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         var $mPreviewTemplates;
  36
  37         # Form values
  38         var $save = false, $preview = false, $diff = false;
  39         var $minoredit = false, $watchthis = false, $recreate = false;
  40         var $textbox1 = '', $textbox2 = '', $summary = '';
  41         var $edittime = '', $section = '', $starttime = '';
  42         var $oldid = 0, $editintro = '', $scrolltop = null;
  43
  44         # Placeholders for text injection by hooks (must be HTML)
  45         # extensions should take care to _append_ to the present value
  46         var $editFormTextTop;
  47         var $editFormTextAfterWarn;
  48         var $editFormTextAfterTools;
  49         var $editFormTextBottom;
  50
  51         /**
  52          * @todo document
  53          * @param $article
  54          */
  55         function EditPage( $article ) {
  56                 $this->mArticle =& $article;
  57                 global $wgTitle;
  58                 $this->mTitle =& $wgTitle;
  59
  60                 # Placeholders for text injection by hooks (empty per default)
  61                 $this->editFormTextTop = "";
  62                 $this->editFormTextAfterWarn = "";
  63                 $this->editFormTextAfterTools = "";
  64                 $this->editFormTextBottom = "";
  65         }
  66
  67         /**
  68          * Fetch initial editing page content.
  69          */
  70         private function getContent() {
  71                 global $wgRequest, $wgParser;
  72
  73                 # Get variables from query string :P
  74                 $section = $wgRequest->getVal( 'section' );
  75                 $preload = $wgRequest->getVal( 'preload' );
  76
  77                 wfProfileIn( __METHOD__ );
  78
  79                 $text = '';
  80                 if( !$this->mTitle->exists() ) {
  81
  82                         # If requested, preload some text.
  83                         $text = $this->getPreloadedText( $preload );
  84
  85                         # We used to put MediaWiki:Newarticletext here if
  86                         # $text was empty at this point.
  87                         # This is now shown above the edit box instead.
  88                 } else {
  89                         // FIXME: may be better to use Revision class directly
  90                         // But don't mess with it just yet. Article knows how to
  91                         // fetch the page record from the high-priority server,
  92                         // which is needed to guarantee we don't pick up lagged
  93                         // information.
  94
  95                         $text = $this->mArticle->getContent();
  96
  97                         if( $section != '' ) {
  98                                 if( $section == 'new' ) {
  99                                         $text = $this->getPreloadedText( $preload );
 100                                 } else {
 101                                         $text = $wgParser->getSection( $text, $section );
 102                                 }
 103                         }
 104                 }
 105
 106                 wfProfileOut( __METHOD__ );
 107                 return $text;
 108         }
 109
 110         /**
 111          * Get the contents of a page from its title and remove includeonly tags
 112          *
 113          * @param $preload String: the title of the page.
 114          * @return string The contents of the page.
 115          */
 116         private function getPreloadedText($preload) {
 117                 if ( $preload === '' )
 118                         return '';
 119                 else {
 120                         $preloadTitle = Title::newFromText( $preload );
 121                         if ( isset( $preloadTitle ) && $preloadTitle->userCanRead() ) {
 122                                 $rev=Revision::newFromTitle($preloadTitle);
 123                                 if ( is_object( $rev ) ) {
 124                                         $text = $rev->getText();
 125                                         // TODO FIXME: AAAAAAAAAAA, this shouldn't be implementing
 126                                         // its own mini-parser! -ævar
 127                                         $text = preg_replace( '~</?includeonly>~', '', $text );
 128                                         return $text;
 129                                 } else
 130                                         return '';
 131                         }
 132                 }
 133         }
 134
 135         /**
 136          * This is the function that extracts metadata from the article body on the first view.
 137          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
 138          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
 139          */
 140         function extractMetaDataFromArticle () {
 141                 global $wgUseMetadataEdit , $wgMetadataWhitelist , $wgLang ;
 142                 $this->mMetaData = '' ;
 143                 if ( !$wgUseMetadataEdit ) return ;
 144                 if ( $wgMetadataWhitelist == '' ) return ;
 145                 $s = '' ;
 146                 $t = $this->getContent();
 147
 148                 # MISSING : <nowiki> filtering
 149
 150                 # Categories and language links
 151                 $t = explode ( "\n" , $t ) ;
 152                 $catlow = strtolower ( $wgLang->getNsText ( NS_CATEGORY ) ) ;
 153                 $cat = $ll = array() ;
 154                 foreach ( $t AS $key => $x )
 155                 {
 156                         $y = trim ( strtolower ( $x ) ) ;
 157                         while ( substr ( $y , 0 , 2 ) == '[[' )
 158                         {
 159                                 $y = explode ( ']]' , trim ( $x ) ) ;
 160                                 $first = array_shift ( $y ) ;
 161                                 $first = explode ( ':' , $first ) ;
 162                                 $ns = array_shift ( $first ) ;
 163                                 $ns = trim ( str_replace ( '[' , '' , $ns ) ) ;
 164                                 if ( strlen ( $ns ) == 2 OR strtolower ( $ns ) == $catlow )
 165                                 {
 166                                         $add = '[[' . $ns . ':' . implode ( ':' , $first ) . ']]' ;
 167                                         if ( strtolower ( $ns ) == $catlow ) $cat[] = $add ;
 168                                         else $ll[] = $add ;
 169                                         $x = implode ( ']]' , $y ) ;
 170                                         $t[$key] = $x ;
 171                                         $y = trim ( strtolower ( $x ) ) ;
 172                                 }
 173                         }
 174                 }
 175                 if ( count ( $cat ) ) $s .= implode ( ' ' , $cat ) . "\n" ;
 176                 if ( count ( $ll ) ) $s .= implode ( ' ' , $ll ) . "\n" ;
 177                 $t = implode ( "\n" , $t ) ;
 178
 179                 # Load whitelist
 180                 $sat = array () ; # stand-alone-templates; must be lowercase
 181                 $wl_title = Title::newFromText ( $wgMetadataWhitelist ) ;
 182                 $wl_article = new Article ( $wl_title ) ;
 183                 $wl = explode ( "\n" , $wl_article->getContent() ) ;
 184                 foreach ( $wl AS $x )
 185                 {
 186                         $isentry = false ;
 187                         $x = trim ( $x ) ;
 188                         while ( substr ( $x , 0 , 1 ) == '*' )
 189                         {
 190                                 $isentry = true ;
 191                                 $x = trim ( substr ( $x , 1 ) ) ;
 192                         }
 193                         if ( $isentry )
 194                         {
 195                                 $sat[] = strtolower ( $x ) ;
 196                         }
 197
 198                 }
 199
 200                 # Templates, but only some
 201                 $t = explode ( '{{' , $t ) ;
 202                 $tl = array () ;
 203                 foreach ( $t AS $key => $x )
 204                 {
 205                         $y = explode ( '}}' , $x , 2 ) ;
 206                         if ( count ( $y ) == 2 )
 207                         {
 208                                 $z = $y[0] ;
 209                                 $z = explode ( '|' , $z ) ;
 210                                 $tn = array_shift ( $z ) ;
 211                                 if ( in_array ( strtolower ( $tn ) , $sat ) )
 212                                 {
 213                                         $tl[] = '{{' . $y[0] . '}}' ;
 214                                         $t[$key] = $y[1] ;
 215                                         $y = explode ( '}}' , $y[1] , 2 ) ;
 216                                 }
 217                                 else $t[$key] = '{{' . $x ;
 218                         }
 219                         else if ( $key != 0 ) $t[$key] = '{{' . $x ;
 220                         else $t[$key] = $x ;
 221                 }
 222                 if ( count ( $tl ) ) $s .= implode ( ' ' , $tl ) ;
 223                 $t = implode ( '' , $t ) ;
 224
 225                 $t = str_replace ( "\n\n\n" , "\n" , $t ) ;
 226                 $this->mArticle->mContent = $t ;
 227                 $this->mMetaData = $s ;
 228         }
 229
 230         function submit() {
 231                 $this->edit();
 232         }
 233
 234         /**
 235          * This is the function that gets called for "action=edit". It
 236          * sets up various member variables, then passes execution to
 237          * another function, usually showEditForm()
 238          *
 239          * The edit form is self-submitting, so that when things like
 240          * preview and edit conflicts occur, we get the same form back
 241          * with the extra stuff added.  Only when the final submission
 242          * is made and all is well do we actually save and redirect to
 243          * the newly-edited page.
 244          */
 245         function edit() {
 246                 global $wgOut, $wgUser, $wgRequest, $wgTitle;
 247                 global $wgEmailConfirmToEdit;
 248
 249                 if ( ! wfRunHooks( 'AlternateEdit', array( &$this  ) ) )
 250                         return;
 251
 252                 $fname = 'EditPage::edit';
 253                 wfProfileIn( $fname );
 254                 wfDebug( "$fname: enter\n" );
 255
 256                 // this is not an article
 257                 $wgOut->setArticleFlag(false);
 258
 259                 $this->importFormData( $wgRequest );
 260                 $this->firsttime = false;
 261
 262                 if( $this->live ) {
 263                         $this->livePreview();
 264                         wfProfileOut( $fname );
 265                         return;
 266                 }
 267
 268                 if ( ! $this->mTitle->userCanEdit() ) {
 269                         wfDebug( "$fname: user can't edit\n" );
 270                         $wgOut->readOnlyPage( $this->getContent(), true );
 271                         wfProfileOut( $fname );
 272                         return;
 273                 }
 274                 wfDebug( "$fname: Checking blocks\n" );
 275                 if ( !$this->preview && !$this->diff && $wgUser->isBlockedFrom( $this->mTitle, !$this->save ) ) {
 276                         # When previewing, don't check blocked state - will get caught at save time.
 277                         # Also, check when starting edition is done against slave to improve performance.
 278                         wfDebug( "$fname: user is blocked\n" );
 279                         $this->blockedPage();
 280                         wfProfileOut( $fname );
 281                         return;
 282                 }
 283                 if ( !$wgUser->isAllowed('edit') ) {
 284                         if ( $wgUser->isAnon() ) {
 285                                 wfDebug( "$fname: user must log in\n" );
 286                                 $this->userNotLoggedInPage();
 287                                 wfProfileOut( $fname );
 288                                 return;
 289                         } else {
 290                                 wfDebug( "$fname: read-only page\n" );
 291                                 $wgOut->readOnlyPage( $this->getContent(), true );
 292                                 wfProfileOut( $fname );
 293                                 return;
 294                         }
 295                 }
 296                 if ($wgEmailConfirmToEdit && !$wgUser->isEmailConfirmed()) {
 297                         wfDebug("$fname: user must confirm e-mail address\n");
 298                         $this->userNotConfirmedPage();
 299                         wfProfileOut($fname);
 300                         return;
 301                 }
 302                 if ( !$this->mTitle->userCanCreate() && !$this->mTitle->exists() ) {
 303                         wfDebug( "$fname: no create permission\n" );
 304                         $this->noCreatePermission();
 305                         wfProfileOut( $fname );
 306                         return;
 307                 }
 308                 if ( wfReadOnly() ) {
 309                         wfDebug( "$fname: read-only mode is engaged\n" );
 310                         if( $this->save || $this->preview ) {
 311                                 $this->formtype = 'preview';
 312                         } else if ( $this->diff ) {
 313                                 $this->formtype = 'diff';
 314                         } else {
 315                                 $wgOut->readOnlyPage( $this->getContent() );
 316                                 wfProfileOut( $fname );
 317                                 return;
 318                         }
 319                 } else {
 320                         if ( $this->save ) {
 321                                 $this->formtype = 'save';
 322                         } else if ( $this->preview ) {
 323                                 $this->formtype = 'preview';
 324                         } else if ( $this->diff ) {
 325                                 $this->formtype = 'diff';
 326                         } else { # First time through
 327                                 $this->firsttime = true;
 328                                 if( $this->previewOnOpen() ) {
 329                                         $this->formtype = 'preview';
 330                                 } else {
 331                                         $this->extractMetaDataFromArticle () ;
 332                                         $this->formtype = 'initial';
 333                                 }
 334                         }
 335                 }
 336
 337                 wfProfileIn( "$fname-business-end" );
 338
 339                 $this->isConflict = false;
 340                 // css / js subpages of user pages get a special treatment
 341                 $this->isCssJsSubpage      = $wgTitle->isCssJsSubpage();
 342                 $this->isValidCssJsSubpage = $wgTitle->isValidCssJsSubpage();
 343
 344                 /* Notice that we can't use isDeleted, because it returns true if article is ever deleted
 345                  * no matter it's current state
 346                  */
 347                 $this->deletedSinceEdit = false;
 348                 if ( $this->edittime != '' ) {
 349                         /* Note that we rely on logging table, which hasn't been always there,
 350                          * but that doesn't matter, because this only applies to brand new
 351                          * deletes. This is done on every preview and save request. Move it further down
 352                          * to only perform it on saves
 353                          */
 354                         if ( $this->mTitle->isDeleted() ) {
 355                                 $this->lastDelete = $this->getLastDelete();
 356                                 if ( !is_null($this->lastDelete) ) {
 357                                         $deletetime = $this->lastDelete->log_timestamp;
 358                                         if ( ($deletetime - $this->starttime) > 0 ) {
 359                                                 $this->deletedSinceEdit = true;
 360                                         }
 361                                 }
 362                         }
 363                 }
 364
 365                 if(!$this->mTitle->getArticleID() && ('initial' == $this->formtype || $this->firsttime )) { # new article
 366                         $this->showIntro();
 367                 }
 368                 if( $this->mTitle->isTalkPage() ) {
 369                         $wgOut->addWikiText( wfMsg( 'talkpagetext' ) );
 370                 }
 371
 372                 # Attempt submission here.  This will check for edit conflicts,
 373                 # and redundantly check for locked database, blocked IPs, etc.
 374                 # that edit() already checked just in case someone tries to sneak
 375                 # in the back door with a hand-edited submission URL.
 376
 377                 if ( 'save' == $this->formtype ) {
 378                         if ( !$this->attemptSave() ) {
 379                                 wfProfileOut( "$fname-business-end" );
 380                                 wfProfileOut( $fname );
 381                                 return;
 382                         }
 383                 }
 384
 385                 # First time through: get contents, set time for conflict
 386                 # checking, etc.
 387                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 388                         $this->initialiseForm();
 389                         if( !$this->mTitle->getArticleId() )
 390                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 391                 }
 392
 393                 $this->showEditForm();
 394                 wfProfileOut( "$fname-business-end" );
 395                 wfProfileOut( $fname );
 396         }
 397
 398         /**
 399          * Return true if this page should be previewed when the edit form
 400          * is initially opened.
 401          * @return bool
 402          * @private
 403          */
 404         function previewOnOpen() {
 405                 global $wgUser;
 406                 return $this->section != 'new' &&
 407                         ( ( $wgUser->getOption( 'previewonfirst' ) && $this->mTitle->exists() ) ||
 408                                 ( $this->mTitle->getNamespace() == NS_CATEGORY &&
 409                                         !$this->mTitle->exists() ) );
 410         }
 411
 412         /**
 413          * @todo document
 414          * @param $request
 415          */
 416         function importFormData( &$request ) {
 417                 global $wgLang, $wgUser;
 418                 $fname = 'EditPage::importFormData';
 419                 wfProfileIn( $fname );
 420
 421                 if( $request->wasPosted() ) {
 422                         # These fields need to be checked for encoding.
 423                         # Also remove trailing whitespace, but don't remove _initial_
 424                         # whitespace from the text boxes. This may be significant formatting.
 425                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 426                         $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
 427                         $this->mMetaData = rtrim( $request->getText( 'metadata'   ) );
 428                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 429                         $this->summary   = $wgLang->truncate( $request->getText( 'wpSummary'  ), 250 );
 430
 431                         $this->edittime = $request->getVal( 'wpEdittime' );
 432                         $this->starttime = $request->getVal( 'wpStarttime' );
 433
 434                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 435
 436                         if( is_null( $this->edittime ) ) {
 437                                 # If the form is incomplete, force to preview.
 438                                 wfDebug( "$fname: Form data appears to be incomplete\n" );
 439                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 440                                 $this->preview  = true;
 441                         } else {
 442                                 /* Fallback for live preview */
 443                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 444                                 $this->diff = $request->getCheck( 'wpDiff' );
 445
 446                                 // Remember whether a save was requested, so we can indicate
 447                                 // if we forced preview due to session failure.
 448                                 $this->mTriedSave = !$this->preview;
 449
 450                                 if ( $this->tokenOk( $request ) ) {
 451                                         # Some browsers will not report any submit button
 452                                         # if the user hits enter in the comment box.
 453                                         # The unmarked state will be assumed to be a save,
 454                                         # if the form seems otherwise complete.
 455                                         wfDebug( "$fname: Passed token check.\n" );
 456                                 } else if ( $this->diff ) {
 457                                         # Failed token check, but only requested "Show Changes".
 458                                         wfDebug( "$fname: Failed token check; Show Changes requested.\n" );
 459                                 } else {
 460                                         # Page might be a hack attempt posted from
 461                                         # an external site. Preview instead of saving.
 462                                         wfDebug( "$fname: Failed token check; forcing preview\n" );
 463                                         $this->preview = true;
 464                                 }
 465                         }
 466                         $this->save    = ! ( $this->preview OR $this->diff );
 467                         if( !preg_match( '/^\d{14}$/', $this->edittime )) {
 468                                 $this->edittime = null;
 469                         }
 470
 471                         if( !preg_match( '/^\d{14}$/', $this->starttime )) {
 472                                 $this->starttime = null;
 473                         }
 474
 475                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 476
 477                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 478                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 479
 480                         # Don't force edit summaries when a user is editing their own user or talk page
 481                         if( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) && $this->mTitle->getText() == $wgUser->getName() ) {
 482                                 $this->allowBlankSummary = true;
 483                         } else {
 484                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' );
 485                         }
 486
 487                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 488                 } else {
 489                         # Not a posted form? Start with nothing.
 490                         wfDebug( "$fname: Not a posted form.\n" );
 491                         $this->textbox1  = '';
 492                         $this->textbox2  = '';
 493                         $this->mMetaData = '';
 494                         $this->summary   = '';
 495                         $this->edittime  = '';
 496                         $this->starttime = wfTimestampNow();
 497                         $this->preview   = false;
 498                         $this->save      = false;
 499                         $this->diff      = false;
 500                         $this->minoredit = false;
 501                         $this->watchthis = false;
 502                         $this->recreate  = false;
 503                 }
 504
 505                 $this->oldid = $request->getInt( 'oldid' );
 506
 507                 # Section edit can come from either the form or a link
 508                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 509
 510                 $this->live = $request->getCheck( 'live' );
 511                 $this->editintro = $request->getText( 'editintro' );
 512
 513                 wfProfileOut( $fname );
 514         }
 515
 516         /**
 517          * Make sure the form isn't faking a user's credentials.
 518          *
 519          * @param $request WebRequest
 520          * @return bool
 521          * @private
 522          */
 523         function tokenOk( &$request ) {
 524                 global $wgUser;
 525                 if( $wgUser->isAnon() ) {
 526                         # Anonymous users may not have a session
 527                         # open. Don't tokenize.
 528                         $this->mTokenOk = true;
 529                 } else {
 530                         $this->mTokenOk = $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
 531                 }
 532                 return $this->mTokenOk;
 533         }
 534
 535         /** */
 536         function showIntro() {
 537                 global $wgOut, $wgUser;
 538                 $addstandardintro=true;
 539                 if($this->editintro) {
 540                         $introtitle=Title::newFromText($this->editintro);
 541                         if(isset($introtitle) && $introtitle->userCanRead()) {
 542                                 $rev=Revision::newFromTitle($introtitle);
 543                                 if($rev) {
 544                                         $wgOut->addSecondaryWikiText($rev->getText());
 545                                         $addstandardintro=false;
 546                                 }
 547                         }
 548                 }
 549                 if($addstandardintro) {
 550                         if ( $wgUser->isLoggedIn() )
 551                                 $wgOut->addWikiText( wfMsg( 'newarticletext' ) );
 552                         else
 553                                 $wgOut->addWikiText( wfMsg( 'newarticletextanon' ) );
 554                 }
 555         }
 556
 557         /**
 558          * Attempt submission
 559          * @return bool false if output is done, true if the rest of the form should be displayed
 560          */
 561         function attemptSave() {
 562                 global $wgSpamRegex, $wgFilterCallback, $wgUser, $wgOut;
 563                 global $wgMaxArticleSize;
 564
 565                 $fname = 'EditPage::attemptSave';
 566                 wfProfileIn( $fname );
 567                 wfProfileIn( "$fname-checks" );
 568
 569                 # Reintegrate metadata
 570                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 571                 $this->mMetaData = '' ;
 572
 573                 # Check for spam
 574                 if ( $wgSpamRegex && preg_match( $wgSpamRegex, $this->textbox1, $matches ) ) {
 575                         $this->spamPage ( $matches[0] );
 576                         wfProfileOut( "$fname-checks" );
 577                         wfProfileOut( $fname );
 578                         return false;
 579                 }
 580                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section ) ) {
 581                         # Error messages or other handling should be performed by the filter function
 582                         wfProfileOut( $fname );
 583                         wfProfileOut( "$fname-checks" );
 584                         return false;
 585                 }
 586                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError ) ) ) {
 587                         # Error messages etc. could be handled within the hook...
 588                         wfProfileOut( $fname );
 589                         wfProfileOut( "$fname-checks" );
 590                         return false;
 591                 } elseif( $this->hookError != '' ) {
 592                         # ...or the hook could be expecting us to produce an error
 593                         wfProfileOut( "$fname-checks " );
 594                         wfProfileOut( $fname );
 595                         return true;
 596                 }
 597                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 598                         # Check block state against master, thus 'false'.
 599                         $this->blockedPage();
 600                         wfProfileOut( "$fname-checks" );
 601                         wfProfileOut( $fname );
 602                         return false;
 603                 }
 604                 $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 605                 if ( $this->kblength > $wgMaxArticleSize ) {
 606                         // Error will be displayed by showEditForm()
 607                         $this->tooBig = true;
 608                         wfProfileOut( "$fname-checks" );
 609                         wfProfileOut( $fname );
 610                         return true;
 611                 }
 612
 613                 if ( !$wgUser->isAllowed('edit') ) {
 614                         if ( $wgUser->isAnon() ) {
 615                                 $this->userNotLoggedInPage();
 616                                 wfProfileOut( "$fname-checks" );
 617                                 wfProfileOut( $fname );
 618                                 return false;
 619                         }
 620                         else {
 621                                 $wgOut->readOnlyPage();
 622                                 wfProfileOut( "$fname-checks" );
 623                                 wfProfileOut( $fname );
 624                                 return false;
 625                         }
 626                 }
 627
 628                 if ( wfReadOnly() ) {
 629                         $wgOut->readOnlyPage();
 630                         wfProfileOut( "$fname-checks" );
 631                         wfProfileOut( $fname );
 632                         return false;
 633                 }
 634                 if ( $wgUser->pingLimiter() ) {
 635                         $wgOut->rateLimited();
 636                         wfProfileOut( "$fname-checks" );
 637                         wfProfileOut( $fname );
 638                         return false;
 639                 }
 640
 641                 # If the article has been deleted while editing, don't save it without
 642                 # confirmation
 643                 if ( $this->deletedSinceEdit && !$this->recreate ) {
 644                         wfProfileOut( "$fname-checks" );
 645                         wfProfileOut( $fname );
 646                         return true;
 647                 }
 648
 649                 wfProfileOut( "$fname-checks" );
 650
 651                 # If article is new, insert it.
 652                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 653                 if ( 0 == $aid ) {
 654                         // Late check for create permission, just in case *PARANOIA*
 655                         if ( !$this->mTitle->userCanCreate() ) {
 656                                 wfDebug( "$fname: no create permission\n" );
 657                                 $this->noCreatePermission();
 658                                 wfProfileOut( $fname );
 659                                 return;
 660                         }
 661
 662                         # Don't save a new article if it's blank.
 663                         if ( ( '' == $this->textbox1 ) ) {
 664                                         $wgOut->redirect( $this->mTitle->getFullURL() );
 665                                         wfProfileOut( $fname );
 666                                         return false;
 667                         }
 668
 669                         $isComment=($this->section=='new');
 670                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 671                                 $this->minoredit, $this->watchthis, false, $isComment);
 672
 673                         wfProfileOut( $fname );
 674                         return false;
 675                 }
 676
 677                 # Article exists. Check for edit conflict.
 678
 679                 $this->mArticle->clear(); # Force reload of dates, etc.
 680                 $this->mArticle->forUpdate( true ); # Lock the article
 681
 682                 if( $this->mArticle->getTimestamp() != $this->edittime ) {
 683                         $this->isConflict = true;
 684                         if( $this->section == 'new' ) {
 685                                 if( $this->mArticle->getUserText() == $wgUser->getName() &&
 686                                         $this->mArticle->getComment() == $this->summary ) {
 687                                         // Probably a duplicate submission of a new comment.
 688                                         // This can happen when squid resends a request after
 689                                         // a timeout but the first one actually went through.
 690                                         wfDebug( "EditPage::editForm duplicate new section submission; trigger edit conflict!\n" );
 691                                 } else {
 692                                         // New comment; suppress conflict.
 693                                         $this->isConflict = false;
 694                                         wfDebug( "EditPage::editForm conflict suppressed; new section\n" );
 695                                 }
 696                         }
 697                 }
 698                 $userid = $wgUser->getID();
 699
 700                 if ( $this->isConflict) {
 701                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 702                                 $this->mArticle->getTimestamp() . "'\n" );
 703                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime);
 704                 }
 705                 else {
 706                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 707                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary);
 708                 }
 709                 if( is_null( $text ) ) {
 710                         wfDebug( "EditPage::editForm activating conflict; section replace failed.\n" );
 711                         $this->isConflict = true;
 712                         $text = $this->textbox1;
 713                 }
 714
 715                 # Suppress edit conflict with self, except for section edits where merging is required.
 716                 if ( ( $this->section == '' ) && ( 0 != $userid ) && ( $this->mArticle->getUser() == $userid ) ) {
 717                         wfDebug( "Suppressing edit conflict, same user.\n" );
 718                         $this->isConflict = false;
 719                 } else {
 720                         # switch from section editing to normal editing in edit conflict
 721                         if($this->isConflict) {
 722                                 # Attempt merge
 723                                 if( $this->mergeChangesInto( $text ) ){
 724                                         // Successful merge! Maybe we should tell the user the good news?
 725                                         $this->isConflict = false;
 726                                         wfDebug( "Suppressing edit conflict, successful merge.\n" );
 727                                 } else {
 728                                         $this->section = '';
 729                                         $this->textbox1 = $text;
 730                                         wfDebug( "Keeping edit conflict, failed merge.\n" );
 731                                 }
 732                         }
 733                 }
 734
 735                 if ( $this->isConflict ) {
 736                         wfProfileOut( $fname );
 737                         return true;
 738                 }
 739
 740                 $oldtext = $this->mArticle->getContent();
 741
 742                 # Handle the user preference to force summaries here, but not for null edits
 743                 if( $this->section != 'new' && !$this->allowBlankSummary && $wgUser->getOption( 'forceeditsummary')
 744                         &&  0 != strcmp($oldtext, $text) && !Article::getRedirectAutosummary( $text )) {
 745                         if( md5( $this->summary ) == $this->autoSumm ) {
 746                                 $this->missingSummary = true;
 747                                 wfProfileOut( $fname );
 748                                 return( true );
 749                         }
 750                 }
 751
 752                 #And a similar thing for new sections
 753                 if( $this->section == 'new' && !$this->allowBlankSummary && $wgUser->getOption( 'forceeditsummary' ) ) {
 754                         if (trim($this->summary) == '') {
 755                                 $this->missingSummary = true;
 756                                 wfProfileOut( $fname );
 757                                 return( true );
 758                         }
 759                 }
 760
 761                 # All's well
 762                 wfProfileIn( "$fname-sectionanchor" );
 763                 $sectionanchor = '';
 764                 if( $this->section == 'new' ) {
 765                         if ( $this->textbox1 == '' ) {
 766                                 $this->missingComment = true;
 767                                 return true;
 768                         }
 769                         if( $this->summary != '' ) {
 770                                 $sectionanchor = $this->sectionAnchor( $this->summary );
 771                         }
 772                 } elseif( $this->section != '' ) {
 773                         # Try to get a section anchor from the section source, redirect to edited section if header found
 774                         # XXX: might be better to integrate this into Article::replaceSection
 775                         # for duplicate heading checking and maybe parsing
 776                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 777                         # we can't deal with anchors, includes, html etc in the header for now,
 778                         # headline would need to be parsed to improve this
 779                         if($hasmatch and strlen($matches[2]) > 0) {
 780                                 $sectionanchor = $this->sectionAnchor( $matches[2] );
 781                         }
 782                 }
 783                 wfProfileOut( "$fname-sectionanchor" );
 784
 785                 // Save errors may fall down to the edit form, but we've now
 786                 // merged the section into full text. Clear the section field
 787                 // so that later submission of conflict forms won't try to
 788                 // replace that into a duplicated mess.
 789                 $this->textbox1 = $text;
 790                 $this->section = '';
 791
 792                 // Check for length errors again now that the section is merged in
 793                 $this->kblength = (int)(strlen( $text ) / 1024);
 794                 if ( $this->kblength > $wgMaxArticleSize ) {
 795                         $this->tooBig = true;
 796                         wfProfileOut( $fname );
 797                         return true;
 798                 }
 799
 800                 # update the article here
 801                 if( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
 802                         $this->watchthis, '', $sectionanchor ) ) {
 803                         wfProfileOut( $fname );
 804                         return false;
 805                 } else {
 806                         $this->isConflict = true;
 807                 }
 808                 wfProfileOut( $fname );
 809                 return true;
 810         }
 811
 812         /**
 813          * Initialise form fields in the object
 814          * Called on the first invocation, e.g. when a user clicks an edit link
 815          */
 816         function initialiseForm() {
 817                 $this->edittime = $this->mArticle->getTimestamp();
 818                 $this->textbox1 = $this->getContent();
 819                 $this->summary = '';
 820                 if ( !$this->mArticle->exists() && $this->mArticle->mTitle->getNamespace() == NS_MEDIAWIKI )
 821                         $this->textbox1 = wfMsgWeirdKey( $this->mArticle->mTitle->getText() ) ;
 822                 wfProxyCheck();
 823         }
 824
 825         /**
 826          * Send the edit form and related headers to $wgOut
 827          * @param $formCallback Optional callable that takes an OutputPage
 828          *                      parameter; will be called during form output
 829          *                      near the top, for captchas and the like.
 830          */
 831         function showEditForm( $formCallback=null ) {
 832                 global $wgOut, $wgUser, $wgLang, $wgContLang, $wgMaxArticleSize;
 833
 834                 $fname = 'EditPage::showEditForm';
 835                 wfProfileIn( $fname );
 836
 837                 $sk =& $wgUser->getSkin();
 838
 839                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) ) ;
 840
 841                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 842
 843                 # Enabled article-related sidebar, toplinks, etc.
 844                 $wgOut->setArticleRelated( true );
 845
 846                 if ( $this->isConflict ) {
 847                         $s = wfMsg( 'editconflict', $this->mTitle->getPrefixedText() );
 848                         $wgOut->setPageTitle( $s );
 849                         $wgOut->addWikiText( wfMsg( 'explainconflict' ) );
 850
 851                         $this->textbox2 = $this->textbox1;
 852                         $this->textbox1 = $this->getContent();
 853                         $this->edittime = $this->mArticle->getTimestamp();
 854                 } else {
 855
 856                         if( $this->section != '' ) {
 857                                 if( $this->section == 'new' ) {
 858                                         $s = wfMsg('editingcomment', $this->mTitle->getPrefixedText() );
 859                                 } else {
 860                                         $s = wfMsg('editingsection', $this->mTitle->getPrefixedText() );
 861                                         if( !$this->summary && !$this->preview && !$this->diff ) {
 862                                                 preg_match( "/^(=+)(.+)\\1/mi",
 863                                                         $this->textbox1,
 864                                                         $matches );
 865                                                 if( !empty( $matches[2] ) ) {
 866                                                         $this->summary = "/* ". trim($matches[2])." */ ";
 867                                                 }
 868                                         }
 869                                 }
 870                         } else {
 871                                 $s = wfMsg( 'editing', $this->mTitle->getPrefixedText() );
 872                         }
 873                         $wgOut->setPageTitle( $s );
 874
 875                         if ( $this->missingComment ) {
 876                                 $wgOut->addWikiText( wfMsg( 'missingcommenttext' ) );
 877                         }
 878
 879                         if( $this->missingSummary && $this->section != 'new' ) {
 880                                 $wgOut->addWikiText( wfMsg( 'missingsummary' ) );
 881                         }
 882
 883                         if( $this->missingSummary && $this->section == 'new' ) {
 884                                 $wgOut->addWikiText( wfMsg( 'missingcommentheader' ) );
 885                         }
 886
 887                         if( !$this->hookError == '' ) {
 888                                 $wgOut->addWikiText( $this->hookError );
 889                         }
 890
 891                         if ( !$this->checkUnicodeCompliantBrowser() ) {
 892                                 $wgOut->addWikiText( wfMsg( 'nonunicodebrowser') );
 893                         }
 894                         if ( isset( $this->mArticle )
 895                              && isset( $this->mArticle->mRevision )
 896                              && !$this->mArticle->mRevision->isCurrent() ) {
 897                                 $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
 898                                 $wgOut->addWikiText( wfMsg( 'editingold' ) );
 899                         }
 900                 }
 901
 902                 if( wfReadOnly() ) {
 903                         $wgOut->addWikiText( wfMsg( 'readonlywarning' ) );
 904                 } elseif( $wgUser->isAnon() && $this->formtype != 'preview' ) {
 905                         $wgOut->addWikiText( wfMsg( 'anoneditwarning' ) );
 906                 } else {
 907                         if( $this->isCssJsSubpage && $this->formtype != 'preview' ) {
 908                                 # Check the skin exists
 909                                 if( $this->isValidCssJsSubpage ) {
 910                                         $wgOut->addWikiText( wfMsg( 'usercssjsyoucanpreview' ) );
 911                                 } else {
 912                                         $wgOut->addWikiText( wfMsg( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
 913                                 }
 914                         }
 915                 }
 916
 917                 if( $this->mTitle->isProtected( 'edit' ) ) {
 918                         # Is the protection due to the namespace, e.g. interface text?
 919                         if( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 920                                 # Yes; remind the user
 921                                 $notice = wfMsg( 'editinginterface' );
 922                         } elseif( $this->mTitle->isSemiProtected() ) {
 923                                 # No; semi protected
 924                                 $notice = wfMsg( 'semiprotectedpagewarning' );
 925                                 if( wfEmptyMsg( 'semiprotectedpagewarning', $notice ) || $notice == '-' ) {
 926                                         $notice = '';
 927                                 }
 928                         } else {
 929                                 # No; regular protection
 930                                 $notice = wfMsg( 'protectedpagewarning' );
 931                         }
 932                         $wgOut->addWikiText( $notice );
 933                 }
 934
 935                 if ( $this->kblength === false ) {
 936                         $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 937                 }
 938                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
 939                         $wgOut->addWikiText( wfMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgMaxArticleSize ) );
 940                 } elseif( $this->kblength > 29 ) {
 941                         $wgOut->addWikiText( wfMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) ) );
 942                 }
 943
 944                 #need to parse the preview early so that we know which templates are used,
 945                 #otherwise users with "show preview after edit box" will get a blank list
 946                 $previewOutput = $this->getPreviewText();
 947
 948                 $rows = $wgUser->getIntOption( 'rows' );
 949                 $cols = $wgUser->getIntOption( 'cols' );
 950
 951                 $ew = $wgUser->getOption( 'editwidth' );
 952                 if ( $ew ) $ew = " style=\"width:100%\"";
 953                 else $ew = '';
 954
 955                 $q = 'action=submit';
 956                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
 957                 $action = $this->mTitle->escapeLocalURL( $q );
 958
 959                 $summary = wfMsg('summary');
 960                 $subject = wfMsg('subject');
 961                 $minor   = wfMsgExt('minoredit', array('parseinline'));
 962                 $watchthis = wfMsgExt('watchthis', array('parseinline'));
 963
 964                 $cancel = $sk->makeKnownLink( $this->mTitle->getPrefixedText(),
 965                                 wfMsgExt('cancel', array('parseinline')) );
 966                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ));
 967                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
 968                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
 969                         htmlspecialchars( wfMsg( 'newwindow' ) );
 970
 971                 global $wgRightsText;
 972                 $copywarn = "<div id=\"editpage-copywarn\">\n" .
 973                         wfMsg( $wgRightsText ? 'copyrightwarning' : 'copyrightwarning2',
 974                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
 975                                 $wgRightsText ) . "\n</div>";
 976
 977                 if( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
 978                         # prepare toolbar for edit buttons
 979                         $toolbar = $this->getEditToolbar();
 980                 } else {
 981                         $toolbar = '';
 982                 }
 983
 984                 // activate checkboxes if user wants them to be always active
 985                 if( !$this->preview && !$this->diff ) {
 986                         # Sort out the "watch" checkbox
 987                         if( $wgUser->getOption( 'watchdefault' ) ) {
 988                                 # Watch all edits
 989                                 $this->watchthis = true;
 990                         } elseif( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 991                                 # Watch creations
 992                                 $this->watchthis = true;
 993                         } elseif( $this->mTitle->userIsWatching() ) {
 994                                 # Already watched
 995                                 $this->watchthis = true;
 996                         }
 997
 998                         if( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
 999                 }
1000
1001                 $minoredithtml = '';
1002
1003                 if ( $wgUser->isAllowed('minoredit') ) {
1004                         $minoredithtml =
1005                                 "<input tabindex='3' type='checkbox' value='1' name='wpMinoredit'".($this->minoredit?" checked='checked'":"").
1006                                 " accesskey='".wfMsg('accesskey-minoredit')."' id='wpMinoredit' />\n".
1007                                 "<label for='wpMinoredit' title='".wfMsg('tooltip-minoredit')."'>{$minor}</label>\n";
1008                 }
1009
1010                 $watchhtml = '';
1011
1012                 if ( $wgUser->isLoggedIn() ) {
1013                         $watchhtml = "<input tabindex='4' type='checkbox' name='wpWatchthis'".
1014                                 ($this->watchthis?" checked='checked'":"").
1015                                 " accesskey=\"".htmlspecialchars(wfMsg('accesskey-watch'))."\" id='wpWatchthis'  />\n".
1016                                 "<label for='wpWatchthis' title=\"" .
1017                                         htmlspecialchars(wfMsg('tooltip-watch'))."\">{$watchthis}</label>\n";
1018                 }
1019
1020                 $checkboxhtml = $minoredithtml . $watchhtml;
1021
1022                 if ( $wgUser->getOption( 'previewontop' ) ) {
1023
1024                         if ( 'preview' == $this->formtype ) {
1025                                 $this->showPreview( $previewOutput );
1026                         } else {
1027                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
1028                         }
1029
1030                         if ( 'diff' == $this->formtype ) {
1031                                 $wgOut->addHTML( $this->getDiff() );
1032                         }
1033                 }
1034
1035
1036                 $wgOut->addHTML( $this->editFormTextTop );
1037
1038                 # if this is a comment, show a subject line at the top, which is also the edit summary.
1039                 # Otherwise, show a summary field at the bottom
1040                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
1041                 if( $this->section == 'new' ) {
1042                         $commentsubject="<span id='wpSummaryLabel'><label for='wpSummary'>{$subject}:</label></span>\n<div class='editOptions'>\n<input tabindex='1' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
1043                         $editsummary = '';
1044                         $subjectpreview = $summarytext && $this->preview ? "<div class=\"mw-summary-preview\">".wfMsg('subject-preview').':'.$sk->commentBlock( $this->summary, $this->mTitle )."</div>\n" : '';
1045                         $summarypreview = '';
1046                 } else {
1047                         $commentsubject = '';
1048                         $editsummary="<span id='wpSummaryLabel'><label for='wpSummary'>{$summary}:</label></span>\n<div class='editOptions'>\n<input tabindex='2' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
1049                         $summarypreview = $summarytext && $this->preview ? "<div class=\"mw-summary-preview\">".wfMsg('summary-preview').':'.$sk->commentBlock( $this->summary, $this->mTitle )."</div>\n" : '';
1050                         $subjectpreview = '';
1051                 }
1052
1053                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
1054                 if( !$this->preview && !$this->diff ) {
1055                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
1056                 }
1057                 $templates = ($this->preview || $this->section) ? $this->mPreviewTemplates : $this->mArticle->getUsedTemplates();
1058                 $formattedtemplates = $sk->formatTemplates( $templates, $this->preview, $this->section != '');
1059
1060                 global $wgUseMetadataEdit ;
1061                 if ( $wgUseMetadataEdit ) {
1062                         $metadata = $this->mMetaData ;
1063                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
1064                         $top = wfMsgWikiHtml( 'metadata_help' );
1065                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
1066                 }
1067                 else $metadata = "" ;
1068
1069                 $hidden = '';
1070                 $recreate = '';
1071                 if ($this->deletedSinceEdit) {
1072                         if ( 'save' != $this->formtype ) {
1073                                 $wgOut->addWikiText( wfMsg('deletedwhileediting'));
1074                         } else {
1075                                 // Hide the toolbar and edit area, use can click preview to get it back
1076                                 // Add an confirmation checkbox and explanation.
1077                                 $toolbar = '';
1078                                 $hidden = 'type="hidden" style="display:none;"';
1079                                 $recreate = $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ));
1080                                 $recreate .=
1081                                         "<br /><input tabindex='1' type='checkbox' value='1' name='wpRecreate' id='wpRecreate' />".
1082                                         "<label for='wpRecreate' title='".wfMsg('tooltip-recreate')."'>". wfMsg('recreate')."</label>";
1083                         }
1084                 }
1085
1086                 $temp = array(
1087                         'id'        => 'wpSave',
1088                         'name'      => 'wpSave',
1089                         'type'      => 'submit',
1090                         'tabindex'  => '5',
1091                         'value'     => wfMsg('savearticle'),
1092                         'accesskey' => wfMsg('accesskey-save'),
1093                         'title'     => wfMsg('tooltip-save'),
1094                 );
1095                 $buttons['save'] = wfElement('input', $temp, '');
1096                 $temp = array(
1097                         'id'        => 'wpDiff',
1098                         'name'      => 'wpDiff',
1099                         'type'      => 'submit',
1100                         'tabindex'  => '7',
1101                         'value'     => wfMsg('showdiff'),
1102                         'accesskey' => wfMsg('accesskey-diff'),
1103                         'title'     => wfMsg('tooltip-diff'),
1104                 );
1105                 $buttons['diff'] = wfElement('input', $temp, '');
1106
1107                 global $wgLivePreview;
1108                 if ( $wgLivePreview && $wgUser->getOption( 'uselivepreview' ) ) {
1109                         $temp = array(
1110                                 'id'        => 'wpPreview',
1111                                 'name'      => 'wpPreview',
1112                                 'type'      => 'submit',
1113                                 'tabindex'  => '6',
1114                                 'value'     => wfMsg('showpreview'),
1115                                 'accesskey' => '',
1116                                 'title'     => wfMsg('tooltip-preview'),
1117                                 'style'     => 'display: none;',
1118                         );
1119                         $buttons['preview'] = wfElement('input', $temp, '');
1120                         $temp = array(
1121                                 'id'        => 'wpLivePreview',
1122                                 'name'      => 'wpLivePreview',
1123                                 'type'      => 'submit',
1124                                 'tabindex'  => '6',
1125                                 'value'     => wfMsg('showlivepreview'),
1126                                 'accesskey' => wfMsg('accesskey-preview'),
1127                                 'title'     => '',
1128                                 'onclick'   => $this->doLivePreviewScript(),
1129                         );
1130                         $buttons['live'] = wfElement('input', $temp, '');
1131                 } else {
1132                         $temp = array(
1133                                 'id'        => 'wpPreview',
1134                                 'name'      => 'wpPreview',
1135                                 'type'      => 'submit',
1136                                 'tabindex'  => '6',
1137                                 'value'     => wfMsg('showpreview'),
1138                                 'accesskey' => wfMsg('accesskey-preview'),
1139                                 'title'     => wfMsg('tooltip-preview'),
1140                         );
1141                         $buttons['preview'] = wfElement('input', $temp, '');
1142                         $buttons['live'] = '';
1143                 }
1144
1145                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
1146                         ? ""
1147                         : "<input type='hidden' name=\"safemode\" value='1' />\n";
1148
1149                 $wgOut->addHTML( <<<END
1150 {$toolbar}
1151 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1152 END
1153 );
1154
1155                 if( is_callable( $formCallback ) ) {
1156                         call_user_func_array( $formCallback, array( &$wgOut ) );
1157                 }
1158
1159                 // Put these up at the top to ensure they aren't lost on early form submission
1160                 $wgOut->addHTML( "
1161 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
1162 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
1163 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
1164 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
1165
1166                 $wgOut->addHTML( <<<END
1167 $recreate
1168 {$commentsubject}
1169 {$subjectpreview}
1170 <textarea tabindex='1' accesskey="," name="wpTextbox1" id="wpTextbox1" rows='{$rows}'
1171 cols='{$cols}'{$ew} $hidden>
1172 END
1173 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox1 ) ) .
1174 "
1175 </textarea>
1176                 " );
1177
1178                 $wgOut->addWikiText( $copywarn );
1179                 $wgOut->addHTML( $this->editFormTextAfterWarn );
1180                 $wgOut->addHTML( "
1181 {$metadata}
1182 {$editsummary}
1183 {$summarypreview}
1184 {$checkboxhtml}
1185 {$safemodehtml}
1186 ");
1187
1188                 $wgOut->addHTML(
1189 "<div class='editButtons'>
1190         {$buttons['save']}
1191         {$buttons['preview']}
1192         {$buttons['live']}
1193         {$buttons['diff']}
1194         <span class='editHelp'>{$cancel} | {$edithelp}</span>
1195 </div><!-- editButtons -->
1196 </div><!-- editOptions -->");
1197
1198                 $wgOut->addWikiText( wfMsgForContent( 'edittools' ) );
1199                 $wgOut->addHTML( $this->editFormTextAfterTools );
1200
1201                 $wgOut->addHTML( "
1202 <div class='templatesUsed'>
1203 {$formattedtemplates}
1204 </div>
1205 " );
1206
1207                 if ( $wgUser->isLoggedIn() ) {
1208                         /**
1209                          * To make it harder for someone to slip a user a page
1210                          * which submits an edit form to the wiki without their
1211                          * knowledge, a random token is associated with the login
1212                          * session. If it's not passed back with the submission,
1213                          * we won't save the page, or render user JavaScript and
1214                          * CSS previews.
1215                          */
1216                         $token = htmlspecialchars( $wgUser->editToken() );
1217                         $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
1218                 }
1219
1220                 # If a blank edit summary was previously provided, and the appropriate
1221                 # user preference is active, pass a hidden tag here. This will stop the
1222                 # user being bounced back more than once in the event that a summary
1223                 # is not required.
1224                 if( $this->missingSummary ) {
1225                         $wgOut->addHTML( "<input type=\"hidden\" name=\"wpIgnoreBlankSummary\" value=\"1\" />\n" );
1226                 }
1227
1228                 # For a bit more sophisticated detection of blank summaries, hash the
1229                 # automatic one and pass that in a hidden field.
1230                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1231                 $wgOut->addHtml( wfHidden( 'wpAutoSummary', $autosumm ) );
1232
1233                 if ( $this->isConflict ) {
1234                         $wgOut->addWikiText( '==' . wfMsg( "yourdiff" ) . '==' );
1235
1236                         $de = new DifferenceEngine( $this->mTitle );
1237                         $de->setText( $this->textbox2, $this->textbox1 );
1238                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1239
1240                         $wgOut->addWikiText( '==' . wfMsg( "yourtext" ) . '==' );
1241                         $wgOut->addHTML( "<textarea tabindex=6 id='wpTextbox2' name=\"wpTextbox2\" rows='{$rows}' cols='{$cols}' wrap='virtual'>"
1242                                 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox2 ) ) . "\n</textarea>" );
1243                 }
1244                 $wgOut->addHTML( $this->editFormTextBottom );
1245                 $wgOut->addHTML( "</form>\n" );
1246                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1247
1248                         if ( $this->formtype == 'preview') {
1249                                 $this->showPreview( $previewOutput );
1250                         } else {
1251                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
1252                         }
1253
1254                         if ( $this->formtype == 'diff') {
1255                                 $wgOut->addHTML( $this->getDiff() );
1256                         }
1257
1258                 }
1259
1260                 wfProfileOut( $fname );
1261         }
1262
1263         /**
1264          * Append preview output to $wgOut.
1265          * Includes category rendering if this is a category page.
1266          *
1267          * @param string $text The HTML to be output for the preview.
1268          */
1269         private function showPreview( $text ) {
1270                 global $wgOut;
1271
1272                 $wgOut->addHTML( '<div id="wikiPreview">' );
1273                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1274                         $this->mArticle->openShowCategory();
1275                 }
1276                 $wgOut->addHTML( $text );
1277                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1278                         $this->mArticle->closeShowCategory();
1279                 }
1280                 $wgOut->addHTML( '</div>' );
1281         }
1282
1283         /**
1284          * Live Preview lets us fetch rendered preview page content and
1285          * add it to the page without refreshing the whole page.
1286          * If not supported by the browser it will fall through to the normal form
1287          * submission method.
1288          *
1289          * This function outputs a script tag to support live preview, and
1290          * returns an onclick handler which should be added to the attributes
1291          * of the preview button
1292          */
1293         function doLivePreviewScript() {
1294                 global $wgStylePath, $wgJsMimeType, $wgStyleVersion, $wgOut, $wgTitle;
1295                 $wgOut->addHTML( '<script type="'.$wgJsMimeType.'" src="' .
1296                         htmlspecialchars( "$wgStylePath/common/preview.js?$wgStyleVersion" ) .
1297                         '"></script>' . "\n" );
1298                 $liveAction = $wgTitle->getLocalUrl( 'action=submit&wpPreview=true&live=true' );
1299                 return "return !livePreview(" .
1300                         "getElementById('wikiPreview')," .
1301                         "editform.wpTextbox1.value," .
1302                         '"' . $liveAction . '"' . ")";
1303         }
1304
1305         function getLastDelete() {
1306                 $dbr =& wfGetDB( DB_SLAVE );
1307                 $fname = 'EditPage::getLastDelete';
1308                 $res = $dbr->select(
1309                         array( 'logging', 'user' ),
1310                         array( 'log_type',
1311                                'log_action',
1312                                'log_timestamp',
1313                                'log_user',
1314                                'log_namespace',
1315                                'log_title',
1316                                'log_comment',
1317                                'log_params',
1318                                'user_name', ),
1319                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1320                                'log_title' => $this->mTitle->getDBkey(),
1321                                'log_type' => 'delete',
1322                                'log_action' => 'delete',
1323                                'user_id=log_user' ),
1324                         $fname,
1325                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
1326
1327                 if($dbr->numRows($res) == 1) {
1328                         while ( $x = $dbr->fetchObject ( $res ) )
1329                                 $data = $x;
1330                         $dbr->freeResult ( $res ) ;
1331                 } else {
1332                         $data = null;
1333                 }
1334                 return $data;
1335         }
1336
1337         /**
1338          * @todo document
1339          */
1340         function getPreviewText() {
1341                 global $wgOut, $wgUser, $wgTitle, $wgParser;
1342
1343                 $fname = 'EditPage::getPreviewText';
1344                 wfProfileIn( $fname );
1345
1346                 if ( $this->mTriedSave && !$this->mTokenOk ) {
1347                         $msg = 'session_fail_preview';
1348                 } else {
1349                         $msg = 'previewnote';
1350                 }
1351                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
1352                         "<div class='previewnote'>" . $wgOut->parse( wfMsg( $msg ) ) . "</div>\n";
1353                 if ( $this->isConflict ) {
1354                         $previewhead.='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1355                 }
1356
1357                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1358                 $parserOptions->setEditSection( false );
1359
1360                 global $wgRawHtml;
1361                 if( $wgRawHtml && !$this->mTokenOk ) {
1362                         // Could be an offsite preview attempt. This is very unsafe if
1363                         // HTML is enabled, as it could be an attack.
1364                         return $wgOut->parse( "<div class='previewnote'>" .
1365                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1366                 }
1367
1368                 # don't parse user css/js, show message about preview
1369                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1370
1371                 if ( $this->isCssJsSubpage ) {
1372                         if(preg_match("/\\.css$/", $wgTitle->getText() ) ) {
1373                                 $previewtext = wfMsg('usercsspreview');
1374                         } else if(preg_match("/\\.js$/", $wgTitle->getText() ) ) {
1375                                 $previewtext = wfMsg('userjspreview');
1376                         }
1377                         $parserOptions->setTidy(true);
1378                         $parserOutput = $wgParser->parse( $previewtext , $wgTitle, $parserOptions );
1379                         $wgOut->addHTML( $parserOutput->mText );
1380                         wfProfileOut( $fname );
1381                         return $previewhead;
1382                 } else {
1383                         $toparse = $this->textbox1;
1384
1385                         # If we're adding a comment, we need to show the
1386                         # summary as the headline
1387                         if($this->section=="new" && $this->summary!="") {
1388                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1389                         }
1390
1391                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData ;
1392                         $parserOptions->setTidy(true);
1393                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ) ."\n\n",
1394                                         $wgTitle, $parserOptions );
1395
1396                         $previewHTML = $parserOutput->getText();
1397                         $wgOut->addParserOutputNoText( $parserOutput );
1398
1399                         foreach ( $parserOutput->getTemplates() as $ns => $template)
1400                                 foreach ( array_keys( $template ) as $dbk)
1401                                         $this->mPreviewTemplates[] = Title::makeTitle($ns, $dbk);
1402
1403                         wfProfileOut( $fname );
1404                         return $previewhead . $previewHTML;
1405                 }
1406         }
1407
1408         /**
1409          * Call the stock "user is blocked" page
1410          */
1411         function blockedPage() {
1412                 global $wgOut, $wgUser;
1413                 $wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
1414
1415                 # If the user made changes, preserve them when showing the markup
1416                 # (This happens when a user is blocked during edit, for instance)
1417                 $first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
1418                 if( $first ) {
1419                         $source = $this->mTitle->exists() ? $this->getContent() : false;
1420                 } else {
1421                         $source = $this->textbox1;
1422                 }
1423
1424                 # Spit out the source or the user's modified version
1425                 if( $source !== false ) {
1426                         $rows = $wgUser->getOption( 'rows' );
1427                         $cols = $wgUser->getOption( 'cols' );
1428                         $attribs = array( 'id' => 'wpTextbox1', 'name' => 'wpTextbox1', 'cols' => $cols, 'rows' => $rows, 'readonly' => 'readonly' );
1429                         $wgOut->addHtml( '<hr />' );
1430                         $wgOut->addWikiText( wfMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() ) );
1431                         $wgOut->addHtml( wfOpenElement( 'textarea', $attribs ) . htmlspecialchars( $source ) . wfCloseElement( 'textarea' ) );
1432                 }
1433         }
1434
1435         /**
1436          * Produce the stock "please login to edit pages" page
1437          */
1438         function userNotLoggedInPage() {
1439                 global $wgUser, $wgOut;
1440                 $skin = $wgUser->getSkin();
1441
1442                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1443                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $this->mTitle->getPrefixedUrl() );
1444
1445                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1446                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1447                 $wgOut->setArticleRelated( false );
1448
1449                 $wgOut->addHtml( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
1450                 $wgOut->returnToMain( false, $this->mTitle->getPrefixedUrl() );
1451         }
1452
1453         /**
1454          * Creates a basic error page which informs the user that
1455          * they have to validate their email address before being
1456          * allowed to edit.
1457          */
1458         function userNotConfirmedPage() {
1459                 global $wgOut;
1460
1461                 $wgOut->setPageTitle( wfMsg( 'confirmedittitle' ) );
1462                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1463                 $wgOut->setArticleRelated( false );
1464
1465                 $wgOut->addWikiText( wfMsg( 'confirmedittext' ) );
1466                 $wgOut->returnToMain( false );
1467         }
1468
1469         /**
1470          * Produce the stock "your edit contains spam" page
1471          *
1472          * @param $match Text which triggered one or more filters
1473          */
1474         function spamPage( $match = false ) {
1475                 global $wgOut;
1476
1477                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1478                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1479                 $wgOut->setArticleRelated( false );
1480
1481                 $wgOut->addWikiText( wfMsg( 'spamprotectiontext' ) );
1482                 if ( $match )
1483                         $wgOut->addWikiText( wfMsg( 'spamprotectionmatch', "<nowiki>{$match}</nowiki>" ) );
1484
1485                 $wgOut->returnToMain( false );
1486         }
1487
1488         /**
1489          * @private
1490          * @todo document
1491          */
1492         function mergeChangesInto( &$editText ){
1493                 $fname = 'EditPage::mergeChangesInto';
1494                 wfProfileIn( $fname );
1495
1496                 $db =& wfGetDB( DB_MASTER );
1497
1498                 // This is the revision the editor started from
1499                 $baseRevision = Revision::loadFromTimestamp(
1500                         $db, $this->mArticle->mTitle, $this->edittime );
1501                 if( is_null( $baseRevision ) ) {
1502                         wfProfileOut( $fname );
1503                         return false;
1504                 }
1505                 $baseText = $baseRevision->getText();
1506
1507                 // The current state, we want to merge updates into it
1508                 $currentRevision =  Revision::loadFromTitle(
1509                         $db, $this->mArticle->mTitle );
1510                 if( is_null( $currentRevision ) ) {
1511                         wfProfileOut( $fname );
1512                         return false;
1513                 }
1514                 $currentText = $currentRevision->getText();
1515
1516                 if( wfMerge( $baseText, $editText, $currentText, $result ) ){
1517                         $editText = $result;
1518                         wfProfileOut( $fname );
1519                         return true;
1520                 } else {
1521                         wfProfileOut( $fname );
1522                         return false;
1523                 }
1524         }
1525
1526         /**
1527          * Check if the browser is on a blacklist of user-agents known to
1528          * mangle UTF-8 data on form submission. Returns true if Unicode
1529          * should make it through, false if it's known to be a problem.
1530          * @return bool
1531          * @private
1532          */
1533         function checkUnicodeCompliantBrowser() {
1534                 global $wgBrowserBlackList;
1535                 if( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
1536                         // No User-Agent header sent? Trust it by default...
1537                         return true;
1538                 }
1539                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1540                 foreach ( $wgBrowserBlackList as $browser ) {
1541                         if ( preg_match($browser, $currentbrowser) ) {
1542                                 return false;
1543                         }
1544                 }
1545                 return true;
1546         }
1547
1548         /**
1549          * Format an anchor fragment as it would appear for a given section name
1550          * @param string $text
1551          * @return string
1552          * @private
1553          */
1554         function sectionAnchor( $text ) {
1555                 $headline = Sanitizer::decodeCharReferences( $text );
1556                 # strip out HTML
1557                 $headline = preg_replace( '/<.*?' . '>/', '', $headline );
1558                 $headline = trim( $headline );
1559                 $sectionanchor = '#' . urlencode( str_replace( ' ', '_', $headline ) );
1560                 $replacearray = array(
1561                         '%3A' => ':',
1562                         '%' => '.'
1563                 );
1564                 return str_replace(
1565                         array_keys( $replacearray ),
1566                         array_values( $replacearray ),
1567                         $sectionanchor );
1568         }
1569
1570         /**
1571          * Shows a bulletin board style toolbar for common editing functions.
1572          * It can be disabled in the user preferences.
1573          * The necessary JavaScript code can be found in style/wikibits.js.
1574          */
1575         function getEditToolbar() {
1576                 global $wgStylePath, $wgContLang, $wgJsMimeType;
1577
1578                 /**
1579                  * toolarray an array of arrays which each include the filename of
1580                  * the button image (without path), the opening tag, the closing tag,
1581                  * and optionally a sample text that is inserted between the two when no
1582                  * selection is highlighted.
1583                  * The tip text is shown when the user moves the mouse over the button.
1584                  *
1585                  * Already here are accesskeys (key), which are not used yet until someone
1586                  * can figure out a way to make them work in IE. However, we should make
1587                  * sure these keys are not defined on the edit page.
1588                  */
1589                 $toolarray=array(
1590                         array(  'image'=>'button_bold.png',
1591                                         'open'  =>      "\'\'\'",
1592                                         'close' =>      "\'\'\'",
1593                                         'sample'=>      wfMsg('bold_sample'),
1594                                         'tip'   =>      wfMsg('bold_tip'),
1595                                         'key'   =>      'B'
1596                                 ),
1597                         array(  'image'=>'button_italic.png',
1598                                         'open'  =>      "\'\'",
1599                                         'close' =>      "\'\'",
1600                                         'sample'=>      wfMsg('italic_sample'),
1601                                         'tip'   =>      wfMsg('italic_tip'),
1602                                         'key'   =>      'I'
1603                                 ),
1604                         array(  'image'=>'button_link.png',
1605                                         'open'  =>      '[[',
1606                                         'close' =>      ']]',
1607                                         'sample'=>      wfMsg('link_sample'),
1608                                         'tip'   =>      wfMsg('link_tip'),
1609                                         'key'   =>      'L'
1610                                 ),
1611                         array(  'image'=>'button_extlink.png',
1612                                         'open'  =>      '[',
1613                                         'close' =>      ']',
1614                                         'sample'=>      wfMsg('extlink_sample'),
1615                                         'tip'   =>      wfMsg('extlink_tip'),
1616                                         'key'   =>      'X'
1617                                 ),
1618                         array(  'image'=>'button_headline.png',
1619                                         'open'  =>      "\\n== ",
1620                                         'close' =>      " ==\\n",
1621                                         'sample'=>      wfMsg('headline_sample'),
1622                                         'tip'   =>      wfMsg('headline_tip'),
1623                                         'key'   =>      'H'
1624                                 ),
1625                         array(  'image'=>'button_image.png',
1626                                         'open'  =>      '[['.$wgContLang->getNsText(NS_IMAGE).":",
1627                                         'close' =>      ']]',
1628                                         'sample'=>      wfMsg('image_sample'),
1629                                         'tip'   =>      wfMsg('image_tip'),
1630                                         'key'   =>      'D'
1631                                 ),
1632                         array(  'image' =>'button_media.png',
1633                                         'open'  =>      '[['.$wgContLang->getNsText(NS_MEDIA).':',
1634                                         'close' =>      ']]',
1635                                         'sample'=>      wfMsg('media_sample'),
1636                                         'tip'   =>      wfMsg('media_tip'),
1637                                         'key'   =>      'M'
1638                                 ),
1639                         array(  'image' =>'button_math.png',
1640                                         'open'  =>      "<math>",
1641                                         'close' =>      "<\\/math>",
1642                                         'sample'=>      wfMsg('math_sample'),
1643                                         'tip'   =>      wfMsg('math_tip'),
1644                                         'key'   =>      'C'
1645                                 ),
1646                         array(  'image' =>'button_nowiki.png',
1647                                         'open'  =>      "<nowiki>",
1648                                         'close' =>      "<\\/nowiki>",
1649                                         'sample'=>      wfMsg('nowiki_sample'),
1650                                         'tip'   =>      wfMsg('nowiki_tip'),
1651                                         'key'   =>      'N'
1652                                 ),
1653                         array(  'image' =>'button_sig.png',
1654                                         'open'  =>      '--~~~~',
1655                                         'close' =>      '',
1656                                         'sample'=>      '',
1657                                         'tip'   =>      wfMsg('sig_tip'),
1658                                         'key'   =>      'Y'
1659                                 ),
1660                         array(  'image' =>'button_hr.png',
1661                                         'open'  =>      "\\n----\\n",
1662                                         'close' =>      '',
1663                                         'sample'=>      '',
1664                                         'tip'   =>      wfMsg('hr_tip'),
1665                                         'key'   =>      'R'
1666                                 )
1667                 );
1668                 $toolbar = "<div id='toolbar'>\n";
1669                 $toolbar.="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
1670
1671                 foreach($toolarray as $tool) {
1672
1673                         $image=$wgStylePath.'/common/images/'.$tool['image'];
1674                         $open=$tool['open'];
1675                         $close=$tool['close'];
1676                         $sample = wfEscapeJsString( $tool['sample'] );
1677
1678                         // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
1679                         // Older browsers show a "speedtip" type message only for ALT.
1680                         // Ideally these should be different, realistically they
1681                         // probably don't need to be.
1682                         $tip = wfEscapeJsString( $tool['tip'] );
1683
1684                         #$key = $tool["key"];
1685
1686                         $toolbar.="addButton('$image','$tip','$open','$close','$sample');\n";
1687                 }
1688
1689                 $toolbar.="/*]]>*/\n</script>";
1690                 $toolbar.="\n</div>";
1691                 return $toolbar;
1692         }
1693
1694         /**
1695          * Output preview text only. This can be sucked into the edit page
1696          * via JavaScript, and saves the server time rendering the skin as
1697          * well as theoretically being more robust on the client (doesn't
1698          * disturb the edit box's undo history, won't eat your text on
1699          * failure, etc).
1700          *
1701          * @todo This doesn't include category or interlanguage links.
1702          *       Would need to enhance it a bit, maybe wrap them in XML
1703          *       or something... that might also require more skin
1704          *       initialization, so check whether that's a problem.
1705          */
1706         function livePreview() {
1707                 global $wgOut;
1708                 $wgOut->disable();
1709                 header( 'Content-type: text/xml' );
1710                 header( 'Cache-control: no-cache' );
1711                 # FIXME
1712                 echo $this->getPreviewText( );
1713                 /* To not shake screen up and down between preview and live-preview */
1714                 echo "<br style=\"clear:both;\" />\n";
1715         }
1716
1717
1718         /**
1719          * Get a diff between the current contents of the edit box and the
1720          * version of the page we're editing from.
1721          *
1722          * If this is a section edit, we'll replace the section as for final
1723          * save and then make a comparison.
1724          *
1725          * @return string HTML
1726          */
1727         function getDiff() {
1728                 $oldtext = $this->mArticle->fetchContent();
1729                 $newtext = $this->mArticle->replaceSection(
1730                         $this->section, $this->textbox1, $this->summary, $this->edittime );
1731                 $newtext = $this->mArticle->preSaveTransform( $newtext );
1732                 $oldtitle = wfMsgExt( 'currentrev', array('parseinline') );
1733                 $newtitle = wfMsgExt( 'yourtext', array('parseinline') );
1734                 if ( $oldtext !== false  || $newtext != '' ) {
1735                         $de = new DifferenceEngine( $this->mTitle );
1736                         $de->setText( $oldtext, $newtext );
1737                         $difftext = $de->getDiff( $oldtitle, $newtitle );
1738                 } else {
1739                         $difftext = '';
1740                 }
1741
1742                 return '<div id="wikiDiff">' . $difftext . '</div>';
1743         }
1744
1745         /**
1746          * Filter an input field through a Unicode de-armoring process if it
1747          * came from an old browser with known broken Unicode editing issues.
1748          *
1749          * @param WebRequest $request
1750          * @param string $field
1751          * @return string
1752          * @private
1753          */
1754         function safeUnicodeInput( $request, $field ) {
1755                 $text = rtrim( $request->getText( $field ) );
1756                 return $request->getBool( 'safemode' )
1757                         ? $this->unmakesafe( $text )
1758                         : $text;
1759         }
1760
1761         /**
1762          * Filter an output field through a Unicode armoring process if it is
1763          * going to an old browser with known broken Unicode editing issues.
1764          *
1765          * @param string $text
1766          * @return string
1767          * @private
1768          */
1769         function safeUnicodeOutput( $text ) {
1770                 global $wgContLang;
1771                 $codedText = $wgContLang->recodeForEdit( $text );
1772                 return $this->checkUnicodeCompliantBrowser()
1773                         ? $codedText
1774                         : $this->makesafe( $codedText );
1775         }
1776
1777         /**
1778          * A number of web browsers are known to corrupt non-ASCII characters
1779          * in a UTF-8 text editing environment. To protect against this,
1780          * detected browsers will be served an armored version of the text,
1781          * with non-ASCII chars converted to numeric HTML character references.
1782          *
1783          * Preexisting such character references will have a 0 added to them
1784          * to ensure that round-trips do not alter the original data.
1785          *
1786          * @param string $invalue
1787          * @return string
1788          * @private
1789          */
1790         function makesafe( $invalue ) {
1791                 // Armor existing references for reversability.
1792                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
1793
1794                 $bytesleft = 0;
1795                 $result = "";
1796                 $working = 0;
1797                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1798                         $bytevalue = ord( $invalue{$i} );
1799                         if( $bytevalue <= 0x7F ) { //0xxx xxxx
1800                                 $result .= chr( $bytevalue );
1801                                 $bytesleft = 0;
1802                         } elseif( $bytevalue <= 0xBF ) { //10xx xxxx
1803                                 $working = $working << 6;
1804                                 $working += ($bytevalue & 0x3F);
1805                                 $bytesleft--;
1806                                 if( $bytesleft <= 0 ) {
1807                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
1808                                 }
1809                         } elseif( $bytevalue <= 0xDF ) { //110x xxxx
1810                                 $working = $bytevalue & 0x1F;
1811                                 $bytesleft = 1;
1812                         } elseif( $bytevalue <= 0xEF ) { //1110 xxxx
1813                                 $working = $bytevalue & 0x0F;
1814                                 $bytesleft = 2;
1815                         } else { //1111 0xxx
1816                                 $working = $bytevalue & 0x07;
1817                                 $bytesleft = 3;
1818                         }
1819                 }
1820                 return $result;
1821         }
1822
1823         /**
1824          * Reverse the previously applied transliteration of non-ASCII characters
1825          * back to UTF-8. Used to protect data from corruption by broken web browsers
1826          * as listed in $wgBrowserBlackList.
1827          *
1828          * @param string $invalue
1829          * @return string
1830          * @private
1831          */
1832         function unmakesafe( $invalue ) {
1833                 $result = "";
1834                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1835                         if( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
1836                                 $i += 3;
1837                                 $hexstring = "";
1838                                 do {
1839                                         $hexstring .= $invalue{$i};
1840                                         $i++;
1841                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
1842
1843                                 // Do some sanity checks. These aren't needed for reversability,
1844                                 // but should help keep the breakage down if the editor
1845                                 // breaks one of the entities whilst editing.
1846                                 if ((substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6)) {
1847                                         $codepoint = hexdec($hexstring);
1848                                         $result .= codepointToUtf8( $codepoint );
1849                                 } else {
1850                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
1851                                 }
1852                         } else {
1853                                 $result .= substr( $invalue, $i, 1 );
1854                         }
1855                 }
1856                 // reverse the transform that we made for reversability reasons.
1857                 return strtr( $result, array( "&#x0" => "&#x" ) );
1858         }
1859
1860         function noCreatePermission() {
1861                 global $wgOut;
1862                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
1863                 $wgOut->addWikiText( wfMsg( 'nocreatetext' ) );
1864         }
1865
1866 }
1867
1868 ?>