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          * Fetch initial editing page content.
  55          */
  56         private function getContent() {
  57                 global $wgRequest, $wgParser;
  58
  59                 # Get variables from query string :P
  60                 $section = $wgRequest->getVal( 'section' );
  61                 $preload = $wgRequest->getVal( 'preload' );
  62
  63                 wfProfileIn( __METHOD__ );
  64
  65                 $text = '';
  66                 if( !$this->mTitle->exists() ) {
  67
  68                         # If requested, preload some text.
  69                         $text = $this->getPreloadedText( $preload );
  70
  71                         # We used to put MediaWiki:Newarticletext here if
  72                         # $text was empty at this point.
  73                         # This is now shown above the edit box instead.
  74                 } else {
  75                         // FIXME: may be better to use Revision class directly
  76                         // But don't mess with it just yet. Article knows how to
  77                         // fetch the page record from the high-priority server,
  78                         // which is needed to guarantee we don't pick up lagged
  79                         // information.
  80
  81                         $text = $this->mArticle->getContent();
  82
  83                         if( $section != '' ) {
  84                                 if( $section == 'new' ) {
  85                                         $text = $this->getPreloadedText( $preload );
  86                                 } else {
  87                                         $text = $wgParser->getSection( $text, $section );
  88                                 }
  89                         }
  90                 }
  91
  92                 wfProfileOut( __METHOD__ );
  93                 return $text;
  94         }
  95
  96         /**
  97          * Get the contents of a page from its title and remove includeonly tags
  98          *
  99          * @param $preload String: the title of the page.
 100          * @return string The contents of the page.
 101          */
 102         private function getPreloadedText($preload) {
 103                 if ( $preload === '' )
 104                         return '';
 105                 else {
 106                         $preloadTitle = Title::newFromText( $preload );
 107                         if ( isset( $preloadTitle ) && $preloadTitle->userCanRead() ) {
 108                                 $rev=Revision::newFromTitle($preloadTitle);
 109                                 if ( is_object( $rev ) ) {
 110                                         $text = $rev->getText();
 111                                         // TODO FIXME: AAAAAAAAAAA, this shouldn't be implementing
 112                                         // its own mini-parser! -ævar
 113                                         $text = preg_replace( '~</?includeonly>~', '', $text );
 114                                         return $text;
 115                                 } else
 116                                         return '';
 117                         }
 118                 }
 119         }
 120
 121         /**
 122          * This is the function that extracts metadata from the article body on the first view.
 123          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
 124          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
 125          */
 126         function extractMetaDataFromArticle () {
 127                 global $wgUseMetadataEdit , $wgMetadataWhitelist , $wgLang ;
 128                 $this->mMetaData = '' ;
 129                 if ( !$wgUseMetadataEdit ) return ;
 130                 if ( $wgMetadataWhitelist == '' ) return ;
 131                 $s = '' ;
 132                 $t = $this->getContent();
 133
 134                 # MISSING : <nowiki> filtering
 135
 136                 # Categories and language links
 137                 $t = explode ( "\n" , $t ) ;
 138                 $catlow = strtolower ( $wgLang->getNsText ( NS_CATEGORY ) ) ;
 139                 $cat = $ll = array() ;
 140                 foreach ( $t AS $key => $x )
 141                 {
 142                         $y = trim ( strtolower ( $x ) ) ;
 143                         while ( substr ( $y , 0 , 2 ) == '[[' )
 144                         {
 145                                 $y = explode ( ']]' , trim ( $x ) ) ;
 146                                 $first = array_shift ( $y ) ;
 147                                 $first = explode ( ':' , $first ) ;
 148                                 $ns = array_shift ( $first ) ;
 149                                 $ns = trim ( str_replace ( '[' , '' , $ns ) ) ;
 150                                 if ( strlen ( $ns ) == 2 OR strtolower ( $ns ) == $catlow )
 151                                 {
 152                                         $add = '[[' . $ns . ':' . implode ( ':' , $first ) . ']]' ;
 153                                         if ( strtolower ( $ns ) == $catlow ) $cat[] = $add ;
 154                                         else $ll[] = $add ;
 155                                         $x = implode ( ']]' , $y ) ;
 156                                         $t[$key] = $x ;
 157                                         $y = trim ( strtolower ( $x ) ) ;
 158                                 }
 159                         }
 160                 }
 161                 if ( count ( $cat ) ) $s .= implode ( ' ' , $cat ) . "\n" ;
 162                 if ( count ( $ll ) ) $s .= implode ( ' ' , $ll ) . "\n" ;
 163                 $t = implode ( "\n" , $t ) ;
 164
 165                 # Load whitelist
 166                 $sat = array () ; # stand-alone-templates; must be lowercase
 167                 $wl_title = Title::newFromText ( $wgMetadataWhitelist ) ;
 168                 $wl_article = new Article ( $wl_title ) ;
 169                 $wl = explode ( "\n" , $wl_article->getContent() ) ;
 170                 foreach ( $wl AS $x )
 171                 {
 172                         $isentry = false ;
 173                         $x = trim ( $x ) ;
 174                         while ( substr ( $x , 0 , 1 ) == '*' )
 175                         {
 176                                 $isentry = true ;
 177                                 $x = trim ( substr ( $x , 1 ) ) ;
 178                         }
 179                         if ( $isentry )
 180                         {
 181                                 $sat[] = strtolower ( $x ) ;
 182                         }
 183
 184                 }
 185
 186                 # Templates, but only some
 187                 $t = explode ( '{{' , $t ) ;
 188                 $tl = array () ;
 189                 foreach ( $t AS $key => $x )
 190                 {
 191                         $y = explode ( '}}' , $x , 2 ) ;
 192                         if ( count ( $y ) == 2 )
 193                         {
 194                                 $z = $y[0] ;
 195                                 $z = explode ( '|' , $z ) ;
 196                                 $tn = array_shift ( $z ) ;
 197                                 if ( in_array ( strtolower ( $tn ) , $sat ) )
 198                                 {
 199                                         $tl[] = '{{' . $y[0] . '}}' ;
 200                                         $t[$key] = $y[1] ;
 201                                         $y = explode ( '}}' , $y[1] , 2 ) ;
 202                                 }
 203                                 else $t[$key] = '{{' . $x ;
 204                         }
 205                         else if ( $key != 0 ) $t[$key] = '{{' . $x ;
 206                         else $t[$key] = $x ;
 207                 }
 208                 if ( count ( $tl ) ) $s .= implode ( ' ' , $tl ) ;
 209                 $t = implode ( '' , $t ) ;
 210
 211                 $t = str_replace ( "\n\n\n" , "\n" , $t ) ;
 212                 $this->mArticle->mContent = $t ;
 213                 $this->mMetaData = $s ;
 214         }
 215
 216         function submit() {
 217                 $this->edit();
 218         }
 219
 220         /**
 221          * This is the function that gets called for "action=edit". It
 222          * sets up various member variables, then passes execution to
 223          * another function, usually showEditForm()
 224          *
 225          * The edit form is self-submitting, so that when things like
 226          * preview and edit conflicts occur, we get the same form back
 227          * with the extra stuff added.  Only when the final submission
 228          * is made and all is well do we actually save and redirect to
 229          * the newly-edited page.
 230          */
 231         function edit() {
 232                 global $wgOut, $wgUser, $wgRequest, $wgTitle;
 233                 global $wgEmailConfirmToEdit;
 234
 235                 if ( ! wfRunHooks( 'AlternateEdit', array( &$this  ) ) )
 236                         return;
 237
 238                 $fname = 'EditPage::edit';
 239                 wfProfileIn( $fname );
 240                 wfDebug( "$fname: enter\n" );
 241
 242                 // this is not an article
 243                 $wgOut->setArticleFlag(false);
 244
 245                 $this->importFormData( $wgRequest );
 246                 $this->firsttime = false;
 247
 248                 if( $this->live ) {
 249                         $this->livePreview();
 250                         wfProfileOut( $fname );
 251                         return;
 252                 }
 253
 254                 if ( ! $this->mTitle->userCanEdit() ) {
 255                         wfDebug( "$fname: user can't edit\n" );
 256                         $wgOut->readOnlyPage( $this->getContent(), true );
 257                         wfProfileOut( $fname );
 258                         return;
 259                 }
 260                 wfDebug( "$fname: Checking blocks\n" );
 261                 if ( !$this->preview && !$this->diff && $wgUser->isBlockedFrom( $this->mTitle, !$this->save ) ) {
 262                         # When previewing, don't check blocked state - will get caught at save time.
 263                         # Also, check when starting edition is done against slave to improve performance.
 264                         wfDebug( "$fname: user is blocked\n" );
 265                         $this->blockedPage();
 266                         wfProfileOut( $fname );
 267                         return;
 268                 }
 269                 if ( !$wgUser->isAllowed('edit') ) {
 270                         if ( $wgUser->isAnon() ) {
 271                                 wfDebug( "$fname: user must log in\n" );
 272                                 $this->userNotLoggedInPage();
 273                                 wfProfileOut( $fname );
 274                                 return;
 275                         } else {
 276                                 wfDebug( "$fname: read-only page\n" );
 277                                 $wgOut->readOnlyPage( $this->getContent(), true );
 278                                 wfProfileOut( $fname );
 279                                 return;
 280                         }
 281                 }
 282                 if ($wgEmailConfirmToEdit && !$wgUser->isEmailConfirmed()) {
 283                         wfDebug("$fname: user must confirm e-mail address\n");
 284                         $this->userNotConfirmedPage();
 285                         wfProfileOut($fname);
 286                         return;
 287                 }
 288                 if ( !$this->mTitle->userCanCreate() && !$this->mTitle->exists() ) {
 289                         wfDebug( "$fname: no create permission\n" );
 290                         $this->noCreatePermission();
 291                         wfProfileOut( $fname );
 292                         return;
 293                 }
 294                 if ( wfReadOnly() ) {
 295                         wfDebug( "$fname: read-only mode is engaged\n" );
 296                         if( $this->save || $this->preview ) {
 297                                 $this->formtype = 'preview';
 298                         } else if ( $this->diff ) {
 299                                 $this->formtype = 'diff';
 300                         } else {
 301                                 $wgOut->readOnlyPage( $this->getContent() );
 302                                 wfProfileOut( $fname );
 303                                 return;
 304                         }
 305                 } else {
 306                         if ( $this->save ) {
 307                                 $this->formtype = 'save';
 308                         } else if ( $this->preview ) {
 309                                 $this->formtype = 'preview';
 310                         } else if ( $this->diff ) {
 311                                 $this->formtype = 'diff';
 312                         } else { # First time through
 313                                 $this->firsttime = true;
 314                                 if( $this->previewOnOpen() ) {
 315                                         $this->formtype = 'preview';
 316                                 } else {
 317                                         $this->extractMetaDataFromArticle () ;
 318                                         $this->formtype = 'initial';
 319                                 }
 320                         }
 321                 }
 322
 323                 wfProfileIn( "$fname-business-end" );
 324
 325                 $this->isConflict = false;
 326                 // css / js subpages of user pages get a special treatment
 327                 $this->isCssJsSubpage      = $wgTitle->isCssJsSubpage();
 328                 $this->isValidCssJsSubpage = $wgTitle->isValidCssJsSubpage();
 329
 330                 /* Notice that we can't use isDeleted, because it returns true if article is ever deleted
 331                  * no matter it's current state
 332                  */
 333                 $this->deletedSinceEdit = false;
 334                 if ( $this->edittime != '' ) {
 335                         /* Note that we rely on logging table, which hasn't been always there,
 336                          * but that doesn't matter, because this only applies to brand new
 337                          * deletes. This is done on every preview and save request. Move it further down
 338                          * to only perform it on saves
 339                          */
 340                         if ( $this->mTitle->isDeleted() ) {
 341                                 $this->lastDelete = $this->getLastDelete();
 342                                 if ( !is_null($this->lastDelete) ) {
 343                                         $deletetime = $this->lastDelete->log_timestamp;
 344                                         if ( ($deletetime - $this->starttime) > 0 ) {
 345                                                 $this->deletedSinceEdit = true;
 346                                         }
 347                                 }
 348                         }
 349                 }
 350
 351                 if(!$this->mTitle->getArticleID() && ('initial' == $this->formtype || $this->firsttime )) { # new article
 352                         $this->showIntro();
 353                 }
 354                 if( $this->mTitle->isTalkPage() ) {
 355                         $wgOut->addWikiText( wfMsg( 'talkpagetext' ) );
 356                 }
 357
 358                 # Attempt submission here.  This will check for edit conflicts,
 359                 # and redundantly check for locked database, blocked IPs, etc.
 360                 # that edit() already checked just in case someone tries to sneak
 361                 # in the back door with a hand-edited submission URL.
 362
 363                 if ( 'save' == $this->formtype ) {
 364                         if ( !$this->attemptSave() ) {
 365                                 wfProfileOut( "$fname-business-end" );
 366                                 wfProfileOut( $fname );
 367                                 return;
 368                         }
 369                 }
 370
 371                 # First time through: get contents, set time for conflict
 372                 # checking, etc.
 373                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 374                         $this->initialiseForm();
 375                         if( !$this->mTitle->getArticleId() )
 376                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 377                 }
 378
 379                 $this->showEditForm();
 380                 wfProfileOut( "$fname-business-end" );
 381                 wfProfileOut( $fname );
 382         }
 383
 384         /**
 385          * Return true if this page should be previewed when the edit form
 386          * is initially opened.
 387          * @return bool
 388          * @private
 389          */
 390         function previewOnOpen() {
 391                 global $wgUser;
 392                 return $this->section != 'new' &&
 393                         ( ( $wgUser->getOption( 'previewonfirst' ) && $this->mTitle->exists() ) ||
 394                                 ( $this->mTitle->getNamespace() == NS_CATEGORY &&
 395                                         !$this->mTitle->exists() ) );
 396         }
 397
 398         /**
 399          * @todo document
 400          * @param $request
 401          */
 402         function importFormData( &$request ) {
 403                 global $wgLang, $wgUser;
 404                 $fname = 'EditPage::importFormData';
 405                 wfProfileIn( $fname );
 406
 407                 if( $request->wasPosted() ) {
 408                         # These fields need to be checked for encoding.
 409                         # Also remove trailing whitespace, but don't remove _initial_
 410                         # whitespace from the text boxes. This may be significant formatting.
 411                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 412                         $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
 413                         $this->mMetaData = rtrim( $request->getText( 'metadata'   ) );
 414                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 415                         $this->summary   = $wgLang->truncate( $request->getText( 'wpSummary'  ), 250 );
 416
 417                         $this->edittime = $request->getVal( 'wpEdittime' );
 418                         $this->starttime = $request->getVal( 'wpStarttime' );
 419
 420                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 421
 422                         if( is_null( $this->edittime ) ) {
 423                                 # If the form is incomplete, force to preview.
 424                                 wfDebug( "$fname: Form data appears to be incomplete\n" );
 425                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 426                                 $this->preview  = true;
 427                         } else {
 428                                 /* Fallback for live preview */
 429                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 430                                 $this->diff = $request->getCheck( 'wpDiff' );
 431
 432                                 // Remember whether a save was requested, so we can indicate
 433                                 // if we forced preview due to session failure.
 434                                 $this->mTriedSave = !$this->preview;
 435
 436                                 if ( $this->tokenOk( $request ) ) {
 437                                         # Some browsers will not report any submit button
 438                                         # if the user hits enter in the comment box.
 439                                         # The unmarked state will be assumed to be a save,
 440                                         # if the form seems otherwise complete.
 441                                         wfDebug( "$fname: Passed token check.\n" );
 442                                 } else if ( $this->diff ) {
 443                                         # Failed token check, but only requested "Show Changes".
 444                                         wfDebug( "$fname: Failed token check; Show Changes requested.\n" );
 445                                 } else {
 446                                         # Page might be a hack attempt posted from
 447                                         # an external site. Preview instead of saving.
 448                                         wfDebug( "$fname: Failed token check; forcing preview\n" );
 449                                         $this->preview = true;
 450                                 }
 451                         }
 452                         $this->save    = ! ( $this->preview OR $this->diff );
 453                         if( !preg_match( '/^\d{14}$/', $this->edittime )) {
 454                                 $this->edittime = null;
 455                         }
 456
 457                         if( !preg_match( '/^\d{14}$/', $this->starttime )) {
 458                                 $this->starttime = null;
 459                         }
 460
 461                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 462
 463                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 464                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 465
 466                         # Don't force edit summaries when a user is editing their own user or talk page
 467                         if( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) && $this->mTitle->getText() == $wgUser->getName() ) {
 468                                 $this->allowBlankSummary = true;
 469                         } else {
 470                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' );
 471                         }
 472
 473                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 474                 } else {
 475                         # Not a posted form? Start with nothing.
 476                         wfDebug( "$fname: Not a posted form.\n" );
 477                         $this->textbox1  = '';
 478                         $this->textbox2  = '';
 479                         $this->mMetaData = '';
 480                         $this->summary   = '';
 481                         $this->edittime  = '';
 482                         $this->starttime = wfTimestampNow();
 483                         $this->preview   = false;
 484                         $this->save      = false;
 485                         $this->diff      = false;
 486                         $this->minoredit = false;
 487                         $this->watchthis = false;
 488                         $this->recreate  = false;
 489                 }
 490
 491                 $this->oldid = $request->getInt( 'oldid' );
 492
 493                 # Section edit can come from either the form or a link
 494                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 495
 496                 $this->live = $request->getCheck( 'live' );
 497                 $this->editintro = $request->getText( 'editintro' );
 498
 499                 wfProfileOut( $fname );
 500         }
 501
 502         /**
 503          * Make sure the form isn't faking a user's credentials.
 504          *
 505          * @param $request WebRequest
 506          * @return bool
 507          * @private
 508          */
 509         function tokenOk( &$request ) {
 510                 global $wgUser;
 511                 if( $wgUser->isAnon() ) {
 512                         # Anonymous users may not have a session
 513                         # open. Don't tokenize.
 514                         $this->mTokenOk = true;
 515                 } else {
 516                         $this->mTokenOk = $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
 517                 }
 518                 return $this->mTokenOk;
 519         }
 520
 521         /** */
 522         function showIntro() {
 523                 global $wgOut, $wgUser;
 524                 $addstandardintro=true;
 525                 if($this->editintro) {
 526                         $introtitle=Title::newFromText($this->editintro);
 527                         if(isset($introtitle) && $introtitle->userCanRead()) {
 528                                 $rev=Revision::newFromTitle($introtitle);
 529                                 if($rev) {
 530                                         $wgOut->addSecondaryWikiText($rev->getText());
 531                                         $addstandardintro=false;
 532                                 }
 533                         }
 534                 }
 535                 if($addstandardintro) {
 536                         if ( $wgUser->isLoggedIn() )
 537                                 $wgOut->addWikiText( wfMsg( 'newarticletext' ) );
 538                         else
 539                                 $wgOut->addWikiText( wfMsg( 'newarticletextanon' ) );
 540                 }
 541         }
 542
 543         /**
 544          * Attempt submission
 545          * @return bool false if output is done, true if the rest of the form should be displayed
 546          */
 547         function attemptSave() {
 548                 global $wgSpamRegex, $wgFilterCallback, $wgUser, $wgOut;
 549                 global $wgMaxArticleSize;
 550
 551                 $fname = 'EditPage::attemptSave';
 552                 wfProfileIn( $fname );
 553                 wfProfileIn( "$fname-checks" );
 554
 555                 # Reintegrate metadata
 556                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 557                 $this->mMetaData = '' ;
 558
 559                 # Check for spam
 560                 if ( $wgSpamRegex && preg_match( $wgSpamRegex, $this->textbox1, $matches ) ) {
 561                         $this->spamPage ( $matches[0] );
 562                         wfProfileOut( "$fname-checks" );
 563                         wfProfileOut( $fname );
 564                         return false;
 565                 }
 566                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section ) ) {
 567                         # Error messages or other handling should be performed by the filter function
 568                         wfProfileOut( $fname );
 569                         wfProfileOut( "$fname-checks" );
 570                         return false;
 571                 }
 572                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError ) ) ) {
 573                         # Error messages etc. could be handled within the hook...
 574                         wfProfileOut( $fname );
 575                         wfProfileOut( "$fname-checks" );
 576                         return false;
 577                 } elseif( $this->hookError != '' ) {
 578                         # ...or the hook could be expecting us to produce an error
 579                         wfProfileOut( "$fname-checks " );
 580                         wfProfileOut( $fname );
 581                         return true;
 582                 }
 583                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 584                         # Check block state against master, thus 'false'.
 585                         $this->blockedPage();
 586                         wfProfileOut( "$fname-checks" );
 587                         wfProfileOut( $fname );
 588                         return false;
 589                 }
 590                 $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 591                 if ( $this->kblength > $wgMaxArticleSize ) {
 592                         // Error will be displayed by showEditForm()
 593                         $this->tooBig = true;
 594                         wfProfileOut( "$fname-checks" );
 595                         wfProfileOut( $fname );
 596                         return true;
 597                 }
 598
 599                 if ( !$wgUser->isAllowed('edit') ) {
 600                         if ( $wgUser->isAnon() ) {
 601                                 $this->userNotLoggedInPage();
 602                                 wfProfileOut( "$fname-checks" );
 603                                 wfProfileOut( $fname );
 604                                 return false;
 605                         }
 606                         else {
 607                                 $wgOut->readOnlyPage();
 608                                 wfProfileOut( "$fname-checks" );
 609                                 wfProfileOut( $fname );
 610                                 return false;
 611                         }
 612                 }
 613
 614                 if ( wfReadOnly() ) {
 615                         $wgOut->readOnlyPage();
 616                         wfProfileOut( "$fname-checks" );
 617                         wfProfileOut( $fname );
 618                         return false;
 619                 }
 620                 if ( $wgUser->pingLimiter() ) {
 621                         $wgOut->rateLimited();
 622                         wfProfileOut( "$fname-checks" );
 623                         wfProfileOut( $fname );
 624                         return false;
 625                 }
 626
 627                 # If the article has been deleted while editing, don't save it without
 628                 # confirmation
 629                 if ( $this->deletedSinceEdit && !$this->recreate ) {
 630                         wfProfileOut( "$fname-checks" );
 631                         wfProfileOut( $fname );
 632                         return true;
 633                 }
 634
 635                 wfProfileOut( "$fname-checks" );
 636
 637                 # If article is new, insert it.
 638                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 639                 if ( 0 == $aid ) {
 640                         // Late check for create permission, just in case *PARANOIA*
 641                         if ( !$this->mTitle->userCanCreate() ) {
 642                                 wfDebug( "$fname: no create permission\n" );
 643                                 $this->noCreatePermission();
 644                                 wfProfileOut( $fname );
 645                                 return;
 646                         }
 647
 648                         # Don't save a new article if it's blank.
 649                         if ( ( '' == $this->textbox1 ) ) {
 650                                         $wgOut->redirect( $this->mTitle->getFullURL() );
 651                                         wfProfileOut( $fname );
 652                                         return false;
 653                         }
 654
 655                         # If no edit comment was given when creating a new page, and what's being
 656                         # created is a redirect, be smart and fill in a neat auto-comment
 657                         if( $this->summary == '' ) {
 658                                 $rt = Title::newFromRedirect( $this->textbox1 );
 659                                 if( is_object( $rt ) )
 660                                         $this->summary = wfMsgForContent( 'autoredircomment', $rt->getPrefixedText() );
 661                         }
 662
 663                         $isComment=($this->section=='new');
 664                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 665                                 $this->minoredit, $this->watchthis, false, $isComment);
 666
 667                         wfProfileOut( $fname );
 668                         return false;
 669                 }
 670
 671                 # Article exists. Check for edit conflict.
 672
 673                 $this->mArticle->clear(); # Force reload of dates, etc.
 674                 $this->mArticle->forUpdate( true ); # Lock the article
 675
 676                 if( $this->mArticle->getTimestamp() != $this->edittime ) {
 677                         $this->isConflict = true;
 678                         if( $this->section == 'new' ) {
 679                                 if( $this->mArticle->getUserText() == $wgUser->getName() &&
 680                                         $this->mArticle->getComment() == $this->summary ) {
 681                                         // Probably a duplicate submission of a new comment.
 682                                         // This can happen when squid resends a request after
 683                                         // a timeout but the first one actually went through.
 684                                         wfDebug( "EditPage::editForm duplicate new section submission; trigger edit conflict!\n" );
 685                                 } else {
 686                                         // New comment; suppress conflict.
 687                                         $this->isConflict = false;
 688                                         wfDebug( "EditPage::editForm conflict suppressed; new section\n" );
 689                                 }
 690                         }
 691                 }
 692                 $userid = $wgUser->getID();
 693
 694                 if ( $this->isConflict) {
 695                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 696                                 $this->mArticle->getTimestamp() . "'\n" );
 697                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime);
 698                 }
 699                 else {
 700                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 701                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary);
 702                 }
 703                 if( is_null( $text ) ) {
 704                         wfDebug( "EditPage::editForm activating conflict; section replace failed.\n" );
 705                         $this->isConflict = true;
 706                         $text = $this->textbox1;
 707                 }
 708
 709                 # Suppress edit conflict with self, except for section edits where merging is required.
 710                 if ( ( $this->section == '' ) && ( 0 != $userid ) && ( $this->mArticle->getUser() == $userid ) ) {
 711                         wfDebug( "Suppressing edit conflict, same user.\n" );
 712                         $this->isConflict = false;
 713                 } else {
 714                         # switch from section editing to normal editing in edit conflict
 715                         if($this->isConflict) {
 716                                 # Attempt merge
 717                                 if( $this->mergeChangesInto( $text ) ){
 718                                         // Successful merge! Maybe we should tell the user the good news?
 719                                         $this->isConflict = false;
 720                                         wfDebug( "Suppressing edit conflict, successful merge.\n" );
 721                                 } else {
 722                                         $this->section = '';
 723                                         $this->textbox1 = $text;
 724                                         wfDebug( "Keeping edit conflict, failed merge.\n" );
 725                                 }
 726                         }
 727                 }
 728
 729                 if ( $this->isConflict ) {
 730                         wfProfileOut( $fname );
 731                         return true;
 732                 }
 733
 734                 # If no edit comment was given when turning a page into a redirect, be smart
 735                 # and fill in a neat auto-comment
 736                 if( $this->summary == '' ) {
 737                         $rt = Title::newFromRedirect( $this->textbox1 );
 738                         if( is_object( $rt ) )
 739                                 $this->summary = wfMsgForContent( 'autoredircomment', $rt->getPrefixedText() );
 740                 }
 741
 742                 # Handle the user preference to force summaries here
 743                 if( $this->section != 'new' && !$this->allowBlankSummary && $wgUser->getOption( 'forceeditsummary' ) ) {
 744                         if( md5( $this->summary ) == $this->autoSumm ) {
 745                                 $this->missingSummary = true;
 746                                 wfProfileOut( $fname );
 747                                 return( true );
 748                         }
 749                 }
 750
 751                 #And a similar thing for new sections
 752                 if( $this->section == 'new' && !$this->allowBlankSummary && $wgUser->getOption( 'forceeditsummary' ) ) {
 753                         if (trim($this->summary) == '') {
 754                                 $this->missingSummary = true;
 755                                 wfProfileOut( $fname );
 756                                 return( true );
 757                         }
 758                 }
 759
 760                 # All's well
 761                 wfProfileIn( "$fname-sectionanchor" );
 762                 $sectionanchor = '';
 763                 if( $this->section == 'new' ) {
 764                         if ( $this->textbox1 == '' ) {
 765                                 $this->missingComment = true;
 766                                 return true;
 767                         }
 768                         if( $this->summary != '' ) {
 769                                 $sectionanchor = $this->sectionAnchor( $this->summary );
 770                         }
 771                 } elseif( $this->section != '' ) {
 772                         # Try to get a section anchor from the section source, redirect to edited section if header found
 773                         # XXX: might be better to integrate this into Article::replaceSection
 774                         # for duplicate heading checking and maybe parsing
 775                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 776                         # we can't deal with anchors, includes, html etc in the header for now,
 777                         # headline would need to be parsed to improve this
 778                         if($hasmatch and strlen($matches[2]) > 0) {
 779                                 $sectionanchor = $this->sectionAnchor( $matches[2] );
 780                         }
 781                 }
 782                 wfProfileOut( "$fname-sectionanchor" );
 783
 784                 // Save errors may fall down to the edit form, but we've now
 785                 // merged the section into full text. Clear the section field
 786                 // so that later submission of conflict forms won't try to
 787                 // replace that into a duplicated mess.
 788                 $this->textbox1 = $text;
 789                 $this->section = '';
 790
 791                 // Check for length errors again now that the section is merged in
 792                 $this->kblength = (int)(strlen( $text ) / 1024);
 793                 if ( $this->kblength > $wgMaxArticleSize ) {
 794                         $this->tooBig = true;
 795                         wfProfileOut( $fname );
 796                         return true;
 797                 }
 798
 799                 # update the article here
 800                 if( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
 801                         $this->watchthis, '', $sectionanchor ) ) {
 802                         wfProfileOut( $fname );
 803                         return false;
 804                 } else {
 805                         $this->isConflict = true;
 806                 }
 807                 wfProfileOut( $fname );
 808                 return true;
 809         }
 810
 811         /**
 812          * Initialise form fields in the object
 813          * Called on the first invocation, e.g. when a user clicks an edit link
 814          */
 815         function initialiseForm() {
 816                 $this->edittime = $this->mArticle->getTimestamp();
 817                 $this->textbox1 = $this->getContent();
 818                 $this->summary = '';
 819                 if ( !$this->mArticle->exists() && $this->mArticle->mTitle->getNamespace() == NS_MEDIAWIKI )
 820                         $this->textbox1 = wfMsgWeirdKey( $this->mArticle->mTitle->getText() ) ;
 821                 wfProxyCheck();
 822         }
 823
 824         /**
 825          * Send the edit form and related headers to $wgOut
 826          * @param $formCallback Optional callable that takes an OutputPage
 827          *                      parameter; will be called during form output
 828          *                      near the top, for captchas and the like.
 829          */
 830         function showEditForm( $formCallback=null ) {
 831                 global $wgOut, $wgUser, $wgLang, $wgContLang, $wgMaxArticleSize;
 832
 833                 $fname = 'EditPage::showEditForm';
 834                 wfProfileIn( $fname );
 835
 836                 $sk =& $wgUser->getSkin();
 837
 838                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) ) ;
 839
 840                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 841
 842                 # Enabled article-related sidebar, toplinks, etc.
 843                 $wgOut->setArticleRelated( true );
 844
 845                 if ( $this->isConflict ) {
 846                         $s = wfMsg( 'editconflict', $this->mTitle->getPrefixedText() );
 847                         $wgOut->setPageTitle( $s );
 848                         $wgOut->addWikiText( wfMsg( 'explainconflict' ) );
 849
 850                         $this->textbox2 = $this->textbox1;
 851                         $this->textbox1 = $this->getContent();
 852                         $this->edittime = $this->mArticle->getTimestamp();
 853                 } else {
 854
 855                         if( $this->section != '' ) {
 856                                 if( $this->section == 'new' ) {
 857                                         $s = wfMsg('editingcomment', $this->mTitle->getPrefixedText() );
 858                                 } else {
 859                                         $s = wfMsg('editingsection', $this->mTitle->getPrefixedText() );
 860                                         if( !$this->summary && !$this->preview && !$this->diff ) {
 861                                                 preg_match( "/^(=+)(.+)\\1/mi",
 862                                                         $this->textbox1,
 863                                                         $matches );
 864                                                 if( !empty( $matches[2] ) ) {
 865                                                         $this->summary = "/* ". trim($matches[2])." */ ";
 866                                                 }
 867                                         }
 868                                 }
 869                         } else {
 870                                 $s = wfMsg( 'editing', $this->mTitle->getPrefixedText() );
 871                         }
 872                         $wgOut->setPageTitle( $s );
 873
 874                         if ( $this->missingComment ) {
 875                                 $wgOut->addWikiText( wfMsg( 'missingcommenttext' ) );
 876                         }
 877
 878                         if( $this->missingSummary && $this->section != 'new' ) {
 879                                 $wgOut->addWikiText( wfMsg( 'missingsummary' ) );
 880                         }
 881
 882                         if( $this->missingSummary && $this->section == 'new' ) {
 883                                 $wgOut->addWikiText( wfMsg( 'missingcommentheader' ) );
 884                         }
 885
 886                         if( !$this->hookError == '' ) {
 887                                 $wgOut->addWikiText( $this->hookError );
 888                         }
 889
 890                         if ( !$this->checkUnicodeCompliantBrowser() ) {
 891                                 $wgOut->addWikiText( wfMsg( 'nonunicodebrowser') );
 892                         }
 893                         if ( isset( $this->mArticle )
 894                              && isset( $this->mArticle->mRevision )
 895                              && !$this->mArticle->mRevision->isCurrent() ) {
 896                                 $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
 897                                 $wgOut->addWikiText( wfMsg( 'editingold' ) );
 898                         }
 899                 }
 900
 901                 if( wfReadOnly() ) {
 902                         $wgOut->addWikiText( wfMsg( 'readonlywarning' ) );
 903                 } elseif( $wgUser->isAnon() && $this->formtype != 'preview' ) {
 904                         $wgOut->addWikiText( wfMsg( 'anoneditwarning' ) );
 905                 } else {
 906                         if( $this->isCssJsSubpage && $this->formtype != 'preview' ) {
 907                                 # Check the skin exists
 908                                 if( $this->isValidCssJsSubpage ) {
 909                                         $wgOut->addWikiText( wfMsg( 'usercssjsyoucanpreview' ) );
 910                                 } else {
 911                                         $wgOut->addWikiText( wfMsg( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
 912                                 }
 913                         }
 914                 }
 915
 916                 if( $this->mTitle->isProtected( 'edit' ) ) {
 917                         # Is the protection due to the namespace, e.g. interface text?
 918                         if( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 919                                 # Yes; remind the user
 920                                 $notice = wfMsg( 'editinginterface' );
 921                         } elseif( $this->mTitle->isSemiProtected() ) {
 922                                 # No; semi protected
 923                                 $notice = wfMsg( 'semiprotectedpagewarning' );
 924                                 if( wfEmptyMsg( 'semiprotectedpagewarning', $notice ) || $notice == '-' ) {
 925                                         $notice = '';
 926                                 }
 927                         } else {
 928                                 # No; regular protection
 929                                 $notice = wfMsg( 'protectedpagewarning' );
 930                         }
 931                         $wgOut->addWikiText( $notice );
 932                 }
 933
 934                 if ( $this->kblength === false ) {
 935                         $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 936                 }
 937                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
 938                         $wgOut->addWikiText( wfMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgMaxArticleSize ) );
 939                 } elseif( $this->kblength > 29 ) {
 940                         $wgOut->addWikiText( wfMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) ) );
 941                 }
 942
 943                 $rows = $wgUser->getIntOption( 'rows' );
 944                 $cols = $wgUser->getIntOption( 'cols' );
 945
 946                 $ew = $wgUser->getOption( 'editwidth' );
 947                 if ( $ew ) $ew = " style=\"width:100%\"";
 948                 else $ew = '';
 949
 950                 $q = 'action=submit';
 951                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
 952                 $action = $this->mTitle->escapeLocalURL( $q );
 953
 954                 $summary = wfMsg('summary');
 955                 $subject = wfMsg('subject');
 956                 $minor   = wfMsgExt('minoredit', array('parseinline'));
 957                 $watchthis = wfMsgExt('watchthis', array('parseinline'));
 958
 959                 $cancel = $sk->makeKnownLink( $this->mTitle->getPrefixedText(),
 960                                 wfMsgExt('cancel', array('parseinline')) );
 961                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ));
 962                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
 963                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
 964                         htmlspecialchars( wfMsg( 'newwindow' ) );
 965
 966                 global $wgRightsText;
 967                 $copywarn = "<div id=\"editpage-copywarn\">\n" .
 968                         wfMsg( $wgRightsText ? 'copyrightwarning' : 'copyrightwarning2',
 969                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
 970                                 $wgRightsText ) . "\n</div>";
 971
 972                 if( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
 973                         # prepare toolbar for edit buttons
 974                         $toolbar = $this->getEditToolbar();
 975                 } else {
 976                         $toolbar = '';
 977                 }
 978
 979                 // activate checkboxes if user wants them to be always active
 980                 if( !$this->preview && !$this->diff ) {
 981                         # Sort out the "watch" checkbox
 982                         if( $wgUser->getOption( 'watchdefault' ) ) {
 983                                 # Watch all edits
 984                                 $this->watchthis = true;
 985                         } elseif( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 986                                 # Watch creations
 987                                 $this->watchthis = true;
 988                         } elseif( $this->mTitle->userIsWatching() ) {
 989                                 # Already watched
 990                                 $this->watchthis = true;
 991                         }
 992
 993                         if( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
 994                 }
 995
 996                 $minoredithtml = '';
 997
 998                 if ( $wgUser->isAllowed('minoredit') ) {
 999                         $minoredithtml =
1000                                 "<input tabindex='3' type='checkbox' value='1' name='wpMinoredit'".($this->minoredit?" checked='checked'":"").
1001                                 " accesskey='".wfMsg('accesskey-minoredit')."' id='wpMinoredit' />\n".
1002                                 "<label for='wpMinoredit' title='".wfMsg('tooltip-minoredit')."'>{$minor}</label>\n";
1003                 }
1004
1005                 $watchhtml = '';
1006
1007                 if ( $wgUser->isLoggedIn() ) {
1008                         $watchhtml = "<input tabindex='4' type='checkbox' name='wpWatchthis'".
1009                                 ($this->watchthis?" checked='checked'":"").
1010                                 " accesskey=\"".htmlspecialchars(wfMsg('accesskey-watch'))."\" id='wpWatchthis'  />\n".
1011                                 "<label for='wpWatchthis' title=\"" .
1012                                         htmlspecialchars(wfMsg('tooltip-watch'))."\">{$watchthis}</label>\n";
1013                 }
1014
1015                 $checkboxhtml = $minoredithtml . $watchhtml;
1016
1017                 if ( $wgUser->getOption( 'previewontop' ) ) {
1018
1019                         if ( 'preview' == $this->formtype ) {
1020                                 $this->showPreview();
1021                         } else {
1022                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
1023                         }
1024
1025                         if ( 'diff' == $this->formtype ) {
1026                                 $wgOut->addHTML( $this->getDiff() );
1027                         }
1028                 }
1029
1030
1031                 # if this is a comment, show a subject line at the top, which is also the edit summary.
1032                 # Otherwise, show a summary field at the bottom
1033                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
1034                 if( $this->section == 'new' ) {
1035                         $commentsubject="<span id='wpSummaryLabel'><label for='wpSummary'>{$subject}:</label></span>\n<div class='editOptions'>\n<input tabindex='1' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
1036                         $editsummary = '';
1037                 } else {
1038                         $commentsubject = '';
1039                         $editsummary="<span id='wpSummaryLabel'><label for='wpSummary'>{$summary}:</label></span>\n<div class='editOptions'>\n<input tabindex='2' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
1040                 }
1041
1042                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
1043                 if( !$this->preview && !$this->diff ) {
1044                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
1045                 }
1046                 $templates = $this->formatTemplates();
1047
1048                 global $wgUseMetadataEdit ;
1049                 if ( $wgUseMetadataEdit ) {
1050                         $metadata = $this->mMetaData ;
1051                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
1052                         $top = wfMsgWikiHtml( 'metadata_help' );
1053                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
1054                 }
1055                 else $metadata = "" ;
1056
1057                 $hidden = '';
1058                 $recreate = '';
1059                 if ($this->deletedSinceEdit) {
1060                         if ( 'save' != $this->formtype ) {
1061                                 $wgOut->addWikiText( wfMsg('deletedwhileediting'));
1062                         } else {
1063                                 // Hide the toolbar and edit area, use can click preview to get it back
1064                                 // Add an confirmation checkbox and explanation.
1065                                 $toolbar = '';
1066                                 $hidden = 'type="hidden" style="display:none;"';
1067                                 $recreate = $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ));
1068                                 $recreate .=
1069                                         "<br /><input tabindex='1' type='checkbox' value='1' name='wpRecreate' id='wpRecreate' />".
1070                                         "<label for='wpRecreate' title='".wfMsg('tooltip-recreate')."'>". wfMsg('recreate')."</label>";
1071                         }
1072                 }
1073
1074                 $temp = array(
1075                         'id'        => 'wpSave',
1076                         'name'      => 'wpSave',
1077                         'type'      => 'submit',
1078                         'tabindex'  => '5',
1079                         'value'     => wfMsg('savearticle'),
1080                         'accesskey' => wfMsg('accesskey-save'),
1081                         'title'     => wfMsg('tooltip-save'),
1082                 );
1083                 $buttons['save'] = wfElement('input', $temp, '');
1084                 $temp = array(
1085                         'id'        => 'wpDiff',
1086                         'name'      => 'wpDiff',
1087                         'type'      => 'submit',
1088                         'tabindex'  => '7',
1089                         'value'     => wfMsg('showdiff'),
1090                         'accesskey' => wfMsg('accesskey-diff'),
1091                         'title'     => wfMsg('tooltip-diff'),
1092                 );
1093                 $buttons['diff'] = wfElement('input', $temp, '');
1094
1095                 global $wgLivePreview;
1096                 if ( $wgLivePreview && $wgUser->getOption( 'uselivepreview' ) ) {
1097                         $temp = array(
1098                                 'id'        => 'wpPreview',
1099                                 'name'      => 'wpPreview',
1100                                 'type'      => 'submit',
1101                                 'tabindex'  => '6',
1102                                 'value'     => wfMsg('showpreview'),
1103                                 'accesskey' => '',
1104                                 'title'     => wfMsg('tooltip-preview'),
1105                                 'style'     => 'display: none;',
1106                         );
1107                         $buttons['preview'] = wfElement('input', $temp, '');
1108                         $temp = array(
1109                                 'id'        => 'wpLivePreview',
1110                                 'name'      => 'wpLivePreview',
1111                                 'type'      => 'submit',
1112                                 'tabindex'  => '6',
1113                                 'value'     => wfMsg('showlivepreview'),
1114                                 'accesskey' => wfMsg('accesskey-preview'),
1115                                 'title'     => '',
1116                                 'onclick'   => $this->doLivePreviewScript(),
1117                         );
1118                         $buttons['live'] = wfElement('input', $temp, '');
1119                 } else {
1120                         $temp = array(
1121                                 'id'        => 'wpPreview',
1122                                 'name'      => 'wpPreview',
1123                                 'type'      => 'submit',
1124                                 'tabindex'  => '6',
1125                                 'value'     => wfMsg('showpreview'),
1126                                 'accesskey' => wfMsg('accesskey-preview'),
1127                                 'title'     => wfMsg('tooltip-preview'),
1128                         );
1129                         $buttons['preview'] = wfElement('input', $temp, '');
1130                         $buttons['live'] = '';
1131                 }
1132
1133                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
1134                         ? ""
1135                         : "<input type='hidden' name=\"safemode\" value='1' />\n";
1136
1137                 $wgOut->addHTML( <<<END
1138 {$toolbar}
1139 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1140 END
1141 );
1142
1143                 if( is_callable( $formCallback ) ) {
1144                         call_user_func_array( $formCallback, array( &$wgOut ) );
1145                 }
1146
1147                 // Put these up at the top to ensure they aren't lost on early form submission
1148                 $wgOut->addHTML( "
1149 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
1150 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
1151 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
1152 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
1153
1154                 $wgOut->addHTML( <<<END
1155 $recreate
1156 {$commentsubject}
1157 <textarea tabindex='1' accesskey="," name="wpTextbox1" id="wpTextbox1" rows='{$rows}'
1158 cols='{$cols}'{$ew} $hidden>
1159 END
1160 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox1 ) ) .
1161 "
1162 </textarea>
1163                 " );
1164
1165                 $wgOut->addWikiText( $copywarn );
1166                 $wgOut->addHTML( "
1167 {$metadata}
1168 {$editsummary}
1169 {$checkboxhtml}
1170 {$safemodehtml}
1171 ");
1172
1173                 $wgOut->addHTML(
1174 "<div class='editButtons'>
1175         {$buttons['save']}
1176         {$buttons['preview']}
1177         {$buttons['live']}
1178         {$buttons['diff']}
1179         <span class='editHelp'>{$cancel} | {$edithelp}</span>
1180 </div><!-- editButtons -->
1181 </div><!-- editOptions -->");
1182
1183                 $wgOut->addWikiText( wfMsgForContent( 'edittools' ) );
1184
1185                 $wgOut->addHTML( "
1186 <div class='templatesUsed'>
1187 {$templates}
1188 </div>
1189 " );
1190
1191                 if ( $wgUser->isLoggedIn() ) {
1192                         /**
1193                          * To make it harder for someone to slip a user a page
1194                          * which submits an edit form to the wiki without their
1195                          * knowledge, a random token is associated with the login
1196                          * session. If it's not passed back with the submission,
1197                          * we won't save the page, or render user JavaScript and
1198                          * CSS previews.
1199                          */
1200                         $token = htmlspecialchars( $wgUser->editToken() );
1201                         $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
1202                 }
1203
1204                 # If a blank edit summary was previously provided, and the appropriate
1205                 # user preference is active, pass a hidden tag here. This will stop the
1206                 # user being bounced back more than once in the event that a summary
1207                 # is not required.
1208                 if( $this->missingSummary ) {
1209                         $wgOut->addHTML( "<input type=\"hidden\" name=\"wpIgnoreBlankSummary\" value=\"1\" />\n" );
1210                 }
1211
1212                 # For a bit more sophisticated detection of blank summaries, hash the
1213                 # automatic one and pass that in a hidden field.
1214                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1215                 $wgOut->addHtml( wfHidden( 'wpAutoSummary', $autosumm ) );
1216
1217                 if ( $this->isConflict ) {
1218                         $wgOut->addWikiText( '==' . wfMsg( "yourdiff" ) . '==' );
1219
1220                         $de = new DifferenceEngine( $this->mTitle );
1221                         $de->setText( $this->textbox2, $this->textbox1 );
1222                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1223
1224                         $wgOut->addWikiText( '==' . wfMsg( "yourtext" ) . '==' );
1225                         $wgOut->addHTML( "<textarea tabindex=6 id='wpTextbox2' name=\"wpTextbox2\" rows='{$rows}' cols='{$cols}' wrap='virtual'>"
1226                                 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox2 ) ) . "\n</textarea>" );
1227                 }
1228                 $wgOut->addHTML( "</form>\n" );
1229                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1230
1231                         if ( $this->formtype == 'preview') {
1232                                 $this->showPreview();
1233                         } else {
1234                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
1235                         }
1236
1237                         if ( $this->formtype == 'diff') {
1238                                 $wgOut->addHTML( $this->getDiff() );
1239                         }
1240
1241                 }
1242
1243                 wfProfileOut( $fname );
1244         }
1245
1246         /**
1247          * Append preview output to $wgOut.
1248          * Includes category rendering if this is a category page.
1249          * @private
1250          */
1251         function showPreview() {
1252                 global $wgOut;
1253                 $wgOut->addHTML( '<div id="wikiPreview">' );
1254                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1255                         $this->mArticle->openShowCategory();
1256                 }
1257                 $previewOutput = $this->getPreviewText();
1258                 $wgOut->addHTML( $previewOutput );
1259                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1260                         $this->mArticle->closeShowCategory();
1261                 }
1262                 $wgOut->addHTML( "<br style=\"clear:both;\" />\n" );
1263                 $wgOut->addHTML( '</div>' );
1264         }
1265
1266         /**
1267          * Prepare a list of templates used by this page. Returns HTML.
1268          */
1269         function formatTemplates() {
1270                 global $wgUser;
1271
1272                 $fname = 'EditPage::formatTemplates';
1273                 wfProfileIn( $fname );
1274
1275                 $sk =& $wgUser->getSkin();
1276
1277                 $outText = '';
1278                 $templates = $this->mArticle->getUsedTemplates();
1279                 if ( count( $templates ) > 0 ) {
1280                         # Do a batch existence check
1281                         $batch = new LinkBatch;
1282                         foreach( $templates as $title ) {
1283                                 $batch->addObj( $title );
1284                         }
1285                         $batch->execute();
1286
1287                         # Construct the HTML
1288                         $outText = '<div class="mw-templatesUsedExplanation">' .
1289                                 wfMsgExt( 'templatesused', array( 'parse' ) ) .
1290                                 '</div><ul>';
1291                         foreach ( $templates as $titleObj ) {
1292                                 $outText .= '<li>' . $sk->makeLinkObj( $titleObj ) . '</li>';
1293                         }
1294                         $outText .= '</ul>';
1295                 }
1296                 wfProfileOut( $fname );
1297                 return $outText;
1298         }
1299
1300         /**
1301          * Live Preview lets us fetch rendered preview page content and
1302          * add it to the page without refreshing the whole page.
1303          * If not supported by the browser it will fall through to the normal form
1304          * submission method.
1305          *
1306          * This function outputs a script tag to support live preview, and
1307          * returns an onclick handler which should be added to the attributes
1308          * of the preview button
1309          */
1310         function doLivePreviewScript() {
1311                 global $wgStylePath, $wgJsMimeType, $wgStyleVersion, $wgOut, $wgTitle;
1312                 $wgOut->addHTML( '<script type="'.$wgJsMimeType.'" src="' .
1313                         htmlspecialchars( "$wgStylePath/common/preview.js?$wgStyleVersion" ) .
1314                         '"></script>' . "\n" );
1315                 $liveAction = $wgTitle->getLocalUrl( 'action=submit&wpPreview=true&live=true' );
1316                 return "return !livePreview(" .
1317                         "getElementById('wikiPreview')," .
1318                         "editform.wpTextbox1.value," .
1319                         '"' . $liveAction . '"' . ")";
1320         }
1321
1322         function getLastDelete() {
1323                 $dbr =& wfGetDB( DB_SLAVE );
1324                 $fname = 'EditPage::getLastDelete';
1325                 $res = $dbr->select(
1326                         array( 'logging', 'user' ),
1327                         array( 'log_type',
1328                                'log_action',
1329                                'log_timestamp',
1330                                'log_user',
1331                                'log_namespace',
1332                                'log_title',
1333                                'log_comment',
1334                                'log_params',
1335                                'user_name', ),
1336                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1337                                'log_title' => $this->mTitle->getDBkey(),
1338                                'log_type' => 'delete',
1339                                'log_action' => 'delete',
1340                                'user_id=log_user' ),
1341                         $fname,
1342                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
1343
1344                 if($dbr->numRows($res) == 1) {
1345                         while ( $x = $dbr->fetchObject ( $res ) )
1346                                 $data = $x;
1347                         $dbr->freeResult ( $res ) ;
1348                 } else {
1349                         $data = null;
1350                 }
1351                 return $data;
1352         }
1353
1354         /**
1355          * @todo document
1356          */
1357         function getPreviewText() {
1358                 global $wgOut, $wgUser, $wgTitle, $wgParser;
1359
1360                 $fname = 'EditPage::getPreviewText';
1361                 wfProfileIn( $fname );
1362
1363                 if ( $this->mTriedSave && !$this->mTokenOk ) {
1364                         $msg = 'session_fail_preview';
1365                 } else {
1366                         $msg = 'previewnote';
1367                 }
1368                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
1369                         "<div class='previewnote'>" . $wgOut->parse( wfMsg( $msg ) ) . "</div>\n";
1370                 if ( $this->isConflict ) {
1371                         $previewhead.='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1372                 }
1373
1374                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1375                 $parserOptions->setEditSection( false );
1376
1377                 global $wgRawHtml;
1378                 if( $wgRawHtml && !$this->mTokenOk ) {
1379                         // Could be an offsite preview attempt. This is very unsafe if
1380                         // HTML is enabled, as it could be an attack.
1381                         return $wgOut->parse( "<div class='previewnote'>" .
1382                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1383                 }
1384
1385                 # don't parse user css/js, show message about preview
1386                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1387
1388                 if ( $this->isCssJsSubpage ) {
1389                         if(preg_match("/\\.css$/", $wgTitle->getText() ) ) {
1390                                 $previewtext = wfMsg('usercsspreview');
1391                         } else if(preg_match("/\\.js$/", $wgTitle->getText() ) ) {
1392                                 $previewtext = wfMsg('userjspreview');
1393                         }
1394                         $parserOptions->setTidy(true);
1395                         $parserOutput = $wgParser->parse( $previewtext , $wgTitle, $parserOptions );
1396                         $wgOut->addHTML( $parserOutput->mText );
1397                         wfProfileOut( $fname );
1398                         return $previewhead;
1399                 } else {
1400                         $toparse = $this->textbox1;
1401
1402                         # If we're adding a comment, we need to show the
1403                         # summary as the headline
1404                         if($this->section=="new" && $this->summary!="") {
1405                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1406                         }
1407
1408                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData ;
1409                         $parserOptions->setTidy(true);
1410                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ) ."\n\n",
1411                                         $wgTitle, $parserOptions );
1412
1413                         $previewHTML = $parserOutput->getText();
1414                         $wgOut->addParserOutputNoText( $parserOutput );
1415
1416                         wfProfileOut( $fname );
1417                         return $previewhead . $previewHTML;
1418                 }
1419         }
1420
1421         /**
1422          * Call the stock "user is blocked" page
1423          */
1424         function blockedPage() {
1425                 global $wgOut, $wgUser;
1426                 $wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
1427
1428                 # If the user made changes, preserve them when showing the markup
1429                 # (This happens when a user is blocked during edit, for instance)
1430                 $first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
1431                 if( $first ) {
1432                         $source = $this->mTitle->exists() ? $this->getContent() : false;
1433                 } else {
1434                         $source = $this->textbox1;
1435                 }
1436
1437                 # Spit out the source or the user's modified version
1438                 if( $source !== false ) {
1439                         $rows = $wgUser->getOption( 'rows' );
1440                         $cols = $wgUser->getOption( 'cols' );
1441                         $attribs = array( 'id' => 'wpTextbox1', 'name' => 'wpTextbox1', 'cols' => $cols, 'rows' => $rows, 'readonly' => 'readonly' );
1442                         $wgOut->addHtml( '<hr />' );
1443                         $wgOut->addWikiText( wfMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() ) );
1444                         $wgOut->addHtml( wfOpenElement( 'textarea', $attribs ) . htmlspecialchars( $source ) . wfCloseElement( 'textarea' ) );
1445                 }
1446         }
1447
1448         /**
1449          * Produce the stock "please login to edit pages" page
1450          */
1451         function userNotLoggedInPage() {
1452                 global $wgUser, $wgOut;
1453                 $skin = $wgUser->getSkin();
1454
1455                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1456                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $this->mTitle->getPrefixedUrl() );
1457
1458                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1459                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1460                 $wgOut->setArticleRelated( false );
1461
1462                 $wgOut->addHtml( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
1463                 $wgOut->returnToMain( false, $this->mTitle->getPrefixedUrl() );
1464         }
1465
1466         /**
1467          * Creates a basic error page which informs the user that
1468          * they have to validate their email address before being
1469          * allowed to edit.
1470          */
1471         function userNotConfirmedPage() {
1472                 global $wgOut;
1473
1474                 $wgOut->setPageTitle( wfMsg( 'confirmedittitle' ) );
1475                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1476                 $wgOut->setArticleRelated( false );
1477
1478                 $wgOut->addWikiText( wfMsg( 'confirmedittext' ) );
1479                 $wgOut->returnToMain( false );
1480         }
1481
1482         /**
1483          * Produce the stock "your edit contains spam" page
1484          *
1485          * @param $match Text which triggered one or more filters
1486          */
1487         function spamPage( $match = false ) {
1488                 global $wgOut;
1489
1490                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1491                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1492                 $wgOut->setArticleRelated( false );
1493
1494                 $wgOut->addWikiText( wfMsg( 'spamprotectiontext' ) );
1495                 if ( $match )
1496                         $wgOut->addWikiText( wfMsg( 'spamprotectionmatch', "<nowiki>{$match}</nowiki>" ) );
1497
1498                 $wgOut->returnToMain( false );
1499         }
1500
1501         /**
1502          * @private
1503          * @todo document
1504          */
1505         function mergeChangesInto( &$editText ){
1506                 $fname = 'EditPage::mergeChangesInto';
1507                 wfProfileIn( $fname );
1508
1509                 $db =& wfGetDB( DB_MASTER );
1510
1511                 // This is the revision the editor started from
1512                 $baseRevision = Revision::loadFromTimestamp(
1513                         $db, $this->mArticle->mTitle, $this->edittime );
1514                 if( is_null( $baseRevision ) ) {
1515                         wfProfileOut( $fname );
1516                         return false;
1517                 }
1518                 $baseText = $baseRevision->getText();
1519
1520                 // The current state, we want to merge updates into it
1521                 $currentRevision =  Revision::loadFromTitle(
1522                         $db, $this->mArticle->mTitle );
1523                 if( is_null( $currentRevision ) ) {
1524                         wfProfileOut( $fname );
1525                         return false;
1526                 }
1527                 $currentText = $currentRevision->getText();
1528
1529                 if( wfMerge( $baseText, $editText, $currentText, $result ) ){
1530                         $editText = $result;
1531                         wfProfileOut( $fname );
1532                         return true;
1533                 } else {
1534                         wfProfileOut( $fname );
1535                         return false;
1536                 }
1537         }
1538
1539         /**
1540          * Check if the browser is on a blacklist of user-agents known to
1541          * mangle UTF-8 data on form submission. Returns true if Unicode
1542          * should make it through, false if it's known to be a problem.
1543          * @return bool
1544          * @private
1545          */
1546         function checkUnicodeCompliantBrowser() {
1547                 global $wgBrowserBlackList;
1548                 if( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
1549                         // No User-Agent header sent? Trust it by default...
1550                         return true;
1551                 }
1552                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1553                 foreach ( $wgBrowserBlackList as $browser ) {
1554                         if ( preg_match($browser, $currentbrowser) ) {
1555                                 return false;
1556                         }
1557                 }
1558                 return true;
1559         }
1560
1561         /**
1562          * Format an anchor fragment as it would appear for a given section name
1563          * @param string $text
1564          * @return string
1565          * @private
1566          */
1567         function sectionAnchor( $text ) {
1568                 $headline = Sanitizer::decodeCharReferences( $text );
1569                 # strip out HTML
1570                 $headline = preg_replace( '/<.*?' . '>/', '', $headline );
1571                 $headline = trim( $headline );
1572                 $sectionanchor = '#' . urlencode( str_replace( ' ', '_', $headline ) );
1573                 $replacearray = array(
1574                         '%3A' => ':',
1575                         '%' => '.'
1576                 );
1577                 return str_replace(
1578                         array_keys( $replacearray ),
1579                         array_values( $replacearray ),
1580                         $sectionanchor );
1581         }
1582
1583         /**
1584          * Shows a bulletin board style toolbar for common editing functions.
1585          * It can be disabled in the user preferences.
1586          * The necessary JavaScript code can be found in style/wikibits.js.
1587          */
1588         function getEditToolbar() {
1589                 global $wgStylePath, $wgContLang, $wgJsMimeType;
1590
1591                 /**
1592                  * toolarray an array of arrays which each include the filename of
1593                  * the button image (without path), the opening tag, the closing tag,
1594                  * and optionally a sample text that is inserted between the two when no
1595                  * selection is highlighted.
1596                  * The tip text is shown when the user moves the mouse over the button.
1597                  *
1598                  * Already here are accesskeys (key), which are not used yet until someone
1599                  * can figure out a way to make them work in IE. However, we should make
1600                  * sure these keys are not defined on the edit page.
1601                  */
1602                 $toolarray=array(
1603                         array(  'image'=>'button_bold.png',
1604                                         'open'  =>      "\'\'\'",
1605                                         'close' =>      "\'\'\'",
1606                                         'sample'=>      wfMsg('bold_sample'),
1607                                         'tip'   =>      wfMsg('bold_tip'),
1608                                         'key'   =>      'B'
1609                                 ),
1610                         array(  'image'=>'button_italic.png',
1611                                         'open'  =>      "\'\'",
1612                                         'close' =>      "\'\'",
1613                                         'sample'=>      wfMsg('italic_sample'),
1614                                         'tip'   =>      wfMsg('italic_tip'),
1615                                         'key'   =>      'I'
1616                                 ),
1617                         array(  'image'=>'button_link.png',
1618                                         'open'  =>      '[[',
1619                                         'close' =>      ']]',
1620                                         'sample'=>      wfMsg('link_sample'),
1621                                         'tip'   =>      wfMsg('link_tip'),
1622                                         'key'   =>      'L'
1623                                 ),
1624                         array(  'image'=>'button_extlink.png',
1625                                         'open'  =>      '[',
1626                                         'close' =>      ']',
1627                                         'sample'=>      wfMsg('extlink_sample'),
1628                                         'tip'   =>      wfMsg('extlink_tip'),
1629                                         'key'   =>      'X'
1630                                 ),
1631                         array(  'image'=>'button_headline.png',
1632                                         'open'  =>      "\\n== ",
1633                                         'close' =>      " ==\\n",
1634                                         'sample'=>      wfMsg('headline_sample'),
1635                                         'tip'   =>      wfMsg('headline_tip'),
1636                                         'key'   =>      'H'
1637                                 ),
1638                         array(  'image'=>'button_image.png',
1639                                         'open'  =>      '[['.$wgContLang->getNsText(NS_IMAGE).":",
1640                                         'close' =>      ']]',
1641                                         'sample'=>      wfMsg('image_sample'),
1642                                         'tip'   =>      wfMsg('image_tip'),
1643                                         'key'   =>      'D'
1644                                 ),
1645                         array(  'image' =>'button_media.png',
1646                                         'open'  =>      '[['.$wgContLang->getNsText(NS_MEDIA).':',
1647                                         'close' =>      ']]',
1648                                         'sample'=>      wfMsg('media_sample'),
1649                                         'tip'   =>      wfMsg('media_tip'),
1650                                         'key'   =>      'M'
1651                                 ),
1652                         array(  'image' =>'button_math.png',
1653                                         'open'  =>      "<math>",
1654                                         'close' =>      "<\\/math>",
1655                                         'sample'=>      wfMsg('math_sample'),
1656                                         'tip'   =>      wfMsg('math_tip'),
1657                                         'key'   =>      'C'
1658                                 ),
1659                         array(  'image' =>'button_nowiki.png',
1660                                         'open'  =>      "<nowiki>",
1661                                         'close' =>      "<\\/nowiki>",
1662                                         'sample'=>      wfMsg('nowiki_sample'),
1663                                         'tip'   =>      wfMsg('nowiki_tip'),
1664                                         'key'   =>      'N'
1665                                 ),
1666                         array(  'image' =>'button_sig.png',
1667                                         'open'  =>      '--~~~~',
1668                                         'close' =>      '',
1669                                         'sample'=>      '',
1670                                         'tip'   =>      wfMsg('sig_tip'),
1671                                         'key'   =>      'Y'
1672                                 ),
1673                         array(  'image' =>'button_hr.png',
1674                                         'open'  =>      "\\n----\\n",
1675                                         'close' =>      '',
1676                                         'sample'=>      '',
1677                                         'tip'   =>      wfMsg('hr_tip'),
1678                                         'key'   =>      'R'
1679                                 )
1680                 );
1681                 $toolbar = "<div id='toolbar'>\n";
1682                 $toolbar.="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
1683
1684                 foreach($toolarray as $tool) {
1685
1686                         $image=$wgStylePath.'/common/images/'.$tool['image'];
1687                         $open=$tool['open'];
1688                         $close=$tool['close'];
1689                         $sample = wfEscapeJsString( $tool['sample'] );
1690
1691                         // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
1692                         // Older browsers show a "speedtip" type message only for ALT.
1693                         // Ideally these should be different, realistically they
1694                         // probably don't need to be.
1695                         $tip = wfEscapeJsString( $tool['tip'] );
1696
1697                         #$key = $tool["key"];
1698
1699                         $toolbar.="addButton('$image','$tip','$open','$close','$sample');\n";
1700                 }
1701
1702                 $toolbar.="/*]]>*/\n</script>";
1703                 $toolbar.="\n</div>";
1704                 return $toolbar;
1705         }
1706
1707         /**
1708          * Output preview text only. This can be sucked into the edit page
1709          * via JavaScript, and saves the server time rendering the skin as
1710          * well as theoretically being more robust on the client (doesn't
1711          * disturb the edit box's undo history, won't eat your text on
1712          * failure, etc).
1713          *
1714          * @todo This doesn't include category or interlanguage links.
1715          *       Would need to enhance it a bit, maybe wrap them in XML
1716          *       or something... that might also require more skin
1717          *       initialization, so check whether that's a problem.
1718          */
1719         function livePreview() {
1720                 global $wgOut;
1721                 $wgOut->disable();
1722                 header( 'Content-type: text/xml' );
1723                 header( 'Cache-control: no-cache' );
1724                 # FIXME
1725                 echo $this->getPreviewText( );
1726                 /* To not shake screen up and down between preview and live-preview */
1727                 echo "<br style=\"clear:both;\" />\n";
1728         }
1729
1730
1731         /**
1732          * Get a diff between the current contents of the edit box and the
1733          * version of the page we're editing from.
1734          *
1735          * If this is a section edit, we'll replace the section as for final
1736          * save and then make a comparison.
1737          *
1738          * @return string HTML
1739          */
1740         function getDiff() {
1741                 $oldtext = $this->mArticle->fetchContent();
1742                 $newtext = $this->mArticle->replaceSection(
1743                         $this->section, $this->textbox1, $this->summary, $this->edittime );
1744                 $newtext = $this->mArticle->preSaveTransform( $newtext );
1745                 $oldtitle = wfMsgExt( 'currentrev', array('parseinline') );
1746                 $newtitle = wfMsgExt( 'yourtext', array('parseinline') );
1747                 if ( $oldtext !== false  || $newtext != '' ) {
1748                         $de = new DifferenceEngine( $this->mTitle );
1749                         $de->setText( $oldtext, $newtext );
1750                         $difftext = $de->getDiff( $oldtitle, $newtitle );
1751                 } else {
1752                         $difftext = '';
1753                 }
1754
1755                 return '<div id="wikiDiff">' . $difftext . '</div>';
1756         }
1757
1758         /**
1759          * Filter an input field through a Unicode de-armoring process if it
1760          * came from an old browser with known broken Unicode editing issues.
1761          *
1762          * @param WebRequest $request
1763          * @param string $field
1764          * @return string
1765          * @private
1766          */
1767         function safeUnicodeInput( $request, $field ) {
1768                 $text = rtrim( $request->getText( $field ) );
1769                 return $request->getBool( 'safemode' )
1770                         ? $this->unmakesafe( $text )
1771                         : $text;
1772         }
1773
1774         /**
1775          * Filter an output field through a Unicode armoring process if it is
1776          * going to an old browser with known broken Unicode editing issues.
1777          *
1778          * @param string $text
1779          * @return string
1780          * @private
1781          */
1782         function safeUnicodeOutput( $text ) {
1783                 global $wgContLang;
1784                 $codedText = $wgContLang->recodeForEdit( $text );
1785                 return $this->checkUnicodeCompliantBrowser()
1786                         ? $codedText
1787                         : $this->makesafe( $codedText );
1788         }
1789
1790         /**
1791          * A number of web browsers are known to corrupt non-ASCII characters
1792          * in a UTF-8 text editing environment. To protect against this,
1793          * detected browsers will be served an armored version of the text,
1794          * with non-ASCII chars converted to numeric HTML character references.
1795          *
1796          * Preexisting such character references will have a 0 added to them
1797          * to ensure that round-trips do not alter the original data.
1798          *
1799          * @param string $invalue
1800          * @return string
1801          * @private
1802          */
1803         function makesafe( $invalue ) {
1804                 // Armor existing references for reversability.
1805                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
1806
1807                 $bytesleft = 0;
1808                 $result = "";
1809                 $working = 0;
1810                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1811                         $bytevalue = ord( $invalue{$i} );
1812                         if( $bytevalue <= 0x7F ) { //0xxx xxxx
1813                                 $result .= chr( $bytevalue );
1814                                 $bytesleft = 0;
1815                         } elseif( $bytevalue <= 0xBF ) { //10xx xxxx
1816                                 $working = $working << 6;
1817                                 $working += ($bytevalue & 0x3F);
1818                                 $bytesleft--;
1819                                 if( $bytesleft <= 0 ) {
1820                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
1821                                 }
1822                         } elseif( $bytevalue <= 0xDF ) { //110x xxxx
1823                                 $working = $bytevalue & 0x1F;
1824                                 $bytesleft = 1;
1825                         } elseif( $bytevalue <= 0xEF ) { //1110 xxxx
1826                                 $working = $bytevalue & 0x0F;
1827                                 $bytesleft = 2;
1828                         } else { //1111 0xxx
1829                                 $working = $bytevalue & 0x07;
1830                                 $bytesleft = 3;
1831                         }
1832                 }
1833                 return $result;
1834         }
1835
1836         /**
1837          * Reverse the previously applied transliteration of non-ASCII characters
1838          * back to UTF-8. Used to protect data from corruption by broken web browsers
1839          * as listed in $wgBrowserBlackList.
1840          *
1841          * @param string $invalue
1842          * @return string
1843          * @private
1844          */
1845         function unmakesafe( $invalue ) {
1846                 $result = "";
1847                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1848                         if( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
1849                                 $i += 3;
1850                                 $hexstring = "";
1851                                 do {
1852                                         $hexstring .= $invalue{$i};
1853                                         $i++;
1854                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
1855
1856                                 // Do some sanity checks. These aren't needed for reversability,
1857                                 // but should help keep the breakage down if the editor
1858                                 // breaks one of the entities whilst editing.
1859                                 if ((substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6)) {
1860                                         $codepoint = hexdec($hexstring);
1861                                         $result .= codepointToUtf8( $codepoint );
1862                                 } else {
1863                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
1864                                 }
1865                         } else {
1866                                 $result .= substr( $invalue, $i, 1 );
1867                         }
1868                 }
1869                 // reverse the transform that we made for reversability reasons.
1870                 return strtr( $result, array( "&#x0" => "&#x" ) );
1871         }
1872
1873         function noCreatePermission() {
1874                 global $wgOut;
1875                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
1876                 $wgOut->addWikiText( wfMsg( 'nocreatetext' ) );
1877         }
1878
1879 }
1880
1881 ?>