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                                 /* Fallback for live preview */
 349                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 350                                 $this->diff = $request->getCheck( 'wpDiff' );
 351
 352                                 if( !$this->preview ) {
 353                                         if ( $this->tokenOk( $request ) ) {
 354                                                 # Some browsers will not report any submit button
 355                                                 # if the user hits enter in the comment box.
 356                                                 # The unmarked state will be assumed to be a save,
 357                                                 # if the form seems otherwise complete.
 358                                                 wfDebug( "$fname: Passed token check.\n" );
 359                                         } else {
 360                                                 # Page might be a hack attempt posted from
 361                                                 # an external site. Preview instead of saving.
 362                                                 wfDebug( "$fname: Failed token check; forcing preview\n" );
 363                                                 $this->preview = true;
 364                                         }
 365                                 }
 366                         }
 367                         $this->save    = ! ( $this->preview OR $this->diff );
 368                         if( !preg_match( '/^\d{14}$/', $this->edittime )) {
 369                                 $this->edittime = null;
 370                         }
 371
 372                         if( !preg_match( '/^\d{14}$/', $this->starttime )) {
 373                                 $this->starttime = null;
 374                         }
 375
 376                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 377
 378                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 379                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 380                 } else {
 381                         # Not a posted form? Start with nothing.
 382                         wfDebug( "$fname: Not a posted form.\n" );
 383                         $this->textbox1  = '';
 384                         $this->textbox2  = '';
 385                         $this->mMetaData = '';
 386                         $this->summary   = '';
 387                         $this->edittime  = '';
 388                         $this->starttime = wfTimestampNow();
 389                         $this->preview   = false;
 390                         $this->save      = false;
 391                         $this->diff      = false;
 392                         $this->minoredit = false;
 393                         $this->watchthis = false;
 394                         $this->recreate  = false;
 395                 }
 396
 397                 $this->oldid = $request->getInt( 'oldid' );
 398
 399                 # Section edit can come from either the form or a link
 400                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 401
 402                 $this->live = $request->getCheck( 'live' );
 403                 $this->editintro = $request->getText( 'editintro' );
 404
 405                 wfProfileOut( $fname );
 406         }
 407
 408         /**
 409          * Make sure the form isn't faking a user's credentials.
 410          *
 411          * @param WebRequest $request
 412          * @return bool
 413          * @access private
 414          */
 415         function tokenOk( &$request ) {
 416                 global $wgUser;
 417                 if( $wgUser->isAnon() ) {
 418                         # Anonymous users may not have a session
 419                         # open. Don't tokenize.
 420                         $this->mTokenOk = true;
 421                 } else {
 422                         $this->mTokenOk = $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
 423                 }
 424                 return $this->mTokenOk;
 425         }
 426
 427         function showIntro() {
 428                 global $wgOut, $wgUser;
 429                 $addstandardintro=true;
 430                 if($this->editintro) {
 431                         $introtitle=Title::newFromText($this->editintro);
 432                         if(isset($introtitle) && $introtitle->userCanRead()) {
 433                                 $rev=Revision::newFromTitle($introtitle);
 434                                 if($rev) {
 435                                         $wgOut->addSecondaryWikiText($rev->getText());
 436                                         $addstandardintro=false;
 437                                 }
 438                         }
 439                 }
 440                 if($addstandardintro) {
 441                         if ( $wgUser->isLoggedIn() )
 442                                 $wgOut->addWikiText( wfMsg( 'newarticletext' ) );
 443                         else
 444                                 $wgOut->addWikiText( wfMsg( 'newarticletextanon' ) );
 445                 }
 446         }
 447
 448         /**
 449          * Attempt submission
 450          * @return bool false if output is done, true if the rest of the form should be displayed
 451          */
 452         function attemptSave() {
 453                 global $wgSpamRegex, $wgFilterCallback, $wgUser, $wgOut;
 454
 455                 $fname = 'EditPage::attemptSave';
 456                 wfProfileIn( $fname );
 457                 wfProfileIn( "$fname-checks" );
 458
 459                 # Reintegrate metadata
 460                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 461                 $this->mMetaData = '' ;
 462
 463                 # Check for spam
 464                 if ( $wgSpamRegex && preg_match( $wgSpamRegex, $this->textbox1, $matches ) ) {
 465                         $this->spamPage ( $matches[0] );
 466                         wfProfileOut( "$fname-checks" );
 467                         wfProfileOut( $fname );
 468                         return false;
 469                 }
 470                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section ) ) {
 471                         # Error messages or other handling should be performed by the filter function
 472                         wfProfileOut( $fname );
 473                         wfProfileOut( "$fname-checks" );
 474                         return false;
 475                 }
 476                 if ( !wfRunHooks( 'EditFilter', array( &$this, $this->textbox1, $this->section ) ) ) {
 477                         # Error messages or other handling should be performed by the filter function
 478                         wfProfileOut( $fname );
 479                         wfProfileOut( "$fname-checks" );
 480                         return false;
 481                 }
 482                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 483                         # Check block state against master, thus 'false'.
 484                         $this->blockedIPpage();
 485                         wfProfileOut( "$fname-checks" );
 486                         wfProfileOut( $fname );
 487                         return false;
 488                 }
 489
 490                 if ( !$wgUser->isAllowed('edit') ) {
 491                         if ( $wgUser->isAnon() ) {
 492                                 $this->userNotLoggedInPage();
 493                                 wfProfileOut( "$fname-checks" );
 494                                 wfProfileOut( $fname );
 495                                 return false;
 496                         }
 497                         else {
 498                                 $wgOut->readOnlyPage();
 499                                 wfProfileOut( "$fname-checks" );
 500                                 wfProfileOut( $fname );
 501                                 return false;
 502                         }
 503                 }
 504
 505                 if ( wfReadOnly() ) {
 506                         $wgOut->readOnlyPage();
 507                         wfProfileOut( "$fname-checks" );
 508                         wfProfileOut( $fname );
 509                         return false;
 510                 }
 511                 if ( $wgUser->pingLimiter() ) {
 512                         $wgOut->rateLimited();
 513                         wfProfileOut( "$fname-checks" );
 514                         wfProfileOut( $fname );
 515                         return false;
 516                 }
 517
 518                 # If the article has been deleted while editing, don't save it without
 519                 # confirmation
 520                 if ( $this->deletedSinceEdit && !$this->recreate ) {
 521                         wfProfileOut( "$fname-checks" );
 522                         wfProfileOut( $fname );
 523                         return true;
 524                 }
 525
 526                 wfProfileOut( "$fname-checks" );
 527
 528                 # If article is new, insert it.
 529                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 530                 if ( 0 == $aid ) {
 531                         // Late check for create permission, just in case *PARANOIA*
 532                         if ( !$this->mTitle->userCan( 'create' ) ) {
 533                                 wfDebug( "$fname: no create permission\n" );
 534                                 $this->noCreatePermission();
 535                                 wfProfileOut( $fname );
 536                                 return;
 537                         }
 538
 539                         # Don't save a new article if it's blank.
 540                         if ( ( '' == $this->textbox1 ) ) {
 541                                         $wgOut->redirect( $this->mTitle->getFullURL() );
 542                                         wfProfileOut( $fname );
 543                                         return false;
 544                         }
 545
 546                         $isComment=($this->section=='new');
 547                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 548                                 $this->minoredit, $this->watchthis, false, $isComment);
 549
 550                         wfProfileOut( $fname );
 551                         return false;
 552                 }
 553
 554                 # Article exists. Check for edit conflict.
 555
 556                 $this->mArticle->clear(); # Force reload of dates, etc.
 557                 $this->mArticle->forUpdate( true ); # Lock the article
 558
 559                 if( $this->mArticle->getTimestamp() != $this->edittime ) {
 560                         $this->isConflict = true;
 561                         if( $this->section == 'new' ) {
 562                                 if( $this->mArticle->getUserText() == $wgUser->getName() &&
 563                                         $this->mArticle->getComment() == $this->summary ) {
 564                                         // Probably a duplicate submission of a new comment.
 565                                         // This can happen when squid resends a request after
 566                                         // a timeout but the first one actually went through.
 567                                         wfDebug( "EditPage::editForm duplicate new section submission; trigger edit conflict!\n" );
 568                                 } else {
 569                                         // New comment; suppress conflict.
 570                                         $this->isConflict = false;
 571                                         wfDebug( "EditPage::editForm conflict suppressed; new section\n" );
 572                                 }
 573                         }
 574                 }
 575                 $userid = $wgUser->getID();
 576
 577                 if ( $this->isConflict) {
 578                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 579                                 $this->mArticle->getTimestamp() . "'\n" );
 580                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime);
 581                 }
 582                 else {
 583                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 584                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary);
 585                 }
 586                 if( is_null( $text ) ) {
 587                         wfDebug( "EditPage::editForm activating conflict; section replace failed.\n" );
 588                         $this->isConflict = true;
 589                         $text = $this->textbox1;
 590                 }
 591
 592                 # Suppress edit conflict with self, except for section edits where merging is required.
 593                 if ( ( $this->section == '' ) && ( 0 != $userid ) && ( $this->mArticle->getUser() == $userid ) ) {
 594                         wfDebug( "Suppressing edit conflict, same user.\n" );
 595                         $this->isConflict = false;
 596                 } else {
 597                         # switch from section editing to normal editing in edit conflict
 598                         if($this->isConflict) {
 599                                 # Attempt merge
 600                                 if( $this->mergeChangesInto( $text ) ){
 601                                         // Successful merge! Maybe we should tell the user the good news?
 602                                         $this->isConflict = false;
 603                                         wfDebug( "Suppressing edit conflict, successful merge.\n" );
 604                                 } else {
 605                                         $this->section = '';
 606                                         $this->textbox1 = $text;
 607                                         wfDebug( "Keeping edit conflict, failed merge.\n" );
 608                                 }
 609                         }
 610                 }
 611
 612                 if ( $this->isConflict ) {
 613                         wfProfileOut( $fname );
 614                         return true;
 615                 }
 616
 617                 # All's well
 618                 wfProfileIn( "$fname-sectionanchor" );
 619                 $sectionanchor = '';
 620                 if( $this->section == 'new' ) {
 621                         if( $this->summary != '' ) {
 622                                 $sectionanchor = $this->sectionAnchor( $this->summary );
 623                         }
 624                 } elseif( $this->section != '' ) {
 625                         # Try to get a section anchor from the section source, redirect to edited section if header found
 626                         # XXX: might be better to integrate this into Article::replaceSection
 627                         # for duplicate heading checking and maybe parsing
 628                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 629                         # we can't deal with anchors, includes, html etc in the header for now,
 630                         # headline would need to be parsed to improve this
 631                         if($hasmatch and strlen($matches[2]) > 0) {
 632                                 $sectionanchor = $this->sectionAnchor( $matches[2] );
 633                         }
 634                 }
 635                 wfProfileOut( "$fname-sectionanchor" );
 636
 637                 // Save errors may fall down to the edit form, but we've now
 638                 // merged the section into full text. Clear the section field
 639                 // so that later submission of conflict forms won't try to
 640                 // replace that into a duplicated mess.
 641                 $this->textbox1 = $text;
 642                 $this->section = '';
 643
 644                 # update the article here
 645                 if( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
 646                         $this->watchthis, '', $sectionanchor ) ) {
 647                         wfProfileOut( $fname );
 648                         return false;
 649                 } else {
 650                         $this->isConflict = true;
 651                 }
 652                 wfProfileOut( $fname );
 653                 return true;
 654         }
 655
 656         /**
 657          * Initialise form fields in the object
 658          * Called on the first invocation, e.g. when a user clicks an edit link
 659          */
 660         function initialiseForm() {
 661                 $this->edittime = $this->mArticle->getTimestamp();
 662                 $this->textbox1 = $this->mArticle->getContent();
 663                 $this->summary = '';
 664                 if ( !$this->mArticle->exists() && $this->mArticle->mTitle->getNamespace() == NS_MEDIAWIKI )
 665                         $this->textbox1 = wfMsgWeirdKey ( $this->mArticle->mTitle->getText() ) ;
 666                 wfProxyCheck();
 667         }
 668
 669         /**
 670          * Send the edit form and related headers to $wgOut
 671          * @param $formCallback Optional callable that takes an OutputPage
 672          *                      parameter; will be called during form output
 673          *                      near the top, for captchas and the like.
 674          */
 675         function showEditForm( $formCallback=null ) {
 676                 global $wgOut, $wgUser, $wgLang, $wgContLang;
 677
 678                 $fname = 'EditPage::showEditForm';
 679                 wfProfileIn( $fname );
 680
 681                 $sk =& $wgUser->getSkin();
 682
 683                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) ) ;
 684
 685                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 686
 687                 # Enabled article-related sidebar, toplinks, etc.
 688                 $wgOut->setArticleRelated( true );
 689
 690                 if ( $this->isConflict ) {
 691                         $s = wfMsg( 'editconflict', $this->mTitle->getPrefixedText() );
 692                         $wgOut->setPageTitle( $s );
 693                         $wgOut->addWikiText( wfMsg( 'explainconflict' ) );
 694
 695                         $this->textbox2 = $this->textbox1;
 696                         $this->textbox1 = $this->mArticle->getContent();
 697                         $this->edittime = $this->mArticle->getTimestamp();
 698                 } else {
 699
 700                         if( $this->section != '' ) {
 701                                 if( $this->section == 'new' ) {
 702                                         $s = wfMsg('editingcomment', $this->mTitle->getPrefixedText() );
 703                                 } else {
 704                                         $s = wfMsg('editingsection', $this->mTitle->getPrefixedText() );
 705                                         if( !$this->preview && !$this->diff ) {
 706                                                 preg_match( "/^(=+)(.+)\\1/mi",
 707                                                         $this->textbox1,
 708                                                         $matches );
 709                                                 if( !empty( $matches[2] ) ) {
 710                                                         $this->summary = "/* ". trim($matches[2])." */ ";
 711                                                 }
 712                                         }
 713                                 }
 714                         } else {
 715                                 $s = wfMsg( 'editing', $this->mTitle->getPrefixedText() );
 716                         }
 717                         $wgOut->setPageTitle( $s );
 718                         if ( !$this->checkUnicodeCompliantBrowser() ) {
 719                                 $wgOut->addWikiText( wfMsg( 'nonunicodebrowser') );
 720                         }
 721                         if ( isset( $this->mArticle )
 722                              && isset( $this->mArticle->mRevision )
 723                              && !$this->mArticle->mRevision->isCurrent() ) {
 724                                 $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
 725                                 $wgOut->addWikiText( wfMsg( 'editingold' ) );
 726                         }
 727                 }
 728
 729                 if( wfReadOnly() ) {
 730                         $wgOut->addWikiText( wfMsg( 'readonlywarning' ) );
 731                 } else if ( $this->isCssJsSubpage and 'preview' != $this->formtype) {
 732                         $wgOut->addWikiText( wfMsg( 'usercssjsyoucanpreview' ));
 733                 } else if( $wgUser->isAnon() && $this->formtype != 'preview' ) {
 734                         $wgOut->addWikiText( wfMsg( 'anoneditwarning' ) );
 735                 }
 736
 737                 if( $this->mTitle->isProtected( 'edit' ) ) {
 738                         if( $this->mTitle->isSemiProtected() ) {
 739                                 $notice = wfMsg( 'semiprotectedpagewarning' );
 740                                 if( wfEmptyMsg( 'semiprotectedpagewarning', $notice ) || $notice == '-' ) {
 741                                         $notice = '';
 742                                 }
 743                         } else {
 744                                 $notice = wfMsg( 'protectedpagewarning' );
 745                         }
 746                         $wgOut->addWikiText( $notice );
 747                 }
 748
 749                 $kblength = (int)(strlen( $this->textbox1 ) / 1024);
 750                 if( $kblength > 29 ) {
 751                         $wgOut->addWikiText( wfMsg( 'longpagewarning', $wgLang->formatNum( $kblength ) ) );
 752                 }
 753
 754                 $rows = $wgUser->getOption( 'rows' );
 755                 $cols = $wgUser->getOption( 'cols' );
 756
 757                 $ew = $wgUser->getOption( 'editwidth' );
 758                 if ( $ew ) $ew = " style=\"width:100%\"";
 759                 else $ew = '';
 760
 761                 $q = 'action=submit';
 762                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
 763                 $action = $this->mTitle->escapeLocalURL( $q );
 764
 765                 $summary = wfMsg('summary');
 766                 $subject = wfMsg('subject');
 767                 $minor   = wfMsg('minoredit');
 768                 $watchthis = wfMsg ('watchthis');
 769
 770                 $cancel = $sk->makeKnownLink( $this->mTitle->getPrefixedText(),
 771                                 wfMsg('cancel') );
 772                 $edithelpurl = $sk->makeInternalOrExternalUrl( wfMsg( 'edithelppage' ));
 773                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
 774                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
 775                         htmlspecialchars( wfMsg( 'newwindow' ) );
 776
 777                 global $wgRightsText;
 778                 $copywarn = "<div id=\"editpage-copywarn\">\n" .
 779                         wfMsg( $wgRightsText ? 'copyrightwarning' : 'copyrightwarning2',
 780                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
 781                                 $wgRightsText ) . "\n</div>";
 782
 783                 if( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
 784                         # prepare toolbar for edit buttons
 785                         $toolbar = $this->getEditToolbar();
 786                 } else {
 787                         $toolbar = '';
 788                 }
 789
 790                 // activate checkboxes if user wants them to be always active
 791                 if( !$this->preview && !$this->diff ) {
 792                         if( $wgUser->getOption( 'watchdefault' ) ) $this->watchthis = true;
 793                         if( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
 794
 795                         // activate checkbox also if user is already watching the page,
 796                         // require wpWatchthis to be unset so that second condition is not
 797                         // checked unnecessarily
 798                         if( !$this->watchthis && $this->mTitle->userIsWatching() ) $this->watchthis = true;
 799                 }
 800
 801                 $minoredithtml = '';
 802
 803                 if ( $wgUser->isAllowed('minoredit') ) {
 804                         $minoredithtml =
 805                                 "<input tabindex='3' type='checkbox' value='1' name='wpMinoredit'".($this->minoredit?" checked='checked'":"").
 806                                 " accesskey='".wfMsg('accesskey-minoredit')."' id='wpMinoredit' />".
 807                                 "<label for='wpMinoredit' title='".wfMsg('tooltip-minoredit')."'>{$minor}</label>";
 808                 }
 809
 810                 $watchhtml = '';
 811
 812                 if ( $wgUser->isLoggedIn() ) {
 813                         $watchhtml = "<input tabindex='4' type='checkbox' name='wpWatchthis'".
 814                                 ($this->watchthis?" checked='checked'":"").
 815                                 " accesskey=\"".htmlspecialchars(wfMsg('accesskey-watch'))."\" id='wpWatchthis'  />".
 816                                 "<label for='wpWatchthis' title=\"" .
 817                                         htmlspecialchars(wfMsg('tooltip-watch'))."\">{$watchthis}</label>";
 818                 }
 819
 820                 $checkboxhtml = $minoredithtml . $watchhtml;
 821
 822                 if ( $wgUser->getOption( 'previewontop' ) ) {
 823
 824                         if ( 'preview' == $this->formtype ) {
 825                                 $this->showPreview();
 826                         } else {
 827                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
 828                         }
 829
 830                         if ( 'diff' == $this->formtype ) {
 831                                 $wgOut->addHTML( $this->getDiff() );
 832                         }
 833                 }
 834
 835
 836                 # if this is a comment, show a subject line at the top, which is also the edit summary.
 837                 # Otherwise, show a summary field at the bottom
 838                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
 839                 if( $this->section == 'new' ) {
 840                         $commentsubject="<span id='wpSummaryLabel'><label for='wpSummary'>{$subject}:</label></span> <div class='editOptions'><input tabindex='1' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
 841                         $editsummary = '';
 842                 } else {
 843                         $commentsubject = '';
 844                         $editsummary="<span id='wpSummaryLabel'><label for='wpSummary'>{$summary}:</label></span> <div class='editOptions'><input tabindex='2' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
 845                 }
 846
 847                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
 848                 if( !$this->preview && !$this->diff ) {
 849                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
 850                 }
 851                 $templates = $this->formatTemplates();
 852
 853                 global $wgUseMetadataEdit ;
 854                 if ( $wgUseMetadataEdit ) {
 855                         $metadata = $this->mMetaData ;
 856                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
 857                         $helppage = Title::newFromText( wfMsg( "metadata_page" ) ) ;
 858                         $top = wfMsg( 'metadata', $helppage->getLocalURL() );
 859                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
 860                 }
 861                 else $metadata = "" ;
 862
 863                 $hidden = '';
 864                 $recreate = '';
 865                 if ($this->deletedSinceEdit) {
 866                         if ( 'save' != $this->formtype ) {
 867                                 $wgOut->addWikiText( wfMsg('deletedwhileediting'));
 868                         } else {
 869                                 // Hide the toolbar and edit area, use can click preview to get it back
 870                                 // Add an confirmation checkbox and explanation.
 871                                 $toolbar = '';
 872                                 $hidden = 'type="hidden" style="display:none;"';
 873                                 $recreate = $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ));
 874                                 $recreate .=
 875                                         "<br /><input tabindex='1' type='checkbox' value='1' name='wpRecreate' id='wpRecreate' />".
 876                                         "<label for='wpRecreate' title='".wfMsg('tooltip-recreate')."'>". wfMsg('recreate')."</label>";
 877                         }
 878                 }
 879
 880                 $temp = array(
 881                         'id'        => 'wpSave',
 882                         'name'      => 'wpSave',
 883                         'type'      => 'submit',
 884                         'tabindex'  => '5',
 885                         'value'     => wfMsg('savearticle'),
 886                         'accesskey' => wfMsg('accesskey-save'),
 887                         'title'     => wfMsg('tooltip-save'),
 888                 );
 889                 $buttons['save'] = wfElement('input', $temp, '');
 890                 $temp = array(
 891                         'id'        => 'wpDiff',
 892                         'name'      => 'wpDiff',
 893                         'type'      => 'submit',
 894                         'tabindex'  => '7',
 895                         'value'     => wfMsg('showdiff'),
 896                         'accesskey' => wfMsg('accesskey-diff'),
 897                         'title'     => wfMsg('tooltip-diff'),
 898                 );
 899                 $buttons['diff'] = wfElement('input', $temp, '');
 900
 901                 global $wgLivePreview;
 902                 if ( $wgLivePreview ) {
 903                         $temp = array(
 904                                 'id'        => 'wpPreview',
 905                                 'name'      => 'wpPreview',
 906                                 'type'      => 'submit',
 907                                 'tabindex'  => '6',
 908                                 'value'     => wfMsg('showpreview'),
 909                                 'accesskey' => '',
 910                                 'title'     => wfMsg('tooltip-preview'),
 911                                 'style'     => 'display: none;',
 912                         );
 913                         $buttons['preview'] = wfElement('input', $temp, '');
 914                         $temp = array(
 915                                 'id'        => 'wpLivePreview',
 916                                 'name'      => 'wpLivePreview',
 917                                 'type'      => 'submit',
 918                                 'tabindex'  => '6',
 919                                 'value'     => wfMsg('showlivepreview'),
 920                                 'accesskey' => wfMsg('accesskey-preview'),
 921                                 'title'     => '',
 922                                 'onclick'   => $this->doLivePreviewScript(),
 923                         );
 924                         $buttons['live'] = wfElement('input', $temp, '');
 925                 } else {
 926                         $temp = array(
 927                                 'id'        => 'wpPreview',
 928                                 'name'      => 'wpPreview',
 929                                 'type'      => 'submit',
 930                                 'tabindex'  => '6',
 931                                 'value'     => wfMsg('showpreview'),
 932                                 'accesskey' => wfMsg('accesskey-preview'),
 933                                 'title'     => wfMsg('tooltip-preview'),
 934                         );
 935                         $buttons['preview'] = wfElement('input', $temp, '');
 936                         $buttons['live'] = '';
 937                 }
 938
 939                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
 940                         ? ""
 941                         : "<input type='hidden' name=\"safemode\" value='1' />\n";
 942
 943                 $wgOut->addHTML( <<<END
 944 {$toolbar}
 945 <form id="editform" name="editform" method="post" action="$action"
 946 enctype="multipart/form-data">
 947 END
 948 );
 949
 950                 if( is_callable( $formCallback ) ) {
 951                         call_user_func_array( $formCallback, array( &$wgOut ) );
 952                 }
 953
 954                 // Put these up at the top to ensure they aren't lost on early form submission
 955                 $wgOut->addHTML( "
 956 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
 957 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
 958 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
 959 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
 960
 961                 $wgOut->addHTML( <<<END
 962 $recreate
 963 {$commentsubject}
 964 <textarea tabindex='1' accesskey="," name="wpTextbox1" id="wpTextbox1" rows='{$rows}'
 965 cols='{$cols}'{$ew} $hidden>
 966 END
 967 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox1 ) ) .
 968 "
 969 </textarea>
 970                 " );
 971
 972                 $wgOut->addWikiText( $copywarn );
 973                 $wgOut->addHTML( "
 974 {$metadata}
 975 {$editsummary}
 976 {$checkboxhtml}
 977 {$safemodehtml}
 978 ");
 979
 980                 $wgOut->addHTML("
 981 <div class='editButtons'>
 982         {$buttons['save']}
 983         {$buttons['preview']}
 984         {$buttons['live']}
 985         {$buttons['diff']}
 986         <span class='editHelp'>{$cancel} | {$edithelp}</span>
 987 </div><!-- editButtons -->
 988 </div><!-- editOptions -->");
 989
 990                 $wgOut->addWikiText( wfMsgForContent( 'edittools' ) );
 991
 992                 $wgOut->addHTML( "
 993 <div class='templatesUsed'>
 994 {$templates}
 995 </div>
 996 " );
 997
 998                 if ( $wgUser->isLoggedIn() ) {
 999                         /**
1000                          * To make it harder for someone to slip a user a page
1001                          * which submits an edit form to the wiki without their
1002                          * knowledge, a random token is associated with the login
1003                          * session. If it's not passed back with the submission,
1004                          * we won't save the page, or render user JavaScript and
1005                          * CSS previews.
1006                          */
1007                         $token = htmlspecialchars( $wgUser->editToken() );
1008                         $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
1009                 }
1010
1011
1012                 if ( $this->isConflict ) {
1013                         require_once( "DifferenceEngine.php" );
1014                         $wgOut->addWikiText( '==' . wfMsg( "yourdiff" ) . '==' );
1015
1016                         $de = new DifferenceEngine( $this->mTitle );
1017                         $de->setText( $this->textbox2, $this->textbox1 );
1018                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1019
1020                         $wgOut->addWikiText( '==' . wfMsg( "yourtext" ) . '==' );
1021                         $wgOut->addHTML( "<textarea tabindex=6 id='wpTextbox2' name=\"wpTextbox2\" rows='{$rows}' cols='{$cols}' wrap='virtual'>"
1022                                 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox2 ) ) . "\n</textarea>" );
1023                 }
1024                 $wgOut->addHTML( "</form>\n" );
1025                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1026
1027                         if ( $this->formtype == 'preview') {
1028                                 $this->showPreview();
1029                         } else {
1030                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
1031                         }
1032
1033                         if ( $this->formtype == 'diff') {
1034                                 $wgOut->addHTML( $this->getDiff() );
1035                         }
1036
1037                 }
1038
1039                 wfProfileOut( $fname );
1040         }
1041
1042         /**
1043          * Append preview output to $wgOut.
1044          * Includes category rendering if this is a category page.
1045          * @access private
1046          */
1047         function showPreview() {
1048                 global $wgOut;
1049                 $wgOut->addHTML( '<div id="wikiPreview">' );
1050                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1051                         $this->mArticle->openShowCategory();
1052                 }
1053                 $previewOutput = $this->getPreviewText();
1054                 $wgOut->addHTML( $previewOutput );
1055                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1056                         $this->mArticle->closeShowCategory();
1057                 }
1058                 $wgOut->addHTML( "<br style=\"clear:both;\" />\n" );
1059                 $wgOut->addHTML( '</div>' );
1060         }
1061
1062         /**
1063          * Prepare a list of templates used by this page. Returns HTML.
1064          */
1065         function formatTemplates() {
1066                 global $wgUser;
1067
1068                 $fname = 'EditPage::formatTemplates';
1069                 wfProfileIn( $fname );
1070
1071                 $sk =& $wgUser->getSkin();
1072
1073                 $outText = '';
1074                 $templates = $this->mArticle->getUsedTemplates();
1075                 if ( count( $templates ) > 0 ) {
1076                         # Do a batch existence check
1077                         $batch = new LinkBatch;
1078                         foreach( $templates as $title ) {
1079                                 $batch->addObj( $title );
1080                         }
1081                         $batch->execute();
1082
1083                         # Construct the HTML
1084                         $outText = '<br />'. wfMsg( 'templatesused' ) . '<ul>';
1085                         foreach ( $templates as $titleObj ) {
1086                                 $outText .= '<li>' . $sk->makeLinkObj( $titleObj ) . '</li>';
1087                         }
1088                         $outText .= '</ul>';
1089                 }
1090                 wfProfileOut( $fname );
1091                 return $outText;
1092         }
1093
1094         /**
1095          * Live Preview lets us fetch rendered preview page content and
1096          * add it to the page without refreshing the whole page.
1097          * If not supported by the browser it will fall through to the normal form
1098          * submission method.
1099          *
1100          * This function outputs a script tag to support live preview, and
1101          * returns an onclick handler which should be added to the attributes
1102          * of the preview button
1103          */
1104         function doLivePreviewScript() {
1105                 global $wgStylePath, $wgJsMimeType, $wgOut, $wgTitle;
1106                 $wgOut->addHTML( '<script type="'.$wgJsMimeType.'" src="' .
1107                         htmlspecialchars( $wgStylePath . '/common/preview.js' ) .
1108                         '"></script>' . "\n" );
1109                 $liveAction = $wgTitle->getLocalUrl( 'action=submit&wpPreview=true&live=true' );
1110                 return "return !livePreview(" .
1111                         "getElementById('wikiPreview')," .
1112                         "editform.wpTextbox1.value," .
1113                         '"' . $liveAction . '"' . ")";
1114         }
1115
1116         function getLastDelete() {
1117                 $dbr =& wfGetDB( DB_SLAVE );
1118                 $fname = 'EditPage::getLastDelete';
1119                 $res = $dbr->select(
1120                         array( 'logging', 'user' ),
1121                         array( 'log_type',
1122                                'log_action',
1123                                'log_timestamp',
1124                                'log_user',
1125                                'log_namespace',
1126                                'log_title',
1127                                'log_comment',
1128                                'log_params',
1129                                'user_name', ),
1130                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1131                                'log_title' => $this->mTitle->getDBkey(),
1132                                'log_type' => 'delete',
1133                                'log_action' => 'delete',
1134                                'user_id=log_user' ),
1135                         $fname,
1136                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
1137
1138                 if($dbr->numRows($res) == 1) {
1139                         while ( $x = $dbr->fetchObject ( $res ) )
1140                                 $data = $x;
1141                         $dbr->freeResult ( $res ) ;
1142                 } else {
1143                         $data = null;
1144                 }
1145                 return $data;
1146         }
1147
1148         /**
1149          * @todo document
1150          */
1151         function getPreviewText() {
1152                 global $wgOut, $wgUser, $wgTitle, $wgParser;
1153
1154                 $fname = 'EditPage::getPreviewText';
1155                 wfProfileIn( $fname );
1156
1157                 if ( $this->mTokenOk ) {
1158                         $msg = 'previewnote';
1159                 } else {
1160                         $msg = 'session_fail_preview';
1161                 }
1162                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
1163                         "<div class='previewnote'>" . $wgOut->parse( wfMsg( $msg ) ) . "</div>\n";
1164                 if ( $this->isConflict ) {
1165                         $previewhead.='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1166                 }
1167
1168                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1169                 $parserOptions->setEditSection( false );
1170
1171                 # don't parse user css/js, show message about preview
1172                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1173
1174                 if ( $this->isCssJsSubpage ) {
1175                         if(preg_match("/\\.css$/", $wgTitle->getText() ) ) {
1176                                 $previewtext = wfMsg('usercsspreview');
1177                         } else if(preg_match("/\\.js$/", $wgTitle->getText() ) ) {
1178                                 $previewtext = wfMsg('userjspreview');
1179                         }
1180                         $parserOptions->setTidy(true);
1181                         $parserOutput = $wgParser->parse( $previewtext , $wgTitle, $parserOptions );
1182                         $wgOut->addHTML( $parserOutput->mText );
1183                         wfProfileOut( $fname );
1184                         return $previewhead;
1185                 } else {
1186                         # if user want to see preview when he edit an article
1187                         if( $wgUser->getOption('previewonfirst') and ($this->textbox1 == '')) {
1188                                 $this->textbox1 = $this->mArticle->getContent();
1189                         }
1190
1191                         $toparse = $this->textbox1;
1192
1193                         # If we're adding a comment, we need to show the
1194                         # summary as the headline
1195                         if($this->section=="new" && $this->summary!="") {
1196                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1197                         }
1198
1199                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData ;
1200                         $parserOptions->setTidy(true);
1201                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ) ."\n\n",
1202                                         $wgTitle, $parserOptions );
1203
1204                         $previewHTML = $parserOutput->getText();
1205                         $wgOut->addParserOutputNoText( $parserOutput );
1206
1207                         wfProfileOut( $fname );
1208                         return $previewhead . $previewHTML;
1209                 }
1210         }
1211
1212         /**
1213          * @todo document
1214          */
1215         function blockedIPpage() {
1216                 global $wgOut;
1217                 $wgOut->blockedPage();
1218         }
1219
1220         /**
1221          * @todo document
1222          */
1223         function userNotLoggedInPage() {
1224                 global $wgOut;
1225
1226                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1227                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1228                 $wgOut->setArticleRelated( false );
1229
1230                 $wgOut->addWikiText( wfMsg( 'whitelistedittext' ) );
1231                 $wgOut->returnToMain( false );
1232         }
1233
1234         /**
1235          * Creates a basic error page which informs the user that
1236          * they have to validate their email address before being
1237          * allowed to edit.
1238          */
1239         function userNotConfirmedPage() {
1240
1241                 global $wgOut;
1242
1243                 $wgOut->setPageTitle( wfMsg( 'confirmedittitle' ) );
1244                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1245                 $wgOut->setArticleRelated( false );
1246                 $wgOut->addWikiText( wfMsg( 'confirmedittext' ) );
1247                 $wgOut->returnToMain( false );
1248         }
1249
1250         /**
1251          * @todo document
1252          */
1253         function spamPage ( $match = false )
1254         {
1255                 global $wgOut;
1256                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1257                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1258                 $wgOut->setArticleRelated( false );
1259
1260                 $wgOut->addWikiText( wfMsg( 'spamprotectiontext' ) );
1261                 if ( $match ) {
1262                         $wgOut->addWikiText( wfMsg( 'spamprotectionmatch', "<nowiki>{$match}</nowiki>" ) );
1263                 }
1264                 $wgOut->returnToMain( false );
1265         }
1266
1267         /**
1268          * @access private
1269          * @todo document
1270          */
1271         function mergeChangesInto( &$editText ){
1272                 $fname = 'EditPage::mergeChangesInto';
1273                 wfProfileIn( $fname );
1274
1275                 $db =& wfGetDB( DB_MASTER );
1276
1277                 // This is the revision the editor started from
1278                 $baseRevision = Revision::loadFromTimestamp(
1279                         $db, $this->mArticle->mTitle, $this->edittime );
1280                 if( is_null( $baseRevision ) ) {
1281                         wfProfileOut( $fname );
1282                         return false;
1283                 }
1284                 $baseText = $baseRevision->getText();
1285
1286                 // The current state, we want to merge updates into it
1287                 $currentRevision =  Revision::loadFromTitle(
1288                         $db, $this->mArticle->mTitle );
1289                 if( is_null( $currentRevision ) ) {
1290                         wfProfileOut( $fname );
1291                         return false;
1292                 }
1293                 $currentText = $currentRevision->getText();
1294
1295                 if( wfMerge( $baseText, $editText, $currentText, $result ) ){
1296                         $editText = $result;
1297                         wfProfileOut( $fname );
1298                         return true;
1299                 } else {
1300                         wfProfileOut( $fname );
1301                         return false;
1302                 }
1303         }
1304
1305         /**
1306          * Check if the browser is on a blacklist of user-agents known to
1307          * mangle UTF-8 data on form submission. Returns true if Unicode
1308          * should make it through, false if it's known to be a problem.
1309          * @return bool
1310          * @access private
1311          */
1312         function checkUnicodeCompliantBrowser() {
1313                 global $wgBrowserBlackList;
1314                 if( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
1315                         // No User-Agent header sent? Trust it by default...
1316                         return true;
1317                 }
1318                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1319                 foreach ( $wgBrowserBlackList as $browser ) {
1320                         if ( preg_match($browser, $currentbrowser) ) {
1321                                 return false;
1322                         }
1323                 }
1324                 return true;
1325         }
1326
1327         /**
1328          * Format an anchor fragment as it would appear for a given section name
1329          * @param string $text
1330          * @return string
1331          * @access private
1332          */
1333         function sectionAnchor( $text ) {
1334                 $headline = Sanitizer::decodeCharReferences( $text );
1335                 # strip out HTML
1336                 $headline = preg_replace( '/<.*?' . '>/', '', $headline );
1337                 $headline = trim( $headline );
1338                 $sectionanchor = '#' . urlencode( str_replace( ' ', '_', $headline ) );
1339                 $replacearray = array(
1340                         '%3A' => ':',
1341                         '%' => '.'
1342                 );
1343                 return str_replace(
1344                         array_keys( $replacearray ),
1345                         array_values( $replacearray ),
1346                         $sectionanchor );
1347         }
1348
1349         /**
1350          * Shows a bulletin board style toolbar for common editing functions.
1351          * It can be disabled in the user preferences.
1352          * The necessary JavaScript code can be found in style/wikibits.js.
1353          */
1354         function getEditToolbar() {
1355                 global $wgStylePath, $wgContLang, $wgJsMimeType;
1356
1357                 /**
1358                  * toolarray an array of arrays which each include the filename of
1359                  * the button image (without path), the opening tag, the closing tag,
1360                  * and optionally a sample text that is inserted between the two when no
1361                  * selection is highlighted.
1362                  * The tip text is shown when the user moves the mouse over the button.
1363                  *
1364                  * Already here are accesskeys (key), which are not used yet until someone
1365                  * can figure out a way to make them work in IE. However, we should make
1366                  * sure these keys are not defined on the edit page.
1367                  */
1368                 $toolarray=array(
1369                         array(  'image'=>'button_bold.png',
1370                                         'open'  =>      "\'\'\'",
1371                                         'close' =>      "\'\'\'",
1372                                         'sample'=>      wfMsg('bold_sample'),
1373                                         'tip'   =>      wfMsg('bold_tip'),
1374                                         'key'   =>      'B'
1375                                 ),
1376                         array(  'image'=>'button_italic.png',
1377                                         'open'  =>      "\'\'",
1378                                         'close' =>      "\'\'",
1379                                         'sample'=>      wfMsg('italic_sample'),
1380                                         'tip'   =>      wfMsg('italic_tip'),
1381                                         'key'   =>      'I'
1382                                 ),
1383                         array(  'image'=>'button_link.png',
1384                                         'open'  =>      '[[',
1385                                         'close' =>      ']]',
1386                                         'sample'=>      wfMsg('link_sample'),
1387                                         'tip'   =>      wfMsg('link_tip'),
1388                                         'key'   =>      'L'
1389                                 ),
1390                         array(  'image'=>'button_extlink.png',
1391                                         'open'  =>      '[',
1392                                         'close' =>      ']',
1393                                         'sample'=>      wfMsg('extlink_sample'),
1394                                         'tip'   =>      wfMsg('extlink_tip'),
1395                                         'key'   =>      'X'
1396                                 ),
1397                         array(  'image'=>'button_headline.png',
1398                                         'open'  =>      "\\n== ",
1399                                         'close' =>      " ==\\n",
1400                                         'sample'=>      wfMsg('headline_sample'),
1401                                         'tip'   =>      wfMsg('headline_tip'),
1402                                         'key'   =>      'H'
1403                                 ),
1404                         array(  'image'=>'button_image.png',
1405                                         'open'  =>      '[['.$wgContLang->getNsText(NS_IMAGE).":",
1406                                         'close' =>      ']]',
1407                                         'sample'=>      wfMsg('image_sample'),
1408                                         'tip'   =>      wfMsg('image_tip'),
1409                                         'key'   =>      'D'
1410                                 ),
1411                         array(  'image' =>'button_media.png',
1412                                         'open'  =>      '[['.$wgContLang->getNsText(NS_MEDIA).':',
1413                                         'close' =>      ']]',
1414                                         'sample'=>      wfMsg('media_sample'),
1415                                         'tip'   =>      wfMsg('media_tip'),
1416                                         'key'   =>      'M'
1417                                 ),
1418                         array(  'image' =>'button_math.png',
1419                                         'open'  =>      "\\<math\\>",
1420                                         'close' =>      "\\</math\\>",
1421                                         'sample'=>      wfMsg('math_sample'),
1422                                         'tip'   =>      wfMsg('math_tip'),
1423                                         'key'   =>      'C'
1424                                 ),
1425                         array(  'image' =>'button_nowiki.png',
1426                                         'open'  =>      "\\<nowiki\\>",
1427                                         'close' =>      "\\</nowiki\\>",
1428                                         'sample'=>      wfMsg('nowiki_sample'),
1429                                         'tip'   =>      wfMsg('nowiki_tip'),
1430                                         'key'   =>      'N'
1431                                 ),
1432                         array(  'image' =>'button_sig.png',
1433                                         'open'  =>      '--~~~~',
1434                                         'close' =>      '',
1435                                         'sample'=>      '',
1436                                         'tip'   =>      wfMsg('sig_tip'),
1437                                         'key'   =>      'Y'
1438                                 ),
1439                         array(  'image' =>'button_hr.png',
1440                                         'open'  =>      "\\n----\\n",
1441                                         'close' =>      '',
1442                                         'sample'=>      '',
1443                                         'tip'   =>      wfMsg('hr_tip'),
1444                                         'key'   =>      'R'
1445                                 )
1446                 );
1447                 $toolbar ="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
1448
1449                 $toolbar.="document.writeln(\"<div id='toolbar'>\");\n";
1450                 foreach($toolarray as $tool) {
1451
1452                         $image=$wgStylePath.'/common/images/'.$tool['image'];
1453                         $open=$tool['open'];
1454                         $close=$tool['close'];
1455                         $sample = wfEscapeJsString( $tool['sample'] );
1456
1457                         // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
1458                         // Older browsers show a "speedtip" type message only for ALT.
1459                         // Ideally these should be different, realistically they
1460                         // probably don't need to be.
1461                         $tip = wfEscapeJsString( $tool['tip'] );
1462
1463                         #$key = $tool["key"];
1464
1465                         $toolbar.="addButton('$image','$tip','$open','$close','$sample');\n";
1466                 }
1467
1468                 $toolbar.="document.writeln(\"</div>\");\n";
1469                 $toolbar.="/*]]>*/\n</script>";
1470                 return $toolbar;
1471         }
1472
1473         /**
1474          * Output preview text only. This can be sucked into the edit page
1475          * via JavaScript, and saves the server time rendering the skin as
1476          * well as theoretically being more robust on the client (doesn't
1477          * disturb the edit box's undo history, won't eat your text on
1478          * failure, etc).
1479          *
1480          * @todo This doesn't include category or interlanguage links.
1481          *       Would need to enhance it a bit, maybe wrap them in XML
1482          *       or something... that might also require more skin
1483          *       initialization, so check whether that's a problem.
1484          */
1485         function livePreview() {
1486                 global $wgOut;
1487                 $wgOut->disable();
1488                 header( 'Content-type: text/xml' );
1489                 header( 'Cache-control: no-cache' );
1490                 # FIXME
1491                 echo $this->getPreviewText( );
1492                 /* To not shake screen up and down between preview and live-preview */
1493                 echo "<br style=\"clear:both;\" />\n";
1494         }
1495
1496
1497         /**
1498          * Get a diff between the current contents of the edit box and the
1499          * version of the page we're editing from.
1500          *
1501          * If this is a section edit, we'll replace the section as for final
1502          * save and then make a comparison.
1503          *
1504          * @return string HTML
1505          */
1506         function getDiff() {
1507                 global $wgUser;
1508
1509                 require_once( 'DifferenceEngine.php' );
1510                 $oldtext = $this->mArticle->fetchContent();
1511                 $newtext = $this->mArticle->replaceSection(
1512                         $this->section, $this->textbox1, $this->summary, $this->edittime );
1513                 $oldtitle = wfMsg( 'currentrev' );
1514                 $newtitle = wfMsg( 'yourtext' );
1515                 if ( $oldtext !== false  || $newtext != '' ) {
1516                         $de = new DifferenceEngine( $this->mTitle );
1517                         $de->setText( $oldtext, $newtext );
1518                         $difftext = $de->getDiff( $oldtitle, $newtitle );
1519                 } else {
1520                         $difftext = '';
1521                 }
1522
1523                 return '<div id="wikiDiff">' . $difftext . '</div>';
1524         }
1525
1526         /**
1527          * Filter an input field through a Unicode de-armoring process if it
1528          * came from an old browser with known broken Unicode editing issues.
1529          *
1530          * @param WebRequest $request
1531          * @param string $field
1532          * @return string
1533          * @access private
1534          */
1535         function safeUnicodeInput( $request, $field ) {
1536                 $text = rtrim( $request->getText( $field ) );
1537                 return $request->getBool( 'safemode' )
1538                         ? $this->unmakesafe( $text )
1539                         : $text;
1540         }
1541
1542         /**
1543          * Filter an output field through a Unicode armoring process if it is
1544          * going to an old browser with known broken Unicode editing issues.
1545          *
1546          * @param string $text
1547          * @return string
1548          * @access private
1549          */
1550         function safeUnicodeOutput( $text ) {
1551                 global $wgContLang;
1552                 $codedText = $wgContLang->recodeForEdit( $text );
1553                 return $this->checkUnicodeCompliantBrowser()
1554                         ? $codedText
1555                         : $this->makesafe( $codedText );
1556         }
1557
1558         /**
1559          * A number of web browsers are known to corrupt non-ASCII characters
1560          * in a UTF-8 text editing environment. To protect against this,
1561          * detected browsers will be served an armored version of the text,
1562          * with non-ASCII chars converted to numeric HTML character references.
1563          *
1564          * Preexisting such character references will have a 0 added to them
1565          * to ensure that round-trips do not alter the original data.
1566          *
1567          * @param string $invalue
1568          * @return string
1569          * @access private
1570          */
1571         function makesafe( $invalue ) {
1572                 // Armor existing references for reversability.
1573                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
1574
1575                 $bytesleft = 0;
1576                 $result = "";
1577                 $working = 0;
1578                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1579                         $bytevalue = ord( $invalue{$i} );
1580                         if( $bytevalue <= 0x7F ) { //0xxx xxxx
1581                                 $result .= chr( $bytevalue );
1582                                 $bytesleft = 0;
1583                         } elseif( $bytevalue <= 0xBF ) { //10xx xxxx
1584                                 $working = $working << 6;
1585                                 $working += ($bytevalue & 0x3F);
1586                                 $bytesleft--;
1587                                 if( $bytesleft <= 0 ) {
1588                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
1589                                 }
1590                         } elseif( $bytevalue <= 0xDF ) { //110x xxxx
1591                                 $working = $bytevalue & 0x1F;
1592                                 $bytesleft = 1;
1593                         } elseif( $bytevalue <= 0xEF ) { //1110 xxxx
1594                                 $working = $bytevalue & 0x0F;
1595                                 $bytesleft = 2;
1596                         } else { //1111 0xxx
1597                                 $working = $bytevalue & 0x07;
1598                                 $bytesleft = 3;
1599                         }
1600                 }
1601                 return $result;
1602         }
1603
1604         /**
1605          * Reverse the previously applied transliteration of non-ASCII characters
1606          * back to UTF-8. Used to protect data from corruption by broken web browsers
1607          * as listed in $wgBrowserBlackList.
1608          *
1609          * @param string $invalue
1610          * @return string
1611          * @access private
1612          */
1613         function unmakesafe( $invalue ) {
1614                 $result = "";
1615                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1616                         if( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
1617                                 $i += 3;
1618                                 $hexstring = "";
1619                                 do {
1620                                         $hexstring .= $invalue{$i};
1621                                         $i++;
1622                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
1623
1624                                 // Do some sanity checks. These aren't needed for reversability,
1625                                 // but should help keep the breakage down if the editor
1626                                 // breaks one of the entities whilst editing.
1627                                 if ((substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6)) {
1628                                         $codepoint = hexdec($hexstring);
1629                                         $result .= codepointToUtf8( $codepoint );
1630                                 } else {
1631                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
1632                                 }
1633                         } else {
1634                                 $result .= substr( $invalue, $i, 1 );
1635                         }
1636                 }
1637                 // reverse the transform that we made for reversability reasons.
1638                 return strtr( $result, array( "&#x0" => "&#x" ) );
1639         }
1640
1641         function noCreatePermission() {
1642                 global $wgOut;
1643                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
1644                 $wgOut->addWikiText( wfMsg( 'nocreatetext' ) );
1645         }
1646
1647 }
1648
1649 ?>