includes/EditPage.php

   1 <?php
   2 /**
   3  * Contain the EditPage class
   4  * @package MediaWiki
   5  */
   6
   7 /**
   8  * Splitting edit page/HTML interface from Article...
   9  * The actual database and text munging is still in Article,
  10  * but it should get easier to call those from alternate
  11  * interfaces.
  12  *
  13  * @package MediaWiki
  14  */
  15
  16 class EditPage {
  17         var $mArticle;
  18         var $mTitle;
  19         var $mMetaData = '';
  20         var $isConflict = false;
  21         var $isCssJsSubpage = false;
  22         var $deletedSinceEdit = false;
  23         var $formtype;
  24         var $firsttime;
  25         var $lastDelete;
  26         var $mTokenOk = false;
  27         var $mTriedSave = false;
  28         var $tooBig = false;
  29         var $kblength = false;
  30         var $missingComment = false;
  31         var $missingSummary = false;
  32         var $allowBlankSummary = false;
  33         var $autoSumm = '';
  34         var $hookError = '';
  35
  36         # Form values
  37         var $save = false, $preview = false, $diff = false;
  38         var $minoredit = false, $watchthis = false, $recreate = false;
  39         var $textbox1 = '', $textbox2 = '', $summary = '';
  40         var $edittime = '', $section = '', $starttime = '';
  41         var $oldid = 0, $editintro = '', $scrolltop = null;
  42
  43         /**
  44          * @todo document
  45          * @param $article
  46          */
  47         function EditPage( $article ) {
  48                 $this->mArticle =& $article;
  49                 global $wgTitle;
  50                 $this->mTitle =& $wgTitle;
  51         }
  52
  53         /**
  54          * Fetch initial editing page content.
  55          */
  56         private function getContent() {
  57                 global $wgRequest, $wgParser;
  58
  59                 # Get variables from query string :P
  60                 $section = $wgRequest->getVal( 'section' );
  61                 $preload = $wgRequest->getVal( 'preload' );
  62
  63                 wfProfileIn( __METHOD__ );
  64
  65                 $text = '';
  66                 if( !$this->mTitle->exists() ) {
  67
  68                         # If requested, preload some text.
  69                         $text = $this->getPreloadedText( $preload );
  70
  71                         # We used to put MediaWiki:Newarticletext here if
  72                         # $text was empty at this point.
  73                         # This is now shown above the edit box instead.
  74                 } else {
  75                         // FIXME: may be better to use Revision class directly
  76                         // But don't mess with it just yet. Article knows how to
  77                         // fetch the page record from the high-priority server,
  78                         // which is needed to guarantee we don't pick up lagged
  79                         // information.
  80
  81                         $text = $this->mArticle->getContent();
  82
  83                         if( $section != '' ) {
  84                                 if( $section == 'new' ) {
  85                                         $text = $this->getPreloadedText( $preload );
  86                                 } else {
  87                                         $text = $wgParser->getSection( $text, $section );
  88                                 }
  89                         }
  90                 }
  91
  92                 wfProfileOut( __METHOD__ );
  93                 return $text;
  94         }
  95
  96         /**
  97          * Get the contents of a page from its title and remove includeonly tags
  98          *
  99          * @param $preload String: the title of the page.
 100          * @return string The contents of the page.
 101          */
 102         private function getPreloadedText($preload) {
 103                 if ( $preload === '' )
 104                         return '';
 105                 else {
 106                         $preloadTitle = Title::newFromText( $preload );
 107                         if ( isset( $preloadTitle ) && $preloadTitle->userCanRead() ) {
 108                                 $rev=Revision::newFromTitle($preloadTitle);
 109                                 if ( is_object( $rev ) ) {
 110                                         $text = $rev->getText();
 111                                         // TODO FIXME: AAAAAAAAAAA, this shouldn't be implementing
 112                                         // its own mini-parser! -ævar
 113                                         $text = preg_replace( '~</?includeonly>~', '', $text );
 114                                         return $text;
 115                                 } else
 116                                         return '';
 117                         }
 118                 }
 119         }
 120
 121         /**
 122          * This is the function that extracts metadata from the article body on the first view.
 123          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
 124          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
 125          */
 126         function extractMetaDataFromArticle () {
 127                 global $wgUseMetadataEdit , $wgMetadataWhitelist , $wgLang ;
 128                 $this->mMetaData = '' ;
 129                 if ( !$wgUseMetadataEdit ) return ;
 130                 if ( $wgMetadataWhitelist == '' ) return ;
 131                 $s = '' ;
 132                 $t = $this->getContent();
 133
 134                 # MISSING : <nowiki> filtering
 135
 136                 # Categories and language links
 137                 $t = explode ( "\n" , $t ) ;
 138                 $catlow = strtolower ( $wgLang->getNsText ( NS_CATEGORY ) ) ;
 139                 $cat = $ll = array() ;
 140                 foreach ( $t AS $key => $x )
 141                 {
 142                         $y = trim ( strtolower ( $x ) ) ;
 143                         while ( substr ( $y , 0 , 2 ) == '[[' )
 144                         {
 145                                 $y = explode ( ']]' , trim ( $x ) ) ;
 146                                 $first = array_shift ( $y ) ;
 147                                 $first = explode ( ':' , $first ) ;
 148                                 $ns = array_shift ( $first ) ;
 149                                 $ns = trim ( str_replace ( '[' , '' , $ns ) ) ;
 150                                 if ( strlen ( $ns ) == 2 OR strtolower ( $ns ) == $catlow )
 151                                 {
 152                                         $add = '[[' . $ns . ':' . implode ( ':' , $first ) . ']]' ;
 153                                         if ( strtolower ( $ns ) == $catlow ) $cat[] = $add ;
 154                                         else $ll[] = $add ;
 155                                         $x = implode ( ']]' , $y ) ;
 156                                         $t[$key] = $x ;
 157                                         $y = trim ( strtolower ( $x ) ) ;
 158                                 }
 159                         }
 160                 }
 161                 if ( count ( $cat ) ) $s .= implode ( ' ' , $cat ) . "\n" ;
 162                 if ( count ( $ll ) ) $s .= implode ( ' ' , $ll ) . "\n" ;
 163                 $t = implode ( "\n" , $t ) ;
 164
 165                 # Load whitelist
 166                 $sat = array () ; # stand-alone-templates; must be lowercase
 167                 $wl_title = Title::newFromText ( $wgMetadataWhitelist ) ;
 168                 $wl_article = new Article ( $wl_title ) ;
 169                 $wl = explode ( "\n" , $wl_article->getContent() ) ;
 170                 foreach ( $wl AS $x )
 171                 {
 172                         $isentry = false ;
 173                         $x = trim ( $x ) ;
 174                         while ( substr ( $x , 0 , 1 ) == '*' )
 175                         {
 176                                 $isentry = true ;
 177                                 $x = trim ( substr ( $x , 1 ) ) ;
 178                         }
 179                         if ( $isentry )
 180                         {
 181                                 $sat[] = strtolower ( $x ) ;
 182                         }
 183
 184                 }
 185
 186                 # Templates, but only some
 187                 $t = explode ( '{{' , $t ) ;
 188                 $tl = array () ;
 189                 foreach ( $t AS $key => $x )
 190                 {
 191                         $y = explode ( '}}' , $x , 2 ) ;
 192                         if ( count ( $y ) == 2 )
 193                         {
 194                                 $z = $y[0] ;
 195                                 $z = explode ( '|' , $z ) ;
 196                                 $tn = array_shift ( $z ) ;
 197                                 if ( in_array ( strtolower ( $tn ) , $sat ) )
 198                                 {
 199                                         $tl[] = '{{' . $y[0] . '}}' ;
 200                                         $t[$key] = $y[1] ;
 201                                         $y = explode ( '}}' , $y[1] , 2 ) ;
 202                                 }
 203                                 else $t[$key] = '{{' . $x ;
 204                         }
 205                         else if ( $key != 0 ) $t[$key] = '{{' . $x ;
 206                         else $t[$key] = $x ;
 207                 }
 208                 if ( count ( $tl ) ) $s .= implode ( ' ' , $tl ) ;
 209                 $t = implode ( '' , $t ) ;
 210
 211                 $t = str_replace ( "\n\n\n" , "\n" , $t ) ;
 212                 $this->mArticle->mContent = $t ;
 213                 $this->mMetaData = $s ;
 214         }
 215
 216         function submit() {
 217                 $this->edit();
 218         }
 219
 220         /**
 221          * This is the function that gets called for "action=edit". It
 222          * sets up various member variables, then passes execution to
 223          * another function, usually showEditForm()
 224          *
 225          * The edit form is self-submitting, so that when things like
 226          * preview and edit conflicts occur, we get the same form back
 227          * with the extra stuff added.  Only when the final submission
 228          * is made and all is well do we actually save and redirect to
 229          * the newly-edited page.
 230          */
 231         function edit() {
 232                 global $wgOut, $wgUser, $wgRequest, $wgTitle;
 233                 global $wgEmailConfirmToEdit;
 234
 235                 if ( ! wfRunHooks( 'AlternateEdit', array( &$this  ) ) )
 236                         return;
 237
 238                 $fname = 'EditPage::edit';
 239                 wfProfileIn( $fname );
 240                 wfDebug( "$fname: enter\n" );
 241
 242                 // this is not an article
 243                 $wgOut->setArticleFlag(false);
 244
 245                 $this->importFormData( $wgRequest );
 246                 $this->firsttime = false;
 247
 248                 if( $this->live ) {
 249                         $this->livePreview();
 250                         wfProfileOut( $fname );
 251                         return;
 252                 }
 253
 254                 if ( ! $this->mTitle->userCanEdit() ) {
 255                         wfDebug( "$fname: user can't edit\n" );
 256                         $wgOut->readOnlyPage( $this->getContent(), true );
 257                         wfProfileOut( $fname );
 258                         return;
 259                 }
 260                 wfDebug( "$fname: Checking blocks\n" );
 261                 if ( !$this->preview && !$this->diff && $wgUser->isBlockedFrom( $this->mTitle, !$this->save ) ) {
 262                         # When previewing, don't check blocked state - will get caught at save time.
 263                         # Also, check when starting edition is done against slave to improve performance.
 264                         wfDebug( "$fname: user is blocked\n" );
 265                         $this->blockedPage();
 266                         wfProfileOut( $fname );
 267                         return;
 268                 }
 269                 if ( !$wgUser->isAllowed('edit') ) {
 270                         if ( $wgUser->isAnon() ) {
 271                                 wfDebug( "$fname: user must log in\n" );
 272                                 $this->userNotLoggedInPage();
 273                                 wfProfileOut( $fname );
 274                                 return;
 275                         } else {
 276                                 wfDebug( "$fname: read-only page\n" );
 277                                 $wgOut->readOnlyPage( $this->getContent(), true );
 278                                 wfProfileOut( $fname );
 279                                 return;
 280                         }
 281                 }
 282                 if ($wgEmailConfirmToEdit && !$wgUser->isEmailConfirmed()) {
 283                         wfDebug("$fname: user must confirm e-mail address\n");
 284                         $this->userNotConfirmedPage();
 285                         wfProfileOut($fname);
 286                         return;
 287                 }
 288                 if ( !$this->mTitle->userCanCreate() && !$this->mTitle->exists() ) {
 289                         wfDebug( "$fname: no create permission\n" );
 290                         $this->noCreatePermission();
 291                         wfProfileOut( $fname );
 292                         return;
 293                 }
 294                 if ( wfReadOnly() ) {
 295                         wfDebug( "$fname: read-only mode is engaged\n" );
 296                         if( $this->save || $this->preview ) {
 297                                 $this->formtype = 'preview';
 298                         } else if ( $this->diff ) {
 299                                 $this->formtype = 'diff';
 300                         } else {
 301                                 $wgOut->readOnlyPage( $this->getContent() );
 302                                 wfProfileOut( $fname );
 303                                 return;
 304                         }
 305                 } else {
 306                         if ( $this->save ) {
 307                                 $this->formtype = 'save';
 308                         } else if ( $this->preview ) {
 309                                 $this->formtype = 'preview';
 310                         } else if ( $this->diff ) {
 311                                 $this->formtype = 'diff';
 312                         } else { # First time through
 313                                 $this->firsttime = true;
 314                                 if( $this->previewOnOpen() ) {
 315                                         $this->formtype = 'preview';
 316                                 } else {
 317                                         $this->extractMetaDataFromArticle () ;
 318                                         $this->formtype = 'initial';
 319                                 }
 320                         }
 321                 }
 322
 323                 wfProfileIn( "$fname-business-end" );
 324
 325                 $this->isConflict = false;
 326                 // css / js subpages of user pages get a special treatment
 327                 $this->isCssJsSubpage      = $wgTitle->isCssJsSubpage();
 328                 $this->isValidCssJsSubpage = $wgTitle->isValidCssJsSubpage();
 329
 330                 /* Notice that we can't use isDeleted, because it returns true if article is ever deleted
 331                  * no matter it's current state
 332                  */
 333                 $this->deletedSinceEdit = false;
 334                 if ( $this->edittime != '' ) {
 335                         /* Note that we rely on logging table, which hasn't been always there,
 336                          * but that doesn't matter, because this only applies to brand new
 337                          * deletes. This is done on every preview and save request. Move it further down
 338                          * to only perform it on saves
 339                          */
 340                         if ( $this->mTitle->isDeleted() ) {
 341                                 $this->lastDelete = $this->getLastDelete();
 342                                 if ( !is_null($this->lastDelete) ) {
 343                                         $deletetime = $this->lastDelete->log_timestamp;
 344                                         if ( ($deletetime - $this->starttime) > 0 ) {
 345                                                 $this->deletedSinceEdit = true;
 346                                         }
 347                                 }
 348                         }
 349                 }
 350
 351                 if(!$this->mTitle->getArticleID() && ('initial' == $this->formtype || $this->firsttime )) { # new article
 352                         $this->showIntro();
 353                 }
 354                 if( $this->mTitle->isTalkPage() ) {
 355                         $wgOut->addWikiText( wfMsg( 'talkpagetext' ) );
 356                 }
 357
 358                 # Attempt submission here.  This will check for edit conflicts,
 359                 # and redundantly check for locked database, blocked IPs, etc.
 360                 # that edit() already checked just in case someone tries to sneak
 361                 # in the back door with a hand-edited submission URL.
 362
 363                 if ( 'save' == $this->formtype ) {
 364                         if ( !$this->attemptSave() ) {
 365                                 wfProfileOut( "$fname-business-end" );
 366                                 wfProfileOut( $fname );
 367                                 return;
 368                         }
 369                 }
 370
 371                 # First time through: get contents, set time for conflict
 372                 # checking, etc.
 373                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 374                         $this->initialiseForm();
 375                         if( !$this->mTitle->getArticleId() )
 376                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 377                 }
 378
 379                 $this->showEditForm();
 380                 wfProfileOut( "$fname-business-end" );
 381                 wfProfileOut( $fname );
 382         }
 383
 384         /**
 385          * Return true if this page should be previewed when the edit form
 386          * is initially opened.
 387          * @return bool
 388          * @private
 389          */
 390         function previewOnOpen() {
 391                 global $wgUser;
 392                 return $this->section != 'new' &&
 393                         ( ( $wgUser->getOption( 'previewonfirst' ) && $this->mTitle->exists() ) ||
 394                                 ( $this->mTitle->getNamespace() == NS_CATEGORY &&
 395                                         !$this->mTitle->exists() ) );
 396         }
 397
 398         /**
 399          * @todo document
 400          * @param $request
 401          */
 402         function importFormData( &$request ) {
 403                 global $wgLang, $wgUser;
 404                 $fname = 'EditPage::importFormData';
 405                 wfProfileIn( $fname );
 406
 407                 if( $request->wasPosted() ) {
 408                         # These fields need to be checked for encoding.
 409                         # Also remove trailing whitespace, but don't remove _initial_
 410                         # whitespace from the text boxes. This may be significant formatting.
 411                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 412                         $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
 413                         $this->mMetaData = rtrim( $request->getText( 'metadata'   ) );
 414                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 415                         $this->summary   = $wgLang->truncate( $request->getText( 'wpSummary'  ), 250 );
 416
 417                         $this->edittime = $request->getVal( 'wpEdittime' );
 418                         $this->starttime = $request->getVal( 'wpStarttime' );
 419
 420                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 421
 422                         if( is_null( $this->edittime ) ) {
 423                                 # If the form is incomplete, force to preview.
 424                                 wfDebug( "$fname: Form data appears to be incomplete\n" );
 425                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 426                                 $this->preview  = true;
 427                         } else {
 428                                 /* Fallback for live preview */
 429                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 430                                 $this->diff = $request->getCheck( 'wpDiff' );
 431
 432                                 // Remember whether a save was requested, so we can indicate
 433                                 // if we forced preview due to session failure.
 434                                 $this->mTriedSave = !$this->preview;
 435
 436                                 if ( $this->tokenOk( $request ) ) {
 437                                         # Some browsers will not report any submit button
 438                                         # if the user hits enter in the comment box.
 439                                         # The unmarked state will be assumed to be a save,
 440                                         # if the form seems otherwise complete.
 441                                         wfDebug( "$fname: Passed token check.\n" );
 442                                 } else {
 443                                         # Page might be a hack attempt posted from
 444                                         # an external site. Preview instead of saving.
 445                                         wfDebug( "$fname: Failed token check; forcing preview\n" );
 446                                         $this->preview = true;
 447                                 }
 448                         }
 449                         $this->save    = ! ( $this->preview OR $this->diff );
 450                         if( !preg_match( '/^\d{14}$/', $this->edittime )) {
 451                                 $this->edittime = null;
 452                         }
 453
 454                         if( !preg_match( '/^\d{14}$/', $this->starttime )) {
 455                                 $this->starttime = null;
 456                         }
 457
 458                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 459
 460                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 461                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 462
 463                         # Don't force edit summaries when a user is editing their own user or talk page
 464                         if( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) && $this->mTitle->getText() == $wgUser->getName() ) {
 465                                 $this->allowBlankSummary = true;
 466                         } else {
 467                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' );
 468                         }
 469
 470                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 471                 } else {
 472                         # Not a posted form? Start with nothing.
 473                         wfDebug( "$fname: Not a posted form.\n" );
 474                         $this->textbox1  = '';
 475                         $this->textbox2  = '';
 476                         $this->mMetaData = '';
 477                         $this->summary   = '';
 478                         $this->edittime  = '';
 479                         $this->starttime = wfTimestampNow();
 480                         $this->preview   = false;
 481                         $this->save      = false;
 482                         $this->diff      = false;
 483                         $this->minoredit = false;
 484                         $this->watchthis = false;
 485                         $this->recreate  = false;
 486                 }
 487
 488                 $this->oldid = $request->getInt( 'oldid' );
 489
 490                 # Section edit can come from either the form or a link
 491                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 492
 493                 $this->live = $request->getCheck( 'live' );
 494                 $this->editintro = $request->getText( 'editintro' );
 495
 496                 wfProfileOut( $fname );
 497         }
 498
 499         /**
 500          * Make sure the form isn't faking a user's credentials.
 501          *
 502          * @param $request WebRequest
 503          * @return bool
 504          * @private
 505          */
 506         function tokenOk( &$request ) {
 507                 global $wgUser;
 508                 if( $wgUser->isAnon() ) {
 509                         # Anonymous users may not have a session
 510                         # open. Don't tokenize.
 511                         $this->mTokenOk = true;
 512                 } else {
 513                         $this->mTokenOk = $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
 514                 }
 515                 return $this->mTokenOk;
 516         }
 517
 518         /** */
 519         function showIntro() {
 520                 global $wgOut, $wgUser;
 521                 $addstandardintro=true;
 522                 if($this->editintro) {
 523                         $introtitle=Title::newFromText($this->editintro);
 524                         if(isset($introtitle) && $introtitle->userCanRead()) {
 525                                 $rev=Revision::newFromTitle($introtitle);
 526                                 if($rev) {
 527                                         $wgOut->addSecondaryWikiText($rev->getText());
 528                                         $addstandardintro=false;
 529                                 }
 530                         }
 531                 }
 532                 if($addstandardintro) {
 533                         if ( $wgUser->isLoggedIn() )
 534                                 $wgOut->addWikiText( wfMsg( 'newarticletext' ) );
 535                         else
 536                                 $wgOut->addWikiText( wfMsg( 'newarticletextanon' ) );
 537                 }
 538         }
 539
 540         /**
 541          * Attempt submission
 542          * @return bool false if output is done, true if the rest of the form should be displayed
 543          */
 544         function attemptSave() {
 545                 global $wgSpamRegex, $wgFilterCallback, $wgUser, $wgOut;
 546                 global $wgMaxArticleSize;
 547
 548                 $fname = 'EditPage::attemptSave';
 549                 wfProfileIn( $fname );
 550                 wfProfileIn( "$fname-checks" );
 551
 552                 # Reintegrate metadata
 553                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 554                 $this->mMetaData = '' ;
 555
 556                 # Check for spam
 557                 if ( $wgSpamRegex && preg_match( $wgSpamRegex, $this->textbox1, $matches ) ) {
 558                         $this->spamPage ( $matches[0] );
 559                         wfProfileOut( "$fname-checks" );
 560                         wfProfileOut( $fname );
 561                         return false;
 562                 }
 563                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section ) ) {
 564                         # Error messages or other handling should be performed by the filter function
 565                         wfProfileOut( $fname );
 566                         wfProfileOut( "$fname-checks" );
 567                         return false;
 568                 }
 569                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError ) ) ) {
 570                         # Error messages etc. could be handled within the hook...
 571                         wfProfileOut( $fname );
 572                         wfProfileOut( "$fname-checks" );
 573                         return false;
 574                 } elseif( $this->hookError != '' ) {
 575                         # ...or the hook could be expecting us to produce an error
 576                         wfProfileOut( "$fname-checks " );
 577                         wfProfileOut( $fname );
 578                         return true;
 579                 }
 580                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 581                         # Check block state against master, thus 'false'.
 582                         $this->blockedPage();
 583                         wfProfileOut( "$fname-checks" );
 584                         wfProfileOut( $fname );
 585                         return false;
 586                 }
 587                 $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 588                 if ( $this->kblength > $wgMaxArticleSize ) {
 589                         // Error will be displayed by showEditForm()
 590                         $this->tooBig = true;
 591                         wfProfileOut( "$fname-checks" );
 592                         wfProfileOut( $fname );
 593                         return true;
 594                 }
 595
 596                 if ( !$wgUser->isAllowed('edit') ) {
 597                         if ( $wgUser->isAnon() ) {
 598                                 $this->userNotLoggedInPage();
 599                                 wfProfileOut( "$fname-checks" );
 600                                 wfProfileOut( $fname );
 601                                 return false;
 602                         }
 603                         else {
 604                                 $wgOut->readOnlyPage();
 605                                 wfProfileOut( "$fname-checks" );
 606                                 wfProfileOut( $fname );
 607                                 return false;
 608                         }
 609                 }
 610
 611                 if ( wfReadOnly() ) {
 612                         $wgOut->readOnlyPage();
 613                         wfProfileOut( "$fname-checks" );
 614                         wfProfileOut( $fname );
 615                         return false;
 616                 }
 617                 if ( $wgUser->pingLimiter() ) {
 618                         $wgOut->rateLimited();
 619                         wfProfileOut( "$fname-checks" );
 620                         wfProfileOut( $fname );
 621                         return false;
 622                 }
 623
 624                 # If the article has been deleted while editing, don't save it without
 625                 # confirmation
 626                 if ( $this->deletedSinceEdit && !$this->recreate ) {
 627                         wfProfileOut( "$fname-checks" );
 628                         wfProfileOut( $fname );
 629                         return true;
 630                 }
 631
 632                 wfProfileOut( "$fname-checks" );
 633
 634                 # If article is new, insert it.
 635                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 636                 if ( 0 == $aid ) {
 637                         // Late check for create permission, just in case *PARANOIA*
 638                         if ( !$this->mTitle->userCanCreate() ) {
 639                                 wfDebug( "$fname: no create permission\n" );
 640                                 $this->noCreatePermission();
 641                                 wfProfileOut( $fname );
 642                                 return;
 643                         }
 644
 645                         # Don't save a new article if it's blank.
 646                         if ( ( '' == $this->textbox1 ) ) {
 647                                         $wgOut->redirect( $this->mTitle->getFullURL() );
 648                                         wfProfileOut( $fname );
 649                                         return false;
 650                         }
 651
 652                         # If no edit comment was given when creating a new page, and what's being
 653                         # created is a redirect, be smart and fill in a neat auto-comment
 654                         if( $this->summary == '' ) {
 655                                 $rt = Title::newFromRedirect( $this->textbox1 );
 656                                 if( is_object( $rt ) )
 657                                         $this->summary = wfMsgForContent( 'autoredircomment', $rt->getPrefixedText() );
 658                         }
 659
 660                         $isComment=($this->section=='new');
 661                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 662                                 $this->minoredit, $this->watchthis, false, $isComment);
 663
 664                         wfProfileOut( $fname );
 665                         return false;
 666                 }
 667
 668                 # Article exists. Check for edit conflict.
 669
 670                 $this->mArticle->clear(); # Force reload of dates, etc.
 671                 $this->mArticle->forUpdate( true ); # Lock the article
 672
 673                 if( $this->mArticle->getTimestamp() != $this->edittime ) {
 674                         $this->isConflict = true;
 675                         if( $this->section == 'new' ) {
 676                                 if( $this->mArticle->getUserText() == $wgUser->getName() &&
 677                                         $this->mArticle->getComment() == $this->summary ) {
 678                                         // Probably a duplicate submission of a new comment.
 679                                         // This can happen when squid resends a request after
 680                                         // a timeout but the first one actually went through.
 681                                         wfDebug( "EditPage::editForm duplicate new section submission; trigger edit conflict!\n" );
 682                                 } else {
 683                                         // New comment; suppress conflict.
 684                                         $this->isConflict = false;
 685                                         wfDebug( "EditPage::editForm conflict suppressed; new section\n" );
 686                                 }
 687                         }
 688                 }
 689                 $userid = $wgUser->getID();
 690
 691                 if ( $this->isConflict) {
 692                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 693                                 $this->mArticle->getTimestamp() . "'\n" );
 694                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime);
 695                 }
 696                 else {
 697                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 698                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary);
 699                 }
 700                 if( is_null( $text ) ) {
 701                         wfDebug( "EditPage::editForm activating conflict; section replace failed.\n" );
 702                         $this->isConflict = true;
 703                         $text = $this->textbox1;
 704                 }
 705
 706                 # Suppress edit conflict with self, except for section edits where merging is required.
 707                 if ( ( $this->section == '' ) && ( 0 != $userid ) && ( $this->mArticle->getUser() == $userid ) ) {
 708                         wfDebug( "Suppressing edit conflict, same user.\n" );
 709                         $this->isConflict = false;
 710                 } else {
 711                         # switch from section editing to normal editing in edit conflict
 712                         if($this->isConflict) {
 713                                 # Attempt merge
 714                                 if( $this->mergeChangesInto( $text ) ){
 715                                         // Successful merge! Maybe we should tell the user the good news?
 716                                         $this->isConflict = false;
 717                                         wfDebug( "Suppressing edit conflict, successful merge.\n" );
 718                                 } else {
 719                                         $this->section = '';
 720                                         $this->textbox1 = $text;
 721                                         wfDebug( "Keeping edit conflict, failed merge.\n" );
 722                                 }
 723                         }
 724                 }
 725
 726                 if ( $this->isConflict ) {
 727                         wfProfileOut( $fname );
 728                         return true;
 729                 }
 730
 731                 # If no edit comment was given when turning a page into a redirect, be smart
 732                 # and fill in a neat auto-comment
 733                 if( $this->summary == '' ) {
 734                         $rt = Title::newFromRedirect( $this->textbox1 );
 735                         if( is_object( $rt ) )
 736                                 $this->summary = wfMsgForContent( 'autoredircomment', $rt->getPrefixedText() );
 737                 }
 738
 739                 # Handle the user preference to force summaries here
 740                 if( $this->section != 'new' && !$this->allowBlankSummary && $wgUser->getOption( 'forceeditsummary' ) ) {
 741                         if( md5( $this->summary ) == $this->autoSumm ) {
 742                                 $this->missingSummary = true;
 743                                 wfProfileOut( $fname );
 744                                 return( true );
 745                         }
 746                 }
 747
 748                 # All's well
 749                 wfProfileIn( "$fname-sectionanchor" );
 750                 $sectionanchor = '';
 751                 if( $this->section == 'new' ) {
 752                         if ( $this->textbox1 == '' ) {
 753                                 $this->missingComment = true;
 754                                 return true;
 755                         }
 756                         if( $this->summary != '' ) {
 757                                 $sectionanchor = $this->sectionAnchor( $this->summary );
 758                         }
 759                 } elseif( $this->section != '' ) {
 760                         # Try to get a section anchor from the section source, redirect to edited section if header found
 761                         # XXX: might be better to integrate this into Article::replaceSection
 762                         # for duplicate heading checking and maybe parsing
 763                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 764                         # we can't deal with anchors, includes, html etc in the header for now,
 765                         # headline would need to be parsed to improve this
 766                         if($hasmatch and strlen($matches[2]) > 0) {
 767                                 $sectionanchor = $this->sectionAnchor( $matches[2] );
 768                         }
 769                 }
 770                 wfProfileOut( "$fname-sectionanchor" );
 771
 772                 // Save errors may fall down to the edit form, but we've now
 773                 // merged the section into full text. Clear the section field
 774                 // so that later submission of conflict forms won't try to
 775                 // replace that into a duplicated mess.
 776                 $this->textbox1 = $text;
 777                 $this->section = '';
 778
 779                 // Check for length errors again now that the section is merged in
 780                 $this->kblength = (int)(strlen( $text ) / 1024);
 781                 if ( $this->kblength > $wgMaxArticleSize ) {
 782                         $this->tooBig = true;
 783                         wfProfileOut( $fname );
 784                         return true;
 785                 }
 786
 787                 # update the article here
 788                 if( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
 789                         $this->watchthis, '', $sectionanchor ) ) {
 790                         wfProfileOut( $fname );
 791                         return false;
 792                 } else {
 793                         $this->isConflict = true;
 794                 }
 795                 wfProfileOut( $fname );
 796                 return true;
 797         }
 798
 799         /**
 800          * Initialise form fields in the object
 801          * Called on the first invocation, e.g. when a user clicks an edit link
 802          */
 803         function initialiseForm() {
 804                 $this->edittime = $this->mArticle->getTimestamp();
 805                 $this->textbox1 = $this->getContent();
 806                 $this->summary = '';
 807                 if ( !$this->mArticle->exists() && $this->mArticle->mTitle->getNamespace() == NS_MEDIAWIKI )
 808                         $this->textbox1 = wfMsgWeirdKey( $this->mArticle->mTitle->getText() ) ;
 809                 wfProxyCheck();
 810         }
 811
 812         /**
 813          * Send the edit form and related headers to $wgOut
 814          * @param $formCallback Optional callable that takes an OutputPage
 815          *                      parameter; will be called during form output
 816          *                      near the top, for captchas and the like.
 817          */
 818         function showEditForm( $formCallback=null ) {
 819                 global $wgOut, $wgUser, $wgLang, $wgContLang, $wgMaxArticleSize;
 820
 821                 $fname = 'EditPage::showEditForm';
 822                 wfProfileIn( $fname );
 823
 824                 $sk =& $wgUser->getSkin();
 825
 826                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) ) ;
 827
 828                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 829
 830                 # Enabled article-related sidebar, toplinks, etc.
 831                 $wgOut->setArticleRelated( true );
 832
 833                 if ( $this->isConflict ) {
 834                         $s = wfMsg( 'editconflict', $this->mTitle->getPrefixedText() );
 835                         $wgOut->setPageTitle( $s );
 836                         $wgOut->addWikiText( wfMsg( 'explainconflict' ) );
 837
 838                         $this->textbox2 = $this->textbox1;
 839                         $this->textbox1 = $this->getContent();
 840                         $this->edittime = $this->mArticle->getTimestamp();
 841                 } else {
 842
 843                         if( $this->section != '' ) {
 844                                 if( $this->section == 'new' ) {
 845                                         $s = wfMsg('editingcomment', $this->mTitle->getPrefixedText() );
 846                                 } else {
 847                                         $s = wfMsg('editingsection', $this->mTitle->getPrefixedText() );
 848                                         if( !$this->preview && !$this->diff ) {
 849                                                 preg_match( "/^(=+)(.+)\\1/mi",
 850                                                         $this->textbox1,
 851                                                         $matches );
 852                                                 if( !empty( $matches[2] ) ) {
 853                                                         $this->summary = "/* ". trim($matches[2])." */ ";
 854                                                 }
 855                                         }
 856                                 }
 857                         } else {
 858                                 $s = wfMsg( 'editing', $this->mTitle->getPrefixedText() );
 859                         }
 860                         $wgOut->setPageTitle( $s );
 861
 862                         if ( $this->missingComment ) {
 863                                 $wgOut->addWikiText( wfMsg( 'missingcommenttext' ) );
 864                         }
 865
 866                         if( $this->missingSummary ) {
 867                                 $wgOut->addWikiText( wfMsg( 'missingsummary' ) );
 868                         }
 869
 870                         if( !$this->hookError == '' ) {
 871                                 $wgOut->addWikiText( $this->hookError );
 872                         }
 873
 874                         if ( !$this->checkUnicodeCompliantBrowser() ) {
 875                                 $wgOut->addWikiText( wfMsg( 'nonunicodebrowser') );
 876                         }
 877                         if ( isset( $this->mArticle )
 878                              && isset( $this->mArticle->mRevision )
 879                              && !$this->mArticle->mRevision->isCurrent() ) {
 880                                 $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
 881                                 $wgOut->addWikiText( wfMsg( 'editingold' ) );
 882                         }
 883                 }
 884
 885                 if( wfReadOnly() ) {
 886                         $wgOut->addWikiText( wfMsg( 'readonlywarning' ) );
 887                 } elseif( $wgUser->isAnon() && $this->formtype != 'preview' ) {
 888                         $wgOut->addWikiText( wfMsg( 'anoneditwarning' ) );
 889                 } else {
 890                         if( $this->isCssJsSubpage && $this->formtype != 'preview' ) {
 891                                 # Check the skin exists
 892                                 if( $this->isValidCssJsSubpage ) {
 893                                         $wgOut->addWikiText( wfMsg( 'usercssjsyoucanpreview' ) );
 894                                 } else {
 895                                         $wgOut->addWikiText( wfMsg( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
 896                                 }
 897                         }
 898                 }
 899
 900                 if( $this->mTitle->isProtected( 'edit' ) ) {
 901                         # Is the protection due to the namespace, e.g. interface text?
 902                         if( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 903                                 # Yes; remind the user
 904                                 $notice = wfMsg( 'editinginterface' );
 905                         } elseif( $this->mTitle->isSemiProtected() ) {
 906                                 # No; semi protected
 907                                 $notice = wfMsg( 'semiprotectedpagewarning' );
 908                                 if( wfEmptyMsg( 'semiprotectedpagewarning', $notice ) || $notice == '-' ) {
 909                                         $notice = '';
 910                                 }
 911                         } else {
 912                                 # No; regular protection
 913                                 $notice = wfMsg( 'protectedpagewarning' );
 914                         }
 915                         $wgOut->addWikiText( $notice );
 916                 }
 917
 918                 if ( $this->kblength === false ) {
 919                         $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 920                 }
 921                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
 922                         $wgOut->addWikiText( wfMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgMaxArticleSize ) );
 923                 } elseif( $this->kblength > 29 ) {
 924                         $wgOut->addWikiText( wfMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) ) );
 925                 }
 926
 927                 $rows = $wgUser->getIntOption( 'rows' );
 928                 $cols = $wgUser->getIntOption( 'cols' );
 929
 930                 $ew = $wgUser->getOption( 'editwidth' );
 931                 if ( $ew ) $ew = " style=\"width:100%\"";
 932                 else $ew = '';
 933
 934                 $q = 'action=submit';
 935                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
 936                 $action = $this->mTitle->escapeLocalURL( $q );
 937
 938                 $summary = wfMsg('summary');
 939                 $subject = wfMsg('subject');
 940                 $minor   = wfMsgExt('minoredit', array('parseinline'));
 941                 $watchthis = wfMsgExt('watchthis', array('parseinline'));
 942
 943                 $cancel = $sk->makeKnownLink( $this->mTitle->getPrefixedText(),
 944                                 wfMsgExt('cancel', array('parseinline')) );
 945                 $edithelpurl = $sk->makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ));
 946                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
 947                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
 948                         htmlspecialchars( wfMsg( 'newwindow' ) );
 949
 950                 global $wgRightsText;
 951                 $copywarn = "<div id=\"editpage-copywarn\">\n" .
 952                         wfMsg( $wgRightsText ? 'copyrightwarning' : 'copyrightwarning2',
 953                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
 954                                 $wgRightsText ) . "\n</div>";
 955
 956                 if( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
 957                         # prepare toolbar for edit buttons
 958                         $toolbar = $this->getEditToolbar();
 959                 } else {
 960                         $toolbar = '';
 961                 }
 962
 963                 // activate checkboxes if user wants them to be always active
 964                 if( !$this->preview && !$this->diff ) {
 965                         # Sort out the "watch" checkbox
 966                         if( $wgUser->getOption( 'watchdefault' ) ) {
 967                                 # Watch all edits
 968                                 $this->watchthis = true;
 969                         } elseif( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 970                                 # Watch creations
 971                                 $this->watchthis = true;
 972                         } elseif( $this->mTitle->userIsWatching() ) {
 973                                 # Already watched
 974                                 $this->watchthis = true;
 975                         }
 976
 977                         if( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
 978                 }
 979
 980                 $minoredithtml = '';
 981
 982                 if ( $wgUser->isAllowed('minoredit') ) {
 983                         $minoredithtml =
 984                                 "<input tabindex='3' type='checkbox' value='1' name='wpMinoredit'".($this->minoredit?" checked='checked'":"").
 985                                 " accesskey='".wfMsg('accesskey-minoredit')."' id='wpMinoredit' />\n".
 986                                 "<label for='wpMinoredit' title='".wfMsg('tooltip-minoredit')."'>{$minor}</label>\n";
 987                 }
 988
 989                 $watchhtml = '';
 990
 991                 if ( $wgUser->isLoggedIn() ) {
 992                         $watchhtml = "<input tabindex='4' type='checkbox' name='wpWatchthis'".
 993                                 ($this->watchthis?" checked='checked'":"").
 994                                 " accesskey=\"".htmlspecialchars(wfMsg('accesskey-watch'))."\" id='wpWatchthis'  />\n".
 995                                 "<label for='wpWatchthis' title=\"" .
 996                                         htmlspecialchars(wfMsg('tooltip-watch'))."\">{$watchthis}</label>\n";
 997                 }
 998
 999                 $checkboxhtml = $minoredithtml . $watchhtml;
1000
1001                 if ( $wgUser->getOption( 'previewontop' ) ) {
1002
1003                         if ( 'preview' == $this->formtype ) {
1004                                 $this->showPreview();
1005                         } else {
1006                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
1007                         }
1008
1009                         if ( 'diff' == $this->formtype ) {
1010                                 $wgOut->addHTML( $this->getDiff() );
1011                         }
1012                 }
1013
1014
1015                 # if this is a comment, show a subject line at the top, which is also the edit summary.
1016                 # Otherwise, show a summary field at the bottom
1017                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
1018                 if( $this->section == 'new' ) {
1019                         $commentsubject="<span id='wpSummaryLabel'><label for='wpSummary'>{$subject}:</label></span>\n<div class='editOptions'>\n<input tabindex='1' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
1020                         $editsummary = '';
1021                 } else {
1022                         $commentsubject = '';
1023                         $editsummary="<span id='wpSummaryLabel'><label for='wpSummary'>{$summary}:</label></span>\n<div class='editOptions'>\n<input tabindex='2' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
1024                 }
1025
1026                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
1027                 if( !$this->preview && !$this->diff ) {
1028                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
1029                 }
1030                 $templates = $this->formatTemplates();
1031
1032                 global $wgUseMetadataEdit ;
1033                 if ( $wgUseMetadataEdit ) {
1034                         $metadata = $this->mMetaData ;
1035                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
1036                         $top = wfMsgWikiHtml( 'metadata_help' );
1037                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
1038                 }
1039                 else $metadata = "" ;
1040
1041                 $hidden = '';
1042                 $recreate = '';
1043                 if ($this->deletedSinceEdit) {
1044                         if ( 'save' != $this->formtype ) {
1045                                 $wgOut->addWikiText( wfMsg('deletedwhileediting'));
1046                         } else {
1047                                 // Hide the toolbar and edit area, use can click preview to get it back
1048                                 // Add an confirmation checkbox and explanation.
1049                                 $toolbar = '';
1050                                 $hidden = 'type="hidden" style="display:none;"';
1051                                 $recreate = $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ));
1052                                 $recreate .=
1053                                         "<br /><input tabindex='1' type='checkbox' value='1' name='wpRecreate' id='wpRecreate' />".
1054                                         "<label for='wpRecreate' title='".wfMsg('tooltip-recreate')."'>". wfMsg('recreate')."</label>";
1055                         }
1056                 }
1057
1058                 $temp = array(
1059                         'id'        => 'wpSave',
1060                         'name'      => 'wpSave',
1061                         'type'      => 'submit',
1062                         'tabindex'  => '5',
1063                         'value'     => wfMsg('savearticle'),
1064                         'accesskey' => wfMsg('accesskey-save'),
1065                         'title'     => wfMsg('tooltip-save'),
1066                 );
1067                 $buttons['save'] = wfElement('input', $temp, '');
1068                 $temp = array(
1069                         'id'        => 'wpDiff',
1070                         'name'      => 'wpDiff',
1071                         'type'      => 'submit',
1072                         'tabindex'  => '7',
1073                         'value'     => wfMsg('showdiff'),
1074                         'accesskey' => wfMsg('accesskey-diff'),
1075                         'title'     => wfMsg('tooltip-diff'),
1076                 );
1077                 $buttons['diff'] = wfElement('input', $temp, '');
1078
1079                 global $wgLivePreview;
1080                 if ( $wgLivePreview && $wgUser->getOption( 'uselivepreview' ) ) {
1081                         $temp = array(
1082                                 'id'        => 'wpPreview',
1083                                 'name'      => 'wpPreview',
1084                                 'type'      => 'submit',
1085                                 'tabindex'  => '6',
1086                                 'value'     => wfMsg('showpreview'),
1087                                 'accesskey' => '',
1088                                 'title'     => wfMsg('tooltip-preview'),
1089                                 'style'     => 'display: none;',
1090                         );
1091                         $buttons['preview'] = wfElement('input', $temp, '');
1092                         $temp = array(
1093                                 'id'        => 'wpLivePreview',
1094                                 'name'      => 'wpLivePreview',
1095                                 'type'      => 'submit',
1096                                 'tabindex'  => '6',
1097                                 'value'     => wfMsg('showlivepreview'),
1098                                 'accesskey' => wfMsg('accesskey-preview'),
1099                                 'title'     => '',
1100                                 'onclick'   => $this->doLivePreviewScript(),
1101                         );
1102                         $buttons['live'] = wfElement('input', $temp, '');
1103                 } else {
1104                         $temp = array(
1105                                 'id'        => 'wpPreview',
1106                                 'name'      => 'wpPreview',
1107                                 'type'      => 'submit',
1108                                 'tabindex'  => '6',
1109                                 'value'     => wfMsg('showpreview'),
1110                                 'accesskey' => wfMsg('accesskey-preview'),
1111                                 'title'     => wfMsg('tooltip-preview'),
1112                         );
1113                         $buttons['preview'] = wfElement('input', $temp, '');
1114                         $buttons['live'] = '';
1115                 }
1116
1117                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
1118                         ? ""
1119                         : "<input type='hidden' name=\"safemode\" value='1' />\n";
1120
1121                 $wgOut->addHTML( <<<END
1122 {$toolbar}
1123 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1124 END
1125 );
1126
1127                 if( is_callable( $formCallback ) ) {
1128                         call_user_func_array( $formCallback, array( &$wgOut ) );
1129                 }
1130
1131                 // Put these up at the top to ensure they aren't lost on early form submission
1132                 $wgOut->addHTML( "
1133 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
1134 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
1135 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
1136 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
1137
1138                 $wgOut->addHTML( <<<END
1139 $recreate
1140 {$commentsubject}
1141 <textarea tabindex='1' accesskey="," name="wpTextbox1" id="wpTextbox1" rows='{$rows}'
1142 cols='{$cols}'{$ew} $hidden>
1143 END
1144 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox1 ) ) .
1145 "
1146 </textarea>
1147                 " );
1148
1149                 $wgOut->addWikiText( $copywarn );
1150                 $wgOut->addHTML( "
1151 {$metadata}
1152 {$editsummary}
1153 {$checkboxhtml}
1154 {$safemodehtml}
1155 ");
1156
1157                 $wgOut->addHTML(
1158 "<div class='editButtons'>
1159         {$buttons['save']}
1160         {$buttons['preview']}
1161         {$buttons['live']}
1162         {$buttons['diff']}
1163         <span class='editHelp'>{$cancel} | {$edithelp}</span>
1164 </div><!-- editButtons -->
1165 </div><!-- editOptions -->");
1166
1167                 $wgOut->addWikiText( wfMsgForContent( 'edittools' ) );
1168
1169                 $wgOut->addHTML( "
1170 <div class='templatesUsed'>
1171 {$templates}
1172 </div>
1173 " );
1174
1175                 if ( $wgUser->isLoggedIn() ) {
1176                         /**
1177                          * To make it harder for someone to slip a user a page
1178                          * which submits an edit form to the wiki without their
1179                          * knowledge, a random token is associated with the login
1180                          * session. If it's not passed back with the submission,
1181                          * we won't save the page, or render user JavaScript and
1182                          * CSS previews.
1183                          */
1184                         $token = htmlspecialchars( $wgUser->editToken() );
1185                         $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
1186                 }
1187
1188                 # If a blank edit summary was previously provided, and the appropriate
1189                 # user preference is active, pass a hidden tag here. This will stop the
1190                 # user being bounced back more than once in the event that a summary
1191                 # is not required.
1192                 if( $this->missingSummary ) {
1193                         $wgOut->addHTML( "<input type=\"hidden\" name=\"wpIgnoreBlankSummary\" value=\"1\" />\n" );
1194                 }
1195
1196                 # For a bit more sophisticated detection of blank summaries, hash the
1197                 # automatic one and pass that in a hidden field.
1198                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1199                 $wgOut->addHtml( wfHidden( 'wpAutoSummary', $autosumm ) );
1200
1201                 if ( $this->isConflict ) {
1202                         require_once( "DifferenceEngine.php" );
1203                         $wgOut->addWikiText( '==' . wfMsg( "yourdiff" ) . '==' );
1204
1205                         $de = new DifferenceEngine( $this->mTitle );
1206                         $de->setText( $this->textbox2, $this->textbox1 );
1207                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1208
1209                         $wgOut->addWikiText( '==' . wfMsg( "yourtext" ) . '==' );
1210                         $wgOut->addHTML( "<textarea tabindex=6 id='wpTextbox2' name=\"wpTextbox2\" rows='{$rows}' cols='{$cols}' wrap='virtual'>"
1211                                 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox2 ) ) . "\n</textarea>" );
1212                 }
1213                 $wgOut->addHTML( "</form>\n" );
1214                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1215
1216                         if ( $this->formtype == 'preview') {
1217                                 $this->showPreview();
1218                         } else {
1219                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
1220                         }
1221
1222                         if ( $this->formtype == 'diff') {
1223                                 $wgOut->addHTML( $this->getDiff() );
1224                         }
1225
1226                 }
1227
1228                 wfProfileOut( $fname );
1229         }
1230
1231         /**
1232          * Append preview output to $wgOut.
1233          * Includes category rendering if this is a category page.
1234          * @private
1235          */
1236         function showPreview() {
1237                 global $wgOut;
1238                 $wgOut->addHTML( '<div id="wikiPreview">' );
1239                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1240                         $this->mArticle->openShowCategory();
1241                 }
1242                 $previewOutput = $this->getPreviewText();
1243                 $wgOut->addHTML( $previewOutput );
1244                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1245                         $this->mArticle->closeShowCategory();
1246                 }
1247                 $wgOut->addHTML( "<br style=\"clear:both;\" />\n" );
1248                 $wgOut->addHTML( '</div>' );
1249         }
1250
1251         /**
1252          * Prepare a list of templates used by this page. Returns HTML.
1253          */
1254         function formatTemplates() {
1255                 global $wgUser;
1256
1257                 $fname = 'EditPage::formatTemplates';
1258                 wfProfileIn( $fname );
1259
1260                 $sk =& $wgUser->getSkin();
1261
1262                 $outText = '';
1263                 $templates = $this->mArticle->getUsedTemplates();
1264                 if ( count( $templates ) > 0 ) {
1265                         # Do a batch existence check
1266                         $batch = new LinkBatch;
1267                         foreach( $templates as $title ) {
1268                                 $batch->addObj( $title );
1269                         }
1270                         $batch->execute();
1271
1272                         # Construct the HTML
1273                         $outText = '<br />'. wfMsgExt( 'templatesused', array( 'parseinline' ) ) . '<ul>';
1274                         foreach ( $templates as $titleObj ) {
1275                                 $outText .= '<li>' . $sk->makeLinkObj( $titleObj ) . '</li>';
1276                         }
1277                         $outText .= '</ul>';
1278                 }
1279                 wfProfileOut( $fname );
1280                 return $outText;
1281         }
1282
1283         /**
1284          * Live Preview lets us fetch rendered preview page content and
1285          * add it to the page without refreshing the whole page.
1286          * If not supported by the browser it will fall through to the normal form
1287          * submission method.
1288          *
1289          * This function outputs a script tag to support live preview, and
1290          * returns an onclick handler which should be added to the attributes
1291          * of the preview button
1292          */
1293         function doLivePreviewScript() {
1294                 global $wgStylePath, $wgJsMimeType, $wgOut, $wgTitle;
1295                 $wgOut->addHTML( '<script type="'.$wgJsMimeType.'" src="' .
1296                         htmlspecialchars( $wgStylePath . '/common/preview.js' ) .
1297                         '"></script>' . "\n" );
1298                 $liveAction = $wgTitle->getLocalUrl( 'action=submit&wpPreview=true&live=true' );
1299                 return "return !livePreview(" .
1300                         "getElementById('wikiPreview')," .
1301                         "editform.wpTextbox1.value," .
1302                         '"' . $liveAction . '"' . ")";
1303         }
1304
1305         function getLastDelete() {
1306                 $dbr =& wfGetDB( DB_SLAVE );
1307                 $fname = 'EditPage::getLastDelete';
1308                 $res = $dbr->select(
1309                         array( 'logging', 'user' ),
1310                         array( 'log_type',
1311                                'log_action',
1312                                'log_timestamp',
1313                                'log_user',
1314                                'log_namespace',
1315                                'log_title',
1316                                'log_comment',
1317                                'log_params',
1318                                'user_name', ),
1319                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1320                                'log_title' => $this->mTitle->getDBkey(),
1321                                'log_type' => 'delete',
1322                                'log_action' => 'delete',
1323                                'user_id=log_user' ),
1324                         $fname,
1325                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
1326
1327                 if($dbr->numRows($res) == 1) {
1328                         while ( $x = $dbr->fetchObject ( $res ) )
1329                                 $data = $x;
1330                         $dbr->freeResult ( $res ) ;
1331                 } else {
1332                         $data = null;
1333                 }
1334                 return $data;
1335         }
1336
1337         /**
1338          * @todo document
1339          */
1340         function getPreviewText() {
1341                 global $wgOut, $wgUser, $wgTitle, $wgParser;
1342
1343                 $fname = 'EditPage::getPreviewText';
1344                 wfProfileIn( $fname );
1345
1346                 if ( $this->mTriedSave && !$this->mTokenOk ) {
1347                         $msg = 'session_fail_preview';
1348                 } else {
1349                         $msg = 'previewnote';
1350                 }
1351                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
1352                         "<div class='previewnote'>" . $wgOut->parse( wfMsg( $msg ) ) . "</div>\n";
1353                 if ( $this->isConflict ) {
1354                         $previewhead.='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1355                 }
1356
1357                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1358                 $parserOptions->setEditSection( false );
1359
1360                 global $wgRawHtml;
1361                 if( $wgRawHtml && !$this->mTokenOk ) {
1362                         // Could be an offsite preview attempt. This is very unsafe if
1363                         // HTML is enabled, as it could be an attack.
1364                         return $wgOut->parse( "<div class='previewnote'>" .
1365                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1366                 }
1367
1368                 # don't parse user css/js, show message about preview
1369                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1370
1371                 if ( $this->isCssJsSubpage ) {
1372                         if(preg_match("/\\.css$/", $wgTitle->getText() ) ) {
1373                                 $previewtext = wfMsg('usercsspreview');
1374                         } else if(preg_match("/\\.js$/", $wgTitle->getText() ) ) {
1375                                 $previewtext = wfMsg('userjspreview');
1376                         }
1377                         $parserOptions->setTidy(true);
1378                         $parserOutput = $wgParser->parse( $previewtext , $wgTitle, $parserOptions );
1379                         $wgOut->addHTML( $parserOutput->mText );
1380                         wfProfileOut( $fname );
1381                         return $previewhead;
1382                 } else {
1383                         # if user want to see preview when he edit an article
1384                         if( $wgUser->getOption('previewonfirst') and ($this->textbox1 == '')) {
1385                                 $this->textbox1 = $this->getContent();
1386                         }
1387
1388                         $toparse = $this->textbox1;
1389
1390                         # If we're adding a comment, we need to show the
1391                         # summary as the headline
1392                         if($this->section=="new" && $this->summary!="") {
1393                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1394                         }
1395
1396                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData ;
1397                         $parserOptions->setTidy(true);
1398                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ) ."\n\n",
1399                                         $wgTitle, $parserOptions );
1400
1401                         $previewHTML = $parserOutput->getText();
1402                         $wgOut->addParserOutputNoText( $parserOutput );
1403
1404                         wfProfileOut( $fname );
1405                         return $previewhead . $previewHTML;
1406                 }
1407         }
1408
1409         /**
1410          * Call the stock "user is blocked" page
1411          */
1412         function blockedPage() {
1413                 global $wgOut, $wgUser;
1414                 $wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
1415
1416                 # If the user made changes, preserve them when showing the markup
1417                 # (This happens when a user is blocked during edit, for instance)
1418                 $first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
1419                 if( $first ) {
1420                         $source = $this->mTitle->exists() ? $this->getContent() : false;
1421                 } else {
1422                         $source = $this->textbox1;
1423                 }
1424
1425                 # Spit out the source or the user's modified version
1426                 if( $source !== false ) {
1427                         $rows = $wgUser->getOption( 'rows' );
1428                         $cols = $wgUser->getOption( 'cols' );
1429                         $attribs = array( 'id' => 'wpTextbox1', 'name' => 'wpTextbox1', 'cols' => $cols, 'rows' => $rows, 'readonly' => 'readonly' );
1430                         $wgOut->addHtml( '<hr />' );
1431                         $wgOut->addWikiText( wfMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() ) );
1432                         $wgOut->addHtml( wfElement( 'textarea', $attribs, $source ) );
1433                 }
1434         }
1435
1436         /**
1437          * Produce the stock "please login to edit pages" page
1438          */
1439         function userNotLoggedInPage() {
1440                 global $wgUser, $wgOut;
1441                 $skin = $wgUser->getSkin();
1442
1443                 $loginTitle = Title::makeTitle( NS_SPECIAL, 'Userlogin' );
1444                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $this->mTitle->getPrefixedUrl() );
1445
1446                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1447                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1448                 $wgOut->setArticleRelated( false );
1449
1450                 $wgOut->addHtml( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
1451                 $wgOut->returnToMain( false, $this->mTitle->getPrefixedUrl() );
1452         }
1453
1454         /**
1455          * Creates a basic error page which informs the user that
1456          * they have to validate their email address before being
1457          * allowed to edit.
1458          */
1459         function userNotConfirmedPage() {
1460                 global $wgOut;
1461
1462                 $wgOut->setPageTitle( wfMsg( 'confirmedittitle' ) );
1463                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1464                 $wgOut->setArticleRelated( false );
1465
1466                 $wgOut->addWikiText( wfMsg( 'confirmedittext' ) );
1467                 $wgOut->returnToMain( false );
1468         }
1469
1470         /**
1471          * Produce the stock "your edit contains spam" page
1472          *
1473          * @param $match Text which triggered one or more filters
1474          */
1475         function spamPage( $match = false ) {
1476                 global $wgOut;
1477
1478                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1479                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1480                 $wgOut->setArticleRelated( false );
1481
1482                 $wgOut->addWikiText( wfMsg( 'spamprotectiontext' ) );
1483                 if ( $match )
1484                         $wgOut->addWikiText( wfMsg( 'spamprotectionmatch', "<nowiki>{$match}</nowiki>" ) );
1485
1486                 $wgOut->returnToMain( false );
1487         }
1488
1489         /**
1490          * @private
1491          * @todo document
1492          */
1493         function mergeChangesInto( &$editText ){
1494                 $fname = 'EditPage::mergeChangesInto';
1495                 wfProfileIn( $fname );
1496
1497                 $db =& wfGetDB( DB_MASTER );
1498
1499                 // This is the revision the editor started from
1500                 $baseRevision = Revision::loadFromTimestamp(
1501                         $db, $this->mArticle->mTitle, $this->edittime );
1502                 if( is_null( $baseRevision ) ) {
1503                         wfProfileOut( $fname );
1504                         return false;
1505                 }
1506                 $baseText = $baseRevision->getText();
1507
1508                 // The current state, we want to merge updates into it
1509                 $currentRevision =  Revision::loadFromTitle(
1510                         $db, $this->mArticle->mTitle );
1511                 if( is_null( $currentRevision ) ) {
1512                         wfProfileOut( $fname );
1513                         return false;
1514                 }
1515                 $currentText = $currentRevision->getText();
1516
1517                 if( wfMerge( $baseText, $editText, $currentText, $result ) ){
1518                         $editText = $result;
1519                         wfProfileOut( $fname );
1520                         return true;
1521                 } else {
1522                         wfProfileOut( $fname );
1523                         return false;
1524                 }
1525         }
1526
1527         /**
1528          * Check if the browser is on a blacklist of user-agents known to
1529          * mangle UTF-8 data on form submission. Returns true if Unicode
1530          * should make it through, false if it's known to be a problem.
1531          * @return bool
1532          * @private
1533          */
1534         function checkUnicodeCompliantBrowser() {
1535                 global $wgBrowserBlackList;
1536                 if( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
1537                         // No User-Agent header sent? Trust it by default...
1538                         return true;
1539                 }
1540                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1541                 foreach ( $wgBrowserBlackList as $browser ) {
1542                         if ( preg_match($browser, $currentbrowser) ) {
1543                                 return false;
1544                         }
1545                 }
1546                 return true;
1547         }
1548
1549         /**
1550          * Format an anchor fragment as it would appear for a given section name
1551          * @param string $text
1552          * @return string
1553          * @private
1554          */
1555         function sectionAnchor( $text ) {
1556                 $headline = Sanitizer::decodeCharReferences( $text );
1557                 # strip out HTML
1558                 $headline = preg_replace( '/<.*?' . '>/', '', $headline );
1559                 $headline = trim( $headline );
1560                 $sectionanchor = '#' . urlencode( str_replace( ' ', '_', $headline ) );
1561                 $replacearray = array(
1562                         '%3A' => ':',
1563                         '%' => '.'
1564                 );
1565                 return str_replace(
1566                         array_keys( $replacearray ),
1567                         array_values( $replacearray ),
1568                         $sectionanchor );
1569         }
1570
1571         /**
1572          * Shows a bulletin board style toolbar for common editing functions.
1573          * It can be disabled in the user preferences.
1574          * The necessary JavaScript code can be found in style/wikibits.js.
1575          */
1576         function getEditToolbar() {
1577                 global $wgStylePath, $wgContLang, $wgJsMimeType;
1578
1579                 /**
1580                  * toolarray an array of arrays which each include the filename of
1581                  * the button image (without path), the opening tag, the closing tag,
1582                  * and optionally a sample text that is inserted between the two when no
1583                  * selection is highlighted.
1584                  * The tip text is shown when the user moves the mouse over the button.
1585                  *
1586                  * Already here are accesskeys (key), which are not used yet until someone
1587                  * can figure out a way to make them work in IE. However, we should make
1588                  * sure these keys are not defined on the edit page.
1589                  */
1590                 $toolarray=array(
1591                         array(  'image'=>'button_bold.png',
1592                                         'open'  =>      "\'\'\'",
1593                                         'close' =>      "\'\'\'",
1594                                         'sample'=>      wfMsg('bold_sample'),
1595                                         'tip'   =>      wfMsg('bold_tip'),
1596                                         'key'   =>      'B'
1597                                 ),
1598                         array(  'image'=>'button_italic.png',
1599                                         'open'  =>      "\'\'",
1600                                         'close' =>      "\'\'",
1601                                         'sample'=>      wfMsg('italic_sample'),
1602                                         'tip'   =>      wfMsg('italic_tip'),
1603                                         'key'   =>      'I'
1604                                 ),
1605                         array(  'image'=>'button_link.png',
1606                                         'open'  =>      '[[',
1607                                         'close' =>      ']]',
1608                                         'sample'=>      wfMsg('link_sample'),
1609                                         'tip'   =>      wfMsg('link_tip'),
1610                                         'key'   =>      'L'
1611                                 ),
1612                         array(  'image'=>'button_extlink.png',
1613                                         'open'  =>      '[',
1614                                         'close' =>      ']',
1615                                         'sample'=>      wfMsg('extlink_sample'),
1616                                         'tip'   =>      wfMsg('extlink_tip'),
1617                                         'key'   =>      'X'
1618                                 ),
1619                         array(  'image'=>'button_headline.png',
1620                                         'open'  =>      "\\n== ",
1621                                         'close' =>      " ==\\n",
1622                                         'sample'=>      wfMsg('headline_sample'),
1623                                         'tip'   =>      wfMsg('headline_tip'),
1624                                         'key'   =>      'H'
1625                                 ),
1626                         array(  'image'=>'button_image.png',
1627                                         'open'  =>      '[['.$wgContLang->getNsText(NS_IMAGE).":",
1628                                         'close' =>      ']]',
1629                                         'sample'=>      wfMsg('image_sample'),
1630                                         'tip'   =>      wfMsg('image_tip'),
1631                                         'key'   =>      'D'
1632                                 ),
1633                         array(  'image' =>'button_media.png',
1634                                         'open'  =>      '[['.$wgContLang->getNsText(NS_MEDIA).':',
1635                                         'close' =>      ']]',
1636                                         'sample'=>      wfMsg('media_sample'),
1637                                         'tip'   =>      wfMsg('media_tip'),
1638                                         'key'   =>      'M'
1639                                 ),
1640                         array(  'image' =>'button_math.png',
1641                                         'open'  =>      "<math>",
1642                                         'close' =>      "<\\/math>",
1643                                         'sample'=>      wfMsg('math_sample'),
1644                                         'tip'   =>      wfMsg('math_tip'),
1645                                         'key'   =>      'C'
1646                                 ),
1647                         array(  'image' =>'button_nowiki.png',
1648                                         'open'  =>      "<nowiki>",
1649                                         'close' =>      "<\\/nowiki>",
1650                                         'sample'=>      wfMsg('nowiki_sample'),
1651                                         'tip'   =>      wfMsg('nowiki_tip'),
1652                                         'key'   =>      'N'
1653                                 ),
1654                         array(  'image' =>'button_sig.png',
1655                                         'open'  =>      '--~~~~',
1656                                         'close' =>      '',
1657                                         'sample'=>      '',
1658                                         'tip'   =>      wfMsg('sig_tip'),
1659                                         'key'   =>      'Y'
1660                                 ),
1661                         array(  'image' =>'button_hr.png',
1662                                         'open'  =>      "\\n----\\n",
1663                                         'close' =>      '',
1664                                         'sample'=>      '',
1665                                         'tip'   =>      wfMsg('hr_tip'),
1666                                         'key'   =>      'R'
1667                                 )
1668                 );
1669                 $toolbar = "<div id='toolbar'>\n";
1670                 $toolbar.="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
1671
1672                 foreach($toolarray as $tool) {
1673
1674                         $image=$wgStylePath.'/common/images/'.$tool['image'];
1675                         $open=$tool['open'];
1676                         $close=$tool['close'];
1677                         $sample = wfEscapeJsString( $tool['sample'] );
1678
1679                         // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
1680                         // Older browsers show a "speedtip" type message only for ALT.
1681                         // Ideally these should be different, realistically they
1682                         // probably don't need to be.
1683                         $tip = wfEscapeJsString( $tool['tip'] );
1684
1685                         #$key = $tool["key"];
1686
1687                         $toolbar.="addButton('$image','$tip','$open','$close','$sample');\n";
1688                 }
1689
1690                 $toolbar.="/*]]>*/\n</script>";
1691                 $toolbar.="\n</div>";
1692                 return $toolbar;
1693         }
1694
1695         /**
1696          * Output preview text only. This can be sucked into the edit page
1697          * via JavaScript, and saves the server time rendering the skin as
1698          * well as theoretically being more robust on the client (doesn't
1699          * disturb the edit box's undo history, won't eat your text on
1700          * failure, etc).
1701          *
1702          * @todo This doesn't include category or interlanguage links.
1703          *       Would need to enhance it a bit, maybe wrap them in XML
1704          *       or something... that might also require more skin
1705          *       initialization, so check whether that's a problem.
1706          */
1707         function livePreview() {
1708                 global $wgOut;
1709                 $wgOut->disable();
1710                 header( 'Content-type: text/xml' );
1711                 header( 'Cache-control: no-cache' );
1712                 # FIXME
1713                 echo $this->getPreviewText( );
1714                 /* To not shake screen up and down between preview and live-preview */
1715                 echo "<br style=\"clear:both;\" />\n";
1716         }
1717
1718
1719         /**
1720          * Get a diff between the current contents of the edit box and the
1721          * version of the page we're editing from.
1722          *
1723          * If this is a section edit, we'll replace the section as for final
1724          * save and then make a comparison.
1725          *
1726          * @return string HTML
1727          */
1728         function getDiff() {
1729                 require_once( 'DifferenceEngine.php' );
1730                 $oldtext = $this->mArticle->fetchContent();
1731                 $newtext = $this->mArticle->replaceSection(
1732                         $this->section, $this->textbox1, $this->summary, $this->edittime );
1733                 $newtext = $this->mArticle->preSaveTransform( $newtext );
1734                 $oldtitle = wfMsgExt( 'currentrev', array('parseinline') );
1735                 $newtitle = wfMsgExt( 'yourtext', array('parseinline') );
1736                 if ( $oldtext !== false  || $newtext != '' ) {
1737                         $de = new DifferenceEngine( $this->mTitle );
1738                         $de->setText( $oldtext, $newtext );
1739                         $difftext = $de->getDiff( $oldtitle, $newtitle );
1740                 } else {
1741                         $difftext = '';
1742                 }
1743
1744                 return '<div id="wikiDiff">' . $difftext . '</div>';
1745         }
1746
1747         /**
1748          * Filter an input field through a Unicode de-armoring process if it
1749          * came from an old browser with known broken Unicode editing issues.
1750          *
1751          * @param WebRequest $request
1752          * @param string $field
1753          * @return string
1754          * @private
1755          */
1756         function safeUnicodeInput( $request, $field ) {
1757                 $text = rtrim( $request->getText( $field ) );
1758                 return $request->getBool( 'safemode' )
1759                         ? $this->unmakesafe( $text )
1760                         : $text;
1761         }
1762
1763         /**
1764          * Filter an output field through a Unicode armoring process if it is
1765          * going to an old browser with known broken Unicode editing issues.
1766          *
1767          * @param string $text
1768          * @return string
1769          * @private
1770          */
1771         function safeUnicodeOutput( $text ) {
1772                 global $wgContLang;
1773                 $codedText = $wgContLang->recodeForEdit( $text );
1774                 return $this->checkUnicodeCompliantBrowser()
1775                         ? $codedText
1776                         : $this->makesafe( $codedText );
1777         }
1778
1779         /**
1780          * A number of web browsers are known to corrupt non-ASCII characters
1781          * in a UTF-8 text editing environment. To protect against this,
1782          * detected browsers will be served an armored version of the text,
1783          * with non-ASCII chars converted to numeric HTML character references.
1784          *
1785          * Preexisting such character references will have a 0 added to them
1786          * to ensure that round-trips do not alter the original data.
1787          *
1788          * @param string $invalue
1789          * @return string
1790          * @private
1791          */
1792         function makesafe( $invalue ) {
1793                 // Armor existing references for reversability.
1794                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
1795
1796                 $bytesleft = 0;
1797                 $result = "";
1798                 $working = 0;
1799                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1800                         $bytevalue = ord( $invalue{$i} );
1801                         if( $bytevalue <= 0x7F ) { //0xxx xxxx
1802                                 $result .= chr( $bytevalue );
1803                                 $bytesleft = 0;
1804                         } elseif( $bytevalue <= 0xBF ) { //10xx xxxx
1805                                 $working = $working << 6;
1806                                 $working += ($bytevalue & 0x3F);
1807                                 $bytesleft--;
1808                                 if( $bytesleft <= 0 ) {
1809                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
1810                                 }
1811                         } elseif( $bytevalue <= 0xDF ) { //110x xxxx
1812                                 $working = $bytevalue & 0x1F;
1813                                 $bytesleft = 1;
1814                         } elseif( $bytevalue <= 0xEF ) { //1110 xxxx
1815                                 $working = $bytevalue & 0x0F;
1816                                 $bytesleft = 2;
1817                         } else { //1111 0xxx
1818                                 $working = $bytevalue & 0x07;
1819                                 $bytesleft = 3;
1820                         }
1821                 }
1822                 return $result;
1823         }
1824
1825         /**
1826          * Reverse the previously applied transliteration of non-ASCII characters
1827          * back to UTF-8. Used to protect data from corruption by broken web browsers
1828          * as listed in $wgBrowserBlackList.
1829          *
1830          * @param string $invalue
1831          * @return string
1832          * @private
1833          */
1834         function unmakesafe( $invalue ) {
1835                 $result = "";
1836                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1837                         if( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
1838                                 $i += 3;
1839                                 $hexstring = "";
1840                                 do {
1841                                         $hexstring .= $invalue{$i};
1842                                         $i++;
1843                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
1844
1845                                 // Do some sanity checks. These aren't needed for reversability,
1846                                 // but should help keep the breakage down if the editor
1847                                 // breaks one of the entities whilst editing.
1848                                 if ((substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6)) {
1849                                         $codepoint = hexdec($hexstring);
1850                                         $result .= codepointToUtf8( $codepoint );
1851                                 } else {
1852                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
1853                                 }
1854                         } else {
1855                                 $result .= substr( $invalue, $i, 1 );
1856                         }
1857                 }
1858                 // reverse the transform that we made for reversability reasons.
1859                 return strtr( $result, array( "&#x0" => "&#x" ) );
1860         }
1861
1862         function noCreatePermission() {
1863                 global $wgOut;
1864                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
1865                 $wgOut->addWikiText( wfMsg( 'nocreatetext' ) );
1866         }
1867
1868 }
1869
1870 ?>