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 = true;
  27
  28         # Form values
  29         var $save = false, $preview = false, $diff = false;
  30         var $minoredit = false, $watchthis = false, $recreate = false;
  31         var $textbox1 = '', $textbox2 = '', $summary = '';
  32         var $edittime = '', $section = '', $starttime = '';
  33         var $oldid = 0, $editintro = '', $scrolltop = null;
  34
  35         /**
  36          * @todo document
  37          * @param $article
  38          */
  39         function EditPage( $article ) {
  40                 $this->mArticle =& $article;
  41                 global $wgTitle;
  42                 $this->mTitle =& $wgTitle;
  43         }
  44
  45         /**
  46          * This is the function that extracts metadata from the article body on the first view.
  47          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
  48          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
  49          */
  50         function extractMetaDataFromArticle () {
  51                 global $wgUseMetadataEdit , $wgMetadataWhitelist , $wgLang ;
  52                 $this->mMetaData = '' ;
  53                 if ( !$wgUseMetadataEdit ) return ;
  54                 if ( $wgMetadataWhitelist == '' ) return ;
  55                 $s = '' ;
  56                 $t = $this->mArticle->getContent();
  57
  58                 # MISSING : <nowiki> filtering
  59
  60                 # Categories and language links
  61                 $t = explode ( "\n" , $t ) ;
  62                 $catlow = strtolower ( $wgLang->getNsText ( NS_CATEGORY ) ) ;
  63                 $cat = $ll = array() ;
  64                 foreach ( $t AS $key => $x )
  65                 {
  66                         $y = trim ( strtolower ( $x ) ) ;
  67                         while ( substr ( $y , 0 , 2 ) == '[[' )
  68                         {
  69                                 $y = explode ( ']]' , trim ( $x ) ) ;
  70                                 $first = array_shift ( $y ) ;
  71                                 $first = explode ( ':' , $first ) ;
  72                                 $ns = array_shift ( $first ) ;
  73                                 $ns = trim ( str_replace ( '[' , '' , $ns ) ) ;
  74                                 if ( strlen ( $ns ) == 2 OR strtolower ( $ns ) == $catlow )
  75                                 {
  76                                         $add = '[[' . $ns . ':' . implode ( ':' , $first ) . ']]' ;
  77                                         if ( strtolower ( $ns ) == $catlow ) $cat[] = $add ;
  78                                         else $ll[] = $add ;
  79                                         $x = implode ( ']]' , $y ) ;
  80                                         $t[$key] = $x ;
  81                                         $y = trim ( strtolower ( $x ) ) ;
  82                                 }
  83                         }
  84                 }
  85                 if ( count ( $cat ) ) $s .= implode ( ' ' , $cat ) . "\n" ;
  86                 if ( count ( $ll ) ) $s .= implode ( ' ' , $ll ) . "\n" ;
  87                 $t = implode ( "\n" , $t ) ;
  88
  89                 # Load whitelist
  90                 $sat = array () ; # stand-alone-templates; must be lowercase
  91                 $wl_title = Title::newFromText ( $wgMetadataWhitelist ) ;
  92                 $wl_article = new Article ( $wl_title ) ;
  93                 $wl = explode ( "\n" , $wl_article->getContent() ) ;
  94                 foreach ( $wl AS $x )
  95                 {
  96                         $isentry = false ;
  97                         $x = trim ( $x ) ;
  98                         while ( substr ( $x , 0 , 1 ) == '*' )
  99                         {
 100                                 $isentry = true ;
 101                                 $x = trim ( substr ( $x , 1 ) ) ;
 102                         }
 103                         if ( $isentry )
 104                         {
 105                                 $sat[] = strtolower ( $x ) ;
 106                         }
 107
 108                 }
 109
 110                 # Templates, but only some
 111                 $t = explode ( '{{' , $t ) ;
 112                 $tl = array () ;
 113                 foreach ( $t AS $key => $x )
 114                 {
 115                         $y = explode ( '}}' , $x , 2 ) ;
 116                         if ( count ( $y ) == 2 )
 117                         {
 118                                 $z = $y[0] ;
 119                                 $z = explode ( '|' , $z ) ;
 120                                 $tn = array_shift ( $z ) ;
 121                                 if ( in_array ( strtolower ( $tn ) , $sat ) )
 122                                 {
 123                                         $tl[] = '{{' . $y[0] . '}}' ;
 124                                         $t[$key] = $y[1] ;
 125                                         $y = explode ( '}}' , $y[1] , 2 ) ;
 126                                 }
 127                                 else $t[$key] = '{{' . $x ;
 128                         }
 129                         else if ( $key != 0 ) $t[$key] = '{{' . $x ;
 130                         else $t[$key] = $x ;
 131                 }
 132                 if ( count ( $tl ) ) $s .= implode ( ' ' , $tl ) ;
 133                 $t = implode ( '' , $t ) ;
 134
 135                 $t = str_replace ( "\n\n\n" , "\n" , $t ) ;
 136                 $this->mArticle->mContent = $t ;
 137                 $this->mMetaData = $s ;
 138         }
 139
 140         function submit() {
 141                 $this->edit();
 142         }
 143
 144         /**
 145          * This is the function that gets called for "action=edit". It
 146          * sets up various member variables, then passes execution to
 147          * another function, usually showEditForm()
 148          *
 149          * The edit form is self-submitting, so that when things like
 150          * preview and edit conflicts occur, we get the same form back
 151          * with the extra stuff added.  Only when the final submission
 152          * is made and all is well do we actually save and redirect to
 153          * the newly-edited page.
 154          */
 155         function edit() {
 156                 global $wgOut, $wgUser, $wgRequest, $wgTitle,
 157                        $wgEmailConfirmToEdit;
 158
 159                 if ( ! wfRunHooks( 'AlternateEdit', array( &$this  ) ) )
 160                         return;
 161
 162                 $fname = 'EditPage::edit';
 163                 wfProfileIn( $fname );
 164                 wfDebug( "$fname: enter\n" );
 165
 166                 // this is not an article
 167                 $wgOut->setArticleFlag(false);
 168
 169                 $this->importFormData( $wgRequest );
 170                 $this->firsttime = false;
 171
 172                 if( $this->live ) {
 173                         $this->livePreview();
 174                         wfProfileOut( $fname );
 175                         return;
 176                 }
 177
 178                 if ( ! $this->mTitle->userCanEdit() ) {
 179                         wfDebug( "$fname: user can't edit\n" );
 180                         $wgOut->readOnlyPage( $this->mArticle->getContent(), true );
 181                         wfProfileOut( $fname );
 182                         return;
 183                 }
 184                 wfDebug( "$fname: Checking blocks\n" );
 185                 if ( !$this->preview && !$this->diff && $wgUser->isBlockedFrom( $this->mTitle, !$this->save ) ) {
 186                         # When previewing, don't check blocked state - will get caught at save time.
 187                         # Also, check when starting edition is done against slave to improve performance.
 188                         wfDebug( "$fname: user is blocked\n" );
 189                         $wgOut->blockedPage();
 190                         wfProfileOut( $fname );
 191                         return;
 192                 }
 193                 if ( !$wgUser->isAllowed('edit') ) {
 194                         if ( $wgUser->isAnon() ) {
 195                                 wfDebug( "$fname: user must log in\n" );
 196                                 $this->userNotLoggedInPage();
 197                                 wfProfileOut( $fname );
 198                                 return;
 199                         } else {
 200                                 wfDebug( "$fname: read-only page\n" );
 201                                 $wgOut->readOnlyPage( $this->mArticle->getContent(), true );
 202                                 wfProfileOut( $fname );
 203                                 return;
 204                         }
 205                 }
 206                 if ($wgEmailConfirmToEdit && !$wgUser->isEmailConfirmed()) {
 207                         wfDebug("$fname: user must confirm e-mail address\n");
 208                         $this->userNotConfirmedPage();
 209                         wfProfileOut($fname);
 210                         return;
 211                 }
 212                 if ( !$this->mTitle->userCan( 'create' ) && !$this->mTitle->exists() ) {
 213                         wfDebug( "$fname: no create permission\n" );
 214                         $this->noCreatePermission();
 215                         wfProfileOut( $fname );
 216                         return;
 217                 }
 218                 if ( wfReadOnly() ) {
 219                         wfDebug( "$fname: read-only mode is engaged\n" );
 220                         if( $this->save || $this->preview ) {
 221                                 $this->formtype = 'preview';
 222                         } else if ( $this->diff ) {
 223                                 $this->formtype = 'diff';
 224                         } else {
 225                                 $wgOut->readOnlyPage( $this->mArticle->getContent() );
 226                                 wfProfileOut( $fname );
 227                                 return;
 228                         }
 229                 } else {
 230                         if ( $this->save ) {
 231                                 $this->formtype = 'save';
 232                         } else if ( $this->preview ) {
 233                                 $this->formtype = 'preview';
 234                         } else if ( $this->diff ) {
 235                                 $this->formtype = 'diff';
 236                         } else { # First time through
 237                                 $this->firsttime = true;
 238                                 if( $this->previewOnOpen() ) {
 239                                         $this->formtype = 'preview';
 240                                 } else {
 241                                         $this->extractMetaDataFromArticle () ;
 242                                         $this->formtype = 'initial';
 243                                 }
 244                         }
 245                 }
 246
 247                 wfProfileIn( "$fname-business-end" );
 248
 249                 $this->isConflict = false;
 250                 // css / js subpages of user pages get a special treatment
 251                 $this->isCssJsSubpage = $wgTitle->isCssJsSubpage();
 252
 253                 /* Notice that we can't use isDeleted, because it returns true if article is ever deleted
 254                  * no matter it's current state
 255                  */
 256                 $this->deletedSinceEdit = false;
 257                 if ( $this->edittime != '' ) {
 258                         /* Note that we rely on logging table, which hasn't been always there,
 259                          * but that doesn't matter, because this only applies to brand new
 260                          * deletes. This is done on every preview and save request. Move it further down
 261                          * to only perform it on saves
 262                          */
 263                         if ( $this->mTitle->isDeleted() ) {
 264                                 $this->lastDelete = $this->getLastDelete();
 265                                 if ( !is_null($this->lastDelete) ) {
 266                                         $deletetime = $this->lastDelete->log_timestamp;
 267                                         if ( ($deletetime - $this->starttime) > 0 ) {
 268                                                 $this->deletedSinceEdit = true;
 269                                         }
 270                                 }
 271                         }
 272                 }
 273
 274                 if(!$this->mTitle->getArticleID() && ('initial' == $this->formtype || $this->firsttime )) { # new article
 275                         $this->showIntro();
 276                 }
 277                 if( $this->mTitle->isTalkPage() ) {
 278                         $wgOut->addWikiText( wfMsg( 'talkpagetext' ) );
 279                 }
 280
 281                 # Attempt submission here.  This will check for edit conflicts,
 282                 # and redundantly check for locked database, blocked IPs, etc.
 283                 # that edit() already checked just in case someone tries to sneak
 284                 # in the back door with a hand-edited submission URL.
 285
 286                 if ( 'save' == $this->formtype ) {
 287                         if ( !$this->attemptSave() ) {
 288                                 wfProfileOut( "$fname-business-end" );
 289                                 wfProfileOut( $fname );
 290                                 return;
 291                         }
 292                 }
 293
 294                 # First time through: get contents, set time for conflict
 295                 # checking, etc.
 296                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 297                         $this->initialiseForm();
 298                 }
 299
 300                 $this->showEditForm();
 301                 wfProfileOut( "$fname-business-end" );
 302                 wfProfileOut( $fname );
 303         }
 304
 305         /**
 306          * Return true if this page should be previewed when the edit form
 307          * is initially opened.
 308          * @return bool
 309          * @access private
 310          */
 311         function previewOnOpen() {
 312                 global $wgUser;
 313                 return $this->section != 'new' &&
 314                         ( ( $wgUser->getOption( 'previewonfirst' ) && $this->mTitle->exists() ) ||
 315                                 ( $this->mTitle->getNamespace() == NS_CATEGORY &&
 316                                         !$this->mTitle->exists() ) );
 317         }
 318
 319         /**
 320          * @todo document
 321          */
 322         function importFormData( &$request ) {
 323                 global $wgLang ;
 324                 $fname = 'EditPage::importFormData';
 325                 wfProfileIn( $fname );
 326
 327                 if( $request->wasPosted() ) {
 328                         # These fields need to be checked for encoding.
 329                         # Also remove trailing whitespace, but don't remove _initial_
 330                         # whitespace from the text boxes. This may be significant formatting.
 331                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 332                         $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
 333                         $this->mMetaData = rtrim( $request->getText( 'metadata'   ) );
 334                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 335                         $this->summary   = $wgLang->truncate( $request->getText( 'wpSummary'  ), 250 );
 336
 337                         $this->edittime = $request->getVal( 'wpEdittime' );
 338                         $this->starttime = $request->getVal( 'wpStarttime' );
 339
 340                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 341
 342                         if( is_null( $this->edittime ) ) {
 343                                 # If the form is incomplete, force to preview.
 344                                 wfDebug( "$fname: Form data appears to be incomplete\n" );
 345                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 346                                 $this->preview  = true;
 347                         } else {
 348                                 $this->preview = $request->getCheck( 'wpPreview' );
 349                                 $this->diff = $request->getCheck( 'wpDiff' );
 350
 351                                 if( !$this->preview ) {
 352                                         if ( $this->tokenOk( $request ) ) {
 353                                                 # Some browsers will not report any submit button
 354                                                 # if the user hits enter in the comment box.
 355                                                 # The unmarked state will be assumed to be a save,
 356                                                 # if the form seems otherwise complete.
 357                                                 wfDebug( "$fname: Passed token check.\n" );
 358                                         } else {
 359                                                 # Page might be a hack attempt posted from
 360                                                 # an external site. Preview instead of saving.
 361                                                 wfDebug( "$fname: Failed token check; forcing preview\n" );
 362                                                 $this->preview = true;
 363                                         }
 364                                 }
 365                         }
 366                         $this->save    = ! ( $this->preview OR $this->diff );
 367                         if( !preg_match( '/^\d{14}$/', $this->edittime )) {
 368                                 $this->edittime = null;
 369                         }
 370
 371                         if( !preg_match( '/^\d{14}$/', $this->starttime )) {
 372                                 $this->starttime = null;
 373                         }
 374
 375                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 376
 377                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 378                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 379                 } else {
 380                         # Not a posted form? Start with nothing.
 381                         wfDebug( "$fname: Not a posted form.\n" );
 382                         $this->textbox1  = '';
 383                         $this->textbox2  = '';
 384                         $this->mMetaData = '';
 385                         $this->summary   = '';
 386                         $this->edittime  = '';
 387                         $this->starttime = wfTimestampNow();
 388                         $this->preview   = false;
 389                         $this->save      = false;
 390                         $this->diff      = false;
 391                         $this->minoredit = false;
 392                         $this->watchthis = false;
 393                         $this->recreate  = false;
 394                 }
 395
 396                 $this->oldid = $request->getInt( 'oldid' );
 397
 398                 # Section edit can come from either the form or a link
 399                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 400
 401                 $this->live = $request->getCheck( 'live' );
 402                 $this->editintro = $request->getText( 'editintro' );
 403
 404                 wfProfileOut( $fname );
 405         }
 406
 407         /**
 408          * Make sure the form isn't faking a user's credentials.
 409          *
 410          * @param WebRequest $request
 411          * @return bool
 412          * @access private
 413          */
 414         function tokenOk( &$request ) {
 415                 global $wgUser;
 416                 if( $wgUser->isAnon() ) {
 417                         # Anonymous users may not have a session
 418                         # open. Don't tokenize.
 419                         $this->mTokenOk = true;
 420                 } else {
 421                         $this->mTokenOk = $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
 422                 }
 423                 return $this->mTokenOk;
 424         }
 425
 426         function showIntro() {
 427                 global $wgOut, $wgUser;
 428                 $addstandardintro=true;
 429                 if($this->editintro) {
 430                         $introtitle=Title::newFromText($this->editintro);
 431                         if(isset($introtitle) && $introtitle->userCanRead()) {
 432                                 $rev=Revision::newFromTitle($introtitle);
 433                                 if($rev) {
 434                                         $wgOut->addSecondaryWikiText($rev->getText());
 435                                         $addstandardintro=false;
 436                                 }
 437                         }
 438                 }
 439                 if($addstandardintro) {
 440                         if ( $wgUser->isLoggedIn() )
 441                                 $wgOut->addWikiText( wfMsg( 'newarticletext' ) );
 442                         else
 443                                 $wgOut->addWikiText( wfMsg( 'newarticletextanon' ) );
 444                 }
 445         }
 446
 447         /**
 448          * Attempt submission
 449          * @return bool false if output is done, true if the rest of the form should be displayed
 450          */
 451         function attemptSave() {
 452                 global $wgSpamRegex, $wgFilterCallback, $wgUser, $wgOut;
 453
 454                 $fname = 'EditPage::attemptSave';
 455                 wfProfileIn( $fname );
 456                 wfProfileIn( "$fname-checks" );
 457
 458                 # Reintegrate metadata
 459                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 460                 $this->mMetaData = '' ;
 461
 462                 # Check for spam
 463                 if ( $wgSpamRegex && preg_match( $wgSpamRegex, $this->textbox1, $matches ) ) {
 464                         $this->spamPage ( $matches[0] );
 465                         wfProfileOut( "$fname-checks" );
 466                         wfProfileOut( $fname );
 467                         return false;
 468                 }
 469                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section ) ) {
 470                         # Error messages or other handling should be performed by the filter function
 471                         wfProfileOut( $fname );
 472                         wfProfileOut( "$fname-checks" );
 473                         return false;
 474                 }
 475                 if ( !wfRunHooks( 'EditFilter', array( &$this, $this->textbox1, $this->section ) ) ) {
 476                         # Error messages or other handling should be performed by the filter function
 477                         wfProfileOut( $fname );
 478                         wfProfileOut( "$fname-checks" );
 479                         return false;
 480                 }
 481                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 482                         # Check block state against master, thus 'false'.
 483                         $this->blockedIPpage();
 484                         wfProfileOut( "$fname-checks" );
 485                         wfProfileOut( $fname );
 486                         return false;
 487                 }
 488
 489                 if ( !$wgUser->isAllowed('edit') ) {
 490                         if ( $wgUser->isAnon() ) {
 491                                 $this->userNotLoggedInPage();
 492                                 wfProfileOut( "$fname-checks" );
 493                                 wfProfileOut( $fname );
 494                                 return false;
 495                         }
 496                         else {
 497                                 $wgOut->readOnlyPage();
 498                                 wfProfileOut( "$fname-checks" );
 499                                 wfProfileOut( $fname );
 500                                 return false;
 501                         }
 502                 }
 503
 504                 if ( wfReadOnly() ) {
 505                         $wgOut->readOnlyPage();
 506                         wfProfileOut( "$fname-checks" );
 507                         wfProfileOut( $fname );
 508                         return false;
 509                 }
 510                 if ( $wgUser->pingLimiter() ) {
 511                         $wgOut->rateLimited();
 512                         wfProfileOut( "$fname-checks" );
 513                         wfProfileOut( $fname );
 514                         return false;
 515                 }
 516
 517                 # If the article has been deleted while editing, don't save it without
 518                 # confirmation
 519                 if ( $this->deletedSinceEdit && !$this->recreate ) {
 520                         wfProfileOut( "$fname-checks" );
 521                         wfProfileOut( $fname );
 522                         return true;
 523                 }
 524
 525                 wfProfileOut( "$fname-checks" );
 526
 527                 # If article is new, insert it.
 528                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 529                 if ( 0 == $aid ) {
 530                         // Late check for create permission, just in case *PARANOIA*
 531                         if ( !$this->mTitle->userCan( 'create' ) ) {
 532                                 wfDebug( "$fname: no create permission\n" );
 533                                 $this->noCreatePermission();
 534                                 wfProfileOut( $fname );
 535                                 return;
 536                         }
 537
 538                         # Don't save a new article if it's blank.
 539                         if ( ( '' == $this->textbox1 ) ) {
 540                                         $wgOut->redirect( $this->mTitle->getFullURL() );
 541                                         wfProfileOut( $fname );
 542                                         return false;
 543                         }
 544
 545                         $isComment=($this->section=='new');
 546                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 547                                 $this->minoredit, $this->watchthis, false, $isComment);
 548
 549                         wfProfileOut( $fname );
 550                         return false;
 551                 }
 552
 553                 # Article exists. Check for edit conflict.
 554
 555                 $this->mArticle->clear(); # Force reload of dates, etc.
 556                 $this->mArticle->forUpdate( true ); # Lock the article
 557
 558                 if( $this->mArticle->getTimestamp() != $this->edittime ) {
 559                         $this->isConflict = true;
 560                         if( $this->section == 'new' ) {
 561                                 if( $this->mArticle->getUserText() == $wgUser->getName() &&
 562                                         $this->mArticle->getComment() == $this->summary ) {
 563                                         // Probably a duplicate submission of a new comment.
 564                                         // This can happen when squid resends a request after
 565                                         // a timeout but the first one actually went through.
 566                                         wfDebug( "EditPage::editForm duplicate new section submission; trigger edit conflict!\n" );
 567                                 } else {
 568                                         // New comment; suppress conflict.
 569                                         $this->isConflict = false;
 570                                         wfDebug( "EditPage::editForm conflict suppressed; new section\n" );
 571                                 }
 572                         }
 573                 }
 574                 $userid = $wgUser->getID();
 575
 576                 if ( $this->isConflict) {
 577                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 578                                 $this->mArticle->getTimestamp() . "'\n" );
 579                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime);
 580                 }
 581                 else {
 582                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 583                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary);
 584                 }
 585                 if( is_null( $text ) ) {
 586                         wfDebug( "EditPage::editForm activating conflict; section replace failed.\n" );
 587                         $this->isConflict = true;
 588                         $text = $this->textbox1;
 589                 }
 590
 591                 # Suppress edit conflict with self, except for section edits where merging is required.
 592                 if ( ( $this->section == '' ) && ( 0 != $userid ) && ( $this->mArticle->getUser() == $userid ) ) {
 593                         wfDebug( "Suppressing edit conflict, same user.\n" );
 594                         $this->isConflict = false;
 595                 } else {
 596                         # switch from section editing to normal editing in edit conflict
 597                         if($this->isConflict) {
 598                                 # Attempt merge
 599                                 if( $this->mergeChangesInto( $text ) ){
 600                                         // Successful merge! Maybe we should tell the user the good news?
 601                                         $this->isConflict = false;
 602                                         wfDebug( "Suppressing edit conflict, successful merge.\n" );
 603                                 } else {
 604                                         $this->section = '';
 605                                         $this->textbox1 = $text;
 606                                         wfDebug( "Keeping edit conflict, failed merge.\n" );
 607                                 }
 608                         }
 609                 }
 610
 611                 if ( $this->isConflict ) {
 612                         wfProfileOut( $fname );
 613                         return true;
 614                 }
 615
 616                 # All's well
 617                 wfProfileIn( "$fname-sectionanchor" );
 618                 $sectionanchor = '';
 619                 if( $this->section == 'new' ) {
 620                         if( $this->summary != '' ) {
 621                                 $sectionanchor = $this->sectionAnchor( $this->summary );
 622                         }
 623                 } elseif( $this->section != '' ) {
 624                         # Try to get a section anchor from the section source, redirect to edited section if header found
 625                         # XXX: might be better to integrate this into Article::replaceSection
 626                         # for duplicate heading checking and maybe parsing
 627                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 628                         # we can't deal with anchors, includes, html etc in the header for now,
 629                         # headline would need to be parsed to improve this
 630                         if($hasmatch and strlen($matches[2]) > 0) {
 631                                 $sectionanchor = $this->sectionAnchor( $matches[2] );
 632                         }
 633                 }
 634                 wfProfileOut( "$fname-sectionanchor" );
 635
 636                 // Save errors may fall down to the edit form, but we've now
 637                 // merged the section into full text. Clear the section field
 638                 // so that later submission of conflict forms won't try to
 639                 // replace that into a duplicated mess.
 640                 $this->textbox1 = $text;
 641                 $this->section = '';
 642
 643                 # update the article here
 644                 if( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
 645                         $this->watchthis, '', $sectionanchor ) ) {
 646                         wfProfileOut( $fname );
 647                         return false;
 648                 } else {
 649                         $this->isConflict = true;
 650                 }
 651                 wfProfileOut( $fname );
 652                 return true;
 653         }
 654
 655         /**
 656          * Initialise form fields in the object
 657          * Called on the first invocation, e.g. when a user clicks an edit link
 658          */
 659         function initialiseForm() {
 660                 $this->edittime = $this->mArticle->getTimestamp();
 661                 $this->textbox1 = $this->mArticle->getContent();
 662                 $this->summary = '';
 663                 if ( !$this->mArticle->exists() && $this->mArticle->mTitle->getNamespace() == NS_MEDIAWIKI )
 664                         $this->textbox1 = wfMsgWeirdKey ( $this->mArticle->mTitle->getText() ) ;
 665                 wfProxyCheck();
 666         }
 667
 668         /**
 669          * Send the edit form and related headers to $wgOut
 670          * @param $formCallback Optional callable that takes an OutputPage
 671          *                      parameter; will be called during form output
 672          *                      near the top, for captchas and the like.
 673          */
 674         function showEditForm( $formCallback=null ) {
 675                 global $wgOut, $wgUser, $wgLang, $wgContLang;
 676
 677                 $fname = 'EditPage::showEditForm';
 678                 wfProfileIn( $fname );
 679
 680                 $sk =& $wgUser->getSkin();
 681
 682                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) ) ;
 683
 684                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 685
 686                 # Enabled article-related sidebar, toplinks, etc.
 687                 $wgOut->setArticleRelated( true );
 688
 689                 if ( $this->isConflict ) {
 690                         $s = wfMsg( 'editconflict', $this->mTitle->getPrefixedText() );
 691                         $wgOut->setPageTitle( $s );
 692                         $wgOut->addWikiText( wfMsg( 'explainconflict' ) );
 693
 694                         $this->textbox2 = $this->textbox1;
 695                         $this->textbox1 = $this->mArticle->getContent();
 696                         $this->edittime = $this->mArticle->getTimestamp();
 697                 } else {
 698
 699                         if( $this->section != '' ) {
 700                                 if( $this->section == 'new' ) {
 701                                         $s = wfMsg('editingcomment', $this->mTitle->getPrefixedText() );
 702                                 } else {
 703                                         $s = wfMsg('editingsection', $this->mTitle->getPrefixedText() );
 704                                         if( !$this->preview && !$this->diff ) {
 705                                                 preg_match( "/^(=+)(.+)\\1/mi",
 706                                                         $this->textbox1,
 707                                                         $matches );
 708                                                 if( !empty( $matches[2] ) ) {
 709                                                         $this->summary = "/* ". trim($matches[2])." */ ";
 710                                                 }
 711                                         }
 712                                 }
 713                         } else {
 714                                 $s = wfMsg( 'editing', $this->mTitle->getPrefixedText() );
 715                         }
 716                         $wgOut->setPageTitle( $s );
 717                         if ( !$this->checkUnicodeCompliantBrowser() ) {
 718                                 $wgOut->addWikiText( wfMsg( 'nonunicodebrowser') );
 719                         }
 720                         if ( isset( $this->mArticle )
 721                              && isset( $this->mArticle->mRevision )
 722                              && !$this->mArticle->mRevision->isCurrent() ) {
 723                                 $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
 724                                 $wgOut->addWikiText( wfMsg( 'editingold' ) );
 725                         }
 726                 }
 727
 728                 if( wfReadOnly() ) {
 729                         $wgOut->addWikiText( wfMsg( 'readonlywarning' ) );
 730                 } else if ( $this->isCssJsSubpage and 'preview' != $this->formtype) {
 731                         $wgOut->addWikiText( wfMsg( 'usercssjsyoucanpreview' ));
 732                 } else if( $wgUser->isAnon() && $this->formtype != 'preview' ) {
 733                         $wgOut->addWikiText( wfMsg( 'anoneditwarning' ) );
 734                 }
 735
 736                 if( $this->mTitle->isProtected( 'edit' ) ) {
 737                         if( $this->mTitle->isSemiProtected() ) {
 738                                 $notice = wfMsg( 'semiprotectedpagewarning' );
 739                                 if( wfEmptyMsg( 'semiprotectedpagewarning', $notice ) || $notice == '-' ) {
 740                                         $notice = '';
 741                                 }
 742                         } else {
 743                                 $notice = wfMsg( 'protectedpagewarning' );
 744                         }
 745                         $wgOut->addWikiText( $notice );
 746                 }
 747
 748                 $kblength = (int)(strlen( $this->textbox1 ) / 1024);
 749                 if( $kblength > 29 ) {
 750                         $wgOut->addWikiText( wfMsg( 'longpagewarning', $wgLang->formatNum( $kblength ) ) );
 751                 }
 752
 753                 $rows = $wgUser->getOption( 'rows' );
 754                 $cols = $wgUser->getOption( 'cols' );
 755
 756                 $ew = $wgUser->getOption( 'editwidth' );
 757                 if ( $ew ) $ew = " style=\"width:100%\"";
 758                 else $ew = '';
 759
 760                 $q = 'action=submit';
 761                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
 762                 $action = $this->mTitle->escapeLocalURL( $q );
 763
 764                 $summary = wfMsg('summary');
 765                 $subject = wfMsg('subject');
 766                 $minor   = wfMsg('minoredit');
 767                 $watchthis = wfMsg ('watchthis');
 768                 $save = wfMsg('savearticle');
 769                 $prev = wfMsg('showpreview');
 770                 $diff = wfMsg('showdiff');
 771
 772                 $cancel = $sk->makeKnownLink( $this->mTitle->getPrefixedText(),
 773                                 wfMsg('cancel') );
 774                 $edithelpurl = $sk->makeInternalOrExternalUrl( wfMsg( 'edithelppage' ));
 775                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
 776                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
 777                         htmlspecialchars( wfMsg( 'newwindow' ) );
 778
 779                 global $wgRightsText;
 780                 $copywarn = "<div id=\"editpage-copywarn\">\n" .
 781                         wfMsg( $wgRightsText ? 'copyrightwarning' : 'copyrightwarning2',
 782                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
 783                                 $wgRightsText ) . "\n</div>";
 784
 785                 if( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
 786                         # prepare toolbar for edit buttons
 787                         $toolbar = $this->getEditToolbar();
 788                 } else {
 789                         $toolbar = '';
 790                 }
 791
 792                 // activate checkboxes if user wants them to be always active
 793                 if( !$this->preview && !$this->diff ) {
 794                         if( $wgUser->getOption( 'watchdefault' ) ) $this->watchthis = true;
 795                         if( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
 796
 797                         // activate checkbox also if user is already watching the page,
 798                         // require wpWatchthis to be unset so that second condition is not
 799                         // checked unnecessarily
 800                         if( !$this->watchthis && $this->mTitle->userIsWatching() ) $this->watchthis = true;
 801                 }
 802
 803                 $minoredithtml = '';
 804
 805                 if ( $wgUser->isAllowed('minoredit') ) {
 806                         $minoredithtml =
 807                                 "<input tabindex='3' type='checkbox' value='1' name='wpMinoredit'".($this->minoredit?" checked='checked'":"").
 808                                 " accesskey='".wfMsg('accesskey-minoredit')."' id='wpMinoredit' />".
 809                                 "<label for='wpMinoredit' title='".wfMsg('tooltip-minoredit')."'>{$minor}</label>";
 810                 }
 811
 812                 $watchhtml = '';
 813
 814                 if ( $wgUser->isLoggedIn() ) {
 815                         $watchhtml = "<input tabindex='4' type='checkbox' name='wpWatchthis'".
 816                                 ($this->watchthis?" checked='checked'":"").
 817                                 " accesskey=\"".htmlspecialchars(wfMsg('accesskey-watch'))."\" id='wpWatchthis'  />".
 818                                 "<label for='wpWatchthis' title=\"" .
 819                                         htmlspecialchars(wfMsg('tooltip-watch'))."\">{$watchthis}</label>";
 820                 }
 821
 822                 $checkboxhtml = $minoredithtml . $watchhtml;
 823
 824                 if ( 'preview' == $this->formtype && $wgUser->getOption( 'previewontop' ) ) {
 825                         $this->showPreview();
 826                 }
 827                 if ( 'diff' == $this->formtype ) {
 828                         if ( $wgUser->getOption('previewontop' ) ) {
 829                                 $wgOut->addHTML( $this->getDiff() );
 830                         }
 831                 }
 832
 833
 834                 # if this is a comment, show a subject line at the top, which is also the edit summary.
 835                 # Otherwise, show a summary field at the bottom
 836                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
 837                 if( $this->section == 'new' ) {
 838                         $commentsubject="<span id='wpSummaryLabel'><label for='wpSummary'>{$subject}:</label></span> <div class='editOptions'><input tabindex='1' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
 839                         $editsummary = '';
 840                 } else {
 841                         $commentsubject = '';
 842                         $editsummary="<span id='wpSummaryLabel'><label for='wpSummary'>{$summary}:</label></span> <div class='editOptions'><input tabindex='2' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
 843                 }
 844
 845                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
 846                 if( !$this->preview && !$this->diff ) {
 847                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
 848                 }
 849                 $templates = $this->formatTemplates();
 850
 851                 global $wgLivePreview;
 852                 if ( $wgLivePreview ) {
 853                         $liveOnclick = $this->doLivePreviewScript();
 854                 } else {
 855                         $liveOnclick = '';
 856                 }
 857
 858                 global $wgUseMetadataEdit ;
 859                 if ( $wgUseMetadataEdit ) {
 860                         $metadata = $this->mMetaData ;
 861                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
 862                         $helppage = Title::newFromText( wfMsg( "metadata_page" ) ) ;
 863                         $top = wfMsg( 'metadata', $helppage->getLocalURL() );
 864                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
 865                 }
 866                 else $metadata = "" ;
 867
 868                 $hidden = '';
 869                 $recreate = '';
 870                 if ($this->deletedSinceEdit) {
 871                         if ( 'save' != $this->formtype ) {
 872                                 $wgOut->addWikiText( wfMsg('deletedwhileediting'));
 873                         } else {
 874                                 // Hide the toolbar and edit area, use can click preview to get it back
 875                                 // Add an confirmation checkbox and explanation.
 876                                 $toolbar = '';
 877                                 $hidden = 'type="hidden" style="display:none;"';
 878                                 $recreate = $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ));
 879                                 $recreate .=
 880                                         "<br /><input tabindex='1' type='checkbox' value='1' name='wpRecreate' id='wpRecreate' />".
 881                                         "<label for='wpRecreate' title='".wfMsg('tooltip-recreate')."'>". wfMsg('recreate')."</label>";
 882                         }
 883                 }
 884
 885                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
 886                         ? ""
 887                         : "<input type='hidden' name=\"safemode\" value='1' />\n";
 888
 889                 $wgOut->addHTML( <<<END
 890 {$toolbar}
 891 <form id="editform" name="editform" method="post" action="$action"
 892 enctype="multipart/form-data">
 893 END
 894 );
 895                 if( is_callable( $formCallback ) ) {
 896                         call_user_func_array( $formCallback, array( &$wgOut ) );
 897                 }
 898
 899                 // Put these up at the top to ensure they aren't lost on early form submission
 900                 $wgOut->addHTML( "
 901 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
 902 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
 903 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
 904 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
 905
 906                 $wgOut->addHTML( <<<END
 907 $recreate
 908 {$commentsubject}
 909 <textarea tabindex='1' accesskey="," name="wpTextbox1" id="wpTextbox1" rows='{$rows}'
 910 cols='{$cols}'{$ew} $hidden>
 911 END
 912 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox1 ) ) .
 913 "
 914 </textarea>
 915
 916                 " );
 917
 918                 $wgOut->addWikiText( $copywarn );
 919
 920                 $wgOut->addHTML( "
 921 {$metadata}
 922 {$editsummary}
 923 {$checkboxhtml}
 924 {$safemodehtml}
 925 ");
 926
 927                 $wgOut->addHTML( "
 928 <div class='editButtons'>
 929 <input tabindex='5' id='wpSave' type='submit' value=\"{$save}\" name=\"wpSave\" accesskey=\"".wfMsg('accesskey-save')."\"".
 930 " title=\"".wfMsg('tooltip-save')."\"/>
 931 <input tabindex='6' id='wpPreview' type='submit' $liveOnclick value=\"{$prev}\" name=\"wpPreview\" accesskey=\"".wfMsg('accesskey-preview')."\"".
 932 " title=\"".wfMsg('tooltip-preview')."\"/>
 933 <input tabindex='7' id='wpDiff' type='submit' value=\"{$diff}\" name=\"wpDiff\" accesskey=\"".wfMsg('accesskey-diff')."\"".
 934 " title=\"".wfMsg('tooltip-diff')."\"/> <span class='editHelp'>{$cancel} | {$edithelp}</span></div>
 935 </div>
 936 " );
 937
 938                 $wgOut->addWikiText( wfMsgForContent( 'edittools' ) );
 939
 940                 $wgOut->addHTML( "
 941 <div class='templatesUsed'>
 942 {$templates}
 943 </div>
 944 " );
 945
 946                 if ( $wgUser->isLoggedIn() ) {
 947                         /**
 948                          * To make it harder for someone to slip a user a page
 949                          * which submits an edit form to the wiki without their
 950                          * knowledge, a random token is associated with the login
 951                          * session. If it's not passed back with the submission,
 952                          * we won't save the page, or render user JavaScript and
 953                          * CSS previews.
 954                          */
 955                         $token = htmlspecialchars( $wgUser->editToken() );
 956                         $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
 957                 }
 958
 959
 960                 if ( $this->isConflict ) {
 961                         require_once( "DifferenceEngine.php" );
 962                         $wgOut->addWikiText( '==' . wfMsg( "yourdiff" ) . '==' );
 963
 964                         $de = new DifferenceEngine( $this->mTitle );
 965                         $de->setText( $this->textbox2, $this->textbox1 );
 966                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
 967
 968                         $wgOut->addWikiText( '==' . wfMsg( "yourtext" ) . '==' );
 969                         $wgOut->addHTML( "<textarea tabindex=6 id='wpTextbox2' name=\"wpTextbox2\" rows='{$rows}' cols='{$cols}' wrap='virtual'>"
 970                                 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox2 ) ) . "\n</textarea>" );
 971                 }
 972                 $wgOut->addHTML( "</form>\n" );
 973                 if ( $this->formtype == 'preview' && !$wgUser->getOption( 'previewontop' ) ) {
 974                         $this->showPreview();
 975                 }
 976                 if ( $this->formtype == 'diff' && !$wgUser->getOption( 'previewontop' ) ) {
 977                         #$wgOut->addHTML( '<div id="wikiPreview">' . $difftext . '</div>' );
 978                         $wgOut->addHTML( $this->getDiff() );
 979                 }
 980
 981                 wfProfileOut( $fname );
 982         }
 983
 984         /**
 985          * Append preview output to $wgOut.
 986          * Includes category rendering if this is a category page.
 987          * @access private
 988          */
 989         function showPreview() {
 990                 global $wgOut;
 991                 $wgOut->addHTML( '<div id="wikiPreview">' );
 992                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
 993                         $this->mArticle->openShowCategory();
 994                 }
 995                 $previewOutput = $this->getPreviewText();
 996                 $wgOut->addHTML( $previewOutput );
 997                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
 998                         $this->mArticle->closeShowCategory();
 999                 }
1000                 $wgOut->addHTML( "<br style=\"clear:both;\" />\n" );
1001                 $wgOut->addHTML( '</div>' );
1002         }
1003
1004         /**
1005          * Prepare a list of templates used by this page. Returns HTML.
1006          */
1007         function formatTemplates() {
1008                 global $wgUser;
1009
1010                 $fname = 'EditPage::formatTemplates';
1011                 wfProfileIn( $fname );
1012
1013                 $sk =& $wgUser->getSkin();
1014
1015                 $outText = '';
1016                 $templates = $this->mArticle->getUsedTemplates();
1017                 if ( count( $templates ) > 0 ) {
1018                         # Do a batch existence check
1019                         $batch = new LinkBatch;
1020                         foreach( $templates as $title ) {
1021                                 $batch->addObj( $title );
1022                         }
1023                         $batch->execute();
1024
1025                         # Construct the HTML
1026                         $outText = '<br />'. wfMsg( 'templatesused' ) . '<ul>';
1027                         foreach ( $templates as $titleObj ) {
1028                                 $outText .= '<li>' . $sk->makeLinkObj( $titleObj ) . '</li>';
1029                         }
1030                         $outText .= '</ul>';
1031                 }
1032                 wfProfileOut( $fname );
1033                 return $outText;
1034         }
1035
1036         /**
1037          * Live Preview lets us fetch rendered preview page content and
1038          * add it to the page without refreshing the whole page.
1039          * If not supported by the browser it will fall through to the normal form
1040          * submission method.
1041          *
1042          * This function outputs a script tag to support live preview, and
1043          * returns an onclick handler which should be added to the attributes
1044          * of the preview button
1045          */
1046         function doLivePreviewScript() {
1047                 global $wgStylePath, $wgJsMimeType, $wgOut;
1048                 $wgOut->addHTML( '<script type="'.$wgJsMimeType.'" src="' .
1049                         htmlspecialchars( $wgStylePath . '/common/preview.js' ) .
1050                         '"></script>' . "\n" );
1051                 $liveAction = $wgTitle->getLocalUrl( 'action=submit&wpPreview=true&live=true' );
1052                 return 'onclick="return !livePreview('.
1053                         'getElementById(\'wikiPreview\'),' .
1054                         'editform.wpTextbox1.value,' .
1055                         htmlspecialchars( '"' . $liveAction . '"' ) . ')"';
1056         }
1057
1058         function getLastDelete() {
1059                 $dbr =& wfGetDB( DB_SLAVE );
1060                 $fname = 'EditPage::getLastDelete';
1061                 $res = $dbr->select(
1062                         array( 'logging', 'user' ),
1063                         array( 'log_type',
1064                                'log_action',
1065                                'log_timestamp',
1066                                'log_user',
1067                                'log_namespace',
1068                                'log_title',
1069                                'log_comment',
1070                                'log_params',
1071                                'user_name', ),
1072                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1073                                'log_title' => $this->mTitle->getDBkey(),
1074                                'log_type' => 'delete',
1075                                'log_action' => 'delete',
1076                                'user_id=log_user' ),
1077                         $fname,
1078                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
1079
1080                 if($dbr->numRows($res) == 1) {
1081                         while ( $x = $dbr->fetchObject ( $res ) )
1082                                 $data = $x;
1083                         $dbr->freeResult ( $res ) ;
1084                 } else {
1085                         $data = null;
1086                 }
1087                 return $data;
1088         }
1089
1090         /**
1091          * @todo document
1092          */
1093         function getPreviewText() {
1094                 global $wgOut, $wgUser, $wgTitle, $wgParser;
1095
1096                 $fname = 'EditPage::getPreviewText';
1097                 wfProfileIn( $fname );
1098
1099                 if ( $this->mTokenOk ) {
1100                         $msg = 'previewnote';
1101                 } else {
1102                         $msg = 'session_fail_preview';
1103                 }
1104                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
1105                         "<div class='previewnote'>" . $wgOut->parse( wfMsg( $msg ) ) . "</div>\n";
1106                 if ( $this->isConflict ) {
1107                         $previewhead.='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1108                 }
1109
1110                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1111                 $parserOptions->setEditSection( false );
1112
1113                 # don't parse user css/js, show message about preview
1114                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1115
1116                 if ( $this->isCssJsSubpage ) {
1117                         if(preg_match("/\\.css$/", $wgTitle->getText() ) ) {
1118                                 $previewtext = wfMsg('usercsspreview');
1119                         } else if(preg_match("/\\.js$/", $wgTitle->getText() ) ) {
1120                                 $previewtext = wfMsg('userjspreview');
1121                         }
1122                         $parserOptions->setTidy(true);
1123                         $parserOutput = $wgParser->parse( $previewtext , $wgTitle, $parserOptions );
1124                         $wgOut->addHTML( $parserOutput->mText );
1125                         wfProfileOut( $fname );
1126                         return $previewhead;
1127                 } else {
1128                         # if user want to see preview when he edit an article
1129                         if( $wgUser->getOption('previewonfirst') and ($this->textbox1 == '')) {
1130                                 $this->textbox1 = $this->mArticle->getContent();
1131                         }
1132
1133                         $toparse = $this->textbox1;
1134
1135                         # If we're adding a comment, we need to show the
1136                         # summary as the headline
1137                         if($this->section=="new" && $this->summary!="") {
1138                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1139                         }
1140
1141                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData ;
1142                         $parserOptions->setTidy(true);
1143                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ) ."\n\n",
1144                                         $wgTitle, $parserOptions );
1145
1146                         $previewHTML = $parserOutput->getText();
1147                         $wgOut->addParserOutputNoText( $parserOutput );
1148
1149                         wfProfileOut( $fname );
1150                         return $previewhead . $previewHTML;
1151                 }
1152         }
1153
1154         /**
1155          * @todo document
1156          */
1157         function blockedIPpage() {
1158                 global $wgOut;
1159                 $wgOut->blockedPage();
1160         }
1161
1162         /**
1163          * @todo document
1164          */
1165         function userNotLoggedInPage() {
1166                 global $wgOut;
1167
1168                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1169                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1170                 $wgOut->setArticleRelated( false );
1171
1172                 $wgOut->addWikiText( wfMsg( 'whitelistedittext' ) );
1173                 $wgOut->returnToMain( false );
1174         }
1175
1176         /**
1177          * Creates a basic error page which informs the user that
1178          * they have to validate their email address before being
1179          * allowed to edit.
1180          */
1181         function userNotConfirmedPage() {
1182
1183                 global $wgOut;
1184
1185                 $wgOut->setPageTitle( wfMsg( 'confirmedittitle' ) );
1186                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1187                 $wgOut->setArticleRelated( false );
1188                 $wgOut->addWikiText( wfMsg( 'confirmedittext' ) );
1189                 $wgOut->returnToMain( false );
1190         }
1191
1192         /**
1193          * @todo document
1194          */
1195         function spamPage ( $match = false )
1196         {
1197                 global $wgOut;
1198                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1199                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1200                 $wgOut->setArticleRelated( false );
1201
1202                 $wgOut->addWikiText( wfMsg( 'spamprotectiontext' ) );
1203                 if ( $match ) {
1204                         $wgOut->addWikiText( wfMsg( 'spamprotectionmatch', "<nowiki>{$match}</nowiki>" ) );
1205                 }
1206                 $wgOut->returnToMain( false );
1207         }
1208
1209         /**
1210          * @access private
1211          * @todo document
1212          */
1213         function mergeChangesInto( &$editText ){
1214                 $fname = 'EditPage::mergeChangesInto';
1215                 wfProfileIn( $fname );
1216
1217                 $db =& wfGetDB( DB_MASTER );
1218
1219                 // This is the revision the editor started from
1220                 $baseRevision = Revision::loadFromTimestamp(
1221                         $db, $this->mArticle->mTitle, $this->edittime );
1222                 if( is_null( $baseRevision ) ) {
1223                         wfProfileOut( $fname );
1224                         return false;
1225                 }
1226                 $baseText = $baseRevision->getText();
1227
1228                 // The current state, we want to merge updates into it
1229                 $currentRevision =  Revision::loadFromTitle(
1230                         $db, $this->mArticle->mTitle );
1231                 if( is_null( $currentRevision ) ) {
1232                         wfProfileOut( $fname );
1233                         return false;
1234                 }
1235                 $currentText = $currentRevision->getText();
1236
1237                 if( wfMerge( $baseText, $editText, $currentText, $result ) ){
1238                         $editText = $result;
1239                         wfProfileOut( $fname );
1240                         return true;
1241                 } else {
1242                         wfProfileOut( $fname );
1243                         return false;
1244                 }
1245         }
1246
1247         /**
1248          * Check if the browser is on a blacklist of user-agents known to
1249          * mangle UTF-8 data on form submission. Returns true if Unicode
1250          * should make it through, false if it's known to be a problem.
1251          * @return bool
1252          * @access private
1253          */
1254         function checkUnicodeCompliantBrowser() {
1255                 global $wgBrowserBlackList;
1256                 if( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
1257                         // No User-Agent header sent? Trust it by default...
1258                         return true;
1259                 }
1260                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1261                 foreach ( $wgBrowserBlackList as $browser ) {
1262                         if ( preg_match($browser, $currentbrowser) ) {
1263                                 return false;
1264                         }
1265                 }
1266                 return true;
1267         }
1268
1269         /**
1270          * Format an anchor fragment as it would appear for a given section name
1271          * @param string $text
1272          * @return string
1273          * @access private
1274          */
1275         function sectionAnchor( $text ) {
1276                 $headline = Sanitizer::decodeCharReferences( $text );
1277                 # strip out HTML
1278                 $headline = preg_replace( '/<.*?' . '>/', '', $headline );
1279                 $headline = trim( $headline );
1280                 $sectionanchor = '#' . urlencode( str_replace( ' ', '_', $headline ) );
1281                 $replacearray = array(
1282                         '%3A' => ':',
1283                         '%' => '.'
1284                 );
1285                 return str_replace(
1286                         array_keys( $replacearray ),
1287                         array_values( $replacearray ),
1288                         $sectionanchor );
1289         }
1290
1291         /**
1292          * Shows a bulletin board style toolbar for common editing functions.
1293          * It can be disabled in the user preferences.
1294          * The necessary JavaScript code can be found in style/wikibits.js.
1295          */
1296         function getEditToolbar() {
1297                 global $wgStylePath, $wgContLang, $wgJsMimeType;
1298
1299                 /**
1300                  * toolarray an array of arrays which each include the filename of
1301                  * the button image (without path), the opening tag, the closing tag,
1302                  * and optionally a sample text that is inserted between the two when no
1303                  * selection is highlighted.
1304                  * The tip text is shown when the user moves the mouse over the button.
1305                  *
1306                  * Already here are accesskeys (key), which are not used yet until someone
1307                  * can figure out a way to make them work in IE. However, we should make
1308                  * sure these keys are not defined on the edit page.
1309                  */
1310                 $toolarray=array(
1311                         array(  'image'=>'button_bold.png',
1312                                         'open'  =>      "\'\'\'",
1313                                         'close' =>      "\'\'\'",
1314                                         'sample'=>      wfMsg('bold_sample'),
1315                                         'tip'   =>      wfMsg('bold_tip'),
1316                                         'key'   =>      'B'
1317                                 ),
1318                         array(  'image'=>'button_italic.png',
1319                                         'open'  =>      "\'\'",
1320                                         'close' =>      "\'\'",
1321                                         'sample'=>      wfMsg('italic_sample'),
1322                                         'tip'   =>      wfMsg('italic_tip'),
1323                                         'key'   =>      'I'
1324                                 ),
1325                         array(  'image'=>'button_link.png',
1326                                         'open'  =>      '[[',
1327                                         'close' =>      ']]',
1328                                         'sample'=>      wfMsg('link_sample'),
1329                                         'tip'   =>      wfMsg('link_tip'),
1330                                         'key'   =>      'L'
1331                                 ),
1332                         array(  'image'=>'button_extlink.png',
1333                                         'open'  =>      '[',
1334                                         'close' =>      ']',
1335                                         'sample'=>      wfMsg('extlink_sample'),
1336                                         'tip'   =>      wfMsg('extlink_tip'),
1337                                         'key'   =>      'X'
1338                                 ),
1339                         array(  'image'=>'button_headline.png',
1340                                         'open'  =>      "\\n== ",
1341                                         'close' =>      " ==\\n",
1342                                         'sample'=>      wfMsg('headline_sample'),
1343                                         'tip'   =>      wfMsg('headline_tip'),
1344                                         'key'   =>      'H'
1345                                 ),
1346                         array(  'image'=>'button_image.png',
1347                                         'open'  =>      '[['.$wgContLang->getNsText(NS_IMAGE).":",
1348                                         'close' =>      ']]',
1349                                         'sample'=>      wfMsg('image_sample'),
1350                                         'tip'   =>      wfMsg('image_tip'),
1351                                         'key'   =>      'D'
1352                                 ),
1353                         array(  'image' =>'button_media.png',
1354                                         'open'  =>      '[['.$wgContLang->getNsText(NS_MEDIA).':',
1355                                         'close' =>      ']]',
1356                                         'sample'=>      wfMsg('media_sample'),
1357                                         'tip'   =>      wfMsg('media_tip'),
1358                                         'key'   =>      'M'
1359                                 ),
1360                         array(  'image' =>'button_math.png',
1361                                         'open'  =>      "\\<math\\>",
1362                                         'close' =>      "\\</math\\>",
1363                                         'sample'=>      wfMsg('math_sample'),
1364                                         'tip'   =>      wfMsg('math_tip'),
1365                                         'key'   =>      'C'
1366                                 ),
1367                         array(  'image' =>'button_nowiki.png',
1368                                         'open'  =>      "\\<nowiki\\>",
1369                                         'close' =>      "\\</nowiki\\>",
1370                                         'sample'=>      wfMsg('nowiki_sample'),
1371                                         'tip'   =>      wfMsg('nowiki_tip'),
1372                                         'key'   =>      'N'
1373                                 ),
1374                         array(  'image' =>'button_sig.png',
1375                                         'open'  =>      '--~~~~',
1376                                         'close' =>      '',
1377                                         'sample'=>      '',
1378                                         'tip'   =>      wfMsg('sig_tip'),
1379                                         'key'   =>      'Y'
1380                                 ),
1381                         array(  'image' =>'button_hr.png',
1382                                         'open'  =>      "\\n----\\n",
1383                                         'close' =>      '',
1384                                         'sample'=>      '',
1385                                         'tip'   =>      wfMsg('hr_tip'),
1386                                         'key'   =>      'R'
1387                                 )
1388                 );
1389                 $toolbar ="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
1390
1391                 $toolbar.="document.writeln(\"<div id='toolbar'>\");\n";
1392                 foreach($toolarray as $tool) {
1393
1394                         $image=$wgStylePath.'/common/images/'.$tool['image'];
1395                         $open=$tool['open'];
1396                         $close=$tool['close'];
1397                         $sample = wfEscapeJsString( $tool['sample'] );
1398
1399                         // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
1400                         // Older browsers show a "speedtip" type message only for ALT.
1401                         // Ideally these should be different, realistically they
1402                         // probably don't need to be.
1403                         $tip = wfEscapeJsString( $tool['tip'] );
1404
1405                         #$key = $tool["key"];
1406
1407                         $toolbar.="addButton('$image','$tip','$open','$close','$sample');\n";
1408                 }
1409
1410                 $toolbar.="document.writeln(\"</div>\");\n";
1411                 $toolbar.="/*]]>*/\n</script>";
1412                 return $toolbar;
1413         }
1414
1415         /**
1416          * Output preview text only. This can be sucked into the edit page
1417          * via JavaScript, and saves the server time rendering the skin as
1418          * well as theoretically being more robust on the client (doesn't
1419          * disturb the edit box's undo history, won't eat your text on
1420          * failure, etc).
1421          *
1422          * @todo This doesn't include category or interlanguage links.
1423          *       Would need to enhance it a bit, maybe wrap them in XML
1424          *       or something... that might also require more skin
1425          *       initialization, so check whether that's a problem.
1426          */
1427         function livePreview() {
1428                 global $wgOut;
1429                 $wgOut->disable();
1430                 header( 'Content-type: text/xml' );
1431                 header( 'Cache-control: no-cache' );
1432                 # FIXME
1433                 echo $this->getPreviewText( false, false );
1434         }
1435
1436
1437         /**
1438          * Get a diff between the current contents of the edit box and the
1439          * version of the page we're editing from.
1440          *
1441          * If this is a section edit, we'll replace the section as for final
1442          * save and then make a comparison.
1443          *
1444          * @return string HTML
1445          */
1446         function getDiff() {
1447                 global $wgUser;
1448
1449                 require_once( 'DifferenceEngine.php' );
1450                 $oldtext = $this->mArticle->fetchContent();
1451                 $newtext = $this->mArticle->replaceSection(
1452                         $this->section, $this->textbox1, $this->summary, $this->edittime );
1453                 $oldtitle = wfMsg( 'currentrev' );
1454                 $newtitle = wfMsg( 'yourtext' );
1455                 if ( $oldtext !== false  || $newtext != '' ) {
1456                         $de = new DifferenceEngine( $this->mTitle );
1457                         $de->setText( $oldtext, $newtext );
1458                         $difftext = $de->getDiff( $oldtitle, $newtitle );
1459                 } else {
1460                         $difftext = '';
1461                 }
1462
1463                 return '<div id="wikiDiff">' . $difftext . '</div>';
1464         }
1465
1466         /**
1467          * Filter an input field through a Unicode de-armoring process if it
1468          * came from an old browser with known broken Unicode editing issues.
1469          *
1470          * @param WebRequest $request
1471          * @param string $field
1472          * @return string
1473          * @access private
1474          */
1475         function safeUnicodeInput( $request, $field ) {
1476                 $text = rtrim( $request->getText( $field ) );
1477                 return $request->getBool( 'safemode' )
1478                         ? $this->unmakesafe( $text )
1479                         : $text;
1480         }
1481
1482         /**
1483          * Filter an output field through a Unicode armoring process if it is
1484          * going to an old browser with known broken Unicode editing issues.
1485          *
1486          * @param string $text
1487          * @return string
1488          * @access private
1489          */
1490         function safeUnicodeOutput( $text ) {
1491                 global $wgContLang;
1492                 $codedText = $wgContLang->recodeForEdit( $text );
1493                 return $this->checkUnicodeCompliantBrowser()
1494                         ? $codedText
1495                         : $this->makesafe( $codedText );
1496         }
1497
1498         /**
1499          * A number of web browsers are known to corrupt non-ASCII characters
1500          * in a UTF-8 text editing environment. To protect against this,
1501          * detected browsers will be served an armored version of the text,
1502          * with non-ASCII chars converted to numeric HTML character references.
1503          *
1504          * Preexisting such character references will have a 0 added to them
1505          * to ensure that round-trips do not alter the original data.
1506          *
1507          * @param string $invalue
1508          * @return string
1509          * @access private
1510          */
1511         function makesafe( $invalue ) {
1512                 // Armor existing references for reversability.
1513                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
1514
1515                 $bytesleft = 0;
1516                 $result = "";
1517                 $working = 0;
1518                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1519                         $bytevalue = ord( $invalue{$i} );
1520                         if( $bytevalue <= 0x7F ) { //0xxx xxxx
1521                                 $result .= chr( $bytevalue );
1522                                 $bytesleft = 0;
1523                         } elseif( $bytevalue <= 0xBF ) { //10xx xxxx
1524                                 $working = $working << 6;
1525                                 $working += ($bytevalue & 0x3F);
1526                                 $bytesleft--;
1527                                 if( $bytesleft <= 0 ) {
1528                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
1529                                 }
1530                         } elseif( $bytevalue <= 0xDF ) { //110x xxxx
1531                                 $working = $bytevalue & 0x1F;
1532                                 $bytesleft = 1;
1533                         } elseif( $bytevalue <= 0xEF ) { //1110 xxxx
1534                                 $working = $bytevalue & 0x0F;
1535                                 $bytesleft = 2;
1536                         } else { //1111 0xxx
1537                                 $working = $bytevalue & 0x07;
1538                                 $bytesleft = 3;
1539                         }
1540                 }
1541                 return $result;
1542         }
1543
1544         /**
1545          * Reverse the previously applied transliteration of non-ASCII characters
1546          * back to UTF-8. Used to protect data from corruption by broken web browsers
1547          * as listed in $wgBrowserBlackList.
1548          *
1549          * @param string $invalue
1550          * @return string
1551          * @access private
1552          */
1553         function unmakesafe( $invalue ) {
1554                 $result = "";
1555                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1556                         if( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
1557                                 $i += 3;
1558                                 $hexstring = "";
1559                                 do {
1560                                         $hexstring .= $invalue{$i};
1561                                         $i++;
1562                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
1563
1564                                 // Do some sanity checks. These aren't needed for reversability,
1565                                 // but should help keep the breakage down if the editor
1566                                 // breaks one of the entities whilst editing.
1567                                 if ((substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6)) {
1568                                         $codepoint = hexdec($hexstring);
1569                                         $result .= codepointToUtf8( $codepoint );
1570                                 } else {
1571                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
1572                                 }
1573                         } else {
1574                                 $result .= substr( $invalue, $i, 1 );
1575                         }
1576                 }
1577                 // reverse the transform that we made for reversability reasons.
1578                 return strtr( $result, array( "&#x0" => "&#x" ) );
1579         }
1580
1581         function noCreatePermission() {
1582                 global $wgOut;
1583                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
1584                 $wgOut->addWikiText( wfMsg( 'nocreatetext' ) );
1585         }
1586
1587 }
1588
1589 ?>