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
 105                                 #Sanity check, make sure it's the right page.
 106                                 # Otherwise, $text will be left as-is.
 107                                 if (!is_null($undorev) && $undorev->getPage() == $this->mArticle->getID()) {
 108                                         $oldrev = $undorev->getPrevious();
 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                                         } else {
 123                                                 $this->editFormPageTop .= '<h2>'.wfMsg('undosucceeded')."</h2>\n" .
 124                                                                                 '<p>'.wfMsg('explainundosucceeded').'</p>';
 125                                                 $this->summary = wfMsgForContent('undo-summary', $undo, $undorev->getUserText());
 126                                         }
 127                                 }
 128                         }
 129                         else if( $section != '' ) {
 130                                 if( $section == 'new' ) {
 131                                         $text = $this->getPreloadedText( $preload );
 132                                 } else {
 133                                         $text = $wgParser->getSection( $text, $section );
 134                                 }
 135                         }
 136                 }
 137
 138                 wfProfileOut( __METHOD__ );
 139                 return $text;
 140         }
 141
 142         /**
 143          * Get the contents of a page from its title and remove includeonly tags
 144          *
 145          * @param $preload String: the title of the page.
 146          * @return string The contents of the page.
 147          */
 148         private function getPreloadedText($preload) {
 149                 if ( $preload === '' )
 150                         return '';
 151                 else {
 152                         $preloadTitle = Title::newFromText( $preload );
 153                         if ( isset( $preloadTitle ) && $preloadTitle->userCanRead() ) {
 154                                 $rev=Revision::newFromTitle($preloadTitle);
 155                                 if ( is_object( $rev ) ) {
 156                                         $text = $rev->getText();
 157                                         // TODO FIXME: AAAAAAAAAAA, this shouldn't be implementing
 158                                         // its own mini-parser! -ævar
 159                                         $text = preg_replace( '~</?includeonly>~', '', $text );
 160                                         return $text;
 161                                 } else
 162                                         return '';
 163                         }
 164                 }
 165         }
 166
 167         /**
 168          * This is the function that extracts metadata from the article body on the first view.
 169          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
 170          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
 171          */
 172         function extractMetaDataFromArticle () {
 173                 global $wgUseMetadataEdit , $wgMetadataWhitelist , $wgLang ;
 174                 $this->mMetaData = '' ;
 175                 if ( !$wgUseMetadataEdit ) return ;
 176                 if ( $wgMetadataWhitelist == '' ) return ;
 177                 $s = '' ;
 178                 $t = $this->getContent();
 179
 180                 # MISSING : <nowiki> filtering
 181
 182                 # Categories and language links
 183                 $t = explode ( "\n" , $t ) ;
 184                 $catlow = strtolower ( $wgLang->getNsText ( NS_CATEGORY ) ) ;
 185                 $cat = $ll = array() ;
 186                 foreach ( $t AS $key => $x )
 187                 {
 188                         $y = trim ( strtolower ( $x ) ) ;
 189                         while ( substr ( $y , 0 , 2 ) == '[[' )
 190                         {
 191                                 $y = explode ( ']]' , trim ( $x ) ) ;
 192                                 $first = array_shift ( $y ) ;
 193                                 $first = explode ( ':' , $first ) ;
 194                                 $ns = array_shift ( $first ) ;
 195                                 $ns = trim ( str_replace ( '[' , '' , $ns ) ) ;
 196                                 if ( strlen ( $ns ) == 2 OR strtolower ( $ns ) == $catlow )
 197                                 {
 198                                         $add = '[[' . $ns . ':' . implode ( ':' , $first ) . ']]' ;
 199                                         if ( strtolower ( $ns ) == $catlow ) $cat[] = $add ;
 200                                         else $ll[] = $add ;
 201                                         $x = implode ( ']]' , $y ) ;
 202                                         $t[$key] = $x ;
 203                                         $y = trim ( strtolower ( $x ) ) ;
 204                                 }
 205                         }
 206                 }
 207                 if ( count ( $cat ) ) $s .= implode ( ' ' , $cat ) . "\n" ;
 208                 if ( count ( $ll ) ) $s .= implode ( ' ' , $ll ) . "\n" ;
 209                 $t = implode ( "\n" , $t ) ;
 210
 211                 # Load whitelist
 212                 $sat = array () ; # stand-alone-templates; must be lowercase
 213                 $wl_title = Title::newFromText ( $wgMetadataWhitelist ) ;
 214                 $wl_article = new Article ( $wl_title ) ;
 215                 $wl = explode ( "\n" , $wl_article->getContent() ) ;
 216                 foreach ( $wl AS $x )
 217                 {
 218                         $isentry = false ;
 219                         $x = trim ( $x ) ;
 220                         while ( substr ( $x , 0 , 1 ) == '*' )
 221                         {
 222                                 $isentry = true ;
 223                                 $x = trim ( substr ( $x , 1 ) ) ;
 224                         }
 225                         if ( $isentry )
 226                         {
 227                                 $sat[] = strtolower ( $x ) ;
 228                         }
 229
 230                 }
 231
 232                 # Templates, but only some
 233                 $t = explode ( '{{' , $t ) ;
 234                 $tl = array () ;
 235                 foreach ( $t AS $key => $x )
 236                 {
 237                         $y = explode ( '}}' , $x , 2 ) ;
 238                         if ( count ( $y ) == 2 )
 239                         {
 240                                 $z = $y[0] ;
 241                                 $z = explode ( '|' , $z ) ;
 242                                 $tn = array_shift ( $z ) ;
 243                                 if ( in_array ( strtolower ( $tn ) , $sat ) )
 244                                 {
 245                                         $tl[] = '{{' . $y[0] . '}}' ;
 246                                         $t[$key] = $y[1] ;
 247                                         $y = explode ( '}}' , $y[1] , 2 ) ;
 248                                 }
 249                                 else $t[$key] = '{{' . $x ;
 250                         }
 251                         else if ( $key != 0 ) $t[$key] = '{{' . $x ;
 252                         else $t[$key] = $x ;
 253                 }
 254                 if ( count ( $tl ) ) $s .= implode ( ' ' , $tl ) ;
 255                 $t = implode ( '' , $t ) ;
 256
 257                 $t = str_replace ( "\n\n\n" , "\n" , $t ) ;
 258                 $this->mArticle->mContent = $t ;
 259                 $this->mMetaData = $s ;
 260         }
 261
 262         function submit() {
 263                 $this->edit();
 264         }
 265
 266         /**
 267          * This is the function that gets called for "action=edit". It
 268          * sets up various member variables, then passes execution to
 269          * another function, usually showEditForm()
 270          *
 271          * The edit form is self-submitting, so that when things like
 272          * preview and edit conflicts occur, we get the same form back
 273          * with the extra stuff added.  Only when the final submission
 274          * is made and all is well do we actually save and redirect to
 275          * the newly-edited page.
 276          */
 277         function edit() {
 278                 global $wgOut, $wgUser, $wgRequest, $wgTitle;
 279                 global $wgEmailConfirmToEdit;
 280
 281                 if ( ! wfRunHooks( 'AlternateEdit', array( &$this  ) ) )
 282                         return;
 283
 284                 $fname = 'EditPage::edit';
 285                 wfProfileIn( $fname );
 286                 wfDebug( "$fname: enter\n" );
 287
 288                 // this is not an article
 289                 $wgOut->setArticleFlag(false);
 290
 291                 $this->importFormData( $wgRequest );
 292                 $this->firsttime = false;
 293
 294                 if( $this->live ) {
 295                         $this->livePreview();
 296                         wfProfileOut( $fname );
 297                         return;
 298                 }
 299
 300                 if ( ! $this->mTitle->userCanEdit() ) {
 301                         wfDebug( "$fname: user can't edit\n" );
 302                         $wgOut->readOnlyPage( $this->getContent(), true );
 303                         wfProfileOut( $fname );
 304                         return;
 305                 }
 306                 wfDebug( "$fname: Checking blocks\n" );
 307                 if ( !$this->preview && !$this->diff && $wgUser->isBlockedFrom( $this->mTitle, !$this->save ) ) {
 308                         # When previewing, don't check blocked state - will get caught at save time.
 309                         # Also, check when starting edition is done against slave to improve performance.
 310                         wfDebug( "$fname: user is blocked\n" );
 311                         $this->blockedPage();
 312                         wfProfileOut( $fname );
 313                         return;
 314                 }
 315                 if ( !$wgUser->isAllowed('edit') ) {
 316                         if ( $wgUser->isAnon() ) {
 317                                 wfDebug( "$fname: user must log in\n" );
 318                                 $this->userNotLoggedInPage();
 319                                 wfProfileOut( $fname );
 320                                 return;
 321                         } else {
 322                                 wfDebug( "$fname: read-only page\n" );
 323                                 $wgOut->readOnlyPage( $this->getContent(), true );
 324                                 wfProfileOut( $fname );
 325                                 return;
 326                         }
 327                 }
 328                 if ($wgEmailConfirmToEdit && !$wgUser->isEmailConfirmed()) {
 329                         wfDebug("$fname: user must confirm e-mail address\n");
 330                         $this->userNotConfirmedPage();
 331                         wfProfileOut($fname);
 332                         return;
 333                 }
 334                 if ( !$this->mTitle->userCanCreate() && !$this->mTitle->exists() ) {
 335                         wfDebug( "$fname: no create permission\n" );
 336                         $this->noCreatePermission();
 337                         wfProfileOut( $fname );
 338                         return;
 339                 }
 340                 if ( wfReadOnly() ) {
 341                         wfDebug( "$fname: read-only mode is engaged\n" );
 342                         if( $this->save || $this->preview ) {
 343                                 $this->formtype = 'preview';
 344                         } else if ( $this->diff ) {
 345                                 $this->formtype = 'diff';
 346                         } else {
 347                                 $wgOut->readOnlyPage( $this->getContent() );
 348                                 wfProfileOut( $fname );
 349                                 return;
 350                         }
 351                 } else {
 352                         if ( $this->save ) {
 353                                 $this->formtype = 'save';
 354                         } else if ( $this->preview ) {
 355                                 $this->formtype = 'preview';
 356                         } else if ( $this->diff ) {
 357                                 $this->formtype = 'diff';
 358                         } else { # First time through
 359                                 $this->firsttime = true;
 360                                 if( $this->previewOnOpen() ) {
 361                                         $this->formtype = 'preview';
 362                                 } else {
 363                                         $this->extractMetaDataFromArticle () ;
 364                                         $this->formtype = 'initial';
 365                                 }
 366                         }
 367                 }
 368
 369                 wfProfileIn( "$fname-business-end" );
 370
 371                 $this->isConflict = false;
 372                 // css / js subpages of user pages get a special treatment
 373                 $this->isCssJsSubpage      = $wgTitle->isCssJsSubpage();
 374                 $this->isValidCssJsSubpage = $wgTitle->isValidCssJsSubpage();
 375
 376                 /* Notice that we can't use isDeleted, because it returns true if article is ever deleted
 377                  * no matter it's current state
 378                  */
 379                 $this->deletedSinceEdit = false;
 380                 if ( $this->edittime != '' ) {
 381                         /* Note that we rely on logging table, which hasn't been always there,
 382                          * but that doesn't matter, because this only applies to brand new
 383                          * deletes. This is done on every preview and save request. Move it further down
 384                          * to only perform it on saves
 385                          */
 386                         if ( $this->mTitle->isDeleted() ) {
 387                                 $this->lastDelete = $this->getLastDelete();
 388                                 if ( !is_null($this->lastDelete) ) {
 389                                         $deletetime = $this->lastDelete->log_timestamp;
 390                                         if ( ($deletetime - $this->starttime) > 0 ) {
 391                                                 $this->deletedSinceEdit = true;
 392                                         }
 393                                 }
 394                         }
 395                 }
 396
 397                 if(!$this->mTitle->getArticleID() && ('initial' == $this->formtype || $this->firsttime )) { # new article
 398                         $this->showIntro();
 399                 }
 400                 if( $this->mTitle->isTalkPage() ) {
 401                         $wgOut->addWikiText( wfMsg( 'talkpagetext' ) );
 402                 }
 403
 404                 # Attempt submission here.  This will check for edit conflicts,
 405                 # and redundantly check for locked database, blocked IPs, etc.
 406                 # that edit() already checked just in case someone tries to sneak
 407                 # in the back door with a hand-edited submission URL.
 408
 409                 if ( 'save' == $this->formtype ) {
 410                         if ( !$this->attemptSave() ) {
 411                                 wfProfileOut( "$fname-business-end" );
 412                                 wfProfileOut( $fname );
 413                                 return;
 414                         }
 415                 }
 416
 417                 # First time through: get contents, set time for conflict
 418                 # checking, etc.
 419                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 420                         $this->initialiseForm();
 421                         if( !$this->mTitle->getArticleId() )
 422                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 423                 }
 424
 425                 $this->showEditForm();
 426                 wfProfileOut( "$fname-business-end" );
 427                 wfProfileOut( $fname );
 428         }
 429
 430         /**
 431          * Return true if this page should be previewed when the edit form
 432          * is initially opened.
 433          * @return bool
 434          * @private
 435          */
 436         function previewOnOpen() {
 437                 global $wgUser;
 438                 return $this->section != 'new' &&
 439                         ( ( $wgUser->getOption( 'previewonfirst' ) && $this->mTitle->exists() ) ||
 440                                 ( $this->mTitle->getNamespace() == NS_CATEGORY &&
 441                                         !$this->mTitle->exists() ) );
 442         }
 443
 444         /**
 445          * @todo document
 446          * @param $request
 447          */
 448         function importFormData( &$request ) {
 449                 global $wgLang, $wgUser;
 450                 $fname = 'EditPage::importFormData';
 451                 wfProfileIn( $fname );
 452
 453                 if( $request->wasPosted() ) {
 454                         # These fields need to be checked for encoding.
 455                         # Also remove trailing whitespace, but don't remove _initial_
 456                         # whitespace from the text boxes. This may be significant formatting.
 457                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 458                         $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
 459                         $this->mMetaData = rtrim( $request->getText( 'metadata'   ) );
 460                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 461                         $this->summary   = $wgLang->truncate( $request->getText( 'wpSummary'  ), 250 );
 462
 463                         $this->edittime = $request->getVal( 'wpEdittime' );
 464                         $this->starttime = $request->getVal( 'wpStarttime' );
 465
 466                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 467
 468                         if( is_null( $this->edittime ) ) {
 469                                 # If the form is incomplete, force to preview.
 470                                 wfDebug( "$fname: Form data appears to be incomplete\n" );
 471                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 472                                 $this->preview  = true;
 473                         } else {
 474                                 /* Fallback for live preview */
 475                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 476                                 $this->diff = $request->getCheck( 'wpDiff' );
 477
 478                                 // Remember whether a save was requested, so we can indicate
 479                                 // if we forced preview due to session failure.
 480                                 $this->mTriedSave = !$this->preview;
 481
 482                                 if ( $this->tokenOk( $request ) ) {
 483                                         # Some browsers will not report any submit button
 484                                         # if the user hits enter in the comment box.
 485                                         # The unmarked state will be assumed to be a save,
 486                                         # if the form seems otherwise complete.
 487                                         wfDebug( "$fname: Passed token check.\n" );
 488                                 } else if ( $this->diff ) {
 489                                         # Failed token check, but only requested "Show Changes".
 490                                         wfDebug( "$fname: Failed token check; Show Changes requested.\n" );
 491                                 } else {
 492                                         # Page might be a hack attempt posted from
 493                                         # an external site. Preview instead of saving.
 494                                         wfDebug( "$fname: Failed token check; forcing preview\n" );
 495                                         $this->preview = true;
 496                                 }
 497                         }
 498                         $this->save    = ! ( $this->preview OR $this->diff );
 499                         if( !preg_match( '/^\d{14}$/', $this->edittime )) {
 500                                 $this->edittime = null;
 501                         }
 502
 503                         if( !preg_match( '/^\d{14}$/', $this->starttime )) {
 504                                 $this->starttime = null;
 505                         }
 506
 507                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 508
 509                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 510                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 511
 512                         # Don't force edit summaries when a user is editing their own user or talk page
 513                         if( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) && $this->mTitle->getText() == $wgUser->getName() ) {
 514                                 $this->allowBlankSummary = true;
 515                         } else {
 516                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' );
 517                         }
 518
 519                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 520                 } else {
 521                         # Not a posted form? Start with nothing.
 522                         wfDebug( "$fname: Not a posted form.\n" );
 523                         $this->textbox1  = '';
 524                         $this->textbox2  = '';
 525                         $this->mMetaData = '';
 526                         $this->summary   = '';
 527                         $this->edittime  = '';
 528                         $this->starttime = wfTimestampNow();
 529                         $this->preview   = false;
 530                         $this->save      = false;
 531                         $this->diff      = false;
 532                         $this->minoredit = false;
 533                         $this->watchthis = false;
 534                         $this->recreate  = false;
 535                 }
 536
 537                 $this->oldid = $request->getInt( 'oldid' );
 538
 539                 # Section edit can come from either the form or a link
 540                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 541
 542                 $this->live = $request->getCheck( 'live' );
 543                 $this->editintro = $request->getText( 'editintro' );
 544
 545                 wfProfileOut( $fname );
 546         }
 547
 548         /**
 549          * Make sure the form isn't faking a user's credentials.
 550          *
 551          * @param $request WebRequest
 552          * @return bool
 553          * @private
 554          */
 555         function tokenOk( &$request ) {
 556                 global $wgUser;
 557                 if( $wgUser->isAnon() ) {
 558                         # Anonymous users may not have a session
 559                         # open. Don't tokenize.
 560                         $this->mTokenOk = true;
 561                 } else {
 562                         $this->mTokenOk = $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
 563                 }
 564                 return $this->mTokenOk;
 565         }
 566
 567         /** */
 568         function showIntro() {
 569                 global $wgOut, $wgUser;
 570                 $addstandardintro=true;
 571                 if($this->editintro) {
 572                         $introtitle=Title::newFromText($this->editintro);
 573                         if(isset($introtitle) && $introtitle->userCanRead()) {
 574                                 $rev=Revision::newFromTitle($introtitle);
 575                                 if($rev) {
 576                                         $wgOut->addSecondaryWikiText($rev->getText());
 577                                         $addstandardintro=false;
 578                                 }
 579                         }
 580                 }
 581                 if($addstandardintro) {
 582                         if ( $wgUser->isLoggedIn() )
 583                                 $wgOut->addWikiText( wfMsg( 'newarticletext' ) );
 584                         else
 585                                 $wgOut->addWikiText( wfMsg( 'newarticletextanon' ) );
 586                 }
 587         }
 588
 589         /**
 590          * Attempt submission
 591          * @return bool false if output is done, true if the rest of the form should be displayed
 592          */
 593         function attemptSave() {
 594                 global $wgSpamRegex, $wgFilterCallback, $wgUser, $wgOut;
 595                 global $wgMaxArticleSize;
 596
 597                 $fname = 'EditPage::attemptSave';
 598                 wfProfileIn( $fname );
 599                 wfProfileIn( "$fname-checks" );
 600
 601                 # Reintegrate metadata
 602                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 603                 $this->mMetaData = '' ;
 604
 605                 # Check for spam
 606                 $matches = array();
 607                 if ( $wgSpamRegex && preg_match( $wgSpamRegex, $this->textbox1, $matches ) ) {
 608                         $this->spamPage ( $matches[0] );
 609                         wfProfileOut( "$fname-checks" );
 610                         wfProfileOut( $fname );
 611                         return false;
 612                 }
 613                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section ) ) {
 614                         # Error messages or other handling should be performed by the filter function
 615                         wfProfileOut( $fname );
 616                         wfProfileOut( "$fname-checks" );
 617                         return false;
 618                 }
 619                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError ) ) ) {
 620                         # Error messages etc. could be handled within the hook...
 621                         wfProfileOut( $fname );
 622                         wfProfileOut( "$fname-checks" );
 623                         return false;
 624                 } elseif( $this->hookError != '' ) {
 625                         # ...or the hook could be expecting us to produce an error
 626                         wfProfileOut( "$fname-checks " );
 627                         wfProfileOut( $fname );
 628                         return true;
 629                 }
 630                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 631                         # Check block state against master, thus 'false'.
 632                         $this->blockedPage();
 633                         wfProfileOut( "$fname-checks" );
 634                         wfProfileOut( $fname );
 635                         return false;
 636                 }
 637                 $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 638                 if ( $this->kblength > $wgMaxArticleSize ) {
 639                         // Error will be displayed by showEditForm()
 640                         $this->tooBig = true;
 641                         wfProfileOut( "$fname-checks" );
 642                         wfProfileOut( $fname );
 643                         return true;
 644                 }
 645
 646                 if ( !$wgUser->isAllowed('edit') ) {
 647                         if ( $wgUser->isAnon() ) {
 648                                 $this->userNotLoggedInPage();
 649                                 wfProfileOut( "$fname-checks" );
 650                                 wfProfileOut( $fname );
 651                                 return false;
 652                         }
 653                         else {
 654                                 $wgOut->readOnlyPage();
 655                                 wfProfileOut( "$fname-checks" );
 656                                 wfProfileOut( $fname );
 657                                 return false;
 658                         }
 659                 }
 660
 661                 if ( wfReadOnly() ) {
 662                         $wgOut->readOnlyPage();
 663                         wfProfileOut( "$fname-checks" );
 664                         wfProfileOut( $fname );
 665                         return false;
 666                 }
 667                 if ( $wgUser->pingLimiter() ) {
 668                         $wgOut->rateLimited();
 669                         wfProfileOut( "$fname-checks" );
 670                         wfProfileOut( $fname );
 671                         return false;
 672                 }
 673
 674                 # If the article has been deleted while editing, don't save it without
 675                 # confirmation
 676                 if ( $this->deletedSinceEdit && !$this->recreate ) {
 677                         wfProfileOut( "$fname-checks" );
 678                         wfProfileOut( $fname );
 679                         return true;
 680                 }
 681
 682                 wfProfileOut( "$fname-checks" );
 683
 684                 # If article is new, insert it.
 685                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 686                 if ( 0 == $aid ) {
 687                         // Late check for create permission, just in case *PARANOIA*
 688                         if ( !$this->mTitle->userCanCreate() ) {
 689                                 wfDebug( "$fname: no create permission\n" );
 690                                 $this->noCreatePermission();
 691                                 wfProfileOut( $fname );
 692                                 return;
 693                         }
 694
 695                         # Don't save a new article if it's blank.
 696                         if ( ( '' == $this->textbox1 ) ) {
 697                                         $wgOut->redirect( $this->mTitle->getFullURL() );
 698                                         wfProfileOut( $fname );
 699                                         return false;
 700                         }
 701
 702                         $isComment=($this->section=='new');
 703                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 704                                 $this->minoredit, $this->watchthis, false, $isComment);
 705
 706                         wfProfileOut( $fname );
 707                         return false;
 708                 }
 709
 710                 # Article exists. Check for edit conflict.
 711
 712                 $this->mArticle->clear(); # Force reload of dates, etc.
 713                 $this->mArticle->forUpdate( true ); # Lock the article
 714
 715                 if( $this->mArticle->getTimestamp() != $this->edittime ) {
 716                         $this->isConflict = true;
 717                         if( $this->section == 'new' ) {
 718                                 if( $this->mArticle->getUserText() == $wgUser->getName() &&
 719                                         $this->mArticle->getComment() == $this->summary ) {
 720                                         // Probably a duplicate submission of a new comment.
 721                                         // This can happen when squid resends a request after
 722                                         // a timeout but the first one actually went through.
 723                                         wfDebug( "EditPage::editForm duplicate new section submission; trigger edit conflict!\n" );
 724                                 } else {
 725                                         // New comment; suppress conflict.
 726                                         $this->isConflict = false;
 727                                         wfDebug( "EditPage::editForm conflict suppressed; new section\n" );
 728                                 }
 729                         }
 730                 }
 731                 $userid = $wgUser->getID();
 732
 733                 if ( $this->isConflict) {
 734                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 735                                 $this->mArticle->getTimestamp() . "'\n" );
 736                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime);
 737                 }
 738                 else {
 739                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 740                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary);
 741                 }
 742                 if( is_null( $text ) ) {
 743                         wfDebug( "EditPage::editForm activating conflict; section replace failed.\n" );
 744                         $this->isConflict = true;
 745                         $text = $this->textbox1;
 746                 }
 747
 748                 # Suppress edit conflict with self, except for section edits where merging is required.
 749                 if ( ( $this->section == '' ) && ( 0 != $userid ) && ( $this->mArticle->getUser() == $userid ) ) {
 750                         wfDebug( "Suppressing edit conflict, same user.\n" );
 751                         $this->isConflict = false;
 752                 } else {
 753                         # switch from section editing to normal editing in edit conflict
 754                         if($this->isConflict) {
 755                                 # Attempt merge
 756                                 if( $this->mergeChangesInto( $text ) ){
 757                                         // Successful merge! Maybe we should tell the user the good news?
 758                                         $this->isConflict = false;
 759                                         wfDebug( "Suppressing edit conflict, successful merge.\n" );
 760                                 } else {
 761                                         $this->section = '';
 762                                         $this->textbox1 = $text;
 763                                         wfDebug( "Keeping edit conflict, failed merge.\n" );
 764                                 }
 765                         }
 766                 }
 767
 768                 if ( $this->isConflict ) {
 769                         wfProfileOut( $fname );
 770                         return true;
 771                 }
 772
 773                 $oldtext = $this->mArticle->getContent();
 774
 775                 # Handle the user preference to force summaries here, but not for null edits
 776                 if( $this->section != 'new' && !$this->allowBlankSummary && $wgUser->getOption( 'forceeditsummary')
 777                         &&  0 != strcmp($oldtext, $text) && !Article::getRedirectAutosummary( $text )) {
 778                         if( md5( $this->summary ) == $this->autoSumm ) {
 779                                 $this->missingSummary = true;
 780                                 wfProfileOut( $fname );
 781                                 return( true );
 782                         }
 783                 }
 784
 785                 #And a similar thing for new sections
 786                 if( $this->section == 'new' && !$this->allowBlankSummary && $wgUser->getOption( 'forceeditsummary' ) ) {
 787                         if (trim($this->summary) == '') {
 788                                 $this->missingSummary = true;
 789                                 wfProfileOut( $fname );
 790                                 return( true );
 791                         }
 792                 }
 793
 794                 # All's well
 795                 wfProfileIn( "$fname-sectionanchor" );
 796                 $sectionanchor = '';
 797                 if( $this->section == 'new' ) {
 798                         if ( $this->textbox1 == '' ) {
 799                                 $this->missingComment = true;
 800                                 return true;
 801                         }
 802                         if( $this->summary != '' ) {
 803                                 $sectionanchor = $this->sectionAnchor( $this->summary );
 804                         }
 805                 } elseif( $this->section != '' ) {
 806                         # Try to get a section anchor from the section source, redirect to edited section if header found
 807                         # XXX: might be better to integrate this into Article::replaceSection
 808                         # for duplicate heading checking and maybe parsing
 809                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 810                         # we can't deal with anchors, includes, html etc in the header for now,
 811                         # headline would need to be parsed to improve this
 812                         if($hasmatch and strlen($matches[2]) > 0) {
 813                                 $sectionanchor = $this->sectionAnchor( $matches[2] );
 814                         }
 815                 }
 816                 wfProfileOut( "$fname-sectionanchor" );
 817
 818                 // Save errors may fall down to the edit form, but we've now
 819                 // merged the section into full text. Clear the section field
 820                 // so that later submission of conflict forms won't try to
 821                 // replace that into a duplicated mess.
 822                 $this->textbox1 = $text;
 823                 $this->section = '';
 824
 825                 // Check for length errors again now that the section is merged in
 826                 $this->kblength = (int)(strlen( $text ) / 1024);
 827                 if ( $this->kblength > $wgMaxArticleSize ) {
 828                         $this->tooBig = true;
 829                         wfProfileOut( $fname );
 830                         return true;
 831                 }
 832
 833                 # update the article here
 834                 if( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
 835                         $this->watchthis, '', $sectionanchor ) ) {
 836                         wfProfileOut( $fname );
 837                         return false;
 838                 } else {
 839                         $this->isConflict = true;
 840                 }
 841                 wfProfileOut( $fname );
 842                 return true;
 843         }
 844
 845         /**
 846          * Initialise form fields in the object
 847          * Called on the first invocation, e.g. when a user clicks an edit link
 848          */
 849         function initialiseForm() {
 850                 $this->edittime = $this->mArticle->getTimestamp();
 851                 $this->summary = '';
 852                 $this->textbox1 = $this->getContent();
 853                 if ( !$this->mArticle->exists() && $this->mArticle->mTitle->getNamespace() == NS_MEDIAWIKI )
 854                         $this->textbox1 = wfMsgWeirdKey( $this->mArticle->mTitle->getText() ) ;
 855                 wfProxyCheck();
 856         }
 857
 858         /**
 859          * Send the edit form and related headers to $wgOut
 860          * @param $formCallback Optional callable that takes an OutputPage
 861          *                      parameter; will be called during form output
 862          *                      near the top, for captchas and the like.
 863          */
 864         function showEditForm( $formCallback=null ) {
 865                 global $wgOut, $wgUser, $wgLang, $wgContLang, $wgMaxArticleSize;
 866
 867                 $fname = 'EditPage::showEditForm';
 868                 wfProfileIn( $fname );
 869
 870                 $sk =& $wgUser->getSkin();
 871
 872                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) ) ;
 873
 874                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 875
 876                 # Enabled article-related sidebar, toplinks, etc.
 877                 $wgOut->setArticleRelated( true );
 878
 879                 if ( $this->isConflict ) {
 880                         $s = wfMsg( 'editconflict', $this->mTitle->getPrefixedText() );
 881                         $wgOut->setPageTitle( $s );
 882                         $wgOut->addWikiText( wfMsg( 'explainconflict' ) );
 883
 884                         $this->textbox2 = $this->textbox1;
 885                         $this->textbox1 = $this->getContent();
 886                         $this->edittime = $this->mArticle->getTimestamp();
 887                 } else {
 888
 889                         if( $this->section != '' ) {
 890                                 if( $this->section == 'new' ) {
 891                                         $s = wfMsg('editingcomment', $this->mTitle->getPrefixedText() );
 892                                 } else {
 893                                         $s = wfMsg('editingsection', $this->mTitle->getPrefixedText() );
 894                                         $matches = array();
 895                                         if( !$this->summary && !$this->preview && !$this->diff ) {
 896                                                 preg_match( "/^(=+)(.+)\\1/mi",
 897                                                         $this->textbox1,
 898                                                         $matches );
 899                                                 if( !empty( $matches[2] ) ) {
 900                                                         $this->summary = "/* ". trim($matches[2])." */ ";
 901                                                 }
 902                                         }
 903                                 }
 904                         } else {
 905                                 $s = wfMsg( 'editing', $this->mTitle->getPrefixedText() );
 906                         }
 907                         $wgOut->setPageTitle( $s );
 908
 909                         if ( $this->missingComment ) {
 910                                 $wgOut->addWikiText( wfMsg( 'missingcommenttext' ) );
 911                         }
 912
 913                         if( $this->missingSummary && $this->section != 'new' ) {
 914                                 $wgOut->addWikiText( wfMsg( 'missingsummary' ) );
 915                         }
 916
 917                         if( $this->missingSummary && $this->section == 'new' ) {
 918                                 $wgOut->addWikiText( wfMsg( 'missingcommentheader' ) );
 919                         }
 920
 921                         if( !$this->hookError == '' ) {
 922                                 $wgOut->addWikiText( $this->hookError );
 923                         }
 924
 925                         if ( !$this->checkUnicodeCompliantBrowser() ) {
 926                                 $wgOut->addWikiText( wfMsg( 'nonunicodebrowser') );
 927                         }
 928                         if ( isset( $this->mArticle )
 929                              && isset( $this->mArticle->mRevision )
 930                              && !$this->mArticle->mRevision->isCurrent() ) {
 931                                 $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
 932                                 $wgOut->addWikiText( wfMsg( 'editingold' ) );
 933                         }
 934                 }
 935
 936                 if( wfReadOnly() ) {
 937                         $wgOut->addWikiText( wfMsg( 'readonlywarning' ) );
 938                 } elseif( $wgUser->isAnon() && $this->formtype != 'preview' ) {
 939                         $wgOut->addWikiText( wfMsg( 'anoneditwarning' ) );
 940                 } else {
 941                         if( $this->isCssJsSubpage && $this->formtype != 'preview' ) {
 942                                 # Check the skin exists
 943                                 if( $this->isValidCssJsSubpage ) {
 944                                         $wgOut->addWikiText( wfMsg( 'usercssjsyoucanpreview' ) );
 945                                 } else {
 946                                         $wgOut->addWikiText( wfMsg( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
 947                                 }
 948                         }
 949                 }
 950
 951                 if( $this->mTitle->isProtected( 'edit' ) ) {
 952                         # Is the protection due to the namespace, e.g. interface text?
 953                         if( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 954                                 # Yes; remind the user
 955                                 $notice = wfMsg( 'editinginterface' );
 956                         } elseif( $this->mTitle->isSemiProtected() ) {
 957                                 # No; semi protected
 958                                 $notice = wfMsg( 'semiprotectedpagewarning' );
 959                                 if( wfEmptyMsg( 'semiprotectedpagewarning', $notice ) || $notice == '-' ) {
 960                                         $notice = '';
 961                                 }
 962                         } else {
 963                                 # No; regular protection
 964                                 $notice = wfMsg( 'protectedpagewarning' );
 965                         }
 966                         $wgOut->addWikiText( $notice );
 967                 }
 968
 969                 if ( $this->kblength === false ) {
 970                         $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 971                 }
 972                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
 973                         $wgOut->addWikiText( wfMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgMaxArticleSize ) );
 974                 } elseif( $this->kblength > 29 ) {
 975                         $wgOut->addWikiText( wfMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) ) );
 976                 }
 977
 978                 #need to parse the preview early so that we know which templates are used,
 979                 #otherwise users with "show preview after edit box" will get a blank list
 980                 $previewOutput = $this->getPreviewText();
 981
 982                 $rows = $wgUser->getIntOption( 'rows' );
 983                 $cols = $wgUser->getIntOption( 'cols' );
 984
 985                 $ew = $wgUser->getOption( 'editwidth' );
 986                 if ( $ew ) $ew = " style=\"width:100%\"";
 987                 else $ew = '';
 988
 989                 $q = 'action=submit';
 990                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
 991                 $action = $this->mTitle->escapeLocalURL( $q );
 992
 993                 $summary = wfMsg('summary');
 994                 $subject = wfMsg('subject');
 995                 $minor   = wfMsgExt('minoredit', array('parseinline'));
 996                 $watchthis = wfMsgExt('watchthis', array('parseinline'));
 997
 998                 $cancel = $sk->makeKnownLink( $this->mTitle->getPrefixedText(),
 999                                 wfMsgExt('cancel', array('parseinline')) );
1000                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ));
1001                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
1002                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
1003                         htmlspecialchars( wfMsg( 'newwindow' ) );
1004
1005                 global $wgRightsText;
1006                 $copywarn = "<div id=\"editpage-copywarn\">\n" .
1007                         wfMsg( $wgRightsText ? 'copyrightwarning' : 'copyrightwarning2',
1008                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
1009                                 $wgRightsText ) . "\n</div>";
1010
1011                 if( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
1012                         # prepare toolbar for edit buttons
1013                         $toolbar = $this->getEditToolbar();
1014                 } else {
1015                         $toolbar = '';
1016                 }
1017
1018                 // activate checkboxes if user wants them to be always active
1019                 if( !$this->preview && !$this->diff ) {
1020                         # Sort out the "watch" checkbox
1021                         if( $wgUser->getOption( 'watchdefault' ) ) {
1022                                 # Watch all edits
1023                                 $this->watchthis = true;
1024                         } elseif( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1025                                 # Watch creations
1026                                 $this->watchthis = true;
1027                         } elseif( $this->mTitle->userIsWatching() ) {
1028                                 # Already watched
1029                                 $this->watchthis = true;
1030                         }
1031
1032                         if( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
1033                 }
1034
1035                 $minoredithtml = '';
1036
1037                 if ( $wgUser->isAllowed('minoredit') ) {
1038                         $minoredithtml =
1039                                 "<input tabindex='3' type='checkbox' value='1' name='wpMinoredit'".($this->minoredit?" checked='checked'":"").
1040                                 " accesskey='".wfMsg('accesskey-minoredit')."' id='wpMinoredit' />\n".
1041                                 "<label for='wpMinoredit' title='".wfMsg('tooltip-minoredit')."'>{$minor}</label>\n";
1042                 }
1043
1044                 $watchhtml = '';
1045
1046                 if ( $wgUser->isLoggedIn() ) {
1047                         $watchhtml = "<input tabindex='4' type='checkbox' name='wpWatchthis'".
1048                                 ($this->watchthis?" checked='checked'":"").
1049                                 " accesskey=\"".htmlspecialchars(wfMsg('accesskey-watch'))."\" id='wpWatchthis'  />\n".
1050                                 "<label for='wpWatchthis' title=\"" .
1051                                         htmlspecialchars(wfMsg('tooltip-watch'))."\">{$watchthis}</label>\n";
1052                 }
1053
1054                 $checkboxhtml = $minoredithtml . $watchhtml;
1055
1056                 $wgOut->addHTML( $this->editFormPageTop );
1057
1058                 if ( $wgUser->getOption( 'previewontop' ) ) {
1059
1060                         if ( 'preview' == $this->formtype ) {
1061                                 $this->showPreview( $previewOutput );
1062                         } else {
1063                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
1064                         }
1065
1066                         if ( 'diff' == $this->formtype ) {
1067                                 $wgOut->addHTML( $this->getDiff() );
1068                         }
1069                 }
1070
1071
1072                 $wgOut->addHTML( $this->editFormTextTop );
1073
1074                 # if this is a comment, show a subject line at the top, which is also the edit summary.
1075                 # Otherwise, show a summary field at the bottom
1076                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
1077                 if( $this->section == 'new' ) {
1078                         $commentsubject="<span id='wpSummaryLabel'><label for='wpSummary'>{$subject}:</label></span>\n<div class='editOptions'>\n<input tabindex='1' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
1079                         $editsummary = '';
1080                         $subjectpreview = $summarytext && $this->preview ? "<div class=\"mw-summary-preview\">".wfMsg('subject-preview').':'.$sk->commentBlock( $this->summary, $this->mTitle )."</div>\n" : '';
1081                         $summarypreview = '';
1082                 } else {
1083                         $commentsubject = '';
1084                         $editsummary="<span id='wpSummaryLabel'><label for='wpSummary'>{$summary}:</label></span>\n<div class='editOptions'>\n<input tabindex='2' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
1085                         $summarypreview = $summarytext && $this->preview ? "<div class=\"mw-summary-preview\">".wfMsg('summary-preview').':'.$sk->commentBlock( $this->summary, $this->mTitle )."</div>\n" : '';
1086                         $subjectpreview = '';
1087                 }
1088
1089                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
1090                 if( !$this->preview && !$this->diff ) {
1091                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
1092                 }
1093                 $templates = ($this->preview || $this->section) ? $this->mPreviewTemplates : $this->mArticle->getUsedTemplates();
1094                 $formattedtemplates = $sk->formatTemplates( $templates, $this->preview, $this->section != '');
1095
1096                 global $wgUseMetadataEdit ;
1097                 if ( $wgUseMetadataEdit ) {
1098                         $metadata = $this->mMetaData ;
1099                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
1100                         $top = wfMsgWikiHtml( 'metadata_help' );
1101                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
1102                 }
1103                 else $metadata = "" ;
1104
1105                 $hidden = '';
1106                 $recreate = '';
1107                 if ($this->deletedSinceEdit) {
1108                         if ( 'save' != $this->formtype ) {
1109                                 $wgOut->addWikiText( wfMsg('deletedwhileediting'));
1110                         } else {
1111                                 // Hide the toolbar and edit area, use can click preview to get it back
1112                                 // Add an confirmation checkbox and explanation.
1113                                 $toolbar = '';
1114                                 $hidden = 'type="hidden" style="display:none;"';
1115                                 $recreate = $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ));
1116                                 $recreate .=
1117                                         "<br /><input tabindex='1' type='checkbox' value='1' name='wpRecreate' id='wpRecreate' />".
1118                                         "<label for='wpRecreate' title='".wfMsg('tooltip-recreate')."'>". wfMsg('recreate')."</label>";
1119                         }
1120                 }
1121
1122                 $temp = array(
1123                         'id'        => 'wpSave',
1124                         'name'      => 'wpSave',
1125                         'type'      => 'submit',
1126                         'tabindex'  => '5',
1127                         'value'     => wfMsg('savearticle'),
1128                         'accesskey' => wfMsg('accesskey-save'),
1129                         'title'     => wfMsg('tooltip-save'),
1130                 );
1131                 $buttons['save'] = wfElement('input', $temp, '');
1132                 $temp = array(
1133                         'id'        => 'wpDiff',
1134                         'name'      => 'wpDiff',
1135                         'type'      => 'submit',
1136                         'tabindex'  => '7',
1137                         'value'     => wfMsg('showdiff'),
1138                         'accesskey' => wfMsg('accesskey-diff'),
1139                         'title'     => wfMsg('tooltip-diff'),
1140                 );
1141                 $buttons['diff'] = wfElement('input', $temp, '');
1142
1143                 global $wgLivePreview;
1144                 if ( $wgLivePreview && $wgUser->getOption( 'uselivepreview' ) ) {
1145                         $temp = array(
1146                                 'id'        => 'wpPreview',
1147                                 'name'      => 'wpPreview',
1148                                 'type'      => 'submit',
1149                                 'tabindex'  => '6',
1150                                 'value'     => wfMsg('showpreview'),
1151                                 'accesskey' => '',
1152                                 'title'     => wfMsg('tooltip-preview'),
1153                                 'style'     => 'display: none;',
1154                         );
1155                         $buttons['preview'] = wfElement('input', $temp, '');
1156                         $temp = array(
1157                                 'id'        => 'wpLivePreview',
1158                                 'name'      => 'wpLivePreview',
1159                                 'type'      => 'submit',
1160                                 'tabindex'  => '6',
1161                                 'value'     => wfMsg('showlivepreview'),
1162                                 'accesskey' => wfMsg('accesskey-preview'),
1163                                 'title'     => '',
1164                                 'onclick'   => $this->doLivePreviewScript(),
1165                         );
1166                         $buttons['live'] = wfElement('input', $temp, '');
1167                 } else {
1168                         $temp = array(
1169                                 'id'        => 'wpPreview',
1170                                 'name'      => 'wpPreview',
1171                                 'type'      => 'submit',
1172                                 'tabindex'  => '6',
1173                                 'value'     => wfMsg('showpreview'),
1174                                 'accesskey' => wfMsg('accesskey-preview'),
1175                                 'title'     => wfMsg('tooltip-preview'),
1176                         );
1177                         $buttons['preview'] = wfElement('input', $temp, '');
1178                         $buttons['live'] = '';
1179                 }
1180
1181                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
1182                         ? ""
1183                         : "<input type='hidden' name=\"safemode\" value='1' />\n";
1184
1185                 $wgOut->addHTML( <<<END
1186 {$toolbar}
1187 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1188 END
1189 );
1190
1191                 if( is_callable( $formCallback ) ) {
1192                         call_user_func_array( $formCallback, array( &$wgOut ) );
1193                 }
1194
1195                 // Put these up at the top to ensure they aren't lost on early form submission
1196                 $wgOut->addHTML( "
1197 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
1198 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
1199 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
1200 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
1201
1202                 $wgOut->addHTML( <<<END
1203 $recreate
1204 {$commentsubject}
1205 {$subjectpreview}
1206 <textarea tabindex='1' accesskey="," name="wpTextbox1" id="wpTextbox1" rows='{$rows}'
1207 cols='{$cols}'{$ew} $hidden>
1208 END
1209 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox1 ) ) .
1210 "
1211 </textarea>
1212                 " );
1213
1214                 $wgOut->addWikiText( $copywarn );
1215                 $wgOut->addHTML( $this->editFormTextAfterWarn );
1216                 $wgOut->addHTML( "
1217 {$metadata}
1218 {$editsummary}
1219 {$summarypreview}
1220 {$checkboxhtml}
1221 {$safemodehtml}
1222 ");
1223
1224                 $wgOut->addHTML(
1225 "<div class='editButtons'>
1226         {$buttons['save']}
1227         {$buttons['preview']}
1228         {$buttons['live']}
1229         {$buttons['diff']}
1230         <span class='editHelp'>{$cancel} | {$edithelp}</span>
1231 </div><!-- editButtons -->
1232 </div><!-- editOptions -->");
1233
1234                 $wgOut->addWikiText( wfMsgForContent( 'edittools' ) );
1235                 $wgOut->addHTML( $this->editFormTextAfterTools );
1236
1237                 $wgOut->addHTML( "
1238 <div class='templatesUsed'>
1239 {$formattedtemplates}
1240 </div>
1241 " );
1242
1243                 if ( $wgUser->isLoggedIn() ) {
1244                         /**
1245                          * To make it harder for someone to slip a user a page
1246                          * which submits an edit form to the wiki without their
1247                          * knowledge, a random token is associated with the login
1248                          * session. If it's not passed back with the submission,
1249                          * we won't save the page, or render user JavaScript and
1250                          * CSS previews.
1251                          */
1252                         $token = htmlspecialchars( $wgUser->editToken() );
1253                         $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
1254                 }
1255
1256                 # If a blank edit summary was previously provided, and the appropriate
1257                 # user preference is active, pass a hidden tag here. This will stop the
1258                 # user being bounced back more than once in the event that a summary
1259                 # is not required.
1260                 if( $this->missingSummary ) {
1261                         $wgOut->addHTML( "<input type=\"hidden\" name=\"wpIgnoreBlankSummary\" value=\"1\" />\n" );
1262                 }
1263
1264                 # For a bit more sophisticated detection of blank summaries, hash the
1265                 # automatic one and pass that in a hidden field.
1266                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1267                 $wgOut->addHtml( wfHidden( 'wpAutoSummary', $autosumm ) );
1268
1269                 if ( $this->isConflict ) {
1270                         $wgOut->addWikiText( '==' . wfMsg( "yourdiff" ) . '==' );
1271
1272                         $de = new DifferenceEngine( $this->mTitle );
1273                         $de->setText( $this->textbox2, $this->textbox1 );
1274                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1275
1276                         $wgOut->addWikiText( '==' . wfMsg( "yourtext" ) . '==' );
1277                         $wgOut->addHTML( "<textarea tabindex=6 id='wpTextbox2' name=\"wpTextbox2\" rows='{$rows}' cols='{$cols}' wrap='virtual'>"
1278                                 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox2 ) ) . "\n</textarea>" );
1279                 }
1280                 $wgOut->addHTML( $this->editFormTextBottom );
1281                 $wgOut->addHTML( "</form>\n" );
1282                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1283
1284                         if ( $this->formtype == 'preview') {
1285                                 $this->showPreview( $previewOutput );
1286                         } else {
1287                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
1288                         }
1289
1290                         if ( $this->formtype == 'diff') {
1291                                 $wgOut->addHTML( $this->getDiff() );
1292                         }
1293
1294                 }
1295
1296                 wfProfileOut( $fname );
1297         }
1298
1299         /**
1300          * Append preview output to $wgOut.
1301          * Includes category rendering if this is a category page.
1302          *
1303          * @param string $text The HTML to be output for the preview.
1304          */
1305         private function showPreview( $text ) {
1306                 global $wgOut;
1307
1308                 $wgOut->addHTML( '<div id="wikiPreview">' );
1309                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1310                         $this->mArticle->openShowCategory();
1311                 }
1312                 $wgOut->addHTML( $text );
1313                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1314                         $this->mArticle->closeShowCategory();
1315                 }
1316                 $wgOut->addHTML( '</div>' );
1317         }
1318
1319         /**
1320          * Live Preview lets us fetch rendered preview page content and
1321          * add it to the page without refreshing the whole page.
1322          * If not supported by the browser it will fall through to the normal form
1323          * submission method.
1324          *
1325          * This function outputs a script tag to support live preview, and
1326          * returns an onclick handler which should be added to the attributes
1327          * of the preview button
1328          */
1329         function doLivePreviewScript() {
1330                 global $wgStylePath, $wgJsMimeType, $wgStyleVersion, $wgOut, $wgTitle;
1331                 $wgOut->addHTML( '<script type="'.$wgJsMimeType.'" src="' .
1332                         htmlspecialchars( "$wgStylePath/common/preview.js?$wgStyleVersion" ) .
1333                         '"></script>' . "\n" );
1334                 $liveAction = $wgTitle->getLocalUrl( 'action=submit&wpPreview=true&live=true' );
1335                 return "return !livePreview(" .
1336                         "getElementById('wikiPreview')," .
1337                         "editform.wpTextbox1.value," .
1338                         '"' . $liveAction . '"' . ")";
1339         }
1340
1341         function getLastDelete() {
1342                 $dbr =& wfGetDB( DB_SLAVE );
1343                 $fname = 'EditPage::getLastDelete';
1344                 $res = $dbr->select(
1345                         array( 'logging', 'user' ),
1346                         array( 'log_type',
1347                                'log_action',
1348                                'log_timestamp',
1349                                'log_user',
1350                                'log_namespace',
1351                                'log_title',
1352                                'log_comment',
1353                                'log_params',
1354                                'user_name', ),
1355                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1356                                'log_title' => $this->mTitle->getDBkey(),
1357                                'log_type' => 'delete',
1358                                'log_action' => 'delete',
1359                                'user_id=log_user' ),
1360                         $fname,
1361                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
1362
1363                 if($dbr->numRows($res) == 1) {
1364                         while ( $x = $dbr->fetchObject ( $res ) )
1365                                 $data = $x;
1366                         $dbr->freeResult ( $res ) ;
1367                 } else {
1368                         $data = null;
1369                 }
1370                 return $data;
1371         }
1372
1373         /**
1374          * @todo document
1375          */
1376         function getPreviewText() {
1377                 global $wgOut, $wgUser, $wgTitle, $wgParser;
1378
1379                 $fname = 'EditPage::getPreviewText';
1380                 wfProfileIn( $fname );
1381
1382                 if ( $this->mTriedSave && !$this->mTokenOk ) {
1383                         $msg = 'session_fail_preview';
1384                 } else {
1385                         $msg = 'previewnote';
1386                 }
1387                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
1388                         "<div class='previewnote'>" . $wgOut->parse( wfMsg( $msg ) ) . "</div>\n";
1389                 if ( $this->isConflict ) {
1390                         $previewhead.='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1391                 }
1392
1393                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1394                 $parserOptions->setEditSection( false );
1395
1396                 global $wgRawHtml;
1397                 if( $wgRawHtml && !$this->mTokenOk ) {
1398                         // Could be an offsite preview attempt. This is very unsafe if
1399                         // HTML is enabled, as it could be an attack.
1400                         return $wgOut->parse( "<div class='previewnote'>" .
1401                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1402                 }
1403
1404                 # don't parse user css/js, show message about preview
1405                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1406
1407                 if ( $this->isCssJsSubpage ) {
1408                         if(preg_match("/\\.css$/", $wgTitle->getText() ) ) {
1409                                 $previewtext = wfMsg('usercsspreview');
1410                         } else if(preg_match("/\\.js$/", $wgTitle->getText() ) ) {
1411                                 $previewtext = wfMsg('userjspreview');
1412                         }
1413                         $parserOptions->setTidy(true);
1414                         $parserOutput = $wgParser->parse( $previewtext , $wgTitle, $parserOptions );
1415                         $wgOut->addHTML( $parserOutput->mText );
1416                         wfProfileOut( $fname );
1417                         return $previewhead;
1418                 } else {
1419                         $toparse = $this->textbox1;
1420
1421                         # If we're adding a comment, we need to show the
1422                         # summary as the headline
1423                         if($this->section=="new" && $this->summary!="") {
1424                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1425                         }
1426
1427                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData ;
1428                         $parserOptions->setTidy(true);
1429                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ) ."\n\n",
1430                                         $wgTitle, $parserOptions );
1431
1432                         $previewHTML = $parserOutput->getText();
1433                         $wgOut->addParserOutputNoText( $parserOutput );
1434
1435                         foreach ( $parserOutput->getTemplates() as $ns => $template)
1436                                 foreach ( array_keys( $template ) as $dbk)
1437                                         $this->mPreviewTemplates[] = Title::makeTitle($ns, $dbk);
1438
1439                         wfProfileOut( $fname );
1440                         return $previewhead . $previewHTML;
1441                 }
1442         }
1443
1444         /**
1445          * Call the stock "user is blocked" page
1446          */
1447         function blockedPage() {
1448                 global $wgOut, $wgUser;
1449                 $wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
1450
1451                 # If the user made changes, preserve them when showing the markup
1452                 # (This happens when a user is blocked during edit, for instance)
1453                 $first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
1454                 if( $first ) {
1455                         $source = $this->mTitle->exists() ? $this->getContent() : false;
1456                 } else {
1457                         $source = $this->textbox1;
1458                 }
1459
1460                 # Spit out the source or the user's modified version
1461                 if( $source !== false ) {
1462                         $rows = $wgUser->getOption( 'rows' );
1463                         $cols = $wgUser->getOption( 'cols' );
1464                         $attribs = array( 'id' => 'wpTextbox1', 'name' => 'wpTextbox1', 'cols' => $cols, 'rows' => $rows, 'readonly' => 'readonly' );
1465                         $wgOut->addHtml( '<hr />' );
1466                         $wgOut->addWikiText( wfMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() ) );
1467                         $wgOut->addHtml( wfOpenElement( 'textarea', $attribs ) . htmlspecialchars( $source ) . wfCloseElement( 'textarea' ) );
1468                 }
1469         }
1470
1471         /**
1472          * Produce the stock "please login to edit pages" page
1473          */
1474         function userNotLoggedInPage() {
1475                 global $wgUser, $wgOut;
1476                 $skin = $wgUser->getSkin();
1477
1478                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1479                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $this->mTitle->getPrefixedUrl() );
1480
1481                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1482                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1483                 $wgOut->setArticleRelated( false );
1484
1485                 $wgOut->addHtml( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
1486                 $wgOut->returnToMain( false, $this->mTitle->getPrefixedUrl() );
1487         }
1488
1489         /**
1490          * Creates a basic error page which informs the user that
1491          * they have to validate their email address before being
1492          * allowed to edit.
1493          */
1494         function userNotConfirmedPage() {
1495                 global $wgOut;
1496
1497                 $wgOut->setPageTitle( wfMsg( 'confirmedittitle' ) );
1498                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1499                 $wgOut->setArticleRelated( false );
1500
1501                 $wgOut->addWikiText( wfMsg( 'confirmedittext' ) );
1502                 $wgOut->returnToMain( false );
1503         }
1504
1505         /**
1506          * Produce the stock "your edit contains spam" page
1507          *
1508          * @param $match Text which triggered one or more filters
1509          */
1510         function spamPage( $match = false ) {
1511                 global $wgOut;
1512
1513                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1514                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1515                 $wgOut->setArticleRelated( false );
1516
1517                 $wgOut->addWikiText( wfMsg( 'spamprotectiontext' ) );
1518                 if ( $match )
1519                         $wgOut->addWikiText( wfMsg( 'spamprotectionmatch', "<nowiki>{$match}</nowiki>" ) );
1520
1521                 $wgOut->returnToMain( false );
1522         }
1523
1524         /**
1525          * @private
1526          * @todo document
1527          */
1528         function mergeChangesInto( &$editText ){
1529                 $fname = 'EditPage::mergeChangesInto';
1530                 wfProfileIn( $fname );
1531
1532                 $db =& wfGetDB( DB_MASTER );
1533
1534                 // This is the revision the editor started from
1535                 $baseRevision = Revision::loadFromTimestamp(
1536                         $db, $this->mArticle->mTitle, $this->edittime );
1537                 if( is_null( $baseRevision ) ) {
1538                         wfProfileOut( $fname );
1539                         return false;
1540                 }
1541                 $baseText = $baseRevision->getText();
1542
1543                 // The current state, we want to merge updates into it
1544                 $currentRevision =  Revision::loadFromTitle(
1545                         $db, $this->mArticle->mTitle );
1546                 if( is_null( $currentRevision ) ) {
1547                         wfProfileOut( $fname );
1548                         return false;
1549                 }
1550                 $currentText = $currentRevision->getText();
1551
1552                 $result = '';
1553                 if( wfMerge( $baseText, $editText, $currentText, $result ) ){
1554                         $editText = $result;
1555                         wfProfileOut( $fname );
1556                         return true;
1557                 } else {
1558                         wfProfileOut( $fname );
1559                         return false;
1560                 }
1561         }
1562
1563         /**
1564          * Check if the browser is on a blacklist of user-agents known to
1565          * mangle UTF-8 data on form submission. Returns true if Unicode
1566          * should make it through, false if it's known to be a problem.
1567          * @return bool
1568          * @private
1569          */
1570         function checkUnicodeCompliantBrowser() {
1571                 global $wgBrowserBlackList;
1572                 if( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
1573                         // No User-Agent header sent? Trust it by default...
1574                         return true;
1575                 }
1576                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1577                 foreach ( $wgBrowserBlackList as $browser ) {
1578                         if ( preg_match($browser, $currentbrowser) ) {
1579                                 return false;
1580                         }
1581                 }
1582                 return true;
1583         }
1584
1585         /**
1586          * Format an anchor fragment as it would appear for a given section name
1587          * @param string $text
1588          * @return string
1589          * @private
1590          */
1591         function sectionAnchor( $text ) {
1592                 $headline = Sanitizer::decodeCharReferences( $text );
1593                 # strip out HTML
1594                 $headline = preg_replace( '/<.*?' . '>/', '', $headline );
1595                 $headline = trim( $headline );
1596                 $sectionanchor = '#' . urlencode( str_replace( ' ', '_', $headline ) );
1597                 $replacearray = array(
1598                         '%3A' => ':',
1599                         '%' => '.'
1600                 );
1601                 return str_replace(
1602                         array_keys( $replacearray ),
1603                         array_values( $replacearray ),
1604                         $sectionanchor );
1605         }
1606
1607         /**
1608          * Shows a bulletin board style toolbar for common editing functions.
1609          * It can be disabled in the user preferences.
1610          * The necessary JavaScript code can be found in style/wikibits.js.
1611          */
1612         function getEditToolbar() {
1613                 global $wgStylePath, $wgContLang, $wgJsMimeType;
1614
1615                 /**
1616                  * toolarray an array of arrays which each include the filename of
1617                  * the button image (without path), the opening tag, the closing tag,
1618                  * and optionally a sample text that is inserted between the two when no
1619                  * selection is highlighted.
1620                  * The tip text is shown when the user moves the mouse over the button.
1621                  *
1622                  * Already here are accesskeys (key), which are not used yet until someone
1623                  * can figure out a way to make them work in IE. However, we should make
1624                  * sure these keys are not defined on the edit page.
1625                  */
1626                 $toolarray=array(
1627                         array(  'image'=>'button_bold.png',
1628                                         'open'  =>      "\'\'\'",
1629                                         'close' =>      "\'\'\'",
1630                                         'sample'=>      wfMsg('bold_sample'),
1631                                         'tip'   =>      wfMsg('bold_tip'),
1632                                         'key'   =>      'B'
1633                                 ),
1634                         array(  'image'=>'button_italic.png',
1635                                         'open'  =>      "\'\'",
1636                                         'close' =>      "\'\'",
1637                                         'sample'=>      wfMsg('italic_sample'),
1638                                         'tip'   =>      wfMsg('italic_tip'),
1639                                         'key'   =>      'I'
1640                                 ),
1641                         array(  'image'=>'button_link.png',
1642                                         'open'  =>      '[[',
1643                                         'close' =>      ']]',
1644                                         'sample'=>      wfMsg('link_sample'),
1645                                         'tip'   =>      wfMsg('link_tip'),
1646                                         'key'   =>      'L'
1647                                 ),
1648                         array(  'image'=>'button_extlink.png',
1649                                         'open'  =>      '[',
1650                                         'close' =>      ']',
1651                                         'sample'=>      wfMsg('extlink_sample'),
1652                                         'tip'   =>      wfMsg('extlink_tip'),
1653                                         'key'   =>      'X'
1654                                 ),
1655                         array(  'image'=>'button_headline.png',
1656                                         'open'  =>      "\\n== ",
1657                                         'close' =>      " ==\\n",
1658                                         'sample'=>      wfMsg('headline_sample'),
1659                                         'tip'   =>      wfMsg('headline_tip'),
1660                                         'key'   =>      'H'
1661                                 ),
1662                         array(  'image'=>'button_image.png',
1663                                         'open'  =>      '[['.$wgContLang->getNsText(NS_IMAGE).":",
1664                                         'close' =>      ']]',
1665                                         'sample'=>      wfMsg('image_sample'),
1666                                         'tip'   =>      wfMsg('image_tip'),
1667                                         'key'   =>      'D'
1668                                 ),
1669                         array(  'image' =>'button_media.png',
1670                                         'open'  =>      '[['.$wgContLang->getNsText(NS_MEDIA).':',
1671                                         'close' =>      ']]',
1672                                         'sample'=>      wfMsg('media_sample'),
1673                                         'tip'   =>      wfMsg('media_tip'),
1674                                         'key'   =>      'M'
1675                                 ),
1676                         array(  'image' =>'button_math.png',
1677                                         'open'  =>      "<math>",
1678                                         'close' =>      "<\\/math>",
1679                                         'sample'=>      wfMsg('math_sample'),
1680                                         'tip'   =>      wfMsg('math_tip'),
1681                                         'key'   =>      'C'
1682                                 ),
1683                         array(  'image' =>'button_nowiki.png',
1684                                         'open'  =>      "<nowiki>",
1685                                         'close' =>      "<\\/nowiki>",
1686                                         'sample'=>      wfMsg('nowiki_sample'),
1687                                         'tip'   =>      wfMsg('nowiki_tip'),
1688                                         'key'   =>      'N'
1689                                 ),
1690                         array(  'image' =>'button_sig.png',
1691                                         'open'  =>      '--~~~~',
1692                                         'close' =>      '',
1693                                         'sample'=>      '',
1694                                         'tip'   =>      wfMsg('sig_tip'),
1695                                         'key'   =>      'Y'
1696                                 ),
1697                         array(  'image' =>'button_hr.png',
1698                                         'open'  =>      "\\n----\\n",
1699                                         'close' =>      '',
1700                                         'sample'=>      '',
1701                                         'tip'   =>      wfMsg('hr_tip'),
1702                                         'key'   =>      'R'
1703                                 )
1704                 );
1705                 $toolbar = "<div id='toolbar'>\n";
1706                 $toolbar.="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
1707
1708                 foreach($toolarray as $tool) {
1709
1710                         $image=$wgStylePath.'/common/images/'.$tool['image'];
1711                         $open=$tool['open'];
1712                         $close=$tool['close'];
1713                         $sample = wfEscapeJsString( $tool['sample'] );
1714
1715                         // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
1716                         // Older browsers show a "speedtip" type message only for ALT.
1717                         // Ideally these should be different, realistically they
1718                         // probably don't need to be.
1719                         $tip = wfEscapeJsString( $tool['tip'] );
1720
1721                         #$key = $tool["key"];
1722
1723                         $toolbar.="addButton('$image','$tip','$open','$close','$sample');\n";
1724                 }
1725
1726                 $toolbar.="/*]]>*/\n</script>";
1727                 $toolbar.="\n</div>";
1728                 return $toolbar;
1729         }
1730
1731         /**
1732          * Output preview text only. This can be sucked into the edit page
1733          * via JavaScript, and saves the server time rendering the skin as
1734          * well as theoretically being more robust on the client (doesn't
1735          * disturb the edit box's undo history, won't eat your text on
1736          * failure, etc).
1737          *
1738          * @todo This doesn't include category or interlanguage links.
1739          *       Would need to enhance it a bit, maybe wrap them in XML
1740          *       or something... that might also require more skin
1741          *       initialization, so check whether that's a problem.
1742          */
1743         function livePreview() {
1744                 global $wgOut;
1745                 $wgOut->disable();
1746                 header( 'Content-type: text/xml' );
1747                 header( 'Cache-control: no-cache' );
1748                 # FIXME
1749                 echo $this->getPreviewText( );
1750                 /* To not shake screen up and down between preview and live-preview */
1751                 echo "<br style=\"clear:both;\" />\n";
1752         }
1753
1754
1755         /**
1756          * Get a diff between the current contents of the edit box and the
1757          * version of the page we're editing from.
1758          *
1759          * If this is a section edit, we'll replace the section as for final
1760          * save and then make a comparison.
1761          *
1762          * @return string HTML
1763          */
1764         function getDiff() {
1765                 $oldtext = $this->mArticle->fetchContent();
1766                 $newtext = $this->mArticle->replaceSection(
1767                         $this->section, $this->textbox1, $this->summary, $this->edittime );
1768                 $newtext = $this->mArticle->preSaveTransform( $newtext );
1769                 $oldtitle = wfMsgExt( 'currentrev', array('parseinline') );
1770                 $newtitle = wfMsgExt( 'yourtext', array('parseinline') );
1771                 if ( $oldtext !== false  || $newtext != '' ) {
1772                         $de = new DifferenceEngine( $this->mTitle );
1773                         $de->setText( $oldtext, $newtext );
1774                         $difftext = $de->getDiff( $oldtitle, $newtitle );
1775                 } else {
1776                         $difftext = '';
1777                 }
1778
1779                 return '<div id="wikiDiff">' . $difftext . '</div>';
1780         }
1781
1782         /**
1783          * Filter an input field through a Unicode de-armoring process if it
1784          * came from an old browser with known broken Unicode editing issues.
1785          *
1786          * @param WebRequest $request
1787          * @param string $field
1788          * @return string
1789          * @private
1790          */
1791         function safeUnicodeInput( $request, $field ) {
1792                 $text = rtrim( $request->getText( $field ) );
1793                 return $request->getBool( 'safemode' )
1794                         ? $this->unmakesafe( $text )
1795                         : $text;
1796         }
1797
1798         /**
1799          * Filter an output field through a Unicode armoring process if it is
1800          * going to an old browser with known broken Unicode editing issues.
1801          *
1802          * @param string $text
1803          * @return string
1804          * @private
1805          */
1806         function safeUnicodeOutput( $text ) {
1807                 global $wgContLang;
1808                 $codedText = $wgContLang->recodeForEdit( $text );
1809                 return $this->checkUnicodeCompliantBrowser()
1810                         ? $codedText
1811                         : $this->makesafe( $codedText );
1812         }
1813
1814         /**
1815          * A number of web browsers are known to corrupt non-ASCII characters
1816          * in a UTF-8 text editing environment. To protect against this,
1817          * detected browsers will be served an armored version of the text,
1818          * with non-ASCII chars converted to numeric HTML character references.
1819          *
1820          * Preexisting such character references will have a 0 added to them
1821          * to ensure that round-trips do not alter the original data.
1822          *
1823          * @param string $invalue
1824          * @return string
1825          * @private
1826          */
1827         function makesafe( $invalue ) {
1828                 // Armor existing references for reversability.
1829                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
1830
1831                 $bytesleft = 0;
1832                 $result = "";
1833                 $working = 0;
1834                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1835                         $bytevalue = ord( $invalue{$i} );
1836                         if( $bytevalue <= 0x7F ) { //0xxx xxxx
1837                                 $result .= chr( $bytevalue );
1838                                 $bytesleft = 0;
1839                         } elseif( $bytevalue <= 0xBF ) { //10xx xxxx
1840                                 $working = $working << 6;
1841                                 $working += ($bytevalue & 0x3F);
1842                                 $bytesleft--;
1843                                 if( $bytesleft <= 0 ) {
1844                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
1845                                 }
1846                         } elseif( $bytevalue <= 0xDF ) { //110x xxxx
1847                                 $working = $bytevalue & 0x1F;
1848                                 $bytesleft = 1;
1849                         } elseif( $bytevalue <= 0xEF ) { //1110 xxxx
1850                                 $working = $bytevalue & 0x0F;
1851                                 $bytesleft = 2;
1852                         } else { //1111 0xxx
1853                                 $working = $bytevalue & 0x07;
1854                                 $bytesleft = 3;
1855                         }
1856                 }
1857                 return $result;
1858         }
1859
1860         /**
1861          * Reverse the previously applied transliteration of non-ASCII characters
1862          * back to UTF-8. Used to protect data from corruption by broken web browsers
1863          * as listed in $wgBrowserBlackList.
1864          *
1865          * @param string $invalue
1866          * @return string
1867          * @private
1868          */
1869         function unmakesafe( $invalue ) {
1870                 $result = "";
1871                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1872                         if( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
1873                                 $i += 3;
1874                                 $hexstring = "";
1875                                 do {
1876                                         $hexstring .= $invalue{$i};
1877                                         $i++;
1878                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
1879
1880                                 // Do some sanity checks. These aren't needed for reversability,
1881                                 // but should help keep the breakage down if the editor
1882                                 // breaks one of the entities whilst editing.
1883                                 if ((substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6)) {
1884                                         $codepoint = hexdec($hexstring);
1885                                         $result .= codepointToUtf8( $codepoint );
1886                                 } else {
1887                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
1888                                 }
1889                         } else {
1890                                 $result .= substr( $invalue, $i, 1 );
1891                         }
1892                 }
1893                 // reverse the transform that we made for reversability reasons.
1894                 return strtr( $result, array( "&#x0" => "&#x" ) );
1895         }
1896
1897         function noCreatePermission() {
1898                 global $wgOut;
1899                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
1900                 $wgOut->addWikiText( wfMsg( 'nocreatetext' ) );
1901         }
1902
1903 }
1904
1905 ?>