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         var $tooBig = false;
  28         var $kblength = false;
  29         var $missingComment = false;
  30
  31         # Form values
  32         var $save = false, $preview = false, $diff = false;
  33         var $minoredit = false, $watchthis = false, $recreate = false;
  34         var $textbox1 = '', $textbox2 = '', $summary = '';
  35         var $edittime = '', $section = '', $starttime = '';
  36         var $oldid = 0, $editintro = '', $scrolltop = null;
  37
  38         /**
  39          * @todo document
  40          * @param $article
  41          */
  42         function EditPage( $article ) {
  43                 $this->mArticle =& $article;
  44                 global $wgTitle;
  45                 $this->mTitle =& $wgTitle;
  46         }
  47
  48         /**
  49          * This is the function that extracts metadata from the article body on the first view.
  50          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
  51          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
  52          */
  53         function extractMetaDataFromArticle () {
  54                 global $wgUseMetadataEdit , $wgMetadataWhitelist , $wgLang ;
  55                 $this->mMetaData = '' ;
  56                 if ( !$wgUseMetadataEdit ) return ;
  57                 if ( $wgMetadataWhitelist == '' ) return ;
  58                 $s = '' ;
  59                 $t = $this->mArticle->getContent();
  60
  61                 # MISSING : <nowiki> filtering
  62
  63                 # Categories and language links
  64                 $t = explode ( "\n" , $t ) ;
  65                 $catlow = strtolower ( $wgLang->getNsText ( NS_CATEGORY ) ) ;
  66                 $cat = $ll = array() ;
  67                 foreach ( $t AS $key => $x )
  68                 {
  69                         $y = trim ( strtolower ( $x ) ) ;
  70                         while ( substr ( $y , 0 , 2 ) == '[[' )
  71                         {
  72                                 $y = explode ( ']]' , trim ( $x ) ) ;
  73                                 $first = array_shift ( $y ) ;
  74                                 $first = explode ( ':' , $first ) ;
  75                                 $ns = array_shift ( $first ) ;
  76                                 $ns = trim ( str_replace ( '[' , '' , $ns ) ) ;
  77                                 if ( strlen ( $ns ) == 2 OR strtolower ( $ns ) == $catlow )
  78                                 {
  79                                         $add = '[[' . $ns . ':' . implode ( ':' , $first ) . ']]' ;
  80                                         if ( strtolower ( $ns ) == $catlow ) $cat[] = $add ;
  81                                         else $ll[] = $add ;
  82                                         $x = implode ( ']]' , $y ) ;
  83                                         $t[$key] = $x ;
  84                                         $y = trim ( strtolower ( $x ) ) ;
  85                                 }
  86                         }
  87                 }
  88                 if ( count ( $cat ) ) $s .= implode ( ' ' , $cat ) . "\n" ;
  89                 if ( count ( $ll ) ) $s .= implode ( ' ' , $ll ) . "\n" ;
  90                 $t = implode ( "\n" , $t ) ;
  91
  92                 # Load whitelist
  93                 $sat = array () ; # stand-alone-templates; must be lowercase
  94                 $wl_title = Title::newFromText ( $wgMetadataWhitelist ) ;
  95                 $wl_article = new Article ( $wl_title ) ;
  96                 $wl = explode ( "\n" , $wl_article->getContent() ) ;
  97                 foreach ( $wl AS $x )
  98                 {
  99                         $isentry = false ;
 100                         $x = trim ( $x ) ;
 101                         while ( substr ( $x , 0 , 1 ) == '*' )
 102                         {
 103                                 $isentry = true ;
 104                                 $x = trim ( substr ( $x , 1 ) ) ;
 105                         }
 106                         if ( $isentry )
 107                         {
 108                                 $sat[] = strtolower ( $x ) ;
 109                         }
 110
 111                 }
 112
 113                 # Templates, but only some
 114                 $t = explode ( '{{' , $t ) ;
 115                 $tl = array () ;
 116                 foreach ( $t AS $key => $x )
 117                 {
 118                         $y = explode ( '}}' , $x , 2 ) ;
 119                         if ( count ( $y ) == 2 )
 120                         {
 121                                 $z = $y[0] ;
 122                                 $z = explode ( '|' , $z ) ;
 123                                 $tn = array_shift ( $z ) ;
 124                                 if ( in_array ( strtolower ( $tn ) , $sat ) )
 125                                 {
 126                                         $tl[] = '{{' . $y[0] . '}}' ;
 127                                         $t[$key] = $y[1] ;
 128                                         $y = explode ( '}}' , $y[1] , 2 ) ;
 129                                 }
 130                                 else $t[$key] = '{{' . $x ;
 131                         }
 132                         else if ( $key != 0 ) $t[$key] = '{{' . $x ;
 133                         else $t[$key] = $x ;
 134                 }
 135                 if ( count ( $tl ) ) $s .= implode ( ' ' , $tl ) ;
 136                 $t = implode ( '' , $t ) ;
 137
 138                 $t = str_replace ( "\n\n\n" , "\n" , $t ) ;
 139                 $this->mArticle->mContent = $t ;
 140                 $this->mMetaData = $s ;
 141         }
 142
 143         function submit() {
 144                 $this->edit();
 145         }
 146
 147         /**
 148          * This is the function that gets called for "action=edit". It
 149          * sets up various member variables, then passes execution to
 150          * another function, usually showEditForm()
 151          *
 152          * The edit form is self-submitting, so that when things like
 153          * preview and edit conflicts occur, we get the same form back
 154          * with the extra stuff added.  Only when the final submission
 155          * is made and all is well do we actually save and redirect to
 156          * the newly-edited page.
 157          */
 158         function edit() {
 159                 global $wgOut, $wgUser, $wgRequest, $wgTitle;
 160                 global $wgEmailConfirmToEdit;
 161
 162                 if ( ! wfRunHooks( 'AlternateEdit', array( &$this  ) ) )
 163                         return;
 164
 165                 $fname = 'EditPage::edit';
 166                 wfProfileIn( $fname );
 167                 wfDebug( "$fname: enter\n" );
 168
 169                 // this is not an article
 170                 $wgOut->setArticleFlag(false);
 171
 172                 $this->importFormData( $wgRequest );
 173                 $this->firsttime = false;
 174
 175                 if( $this->live ) {
 176                         $this->livePreview();
 177                         wfProfileOut( $fname );
 178                         return;
 179                 }
 180
 181                 if ( ! $this->mTitle->userCanEdit() ) {
 182                         wfDebug( "$fname: user can't edit\n" );
 183                         $wgOut->readOnlyPage( $this->mArticle->getContent(), true );
 184                         wfProfileOut( $fname );
 185                         return;
 186                 }
 187                 wfDebug( "$fname: Checking blocks\n" );
 188                 if ( !$this->preview && !$this->diff && $wgUser->isBlockedFrom( $this->mTitle, !$this->save ) ) {
 189                         # When previewing, don't check blocked state - will get caught at save time.
 190                         # Also, check when starting edition is done against slave to improve performance.
 191                         wfDebug( "$fname: user is blocked\n" );
 192                         $wgOut->blockedPage();
 193                         wfProfileOut( $fname );
 194                         return;
 195                 }
 196                 if ( !$wgUser->isAllowed('edit') ) {
 197                         if ( $wgUser->isAnon() ) {
 198                                 wfDebug( "$fname: user must log in\n" );
 199                                 $this->userNotLoggedInPage();
 200                                 wfProfileOut( $fname );
 201                                 return;
 202                         } else {
 203                                 wfDebug( "$fname: read-only page\n" );
 204                                 $wgOut->readOnlyPage( $this->mArticle->getContent(), true );
 205                                 wfProfileOut( $fname );
 206                                 return;
 207                         }
 208                 }
 209                 if ($wgEmailConfirmToEdit && !$wgUser->isEmailConfirmed()) {
 210                         wfDebug("$fname: user must confirm e-mail address\n");
 211                         $this->userNotConfirmedPage();
 212                         wfProfileOut($fname);
 213                         return;
 214                 }
 215                 if ( !$this->mTitle->userCan( 'create' ) && !$this->mTitle->exists() ) {
 216                         wfDebug( "$fname: no create permission\n" );
 217                         $this->noCreatePermission();
 218                         wfProfileOut( $fname );
 219                         return;
 220                 }
 221                 if ( wfReadOnly() ) {
 222                         wfDebug( "$fname: read-only mode is engaged\n" );
 223                         if( $this->save || $this->preview ) {
 224                                 $this->formtype = 'preview';
 225                         } else if ( $this->diff ) {
 226                                 $this->formtype = 'diff';
 227                         } else {
 228                                 $wgOut->readOnlyPage( $this->mArticle->getContent() );
 229                                 wfProfileOut( $fname );
 230                                 return;
 231                         }
 232                 } else {
 233                         if ( $this->save ) {
 234                                 $this->formtype = 'save';
 235                         } else if ( $this->preview ) {
 236                                 $this->formtype = 'preview';
 237                         } else if ( $this->diff ) {
 238                                 $this->formtype = 'diff';
 239                         } else { # First time through
 240                                 $this->firsttime = true;
 241                                 if( $this->previewOnOpen() ) {
 242                                         $this->formtype = 'preview';
 243                                 } else {
 244                                         $this->extractMetaDataFromArticle () ;
 245                                         $this->formtype = 'initial';
 246                                 }
 247                         }
 248                 }
 249
 250                 wfProfileIn( "$fname-business-end" );
 251
 252                 $this->isConflict = false;
 253                 // css / js subpages of user pages get a special treatment
 254                 $this->isCssJsSubpage      = $wgTitle->isCssJsSubpage();
 255                 $this->isValidCssJsSubpage = $wgTitle->isValidCssJsSubpage();
 256
 257                 /* Notice that we can't use isDeleted, because it returns true if article is ever deleted
 258                  * no matter it's current state
 259                  */
 260                 $this->deletedSinceEdit = false;
 261                 if ( $this->edittime != '' ) {
 262                         /* Note that we rely on logging table, which hasn't been always there,
 263                          * but that doesn't matter, because this only applies to brand new
 264                          * deletes. This is done on every preview and save request. Move it further down
 265                          * to only perform it on saves
 266                          */
 267                         if ( $this->mTitle->isDeleted() ) {
 268                                 $this->lastDelete = $this->getLastDelete();
 269                                 if ( !is_null($this->lastDelete) ) {
 270                                         $deletetime = $this->lastDelete->log_timestamp;
 271                                         if ( ($deletetime - $this->starttime) > 0 ) {
 272                                                 $this->deletedSinceEdit = true;
 273                                         }
 274                                 }
 275                         }
 276                 }
 277
 278                 if(!$this->mTitle->getArticleID() && ('initial' == $this->formtype || $this->firsttime )) { # new article
 279                         $this->showIntro();
 280                 }
 281                 if( $this->mTitle->isTalkPage() ) {
 282                         $wgOut->addWikiText( wfMsg( 'talkpagetext' ) );
 283                 }
 284
 285                 # Attempt submission here.  This will check for edit conflicts,
 286                 # and redundantly check for locked database, blocked IPs, etc.
 287                 # that edit() already checked just in case someone tries to sneak
 288                 # in the back door with a hand-edited submission URL.
 289
 290                 if ( 'save' == $this->formtype ) {
 291                         if ( !$this->attemptSave() ) {
 292                                 wfProfileOut( "$fname-business-end" );
 293                                 wfProfileOut( $fname );
 294                                 return;
 295                         }
 296                 }
 297
 298                 # First time through: get contents, set time for conflict
 299                 # checking, etc.
 300                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 301                         $this->initialiseForm();
 302                 }
 303
 304                 $this->showEditForm();
 305                 wfProfileOut( "$fname-business-end" );
 306                 wfProfileOut( $fname );
 307         }
 308
 309         /**
 310          * Return true if this page should be previewed when the edit form
 311          * is initially opened.
 312          * @return bool
 313          * @access private
 314          */
 315         function previewOnOpen() {
 316                 global $wgUser;
 317                 return $this->section != 'new' &&
 318                         ( ( $wgUser->getOption( 'previewonfirst' ) && $this->mTitle->exists() ) ||
 319                                 ( $this->mTitle->getNamespace() == NS_CATEGORY &&
 320                                         !$this->mTitle->exists() ) );
 321         }
 322
 323         /**
 324          * @todo document
 325          */
 326         function importFormData( &$request ) {
 327                 global $wgLang ;
 328                 $fname = 'EditPage::importFormData';
 329                 wfProfileIn( $fname );
 330
 331                 if( $request->wasPosted() ) {
 332                         # These fields need to be checked for encoding.
 333                         # Also remove trailing whitespace, but don't remove _initial_
 334                         # whitespace from the text boxes. This may be significant formatting.
 335                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 336                         $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
 337                         $this->mMetaData = rtrim( $request->getText( 'metadata'   ) );
 338                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 339                         $this->summary   = $wgLang->truncate( $request->getText( 'wpSummary'  ), 250 );
 340
 341                         $this->edittime = $request->getVal( 'wpEdittime' );
 342                         $this->starttime = $request->getVal( 'wpStarttime' );
 343
 344                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 345
 346                         if( is_null( $this->edittime ) ) {
 347                                 # If the form is incomplete, force to preview.
 348                                 wfDebug( "$fname: Form data appears to be incomplete\n" );
 349                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 350                                 $this->preview  = true;
 351                         } else {
 352                                 /* Fallback for live preview */
 353                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 354                                 $this->diff = $request->getCheck( 'wpDiff' );
 355
 356                                 if( !$this->preview ) {
 357                                         if ( $this->tokenOk( $request ) ) {
 358                                                 # Some browsers will not report any submit button
 359                                                 # if the user hits enter in the comment box.
 360                                                 # The unmarked state will be assumed to be a save,
 361                                                 # if the form seems otherwise complete.
 362                                                 wfDebug( "$fname: Passed token check.\n" );
 363                                         } else {
 364                                                 # Page might be a hack attempt posted from
 365                                                 # an external site. Preview instead of saving.
 366                                                 wfDebug( "$fname: Failed token check; forcing preview\n" );
 367                                                 $this->preview = true;
 368                                         }
 369                                 }
 370                         }
 371                         $this->save    = ! ( $this->preview OR $this->diff );
 372                         if( !preg_match( '/^\d{14}$/', $this->edittime )) {
 373                                 $this->edittime = null;
 374                         }
 375
 376                         if( !preg_match( '/^\d{14}$/', $this->starttime )) {
 377                                 $this->starttime = null;
 378                         }
 379
 380                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 381
 382                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 383                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 384                 } else {
 385                         # Not a posted form? Start with nothing.
 386                         wfDebug( "$fname: Not a posted form.\n" );
 387                         $this->textbox1  = '';
 388                         $this->textbox2  = '';
 389                         $this->mMetaData = '';
 390                         $this->summary   = '';
 391                         $this->edittime  = '';
 392                         $this->starttime = wfTimestampNow();
 393                         $this->preview   = false;
 394                         $this->save      = false;
 395                         $this->diff      = false;
 396                         $this->minoredit = false;
 397                         $this->watchthis = false;
 398                         $this->recreate  = false;
 399                 }
 400
 401                 $this->oldid = $request->getInt( 'oldid' );
 402
 403                 # Section edit can come from either the form or a link
 404                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 405
 406                 $this->live = $request->getCheck( 'live' );
 407                 $this->editintro = $request->getText( 'editintro' );
 408
 409                 wfProfileOut( $fname );
 410         }
 411
 412         /**
 413          * Make sure the form isn't faking a user's credentials.
 414          *
 415          * @param WebRequest $request
 416          * @return bool
 417          * @access private
 418          */
 419         function tokenOk( &$request ) {
 420                 global $wgUser;
 421                 if( $wgUser->isAnon() ) {
 422                         # Anonymous users may not have a session
 423                         # open. Don't tokenize.
 424                         $this->mTokenOk = true;
 425                 } else {
 426                         $this->mTokenOk = $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
 427                 }
 428                 return $this->mTokenOk;
 429         }
 430
 431         function showIntro() {
 432                 global $wgOut, $wgUser;
 433                 $addstandardintro=true;
 434                 if($this->editintro) {
 435                         $introtitle=Title::newFromText($this->editintro);
 436                         if(isset($introtitle) && $introtitle->userCanRead()) {
 437                                 $rev=Revision::newFromTitle($introtitle);
 438                                 if($rev) {
 439                                         $wgOut->addSecondaryWikiText($rev->getText());
 440                                         $addstandardintro=false;
 441                                 }
 442                         }
 443                 }
 444                 if($addstandardintro) {
 445                         if ( $wgUser->isLoggedIn() )
 446                                 $wgOut->addWikiText( wfMsg( 'newarticletext' ) );
 447                         else
 448                                 $wgOut->addWikiText( wfMsg( 'newarticletextanon' ) );
 449                 }
 450         }
 451
 452         /**
 453          * Attempt submission
 454          * @return bool false if output is done, true if the rest of the form should be displayed
 455          */
 456         function attemptSave() {
 457                 global $wgSpamRegex, $wgFilterCallback, $wgUser, $wgOut;
 458                 global $wgMaxArticleSize;
 459
 460                 $fname = 'EditPage::attemptSave';
 461                 wfProfileIn( $fname );
 462                 wfProfileIn( "$fname-checks" );
 463
 464                 # Reintegrate metadata
 465                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 466                 $this->mMetaData = '' ;
 467
 468                 # Check for spam
 469                 if ( $wgSpamRegex && preg_match( $wgSpamRegex, $this->textbox1, $matches ) ) {
 470                         $this->spamPage ( $matches[0] );
 471                         wfProfileOut( "$fname-checks" );
 472                         wfProfileOut( $fname );
 473                         return false;
 474                 }
 475                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $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 ( !wfRunHooks( 'EditFilter', array( &$this, $this->textbox1, $this->section ) ) ) {
 482                         # Error messages or other handling should be performed by the filter function
 483                         wfProfileOut( $fname );
 484                         wfProfileOut( "$fname-checks" );
 485                         return false;
 486                 }
 487                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 488                         # Check block state against master, thus 'false'.
 489                         $this->blockedIPpage();
 490                         wfProfileOut( "$fname-checks" );
 491                         wfProfileOut( $fname );
 492                         return false;
 493                 }
 494                 $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 495                 if ( $this->kblength > $wgMaxArticleSize ) {
 496                         // Error will be displayed by showEditForm()
 497                         $this->tooBig = true;
 498                         wfProfileOut( "$fname-checks" );
 499                         wfProfileOut( $fname );
 500                         return true;
 501                 }
 502
 503                 if ( !$wgUser->isAllowed('edit') ) {
 504                         if ( $wgUser->isAnon() ) {
 505                                 $this->userNotLoggedInPage();
 506                                 wfProfileOut( "$fname-checks" );
 507                                 wfProfileOut( $fname );
 508                                 return false;
 509                         }
 510                         else {
 511                                 $wgOut->readOnlyPage();
 512                                 wfProfileOut( "$fname-checks" );
 513                                 wfProfileOut( $fname );
 514                                 return false;
 515                         }
 516                 }
 517
 518                 if ( wfReadOnly() ) {
 519                         $wgOut->readOnlyPage();
 520                         wfProfileOut( "$fname-checks" );
 521                         wfProfileOut( $fname );
 522                         return false;
 523                 }
 524                 if ( $wgUser->pingLimiter() ) {
 525                         $wgOut->rateLimited();
 526                         wfProfileOut( "$fname-checks" );
 527                         wfProfileOut( $fname );
 528                         return false;
 529                 }
 530
 531                 # If the article has been deleted while editing, don't save it without
 532                 # confirmation
 533                 if ( $this->deletedSinceEdit && !$this->recreate ) {
 534                         wfProfileOut( "$fname-checks" );
 535                         wfProfileOut( $fname );
 536                         return true;
 537                 }
 538
 539                 wfProfileOut( "$fname-checks" );
 540
 541                 # If article is new, insert it.
 542                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 543                 if ( 0 == $aid ) {
 544                         // Late check for create permission, just in case *PARANOIA*
 545                         if ( !$this->mTitle->userCan( 'create' ) ) {
 546                                 wfDebug( "$fname: no create permission\n" );
 547                                 $this->noCreatePermission();
 548                                 wfProfileOut( $fname );
 549                                 return;
 550                         }
 551
 552                         # Don't save a new article if it's blank.
 553                         if ( ( '' == $this->textbox1 ) ) {
 554                                         $wgOut->redirect( $this->mTitle->getFullURL() );
 555                                         wfProfileOut( $fname );
 556                                         return false;
 557                         }
 558
 559                         $isComment=($this->section=='new');
 560                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 561                                 $this->minoredit, $this->watchthis, false, $isComment);
 562
 563                         wfProfileOut( $fname );
 564                         return false;
 565                 }
 566
 567                 # Article exists. Check for edit conflict.
 568
 569                 $this->mArticle->clear(); # Force reload of dates, etc.
 570                 $this->mArticle->forUpdate( true ); # Lock the article
 571
 572                 if( $this->mArticle->getTimestamp() != $this->edittime ) {
 573                         $this->isConflict = true;
 574                         if( $this->section == 'new' ) {
 575                                 if( $this->mArticle->getUserText() == $wgUser->getName() &&
 576                                         $this->mArticle->getComment() == $this->summary ) {
 577                                         // Probably a duplicate submission of a new comment.
 578                                         // This can happen when squid resends a request after
 579                                         // a timeout but the first one actually went through.
 580                                         wfDebug( "EditPage::editForm duplicate new section submission; trigger edit conflict!\n" );
 581                                 } else {
 582                                         // New comment; suppress conflict.
 583                                         $this->isConflict = false;
 584                                         wfDebug( "EditPage::editForm conflict suppressed; new section\n" );
 585                                 }
 586                         }
 587                 }
 588                 $userid = $wgUser->getID();
 589
 590                 if ( $this->isConflict) {
 591                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 592                                 $this->mArticle->getTimestamp() . "'\n" );
 593                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime);
 594                 }
 595                 else {
 596                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 597                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary);
 598                 }
 599                 if( is_null( $text ) ) {
 600                         wfDebug( "EditPage::editForm activating conflict; section replace failed.\n" );
 601                         $this->isConflict = true;
 602                         $text = $this->textbox1;
 603                 }
 604
 605                 # Suppress edit conflict with self, except for section edits where merging is required.
 606                 if ( ( $this->section == '' ) && ( 0 != $userid ) && ( $this->mArticle->getUser() == $userid ) ) {
 607                         wfDebug( "Suppressing edit conflict, same user.\n" );
 608                         $this->isConflict = false;
 609                 } else {
 610                         # switch from section editing to normal editing in edit conflict
 611                         if($this->isConflict) {
 612                                 # Attempt merge
 613                                 if( $this->mergeChangesInto( $text ) ){
 614                                         // Successful merge! Maybe we should tell the user the good news?
 615                                         $this->isConflict = false;
 616                                         wfDebug( "Suppressing edit conflict, successful merge.\n" );
 617                                 } else {
 618                                         $this->section = '';
 619                                         $this->textbox1 = $text;
 620                                         wfDebug( "Keeping edit conflict, failed merge.\n" );
 621                                 }
 622                         }
 623                 }
 624
 625                 if ( $this->isConflict ) {
 626                         wfProfileOut( $fname );
 627                         return true;
 628                 }
 629
 630                 # All's well
 631                 wfProfileIn( "$fname-sectionanchor" );
 632                 $sectionanchor = '';
 633                 if( $this->section == 'new' ) {
 634                         if ( $this->textbox1 == '' ) {
 635                                 $this->missingComment = true;
 636                                 return true;
 637                         }
 638                         if( $this->summary != '' ) {
 639                                 $sectionanchor = $this->sectionAnchor( $this->summary );
 640                         }
 641                 } elseif( $this->section != '' ) {
 642                         # Try to get a section anchor from the section source, redirect to edited section if header found
 643                         # XXX: might be better to integrate this into Article::replaceSection
 644                         # for duplicate heading checking and maybe parsing
 645                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 646                         # we can't deal with anchors, includes, html etc in the header for now,
 647                         # headline would need to be parsed to improve this
 648                         if($hasmatch and strlen($matches[2]) > 0) {
 649                                 $sectionanchor = $this->sectionAnchor( $matches[2] );
 650                         }
 651                 }
 652                 wfProfileOut( "$fname-sectionanchor" );
 653
 654                 // Save errors may fall down to the edit form, but we've now
 655                 // merged the section into full text. Clear the section field
 656                 // so that later submission of conflict forms won't try to
 657                 // replace that into a duplicated mess.
 658                 $this->textbox1 = $text;
 659                 $this->section = '';
 660
 661                 // Check for length errors again now that the section is merged in
 662                 $this->kblength = (int)(strlen( $text ) / 1024);
 663                 if ( $this->kblength > $wgMaxArticleSize ) {
 664                         $this->tooBig = true;
 665                         wfProfileOut( $fname );
 666                         return true;
 667                 }
 668
 669                 # update the article here
 670                 if( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
 671                         $this->watchthis, '', $sectionanchor ) ) {
 672                         wfProfileOut( $fname );
 673                         return false;
 674                 } else {
 675                         $this->isConflict = true;
 676                 }
 677                 wfProfileOut( $fname );
 678                 return true;
 679         }
 680
 681         /**
 682          * Initialise form fields in the object
 683          * Called on the first invocation, e.g. when a user clicks an edit link
 684          */
 685         function initialiseForm() {
 686                 $this->edittime = $this->mArticle->getTimestamp();
 687                 $this->textbox1 = $this->mArticle->getContent();
 688                 $this->summary = '';
 689                 if ( !$this->mArticle->exists() && $this->mArticle->mTitle->getNamespace() == NS_MEDIAWIKI )
 690                         $this->textbox1 = wfMsgWeirdKey ( $this->mArticle->mTitle->getText() ) ;
 691                 wfProxyCheck();
 692         }
 693
 694         /**
 695          * Send the edit form and related headers to $wgOut
 696          * @param $formCallback Optional callable that takes an OutputPage
 697          *                      parameter; will be called during form output
 698          *                      near the top, for captchas and the like.
 699          */
 700         function showEditForm( $formCallback=null ) {
 701                 global $wgOut, $wgUser, $wgLang, $wgContLang, $wgMaxArticleSize;
 702
 703                 $fname = 'EditPage::showEditForm';
 704                 wfProfileIn( $fname );
 705
 706                 $sk =& $wgUser->getSkin();
 707
 708                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) ) ;
 709
 710                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 711
 712                 # Enabled article-related sidebar, toplinks, etc.
 713                 $wgOut->setArticleRelated( true );
 714
 715                 if ( $this->isConflict ) {
 716                         $s = wfMsg( 'editconflict', $this->mTitle->getPrefixedText() );
 717                         $wgOut->setPageTitle( $s );
 718                         $wgOut->addWikiText( wfMsg( 'explainconflict' ) );
 719
 720                         $this->textbox2 = $this->textbox1;
 721                         $this->textbox1 = $this->mArticle->getContent();
 722                         $this->edittime = $this->mArticle->getTimestamp();
 723                 } else {
 724
 725                         if( $this->section != '' ) {
 726                                 if( $this->section == 'new' ) {
 727                                         $s = wfMsg('editingcomment', $this->mTitle->getPrefixedText() );
 728                                 } else {
 729                                         $s = wfMsg('editingsection', $this->mTitle->getPrefixedText() );
 730                                         if( !$this->preview && !$this->diff ) {
 731                                                 preg_match( "/^(=+)(.+)\\1/mi",
 732                                                         $this->textbox1,
 733                                                         $matches );
 734                                                 if( !empty( $matches[2] ) ) {
 735                                                         $this->summary = "/* ". trim($matches[2])." */ ";
 736                                                 }
 737                                         }
 738                                 }
 739                         } else {
 740                                 $s = wfMsg( 'editing', $this->mTitle->getPrefixedText() );
 741                         }
 742                         $wgOut->setPageTitle( $s );
 743
 744                         if ( $this->missingComment ) {
 745                                 $wgOut->addWikiText( wfMsg( 'missingcommenttext' ) );
 746                         }
 747
 748                         if ( !$this->checkUnicodeCompliantBrowser() ) {
 749                                 $wgOut->addWikiText( wfMsg( 'nonunicodebrowser') );
 750                         }
 751                         if ( isset( $this->mArticle )
 752                              && isset( $this->mArticle->mRevision )
 753                              && !$this->mArticle->mRevision->isCurrent() ) {
 754                                 $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
 755                                 $wgOut->addWikiText( wfMsg( 'editingold' ) );
 756                         }
 757                 }
 758
 759                 if( wfReadOnly() ) {
 760                         $wgOut->addWikiText( wfMsg( 'readonlywarning' ) );
 761                 } elseif( $wgUser->isAnon() && $this->formtype != 'preview' ) {
 762                         $wgOut->addWikiText( wfMsg( 'anoneditwarning' ) );
 763                 } else {
 764                         if( $this->isCssJsSubpage && $this->formtype != 'preview' ) {
 765                                 # Check the skin exists
 766                                 if( $this->isValidCssJsSubpage ) {
 767                                         $wgOut->addWikiText( wfMsg( 'usercssjsyoucanpreview' ) );
 768                                 } else {
 769                                         $wgOut->addWikiText( wfMsg( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
 770                                 }
 771                         }
 772                 }
 773
 774                 if( $this->mTitle->isProtected( 'edit' ) ) {
 775                         if( $this->mTitle->isSemiProtected() ) {
 776                                 $notice = wfMsg( 'semiprotectedpagewarning' );
 777                                 if( wfEmptyMsg( 'semiprotectedpagewarning', $notice ) || $notice == '-' ) {
 778                                         $notice = '';
 779                                 }
 780                         } else {
 781                                 $notice = wfMsg( 'protectedpagewarning' );
 782                         }
 783                         $wgOut->addWikiText( $notice );
 784                 }
 785
 786                 if ( $this->kblength === false ) {
 787                         $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 788                 }
 789                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
 790                         $wgOut->addWikiText( wfMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgMaxArticleSize ) );
 791                 } elseif( $this->kblength > 29 ) {
 792                         $wgOut->addWikiText( wfMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) ) );
 793                 }
 794
 795                 $rows = $wgUser->getOption( 'rows' );
 796                 $cols = $wgUser->getOption( 'cols' );
 797
 798                 $ew = $wgUser->getOption( 'editwidth' );
 799                 if ( $ew ) $ew = " style=\"width:100%\"";
 800                 else $ew = '';
 801
 802                 $q = 'action=submit';
 803                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
 804                 $action = $this->mTitle->escapeLocalURL( $q );
 805
 806                 $summary = wfMsg('summary');
 807                 $subject = wfMsg('subject');
 808                 $minor   = wfMsg('minoredit');
 809                 $watchthis = wfMsg ('watchthis');
 810
 811                 $cancel = $sk->makeKnownLink( $this->mTitle->getPrefixedText(),
 812                                 wfMsg('cancel') );
 813                 $edithelpurl = $sk->makeInternalOrExternalUrl( wfMsg( 'edithelppage' ));
 814                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
 815                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
 816                         htmlspecialchars( wfMsg( 'newwindow' ) );
 817
 818                 global $wgRightsText;
 819                 $copywarn = "<div id=\"editpage-copywarn\">\n" .
 820                         wfMsg( $wgRightsText ? 'copyrightwarning' : 'copyrightwarning2',
 821                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
 822                                 $wgRightsText ) . "\n</div>";
 823
 824                 if( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
 825                         # prepare toolbar for edit buttons
 826                         $toolbar = $this->getEditToolbar();
 827                 } else {
 828                         $toolbar = '';
 829                 }
 830
 831                 // activate checkboxes if user wants them to be always active
 832                 if( !$this->preview && !$this->diff ) {
 833                         # Sort out the "watch" checkbox
 834                         if( $wgUser->getOption( 'watchdefault' ) ) {
 835                                 # Watch all edits
 836                                 $this->watchthis = true;
 837                         } elseif( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 838                                 # Watch creations
 839                                 $this->watchthis = true;
 840                         } elseif( $this->mTitle->userIsWatching() ) {
 841                                 # Already watched
 842                                 $this->watchthis = true;
 843                         }
 844
 845                         if( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
 846                 }
 847
 848                 $minoredithtml = '';
 849
 850                 if ( $wgUser->isAllowed('minoredit') ) {
 851                         $minoredithtml =
 852                                 "<input tabindex='3' type='checkbox' value='1' name='wpMinoredit'".($this->minoredit?" checked='checked'":"").
 853                                 " accesskey='".wfMsg('accesskey-minoredit')."' id='wpMinoredit' />".
 854                                 "<label for='wpMinoredit' title='".wfMsg('tooltip-minoredit')."'>{$minor}</label>";
 855                 }
 856
 857                 $watchhtml = '';
 858
 859                 if ( $wgUser->isLoggedIn() ) {
 860                         $watchhtml = "<input tabindex='4' type='checkbox' name='wpWatchthis'".
 861                                 ($this->watchthis?" checked='checked'":"").
 862                                 " accesskey=\"".htmlspecialchars(wfMsg('accesskey-watch'))."\" id='wpWatchthis'  />".
 863                                 "<label for='wpWatchthis' title=\"" .
 864                                         htmlspecialchars(wfMsg('tooltip-watch'))."\">{$watchthis}</label>";
 865                 }
 866
 867                 $checkboxhtml = $minoredithtml . $watchhtml;
 868
 869                 if ( $wgUser->getOption( 'previewontop' ) ) {
 870
 871                         if ( 'preview' == $this->formtype ) {
 872                                 $this->showPreview();
 873                         } else {
 874                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
 875                         }
 876
 877                         if ( 'diff' == $this->formtype ) {
 878                                 $wgOut->addHTML( $this->getDiff() );
 879                         }
 880                 }
 881
 882
 883                 # if this is a comment, show a subject line at the top, which is also the edit summary.
 884                 # Otherwise, show a summary field at the bottom
 885                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
 886                 if( $this->section == 'new' ) {
 887                         $commentsubject="<span id='wpSummaryLabel'><label for='wpSummary'>{$subject}:</label></span> <div class='editOptions'><input tabindex='1' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
 888                         $editsummary = '';
 889                 } else {
 890                         $commentsubject = '';
 891                         $editsummary="<span id='wpSummaryLabel'><label for='wpSummary'>{$summary}:</label></span> <div class='editOptions'><input tabindex='2' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
 892                 }
 893
 894                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
 895                 if( !$this->preview && !$this->diff ) {
 896                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
 897                 }
 898                 $templates = $this->formatTemplates();
 899
 900                 global $wgUseMetadataEdit ;
 901                 if ( $wgUseMetadataEdit ) {
 902                         $metadata = $this->mMetaData ;
 903                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
 904                         $helppage = Title::newFromText( wfMsg( "metadata_page" ) ) ;
 905                         $top = wfMsg( 'metadata', $helppage->getLocalURL() );
 906                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
 907                 }
 908                 else $metadata = "" ;
 909
 910                 $hidden = '';
 911                 $recreate = '';
 912                 if ($this->deletedSinceEdit) {
 913                         if ( 'save' != $this->formtype ) {
 914                                 $wgOut->addWikiText( wfMsg('deletedwhileediting'));
 915                         } else {
 916                                 // Hide the toolbar and edit area, use can click preview to get it back
 917                                 // Add an confirmation checkbox and explanation.
 918                                 $toolbar = '';
 919                                 $hidden = 'type="hidden" style="display:none;"';
 920                                 $recreate = $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ));
 921                                 $recreate .=
 922                                         "<br /><input tabindex='1' type='checkbox' value='1' name='wpRecreate' id='wpRecreate' />".
 923                                         "<label for='wpRecreate' title='".wfMsg('tooltip-recreate')."'>". wfMsg('recreate')."</label>";
 924                         }
 925                 }
 926
 927                 $temp = array(
 928                         'id'        => 'wpSave',
 929                         'name'      => 'wpSave',
 930                         'type'      => 'submit',
 931                         'tabindex'  => '5',
 932                         'value'     => wfMsg('savearticle'),
 933                         'accesskey' => wfMsg('accesskey-save'),
 934                         'title'     => wfMsg('tooltip-save'),
 935                 );
 936                 $buttons['save'] = wfElement('input', $temp, '');
 937                 $temp = array(
 938                         'id'        => 'wpDiff',
 939                         'name'      => 'wpDiff',
 940                         'type'      => 'submit',
 941                         'tabindex'  => '7',
 942                         'value'     => wfMsg('showdiff'),
 943                         'accesskey' => wfMsg('accesskey-diff'),
 944                         'title'     => wfMsg('tooltip-diff'),
 945                 );
 946                 $buttons['diff'] = wfElement('input', $temp, '');
 947
 948                 global $wgLivePreview;
 949                 if ( $wgLivePreview && $wgUser->getOption( 'uselivepreview' ) ) {
 950                         $temp = array(
 951                                 'id'        => 'wpPreview',
 952                                 'name'      => 'wpPreview',
 953                                 'type'      => 'submit',
 954                                 'tabindex'  => '6',
 955                                 'value'     => wfMsg('showpreview'),
 956                                 'accesskey' => '',
 957                                 'title'     => wfMsg('tooltip-preview'),
 958                                 'style'     => 'display: none;',
 959                         );
 960                         $buttons['preview'] = wfElement('input', $temp, '');
 961                         $temp = array(
 962                                 'id'        => 'wpLivePreview',
 963                                 'name'      => 'wpLivePreview',
 964                                 'type'      => 'submit',
 965                                 'tabindex'  => '6',
 966                                 'value'     => wfMsg('showlivepreview'),
 967                                 'accesskey' => wfMsg('accesskey-preview'),
 968                                 'title'     => '',
 969                                 'onclick'   => $this->doLivePreviewScript(),
 970                         );
 971                         $buttons['live'] = wfElement('input', $temp, '');
 972                 } else {
 973                         $temp = array(
 974                                 'id'        => 'wpPreview',
 975                                 'name'      => 'wpPreview',
 976                                 'type'      => 'submit',
 977                                 'tabindex'  => '6',
 978                                 'value'     => wfMsg('showpreview'),
 979                                 'accesskey' => wfMsg('accesskey-preview'),
 980                                 'title'     => wfMsg('tooltip-preview'),
 981                         );
 982                         $buttons['preview'] = wfElement('input', $temp, '');
 983                         $buttons['live'] = '';
 984                 }
 985
 986                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
 987                         ? ""
 988                         : "<input type='hidden' name=\"safemode\" value='1' />\n";
 989
 990                 $wgOut->addHTML( <<<END
 991 {$toolbar}
 992 <form id="editform" name="editform" method="post" action="$action"
 993 enctype="multipart/form-data">
 994 END
 995 );
 996
 997                 if( is_callable( $formCallback ) ) {
 998                         call_user_func_array( $formCallback, array( &$wgOut ) );
 999                 }
1000
1001                 // Put these up at the top to ensure they aren't lost on early form submission
1002                 $wgOut->addHTML( "
1003 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
1004 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
1005 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
1006 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
1007
1008                 $wgOut->addHTML( <<<END
1009 $recreate
1010 {$commentsubject}
1011 <textarea tabindex='1' accesskey="," name="wpTextbox1" id="wpTextbox1" rows='{$rows}'
1012 cols='{$cols}'{$ew} $hidden>
1013 END
1014 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox1 ) ) .
1015 "
1016 </textarea>
1017                 " );
1018
1019                 $wgOut->addWikiText( $copywarn );
1020                 $wgOut->addHTML( "
1021 {$metadata}
1022 {$editsummary}
1023 {$checkboxhtml}
1024 {$safemodehtml}
1025 ");
1026
1027                 $wgOut->addHTML("
1028 <div class='editButtons'>
1029         {$buttons['save']}
1030         {$buttons['preview']}
1031         {$buttons['live']}
1032         {$buttons['diff']}
1033         <span class='editHelp'>{$cancel} | {$edithelp}</span>
1034 </div><!-- editButtons -->
1035 </div><!-- editOptions -->");
1036
1037                 $wgOut->addWikiText( wfMsgForContent( 'edittools' ) );
1038
1039                 $wgOut->addHTML( "
1040 <div class='templatesUsed'>
1041 {$templates}
1042 </div>
1043 " );
1044
1045                 if ( $wgUser->isLoggedIn() ) {
1046                         /**
1047                          * To make it harder for someone to slip a user a page
1048                          * which submits an edit form to the wiki without their
1049                          * knowledge, a random token is associated with the login
1050                          * session. If it's not passed back with the submission,
1051                          * we won't save the page, or render user JavaScript and
1052                          * CSS previews.
1053                          */
1054                         $token = htmlspecialchars( $wgUser->editToken() );
1055                         $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
1056                 }
1057
1058
1059                 if ( $this->isConflict ) {
1060                         require_once( "DifferenceEngine.php" );
1061                         $wgOut->addWikiText( '==' . wfMsg( "yourdiff" ) . '==' );
1062
1063                         $de = new DifferenceEngine( $this->mTitle );
1064                         $de->setText( $this->textbox2, $this->textbox1 );
1065                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1066
1067                         $wgOut->addWikiText( '==' . wfMsg( "yourtext" ) . '==' );
1068                         $wgOut->addHTML( "<textarea tabindex=6 id='wpTextbox2' name=\"wpTextbox2\" rows='{$rows}' cols='{$cols}' wrap='virtual'>"
1069                                 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox2 ) ) . "\n</textarea>" );
1070                 }
1071                 $wgOut->addHTML( "</form>\n" );
1072                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1073
1074                         if ( $this->formtype == 'preview') {
1075                                 $this->showPreview();
1076                         } else {
1077                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
1078                         }
1079
1080                         if ( $this->formtype == 'diff') {
1081                                 $wgOut->addHTML( $this->getDiff() );
1082                         }
1083
1084                 }
1085
1086                 wfProfileOut( $fname );
1087         }
1088
1089         /**
1090          * Append preview output to $wgOut.
1091          * Includes category rendering if this is a category page.
1092          * @access private
1093          */
1094         function showPreview() {
1095                 global $wgOut;
1096                 $wgOut->addHTML( '<div id="wikiPreview">' );
1097                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1098                         $this->mArticle->openShowCategory();
1099                 }
1100                 $previewOutput = $this->getPreviewText();
1101                 $wgOut->addHTML( $previewOutput );
1102                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1103                         $this->mArticle->closeShowCategory();
1104                 }
1105                 $wgOut->addHTML( "<br style=\"clear:both;\" />\n" );
1106                 $wgOut->addHTML( '</div>' );
1107         }
1108
1109         /**
1110          * Prepare a list of templates used by this page. Returns HTML.
1111          */
1112         function formatTemplates() {
1113                 global $wgUser;
1114
1115                 $fname = 'EditPage::formatTemplates';
1116                 wfProfileIn( $fname );
1117
1118                 $sk =& $wgUser->getSkin();
1119
1120                 $outText = '';
1121                 $templates = $this->mArticle->getUsedTemplates();
1122                 if ( count( $templates ) > 0 ) {
1123                         # Do a batch existence check
1124                         $batch = new LinkBatch;
1125                         foreach( $templates as $title ) {
1126                                 $batch->addObj( $title );
1127                         }
1128                         $batch->execute();
1129
1130                         # Construct the HTML
1131                         $outText = '<br />'. wfMsg( 'templatesused' ) . '<ul>';
1132                         foreach ( $templates as $titleObj ) {
1133                                 $outText .= '<li>' . $sk->makeLinkObj( $titleObj ) . '</li>';
1134                         }
1135                         $outText .= '</ul>';
1136                 }
1137                 wfProfileOut( $fname );
1138                 return $outText;
1139         }
1140
1141         /**
1142          * Live Preview lets us fetch rendered preview page content and
1143          * add it to the page without refreshing the whole page.
1144          * If not supported by the browser it will fall through to the normal form
1145          * submission method.
1146          *
1147          * This function outputs a script tag to support live preview, and
1148          * returns an onclick handler which should be added to the attributes
1149          * of the preview button
1150          */
1151         function doLivePreviewScript() {
1152                 global $wgStylePath, $wgJsMimeType, $wgOut, $wgTitle;
1153                 $wgOut->addHTML( '<script type="'.$wgJsMimeType.'" src="' .
1154                         htmlspecialchars( $wgStylePath . '/common/preview.js' ) .
1155                         '"></script>' . "\n" );
1156                 $liveAction = $wgTitle->getLocalUrl( 'action=submit&wpPreview=true&live=true' );
1157                 return "return !livePreview(" .
1158                         "getElementById('wikiPreview')," .
1159                         "editform.wpTextbox1.value," .
1160                         '"' . $liveAction . '"' . ")";
1161         }
1162
1163         function getLastDelete() {
1164                 $dbr =& wfGetDB( DB_SLAVE );
1165                 $fname = 'EditPage::getLastDelete';
1166                 $res = $dbr->select(
1167                         array( 'logging', 'user' ),
1168                         array( 'log_type',
1169                                'log_action',
1170                                'log_timestamp',
1171                                'log_user',
1172                                'log_namespace',
1173                                'log_title',
1174                                'log_comment',
1175                                'log_params',
1176                                'user_name', ),
1177                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1178                                'log_title' => $this->mTitle->getDBkey(),
1179                                'log_type' => 'delete',
1180                                'log_action' => 'delete',
1181                                'user_id=log_user' ),
1182                         $fname,
1183                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
1184
1185                 if($dbr->numRows($res) == 1) {
1186                         while ( $x = $dbr->fetchObject ( $res ) )
1187                                 $data = $x;
1188                         $dbr->freeResult ( $res ) ;
1189                 } else {
1190                         $data = null;
1191                 }
1192                 return $data;
1193         }
1194
1195         /**
1196          * @todo document
1197          */
1198         function getPreviewText() {
1199                 global $wgOut, $wgUser, $wgTitle, $wgParser;
1200
1201                 $fname = 'EditPage::getPreviewText';
1202                 wfProfileIn( $fname );
1203
1204                 if ( $this->mTokenOk ) {
1205                         $msg = 'previewnote';
1206                 } else {
1207                         $msg = 'session_fail_preview';
1208                 }
1209                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
1210                         "<div class='previewnote'>" . $wgOut->parse( wfMsg( $msg ) ) . "</div>\n";
1211                 if ( $this->isConflict ) {
1212                         $previewhead.='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1213                 }
1214
1215                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1216                 $parserOptions->setEditSection( false );
1217
1218                 # don't parse user css/js, show message about preview
1219                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1220
1221                 if ( $this->isCssJsSubpage ) {
1222                         if(preg_match("/\\.css$/", $wgTitle->getText() ) ) {
1223                                 $previewtext = wfMsg('usercsspreview');
1224                         } else if(preg_match("/\\.js$/", $wgTitle->getText() ) ) {
1225                                 $previewtext = wfMsg('userjspreview');
1226                         }
1227                         $parserOptions->setTidy(true);
1228                         $parserOutput = $wgParser->parse( $previewtext , $wgTitle, $parserOptions );
1229                         $wgOut->addHTML( $parserOutput->mText );
1230                         wfProfileOut( $fname );
1231                         return $previewhead;
1232                 } else {
1233                         # if user want to see preview when he edit an article
1234                         if( $wgUser->getOption('previewonfirst') and ($this->textbox1 == '')) {
1235                                 $this->textbox1 = $this->mArticle->getContent();
1236                         }
1237
1238                         $toparse = $this->textbox1;
1239
1240                         # If we're adding a comment, we need to show the
1241                         # summary as the headline
1242                         if($this->section=="new" && $this->summary!="") {
1243                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1244                         }
1245
1246                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData ;
1247                         $parserOptions->setTidy(true);
1248                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ) ."\n\n",
1249                                         $wgTitle, $parserOptions );
1250
1251                         $previewHTML = $parserOutput->getText();
1252                         $wgOut->addParserOutputNoText( $parserOutput );
1253
1254                         wfProfileOut( $fname );
1255                         return $previewhead . $previewHTML;
1256                 }
1257         }
1258
1259         /**
1260          * @todo document
1261          */
1262         function blockedIPpage() {
1263                 global $wgOut;
1264                 $wgOut->blockedPage();
1265         }
1266
1267         /**
1268          * @todo document
1269          */
1270         function userNotLoggedInPage() {
1271                 global $wgOut;
1272
1273                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1274                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1275                 $wgOut->setArticleRelated( false );
1276
1277                 $wgOut->addWikiText( wfMsg( 'whitelistedittext' ) );
1278                 $wgOut->returnToMain( false );
1279         }
1280
1281         /**
1282          * Creates a basic error page which informs the user that
1283          * they have to validate their email address before being
1284          * allowed to edit.
1285          */
1286         function userNotConfirmedPage() {
1287
1288                 global $wgOut;
1289
1290                 $wgOut->setPageTitle( wfMsg( 'confirmedittitle' ) );
1291                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1292                 $wgOut->setArticleRelated( false );
1293                 $wgOut->addWikiText( wfMsg( 'confirmedittext' ) );
1294                 $wgOut->returnToMain( false );
1295         }
1296
1297         /**
1298          * @todo document
1299          */
1300         function spamPage ( $match = false )
1301         {
1302                 global $wgOut;
1303                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1304                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1305                 $wgOut->setArticleRelated( false );
1306
1307                 $wgOut->addWikiText( wfMsg( 'spamprotectiontext' ) );
1308                 if ( $match ) {
1309                         $wgOut->addWikiText( wfMsg( 'spamprotectionmatch', "<nowiki>{$match}</nowiki>" ) );
1310                 }
1311                 $wgOut->returnToMain( false );
1312         }
1313
1314         /**
1315          * @access private
1316          * @todo document
1317          */
1318         function mergeChangesInto( &$editText ){
1319                 $fname = 'EditPage::mergeChangesInto';
1320                 wfProfileIn( $fname );
1321
1322                 $db =& wfGetDB( DB_MASTER );
1323
1324                 // This is the revision the editor started from
1325                 $baseRevision = Revision::loadFromTimestamp(
1326                         $db, $this->mArticle->mTitle, $this->edittime );
1327                 if( is_null( $baseRevision ) ) {
1328                         wfProfileOut( $fname );
1329                         return false;
1330                 }
1331                 $baseText = $baseRevision->getText();
1332
1333                 // The current state, we want to merge updates into it
1334                 $currentRevision =  Revision::loadFromTitle(
1335                         $db, $this->mArticle->mTitle );
1336                 if( is_null( $currentRevision ) ) {
1337                         wfProfileOut( $fname );
1338                         return false;
1339                 }
1340                 $currentText = $currentRevision->getText();
1341
1342                 if( wfMerge( $baseText, $editText, $currentText, $result ) ){
1343                         $editText = $result;
1344                         wfProfileOut( $fname );
1345                         return true;
1346                 } else {
1347                         wfProfileOut( $fname );
1348                         return false;
1349                 }
1350         }
1351
1352         /**
1353          * Check if the browser is on a blacklist of user-agents known to
1354          * mangle UTF-8 data on form submission. Returns true if Unicode
1355          * should make it through, false if it's known to be a problem.
1356          * @return bool
1357          * @access private
1358          */
1359         function checkUnicodeCompliantBrowser() {
1360                 global $wgBrowserBlackList;
1361                 if( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
1362                         // No User-Agent header sent? Trust it by default...
1363                         return true;
1364                 }
1365                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1366                 foreach ( $wgBrowserBlackList as $browser ) {
1367                         if ( preg_match($browser, $currentbrowser) ) {
1368                                 return false;
1369                         }
1370                 }
1371                 return true;
1372         }
1373
1374         /**
1375          * Format an anchor fragment as it would appear for a given section name
1376          * @param string $text
1377          * @return string
1378          * @access private
1379          */
1380         function sectionAnchor( $text ) {
1381                 $headline = Sanitizer::decodeCharReferences( $text );
1382                 # strip out HTML
1383                 $headline = preg_replace( '/<.*?' . '>/', '', $headline );
1384                 $headline = trim( $headline );
1385                 $sectionanchor = '#' . urlencode( str_replace( ' ', '_', $headline ) );
1386                 $replacearray = array(
1387                         '%3A' => ':',
1388                         '%' => '.'
1389                 );
1390                 return str_replace(
1391                         array_keys( $replacearray ),
1392                         array_values( $replacearray ),
1393                         $sectionanchor );
1394         }
1395
1396         /**
1397          * Shows a bulletin board style toolbar for common editing functions.
1398          * It can be disabled in the user preferences.
1399          * The necessary JavaScript code can be found in style/wikibits.js.
1400          */
1401         function getEditToolbar() {
1402                 global $wgStylePath, $wgContLang, $wgJsMimeType;
1403
1404                 /**
1405                  * toolarray an array of arrays which each include the filename of
1406                  * the button image (without path), the opening tag, the closing tag,
1407                  * and optionally a sample text that is inserted between the two when no
1408                  * selection is highlighted.
1409                  * The tip text is shown when the user moves the mouse over the button.
1410                  *
1411                  * Already here are accesskeys (key), which are not used yet until someone
1412                  * can figure out a way to make them work in IE. However, we should make
1413                  * sure these keys are not defined on the edit page.
1414                  */
1415                 $toolarray=array(
1416                         array(  'image'=>'button_bold.png',
1417                                         'open'  =>      "\'\'\'",
1418                                         'close' =>      "\'\'\'",
1419                                         'sample'=>      wfMsg('bold_sample'),
1420                                         'tip'   =>      wfMsg('bold_tip'),
1421                                         'key'   =>      'B'
1422                                 ),
1423                         array(  'image'=>'button_italic.png',
1424                                         'open'  =>      "\'\'",
1425                                         'close' =>      "\'\'",
1426                                         'sample'=>      wfMsg('italic_sample'),
1427                                         'tip'   =>      wfMsg('italic_tip'),
1428                                         'key'   =>      'I'
1429                                 ),
1430                         array(  'image'=>'button_link.png',
1431                                         'open'  =>      '[[',
1432                                         'close' =>      ']]',
1433                                         'sample'=>      wfMsg('link_sample'),
1434                                         'tip'   =>      wfMsg('link_tip'),
1435                                         'key'   =>      'L'
1436                                 ),
1437                         array(  'image'=>'button_extlink.png',
1438                                         'open'  =>      '[',
1439                                         'close' =>      ']',
1440                                         'sample'=>      wfMsg('extlink_sample'),
1441                                         'tip'   =>      wfMsg('extlink_tip'),
1442                                         'key'   =>      'X'
1443                                 ),
1444                         array(  'image'=>'button_headline.png',
1445                                         'open'  =>      "\\n== ",
1446                                         'close' =>      " ==\\n",
1447                                         'sample'=>      wfMsg('headline_sample'),
1448                                         'tip'   =>      wfMsg('headline_tip'),
1449                                         'key'   =>      'H'
1450                                 ),
1451                         array(  'image'=>'button_image.png',
1452                                         'open'  =>      '[['.$wgContLang->getNsText(NS_IMAGE).":",
1453                                         'close' =>      ']]',
1454                                         'sample'=>      wfMsg('image_sample'),
1455                                         'tip'   =>      wfMsg('image_tip'),
1456                                         'key'   =>      'D'
1457                                 ),
1458                         array(  'image' =>'button_media.png',
1459                                         'open'  =>      '[['.$wgContLang->getNsText(NS_MEDIA).':',
1460                                         'close' =>      ']]',
1461                                         'sample'=>      wfMsg('media_sample'),
1462                                         'tip'   =>      wfMsg('media_tip'),
1463                                         'key'   =>      'M'
1464                                 ),
1465                         array(  'image' =>'button_math.png',
1466                                         'open'  =>      "\\<math\\>",
1467                                         'close' =>      "\\</math\\>",
1468                                         'sample'=>      wfMsg('math_sample'),
1469                                         'tip'   =>      wfMsg('math_tip'),
1470                                         'key'   =>      'C'
1471                                 ),
1472                         array(  'image' =>'button_nowiki.png',
1473                                         'open'  =>      "\\<nowiki\\>",
1474                                         'close' =>      "\\</nowiki\\>",
1475                                         'sample'=>      wfMsg('nowiki_sample'),
1476                                         'tip'   =>      wfMsg('nowiki_tip'),
1477                                         'key'   =>      'N'
1478                                 ),
1479                         array(  'image' =>'button_sig.png',
1480                                         'open'  =>      '--~~~~',
1481                                         'close' =>      '',
1482                                         'sample'=>      '',
1483                                         'tip'   =>      wfMsg('sig_tip'),
1484                                         'key'   =>      'Y'
1485                                 ),
1486                         array(  'image' =>'button_hr.png',
1487                                         'open'  =>      "\\n----\\n",
1488                                         'close' =>      '',
1489                                         'sample'=>      '',
1490                                         'tip'   =>      wfMsg('hr_tip'),
1491                                         'key'   =>      'R'
1492                                 )
1493                 );
1494                 $toolbar ="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
1495
1496                 $toolbar.="document.writeln(\"<div id='toolbar'>\");\n";
1497                 foreach($toolarray as $tool) {
1498
1499                         $image=$wgStylePath.'/common/images/'.$tool['image'];
1500                         $open=$tool['open'];
1501                         $close=$tool['close'];
1502                         $sample = wfEscapeJsString( $tool['sample'] );
1503
1504                         // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
1505                         // Older browsers show a "speedtip" type message only for ALT.
1506                         // Ideally these should be different, realistically they
1507                         // probably don't need to be.
1508                         $tip = wfEscapeJsString( $tool['tip'] );
1509
1510                         #$key = $tool["key"];
1511
1512                         $toolbar.="addButton('$image','$tip','$open','$close','$sample');\n";
1513                 }
1514
1515                 $toolbar.="document.writeln(\"</div>\");\n";
1516                 $toolbar.="/*]]>*/\n</script>";
1517                 return $toolbar;
1518         }
1519
1520         /**
1521          * Output preview text only. This can be sucked into the edit page
1522          * via JavaScript, and saves the server time rendering the skin as
1523          * well as theoretically being more robust on the client (doesn't
1524          * disturb the edit box's undo history, won't eat your text on
1525          * failure, etc).
1526          *
1527          * @todo This doesn't include category or interlanguage links.
1528          *       Would need to enhance it a bit, maybe wrap them in XML
1529          *       or something... that might also require more skin
1530          *       initialization, so check whether that's a problem.
1531          */
1532         function livePreview() {
1533                 global $wgOut;
1534                 $wgOut->disable();
1535                 header( 'Content-type: text/xml' );
1536                 header( 'Cache-control: no-cache' );
1537                 # FIXME
1538                 echo $this->getPreviewText( );
1539                 /* To not shake screen up and down between preview and live-preview */
1540                 echo "<br style=\"clear:both;\" />\n";
1541         }
1542
1543
1544         /**
1545          * Get a diff between the current contents of the edit box and the
1546          * version of the page we're editing from.
1547          *
1548          * If this is a section edit, we'll replace the section as for final
1549          * save and then make a comparison.
1550          *
1551          * @return string HTML
1552          */
1553         function getDiff() {
1554                 require_once( 'DifferenceEngine.php' );
1555                 $oldtext = $this->mArticle->fetchContent();
1556                 $newtext = $this->mArticle->replaceSection(
1557                         $this->section, $this->textbox1, $this->summary, $this->edittime );
1558                 $oldtitle = wfMsg( 'currentrev' );
1559                 $newtitle = wfMsg( 'yourtext' );
1560                 if ( $oldtext !== false  || $newtext != '' ) {
1561                         $de = new DifferenceEngine( $this->mTitle );
1562                         $de->setText( $oldtext, $newtext );
1563                         $difftext = $de->getDiff( $oldtitle, $newtitle );
1564                 } else {
1565                         $difftext = '';
1566                 }
1567
1568                 return '<div id="wikiDiff">' . $difftext . '</div>';
1569         }
1570
1571         /**
1572          * Filter an input field through a Unicode de-armoring process if it
1573          * came from an old browser with known broken Unicode editing issues.
1574          *
1575          * @param WebRequest $request
1576          * @param string $field
1577          * @return string
1578          * @access private
1579          */
1580         function safeUnicodeInput( $request, $field ) {
1581                 $text = rtrim( $request->getText( $field ) );
1582                 return $request->getBool( 'safemode' )
1583                         ? $this->unmakesafe( $text )
1584                         : $text;
1585         }
1586
1587         /**
1588          * Filter an output field through a Unicode armoring process if it is
1589          * going to an old browser with known broken Unicode editing issues.
1590          *
1591          * @param string $text
1592          * @return string
1593          * @access private
1594          */
1595         function safeUnicodeOutput( $text ) {
1596                 global $wgContLang;
1597                 $codedText = $wgContLang->recodeForEdit( $text );
1598                 return $this->checkUnicodeCompliantBrowser()
1599                         ? $codedText
1600                         : $this->makesafe( $codedText );
1601         }
1602
1603         /**
1604          * A number of web browsers are known to corrupt non-ASCII characters
1605          * in a UTF-8 text editing environment. To protect against this,
1606          * detected browsers will be served an armored version of the text,
1607          * with non-ASCII chars converted to numeric HTML character references.
1608          *
1609          * Preexisting such character references will have a 0 added to them
1610          * to ensure that round-trips do not alter the original data.
1611          *
1612          * @param string $invalue
1613          * @return string
1614          * @access private
1615          */
1616         function makesafe( $invalue ) {
1617                 // Armor existing references for reversability.
1618                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
1619
1620                 $bytesleft = 0;
1621                 $result = "";
1622                 $working = 0;
1623                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1624                         $bytevalue = ord( $invalue{$i} );
1625                         if( $bytevalue <= 0x7F ) { //0xxx xxxx
1626                                 $result .= chr( $bytevalue );
1627                                 $bytesleft = 0;
1628                         } elseif( $bytevalue <= 0xBF ) { //10xx xxxx
1629                                 $working = $working << 6;
1630                                 $working += ($bytevalue & 0x3F);
1631                                 $bytesleft--;
1632                                 if( $bytesleft <= 0 ) {
1633                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
1634                                 }
1635                         } elseif( $bytevalue <= 0xDF ) { //110x xxxx
1636                                 $working = $bytevalue & 0x1F;
1637                                 $bytesleft = 1;
1638                         } elseif( $bytevalue <= 0xEF ) { //1110 xxxx
1639                                 $working = $bytevalue & 0x0F;
1640                                 $bytesleft = 2;
1641                         } else { //1111 0xxx
1642                                 $working = $bytevalue & 0x07;
1643                                 $bytesleft = 3;
1644                         }
1645                 }
1646                 return $result;
1647         }
1648
1649         /**
1650          * Reverse the previously applied transliteration of non-ASCII characters
1651          * back to UTF-8. Used to protect data from corruption by broken web browsers
1652          * as listed in $wgBrowserBlackList.
1653          *
1654          * @param string $invalue
1655          * @return string
1656          * @access private
1657          */
1658         function unmakesafe( $invalue ) {
1659                 $result = "";
1660                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1661                         if( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
1662                                 $i += 3;
1663                                 $hexstring = "";
1664                                 do {
1665                                         $hexstring .= $invalue{$i};
1666                                         $i++;
1667                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
1668
1669                                 // Do some sanity checks. These aren't needed for reversability,
1670                                 // but should help keep the breakage down if the editor
1671                                 // breaks one of the entities whilst editing.
1672                                 if ((substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6)) {
1673                                         $codepoint = hexdec($hexstring);
1674                                         $result .= codepointToUtf8( $codepoint );
1675                                 } else {
1676                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
1677                                 }
1678                         } else {
1679                                 $result .= substr( $invalue, $i, 1 );
1680                         }
1681                 }
1682                 // reverse the transform that we made for reversability reasons.
1683                 return strtr( $result, array( "&#x0" => "&#x" ) );
1684         }
1685
1686         function noCreatePermission() {
1687                 global $wgOut;
1688                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
1689                 $wgOut->addWikiText( wfMsg( 'nocreatetext' ) );
1690         }
1691
1692 }
1693
1694 ?>