) {
 975                         $metadata = $this->mMetaData ;
 976                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
 977                         $top = wfMsgWikiHtml( 'metadata_help' );
 978                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
 979                 }
 980                 else $metadata = "" ;
 981
 982                 $hidden = '';
 983                 $recreate = '';
 984                 if ($this->deletedSinceEdit) {
 985                         if ( 'save' != $this->formtype ) {
 986                                 $wgOut->addWikiText( wfMsg('deletedwhileediting'));
 987                         } else {
 988                                 // Hide the toolbar and edit area, use can click preview to get it back
 989                                 // Add an confirmation checkbox and explanation.
 990                                 $toolbar = '';
 991                                 $hidden = 'type="hidden" style="display:none;"';
 992                                 $recreate = $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ));
 993                                 $recreate .=
 994                                         "<br /><input tabindex='1' type='checkbox' value='1' name='wpRecreate' id='wpRecreate' />".
 995                                         "<label for='wpRecreate' title='".wfMsg('tooltip-recreate')."'>". wfMsg('recreate')."</label>";
 996                         }
 997                 }
 998
 999                 $temp = array(
1000                         'id'        => 'wpSave',
1001                         'name'      => 'wpSave',
1002                         'type'      => 'submit',
1003                         'tabindex'  => '5',
1004                         'value'     => wfMsg('savearticle'),
1005                         'accesskey' => wfMsg('accesskey-save'),
1006                         'title'     => wfMsg('tooltip-save'),
1007                 );
1008                 $buttons['save'] = wfElement('input', $temp, '');
1009                 $temp = array(
1010                         'id'        => 'wpDiff',
1011                         'name'      => 'wpDiff',
1012                         'type'      => 'submit',
1013                         'tabindex'  => '7',
1014                         'value'     => wfMsg('showdiff'),
1015                         'accesskey' => wfMsg('accesskey-diff'),
1016                         'title'     => wfMsg('tooltip-diff'),
1017                 );
1018                 $buttons['diff'] = wfElement('input', $temp, '');
1019
1020                 global $wgLivePreview;
1021                 if ( $wgLivePreview && $wgUser->getOption( 'uselivepreview' ) ) {
1022                         $temp = array(
1023                                 'id'        => 'wpPreview',
1024                                 'name'      => 'wpPreview',
1025                                 'type'      => 'submit',
1026                                 'tabindex'  => '6',
1027                                 'value'     => wfMsg('showpreview'),
1028                                 'accesskey' => '',
1029                                 'title'     => wfMsg('tooltip-preview'),
1030                                 'style'     => 'display: none;',
1031                         );
1032                         $buttons['preview'] = wfElement('input', $temp, '');
1033                         $temp = array(
1034                                 'id'        => 'wpLivePreview',
1035                                 'name'      => 'wpLivePreview',
1036                                 'type'      => 'submit',
1037                                 'tabindex'  => '6',
1038                                 'value'     => wfMsg('showlivepreview'),
1039                                 'accesskey' => wfMsg('accesskey-preview'),
1040                                 'title'     => '',
1041                                 'onclick'   => $this->doLivePreviewScript(),
1042                         );
1043                         $buttons['live'] = wfElement('input', $temp, '');
1044                 } else {
1045                         $temp = array(
1046                                 'id'        => 'wpPreview',
1047                                 'name'      => 'wpPreview',
1048                                 'type'      => 'submit',
1049                                 'tabindex'  => '6',
1050                                 'value'     => wfMsg('showpreview'),
1051                                 'accesskey' => wfMsg('accesskey-preview'),
1052                                 'title'     => wfMsg('tooltip-preview'),
1053                         );
1054                         $buttons['preview'] = wfElement('input', $temp, '');
1055                         $buttons['live'] = '';
1056                 }
1057
1058                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
1059                         ? ""
1060                         : "<input type='hidden' name=\"safemode\" value='1' />\n";
1061
1062                 $wgOut->addHTML( <<<END
1063 {$toolbar}
1064 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1065 END
1066 );
1067
1068                 if( is_callable( $formCallback ) ) {
1069                         call_user_func_array( $formCallback, array( &$wgOut ) );
1070                 }
1071
1072                 // Put these up at the top to ensure they aren't lost on early form submission
1073                 $wgOut->addHTML( "
1074 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
1075 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
1076 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
1077 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
1078
1079                 $wgOut->addHTML( <<<END
1080 $recreate
1081 {$commentsubject}
1082 <textarea tabindex='1' accesskey="," name="wpTextbox1" id="wpTextbox1" rows='{$rows}'
1083 cols='{$cols}'{$ew} $hidden>
1084 END
1085 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox1 ) ) .
1086 "
1087 </textarea>
1088                 " );
1089
1090                 $wgOut->addWikiText( $copywarn );
1091                 $wgOut->addHTML( "
1092 {$metadata}
1093 {$editsummary}
1094 {$checkboxhtml}
1095 {$safemodehtml}
1096 ");
1097
1098                 $wgOut->addHTML(
1099 "<div class='editButtons'>
1100         {$buttons['save']}
1101         {$buttons['preview']}
1102         {$buttons['live']}
1103         {$buttons['diff']}
1104         <span class='editHelp'>{$cancel} | {$edithelp}</span>
1105 </div><!-- editButtons -->
1106 </div><!-- editOptions -->");
1107
1108                 $wgOut->addWikiText( wfMsgForContent( 'edittools' ) );
1109
1110                 $wgOut->addHTML( "
1111 <div class='templatesUsed'>
1112 {$templates}
1113 </div>
1114 " );
1115
1116                 if ( $wgUser->isLoggedIn() ) {
1117                         /**
1118                          * To make it harder for someone to slip a user a page
1119                          * which submits an edit form to the wiki without their
1120                          * knowledge, a random token is associated with the login
1121                          * session. If it's not passed back with the submission,
1122                          * we won't save the page, or render user JavaScript and
1123                          * CSS previews.
1124                          */
1125                         $token = htmlspecialchars( $wgUser->editToken() );
1126                         $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
1127                 }
1128
1129                 # If a blank edit summary was previously provided, and the appropriate
1130                 # user preference is active, pass a hidden tag here. This will stop the
1131                 # user being bounced back more than once in the event that a summary
1132                 # is not required.
1133                 if( $this->missingSummary ) {
1134                         $wgOut->addHTML( "<input type=\"hidden\" name=\"wpIgnoreBlankSummary\" value=\"1\" />\n" );
1135                 }
1136
1137                 # For a bit more sophisticated detection of blank summaries, hash the
1138                 # automatic one and pass that in a hidden field.
1139                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1140                 $wgOut->addHtml( wfHidden( 'wpAutoSummary', $autosumm ) );
1141
1142                 if ( $this->isConflict ) {
1143                         require_once( "DifferenceEngine.php" );
1144                         $wgOut->addWikiText( '==' . wfMsg( "yourdiff" ) . '==' );
1145
1146                         $de = new DifferenceEngine( $this->mTitle );
1147                         $de->setText( $this->textbox2, $this->textbox1 );
1148                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1149
1150                         $wgOut->addWikiText( '==' . wfMsg( "yourtext" ) . '==' );
1151                         $wgOut->addHTML( "<textarea tabindex=6 id='wpTextbox2' name=\"wpTextbox2\" rows='{$rows}' cols='{$cols}' wrap='virtual'>"
1152                                 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox2 ) ) . "\n</textarea>" );
1153                 }
1154                 $wgOut->addHTML( "</form>\n" );
1155                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1156
1157                         if ( $this->formtype == 'preview') {
1158                                 $this->showPreview();
1159                         } else {
1160                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
1161                         }
1162
1163                         if ( $this->formtype == 'diff') {
1164                                 $wgOut->addHTML( $this->getDiff() );
1165                         }
1166
1167                 }
1168
1169                 wfProfileOut( $fname );
1170         }
1171
1172         /**
1173          * Append preview output to $wgOut.
1174          * Includes category rendering if this is a category page.
1175          * @private
1176          */
1177         function showPreview() {
1178                 global $wgOut;
1179                 $wgOut->addHTML( '<div id="wikiPreview">' );
1180                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1181                         $this->mArticle->openShowCategory();
1182                 }
1183                 $previewOutput = $this->getPreviewText();
1184                 $wgOut->addHTML( $previewOutput );
1185                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1186                         $this->mArticle->closeShowCategory();
1187                 }
1188                 $wgOut->addHTML( "<br style=\"clear:both;\" />\n" );
1189                 $wgOut->addHTML( '</div>' );
1190         }
1191
1192         /**
1193          * Prepare a list of templates used by this page. Returns HTML.
1194          */
1195         function formatTemplates() {
1196                 global $wgUser;
1197
1198                 $fname = 'EditPage::formatTemplates';
1199                 wfProfileIn( $fname );
1200
1201                 $sk =& $wgUser->getSkin();
1202
1203                 $outText = '';
1204                 $templates = $this->mArticle->getUsedTemplates();
1205                 if ( count( $templates ) > 0 ) {
1206                         # Do a batch existence check
1207                         $batch = new LinkBatch;
1208                         foreach( $templates as $title ) {
1209                                 $batch->addObj( $title );
1210                         }
1211                         $batch->execute();
1212
1213                         # Construct the HTML
1214                         $outText = '<br />'. wfMsgExt( 'templatesused', array( 'parseinline' ) ) . '<ul>';
1215                         foreach ( $templates as $titleObj ) {
1216                                 $outText .= '<li>' . $sk->makeLinkObj( $titleObj ) . '</li>';
1217                         }
1218                         $outText .= '</ul>';
1219                 }
1220                 wfProfileOut( $fname );
1221                 return $outText;
1222         }
1223
1224         /**
1225          * Live Preview lets us fetch rendered preview page content and
1226          * add it to the page without refreshing the whole page.
1227          * If not supported by the browser it will fall through to the normal form
1228          * submission method.
1229          *
1230          * This function outputs a script tag to support live preview, and
1231          * returns an onclick handler which should be added to the attributes
1232          * of the preview button
1233          */
1234         function doLivePreviewScript() {
1235                 global $wgStylePath, $wgJsMimeType, $wgOut, $wgTitle;
1236                 $wgOut->addHTML( '<script type="'.$wgJsMimeType.'" src="' .
1237                         htmlspecialchars( $wgStylePath . '/common/preview.js' ) .
1238                         '"></script>' . "\n" );
1239                 $liveAction = $wgTitle->getLocalUrl( 'action=submit&wpPreview=true&live=true' );
1240                 return "return !livePreview(" .
1241                         "getElementById('wikiPreview')," .
1242                         "editform.wpTextbox1.value," .
1243                         '"' . $liveAction . '"' . ")";
1244         }
1245
1246         function getLastDelete() {
1247                 $dbr =& wfGetDB( DB_SLAVE );
1248                 $fname = 'EditPage::getLastDelete';
1249                 $res = $dbr->select(
1250                         array( 'logging', 'user' ),
1251                         array( 'log_type',
1252                                'log_action',
1253                                'log_timestamp',
1254                                'log_user',
1255                                'log_namespace',
1256                                'log_title',
1257                                'log_comment',
1258                                'log_params',
1259                                'user_name', ),
1260                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1261                                'log_title' => $this->mTitle->getDBkey(),
1262                                'log_type' => 'delete',
1263                                'log_action' => 'delete',
1264                                'user_id=log_user' ),
1265                         $fname,
1266                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
1267
1268                 if($dbr->numRows($res) == 1) {
1269                         while ( $x = $dbr->fetchObject ( $res ) )
1270                                 $data = $x;
1271                         $dbr->freeResult ( $res ) ;
1272                 } else {
1273                         $data = null;
1274                 }
1275                 return $data;
1276         }
1277
1278         /**
1279          * @todo document
1280          */
1281         function getPreviewText() {
1282                 global $wgOut, $wgUser, $wgTitle, $wgParser;
1283
1284                 $fname = 'EditPage::getPreviewText';
1285                 wfProfileIn( $fname );
1286
1287                 if ( $this->mTriedSave && !$this->mTokenOk ) {
1288                         $msg = 'session_fail_preview';
1289                 } else {
1290                         $msg = 'previewnote';
1291                 }
1292                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
1293                         "<div class='previewnote'>" . $wgOut->parse( wfMsg( $msg ) ) . "</div>\n";
1294                 if ( $this->isConflict ) {
1295                         $previewhead.='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1296                 }
1297
1298                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1299                 $parserOptions->setEditSection( false );
1300
1301                 global $wgRawHtml;
1302                 if( $wgRawHtml && !$this->mTokenOk ) {
1303                         // Could be an offsite preview attempt. This is very unsafe if
1304                         // HTML is enabled, as it could be an attack.
1305                         return $wgOut->parse( "<div class='previewnote'>" .
1306                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1307                 }
1308
1309                 # don't parse user css/js, show message about preview
1310                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1311
1312                 if ( $this->isCssJsSubpage ) {
1313                         if(preg_match("/\\.css$/", $wgTitle->getText() ) ) {
1314                                 $previewtext = wfMsg('usercsspreview');
1315                         } else if(preg_match("/\\.js$/", $wgTitle->getText() ) ) {
1316                                 $previewtext = wfMsg('userjspreview');
1317                         }
1318                         $parserOptions->setTidy(true);
1319                         $parserOutput = $wgParser->parse( $previewtext , $wgTitle, $parserOptions );
1320                         $wgOut->addHTML( $parserOutput->mText );
1321                         wfProfileOut( $fname );
1322                         return $previewhead;
1323                 } else {
1324                         # if user want to see preview when he edit an article
1325                         if( $wgUser->getOption('previewonfirst') and ($this->textbox1 == '')) {
1326                                 $this->textbox1 = $this->mArticle->getContent();
1327                         }
1328
1329                         $toparse = $this->textbox1;
1330
1331                         # If we're adding a comment, we need to show the
1332                         # summary as the headline
1333                         if($this->section=="new" && $this->summary!="") {
1334                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1335                         }
1336
1337                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData ;
1338                         $parserOptions->setTidy(true);
1339                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ) ."\n\n",
1340                                         $wgTitle, $parserOptions );
1341
1342                         $previewHTML = $parserOutput->getText();
1343                         $wgOut->addParserOutputNoText( $parserOutput );
1344
1345                         wfProfileOut( $fname );
1346                         return $previewhead . $previewHTML;
1347                 }
1348         }
1349
1350         /**
1351          * Call the stock "user is blocked" page
1352          */
1353         function blockedIPpage() {
1354                 global $wgOut;
1355                 $wgOut->blockedPage();
1356         }
1357
1358         /**
1359          * Produce the stock "please login to edit pages" page
1360          */
1361         function userNotLoggedInPage() {
1362                 global $wgUser, $wgOut;
1363                 $skin = $wgUser->getSkin();
1364
1365                 $loginTitle = Title::makeTitle( NS_SPECIAL, 'Userlogin' );
1366                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $this->mTitle->getPrefixedUrl() );
1367
1368                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1369                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1370                 $wgOut->setArticleRelated( false );
1371
1372                 $wgOut->addHtml( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
1373                 $wgOut->returnToMain( false, $this->mTitle->getPrefixedUrl() );
1374         }
1375
1376         /**
1377          * Creates a basic error page which informs the user that
1378          * they have to validate their email address before being
1379          * allowed to edit.
1380          */
1381         function userNotConfirmedPage() {
1382                 global $wgOut;
1383
1384                 $wgOut->setPageTitle( wfMsg( 'confirmedittitle' ) );
1385                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1386                 $wgOut->setArticleRelated( false );
1387
1388                 $wgOut->addWikiText( wfMsg( 'confirmedittext' ) );
1389                 $wgOut->returnToMain( false );
1390         }
1391
1392         /**
1393          * Produce the stock "your edit contains spam" page
1394          *
1395          * @param $match Text which triggered one or more filters
1396          */
1397         function spamPage( $match = false ) {
1398                 global $wgOut;
1399
1400                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1401                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1402                 $wgOut->setArticleRelated( false );
1403
1404                 $wgOut->addWikiText( wfMsg( 'spamprotectiontext' ) );
1405                 if ( $match )
1406                         $wgOut->addWikiText( wfMsg( 'spamprotectionmatch', "<nowiki>{$match}</nowiki>" ) );
1407
1408                 $wgOut->returnToMain( false );
1409         }
1410
1411         /**
1412          * @private
1413          * @todo document
1414          */
1415         function mergeChangesInto( &$editText ){
1416                 $fname = 'EditPage::mergeChangesInto';
1417                 wfProfileIn( $fname );
1418
1419                 $db =& wfGetDB( DB_MASTER );
1420
1421                 // This is the revision the editor started from
1422                 $baseRevision = Revision::loadFromTimestamp(
1423                         $db, $this->mArticle->mTitle, $this->edittime );
1424                 if( is_null( $baseRevision ) ) {
1425                         wfProfileOut( $fname );
1426                         return false;
1427                 }
1428                 $baseText = $baseRevision->getText();
1429
1430                 // The current state, we want to merge updates into it
1431                 $currentRevision =  Revision::loadFromTitle(
1432                         $db, $this->mArticle->mTitle );
1433                 if( is_null( $currentRevision ) ) {
1434                         wfProfileOut( $fname );
1435                         return false;
1436                 }
1437                 $currentText = $currentRevision->getText();
1438
1439                 if( wfMerge( $baseText, $editText, $currentText, $result ) ){
1440                         $editText = $result;
1441                         wfProfileOut( $fname );
1442                         return true;
1443                 } else {
1444                         wfProfileOut( $fname );
1445                         return false;
1446                 }
1447         }
1448
1449         /**
1450          * Check if the browser is on a blacklist of user-agents known to
1451          * mangle UTF-8 data on form submission. Returns true if Unicode
1452          * should make it through, false if it's known to be a problem.
1453          * @return bool
1454          * @private
1455          */
1456         function checkUnicodeCompliantBrowser() {
1457                 global $wgBrowserBlackList;
1458                 if( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
1459                         // No User-Agent header sent? Trust it by default...
1460                         return true;
1461                 }
1462                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1463                 foreach ( $wgBrowserBlackList as $browser ) {
1464                         if ( preg_match($browser, $currentbrowser) ) {
1465                                 return false;
1466                         }
1467                 }
1468                 return true;
1469         }
1470
1471         /**
1472          * Format an anchor fragment as it would appear for a given section name
1473          * @param string $text
1474          * @return string
1475          * @private
1476          */
1477         function sectionAnchor( $text ) {
1478                 $headline = Sanitizer::decodeCharReferences( $text );
1479                 # strip out HTML
1480                 $headline = preg_replace( '/<.*?' . '>/', '', $headline );
1481                 $headline = trim( $headline );
1482                 $sectionanchor = '#' . urlencode( str_replace( ' ', '_', $headline ) );
1483                 $replacearray = array(
1484                         '%3A' => ':',
1485                         '%' => '.'
1486                 );
1487                 return str_replace(
1488                         array_keys( $replacearray ),
1489                         array_values( $replacearray ),
1490                         $sectionanchor );
1491         }
1492
1493         /**
1494          * Shows a bulletin board style toolbar for common editing functions.
1495          * It can be disabled in the user preferences.
1496          * The necessary JavaScript code can be found in style/wikibits.js.
1497          */
1498         function getEditToolbar() {
1499                 global $wgStylePath, $wgContLang, $wgJsMimeType;
1500
1501                 /**
1502                  * toolarray an array of arrays which each include the filename of
1503                  * the button image (without path), the opening tag, the closing tag,
1504                  * and optionally a sample text that is inserted between the two when no
1505                  * selection is highlighted.
1506                  * The tip text is shown when the user moves the mouse over the button.
1507                  *
1508                  * Already here are accesskeys (key), which are not used yet until someone
1509                  * can figure out a way to make them work in IE. However, we should make
1510                  * sure these keys are not defined on the edit page.
1511                  */
1512                 $toolarray=array(
1513                         array(  'image'=>'button_bold.png',
1514                                         'open'  =>      "\'\'\'",
1515                                         'close' =>      "\'\'\'",
1516                                         'sample'=>      wfMsg('bold_sample'),
1517                                         'tip'   =>      wfMsg('bold_tip'),
1518                                         'key'   =>      'B'
1519                                 ),
1520                         array(  'image'=>'button_italic.png',
1521                                         'open'  =>      "\'\'",
1522                                         'close' =>      "\'\'",
1523                                         'sample'=>      wfMsg('italic_sample'),
1524                                         'tip'   =>      wfMsg('italic_tip'),
1525                                         'key'   =>      'I'
1526                                 ),
1527                         array(  'image'=>'button_link.png',
1528                                         'open'  =>      '[[',
1529                                         'close' =>      ']]',
1530                                         'sample'=>      wfMsg('link_sample'),
1531                                         'tip'   =>      wfMsg('link_tip'),
1532                                         'key'   =>      'L'
1533                                 ),
1534                         array(  'image'=>'button_extlink.png',
1535                                         'open'  =>      '[',
1536                                         'close' =>      ']',
1537                                         'sample'=>      wfMsg('extlink_sample'),
1538                                         'tip'   =>      wfMsg('extlink_tip'),
1539                                         'key'   =>      'X'
1540                                 ),
1541                         array(  'image'=>'button_headline.png',
1542                                         'open'  =>      "\\n== ",
1543                                         'close' =>      " ==\\n",
1544                                         'sample'=>      wfMsg('headline_sample'),
1545                                         'tip'   =>      wfMsg('headline_tip'),
1546                                         'key'   =>      'H'
1547                                 ),
1548                         array(  'image'=>'button_image.png',
1549                                         'open'  =>      '[['.$wgContLang->getNsText(NS_IMAGE).":",
1550                                         'close' =>      ']]',
1551                                         'sample'=>      wfMsg('image_sample'),
1552                                         'tip'   =>      wfMsg('image_tip'),
1553                                         'key'   =>      'D'
1554                                 ),
1555                         array(  'image' =>'button_media.png',
1556                                         'open'  =>      '[['.$wgContLang->getNsText(NS_MEDIA).':',
1557                                         'close' =>      ']]',
1558                                         'sample'=>      wfMsg('media_sample'),
1559                                         'tip'   =>      wfMsg('media_tip'),
1560                                         'key'   =>      'M'
1561                                 ),
1562                         array(  'image' =>'button_math.png',
1563                                         'open'  =>      "<math>",
1564                                         'close' =>      "<\\/math>",
1565                                         'sample'=>      wfMsg('math_sample'),
1566                                         'tip'   =>      wfMsg('math_tip'),
1567                                         'key'   =>      'C'
1568                                 ),
1569                         array(  'image' =>'button_nowiki.png',
1570                                         'open'  =>      "<nowiki>",
1571                                         'close' =>      "<\\/nowiki>",
1572                                         'sample'=>      wfMsg('nowiki_sample'),
1573                                         'tip'   =>      wfMsg('nowiki_tip'),
1574                                         'key'   =>      'N'
1575                                 ),
1576                         array(  'image' =>'button_sig.png',
1577                                         'open'  =>      '--~~~~',
1578                                         'close' =>      '',
1579                                         'sample'=>      '',
1580                                         'tip'   =>      wfMsg('sig_tip'),
1581                                         'key'   =>      'Y'
1582                                 ),
1583                         array(  'image' =>'button_hr.png',
1584                                         'open'  =>      "\\n----\\n",
1585                                         'close' =>      '',
1586                                         'sample'=>      '',
1587                                         'tip'   =>      wfMsg('hr_tip'),
1588                                         'key'   =>      'R'
1589                                 )
1590                 );
1591                 $toolbar = "<div id='toolbar'>\n";
1592                 $toolbar.="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
1593
1594                 foreach($toolarray as $tool) {
1595
1596                         $image=$wgStylePath.'/common/images/'.$tool['image'];
1597                         $open=$tool['open'];
1598                         $close=$tool['close'];
1599                         $sample = wfEscapeJsString( $tool['sample'] );
1600
1601                         // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
1602                         // Older browsers show a "speedtip" type message only for ALT.
1603                         // Ideally these should be different, realistically they
1604                         // probably don't need to be.
1605                         $tip = wfEscapeJsString( $tool['tip'] );
1606
1607                         #$key = $tool["key"];
1608
1609                         $toolbar.="addButton('$image','$tip','$open','$close','$sample');\n";
1610                 }
1611
1612                 $toolbar.="/*]]>*/\n</script>";
1613                 $toolbar.="\n</div>";
1614                 return $toolbar;
1615         }
1616
1617         /**
1618          * Output preview text only. This can be sucked into the edit page
1619          * via JavaScript, and saves the server time rendering the skin as
1620          * well as theoretically being more robust on the client (doesn't
1621          * disturb the edit box's undo history, won't eat your text on
1622          * failure, etc).
1623          *
1624          * @todo This doesn't include category or interlanguage links.
1625          *       Would need to enhance it a bit, maybe wrap them in XML
1626          *       or something... that might also require more skin
1627          *       initialization, so check whether that's a problem.
1628          */
1629         function livePreview() {
1630                 global $wgOut;
1631                 $wgOut->disable();
1632                 header( 'Content-type: text/xml' );
1633                 header( 'Cache-control: no-cache' );
1634                 # FIXME
1635                 echo $this->getPreviewText( );
1636                 /* To not shake screen up and down between preview and live-preview */
1637                 echo "<br style=\"clear:both;\" />\n";
1638         }
1639
1640
1641         /**
1642          * Get a diff between the current contents of the edit box and the
1643          * version of the page we're editing from.
1644          *
1645          * If this is a section edit, we'll replace the section as for final
1646          * save and then make a comparison.
1647          *
1648          * @return string HTML
1649          */
1650         function getDiff() {
1651                 require_once( 'DifferenceEngine.php' );
1652                 $oldtext = $this->mArticle->fetchContent();
1653                 $newtext = $this->mArticle->replaceSection(
1654                         $this->section, $this->textbox1, $this->summary, $this->edittime );
1655                 $newtext = $this->mArticle->preSaveTransform( $newtext );
1656                 $oldtitle = wfMsgExt( 'currentrev', array('parseinline') );
1657                 $newtitle = wfMsgExt( 'yourtext', array('parseinline') );
1658                 if ( $oldtext !== false  || $newtext != '' ) {
1659                         $de = new DifferenceEngine( $this->mTitle );
1660                         $de->setText( $oldtext, $newtext );
1661                         $difftext = $de->getDiff( $oldtitle, $newtitle );
1662                 } else {
1663                         $difftext = '';
1664                 }
1665
1666                 return '<div id="wikiDiff">' . $difftext . '</div>';
1667         }
1668
1669         /**
1670          * Filter an input field through a Unicode de-armoring process if it
1671          * came from an old browser with known broken Unicode editing issues.
1672          *
1673          * @param WebRequest $request
1674          * @param string $field
1675          * @return string
1676          * @private
1677          */
1678         function safeUnicodeInput( $request, $field ) {
1679                 $text = rtrim( $request->getText( $field ) );
1680                 return $request->getBool( 'safemode' )
1681                         ? $this->unmakesafe( $text )
1682                         : $text;
1683         }
1684
1685         /**
1686          * Filter an output field through a Unicode armoring process if it is
1687          * going to an old browser with known broken Unicode editing issues.
1688          *
1689          * @param string $text
1690          * @return string
1691          * @private
1692          */
1693         function safeUnicodeOutput( $text ) {
1694                 global $wgContLang;
1695                 $codedText = $wgContLang->recodeForEdit( $text );
1696                 return $this->checkUnicodeCompliantBrowser()
1697                         ? $codedText
1698                         : $this->makesafe( $codedText );
1699         }
1700
1701         /**
1702          * A number of web browsers are known to corrupt non-ASCII characters
1703          * in a UTF-8 text editing environment. To protect against this,
1704          * detected browsers will be served an armored version of the text,
1705          * with non-ASCII chars converted to numeric HTML character references.
1706          *
1707          * Preexisting such character references will have a 0 added to them
1708          * to ensure that round-trips do not alter the original data.
1709          *
1710          * @param string $invalue
1711          * @return string
1712          * @private
1713          */
1714         function makesafe( $invalue ) {
1715                 // Armor existing references for reversability.
1716                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
1717
1718                 $bytesleft = 0;
1719                 $result = "";
1720                 $working = 0;
1721                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1722                         $bytevalue = ord( $invalue{$i} );
1723                         if( $bytevalue <= 0x7F ) { //0xxx xxxx
1724                                 $result .= chr( $bytevalue );
1725                                 $bytesleft = 0;
1726                         } elseif( $bytevalue <= 0xBF ) { //10xx xxxx
1727                                 $working = $working << 6;
1728                                 $working += ($bytevalue & 0x3F);
1729                                 $bytesleft--;
1730                                 if( $bytesleft <= 0 ) {
1731                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
1732                                 }
1733                         } elseif( $bytevalue <= 0xDF ) { //110x xxxx
1734                                 $working = $bytevalue & 0x1F;
1735                                 $bytesleft = 1;
1736                         } elseif( $bytevalue <= 0xEF ) { //1110 xxxx
1737                                 $working = $bytevalue & 0x0F;
1738                                 $bytesleft = 2;
1739                         } else { //1111 0xxx
1740                                 $working = $bytevalue & 0x07;
1741                                 $bytesleft = 3;
1742                         }
1743                 }
1744                 return $result;
1745         }
1746
1747         /**
1748          * Reverse the previously applied transliteration of non-ASCII characters
1749          * back to UTF-8. Used to protect data from corruption by broken web browsers
1750          * as listed in $wgBrowserBlackList.
1751          *
1752          * @param string $invalue
1753          * @return string
1754          * @private
1755          */
1756         function unmakesafe( $invalue ) {
1757                 $result = "";
1758                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1759                         if( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
1760                                 $i += 3;
1761                                 $hexstring = "";
1762                                 do {
1763                                         $hexstring .= $invalue{$i};
1764                                         $i++;
1765                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
1766
1767                                 // Do some sanity checks. These aren't needed for reversability,
1768                                 // but should help keep the breakage down if the editor
1769                                 // breaks one of the entities whilst editing.
1770                                 if ((substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6)) {
1771                                         $codepoint = hexdec($hexstring);
1772                                         $result .= codepointToUtf8( $codepoint );
1773                                 } else {
1774                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
1775                                 }
1776                         } else {
1777                                 $result .= substr( $invalue, $i, 1 );
1778                         }
1779                 }
1780                 // reverse the transform that we made for reversability reasons.
1781                 return strtr( $result, array( "&#x0" => "&#x" ) );
1782         }
1783
1784         function noCreatePermission() {
1785                 global $wgOut;
1786                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
1787                 $wgOut->addWikiText( wfMsg( 'nocreatetext' ) );
1788         }
1789
1790 }
1791
1792 ?>