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         public $editFormPageTop; // Before even the preview
  47         public $editFormTextTop;
  48         public $editFormTextAfterWarn;
  49         public $editFormTextAfterTools;
  50         public $editFormTextBottom;
  51
  52         /**
  53          * @todo document
  54          * @param $article
  55          */
  56         function EditPage( $article ) {
  57                 $this->mArticle =& $article;
  58                 global $wgTitle;
  59                 $this->mTitle =& $wgTitle;
  60
  61                 # Placeholders for text injection by hooks (empty per default)
  62                 $this->editFormPageTop =
  63                 $this->editFormTextTop =
  64                 $this->editFormTextAfterWarn =
  65                 $this->editFormTextAfterTools =
  66                 $this->editFormTextBottom = "";
  67         }
  68
  69         /**
  70          * Fetch initial editing page content.
  71          */
  72         private function getContent() {
  73                 global $wgRequest, $wgParser;
  74
  75                 # Get variables from query string :P
  76                 $section = $wgRequest->getVal( 'section' );
  77                 $preload = $wgRequest->getVal( 'preload' );
  78                 $undo = $wgRequest->getVal( 'undo' );
  79
  80                 wfProfileIn( __METHOD__ );
  81
  82                 $text = '';
  83                 if( !$this->mTitle->exists() ) {
  84
  85                         # If requested, preload some text.
  86                         $text = $this->getPreloadedText( $preload );
  87
  88                         # We used to put MediaWiki:Newarticletext here if
  89                         # $text was empty at this point.
  90                         # This is now shown above the edit box instead.
  91                 } else {
  92                         // FIXME: may be better to use Revision class directly
  93                         // But don't mess with it just yet. Article knows how to
  94                         // fetch the page record from the high-priority server,
  95                         // which is needed to guarantee we don't pick up lagged
  96                         // information.
  97
  98                         $text = $this->mArticle->getContent();
  99
 100                         if ( $undo > 0 ) {
 101                                 #Undoing a specific edit overrides section editing; section-editing
 102                                 # doesn't work with undoing.
 103                                 $undorev = Revision::newFromId($undo);
 104                                 $oldrev = $undorev->getPrevious();
 105
 106                                 #Sanity check, make sure it's the right page.
 107                                 # Otherwise, $text will be left as-is.
 108                                 if ($undorev->getPage() == $this->mArticle->getID()) {
 109                                         $undorev_text = $undorev->getText();
 110                                         $oldrev_text = $oldrev->getText();
 111                                         $currev_text = $text;
 112
 113                                         $result = wfMerge($undorev_text, $oldrev_text, $currev_text, $text);
 114
 115                                         if (!$result) {
 116                                                 #Undoing failed. Bailing out with regular revision text.
 117                                                 $text = $currev_text;
 118
 119                                                 #Give a warning
 120                                                 $this->editFormPageTop .= "<h2>" . wfMsg('undofailed') . "</h2>\n" .
 121                                                                         '<p><strong class="error">'.wfMsg('explainundofailed').'</strong></p>';
 122                                         }
 123                                 }
 124                         }
 125                         else if( $section != '' ) {
 126                                 if( $section == 'new' ) {
 127                                         $text = $this->getPreloadedText( $preload );
 128                                 } else {
 129                                         $text = $wgParser->getSection( $text, $section );
 130                                 }
 131                         }
 132                 }
 133
 134                 wfProfileOut( __METHOD__ );
 135                 return $text;
 136         }
 137
 138         /**
 139          * Get the contents of a page from its title and remove includeonly tags
 140          *
 141          * @param $preload String: the title of the page.
 142          * @return string The contents of the page.
 143          */
 144         private function getPreloadedText($preload) {
 145                 if ( $preload === '' )
 146                         return '';
 147                 else {
 148                         $preloadTitle = Title::newFromText( $preload );
 149                         if ( isset( $preloadTitle ) && $preloadTitle->userCanRead() ) {
 150                                 $rev=Revision::newFromTitle($preloadTitle);
 151                                 if ( is_object( $rev ) ) {
 152                                         $text = $rev->getText();
 153                                         // TODO FIXME: AAAAAAAAAAA, this shouldn't be implementing
 154                                         // its own mini-parser! -ævar
 155                                         $text = preg_replace( '~</?includeonly>~', '', $text );
 156                                         return $text;
 157                                 } else
 158                                         return '';
 159                         }
 160                 }
 161         }
 162
 163         /**
 164          * This is the function that extracts metadata from the article body on the first view.
 165          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
 166          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
 167          */
 168         function extractMetaDataFromArticle () {
 169                 global $wgUseMetadataEdit , $wgMetadataWhitelist , $wgLang ;
 170                 $this->mMetaData = '' ;
 171                 if ( !$wgUseMetadataEdit ) return ;
 172                 if ( $wgMetadataWhitelist == '' ) return ;
 173                 $s = '' ;
 174                 $t = $this->getContent();
 175
 176                 # MISSING : <nowiki> filtering
 177
 178                 # Categories and language links
 179                 $t = explode ( "\n" , $t ) ;
 180                 $catlow = strtolower ( $wgLang->getNsText ( NS_CATEGORY ) ) ;
 181                 $cat = $ll = array() ;
 182                 foreach ( $t AS $key => $x )
 183                 {
 184                         $y = trim ( strtolower ( $x ) ) ;
 185                         while ( substr ( $y , 0 , 2 ) == '[[' )
 186                         {
 187                                 $y = explode ( ']]' , trim ( $x ) ) ;
 188                                 $first = array_shift ( $y ) ;
 189                                 $first = explode ( ':' , $first ) ;
 190                                 $ns = array_shift ( $first ) ;
 191                                 $ns = trim ( str_replace ( '[' , '' , $ns ) ) ;
 192                                 if ( strlen ( $ns ) == 2 OR strtolower ( $ns ) == $catlow )
 193                                 {
 194                                         $add = '[[' . $ns . ':' . implode ( ':' , $first ) . ']]' ;
 195                                         if ( strtolower ( $ns ) == $catlow ) $cat[] = $add ;
 196                                         else $ll[] = $add ;
 197                                         $x = implode ( ']]' , $y ) ;
 198                                         $t[$key] = $x ;
 199                                         $y = trim ( strtolower ( $x ) ) ;
 200                                 }
 201                         }
 202                 }
 203                 if ( count ( $cat ) ) $s .= implode ( ' ' , $cat ) . "\n" ;
 204                 if ( count ( $ll ) ) $s .= implode ( ' ' , $ll ) . "\n" ;
 205                 $t = implode ( "\n" , $t ) ;
 206
 207                 # Load whitelist
 208                 $sat = array () ; # stand-alone-templates; must be lowercase
 209                 $wl_title = Title::newFromText ( $wgMetadataWhitelist ) ;
 210                 $wl_article = new Article ( $wl_title ) ;
 211                 $wl = explode ( "\n" , $wl_article->getContent() ) ;
 212                 foreach ( $wl AS $x )
 213                 {
 214                         $isentry = false ;
 215                         $x = trim ( $x ) ;
 216                         while ( substr ( $x , 0 , 1 ) == '*' )
 217                         {
 218                                 $isentry = true ;
 219                                 $x = trim ( substr ( $x , 1 ) ) ;
 220                         }
 221                         if ( $isentry )
 222                         {
 223                                 $sat[] = strtolower ( $x ) ;
 224                         }
 225
 226                 }
 227
 228                 # Templates, but only some
 229                 $t = explode ( '{{' , $t ) ;
 230                 $tl = array () ;
 231                 foreach ( $t AS $key => $x )
 232                 {
 233                         $y = explode ( '}}' , $x , 2 ) ;
 234                         if ( count ( $y ) == 2 )
 235                         {
 236                                 $z = $y[0] ;
 237                                 $z = explode ( '|' , $z ) ;
 238                                 $tn = array_shift ( $z ) ;
 239                                 if ( in_array ( strtolower ( $tn ) , $sat ) )
 240                                 {
 241                                         $tl[] = '{{' . $y[0] . '}}' ;
 242                                         $t[$key] = $y[1] ;
 243                                         $y = explode ( '}}' , $y[1] , 2 ) ;
 244                                 }
 245                                 else $t[$key] = '{{' . $x ;
 246                         }
 247                         else if ( $key != 0 ) $t[$key] = '{{' . $x ;
 248                         else $t[$key] = $x ;
 249                 }
 250                 if ( count ( $tl ) ) $s .= implode ( ' ' , $tl ) ;
 251                 $t = implode ( '' , $t ) ;
 252
 253                 $t = str_replace ( "\n\n\n" , "\n" , $t ) ;
 254                 $this->mArticle->mContent = $t ;
 255                 $this->mMetaData = $s ;
 256         }
 257
 258         function submit() {
 259                 $this->edit();
 260         }
 261
 262         /**
 263          * This is the function that gets called for "action=edit". It
 264          * sets up various member variables, then passes execution to
 265          * another function, usually showEditForm()
 266          *
 267          * The edit form is self-submitting, so that when things like
 268          * preview and edit conflicts occur, we get the same form back
 269          * with the extra stuff added.  Only when the final submission
 270          * is made and all is well do we actually save and redirect to
 271          * the newly-edited page.
 272          */
 273         function edit() {
 274                 global $wgOut, $wgUser, $wgRequest, $wgTitle;
 275                 global $wgEmailConfirmToEdit;
 276
 277                 if ( ! wfRunHooks( 'AlternateEdit', array( &$this  ) ) )
 278                         return;
 279
 280                 $fname = 'EditPage::edit';
 281                 wfProfileIn( $fname );
 282                 wfDebug( "$fname: enter\n" );
 283
 284                 // this is not an article
 285                 $wgOut->setArticleFlag(false);
 286
 287                 $this->importFormData( $wgRequest );
 288                 $this->firsttime = false;
 289
 290                 if( $this->live ) {
 291                         $this->livePreview();
 292                         wfProfileOut( $fname );
 293                         return;
 294                 }
 295
 296                 if ( ! $this->mTitle->userCanEdit() ) {
 297                         wfDebug( "$fname: user can't edit\n" );
 298                         $wgOut->readOnlyPage( $this->getContent(), true );
 299                         wfProfileOut( $fname );
 300                         return;
 301                 }
 302                 wfDebug( "$fname: Checking blocks\n" );
 303                 if ( !$this->preview && !$this->diff && $wgUser->isBlockedFrom( $this->mTitle, !$this->save ) ) {
 304                         # When previewing, don't check blocked state - will get caught at save time.
 305                         # Also, check when starting edition is done against slave to improve performance.
 306                         wfDebug( "$fname: user is blocked\n" );
 307                         $this->blockedPage();
 308                         wfProfileOut( $fname );
 309                         return;
 310                 }
 311                 if ( !$wgUser->isAllowed('edit') ) {
 312                         if ( $wgUser->isAnon() ) {
 313                                 wfDebug( "$fname: user must log in\n" );
 314                                 $this->userNotLoggedInPage();
 315                                 wfProfileOut( $fname );
 316                                 return;
 317                         } else {
 318                                 wfDebug( "$fname: read-only page\n" );
 319                                 $wgOut->readOnlyPage( $this->getContent(), true );
 320                                 wfProfileOut( $fname );
 321                                 return;
 322                         }
 323                 }
 324                 if ($wgEmailConfirmToEdit && !$wgUser->isEmailConfirmed()) {
 325                         wfDebug("$fname: user must confirm e-mail address\n");
 326                         $this->userNotConfirmedPage();
 327                         wfProfileOut($fname);
 328                         return;
 329                 }
 330                 if ( !$this->mTitle->userCanCreate() && !$this->mTitle->exists() ) {
 331                         wfDebug( "$fname: no create permission\n" );
 332                         $this->noCreatePermission();
 333                         wfProfileOut( $fname );
 334                         return;
 335                 }
 336                 if ( wfReadOnly() ) {
 337                         wfDebug( "$fname: read-only mode is engaged\n" );
 338                         if( $this->save || $this->preview ) {
 339                                 $this->formtype = 'preview';
 340                         } else if ( $this->diff ) {
 341                                 $this->formtype = 'diff';
 342                         } else {
 343                                 $wgOut->readOnlyPage( $this->getContent() );
 344                                 wfProfileOut( $fname );
 345                                 return;
 346                         }
 347                 } else {
 348                         if ( $this->save ) {
 349                                 $this->formtype = 'save';
 350                         } else if ( $this->preview ) {
 351                                 $this->formtype = 'preview';
 352                         } else if ( $this->diff ) {
 353                                 $this->formtype = 'diff';
 354                         } else { # First time through
 355                                 $this->firsttime = true;
 356                                 if( $this->previewOnOpen() ) {
 357                                         $this->formtype = 'preview';
 358                                 } else {
 359                                         $this->extractMetaDataFromArticle () ;
 360                                         $this->formtype = 'initial';
 361                                 }
 362                         }
 363                 }
 364
 365                 wfProfileIn( "$fname-business-end" );
 366
 367                 $this->isConflict = false;
 368                 // css / js subpages of user pages get a special treatment
 369                 $this->isCssJsSubpage      = $wgTitle->isCssJsSubpage();
 370                 $this->isValidCssJsSubpage = $wgTitle->isValidCssJsSubpage();
 371
 372                 /* Notice that we can't use isDeleted, because it returns true if article is ever deleted
 373                  * no matter it's current state
 374                  */
 375                 $this->deletedSinceEdit = false;
 376                 if ( $this->edittime != '' ) {
 377                         /* Note that we rely on logging table, which hasn't been always there,
 378                          * but that doesn't matter, because this only applies to brand new
 379                          * deletes. This is done on every preview and save request. Move it further down
 380                          * to only perform it on saves
 381                          */
 382                         if ( $this->mTitle->isDeleted() ) {
 383                                 $this->lastDelete = $this->getLastDelete();
 384                                 if ( !is_null($this->lastDelete) ) {
 385                                         $deletetime = $this->lastDelete->log_timestamp;
 386                                         if ( ($deletetime - $this->starttime) > 0 ) {
 387                                                 $this->deletedSinceEdit = true;
 388                                         }
 389                                 }
 390                         }
 391                 }
 392
 393                 if(!$this->mTitle->getArticleID() && ('initial' == $this->formtype || $this->firsttime )) { # new article
 394                         $this->showIntro();
 395                 }
 396                 if( $this->mTitle->isTalkPage() ) {
 397                         $wgOut->addWikiText( wfMsg( 'talkpagetext' ) );
 398                 }
 399
 400                 # Attempt submission here.  This will check for edit conflicts,
 401                 # and redundantly check for locked database, blocked IPs, etc.
 402                 # that edit() already checked just in case someone tries to sneak
 403                 # in the back door with a hand-edited submission URL.
 404
 405                 if ( 'save' == $this->formtype ) {
 406                         if ( !$this->attemptSave() ) {
 407                                 wfProfileOut( "$fname-business-end" );
 408                                 wfProfileOut( $fname );
 409                                 return;
 410                         }
 411                 }
 412
 413                 # First time through: get contents, set time for conflict
 414                 # checking, etc.
 415                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 416                         $this->initialiseForm();
 417                         if( !$this->mTitle->getArticleId() )
 418                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 419                 }
 420
 421                 $this->showEditForm();
 422                 wfProfileOut( "$fname-business-end" );
 423                 wfProfileOut( $fname );
 424         }
 425
 426         /**
 427          * Return true if this page should be previewed when the edit form
 428          * is initially opened.
 429          * @return bool
 430          * @private
 431          */
 432         function previewOnOpen() {
 433                 global $wgUser;
 434                 return $this->section != 'new' &&
 435                         ( ( $wgUser->getOption( 'previewonfirst' ) && $this->mTitle->exists() ) ||
 436                                 ( $this->mTitle->getNamespace() == NS_CATEGORY &&
 437                                         !$this->mTitle->exists() ) );
 438         }
 439
 440         /**
 441          * @todo document
 442          * @param $request
 443          */
 444         function importFormData( &$request ) {
 445                 global $wgLang, $wgUser;
 446                 $fname = 'EditPage::importFormData';
 447                 wfProfileIn( $fname );
 448
 449                 if( $request->wasPosted() ) {
 450                         # These fields need to be checked for encoding.
 451                         # Also remove trailing whitespace, but don't remove _initial_
 452                         # whitespace from the text boxes. This may be significant formatting.
 453                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 454                         $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
 455                         $this->mMetaData = rtrim( $request->getText( 'metadata'   ) );
 456                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 457                         $this->summary   = $wgLang->truncate( $request->getText( 'wpSummary'  ), 250 );
 458
 459                         $this->edittime = $request->getVal( 'wpEdittime' );
 460                         $this->starttime = $request->getVal( 'wpStarttime' );
 461
 462                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 463
 464                         if( is_null( $this->edittime ) ) {
 465                                 # If the form is incomplete, force to preview.
 466                                 wfDebug( "$fname: Form data appears to be incomplete\n" );
 467                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 468                                 $this->preview  = true;
 469                         } else {
 470                                 /* Fallback for live preview */
 471                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 472                                 $this->diff = $request->getCheck( 'wpDiff' );
 473
 474                                 // Remember whether a save was requested, so we can indicate
 475                                 // if we forced preview due to session failure.
 476                                 $this->mTriedSave = !$this->preview;
 477
 478                                 if ( $this->tokenOk( $request ) ) {
 479                                         # Some browsers will not report any submit button
 480                                         # if the user hits enter in the comment box.
 481                                         # The unmarked state will be assumed to be a save,
 482                                         # if the form seems otherwise complete.
 483                                         wfDebug( "$fname: Passed token check.\n" );
 484                                 } else if ( $this->diff ) {
 485                                         # Failed token check, but only requested "Show Changes".
 486                                         wfDebug( "$fname: Failed token check; Show Changes requested.\n" );
 487                                 } else {
 488                                         # Page might be a hack attempt posted from
 489                                         # an external site. Preview instead of saving.
 490                                         wfDebug( "$fname: Failed token check; forcing preview\n" );
 491                                         $this->preview = true;
 492                                 }
 493                         }
 494                         $this->save    = ! ( $this->preview OR $this->diff );
 495                         if( !preg_match( '/^\d{14}$/', $this->edittime )) {
 496                                 $this->edittime = null;
 497                         }
 498
 499                         if( !preg_match( '/^\d{14}$/', $this->starttime )) {
 500                                 $this->starttime = null;
 501                         }
 502
 503                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 504
 505                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 506                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 507
 508                         # Don't force edit summaries when a user is editing their own user or talk page
 509                         if( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) && $this->mTitle->getText() == $wgUser->getName() ) {
 510                                 $this->allowBlankSummary = true;
 511                         } else {
 512                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' );
 513                         }
 514
 515                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 516                 } else {
 517                         # Not a posted form? Start with nothing.
 518                         wfDebug( "$fname: Not a posted form.\n" );
 519                         $this->textbox1  = '';
 520                         $this->textbox2  = '';
 521                         $this->mMetaData = '';
 522                         $this->summary   = '';
 523                         $this->edittime  = '';
 524                         $this->starttime = wfTimestampNow();
 525                         $this->preview   = false;
 526                         $this->save      = false;
 527                         $this->diff      = false;
 528                         $this->minoredit = false;
 529                         $this->watchthis = false;
 530                         $this->recreate  = false;
 531                 }
 532
 533                 $this->oldid = $request->getInt( 'oldid' );
 534
 535                 # Section edit can come from either the form or a link
 536                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 537
 538                 $this->live = $request->getCheck( 'live' );
 539                 $this->editintro = $request->getText( 'editintro' );
 540
 541                 wfProfileOut( $fname );
 542         }
 543
 544         /**
 545          * Make sure the form isn't faking a user's credentials.
 546          *
 547          * @param $request WebRequest
 548          * @return bool
 549          * @private
 550          */
 551         function tokenOk( &$request ) {
 552                 global $wgUser;
 553                 if( $wgUser->isAnon() ) {
 554                         # Anonymous users may not have a session
 555                         # open. Don't tokenize.
 556                         $this->mTokenOk = true;
 557                 } else {
 558                         $this->mTokenOk = $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
 559                 }
 560                 return $this->mTokenOk;
 561         }
 562
 563         /** */
 564         function showIntro() {
 565                 global $wgOut, $wgUser;
 566                 $addstandardintro=true;
 567                 if($this->editintro) {
 568                         $introtitle=Title::newFromText($this->editintro);
 569                         if(isset($introtitle) && $introtitle->userCanRead()) {
 570                                 $rev=Revision::newFromTitle($introtitle);
 571                                 if($rev) {
 572                                         $wgOut->addSecondaryWikiText($rev->getText());
 573                                         $addstandardintro=false;
 574                                 }
 575                         }
 576                 }
 577                 if($addstandardintro) {
 578                         if ( $wgUser->isLoggedIn() )
 579                                 $wgOut->addWikiText( wfMsg( 'newarticletext' ) );
 580                         else
 581                                 $wgOut->addWikiText( wfMsg( 'newarticletextanon' ) );
 582                 }
 583         }
 584
 585         /**
 586          * Attempt submission
 587          * @return bool false if output is done, true if the rest of the form should be displayed
 588          */
 589         function attemptSave() {
 590                 global $wgSpamRegex, $wgFilterCallback, $wgUser, $wgOut;
 591                 global $wgMaxArticleSize;
 592
 593                 $fname = 'EditPage::attemptSave';
 594                 wfProfileIn( $fname );
 595                 wfProfileIn( "$fname-checks" );
 596
 597                 # Reintegrate metadata
 598                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 599                 $this->mMetaData = '' ;
 600
 601                 # Check for spam
 602                 $matches = array();
 603                 if ( $wgSpamRegex && preg_match( $wgSpamRegex, $this->textbox1, $matches ) ) {
 604                         $this->spamPage ( $matches[0] );
 605                         wfProfileOut( "$fname-checks" );
 606                         wfProfileOut( $fname );
 607                         return false;
 608                 }
 609                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section ) ) {
 610                         # Error messages or other handling should be performed by the filter function
 611                         wfProfileOut( $fname );
 612                         wfProfileOut( "$fname-checks" );
 613                         return false;
 614                 }
 615                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError ) ) ) {
 616                         # Error messages etc. could be handled within the hook...
 617                         wfProfileOut( $fname );
 618                         wfProfileOut( "$fname-checks" );
 619                         return false;
 620                 } elseif( $this->hookError != '' ) {
 621                         # ...or the hook could be expecting us to produce an error
 622                         wfProfileOut( "$fname-checks " );
 623                         wfProfileOut( $fname );
 624                         return true;
 625                 }
 626                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 627                         # Check block state against master, thus 'false'.
 628                         $this->blockedPage();
 629                         wfProfileOut( "$fname-checks" );
 630                         wfProfileOut( $fname );
 631                         return false;
 632                 }
 633                 $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 634                 if ( $this->kblength > $wgMaxArticleSize ) {
 635                         // Error will be displayed by showEditForm()
 636                         $this->tooBig = true;
 637                         wfProfileOut( "$fname-checks" );
 638                         wfProfileOut( $fname );
 639                         return true;
 640                 }
 641
 642                 if ( !$wgUser->isAllowed('edit') ) {
 643                         if ( $wgUser->isAnon() ) {
 644                                 $this->userNotLoggedInPage();
 645                                 wfProfileOut( "$fname-checks" );
 646                                 wfProfileOut( $fname );
 647                                 return false;
 648                         }
 649                         else {
 650                                 $wgOut->readOnlyPage();
 651                                 wfProfileOut( "$fname-checks" );
 652                                 wfProfileOut( $fname );
 653                                 return false;
 654                         }
 655                 }
 656
 657                 if ( wfReadOnly() ) {
 658                         $wgOut->readOnlyPage();
 659                         wfProfileOut( "$fname-checks" );
 660                         wfProfileOut( $fname );
 661                         return false;
 662                 }
 663                 if ( $wgUser->pingLimiter() ) {
 664                         $wgOut->rateLimited();
 665                         wfProfileOut( "$fname-checks" );
 666                         wfProfileOut( $fname );
 667                         return false;
 668                 }
 669
 670                 # If the article has been deleted while editing, don't save it without
 671                 # confirmation
 672                 if ( $this->deletedSinceEdit && !$this->recreate ) {
 673                         wfProfileOut( "$fname-checks" );
 674                         wfProfileOut( $fname );
 675                         return true;
 676                 }
 677
 678                 wfProfileOut( "$fname-checks" );
 679
 680                 # If article is new, insert it.
 681                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 682                 if ( 0 == $aid ) {
 683                         // Late check for create permission, just in case *PARANOIA*
 684                         if ( !$this->mTitle->userCanCreate() ) {
 685                                 wfDebug( "$fname: no create permission\n" );
 686                                 $this->noCreatePermission();
 687                                 wfProfileOut( $fname );
 688                                 return;
 689                         }
 690
 691                         # Don't save a new article if it's blank.
 692                         if ( ( '' == $this->textbox1 ) ) {
 693                                         $wgOut->redirect( $this->mTitle->getFullURL() );
 694                                         wfProfileOut( $fname );
 695                                         return false;
 696                         }
 697
 698                         $isComment=($this->section=='new');
 699                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 700                                 $this->minoredit, $this->watchthis, false, $isComment);
 701
 702                         wfProfileOut( $fname );
 703                         return false;
 704                 }
 705
 706                 # Article exists. Check for edit conflict.
 707
 708                 $this->mArticle->clear(); # Force reload of dates, etc.
 709                 $this->mArticle->forUpdate( true ); # Lock the article
 710
 711                 if( $this->mArticle->getTimestamp() != $this->edittime ) {
 712                         $this->isConflict = true;
 713                         if( $this->section == 'new' ) {
 714                                 if( $this->mArticle->getUserText() == $wgUser->getName() &&
 715                                         $this->mArticle->getComment() == $this->summary ) {
 716                                         // Probably a duplicate submission of a new comment.
 717                                         // This can happen when squid resends a request after
 718                                         // a timeout but the first one actually went through.
 719                                         wfDebug( "EditPage::editForm duplicate new section submission; trigger edit conflict!\n" );
 720                                 } else {
 721                                         // New comment; suppress conflict.
 722                                         $this->isConflict = false;
 723                                         wfDebug( "EditPage::editForm conflict suppressed; new section\n" );
 724                                 }
 725                         }
 726                 }
 727                 $userid = $wgUser->getID();
 728
 729                 if ( $this->isConflict) {
 730                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 731                                 $this->mArticle->getTimestamp() . "'\n" );
 732                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime);
 733                 }
 734                 else {
 735                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 736                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary);
 737                 }
 738                 if( is_null( $text ) ) {
 739                         wfDebug( "EditPage::editForm activating conflict; section replace failed.\n" );
 740                         $this->isConflict = true;
 741                         $text = $this->textbox1;
 742                 }
 743
 744                 # Suppress edit conflict with self, except for section edits where merging is required.
 745                 if ( ( $this->section == '' ) && ( 0 != $userid ) && ( $this->mArticle->getUser() == $userid ) ) {
 746                         wfDebug( "Suppressing edit conflict, same user.\n" );
 747                         $this->isConflict = false;
 748                 } else {
 749                         # switch from section editing to normal editing in edit conflict
 750                         if($this->isConflict) {
 751                                 # Attempt merge
 752                                 if( $this->mergeChangesInto( $text ) ){
 753                                         // Successful merge! Maybe we should tell the user the good news?
 754                                         $this->isConflict = false;
 755                                         wfDebug( "Suppressing edit conflict, successful merge.\n" );
 756                                 } else {
 757                                         $this->section = '';
 758                                         $this->textbox1 = $text;
 759                                         wfDebug( "Keeping edit conflict, failed merge.\n" );
 760                                 }
 761                         }
 762                 }
 763
 764                 if ( $this->isConflict ) {
 765                         wfProfileOut( $fname );
 766                         return true;
 767                 }
 768
 769                 $oldtext = $this->mArticle->getContent();
 770
 771                 # Handle the user preference to force summaries here, but not for null edits
 772                 if( $this->section != 'new' && !$this->allowBlankSummary && $wgUser->getOption( 'forceeditsummary')
 773                         &&  0 != strcmp($oldtext, $text) && !Article::getRedirectAutosummary( $text )) {
 774                         if( md5( $this->summary ) == $this->autoSumm ) {
 775                                 $this->missingSummary = true;
 776                                 wfProfileOut( $fname );
 777                                 return( true );
 778                         }
 779                 }
 780
 781                 #And a similar thing for new sections
 782                 if( $this->section == 'new' && !$this->allowBlankSummary && $wgUser->getOption( 'forceeditsummary' ) ) {
 783                         if (trim($this->summary) == '') {
 784                                 $this->missingSummary = true;
 785                                 wfProfileOut( $fname );
 786                                 return( true );
 787                         }
 788                 }
 789
 790                 # All's well
 791                 wfProfileIn( "$fname-sectionanchor" );
 792                 $sectionanchor = '';
 793                 if( $this->section == 'new' ) {
 794                         if ( $this->textbox1 == '' ) {
 795                                 $this->missingComment = true;
 796                                 return true;
 797                         }
 798                         if( $this->summary != '' ) {
 799                                 $sectionanchor = $this->sectionAnchor( $this->summary );
 800                         }
 801                 } elseif( $this->section != '' ) {
 802                         # Try to get a section anchor from the section source, redirect to edited section if header found
 803                         # XXX: might be better to integrate this into Article::replaceSection
 804                         # for duplicate heading checking and maybe parsing
 805                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 806                         # we can't deal with anchors, includes, html etc in the header for now,
 807                         # headline would need to be parsed to improve this
 808                         if($hasmatch and strlen($matches[2]) > 0) {
 809                                 $sectionanchor = $this->sectionAnchor( $matches[2] );
 810                         }
 811                 }
 812                 wfProfileOut( "$fname-sectionanchor" );
 813
 814                 // Save errors may fall down to the edit form, but we've now
 815                 // merged the section into full text. Clear the section field
 816                 // so that later submission of conflict forms won't try to
 817                 // replace that into a duplicated mess.
 818                 $this->textbox1 = $text;
 819                 $this->section = '';
 820
 821                 // Check for length errors again now that the section is merged in
 822                 $this->kblength = (int)(strlen( $text ) / 1024);
 823                 if ( $this->kblength > $wgMaxArticleSize ) {
 824                         $this->tooBig = true;
 825                         wfProfileOut( $fname );
 826                         return true;
 827                 }
 828
 829                 # update the article here
 830                 if( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
 831                         $this->watchthis, '', $sectionanchor ) ) {
 832                         wfProfileOut( $fname );
 833                         return false;
 834                 } else {
 835                         $this->isConflict = true;
 836                 }
 837                 wfProfileOut( $fname );
 838                 return true;
 839         }
 840
 841         /**
 842          * Initialise form fields in the object
 843          * Called on the first invocation, e.g. when a user clicks an edit link
 844          */
 845         function initialiseForm() {
 846                 $this->edittime = $this->mArticle->getTimestamp();
 847                 $this->textbox1 = $this->getContent();
 848                 $this->summary = '';
 849                 if ( !$this->mArticle->exists() && $this->mArticle->mTitle->getNamespace() == NS_MEDIAWIKI )
 850                         $this->textbox1 = wfMsgWeirdKey( $this->mArticle->mTitle->getText() ) ;
 851                 wfProxyCheck();
 852         }
 853
 854         /**
 855          * Send the edit form and related headers to $wgOut
 856          * @param $formCallback Optional callable that takes an OutputPage
 857          *                      parameter; will be called during form output
 858          *                      near the top, for captchas and the like.
 859          */
 860         function showEditForm( $formCallback=null ) {
 861                 global $wgOut, $wgUser, $wgLang, $wgContLang, $wgMaxArticleSize;
 862
 863                 $fname = 'EditPage::showEditForm';
 864                 wfProfileIn( $fname );
 865
 866                 $sk =& $wgUser->getSkin();
 867
 868                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) ) ;
 869
 870                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 871
 872                 # Enabled article-related sidebar, toplinks, etc.
 873                 $wgOut->setArticleRelated( true );
 874
 875                 if ( $this->isConflict ) {
 876                         $s = wfMsg( 'editconflict', $this->mTitle->getPrefixedText() );
 877                         $wgOut->setPageTitle( $s );
 878                         $wgOut->addWikiText( wfMsg( 'explainconflict' ) );
 879
 880                         $this->textbox2 = $this->textbox1;
 881                         $this->textbox1 = $this->getContent();
 882                         $this->edittime = $this->mArticle->getTimestamp();
 883                 } else {
 884
 885                         if( $this->section != '' ) {
 886                                 if( $this->section == 'new' ) {
 887                                         $s = wfMsg('editingcomment', $this->mTitle->getPrefixedText() );
 888                                 } else {
 889                                         $s = wfMsg('editingsection', $this->mTitle->getPrefixedText() );
 890                                         $matches = array();
 891                                         if( !$this->summary && !$this->preview && !$this->diff ) {
 892                                                 preg_match( "/^(=+)(.+)\\1/mi",
 893                                                         $this->textbox1,
 894                                                         $matches );
 895                                                 if( !empty( $matches[2] ) ) {
 896                                                         $this->summary = "/* ". trim($matches[2])." */ ";
 897                                                 }
 898                                         }
 899                                 }
 900                         } else {
 901                                 $s = wfMsg( 'editing', $this->mTitle->getPrefixedText() );
 902                         }
 903                         $wgOut->setPageTitle( $s );
 904
 905                         if ( $this->missingComment ) {
 906                                 $wgOut->addWikiText( wfMsg( 'missingcommenttext' ) );
 907                         }
 908
 909                         if( $this->missingSummary && $this->section != 'new' ) {
 910                                 $wgOut->addWikiText( wfMsg( 'missingsummary' ) );
 911                         }
 912
 913                         if( $this->missingSummary && $this->section == 'new' ) {
 914                                 $wgOut->addWikiText( wfMsg( 'missingcommentheader' ) );
 915                         }
 916
 917                         if( !$this->hookError == '' ) {
 918                                 $wgOut->addWikiText( $this->hookError );
 919                         }
 920
 921                         if ( !$this->checkUnicodeCompliantBrowser() ) {
 922                                 $wgOut->addWikiText( wfMsg( 'nonunicodebrowser') );
 923                         }
 924                         if ( isset( $this->mArticle )
 925                              && isset( $this->mArticle->mRevision )
 926                              && !$this->mArticle->mRevision->isCurrent() ) {
 927                                 $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
 928                                 $wgOut->addWikiText( wfMsg( 'editingold' ) );
 929                         }
 930                 }
 931
 932                 if( wfReadOnly() ) {
 933                         $wgOut->addWikiText( wfMsg( 'readonlywarning' ) );
 934                 } elseif( $wgUser->isAnon() && $this->formtype != 'preview' ) {
 935                         $wgOut->addWikiText( wfMsg( 'anoneditwarning' ) );
 936                 } else {
 937                         if( $this->isCssJsSubpage && $this->formtype != 'preview' ) {
 938                                 # Check the skin exists
 939                                 if( $this->isValidCssJsSubpage ) {
 940                                         $wgOut->addWikiText( wfMsg( 'usercssjsyoucanpreview' ) );
 941                                 } else {
 942                                         $wgOut->addWikiText( wfMsg( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
 943                                 }
 944                         }
 945                 }
 946
 947                 if( $this->mTitle->isProtected( 'edit' ) ) {
 948                         # Is the protection due to the namespace, e.g. interface text?
 949                         if( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 950                                 # Yes; remind the user
 951                                 $notice = wfMsg( 'editinginterface' );
 952                         } elseif( $this->mTitle->isSemiProtected() ) {
 953                                 # No; semi protected
 954                                 $notice = wfMsg( 'semiprotectedpagewarning' );
 955                                 if( wfEmptyMsg( 'semiprotectedpagewarning', $notice ) || $notice == '-' ) {
 956                                         $notice = '';
 957                                 }
 958                         } else {
 959                                 # No; regular protection
 960                                 $notice = wfMsg( 'protectedpagewarning' );
 961                         }
 962                         $wgOut->addWikiText( $notice );
 963                 }
 964
 965                 if ( $this->kblength === false ) {
 966                         $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 967                 }
 968                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
 969                         $wgOut->addWikiText( wfMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgMaxArticleSize ) );
 970                 } elseif( $this->kblength > 29 ) {
 971                         $wgOut->addWikiText( wfMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) ) );
 972                 }
 973
 974                 #need to parse the preview early so that we know which templates are used,
 975                 #otherwise users with "show preview after edit box" will get a blank list
 976                 $previewOutput = $this->getPreviewText();
 977
 978                 $rows = $wgUser->getIntOption( 'rows' );
 979                 $cols = $wgUser->getIntOption( 'cols' );
 980
 981                 $ew = $wgUser->getOption( 'editwidth' );
 982                 if ( $ew ) $ew = " style=\"width:100%\"";
 983                 else $ew = '';
 984
 985                 $q = 'action=submit';
 986                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
 987                 $action = $this->mTitle->escapeLocalURL( $q );
 988
 989                 $summary = wfMsg('summary');
 990                 $subject = wfMsg('subject');
 991                 $minor   = wfMsgExt('minoredit', array('parseinline'));
 992                 $watchthis = wfMsgExt('watchthis', array('parseinline'));
 993
 994                 $cancel = $sk->makeKnownLink( $this->mTitle->getPrefixedText(),
 995                                 wfMsgExt('cancel', array('parseinline')) );
 996                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ));
 997                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
 998                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
 999                         htmlspecialchars( wfMsg( 'newwindow' ) );
1000
1001                 global $wgRightsText;
1002                 $copywarn = "<div id=\"editpage-copywarn\">\n" .
1003                         wfMsg( $wgRightsText ? 'copyrightwarning' : 'copyrightwarning2',
1004                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
1005                                 $wgRightsText ) . "\n</div>";
1006
1007                 if( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
1008                         # prepare toolbar for edit buttons
1009                         $toolbar = $this->getEditToolbar();
1010                 } else {
1011                         $toolbar = '';
1012                 }
1013
1014                 // activate checkboxes if user wants them to be always active
1015                 if( !$this->preview && !$this->diff ) {
1016                         # Sort out the "watch" checkbox
1017                         if( $wgUser->getOption( 'watchdefault' ) ) {
1018                                 # Watch all edits
1019                                 $this->watchthis = true;
1020                         } elseif( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1021                                 # Watch creations
1022                                 $this->watchthis = true;
1023                         } elseif( $this->mTitle->userIsWatching() ) {
1024                                 # Already watched
1025                                 $this->watchthis = true;
1026                         }
1027
1028                         if( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
1029                 }
1030
1031                 $minoredithtml = '';
1032
1033                 if ( $wgUser->isAllowed('minoredit') ) {
1034                         $minoredithtml =
1035                                 "<input tabindex='3' type='checkbox' value='1' name='wpMinoredit'".($this->minoredit?" checked='checked'":"").
1036                                 " accesskey='".wfMsg('accesskey-minoredit')."' id='wpMinoredit' />\n".
1037                                 "<label for='wpMinoredit' title='".wfMsg('tooltip-minoredit')."'>{$minor}</label>\n";
1038                 }
1039
1040                 $watchhtml = '';
1041
1042                 if ( $wgUser->isLoggedIn() ) {
1043                         $watchhtml = "<input tabindex='4' type='checkbox' name='wpWatchthis'".
1044                                 ($this->watchthis?" checked='checked'":"").
1045                                 " accesskey=\"".htmlspecialchars(wfMsg('accesskey-watch'))."\" id='wpWatchthis'  />\n".
1046                                 "<label for='wpWatchthis' title=\"" .
1047                                         htmlspecialchars(wfMsg('tooltip-watch'))."\">{$watchthis}</label>\n";
1048                 }
1049
1050                 $checkboxhtml = $minoredithtml . $watchhtml;
1051
1052                 $wgOut->addHTML( $this->editFormPageTop );
1053
1054                 if ( $wgUser->getOption( 'previewontop' ) ) {
1055
1056                         if ( 'preview' == $this->formtype ) {
1057                                 $this->showPreview( $previewOutput );
1058                         } else {
1059                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
1060                         }
1061
1062                         if ( 'diff' == $this->formtype ) {
1063                                 $wgOut->addHTML( $this->getDiff() );
1064                         }
1065                 }
1066
1067
1068                 $wgOut->addHTML( $this->editFormTextTop );
1069
1070                 # if this is a comment, show a subject line at the top, which is also the edit summary.
1071                 # Otherwise, show a summary field at the bottom
1072                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
1073                 if( $this->section == 'new' ) {
1074                         $commentsubject="<span id='wpSummaryLabel'><label for='wpSummary'>{$subject}:</label></span>\n<div class='editOptions'>\n<input tabindex='1' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
1075                         $editsummary = '';
1076                         $subjectpreview = $summarytext && $this->preview ? "<div class=\"mw-summary-preview\">".wfMsg('subject-preview').':'.$sk->commentBlock( $this->summary, $this->mTitle )."</div>\n" : '';
1077                         $summarypreview = '';
1078                 } else {
1079                         $commentsubject = '';
1080                         $editsummary="<span id='wpSummaryLabel'><label for='wpSummary'>{$summary}:</label></span>\n<div class='editOptions'>\n<input tabindex='2' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
1081                         $summarypreview = $summarytext && $this->preview ? "<div class=\"mw-summary-preview\">".wfMsg('summary-preview').':'.$sk->commentBlock( $this->summary, $this->mTitle )."</div>\n" : '';
1082                         $subjectpreview = '';
1083                 }
1084
1085                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
1086                 if( !$this->preview && !$this->diff ) {
1087                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
1088                 }
1089                 $templates = ($this->preview || $this->section) ? $this->mPreviewTemplates : $this->mArticle->getUsedTemplates();
1090                 $formattedtemplates = $sk->formatTemplates( $templates, $this->preview, $this->section != '');
1091
1092                 global $wgUseMetadataEdit ;
1093                 if ( $wgUseMetadataEdit ) {
1094                         $metadata = $this->mMetaData ;
1095                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
1096                         $top = wfMsgWikiHtml( 'metadata_help' );
1097                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
1098                 }
1099                 else $metadata = "" ;
1100
1101                 $hidden = '';
1102                 $recreate = '';
1103                 if ($this->deletedSinceEdit) {
1104                         if ( 'save' != $this->formtype ) {
1105                                 $wgOut->addWikiText( wfMsg('deletedwhileediting'));
1106                         } else {
1107                                 // Hide the toolbar and edit area, use can click preview to get it back
1108                                 // Add an confirmation checkbox and explanation.
1109                                 $toolbar = '';
1110                                 $hidden = 'type="hidden" style="display:none;"';
1111                                 $recreate = $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ));
1112                                 $recreate .=
1113                                         "<br /><input tabindex='1' type='checkbox' value='1' name='wpRecreate' id='wpRecreate' />".
1114                                         "<label for='wpRecreate' title='".wfMsg('tooltip-recreate')."'>". wfMsg('recreate')."</label>";
1115                         }
1116                 }
1117
1118                 $temp = array(
1119                         'id'        => 'wpSave',
1120                         'name'      => 'wpSave',
1121                         'type'      => 'submit',
1122                         'tabindex'  => '5',
1123                         'value'     => wfMsg('savearticle'),
1124                         'accesskey' => wfMsg('accesskey-save'),
1125                         'title'     => wfMsg('tooltip-save'),
1126                 );
1127                 $buttons['save'] = wfElement('input', $temp, '');
1128                 $temp = array(
1129                         'id'        => 'wpDiff',
1130                         'name'      => 'wpDiff',
1131                         'type'      => 'submit',
1132                         'tabindex'  => '7',
1133                         'value'     => wfMsg('showdiff'),
1134                         'accesskey' => wfMsg('accesskey-diff'),
1135                         'title'     => wfMsg('tooltip-diff'),
1136                 );
1137                 $buttons['diff'] = wfElement('input', $temp, '');
1138
1139                 global $wgLivePreview;
1140                 if ( $wgLivePreview && $wgUser->getOption( 'uselivepreview' ) ) {
1141                         $temp = array(
1142                                 'id'        => 'wpPreview',
1143                                 'name'      => 'wpPreview',
1144                                 'type'      => 'submit',
1145                                 'tabindex'  => '6',
1146                                 'value'     => wfMsg('showpreview'),
1147                                 'accesskey' => '',
1148                                 'title'     => wfMsg('tooltip-preview'),
1149                                 'style'     => 'display: none;',
1150                         );
1151                         $buttons['preview'] = wfElement('input', $temp, '');
1152                         $temp = array(
1153                                 'id'        => 'wpLivePreview',
1154                                 'name'      => 'wpLivePreview',
1155                                 'type'      => 'submit',
1156                                 'tabindex'  => '6',
1157                                 'value'     => wfMsg('showlivepreview'),
1158                                 'accesskey' => wfMsg('accesskey-preview'),
1159                                 'title'     => '',
1160                                 'onclick'   => $this->doLivePreviewScript(),
1161                         );
1162                         $buttons['live'] = wfElement('input', $temp, '');
1163                 } else {
1164                         $temp = array(
1165                                 'id'        => 'wpPreview',
1166                                 'name'      => 'wpPreview',
1167                                 'type'      => 'submit',
1168                                 'tabindex'  => '6',
1169                                 'value'     => wfMsg('showpreview'),
1170                                 'accesskey' => wfMsg('accesskey-preview'),
1171                                 'title'     => wfMsg('tooltip-preview'),
1172                         );
1173                         $buttons['preview'] = wfElement('input', $temp, '');
1174                         $buttons['live'] = '';
1175                 }
1176
1177                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
1178                         ? ""
1179                         : "<input type='hidden' name=\"safemode\" value='1' />\n";
1180
1181                 $wgOut->addHTML( <<<END
1182 {$toolbar}
1183 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1184 END
1185 );
1186
1187                 if( is_callable( $formCallback ) ) {
1188                         call_user_func_array( $formCallback, array( &$wgOut ) );
1189                 }
1190
1191                 // Put these up at the top to ensure they aren't lost on early form submission
1192                 $wgOut->addHTML( "
1193 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
1194 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
1195 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
1196 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
1197
1198                 $wgOut->addHTML( <<<END
1199 $recreate
1200 {$commentsubject}
1201 {$subjectpreview}
1202 <textarea tabindex='1' accesskey="," name="wpTextbox1" id="wpTextbox1" rows='{$rows}'
1203 cols='{$cols}'{$ew} $hidden>
1204 END
1205 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox1 ) ) .
1206 "
1207 </textarea>
1208                 " );
1209
1210                 $wgOut->addWikiText( $copywarn );
1211                 $wgOut->addHTML( $this->editFormTextAfterWarn );
1212                 $wgOut->addHTML( "
1213 {$metadata}
1214 {$editsummary}
1215 {$summarypreview}
1216 {$checkboxhtml}
1217 {$safemodehtml}
1218 ");
1219
1220                 $wgOut->addHTML(
1221 "<div class='editButtons'>
1222         {$buttons['save']}
1223         {$buttons['preview']}
1224         {$buttons['live']}
1225         {$buttons['diff']}
1226         <span class='editHelp'>{$cancel} | {$edithelp}</span>
1227 </div><!-- editButtons -->
1228 </div><!-- editOptions -->");
1229
1230                 $wgOut->addWikiText( wfMsgForContent( 'edittools' ) );
1231                 $wgOut->addHTML( $this->editFormTextAfterTools );
1232
1233                 $wgOut->addHTML( "
1234 <div class='templatesUsed'>
1235 {$formattedtemplates}
1236 </div>
1237 " );
1238
1239                 if ( $wgUser->isLoggedIn() ) {
1240                         /**
1241                          * To make it harder for someone to slip a user a page
1242                          * which submits an edit form to the wiki without their
1243                          * knowledge, a random token is associated with the login
1244                          * session. If it's not passed back with the submission,
1245                          * we won't save the page, or render user JavaScript and
1246                          * CSS previews.
1247                          */
1248                         $token = htmlspecialchars( $wgUser->editToken() );
1249                         $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
1250                 }
1251
1252                 # If a blank edit summary was previously provided, and the appropriate
1253                 # user preference is active, pass a hidden tag here. This will stop the
1254                 # user being bounced back more than once in the event that a summary
1255                 # is not required.
1256                 if( $this->missingSummary ) {
1257                         $wgOut->addHTML( "<input type=\"hidden\" name=\"wpIgnoreBlankSummary\" value=\"1\" />\n" );
1258                 }
1259
1260                 # For a bit more sophisticated detection of blank summaries, hash the
1261                 # automatic one and pass that in a hidden field.
1262                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1263                 $wgOut->addHtml( wfHidden( 'wpAutoSummary', $autosumm ) );
1264
1265                 if ( $this->isConflict ) {
1266                         $wgOut->addWikiText( '==' . wfMsg( "yourdiff" ) . '==' );
1267
1268                         $de = new DifferenceEngine( $this->mTitle );
1269                         $de->setText( $this->textbox2, $this->textbox1 );
1270                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1271
1272                         $wgOut->addWikiText( '==' . wfMsg( "yourtext" ) . '==' );
1273                         $wgOut->addHTML( "<textarea tabindex=6 id='wpTextbox2' name=\"wpTextbox2\" rows='{$rows}' cols='{$cols}' wrap='virtual'>"
1274                                 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox2 ) ) . "\n</textarea>" );
1275                 }
1276                 $wgOut->addHTML( $this->editFormTextBottom );
1277                 $wgOut->addHTML( "</form>\n" );
1278                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1279
1280                         if ( $this->formtype == 'preview') {
1281                                 $this->showPreview( $previewOutput );
1282                         } else {
1283                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
1284                         }
1285
1286                         if ( $this->formtype == 'diff') {
1287                                 $wgOut->addHTML( $this->getDiff() );
1288                         }
1289
1290                 }
1291
1292                 wfProfileOut( $fname );
1293         }
1294
1295         /**
1296          * Append preview output to $wgOut.
1297          * Includes category rendering if this is a category page.
1298          *
1299          * @param string $text The HTML to be output for the preview.
1300          */
1301         private function showPreview( $text ) {
1302                 global $wgOut;
1303
1304                 $wgOut->addHTML( '<div id="wikiPreview">' );
1305                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1306                         $this->mArticle->openShowCategory();
1307                 }
1308                 $wgOut->addHTML( $text );
1309                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1310                         $this->mArticle->closeShowCategory();
1311                 }
1312                 $wgOut->addHTML( '</div>' );
1313         }
1314
1315         /**
1316          * Live Preview lets us fetch rendered preview page content and
1317          * add it to the page without refreshing the whole page.
1318          * If not supported by the browser it will fall through to the normal form
1319          * submission method.
1320          *
1321          * This function outputs a script tag to support live preview, and
1322          * returns an onclick handler which should be added to the attributes
1323          * of the preview button
1324          */
1325         function doLivePreviewScript() {
1326                 global $wgStylePath, $wgJsMimeType, $wgStyleVersion, $wgOut, $wgTitle;
1327                 $wgOut->addHTML( '<script type="'.$wgJsMimeType.'" src="' .
1328                         htmlspecialchars( "$wgStylePath/common/preview.js?$wgStyleVersion" ) .
1329                         '"></script>' . "\n" );
1330                 $liveAction = $wgTitle->getLocalUrl( 'action=submit&wpPreview=true&live=true' );
1331                 return "return !livePreview(" .
1332                         "getElementById('wikiPreview')," .
1333                         "editform.wpTextbox1.value," .
1334                         '"' . $liveAction . '"' . ")";
1335         }
1336
1337         function getLastDelete() {
1338                 $dbr =& wfGetDB( DB_SLAVE );
1339                 $fname = 'EditPage::getLastDelete';
1340                 $res = $dbr->select(
1341                         array( 'logging', 'user' ),
1342                         array( 'log_type',
1343                                'log_action',
1344                                'log_timestamp',
1345                                'log_user',
1346                                'log_namespace',
1347                                'log_title',
1348                                'log_comment',
1349                                'log_params',
1350                                'user_name', ),
1351                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1352                                'log_title' => $this->mTitle->getDBkey(),
1353                                'log_type' => 'delete',
1354                                'log_action' => 'delete',
1355                                'user_id=log_user' ),
1356                         $fname,
1357                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
1358
1359                 if($dbr->numRows($res) == 1) {
1360                         while ( $x = $dbr->fetchObject ( $res ) )
1361                                 $data = $x;
1362                         $dbr->freeResult ( $res ) ;
1363                 } else {
1364                         $data = null;
1365                 }
1366                 return $data;
1367         }
1368
1369         /**
1370          * @todo document
1371          */
1372         function getPreviewText() {
1373                 global $wgOut, $wgUser, $wgTitle, $wgParser;
1374
1375                 $fname = 'EditPage::getPreviewText';
1376                 wfProfileIn( $fname );
1377
1378                 if ( $this->mTriedSave && !$this->mTokenOk ) {
1379                         $msg = 'session_fail_preview';
1380                 } else {
1381                         $msg = 'previewnote';
1382                 }
1383                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
1384                         "<div class='previewnote'>" . $wgOut->parse( wfMsg( $msg ) ) . "</div>\n";
1385                 if ( $this->isConflict ) {
1386                         $previewhead.='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1387                 }
1388
1389                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1390                 $parserOptions->setEditSection( false );
1391
1392                 global $wgRawHtml;
1393                 if( $wgRawHtml && !$this->mTokenOk ) {
1394                         // Could be an offsite preview attempt. This is very unsafe if
1395                         // HTML is enabled, as it could be an attack.
1396                         return $wgOut->parse( "<div class='previewnote'>" .
1397                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1398                 }
1399
1400                 # don't parse user css/js, show message about preview
1401                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1402
1403                 if ( $this->isCssJsSubpage ) {
1404                         if(preg_match("/\\.css$/", $wgTitle->getText() ) ) {
1405                                 $previewtext = wfMsg('usercsspreview');
1406                         } else if(preg_match("/\\.js$/", $wgTitle->getText() ) ) {
1407                                 $previewtext = wfMsg('userjspreview');
1408                         }
1409                         $parserOptions->setTidy(true);
1410                         $parserOutput = $wgParser->parse( $previewtext , $wgTitle, $parserOptions );
1411                         $wgOut->addHTML( $parserOutput->mText );
1412                         wfProfileOut( $fname );
1413                         return $previewhead;
1414                 } else {
1415                         $toparse = $this->textbox1;
1416
1417                         # If we're adding a comment, we need to show the
1418                         # summary as the headline
1419                         if($this->section=="new" && $this->summary!="") {
1420                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1421                         }
1422
1423                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData ;
1424                         $parserOptions->setTidy(true);
1425                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ) ."\n\n",
1426                                         $wgTitle, $parserOptions );
1427
1428                         $previewHTML = $parserOutput->getText();
1429                         $wgOut->addParserOutputNoText( $parserOutput );
1430
1431                         foreach ( $parserOutput->getTemplates() as $ns => $template)
1432                                 foreach ( array_keys( $template ) as $dbk)
1433                                         $this->mPreviewTemplates[] = Title::makeTitle($ns, $dbk);
1434
1435                         wfProfileOut( $fname );
1436                         return $previewhead . $previewHTML;
1437                 }
1438         }
1439
1440         /**
1441          * Call the stock "user is blocked" page
1442          */
1443         function blockedPage() {
1444                 global $wgOut, $wgUser;
1445                 $wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
1446
1447                 # If the user made changes, preserve them when showing the markup
1448                 # (This happens when a user is blocked during edit, for instance)
1449                 $first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
1450                 if( $first ) {
1451                         $source = $this->mTitle->exists() ? $this->getContent() : false;
1452                 } else {
1453                         $source = $this->textbox1;
1454                 }
1455
1456                 # Spit out the source or the user's modified version
1457                 if( $source !== false ) {
1458                         $rows = $wgUser->getOption( 'rows' );
1459                         $cols = $wgUser->getOption( 'cols' );
1460                         $attribs = array( 'id' => 'wpTextbox1', 'name' => 'wpTextbox1', 'cols' => $cols, 'rows' => $rows, 'readonly' => 'readonly' );
1461                         $wgOut->addHtml( '<hr />' );
1462                         $wgOut->addWikiText( wfMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() ) );
1463                         $wgOut->addHtml( wfOpenElement( 'textarea', $attribs ) . htmlspecialchars( $source ) . wfCloseElement( 'textarea' ) );
1464                 }
1465         }
1466
1467         /**
1468          * Produce the stock "please login to edit pages" page
1469          */
1470         function userNotLoggedInPage() {
1471                 global $wgUser, $wgOut;
1472                 $skin = $wgUser->getSkin();
1473
1474                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1475                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $this->mTitle->getPrefixedUrl() );
1476
1477                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1478                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1479                 $wgOut->setArticleRelated( false );
1480
1481                 $wgOut->addHtml( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
1482                 $wgOut->returnToMain( false, $this->mTitle->getPrefixedUrl() );
1483         }
1484
1485         /**
1486          * Creates a basic error page which informs the user that
1487          * they have to validate their email address before being
1488          * allowed to edit.
1489          */
1490         function userNotConfirmedPage() {
1491                 global $wgOut;
1492
1493                 $wgOut->setPageTitle( wfMsg( 'confirmedittitle' ) );
1494                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1495                 $wgOut->setArticleRelated( false );
1496
1497                 $wgOut->addWikiText( wfMsg( 'confirmedittext' ) );
1498                 $wgOut->returnToMain( false );
1499         }
1500
1501         /**
1502          * Produce the stock "your edit contains spam" page
1503          *
1504          * @param $match Text which triggered one or more filters
1505          */
1506         function spamPage( $match = false ) {
1507                 global $wgOut;
1508
1509                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1510                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1511                 $wgOut->setArticleRelated( false );
1512
1513                 $wgOut->addWikiText( wfMsg( 'spamprotectiontext' ) );
1514                 if ( $match )
1515                         $wgOut->addWikiText( wfMsg( 'spamprotectionmatch', "<nowiki>{$match}</nowiki>" ) );
1516
1517                 $wgOut->returnToMain( false );
1518         }
1519
1520         /**
1521          * @private
1522          * @todo document
1523          */
1524         function mergeChangesInto( &$editText ){
1525                 $fname = 'EditPage::mergeChangesInto';
1526                 wfProfileIn( $fname );
1527
1528                 $db =& wfGetDB( DB_MASTER );
1529
1530                 // This is the revision the editor started from
1531                 $baseRevision = Revision::loadFromTimestamp(
1532                         $db, $this->mArticle->mTitle, $this->edittime );
1533                 if( is_null( $baseRevision ) ) {
1534                         wfProfileOut( $fname );
1535                         return false;
1536                 }
1537                 $baseText = $baseRevision->getText();
1538
1539                 // The current state, we want to merge updates into it
1540                 $currentRevision =  Revision::loadFromTitle(
1541                         $db, $this->mArticle->mTitle );
1542                 if( is_null( $currentRevision ) ) {
1543                         wfProfileOut( $fname );
1544                         return false;
1545                 }
1546                 $currentText = $currentRevision->getText();
1547
1548                 $result = '';
1549                 if( wfMerge( $baseText, $editText, $currentText, $result ) ){
1550                         $editText = $result;
1551                         wfProfileOut( $fname );
1552                         return true;
1553                 } else {
1554                         wfProfileOut( $fname );
1555                         return false;
1556                 }
1557         }
1558
1559         /**
1560          * Check if the browser is on a blacklist of user-agents known to
1561          * mangle UTF-8 data on form submission. Returns true if Unicode
1562          * should make it through, false if it's known to be a problem.
1563          * @return bool
1564          * @private
1565          */
1566         function checkUnicodeCompliantBrowser() {
1567                 global $wgBrowserBlackList;
1568                 if( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
1569                         // No User-Agent header sent? Trust it by default...
1570                         return true;
1571                 }
1572                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1573                 foreach ( $wgBrowserBlackList as $browser ) {
1574                         if ( preg_match($browser, $currentbrowser) ) {
1575                                 return false;
1576                         }
1577                 }
1578                 return true;
1579         }
1580
1581         /**
1582          * Format an anchor fragment as it would appear for a given section name
1583          * @param string $text
1584          * @return string
1585          * @private
1586          */
1587         function sectionAnchor( $text ) {
1588                 $headline = Sanitizer::decodeCharReferences( $text );
1589                 # strip out HTML
1590                 $headline = preg_replace( '/<.*?' . '>/', '', $headline );
1591                 $headline = trim( $headline );
1592                 $sectionanchor = '#' . urlencode( str_replace( ' ', '_', $headline ) );
1593                 $replacearray = array(
1594                         '%3A' => ':',
1595                         '%' => '.'
1596                 );
1597                 return str_replace(
1598                         array_keys( $replacearray ),
1599                         array_values( $replacearray ),
1600                         $sectionanchor );
1601         }
1602
1603         /**
1604          * Shows a bulletin board style toolbar for common editing functions.
1605          * It can be disabled in the user preferences.
1606          * The necessary JavaScript code can be found in style/wikibits.js.
1607          */
1608         function getEditToolbar() {
1609                 global $wgStylePath, $wgContLang, $wgJsMimeType;
1610
1611                 /**
1612                  * toolarray an array of arrays which each include the filename of
1613                  * the button image (without path), the opening tag, the closing tag,
1614                  * and optionally a sample text that is inserted between the two when no
1615                  * selection is highlighted.
1616                  * The tip text is shown when the user moves the mouse over the button.
1617                  *
1618                  * Already here are accesskeys (key), which are not used yet until someone
1619                  * can figure out a way to make them work in IE. However, we should make
1620                  * sure these keys are not defined on the edit page.
1621                  */
1622                 $toolarray=array(
1623                         array(  'image'=>'button_bold.png',
1624                                         'open'  =>      "\'\'\'",
1625                                         'close' =>      "\'\'\'",
1626                                         'sample'=>      wfMsg('bold_sample'),
1627                                         'tip'   =>      wfMsg('bold_tip'),
1628                                         'key'   =>      'B'
1629                                 ),
1630                         array(  'image'=>'button_italic.png',
1631                                         'open'  =>      "\'\'",
1632                                         'close' =>      "\'\'",
1633                                         'sample'=>      wfMsg('italic_sample'),
1634                                         'tip'   =>      wfMsg('italic_tip'),
1635                                         'key'   =>      'I'
1636                                 ),
1637                         array(  'image'=>'button_link.png',
1638                                         'open'  =>      '[[',
1639                                         'close' =>      ']]',
1640                                         'sample'=>      wfMsg('link_sample'),
1641                                         'tip'   =>      wfMsg('link_tip'),
1642                                         'key'   =>      'L'
1643                                 ),
1644                         array(  'image'=>'button_extlink.png',
1645                                         'open'  =>      '[',
1646                                         'close' =>      ']',
1647                                         'sample'=>      wfMsg('extlink_sample'),
1648                                         'tip'   =>      wfMsg('extlink_tip'),
1649                                         'key'   =>      'X'
1650                                 ),
1651                         array(  'image'=>'button_headline.png',
1652                                         'open'  =>      "\\n== ",
1653                                         'close' =>      " ==\\n",
1654                                         'sample'=>      wfMsg('headline_sample'),
1655                                         'tip'   =>      wfMsg('headline_tip'),
1656                                         'key'   =>      'H'
1657                                 ),
1658                         array(  'image'=>'button_image.png',
1659                                         'open'  =>      '[['.$wgContLang->getNsText(NS_IMAGE).":",
1660                                         'close' =>      ']]',
1661                                         'sample'=>      wfMsg('image_sample'),
1662                                         'tip'   =>      wfMsg('image_tip'),
1663                                         'key'   =>      'D'
1664                                 ),
1665                         array(  'image' =>'button_media.png',
1666                                         'open'  =>      '[['.$wgContLang->getNsText(NS_MEDIA).':',
1667                                         'close' =>      ']]',
1668                                         'sample'=>      wfMsg('media_sample'),
1669                                         'tip'   =>      wfMsg('media_tip'),
1670                                         'key'   =>      'M'
1671                                 ),
1672                         array(  'image' =>'button_math.png',
1673                                         'open'  =>      "<math>",
1674                                         'close' =>      "<\\/math>",
1675                                         'sample'=>      wfMsg('math_sample'),
1676                                         'tip'   =>      wfMsg('math_tip'),
1677                                         'key'   =>      'C'
1678                                 ),
1679                         array(  'image' =>'button_nowiki.png',
1680                                         'open'  =>      "<nowiki>",
1681                                         'close' =>      "<\\/nowiki>",
1682                                         'sample'=>      wfMsg('nowiki_sample'),
1683                                         'tip'   =>      wfMsg('nowiki_tip'),
1684                                         'key'   =>      'N'
1685                                 ),
1686                         array(  'image' =>'button_sig.png',
1687                                         'open'  =>      '--~~~~',
1688                                         'close' =>      '',
1689                                         'sample'=>      '',
1690                                         'tip'   =>      wfMsg('sig_tip'),
1691                                         'key'   =>      'Y'
1692                                 ),
1693                         array(  'image' =>'button_hr.png',
1694                                         'open'  =>      "\\n----\\n",
1695                                         'close' =>      '',
1696                                         'sample'=>      '',
1697                                         'tip'   =>      wfMsg('hr_tip'),
1698                                         'key'   =>      'R'
1699                                 )
1700                 );
1701                 $toolbar = "<div id='toolbar'>\n";
1702                 $toolbar.="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
1703
1704                 foreach($toolarray as $tool) {
1705
1706                         $image=$wgStylePath.'/common/images/'.$tool['image'];
1707                         $open=$tool['open'];
1708                         $close=$tool['close'];
1709                         $sample = wfEscapeJsString( $tool['sample'] );
1710
1711                         // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
1712                         // Older browsers show a "speedtip" type message only for ALT.
1713                         // Ideally these should be different, realistically they
1714                         // probably don't need to be.
1715                         $tip = wfEscapeJsString( $tool['tip'] );
1716
1717                         #$key = $tool["key"];
1718
1719                         $toolbar.="addButton('$image','$tip','$open','$close','$sample');\n";
1720                 }
1721
1722                 $toolbar.="/*]]>*/\n</script>";
1723                 $toolbar.="\n</div>";
1724                 return $toolbar;
1725         }
1726
1727         /**
1728          * Output preview text only. This can be sucked into the edit page
1729          * via JavaScript, and saves the server time rendering the skin as
1730          * well as theoretically being more robust on the client (doesn't
1731          * disturb the edit box's undo history, won't eat your text on
1732          * failure, etc).
1733          *
1734          * @todo This doesn't include category or interlanguage links.
1735          *       Would need to enhance it a bit, maybe wrap them in XML
1736          *       or something... that might also require more skin
1737          *       initialization, so check whether that's a problem.
1738          */
1739         function livePreview() {
1740                 global $wgOut;
1741                 $wgOut->disable();
1742                 header( 'Content-type: text/xml' );
1743                 header( 'Cache-control: no-cache' );
1744                 # FIXME
1745                 echo $this->getPreviewText( );
1746                 /* To not shake screen up and down between preview and live-preview */
1747                 echo "<br style=\"clear:both;\" />\n";
1748         }
1749
1750
1751         /**
1752          * Get a diff between the current contents of the edit box and the
1753          * version of the page we're editing from.
1754          *
1755          * If this is a section edit, we'll replace the section as for final
1756          * save and then make a comparison.
1757          *
1758          * @return string HTML
1759          */
1760         function getDiff() {
1761                 $oldtext = $this->mArticle->fetchContent();
1762                 $newtext = $this->mArticle->replaceSection(
1763                         $this->section, $this->textbox1, $this->summary, $this->edittime );
1764                 $newtext = $this->mArticle->preSaveTransform( $newtext );
1765                 $oldtitle = wfMsgExt( 'currentrev', array('parseinline') );
1766                 $newtitle = wfMsgExt( 'yourtext', array('parseinline') );
1767                 if ( $oldtext !== false  || $newtext != '' ) {
1768                         $de = new DifferenceEngine( $this->mTitle );
1769                         $de->setText( $oldtext, $newtext );
1770                         $difftext = $de->getDiff( $oldtitle, $newtitle );
1771                 } else {
1772                         $difftext = '';
1773                 }
1774
1775                 return '<div id="wikiDiff">' . $difftext . '</div>';
1776         }
1777
1778         /**
1779          * Filter an input field through a Unicode de-armoring process if it
1780          * came from an old browser with known broken Unicode editing issues.
1781          *
1782          * @param WebRequest $request
1783          * @param string $field
1784          * @return string
1785          * @private
1786          */
1787         function safeUnicodeInput( $request, $field ) {
1788                 $text = rtrim( $request->getText( $field ) );
1789                 return $request->getBool( 'safemode' )
1790                         ? $this->unmakesafe( $text )
1791                         : $text;
1792         }
1793
1794         /**
1795          * Filter an output field through a Unicode armoring process if it is
1796          * going to an old browser with known broken Unicode editing issues.
1797          *
1798          * @param string $text
1799          * @return string
1800          * @private
1801          */
1802         function safeUnicodeOutput( $text ) {
1803                 global $wgContLang;
1804                 $codedText = $wgContLang->recodeForEdit( $text );
1805                 return $this->checkUnicodeCompliantBrowser()
1806                         ? $codedText
1807                         : $this->makesafe( $codedText );
1808         }
1809
1810         /**
1811          * A number of web browsers are known to corrupt non-ASCII characters
1812          * in a UTF-8 text editing environment. To protect against this,
1813          * detected browsers will be served an armored version of the text,
1814          * with non-ASCII chars converted to numeric HTML character references.
1815          *
1816          * Preexisting such character references will have a 0 added to them
1817          * to ensure that round-trips do not alter the original data.
1818          *
1819          * @param string $invalue
1820          * @return string
1821          * @private
1822          */
1823         function makesafe( $invalue ) {
1824                 // Armor existing references for reversability.
1825                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
1826
1827                 $bytesleft = 0;
1828                 $result = "";
1829                 $working = 0;
1830                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1831                         $bytevalue = ord( $invalue{$i} );
1832                         if( $bytevalue <= 0x7F ) { //0xxx xxxx
1833                                 $result .= chr( $bytevalue );
1834                                 $bytesleft = 0;
1835                         } elseif( $bytevalue <= 0xBF ) { //10xx xxxx
1836                                 $working = $working << 6;
1837                                 $working += ($bytevalue & 0x3F);
1838                                 $bytesleft--;
1839                                 if( $bytesleft <= 0 ) {
1840                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
1841                                 }
1842                         } elseif( $bytevalue <= 0xDF ) { //110x xxxx
1843                                 $working = $bytevalue & 0x1F;
1844                                 $bytesleft = 1;
1845                         } elseif( $bytevalue <= 0xEF ) { //1110 xxxx
1846                                 $working = $bytevalue & 0x0F;
1847                                 $bytesleft = 2;
1848                         } else { //1111 0xxx
1849                                 $working = $bytevalue & 0x07;
1850                                 $bytesleft = 3;
1851                         }
1852                 }
1853                 return $result;
1854         }
1855
1856         /**
1857          * Reverse the previously applied transliteration of non-ASCII characters
1858          * back to UTF-8. Used to protect data from corruption by broken web browsers
1859          * as listed in $wgBrowserBlackList.
1860          *
1861          * @param string $invalue
1862          * @return string
1863          * @private
1864          */
1865         function unmakesafe( $invalue ) {
1866                 $result = "";
1867                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1868                         if( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
1869                                 $i += 3;
1870                                 $hexstring = "";
1871                                 do {
1872                                         $hexstring .= $invalue{$i};
1873                                         $i++;
1874                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
1875
1876                                 // Do some sanity checks. These aren't needed for reversability,
1877                                 // but should help keep the breakage down if the editor
1878                                 // breaks one of the entities whilst editing.
1879                                 if ((substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6)) {
1880                                         $codepoint = hexdec($hexstring);
1881                                         $result .= codepointToUtf8( $codepoint );
1882                                 } else {
1883                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
1884                                 }
1885                         } else {
1886                                 $result .= substr( $invalue, $i, 1 );
1887                         }
1888                 }
1889                 // reverse the transform that we made for reversability reasons.
1890                 return strtr( $result, array( "&#x0" => "&#x" ) );
1891         }
1892
1893         function noCreatePermission() {
1894                 global $wgOut;
1895                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
1896                 $wgOut->addWikiText( wfMsg( 'nocreatetext' ) );
1897         }
1898
1899 }
1900
1901 ?>