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                         if( $wgUser->getOption( 'watchdefault' ) ) $this->watchthis = true;
 834                         if( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
 835
 836                         // activate checkbox also if user is already watching the page,
 837                         // require wpWatchthis to be unset so that second condition is not
 838                         // checked unnecessarily
 839                         if( !$this->watchthis && $this->mTitle->userIsWatching() ) $this->watchthis = true;
 840                 }
 841
 842                 $minoredithtml = '';
 843
 844                 if ( $wgUser->isAllowed('minoredit') ) {
 845                         $minoredithtml =
 846                                 "<input tabindex='3' type='checkbox' value='1' name='wpMinoredit'".($this->minoredit?" checked='checked'":"").
 847                                 " accesskey='".wfMsg('accesskey-minoredit')."' id='wpMinoredit' />".
 848                                 "<label for='wpMinoredit' title='".wfMsg('tooltip-minoredit')."'>{$minor}</label>";
 849                 }
 850
 851                 $watchhtml = '';
 852
 853                 if ( $wgUser->isLoggedIn() ) {
 854                         $watchhtml = "<input tabindex='4' type='checkbox' name='wpWatchthis'".
 855                                 ($this->watchthis?" checked='checked'":"").
 856                                 " accesskey=\"".htmlspecialchars(wfMsg('accesskey-watch'))."\" id='wpWatchthis'  />".
 857                                 "<label for='wpWatchthis' title=\"" .
 858                                         htmlspecialchars(wfMsg('tooltip-watch'))."\">{$watchthis}</label>";
 859                 }
 860
 861                 $checkboxhtml = $minoredithtml . $watchhtml;
 862
 863                 if ( $wgUser->getOption( 'previewontop' ) ) {
 864
 865                         if ( 'preview' == $this->formtype ) {
 866                                 $this->showPreview();
 867                         } else {
 868                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
 869                         }
 870
 871                         if ( 'diff' == $this->formtype ) {
 872                                 $wgOut->addHTML( $this->getDiff() );
 873                         }
 874                 }
 875
 876
 877                 # if this is a comment, show a subject line at the top, which is also the edit summary.
 878                 # Otherwise, show a summary field at the bottom
 879                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
 880                 if( $this->section == 'new' ) {
 881                         $commentsubject="<span id='wpSummaryLabel'><label for='wpSummary'>{$subject}:</label></span> <div class='editOptions'><input tabindex='1' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
 882                         $editsummary = '';
 883                 } else {
 884                         $commentsubject = '';
 885                         $editsummary="<span id='wpSummaryLabel'><label for='wpSummary'>{$summary}:</label></span> <div class='editOptions'><input tabindex='2' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
 886                 }
 887
 888                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
 889                 if( !$this->preview && !$this->diff ) {
 890                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
 891                 }
 892                 $templates = $this->formatTemplates();
 893
 894                 global $wgUseMetadataEdit ;
 895                 if ( $wgUseMetadataEdit ) {
 896                         $metadata = $this->mMetaData ;
 897                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
 898                         $helppage = Title::newFromText( wfMsg( "metadata_page" ) ) ;
 899                         $top = wfMsg( 'metadata', $helppage->getLocalURL() );
 900                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
 901                 }
 902                 else $metadata = "" ;
 903
 904                 $hidden = '';
 905                 $recreate = '';
 906                 if ($this->deletedSinceEdit) {
 907                         if ( 'save' != $this->formtype ) {
 908                                 $wgOut->addWikiText( wfMsg('deletedwhileediting'));
 909                         } else {
 910                                 // Hide the toolbar and edit area, use can click preview to get it back
 911                                 // Add an confirmation checkbox and explanation.
 912                                 $toolbar = '';
 913                                 $hidden = 'type="hidden" style="display:none;"';
 914                                 $recreate = $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ));
 915                                 $recreate .=
 916                                         "<br /><input tabindex='1' type='checkbox' value='1' name='wpRecreate' id='wpRecreate' />".
 917                                         "<label for='wpRecreate' title='".wfMsg('tooltip-recreate')."'>". wfMsg('recreate')."</label>";
 918                         }
 919                 }
 920
 921                 $temp = array(
 922                         'id'        => 'wpSave',
 923                         'name'      => 'wpSave',
 924                         'type'      => 'submit',
 925                         'tabindex'  => '5',
 926                         'value'     => wfMsg('savearticle'),
 927                         'accesskey' => wfMsg('accesskey-save'),
 928                         'title'     => wfMsg('tooltip-save'),
 929                 );
 930                 $buttons['save'] = wfElement('input', $temp, '');
 931                 $temp = array(
 932                         'id'        => 'wpDiff',
 933                         'name'      => 'wpDiff',
 934                         'type'      => 'submit',
 935                         'tabindex'  => '7',
 936                         'value'     => wfMsg('showdiff'),
 937                         'accesskey' => wfMsg('accesskey-diff'),
 938                         'title'     => wfMsg('tooltip-diff'),
 939                 );
 940                 $buttons['diff'] = wfElement('input', $temp, '');
 941
 942                 global $wgLivePreview;
 943                 if ( $wgLivePreview && $wgUser->getOption( 'uselivepreview' ) ) {
 944                         $temp = array(
 945                                 'id'        => 'wpPreview',
 946                                 'name'      => 'wpPreview',
 947                                 'type'      => 'submit',
 948                                 'tabindex'  => '6',
 949                                 'value'     => wfMsg('showpreview'),
 950                                 'accesskey' => '',
 951                                 'title'     => wfMsg('tooltip-preview'),
 952                                 'style'     => 'display: none;',
 953                         );
 954                         $buttons['preview'] = wfElement('input', $temp, '');
 955                         $temp = array(
 956                                 'id'        => 'wpLivePreview',
 957                                 'name'      => 'wpLivePreview',
 958                                 'type'      => 'submit',
 959                                 'tabindex'  => '6',
 960                                 'value'     => wfMsg('showlivepreview'),
 961                                 'accesskey' => wfMsg('accesskey-preview'),
 962                                 'title'     => '',
 963                                 'onclick'   => $this->doLivePreviewScript(),
 964                         );
 965                         $buttons['live'] = wfElement('input', $temp, '');
 966                 } else {
 967                         $temp = array(
 968                                 'id'        => 'wpPreview',
 969                                 'name'      => 'wpPreview',
 970                                 'type'      => 'submit',
 971                                 'tabindex'  => '6',
 972                                 'value'     => wfMsg('showpreview'),
 973                                 'accesskey' => wfMsg('accesskey-preview'),
 974                                 'title'     => wfMsg('tooltip-preview'),
 975                         );
 976                         $buttons['preview'] = wfElement('input', $temp, '');
 977                         $buttons['live'] = '';
 978                 }
 979
 980                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
 981                         ? ""
 982                         : "<input type='hidden' name=\"safemode\" value='1' />\n";
 983
 984                 $wgOut->addHTML( <<<END
 985 {$toolbar}
 986 <form id="editform" name="editform" method="post" action="$action"
 987 enctype="multipart/form-data">
 988 END
 989 );
 990
 991                 if( is_callable( $formCallback ) ) {
 992                         call_user_func_array( $formCallback, array( &$wgOut ) );
 993                 }
 994
 995                 // Put these up at the top to ensure they aren't lost on early form submission
 996                 $wgOut->addHTML( "
 997 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
 998 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
 999 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
1000 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
1001
1002                 $wgOut->addHTML( <<<END
1003 $recreate
1004 {$commentsubject}
1005 <textarea tabindex='1' accesskey="," name="wpTextbox1" id="wpTextbox1" rows='{$rows}'
1006 cols='{$cols}'{$ew} $hidden>
1007 END
1008 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox1 ) ) .
1009 "
1010 </textarea>
1011                 " );
1012
1013                 $wgOut->addWikiText( $copywarn );
1014                 $wgOut->addHTML( "
1015 {$metadata}
1016 {$editsummary}
1017 {$checkboxhtml}
1018 {$safemodehtml}
1019 ");
1020
1021                 $wgOut->addHTML("
1022 <div class='editButtons'>
1023         {$buttons['save']}
1024         {$buttons['preview']}
1025         {$buttons['live']}
1026         {$buttons['diff']}
1027         <span class='editHelp'>{$cancel} | {$edithelp}</span>
1028 </div><!-- editButtons -->
1029 </div><!-- editOptions -->");
1030
1031                 $wgOut->addWikiText( wfMsgForContent( 'edittools' ) );
1032
1033                 $wgOut->addHTML( "
1034 <div class='templatesUsed'>
1035 {$templates}
1036 </div>
1037 " );
1038
1039                 if ( $wgUser->isLoggedIn() ) {
1040                         /**
1041                          * To make it harder for someone to slip a user a page
1042                          * which submits an edit form to the wiki without their
1043                          * knowledge, a random token is associated with the login
1044                          * session. If it's not passed back with the submission,
1045                          * we won't save the page, or render user JavaScript and
1046                          * CSS previews.
1047                          */
1048                         $token = htmlspecialchars( $wgUser->editToken() );
1049                         $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
1050                 }
1051
1052
1053                 if ( $this->isConflict ) {
1054                         require_once( "DifferenceEngine.php" );
1055                         $wgOut->addWikiText( '==' . wfMsg( "yourdiff" ) . '==' );
1056
1057                         $de = new DifferenceEngine( $this->mTitle );
1058                         $de->setText( $this->textbox2, $this->textbox1 );
1059                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1060
1061                         $wgOut->addWikiText( '==' . wfMsg( "yourtext" ) . '==' );
1062                         $wgOut->addHTML( "<textarea tabindex=6 id='wpTextbox2' name=\"wpTextbox2\" rows='{$rows}' cols='{$cols}' wrap='virtual'>"
1063                                 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox2 ) ) . "\n</textarea>" );
1064                 }
1065                 $wgOut->addHTML( "</form>\n" );
1066                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1067
1068                         if ( $this->formtype == 'preview') {
1069                                 $this->showPreview();
1070                         } else {
1071                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
1072                         }
1073
1074                         if ( $this->formtype == 'diff') {
1075                                 $wgOut->addHTML( $this->getDiff() );
1076                         }
1077
1078                 }
1079
1080                 wfProfileOut( $fname );
1081         }
1082
1083         /**
1084          * Append preview output to $wgOut.
1085          * Includes category rendering if this is a category page.
1086          * @access private
1087          */
1088         function showPreview() {
1089                 global $wgOut;
1090                 $wgOut->addHTML( '<div id="wikiPreview">' );
1091                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1092                         $this->mArticle->openShowCategory();
1093                 }
1094                 $previewOutput = $this->getPreviewText();
1095                 $wgOut->addHTML( $previewOutput );
1096                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1097                         $this->mArticle->closeShowCategory();
1098                 }
1099                 $wgOut->addHTML( "<br style=\"clear:both;\" />\n" );
1100                 $wgOut->addHTML( '</div>' );
1101         }
1102
1103         /**
1104          * Prepare a list of templates used by this page. Returns HTML.
1105          */
1106         function formatTemplates() {
1107                 global $wgUser;
1108
1109                 $fname = 'EditPage::formatTemplates';
1110                 wfProfileIn( $fname );
1111
1112                 $sk =& $wgUser->getSkin();
1113
1114                 $outText = '';
1115                 $templates = $this->mArticle->getUsedTemplates();
1116                 if ( count( $templates ) > 0 ) {
1117                         # Do a batch existence check
1118                         $batch = new LinkBatch;
1119                         foreach( $templates as $title ) {
1120                                 $batch->addObj( $title );
1121                         }
1122                         $batch->execute();
1123
1124                         # Construct the HTML
1125                         $outText = '<br />'. wfMsg( 'templatesused' ) . '<ul>';
1126                         foreach ( $templates as $titleObj ) {
1127                                 $outText .= '<li>' . $sk->makeLinkObj( $titleObj ) . '</li>';
1128                         }
1129                         $outText .= '</ul>';
1130                 }
1131                 wfProfileOut( $fname );
1132                 return $outText;
1133         }
1134
1135         /**
1136          * Live Preview lets us fetch rendered preview page content and
1137          * add it to the page without refreshing the whole page.
1138          * If not supported by the browser it will fall through to the normal form
1139          * submission method.
1140          *
1141          * This function outputs a script tag to support live preview, and
1142          * returns an onclick handler which should be added to the attributes
1143          * of the preview button
1144          */
1145         function doLivePreviewScript() {
1146                 global $wgStylePath, $wgJsMimeType, $wgOut, $wgTitle;
1147                 $wgOut->addHTML( '<script type="'.$wgJsMimeType.'" src="' .
1148                         htmlspecialchars( $wgStylePath . '/common/preview.js' ) .
1149                         '"></script>' . "\n" );
1150                 $liveAction = $wgTitle->getLocalUrl( 'action=submit&wpPreview=true&live=true' );
1151                 return "return !livePreview(" .
1152                         "getElementById('wikiPreview')," .
1153                         "editform.wpTextbox1.value," .
1154                         '"' . $liveAction . '"' . ")";
1155         }
1156
1157         function getLastDelete() {
1158                 $dbr =& wfGetDB( DB_SLAVE );
1159                 $fname = 'EditPage::getLastDelete';
1160                 $res = $dbr->select(
1161                         array( 'logging', 'user' ),
1162                         array( 'log_type',
1163                                'log_action',
1164                                'log_timestamp',
1165                                'log_user',
1166                                'log_namespace',
1167                                'log_title',
1168                                'log_comment',
1169                                'log_params',
1170                                'user_name', ),
1171                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1172                                'log_title' => $this->mTitle->getDBkey(),
1173                                'log_type' => 'delete',
1174                                'log_action' => 'delete',
1175                                'user_id=log_user' ),
1176                         $fname,
1177                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
1178
1179                 if($dbr->numRows($res) == 1) {
1180                         while ( $x = $dbr->fetchObject ( $res ) )
1181                                 $data = $x;
1182                         $dbr->freeResult ( $res ) ;
1183                 } else {
1184                         $data = null;
1185                 }
1186                 return $data;
1187         }
1188
1189         /**
1190          * @todo document
1191          */
1192         function getPreviewText() {
1193                 global $wgOut, $wgUser, $wgTitle, $wgParser;
1194
1195                 $fname = 'EditPage::getPreviewText';
1196                 wfProfileIn( $fname );
1197
1198                 if ( $this->mTokenOk ) {
1199                         $msg = 'previewnote';
1200                 } else {
1201                         $msg = 'session_fail_preview';
1202                 }
1203                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
1204                         "<div class='previewnote'>" . $wgOut->parse( wfMsg( $msg ) ) . "</div>\n";
1205                 if ( $this->isConflict ) {
1206                         $previewhead.='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1207                 }
1208
1209                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1210                 $parserOptions->setEditSection( false );
1211
1212                 # don't parse user css/js, show message about preview
1213                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1214
1215                 if ( $this->isCssJsSubpage ) {
1216                         if(preg_match("/\\.css$/", $wgTitle->getText() ) ) {
1217                                 $previewtext = wfMsg('usercsspreview');
1218                         } else if(preg_match("/\\.js$/", $wgTitle->getText() ) ) {
1219                                 $previewtext = wfMsg('userjspreview');
1220                         }
1221                         $parserOptions->setTidy(true);
1222                         $parserOutput = $wgParser->parse( $previewtext , $wgTitle, $parserOptions );
1223                         $wgOut->addHTML( $parserOutput->mText );
1224                         wfProfileOut( $fname );
1225                         return $previewhead;
1226                 } else {
1227                         # if user want to see preview when he edit an article
1228                         if( $wgUser->getOption('previewonfirst') and ($this->textbox1 == '')) {
1229                                 $this->textbox1 = $this->mArticle->getContent();
1230                         }
1231
1232                         $toparse = $this->textbox1;
1233
1234                         # If we're adding a comment, we need to show the
1235                         # summary as the headline
1236                         if($this->section=="new" && $this->summary!="") {
1237                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1238                         }
1239
1240                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData ;
1241                         $parserOptions->setTidy(true);
1242                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ) ."\n\n",
1243                                         $wgTitle, $parserOptions );
1244
1245                         $previewHTML = $parserOutput->getText();
1246                         $wgOut->addParserOutputNoText( $parserOutput );
1247
1248                         wfProfileOut( $fname );
1249                         return $previewhead . $previewHTML;
1250                 }
1251         }
1252
1253         /**
1254          * @todo document
1255          */
1256         function blockedIPpage() {
1257                 global $wgOut;
1258                 $wgOut->blockedPage();
1259         }
1260
1261         /**
1262          * @todo document
1263          */
1264         function userNotLoggedInPage() {
1265                 global $wgOut;
1266
1267                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1268                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1269                 $wgOut->setArticleRelated( false );
1270
1271                 $wgOut->addWikiText( wfMsg( 'whitelistedittext' ) );
1272                 $wgOut->returnToMain( false );
1273         }
1274
1275         /**
1276          * Creates a basic error page which informs the user that
1277          * they have to validate their email address before being
1278          * allowed to edit.
1279          */
1280         function userNotConfirmedPage() {
1281
1282                 global $wgOut;
1283
1284                 $wgOut->setPageTitle( wfMsg( 'confirmedittitle' ) );
1285                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1286                 $wgOut->setArticleRelated( false );
1287                 $wgOut->addWikiText( wfMsg( 'confirmedittext' ) );
1288                 $wgOut->returnToMain( false );
1289         }
1290
1291         /**
1292          * @todo document
1293          */
1294         function spamPage ( $match = false )
1295         {
1296                 global $wgOut;
1297                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1298                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1299                 $wgOut->setArticleRelated( false );
1300
1301                 $wgOut->addWikiText( wfMsg( 'spamprotectiontext' ) );
1302                 if ( $match ) {
1303                         $wgOut->addWikiText( wfMsg( 'spamprotectionmatch', "<nowiki>{$match}</nowiki>" ) );
1304                 }
1305                 $wgOut->returnToMain( false );
1306         }
1307
1308         /**
1309          * @access private
1310          * @todo document
1311          */
1312         function mergeChangesInto( &$editText ){
1313                 $fname = 'EditPage::mergeChangesInto';
1314                 wfProfileIn( $fname );
1315
1316                 $db =& wfGetDB( DB_MASTER );
1317
1318                 // This is the revision the editor started from
1319                 $baseRevision = Revision::loadFromTimestamp(
1320                         $db, $this->mArticle->mTitle, $this->edittime );
1321                 if( is_null( $baseRevision ) ) {
1322                         wfProfileOut( $fname );
1323                         return false;
1324                 }
1325                 $baseText = $baseRevision->getText();
1326
1327                 // The current state, we want to merge updates into it
1328                 $currentRevision =  Revision::loadFromTitle(
1329                         $db, $this->mArticle->mTitle );
1330                 if( is_null( $currentRevision ) ) {
1331                         wfProfileOut( $fname );
1332                         return false;
1333                 }
1334                 $currentText = $currentRevision->getText();
1335
1336                 if( wfMerge( $baseText, $editText, $currentText, $result ) ){
1337                         $editText = $result;
1338                         wfProfileOut( $fname );
1339                         return true;
1340                 } else {
1341                         wfProfileOut( $fname );
1342                         return false;
1343                 }
1344         }
1345
1346         /**
1347          * Check if the browser is on a blacklist of user-agents known to
1348          * mangle UTF-8 data on form submission. Returns true if Unicode
1349          * should make it through, false if it's known to be a problem.
1350          * @return bool
1351          * @access private
1352          */
1353         function checkUnicodeCompliantBrowser() {
1354                 global $wgBrowserBlackList;
1355                 if( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
1356                         // No User-Agent header sent? Trust it by default...
1357                         return true;
1358                 }
1359                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1360                 foreach ( $wgBrowserBlackList as $browser ) {
1361                         if ( preg_match($browser, $currentbrowser) ) {
1362                                 return false;
1363                         }
1364                 }
1365                 return true;
1366         }
1367
1368         /**
1369          * Format an anchor fragment as it would appear for a given section name
1370          * @param string $text
1371          * @return string
1372          * @access private
1373          */
1374         function sectionAnchor( $text ) {
1375                 $headline = Sanitizer::decodeCharReferences( $text );
1376                 # strip out HTML
1377                 $headline = preg_replace( '/<.*?' . '>/', '', $headline );
1378                 $headline = trim( $headline );
1379                 $sectionanchor = '#' . urlencode( str_replace( ' ', '_', $headline ) );
1380                 $replacearray = array(
1381                         '%3A' => ':',
1382                         '%' => '.'
1383                 );
1384                 return str_replace(
1385                         array_keys( $replacearray ),
1386                         array_values( $replacearray ),
1387                         $sectionanchor );
1388         }
1389
1390         /**
1391          * Shows a bulletin board style toolbar for common editing functions.
1392          * It can be disabled in the user preferences.
1393          * The necessary JavaScript code can be found in style/wikibits.js.
1394          */
1395         function getEditToolbar() {
1396                 global $wgStylePath, $wgContLang, $wgJsMimeType;
1397
1398                 /**
1399                  * toolarray an array of arrays which each include the filename of
1400                  * the button image (without path), the opening tag, the closing tag,
1401                  * and optionally a sample text that is inserted between the two when no
1402                  * selection is highlighted.
1403                  * The tip text is shown when the user moves the mouse over the button.
1404                  *
1405                  * Already here are accesskeys (key), which are not used yet until someone
1406                  * can figure out a way to make them work in IE. However, we should make
1407                  * sure these keys are not defined on the edit page.
1408                  */
1409                 $toolarray=array(
1410                         array(  'image'=>'button_bold.png',
1411                                         'open'  =>      "\'\'\'",
1412                                         'close' =>      "\'\'\'",
1413                                         'sample'=>      wfMsg('bold_sample'),
1414                                         'tip'   =>      wfMsg('bold_tip'),
1415                                         'key'   =>      'B'
1416                                 ),
1417                         array(  'image'=>'button_italic.png',
1418                                         'open'  =>      "\'\'",
1419                                         'close' =>      "\'\'",
1420                                         'sample'=>      wfMsg('italic_sample'),
1421                                         'tip'   =>      wfMsg('italic_tip'),
1422                                         'key'   =>      'I'
1423                                 ),
1424                         array(  'image'=>'button_link.png',
1425                                         'open'  =>      '[[',
1426                                         'close' =>      ']]',
1427                                         'sample'=>      wfMsg('link_sample'),
1428                                         'tip'   =>      wfMsg('link_tip'),
1429                                         'key'   =>      'L'
1430                                 ),
1431                         array(  'image'=>'button_extlink.png',
1432                                         'open'  =>      '[',
1433                                         'close' =>      ']',
1434                                         'sample'=>      wfMsg('extlink_sample'),
1435                                         'tip'   =>      wfMsg('extlink_tip'),
1436                                         'key'   =>      'X'
1437                                 ),
1438                         array(  'image'=>'button_headline.png',
1439                                         'open'  =>      "\\n== ",
1440                                         'close' =>      " ==\\n",
1441                                         'sample'=>      wfMsg('headline_sample'),
1442                                         'tip'   =>      wfMsg('headline_tip'),
1443                                         'key'   =>      'H'
1444                                 ),
1445                         array(  'image'=>'button_image.png',
1446                                         'open'  =>      '[['.$wgContLang->getNsText(NS_IMAGE).":",
1447                                         'close' =>      ']]',
1448                                         'sample'=>      wfMsg('image_sample'),
1449                                         'tip'   =>      wfMsg('image_tip'),
1450                                         'key'   =>      'D'
1451                                 ),
1452                         array(  'image' =>'button_media.png',
1453                                         'open'  =>      '[['.$wgContLang->getNsText(NS_MEDIA).':',
1454                                         'close' =>      ']]',
1455                                         'sample'=>      wfMsg('media_sample'),
1456                                         'tip'   =>      wfMsg('media_tip'),
1457                                         'key'   =>      'M'
1458                                 ),
1459                         array(  'image' =>'button_math.png',
1460                                         'open'  =>      "\\<math\\>",
1461                                         'close' =>      "\\</math\\>",
1462                                         'sample'=>      wfMsg('math_sample'),
1463                                         'tip'   =>      wfMsg('math_tip'),
1464                                         'key'   =>      'C'
1465                                 ),
1466                         array(  'image' =>'button_nowiki.png',
1467                                         'open'  =>      "\\<nowiki\\>",
1468                                         'close' =>      "\\</nowiki\\>",
1469                                         'sample'=>      wfMsg('nowiki_sample'),
1470                                         'tip'   =>      wfMsg('nowiki_tip'),
1471                                         'key'   =>      'N'
1472                                 ),
1473                         array(  'image' =>'button_sig.png',
1474                                         'open'  =>      '--~~~~',
1475                                         'close' =>      '',
1476                                         'sample'=>      '',
1477                                         'tip'   =>      wfMsg('sig_tip'),
1478                                         'key'   =>      'Y'
1479                                 ),
1480                         array(  'image' =>'button_hr.png',
1481                                         'open'  =>      "\\n----\\n",
1482                                         'close' =>      '',
1483                                         'sample'=>      '',
1484                                         'tip'   =>      wfMsg('hr_tip'),
1485                                         'key'   =>      'R'
1486                                 )
1487                 );
1488                 $toolbar ="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
1489
1490                 $toolbar.="document.writeln(\"<div id='toolbar'>\");\n";
1491                 foreach($toolarray as $tool) {
1492
1493                         $image=$wgStylePath.'/common/images/'.$tool['image'];
1494                         $open=$tool['open'];
1495                         $close=$tool['close'];
1496                         $sample = wfEscapeJsString( $tool['sample'] );
1497
1498                         // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
1499                         // Older browsers show a "speedtip" type message only for ALT.
1500                         // Ideally these should be different, realistically they
1501                         // probably don't need to be.
1502                         $tip = wfEscapeJsString( $tool['tip'] );
1503
1504                         #$key = $tool["key"];
1505
1506                         $toolbar.="addButton('$image','$tip','$open','$close','$sample');\n";
1507                 }
1508
1509                 $toolbar.="document.writeln(\"</div>\");\n";
1510                 $toolbar.="/*]]>*/\n</script>";
1511                 return $toolbar;
1512         }
1513
1514         /**
1515          * Output preview text only. This can be sucked into the edit page
1516          * via JavaScript, and saves the server time rendering the skin as
1517          * well as theoretically being more robust on the client (doesn't
1518          * disturb the edit box's undo history, won't eat your text on
1519          * failure, etc).
1520          *
1521          * @todo This doesn't include category or interlanguage links.
1522          *       Would need to enhance it a bit, maybe wrap them in XML
1523          *       or something... that might also require more skin
1524          *       initialization, so check whether that's a problem.
1525          */
1526         function livePreview() {
1527                 global $wgOut;
1528                 $wgOut->disable();
1529                 header( 'Content-type: text/xml' );
1530                 header( 'Cache-control: no-cache' );
1531                 # FIXME
1532                 echo $this->getPreviewText( );
1533                 /* To not shake screen up and down between preview and live-preview */
1534                 echo "<br style=\"clear:both;\" />\n";
1535         }
1536
1537
1538         /**
1539          * Get a diff between the current contents of the edit box and the
1540          * version of the page we're editing from.
1541          *
1542          * If this is a section edit, we'll replace the section as for final
1543          * save and then make a comparison.
1544          *
1545          * @return string HTML
1546          */
1547         function getDiff() {
1548                 require_once( 'DifferenceEngine.php' );
1549                 $oldtext = $this->mArticle->fetchContent();
1550                 $newtext = $this->mArticle->replaceSection(
1551                         $this->section, $this->textbox1, $this->summary, $this->edittime );
1552                 $oldtitle = wfMsg( 'currentrev' );
1553                 $newtitle = wfMsg( 'yourtext' );
1554                 if ( $oldtext !== false  || $newtext != '' ) {
1555                         $de = new DifferenceEngine( $this->mTitle );
1556                         $de->setText( $oldtext, $newtext );
1557                         $difftext = $de->getDiff( $oldtitle, $newtitle );
1558                 } else {
1559                         $difftext = '';
1560                 }
1561
1562                 return '<div id="wikiDiff">' . $difftext . '</div>';
1563         }
1564
1565         /**
1566          * Filter an input field through a Unicode de-armoring process if it
1567          * came from an old browser with known broken Unicode editing issues.
1568          *
1569          * @param WebRequest $request
1570          * @param string $field
1571          * @return string
1572          * @access private
1573          */
1574         function safeUnicodeInput( $request, $field ) {
1575                 $text = rtrim( $request->getText( $field ) );
1576                 return $request->getBool( 'safemode' )
1577                         ? $this->unmakesafe( $text )
1578                         : $text;
1579         }
1580
1581         /**
1582          * Filter an output field through a Unicode armoring process if it is
1583          * going to an old browser with known broken Unicode editing issues.
1584          *
1585          * @param string $text
1586          * @return string
1587          * @access private
1588          */
1589         function safeUnicodeOutput( $text ) {
1590                 global $wgContLang;
1591                 $codedText = $wgContLang->recodeForEdit( $text );
1592                 return $this->checkUnicodeCompliantBrowser()
1593                         ? $codedText
1594                         : $this->makesafe( $codedText );
1595         }
1596
1597         /**
1598          * A number of web browsers are known to corrupt non-ASCII characters
1599          * in a UTF-8 text editing environment. To protect against this,
1600          * detected browsers will be served an armored version of the text,
1601          * with non-ASCII chars converted to numeric HTML character references.
1602          *
1603          * Preexisting such character references will have a 0 added to them
1604          * to ensure that round-trips do not alter the original data.
1605          *
1606          * @param string $invalue
1607          * @return string
1608          * @access private
1609          */
1610         function makesafe( $invalue ) {
1611                 // Armor existing references for reversability.
1612                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
1613
1614                 $bytesleft = 0;
1615                 $result = "";
1616                 $working = 0;
1617                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1618                         $bytevalue = ord( $invalue{$i} );
1619                         if( $bytevalue <= 0x7F ) { //0xxx xxxx
1620                                 $result .= chr( $bytevalue );
1621                                 $bytesleft = 0;
1622                         } elseif( $bytevalue <= 0xBF ) { //10xx xxxx
1623                                 $working = $working << 6;
1624                                 $working += ($bytevalue & 0x3F);
1625                                 $bytesleft--;
1626                                 if( $bytesleft <= 0 ) {
1627                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
1628                                 }
1629                         } elseif( $bytevalue <= 0xDF ) { //110x xxxx
1630                                 $working = $bytevalue & 0x1F;
1631                                 $bytesleft = 1;
1632                         } elseif( $bytevalue <= 0xEF ) { //1110 xxxx
1633                                 $working = $bytevalue & 0x0F;
1634                                 $bytesleft = 2;
1635                         } else { //1111 0xxx
1636                                 $working = $bytevalue & 0x07;
1637                                 $bytesleft = 3;
1638                         }
1639                 }
1640                 return $result;
1641         }
1642
1643         /**
1644          * Reverse the previously applied transliteration of non-ASCII characters
1645          * back to UTF-8. Used to protect data from corruption by broken web browsers
1646          * as listed in $wgBrowserBlackList.
1647          *
1648          * @param string $invalue
1649          * @return string
1650          * @access private
1651          */
1652         function unmakesafe( $invalue ) {
1653                 $result = "";
1654                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1655                         if( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
1656                                 $i += 3;
1657                                 $hexstring = "";
1658                                 do {
1659                                         $hexstring .= $invalue{$i};
1660                                         $i++;
1661                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
1662
1663                                 // Do some sanity checks. These aren't needed for reversability,
1664                                 // but should help keep the breakage down if the editor
1665                                 // breaks one of the entities whilst editing.
1666                                 if ((substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6)) {
1667                                         $codepoint = hexdec($hexstring);
1668                                         $result .= codepointToUtf8( $codepoint );
1669                                 } else {
1670                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
1671                                 }
1672                         } else {
1673                                 $result .= substr( $invalue, $i, 1 );
1674                         }
1675                 }
1676                 // reverse the transform that we made for reversability reasons.
1677                 return strtr( $result, array( "&#x0" => "&#x" ) );
1678         }
1679
1680         function noCreatePermission() {
1681                 global $wgOut;
1682                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
1683                 $wgOut->addWikiText( wfMsg( 'nocreatetext' ) );
1684         }
1685
1686 }
1687
1688 ?>