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         var $mPreviewTemplates;
  36
  37         # Form values
  38         var $save = false, $preview = false, $diff = false;
  39         var $minoredit = false, $watchthis = false, $recreate = false;
  40         var $textbox1 = '', $textbox2 = '', $summary = '';
  41         var $edittime = '', $section = '', $starttime = '';
  42         var $oldid = 0, $editintro = '', $scrolltop = null;
  43
  44         # Placeholders for text injection by hooks (must be HTML)
  45         # extensions should take care to _append_ to the present value
  46         var $editFormTextTop;
  47         var $editFormTextAfterWarn;
  48         var $editFormTextAfterTools;
  49         var $editFormTextBottom;
  50
  51         /**
  52          * @todo document
  53          * @param $article
  54          */
  55         function EditPage( $article ) {
  56                 $this->mArticle =& $article;
  57                 global $wgTitle;
  58                 $this->mTitle =& $wgTitle;
  59
  60                 # Placeholders for text injection by hooks (empty per default)
  61                 $this->editFormTextTop = "";
  62                 $this->editFormTextAfterWarn = "";
  63                 $this->editFormTextAfterTools = "";
  64                 $this->editFormTextBottom = "";
  65         }
  66
  67         /**
  68          * Fetch initial editing page content.
  69          */
  70         private function getContent() {
  71                 global $wgRequest, $wgParser;
  72
  73                 # Get variables from query string :P
  74                 $section = $wgRequest->getVal( 'section' );
  75                 $preload = $wgRequest->getVal( 'preload' );
  76
  77                 wfProfileIn( __METHOD__ );
  78
  79                 $text = '';
  80                 if( !$this->mTitle->exists() ) {
  81
  82                         # If requested, preload some text.
  83                         $text = $this->getPreloadedText( $preload );
  84
  85                         # We used to put MediaWiki:Newarticletext here if
  86                         # $text was empty at this point.
  87                         # This is now shown above the edit box instead.
  88                 } else {
  89                         // FIXME: may be better to use Revision class directly
  90                         // But don't mess with it just yet. Article knows how to
  91                         // fetch the page record from the high-priority server,
  92                         // which is needed to guarantee we don't pick up lagged
  93                         // information.
  94
  95                         $text = $this->mArticle->getContent();
  96
  97                         if( $section != '' ) {
  98                                 if( $section == 'new' ) {
  99                                         $text = $this->getPreloadedText( $preload );
 100                                 } else {
 101                                         $text = $wgParser->getSection( $text, $section );
 102                                 }
 103                         }
 104                 }
 105
 106                 wfProfileOut( __METHOD__ );
 107                 return $text;
 108         }
 109
 110         /**
 111          * Get the contents of a page from its title and remove includeonly tags
 112          *
 113          * @param $preload String: the title of the page.
 114          * @return string The contents of the page.
 115          */
 116         private function getPreloadedText($preload) {
 117                 if ( $preload === '' )
 118                         return '';
 119                 else {
 120                         $preloadTitle = Title::newFromText( $preload );
 121                         if ( isset( $preloadTitle ) && $preloadTitle->userCanRead() ) {
 122                                 $rev=Revision::newFromTitle($preloadTitle);
 123                                 if ( is_object( $rev ) ) {
 124                                         $text = $rev->getText();
 125                                         // TODO FIXME: AAAAAAAAAAA, this shouldn't be implementing
 126                                         // its own mini-parser! -ævar
 127                                         $text = preg_replace( '~</?includeonly>~', '', $text );
 128                                         return $text;
 129                                 } else
 130                                         return '';
 131                         }
 132                 }
 133         }
 134
 135         /**
 136          * This is the function that extracts metadata from the article body on the first view.
 137          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
 138          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
 139          */
 140         function extractMetaDataFromArticle () {
 141                 global $wgUseMetadataEdit , $wgMetadataWhitelist , $wgLang ;
 142                 $this->mMetaData = '' ;
 143                 if ( !$wgUseMetadataEdit ) return ;
 144                 if ( $wgMetadataWhitelist == '' ) return ;
 145                 $s = '' ;
 146                 $t = $this->getContent();
 147
 148                 # MISSING : <nowiki> filtering
 149
 150                 # Categories and language links
 151                 $t = explode ( "\n" , $t ) ;
 152                 $catlow = strtolower ( $wgLang->getNsText ( NS_CATEGORY ) ) ;
 153                 $cat = $ll = array() ;
 154                 foreach ( $t AS $key => $x )
 155                 {
 156                         $y = trim ( strtolower ( $x ) ) ;
 157                         while ( substr ( $y , 0 , 2 ) == '[[' )
 158                         {
 159                                 $y = explode ( ']]' , trim ( $x ) ) ;
 160                                 $first = array_shift ( $y ) ;
 161                                 $first = explode ( ':' , $first ) ;
 162                                 $ns = array_shift ( $first ) ;
 163                                 $ns = trim ( str_replace ( '[' , '' , $ns ) ) ;
 164                                 if ( strlen ( $ns ) == 2 OR strtolower ( $ns ) == $catlow )
 165                                 {
 166                                         $add = '[[' . $ns . ':' . implode ( ':' , $first ) . ']]' ;
 167                                         if ( strtolower ( $ns ) == $catlow ) $cat[] = $add ;
 168                                         else $ll[] = $add ;
 169                                         $x = implode ( ']]' , $y ) ;
 170                                         $t[$key] = $x ;
 171                                         $y = trim ( strtolower ( $x ) ) ;
 172                                 }
 173                         }
 174                 }
 175                 if ( count ( $cat ) ) $s .= implode ( ' ' , $cat ) . "\n" ;
 176                 if ( count ( $ll ) ) $s .= implode ( ' ' , $ll ) . "\n" ;
 177                 $t = implode ( "\n" , $t ) ;
 178
 179                 # Load whitelist
 180                 $sat = array () ; # stand-alone-templates; must be lowercase
 181                 $wl_title = Title::newFromText ( $wgMetadataWhitelist ) ;
 182                 $wl_article = new Article ( $wl_title ) ;
 183                 $wl = explode ( "\n" , $wl_article->getContent() ) ;
 184                 foreach ( $wl AS $x )
 185                 {
 186                         $isentry = false ;
 187                         $x = trim ( $x ) ;
 188                         while ( substr ( $x , 0 , 1 ) == '*' )
 189                         {
 190                                 $isentry = true ;
 191                                 $x = trim ( substr ( $x , 1 ) ) ;
 192                         }
 193                         if ( $isentry )
 194                         {
 195                                 $sat[] = strtolower ( $x ) ;
 196                         }
 197
 198                 }
 199
 200                 # Templates, but only some
 201                 $t = explode ( '{{' , $t ) ;
 202                 $tl = array () ;
 203                 foreach ( $t AS $key => $x )
 204                 {
 205                         $y = explode ( '}}' , $x , 2 ) ;
 206                         if ( count ( $y ) == 2 )
 207                         {
 208                                 $z = $y[0] ;
 209                                 $z = explode ( '|' , $z ) ;
 210                                 $tn = array_shift ( $z ) ;
 211                                 if ( in_array ( strtolower ( $tn ) , $sat ) )
 212                                 {
 213                                         $tl[] = '{{' . $y[0] . '}}' ;
 214                                         $t[$key] = $y[1] ;
 215                                         $y = explode ( '}}' , $y[1] , 2 ) ;
 216                                 }
 217                                 else $t[$key] = '{{' . $x ;
 218                         }
 219                         else if ( $key != 0 ) $t[$key] = '{{' . $x ;
 220                         else $t[$key] = $x ;
 221                 }
 222                 if ( count ( $tl ) ) $s .= implode ( ' ' , $tl ) ;
 223                 $t = implode ( '' , $t ) ;
 224
 225                 $t = str_replace ( "\n\n\n" , "\n" , $t ) ;
 226                 $this->mArticle->mContent = $t ;
 227                 $this->mMetaData = $s ;
 228         }
 229
 230         function submit() {
 231                 $this->edit();
 232         }
 233
 234         /**
 235          * This is the function that gets called for "action=edit". It
 236          * sets up various member variables, then passes execution to
 237          * another function, usually showEditForm()
 238          *
 239          * The edit form is self-submitting, so that when things like
 240          * preview and edit conflicts occur, we get the same form back
 241          * with the extra stuff added.  Only when the final submission
 242          * is made and all is well do we actually save and redirect to
 243          * the newly-edited page.
 244          */
 245         function edit() {
 246                 global $wgOut, $wgUser, $wgRequest, $wgTitle;
 247                 global $wgEmailConfirmToEdit;
 248
 249                 if ( ! wfRunHooks( 'AlternateEdit', array( &$this  ) ) )
 250                         return;
 251
 252                 $fname = 'EditPage::edit';
 253                 wfProfileIn( $fname );
 254                 wfDebug( "$fname: enter\n" );
 255
 256                 // this is not an article
 257                 $wgOut->setArticleFlag(false);
 258
 259                 $this->importFormData( $wgRequest );
 260                 $this->firsttime = false;
 261
 262                 if( $this->live ) {
 263                         $this->livePreview();
 264                         wfProfileOut( $fname );
 265                         return;
 266                 }
 267
 268                 if ( ! $this->mTitle->userCanEdit() ) {
 269                         wfDebug( "$fname: user can't edit\n" );
 270                         $wgOut->readOnlyPage( $this->getContent(), true );
 271                         wfProfileOut( $fname );
 272                         return;
 273                 }
 274                 wfDebug( "$fname: Checking blocks\n" );
 275                 if ( !$this->preview && !$this->diff && $wgUser->isBlockedFrom( $this->mTitle, !$this->save ) ) {
 276                         # When previewing, don't check blocked state - will get caught at save time.
 277                         # Also, check when starting edition is done against slave to improve performance.
 278                         wfDebug( "$fname: user is blocked\n" );
 279                         $this->blockedPage();
 280                         wfProfileOut( $fname );
 281                         return;
 282                 }
 283                 if ( !$wgUser->isAllowed('edit') ) {
 284                         if ( $wgUser->isAnon() ) {
 285                                 wfDebug( "$fname: user must log in\n" );
 286                                 $this->userNotLoggedInPage();
 287                                 wfProfileOut( $fname );
 288                                 return;
 289                         } else {
 290                                 wfDebug( "$fname: read-only page\n" );
 291                                 $wgOut->readOnlyPage( $this->getContent(), true );
 292                                 wfProfileOut( $fname );
 293                                 return;
 294                         }
 295                 }
 296                 if ($wgEmailConfirmToEdit && !$wgUser->isEmailConfirmed()) {
 297                         wfDebug("$fname: user must confirm e-mail address\n");
 298                         $this->userNotConfirmedPage();
 299                         wfProfileOut($fname);
 300                         return;
 301                 }
 302                 if ( !$this->mTitle->userCanCreate() && !$this->mTitle->exists() ) {
 303                         wfDebug( "$fname: no create permission\n" );
 304                         $this->noCreatePermission();
 305                         wfProfileOut( $fname );
 306                         return;
 307                 }
 308                 if ( wfReadOnly() ) {
 309                         wfDebug( "$fname: read-only mode is engaged\n" );
 310                         if( $this->save || $this->preview ) {
 311                                 $this->formtype = 'preview';
 312                         } else if ( $this->diff ) {
 313                                 $this->formtype = 'diff';
 314                         } else {
 315                                 $wgOut->readOnlyPage( $this->getContent() );
 316                                 wfProfileOut( $fname );
 317                                 return;
 318                         }
 319                 } else {
 320                         if ( $this->save ) {
 321                                 $this->formtype = 'save';
 322                         } else if ( $this->preview ) {
 323                                 $this->formtype = 'preview';
 324                         } else if ( $this->diff ) {
 325                                 $this->formtype = 'diff';
 326                         } else { # First time through
 327                                 $this->firsttime = true;
 328                                 if( $this->previewOnOpen() ) {
 329                                         $this->formtype = 'preview';
 330                                 } else {
 331                                         $this->extractMetaDataFromArticle () ;
 332                                         $this->formtype = 'initial';
 333                                 }
 334                         }
 335                 }
 336
 337                 wfProfileIn( "$fname-business-end" );
 338
 339                 $this->isConflict = false;
 340                 // css / js subpages of user pages get a special treatment
 341                 $this->isCssJsSubpage      = $wgTitle->isCssJsSubpage();
 342                 $this->isValidCssJsSubpage = $wgTitle->isValidCssJsSubpage();
 343
 344                 /* Notice that we can't use isDeleted, because it returns true if article is ever deleted
 345                  * no matter it's current state
 346                  */
 347                 $this->deletedSinceEdit = false;
 348                 if ( $this->edittime != '' ) {
 349                         /* Note that we rely on logging table, which hasn't been always there,
 350                          * but that doesn't matter, because this only applies to brand new
 351                          * deletes. This is done on every preview and save request. Move it further down
 352                          * to only perform it on saves
 353                          */
 354                         if ( $this->mTitle->isDeleted() ) {
 355                                 $this->lastDelete = $this->getLastDelete();
 356                                 if ( !is_null($this->lastDelete) ) {
 357                                         $deletetime = $this->lastDelete->log_timestamp;
 358                                         if ( ($deletetime - $this->starttime) > 0 ) {
 359                                                 $this->deletedSinceEdit = true;
 360                                         }
 361                                 }
 362                         }
 363                 }
 364
 365                 if(!$this->mTitle->getArticleID() && ('initial' == $this->formtype || $this->firsttime )) { # new article
 366                         $this->showIntro();
 367                 }
 368                 if( $this->mTitle->isTalkPage() ) {
 369                         $wgOut->addWikiText( wfMsg( 'talkpagetext' ) );
 370                 }
 371
 372                 # Attempt submission here.  This will check for edit conflicts,
 373                 # and redundantly check for locked database, blocked IPs, etc.
 374                 # that edit() already checked just in case someone tries to sneak
 375                 # in the back door with a hand-edited submission URL.
 376
 377                 if ( 'save' == $this->formtype ) {
 378                         if ( !$this->attemptSave() ) {
 379                                 wfProfileOut( "$fname-business-end" );
 380                                 wfProfileOut( $fname );
 381                                 return;
 382                         }
 383                 }
 384
 385                 # First time through: get contents, set time for conflict
 386                 # checking, etc.
 387                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 388                         $this->initialiseForm();
 389                         if( !$this->mTitle->getArticleId() )
 390                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 391                 }
 392
 393                 $this->showEditForm();
 394                 wfProfileOut( "$fname-business-end" );
 395                 wfProfileOut( $fname );
 396         }
 397
 398         /**
 399          * Return true if this page should be previewed when the edit form
 400          * is initially opened.
 401          * @return bool
 402          * @private
 403          */
 404         function previewOnOpen() {
 405                 global $wgUser;
 406                 return $this->section != 'new' &&
 407                         ( ( $wgUser->getOption( 'previewonfirst' ) && $this->mTitle->exists() ) ||
 408                                 ( $this->mTitle->getNamespace() == NS_CATEGORY &&
 409                                         !$this->mTitle->exists() ) );
 410         }
 411
 412         /**
 413          * @todo document
 414          * @param $request
 415          */
 416         function importFormData( &$request ) {
 417                 global $wgLang, $wgUser;
 418                 $fname = 'EditPage::importFormData';
 419                 wfProfileIn( $fname );
 420
 421                 if( $request->wasPosted() ) {
 422                         # These fields need to be checked for encoding.
 423                         # Also remove trailing whitespace, but don't remove _initial_
 424                         # whitespace from the text boxes. This may be significant formatting.
 425                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 426                         $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
 427                         $this->mMetaData = rtrim( $request->getText( 'metadata'   ) );
 428                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 429                         $this->summary   = $wgLang->truncate( $request->getText( 'wpSummary'  ), 250 );
 430
 431                         $this->edittime = $request->getVal( 'wpEdittime' );
 432                         $this->starttime = $request->getVal( 'wpStarttime' );
 433
 434                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 435
 436                         if( is_null( $this->edittime ) ) {
 437                                 # If the form is incomplete, force to preview.
 438                                 wfDebug( "$fname: Form data appears to be incomplete\n" );
 439                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 440                                 $this->preview  = true;
 441                         } else {
 442                                 /* Fallback for live preview */
 443                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 444                                 $this->diff = $request->getCheck( 'wpDiff' );
 445
 446                                 // Remember whether a save was requested, so we can indicate
 447                                 // if we forced preview due to session failure.
 448                                 $this->mTriedSave = !$this->preview;
 449
 450                                 if ( $this->tokenOk( $request ) ) {
 451                                         # Some browsers will not report any submit button
 452                                         # if the user hits enter in the comment box.
 453                                         # The unmarked state will be assumed to be a save,
 454                                         # if the form seems otherwise complete.
 455                                         wfDebug( "$fname: Passed token check.\n" );
 456                                 } else if ( $this->diff ) {
 457                                         # Failed token check, but only requested "Show Changes".
 458                                         wfDebug( "$fname: Failed token check; Show Changes requested.\n" );
 459                                 } else {
 460                                         # Page might be a hack attempt posted from
 461                                         # an external site. Preview instead of saving.
 462                                         wfDebug( "$fname: Failed token check; forcing preview\n" );
 463                                         $this->preview = true;
 464                                 }
 465                         }
 466                         $this->save    = ! ( $this->preview OR $this->diff );
 467                         if( !preg_match( '/^\d{14}$/', $this->edittime )) {
 468                                 $this->edittime = null;
 469                         }
 470
 471                         if( !preg_match( '/^\d{14}$/', $this->starttime )) {
 472                                 $this->starttime = null;
 473                         }
 474
 475                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 476
 477                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 478                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 479
 480                         # Don't force edit summaries when a user is editing their own user or talk page
 481                         if( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) && $this->mTitle->getText() == $wgUser->getName() ) {
 482                                 $this->allowBlankSummary = true;
 483                         } else {
 484                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' );
 485                         }
 486
 487                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 488                 } else {
 489                         # Not a posted form? Start with nothing.
 490                         wfDebug( "$fname: Not a posted form.\n" );
 491                         $this->textbox1  = '';
 492                         $this->textbox2  = '';
 493                         $this->mMetaData = '';
 494                         $this->summary   = '';
 495                         $this->edittime  = '';
 496                         $this->starttime = wfTimestampNow();
 497                         $this->preview   = false;
 498                         $this->save      = false;
 499                         $this->diff      = false;
 500                         $this->minoredit = false;
 501                         $this->watchthis = false;
 502                         $this->recreate  = false;
 503                 }
 504
 505                 $this->oldid = $request->getInt( 'oldid' );
 506
 507                 # Section edit can come from either the form or a link
 508                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 509
 510                 $this->live = $request->getCheck( 'live' );
 511                 $this->editintro = $request->getText( 'editintro' );
 512
 513                 wfProfileOut( $fname );
 514         }
 515
 516         /**
 517          * Make sure the form isn't faking a user's credentials.
 518          *
 519          * @param $request WebRequest
 520          * @return bool
 521          * @private
 522          */
 523         function tokenOk( &$request ) {
 524                 global $wgUser;
 525                 if( $wgUser->isAnon() ) {
 526                         # Anonymous users may not have a session
 527                         # open. Don't tokenize.
 528                         $this->mTokenOk = true;
 529                 } else {
 530                         $this->mTokenOk = $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
 531                 }
 532                 return $this->mTokenOk;
 533         }
 534
 535         /** */
 536         function showIntro() {
 537                 global $wgOut, $wgUser;
 538                 $addstandardintro=true;
 539                 if($this->editintro) {
 540                         $introtitle=Title::newFromText($this->editintro);
 541                         if(isset($introtitle) && $introtitle->userCanRead()) {
 542                                 $rev=Revision::newFromTitle($introtitle);
 543                                 if($rev) {
 544                                         $wgOut->addSecondaryWikiText($rev->getText());
 545                                         $addstandardintro=false;
 546                                 }
 547                         }
 548                 }
 549                 if($addstandardintro) {
 550                         if ( $wgUser->isLoggedIn() )
 551                                 $wgOut->addWikiText( wfMsg( 'newarticletext' ) );
 552                         else
 553                                 $wgOut->addWikiText( wfMsg( 'newarticletextanon' ) );
 554                 }
 555         }
 556
 557         /**
 558          * Attempt submission
 559          * @return bool false if output is done, true if the rest of the form should be displayed
 560          */
 561         function attemptSave() {
 562                 global $wgSpamRegex, $wgFilterCallback, $wgUser, $wgOut;
 563                 global $wgMaxArticleSize;
 564
 565                 $fname = 'EditPage::attemptSave';
 566                 wfProfileIn( $fname );
 567                 wfProfileIn( "$fname-checks" );
 568
 569                 # Reintegrate metadata
 570                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 571                 $this->mMetaData = '' ;
 572
 573                 # Check for spam
 574                 $matches = array();
 575                 if ( $wgSpamRegex && preg_match( $wgSpamRegex, $this->textbox1, $matches ) ) {
 576                         $this->spamPage ( $matches[0] );
 577                         wfProfileOut( "$fname-checks" );
 578                         wfProfileOut( $fname );
 579                         return false;
 580                 }
 581                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section ) ) {
 582                         # Error messages or other handling should be performed by the filter function
 583                         wfProfileOut( $fname );
 584                         wfProfileOut( "$fname-checks" );
 585                         return false;
 586                 }
 587                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError ) ) ) {
 588                         # Error messages etc. could be handled within the hook...
 589                         wfProfileOut( $fname );
 590                         wfProfileOut( "$fname-checks" );
 591                         return false;
 592                 } elseif( $this->hookError != '' ) {
 593                         # ...or the hook could be expecting us to produce an error
 594                         wfProfileOut( "$fname-checks " );
 595                         wfProfileOut( $fname );
 596                         return true;
 597                 }
 598                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 599                         # Check block state against master, thus 'false'.
 600                         $this->blockedPage();
 601                         wfProfileOut( "$fname-checks" );
 602                         wfProfileOut( $fname );
 603                         return false;
 604                 }
 605                 $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 606                 if ( $this->kblength > $wgMaxArticleSize ) {
 607                         // Error will be displayed by showEditForm()
 608                         $this->tooBig = true;
 609                         wfProfileOut( "$fname-checks" );
 610                         wfProfileOut( $fname );
 611                         return true;
 612                 }
 613
 614                 if ( !$wgUser->isAllowed('edit') ) {
 615                         if ( $wgUser->isAnon() ) {
 616                                 $this->userNotLoggedInPage();
 617                                 wfProfileOut( "$fname-checks" );
 618                                 wfProfileOut( $fname );
 619                                 return false;
 620                         }
 621                         else {
 622                                 $wgOut->readOnlyPage();
 623                                 wfProfileOut( "$fname-checks" );
 624                                 wfProfileOut( $fname );
 625                                 return false;
 626                         }
 627                 }
 628
 629                 if ( wfReadOnly() ) {
 630                         $wgOut->readOnlyPage();
 631                         wfProfileOut( "$fname-checks" );
 632                         wfProfileOut( $fname );
 633                         return false;
 634                 }
 635                 if ( $wgUser->pingLimiter() ) {
 636                         $wgOut->rateLimited();
 637                         wfProfileOut( "$fname-checks" );
 638                         wfProfileOut( $fname );
 639                         return false;
 640                 }
 641
 642                 # If the article has been deleted while editing, don't save it without
 643                 # confirmation
 644                 if ( $this->deletedSinceEdit && !$this->recreate ) {
 645                         wfProfileOut( "$fname-checks" );
 646                         wfProfileOut( $fname );
 647                         return true;
 648                 }
 649
 650                 wfProfileOut( "$fname-checks" );
 651
 652                 # If article is new, insert it.
 653                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 654                 if ( 0 == $aid ) {
 655                         // Late check for create permission, just in case *PARANOIA*
 656                         if ( !$this->mTitle->userCanCreate() ) {
 657                                 wfDebug( "$fname: no create permission\n" );
 658                                 $this->noCreatePermission();
 659                                 wfProfileOut( $fname );
 660                                 return;
 661                         }
 662
 663                         # Don't save a new article if it's blank.
 664                         if ( ( '' == $this->textbox1 ) ) {
 665                                         $wgOut->redirect( $this->mTitle->getFullURL() );
 666                                         wfProfileOut( $fname );
 667                                         return false;
 668                         }
 669
 670                         $isComment=($this->section=='new');
 671                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 672                                 $this->minoredit, $this->watchthis, false, $isComment);
 673
 674                         wfProfileOut( $fname );
 675                         return false;
 676                 }
 677
 678                 # Article exists. Check for edit conflict.
 679
 680                 $this->mArticle->clear(); # Force reload of dates, etc.
 681                 $this->mArticle->forUpdate( true ); # Lock the article
 682
 683                 if( $this->mArticle->getTimestamp() != $this->edittime ) {
 684                         $this->isConflict = true;
 685                         if( $this->section == 'new' ) {
 686                                 if( $this->mArticle->getUserText() == $wgUser->getName() &&
 687                                         $this->mArticle->getComment() == $this->summary ) {
 688                                         // Probably a duplicate submission of a new comment.
 689                                         // This can happen when squid resends a request after
 690                                         // a timeout but the first one actually went through.
 691                                         wfDebug( "EditPage::editForm duplicate new section submission; trigger edit conflict!\n" );
 692                                 } else {
 693                                         // New comment; suppress conflict.
 694                                         $this->isConflict = false;
 695                                         wfDebug( "EditPage::editForm conflict suppressed; new section\n" );
 696                                 }
 697                         }
 698                 }
 699                 $userid = $wgUser->getID();
 700
 701                 if ( $this->isConflict) {
 702                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 703                                 $this->mArticle->getTimestamp() . "'\n" );
 704                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime);
 705                 }
 706                 else {
 707                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 708                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary);
 709                 }
 710                 if( is_null( $text ) ) {
 711                         wfDebug( "EditPage::editForm activating conflict; section replace failed.\n" );
 712                         $this->isConflict = true;
 713                         $text = $this->textbox1;
 714                 }
 715
 716                 # Suppress edit conflict with self, except for section edits where merging is required.
 717                 if ( ( $this->section == '' ) && ( 0 != $userid ) && ( $this->mArticle->getUser() == $userid ) ) {
 718                         wfDebug( "Suppressing edit conflict, same user.\n" );
 719                         $this->isConflict = false;
 720                 } else {
 721                         # switch from section editing to normal editing in edit conflict
 722                         if($this->isConflict) {
 723                                 # Attempt merge
 724                                 if( $this->mergeChangesInto( $text ) ){
 725                                         // Successful merge! Maybe we should tell the user the good news?
 726                                         $this->isConflict = false;
 727                                         wfDebug( "Suppressing edit conflict, successful merge.\n" );
 728                                 } else {
 729                                         $this->section = '';
 730                                         $this->textbox1 = $text;
 731                                         wfDebug( "Keeping edit conflict, failed merge.\n" );
 732                                 }
 733                         }
 734                 }
 735
 736                 if ( $this->isConflict ) {
 737                         wfProfileOut( $fname );
 738                         return true;
 739                 }
 740
 741                 $oldtext = $this->mArticle->getContent();
 742
 743                 # Handle the user preference to force summaries here, but not for null edits
 744                 if( $this->section != 'new' && !$this->allowBlankSummary && $wgUser->getOption( 'forceeditsummary')
 745                         &&  0 != strcmp($oldtext, $text) && !Article::getRedirectAutosummary( $text )) {
 746                         if( md5( $this->summary ) == $this->autoSumm ) {
 747                                 $this->missingSummary = true;
 748                                 wfProfileOut( $fname );
 749                                 return( true );
 750                         }
 751                 }
 752
 753                 #And a similar thing for new sections
 754                 if( $this->section == 'new' && !$this->allowBlankSummary && $wgUser->getOption( 'forceeditsummary' ) ) {
 755                         if (trim($this->summary) == '') {
 756                                 $this->missingSummary = true;
 757                                 wfProfileOut( $fname );
 758                                 return( true );
 759                         }
 760                 }
 761
 762                 # All's well
 763                 wfProfileIn( "$fname-sectionanchor" );
 764                 $sectionanchor = '';
 765                 if( $this->section == 'new' ) {
 766                         if ( $this->textbox1 == '' ) {
 767                                 $this->missingComment = true;
 768                                 return true;
 769                         }
 770                         if( $this->summary != '' ) {
 771                                 $sectionanchor = $this->sectionAnchor( $this->summary );
 772                         }
 773                 } elseif( $this->section != '' ) {
 774                         # Try to get a section anchor from the section source, redirect to edited section if header found
 775                         # XXX: might be better to integrate this into Article::replaceSection
 776                         # for duplicate heading checking and maybe parsing
 777                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 778                         # we can't deal with anchors, includes, html etc in the header for now,
 779                         # headline would need to be parsed to improve this
 780                         if($hasmatch and strlen($matches[2]) > 0) {
 781                                 $sectionanchor = $this->sectionAnchor( $matches[2] );
 782                         }
 783                 }
 784                 wfProfileOut( "$fname-sectionanchor" );
 785
 786                 // Save errors may fall down to the edit form, but we've now
 787                 // merged the section into full text. Clear the section field
 788                 // so that later submission of conflict forms won't try to
 789                 // replace that into a duplicated mess.
 790                 $this->textbox1 = $text;
 791                 $this->section = '';
 792
 793                 // Check for length errors again now that the section is merged in
 794                 $this->kblength = (int)(strlen( $text ) / 1024);
 795                 if ( $this->kblength > $wgMaxArticleSize ) {
 796                         $this->tooBig = true;
 797                         wfProfileOut( $fname );
 798                         return true;
 799                 }
 800
 801                 # update the article here
 802                 if( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
 803                         $this->watchthis, '', $sectionanchor ) ) {
 804                         wfProfileOut( $fname );
 805                         return false;
 806                 } else {
 807                         $this->isConflict = true;
 808                 }
 809                 wfProfileOut( $fname );
 810                 return true;
 811         }
 812
 813         /**
 814          * Initialise form fields in the object
 815          * Called on the first invocation, e.g. when a user clicks an edit link
 816          */
 817         function initialiseForm() {
 818                 $this->edittime = $this->mArticle->getTimestamp();
 819                 $this->textbox1 = $this->getContent();
 820                 $this->summary = '';
 821                 if ( !$this->mArticle->exists() && $this->mArticle->mTitle->getNamespace() == NS_MEDIAWIKI )
 822                         $this->textbox1 = wfMsgWeirdKey( $this->mArticle->mTitle->getText() ) ;
 823                 wfProxyCheck();
 824         }
 825
 826         /**
 827          * Send the edit form and related headers to $wgOut
 828          * @param $formCallback Optional callable that takes an OutputPage
 829          *                      parameter; will be called during form output
 830          *                      near the top, for captchas and the like.
 831          */
 832         function showEditForm( $formCallback=null ) {
 833                 global $wgOut, $wgUser, $wgLang, $wgContLang, $wgMaxArticleSize;
 834
 835                 $fname = 'EditPage::showEditForm';
 836                 wfProfileIn( $fname );
 837
 838                 $sk =& $wgUser->getSkin();
 839
 840                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) ) ;
 841
 842                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 843
 844                 # Enabled article-related sidebar, toplinks, etc.
 845                 $wgOut->setArticleRelated( true );
 846
 847                 if ( $this->isConflict ) {
 848                         $s = wfMsg( 'editconflict', $this->mTitle->getPrefixedText() );
 849                         $wgOut->setPageTitle( $s );
 850                         $wgOut->addWikiText( wfMsg( 'explainconflict' ) );
 851
 852                         $this->textbox2 = $this->textbox1;
 853                         $this->textbox1 = $this->getContent();
 854                         $this->edittime = $this->mArticle->getTimestamp();
 855                 } else {
 856
 857                         if( $this->section != '' ) {
 858                                 if( $this->section == 'new' ) {
 859                                         $s = wfMsg('editingcomment', $this->mTitle->getPrefixedText() );
 860                                 } else {
 861                                         $s = wfMsg('editingsection', $this->mTitle->getPrefixedText() );
 862                                         $matches = array();
 863                                         if( !$this->summary && !$this->preview && !$this->diff ) {
 864                                                 preg_match( "/^(=+)(.+)\\1/mi",
 865                                                         $this->textbox1,
 866                                                         $matches );
 867                                                 if( !empty( $matches[2] ) ) {
 868                                                         $this->summary = "/* ". trim($matches[2])." */ ";
 869                                                 }
 870                                         }
 871                                 }
 872                         } else {
 873                                 $s = wfMsg( 'editing', $this->mTitle->getPrefixedText() );
 874                         }
 875                         $wgOut->setPageTitle( $s );
 876
 877                         if ( $this->missingComment ) {
 878                                 $wgOut->addWikiText( wfMsg( 'missingcommenttext' ) );
 879                         }
 880
 881                         if( $this->missingSummary && $this->section != 'new' ) {
 882                                 $wgOut->addWikiText( wfMsg( 'missingsummary' ) );
 883                         }
 884
 885                         if( $this->missingSummary && $this->section == 'new' ) {
 886                                 $wgOut->addWikiText( wfMsg( 'missingcommentheader' ) );
 887                         }
 888
 889                         if( !$this->hookError == '' ) {
 890                                 $wgOut->addWikiText( $this->hookError );
 891                         }
 892
 893                         if ( !$this->checkUnicodeCompliantBrowser() ) {
 894                                 $wgOut->addWikiText( wfMsg( 'nonunicodebrowser') );
 895                         }
 896                         if ( isset( $this->mArticle )
 897                              && isset( $this->mArticle->mRevision )
 898                              && !$this->mArticle->mRevision->isCurrent() ) {
 899                                 $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
 900                                 $wgOut->addWikiText( wfMsg( 'editingold' ) );
 901                         }
 902                 }
 903
 904                 if( wfReadOnly() ) {
 905                         $wgOut->addWikiText( wfMsg( 'readonlywarning' ) );
 906                 } elseif( $wgUser->isAnon() && $this->formtype != 'preview' ) {
 907                         $wgOut->addWikiText( wfMsg( 'anoneditwarning' ) );
 908                 } else {
 909                         if( $this->isCssJsSubpage && $this->formtype != 'preview' ) {
 910                                 # Check the skin exists
 911                                 if( $this->isValidCssJsSubpage ) {
 912                                         $wgOut->addWikiText( wfMsg( 'usercssjsyoucanpreview' ) );
 913                                 } else {
 914                                         $wgOut->addWikiText( wfMsg( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
 915                                 }
 916                         }
 917                 }
 918
 919                 if( $this->mTitle->isProtected( 'edit' ) ) {
 920                         # Is the protection due to the namespace, e.g. interface text?
 921                         if( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 922                                 # Yes; remind the user
 923                                 $notice = wfMsg( 'editinginterface' );
 924                         } elseif( $this->mTitle->isSemiProtected() ) {
 925                                 # No; semi protected
 926                                 $notice = wfMsg( 'semiprotectedpagewarning' );
 927                                 if( wfEmptyMsg( 'semiprotectedpagewarning', $notice ) || $notice == '-' ) {
 928                                         $notice = '';
 929                                 }
 930                         } else {
 931                                 # No; regular protection
 932                                 $notice = wfMsg( 'protectedpagewarning' );
 933                         }
 934                         $wgOut->addWikiText( $notice );
 935                 }
 936
 937                 if ( $this->kblength === false ) {
 938                         $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 939                 }
 940                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
 941                         $wgOut->addWikiText( wfMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgMaxArticleSize ) );
 942                 } elseif( $this->kblength > 29 ) {
 943                         $wgOut->addWikiText( wfMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) ) );
 944                 }
 945
 946                 #need to parse the preview early so that we know which templates are used,
 947                 #otherwise users with "show preview after edit box" will get a blank list
 948                 $previewOutput = $this->getPreviewText();
 949
 950                 $rows = $wgUser->getIntOption( 'rows' );
 951                 $cols = $wgUser->getIntOption( 'cols' );
 952
 953                 $ew = $wgUser->getOption( 'editwidth' );
 954                 if ( $ew ) $ew = " style=\"width:100%\"";
 955                 else $ew = '';
 956
 957                 $q = 'action=submit';
 958                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
 959                 $action = $this->mTitle->escapeLocalURL( $q );
 960
 961                 $summary = wfMsg('summary');
 962                 $subject = wfMsg('subject');
 963                 $minor   = wfMsgExt('minoredit', array('parseinline'));
 964                 $watchthis = wfMsgExt('watchthis', array('parseinline'));
 965
 966                 $cancel = $sk->makeKnownLink( $this->mTitle->getPrefixedText(),
 967                                 wfMsgExt('cancel', array('parseinline')) );
 968                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ));
 969                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
 970                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
 971                         htmlspecialchars( wfMsg( 'newwindow' ) );
 972
 973                 global $wgRightsText;
 974                 $copywarn = "<div id=\"editpage-copywarn\">\n" .
 975                         wfMsg( $wgRightsText ? 'copyrightwarning' : 'copyrightwarning2',
 976                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
 977                                 $wgRightsText ) . "\n</div>";
 978
 979                 if( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
 980                         # prepare toolbar for edit buttons
 981                         $toolbar = $this->getEditToolbar();
 982                 } else {
 983                         $toolbar = '';
 984                 }
 985
 986                 // activate checkboxes if user wants them to be always active
 987                 if( !$this->preview && !$this->diff ) {
 988                         # Sort out the "watch" checkbox
 989                         if( $wgUser->getOption( 'watchdefault' ) ) {
 990                                 # Watch all edits
 991                                 $this->watchthis = true;
 992                         } elseif( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 993                                 # Watch creations
 994                                 $this->watchthis = true;
 995                         } elseif( $this->mTitle->userIsWatching() ) {
 996                                 # Already watched
 997                                 $this->watchthis = true;
 998                         }
 999
1000                         if( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
1001                 }
1002
1003                 $minoredithtml = '';
1004
1005                 if ( $wgUser->isAllowed('minoredit') ) {
1006                         $minoredithtml =
1007                                 "<input tabindex='3' type='checkbox' value='1' name='wpMinoredit'".($this->minoredit?" checked='checked'":"").
1008                                 " accesskey='".wfMsg('accesskey-minoredit')."' id='wpMinoredit' />\n".
1009                                 "<label for='wpMinoredit' title='".wfMsg('tooltip-minoredit')."'>{$minor}</label>\n";
1010                 }
1011
1012                 $watchhtml = '';
1013
1014                 if ( $wgUser->isLoggedIn() ) {
1015                         $watchhtml = "<input tabindex='4' type='checkbox' name='wpWatchthis'".
1016                                 ($this->watchthis?" checked='checked'":"").
1017                                 " accesskey=\"".htmlspecialchars(wfMsg('accesskey-watch'))."\" id='wpWatchthis'  />\n".
1018                                 "<label for='wpWatchthis' title=\"" .
1019                                         htmlspecialchars(wfMsg('tooltip-watch'))."\">{$watchthis}</label>\n";
1020                 }
1021
1022                 $checkboxhtml = $minoredithtml . $watchhtml;
1023
1024                 if ( $wgUser->getOption( 'previewontop' ) ) {
1025
1026                         if ( 'preview' == $this->formtype ) {
1027                                 $this->showPreview( $previewOutput );
1028                         } else {
1029                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
1030                         }
1031
1032                         if ( 'diff' == $this->formtype ) {
1033                                 $wgOut->addHTML( $this->getDiff() );
1034                         }
1035                 }
1036
1037
1038                 $wgOut->addHTML( $this->editFormTextTop );
1039
1040                 # if this is a comment, show a subject line at the top, which is also the edit summary.
1041                 # Otherwise, show a summary field at the bottom
1042                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
1043                 if( $this->section == 'new' ) {
1044                         $commentsubject="<span id='wpSummaryLabel'><label for='wpSummary'>{$subject}:</label></span>\n<div class='editOptions'>\n<input tabindex='1' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
1045                         $editsummary = '';
1046                         $subjectpreview = $summarytext && $this->preview ? "<div class=\"mw-summary-preview\">".wfMsg('subject-preview').':'.$sk->commentBlock( $this->summary, $this->mTitle )."</div>\n" : '';
1047                         $summarypreview = '';
1048                 } else {
1049                         $commentsubject = '';
1050                         $editsummary="<span id='wpSummaryLabel'><label for='wpSummary'>{$summary}:</label></span>\n<div class='editOptions'>\n<input tabindex='2' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
1051                         $summarypreview = $summarytext && $this->preview ? "<div class=\"mw-summary-preview\">".wfMsg('summary-preview').':'.$sk->commentBlock( $this->summary, $this->mTitle )."</div>\n" : '';
1052                         $subjectpreview = '';
1053                 }
1054
1055                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
1056                 if( !$this->preview && !$this->diff ) {
1057                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
1058                 }
1059                 $templates = ($this->preview || $this->section) ? $this->mPreviewTemplates : $this->mArticle->getUsedTemplates();
1060                 $formattedtemplates = $sk->formatTemplates( $templates, $this->preview, $this->section != '');
1061
1062                 global $wgUseMetadataEdit ;
1063                 if ( $wgUseMetadataEdit ) {
1064                         $metadata = $this->mMetaData ;
1065                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
1066                         $top = wfMsgWikiHtml( 'metadata_help' );
1067                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
1068                 }
1069                 else $metadata = "" ;
1070
1071                 $hidden = '';
1072                 $recreate = '';
1073                 if ($this->deletedSinceEdit) {
1074                         if ( 'save' != $this->formtype ) {
1075                                 $wgOut->addWikiText( wfMsg('deletedwhileediting'));
1076                         } else {
1077                                 // Hide the toolbar and edit area, use can click preview to get it back
1078                                 // Add an confirmation checkbox and explanation.
1079                                 $toolbar = '';
1080                                 $hidden = 'type="hidden" style="display:none;"';
1081                                 $recreate = $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ));
1082                                 $recreate .=
1083                                         "<br /><input tabindex='1' type='checkbox' value='1' name='wpRecreate' id='wpRecreate' />".
1084                                         "<label for='wpRecreate' title='".wfMsg('tooltip-recreate')."'>". wfMsg('recreate')."</label>";
1085                         }
1086                 }
1087
1088                 $temp = array(
1089                         'id'        => 'wpSave',
1090                         'name'      => 'wpSave',
1091                         'type'      => 'submit',
1092                         'tabindex'  => '5',
1093                         'value'     => wfMsg('savearticle'),
1094                         'accesskey' => wfMsg('accesskey-save'),
1095                         'title'     => wfMsg('tooltip-save'),
1096                 );
1097                 $buttons['save'] = wfElement('input', $temp, '');
1098                 $temp = array(
1099                         'id'        => 'wpDiff',
1100                         'name'      => 'wpDiff',
1101                         'type'      => 'submit',
1102                         'tabindex'  => '7',
1103                         'value'     => wfMsg('showdiff'),
1104                         'accesskey' => wfMsg('accesskey-diff'),
1105                         'title'     => wfMsg('tooltip-diff'),
1106                 );
1107                 $buttons['diff'] = wfElement('input', $temp, '');
1108
1109                 global $wgLivePreview;
1110                 if ( $wgLivePreview && $wgUser->getOption( 'uselivepreview' ) ) {
1111                         $temp = array(
1112                                 'id'        => 'wpPreview',
1113                                 'name'      => 'wpPreview',
1114                                 'type'      => 'submit',
1115                                 'tabindex'  => '6',
1116                                 'value'     => wfMsg('showpreview'),
1117                                 'accesskey' => '',
1118                                 'title'     => wfMsg('tooltip-preview'),
1119                                 'style'     => 'display: none;',
1120                         );
1121                         $buttons['preview'] = wfElement('input', $temp, '');
1122                         $temp = array(
1123                                 'id'        => 'wpLivePreview',
1124                                 'name'      => 'wpLivePreview',
1125                                 'type'      => 'submit',
1126                                 'tabindex'  => '6',
1127                                 'value'     => wfMsg('showlivepreview'),
1128                                 'accesskey' => wfMsg('accesskey-preview'),
1129                                 'title'     => '',
1130                                 'onclick'   => $this->doLivePreviewScript(),
1131                         );
1132                         $buttons['live'] = wfElement('input', $temp, '');
1133                 } else {
1134                         $temp = array(
1135                                 'id'        => 'wpPreview',
1136                                 'name'      => 'wpPreview',
1137                                 'type'      => 'submit',
1138                                 'tabindex'  => '6',
1139                                 'value'     => wfMsg('showpreview'),
1140                                 'accesskey' => wfMsg('accesskey-preview'),
1141                                 'title'     => wfMsg('tooltip-preview'),
1142                         );
1143                         $buttons['preview'] = wfElement('input', $temp, '');
1144                         $buttons['live'] = '';
1145                 }
1146
1147                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
1148                         ? ""
1149                         : "<input type='hidden' name=\"safemode\" value='1' />\n";
1150
1151                 $wgOut->addHTML( <<<END
1152 {$toolbar}
1153 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1154 END
1155 );
1156
1157                 if( is_callable( $formCallback ) ) {
1158                         call_user_func_array( $formCallback, array( &$wgOut ) );
1159                 }
1160
1161                 // Put these up at the top to ensure they aren't lost on early form submission
1162                 $wgOut->addHTML( "
1163 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
1164 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
1165 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
1166 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
1167
1168                 $wgOut->addHTML( <<<END
1169 $recreate
1170 {$commentsubject}
1171 {$subjectpreview}
1172 <textarea tabindex='1' accesskey="," name="wpTextbox1" id="wpTextbox1" rows='{$rows}'
1173 cols='{$cols}'{$ew} $hidden>
1174 END
1175 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox1 ) ) .
1176 "
1177 </textarea>
1178                 " );
1179
1180                 $wgOut->addWikiText( $copywarn );
1181                 $wgOut->addHTML( $this->editFormTextAfterWarn );
1182                 $wgOut->addHTML( "
1183 {$metadata}
1184 {$editsummary}
1185 {$summarypreview}
1186 {$checkboxhtml}
1187 {$safemodehtml}
1188 ");
1189
1190                 $wgOut->addHTML(
1191 "<div class='editButtons'>
1192         {$buttons['save']}
1193         {$buttons['preview']}
1194         {$buttons['live']}
1195         {$buttons['diff']}
1196         <span class='editHelp'>{$cancel} | {$edithelp}</span>
1197 </div><!-- editButtons -->
1198 </div><!-- editOptions -->");
1199
1200                 $wgOut->addWikiText( wfMsgForContent( 'edittools' ) );
1201                 $wgOut->addHTML( $this->editFormTextAfterTools );
1202
1203                 $wgOut->addHTML( "
1204 <div class='templatesUsed'>
1205 {$formattedtemplates}
1206 </div>
1207 " );
1208
1209                 if ( $wgUser->isLoggedIn() ) {
1210                         /**
1211                          * To make it harder for someone to slip a user a page
1212                          * which submits an edit form to the wiki without their
1213                          * knowledge, a random token is associated with the login
1214                          * session. If it's not passed back with the submission,
1215                          * we won't save the page, or render user JavaScript and
1216                          * CSS previews.
1217                          */
1218                         $token = htmlspecialchars( $wgUser->editToken() );
1219                         $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
1220                 }
1221
1222                 # If a blank edit summary was previously provided, and the appropriate
1223                 # user preference is active, pass a hidden tag here. This will stop the
1224                 # user being bounced back more than once in the event that a summary
1225                 # is not required.
1226                 if( $this->missingSummary ) {
1227                         $wgOut->addHTML( "<input type=\"hidden\" name=\"wpIgnoreBlankSummary\" value=\"1\" />\n" );
1228                 }
1229
1230                 # For a bit more sophisticated detection of blank summaries, hash the
1231                 # automatic one and pass that in a hidden field.
1232                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1233                 $wgOut->addHtml( wfHidden( 'wpAutoSummary', $autosumm ) );
1234
1235                 if ( $this->isConflict ) {
1236                         $wgOut->addWikiText( '==' . wfMsg( "yourdiff" ) . '==' );
1237
1238                         $de = new DifferenceEngine( $this->mTitle );
1239                         $de->setText( $this->textbox2, $this->textbox1 );
1240                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1241
1242                         $wgOut->addWikiText( '==' . wfMsg( "yourtext" ) . '==' );
1243                         $wgOut->addHTML( "<textarea tabindex=6 id='wpTextbox2' name=\"wpTextbox2\" rows='{$rows}' cols='{$cols}' wrap='virtual'>"
1244                                 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox2 ) ) . "\n</textarea>" );
1245                 }
1246                 $wgOut->addHTML( $this->editFormTextBottom );
1247                 $wgOut->addHTML( "</form>\n" );
1248                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1249
1250                         if ( $this->formtype == 'preview') {
1251                                 $this->showPreview( $previewOutput );
1252                         } else {
1253                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
1254                         }
1255
1256                         if ( $this->formtype == 'diff') {
1257                                 $wgOut->addHTML( $this->getDiff() );
1258                         }
1259
1260                 }
1261
1262                 wfProfileOut( $fname );
1263         }
1264
1265         /**
1266          * Append preview output to $wgOut.
1267          * Includes category rendering if this is a category page.
1268          *
1269          * @param string $text The HTML to be output for the preview.
1270          */
1271         private function showPreview( $text ) {
1272                 global $wgOut;
1273
1274                 $wgOut->addHTML( '<div id="wikiPreview">' );
1275                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1276                         $this->mArticle->openShowCategory();
1277                 }
1278                 $wgOut->addHTML( $text );
1279                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1280                         $this->mArticle->closeShowCategory();
1281                 }
1282                 $wgOut->addHTML( '</div>' );
1283         }
1284
1285         /**
1286          * Live Preview lets us fetch rendered preview page content and
1287          * add it to the page without refreshing the whole page.
1288          * If not supported by the browser it will fall through to the normal form
1289          * submission method.
1290          *
1291          * This function outputs a script tag to support live preview, and
1292          * returns an onclick handler which should be added to the attributes
1293          * of the preview button
1294          */
1295         function doLivePreviewScript() {
1296                 global $wgStylePath, $wgJsMimeType, $wgStyleVersion, $wgOut, $wgTitle;
1297                 $wgOut->addHTML( '<script type="'.$wgJsMimeType.'" src="' .
1298                         htmlspecialchars( "$wgStylePath/common/preview.js?$wgStyleVersion" ) .
1299                         '"></script>' . "\n" );
1300                 $liveAction = $wgTitle->getLocalUrl( 'action=submit&wpPreview=true&live=true' );
1301                 return "return !livePreview(" .
1302                         "getElementById('wikiPreview')," .
1303                         "editform.wpTextbox1.value," .
1304                         '"' . $liveAction . '"' . ")";
1305         }
1306
1307         function getLastDelete() {
1308                 $dbr =& wfGetDB( DB_SLAVE );
1309                 $fname = 'EditPage::getLastDelete';
1310                 $res = $dbr->select(
1311                         array( 'logging', 'user' ),
1312                         array( 'log_type',
1313                                'log_action',
1314                                'log_timestamp',
1315                                'log_user',
1316                                'log_namespace',
1317                                'log_title',
1318                                'log_comment',
1319                                'log_params',
1320                                'user_name', ),
1321                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1322                                'log_title' => $this->mTitle->getDBkey(),
1323                                'log_type' => 'delete',
1324                                'log_action' => 'delete',
1325                                'user_id=log_user' ),
1326                         $fname,
1327                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
1328
1329                 if($dbr->numRows($res) == 1) {
1330                         while ( $x = $dbr->fetchObject ( $res ) )
1331                                 $data = $x;
1332                         $dbr->freeResult ( $res ) ;
1333                 } else {
1334                         $data = null;
1335                 }
1336                 return $data;
1337         }
1338
1339         /**
1340          * @todo document
1341          */
1342         function getPreviewText() {
1343                 global $wgOut, $wgUser, $wgTitle, $wgParser;
1344
1345                 $fname = 'EditPage::getPreviewText';
1346                 wfProfileIn( $fname );
1347
1348                 if ( $this->mTriedSave && !$this->mTokenOk ) {
1349                         $msg = 'session_fail_preview';
1350                 } else {
1351                         $msg = 'previewnote';
1352                 }
1353                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
1354                         "<div class='previewnote'>" . $wgOut->parse( wfMsg( $msg ) ) . "</div>\n";
1355                 if ( $this->isConflict ) {
1356                         $previewhead.='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1357                 }
1358
1359                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1360                 $parserOptions->setEditSection( false );
1361
1362                 global $wgRawHtml;
1363                 if( $wgRawHtml && !$this->mTokenOk ) {
1364                         // Could be an offsite preview attempt. This is very unsafe if
1365                         // HTML is enabled, as it could be an attack.
1366                         return $wgOut->parse( "<div class='previewnote'>" .
1367                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1368                 }
1369
1370                 # don't parse user css/js, show message about preview
1371                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1372
1373                 if ( $this->isCssJsSubpage ) {
1374                         if(preg_match("/\\.css$/", $wgTitle->getText() ) ) {
1375                                 $previewtext = wfMsg('usercsspreview');
1376                         } else if(preg_match("/\\.js$/", $wgTitle->getText() ) ) {
1377                                 $previewtext = wfMsg('userjspreview');
1378                         }
1379                         $parserOptions->setTidy(true);
1380                         $parserOutput = $wgParser->parse( $previewtext , $wgTitle, $parserOptions );
1381                         $wgOut->addHTML( $parserOutput->mText );
1382                         wfProfileOut( $fname );
1383                         return $previewhead;
1384                 } else {
1385                         $toparse = $this->textbox1;
1386
1387                         # If we're adding a comment, we need to show the
1388                         # summary as the headline
1389                         if($this->section=="new" && $this->summary!="") {
1390                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1391                         }
1392
1393                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData ;
1394                         $parserOptions->setTidy(true);
1395                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ) ."\n\n",
1396                                         $wgTitle, $parserOptions );
1397
1398                         $previewHTML = $parserOutput->getText();
1399                         $wgOut->addParserOutputNoText( $parserOutput );
1400
1401                         foreach ( $parserOutput->getTemplates() as $ns => $template)
1402                                 foreach ( array_keys( $template ) as $dbk)
1403                                         $this->mPreviewTemplates[] = Title::makeTitle($ns, $dbk);
1404
1405                         wfProfileOut( $fname );
1406                         return $previewhead . $previewHTML;
1407                 }
1408         }
1409
1410         /**
1411          * Call the stock "user is blocked" page
1412          */
1413         function blockedPage() {
1414                 global $wgOut, $wgUser;
1415                 $wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
1416
1417                 # If the user made changes, preserve them when showing the markup
1418                 # (This happens when a user is blocked during edit, for instance)
1419                 $first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
1420                 if( $first ) {
1421                         $source = $this->mTitle->exists() ? $this->getContent() : false;
1422                 } else {
1423                         $source = $this->textbox1;
1424                 }
1425
1426                 # Spit out the source or the user's modified version
1427                 if( $source !== false ) {
1428                         $rows = $wgUser->getOption( 'rows' );
1429                         $cols = $wgUser->getOption( 'cols' );
1430                         $attribs = array( 'id' => 'wpTextbox1', 'name' => 'wpTextbox1', 'cols' => $cols, 'rows' => $rows, 'readonly' => 'readonly' );
1431                         $wgOut->addHtml( '<hr />' );
1432                         $wgOut->addWikiText( wfMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() ) );
1433                         $wgOut->addHtml( wfOpenElement( 'textarea', $attribs ) . htmlspecialchars( $source ) . wfCloseElement( 'textarea' ) );
1434                 }
1435         }
1436
1437         /**
1438          * Produce the stock "please login to edit pages" page
1439          */
1440         function userNotLoggedInPage() {
1441                 global $wgUser, $wgOut;
1442                 $skin = $wgUser->getSkin();
1443
1444                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1445                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $this->mTitle->getPrefixedUrl() );
1446
1447                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1448                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1449                 $wgOut->setArticleRelated( false );
1450
1451                 $wgOut->addHtml( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
1452                 $wgOut->returnToMain( false, $this->mTitle->getPrefixedUrl() );
1453         }
1454
1455         /**
1456          * Creates a basic error page which informs the user that
1457          * they have to validate their email address before being
1458          * allowed to edit.
1459          */
1460         function userNotConfirmedPage() {
1461                 global $wgOut;
1462
1463                 $wgOut->setPageTitle( wfMsg( 'confirmedittitle' ) );
1464                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1465                 $wgOut->setArticleRelated( false );
1466
1467                 $wgOut->addWikiText( wfMsg( 'confirmedittext' ) );
1468                 $wgOut->returnToMain( false );
1469         }
1470
1471         /**
1472          * Produce the stock "your edit contains spam" page
1473          *
1474          * @param $match Text which triggered one or more filters
1475          */
1476         function spamPage( $match = false ) {
1477                 global $wgOut;
1478
1479                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1480                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1481                 $wgOut->setArticleRelated( false );
1482
1483                 $wgOut->addWikiText( wfMsg( 'spamprotectiontext' ) );
1484                 if ( $match )
1485                         $wgOut->addWikiText( wfMsg( 'spamprotectionmatch', "<nowiki>{$match}</nowiki>" ) );
1486
1487                 $wgOut->returnToMain( false );
1488         }
1489
1490         /**
1491          * @private
1492          * @todo document
1493          */
1494         function mergeChangesInto( &$editText ){
1495                 $fname = 'EditPage::mergeChangesInto';
1496                 wfProfileIn( $fname );
1497
1498                 $db =& wfGetDB( DB_MASTER );
1499
1500                 // This is the revision the editor started from
1501                 $baseRevision = Revision::loadFromTimestamp(
1502                         $db, $this->mArticle->mTitle, $this->edittime );
1503                 if( is_null( $baseRevision ) ) {
1504                         wfProfileOut( $fname );
1505                         return false;
1506                 }
1507                 $baseText = $baseRevision->getText();
1508
1509                 // The current state, we want to merge updates into it
1510                 $currentRevision =  Revision::loadFromTitle(
1511                         $db, $this->mArticle->mTitle );
1512                 if( is_null( $currentRevision ) ) {
1513                         wfProfileOut( $fname );
1514                         return false;
1515                 }
1516                 $currentText = $currentRevision->getText();
1517
1518                 $result = '';
1519                 if( wfMerge( $baseText, $editText, $currentText, $result ) ){
1520                         $editText = $result;
1521                         wfProfileOut( $fname );
1522                         return true;
1523                 } else {
1524                         wfProfileOut( $fname );
1525                         return false;
1526                 }
1527         }
1528
1529         /**
1530          * Check if the browser is on a blacklist of user-agents known to
1531          * mangle UTF-8 data on form submission. Returns true if Unicode
1532          * should make it through, false if it's known to be a problem.
1533          * @return bool
1534          * @private
1535          */
1536         function checkUnicodeCompliantBrowser() {
1537                 global $wgBrowserBlackList;
1538                 if( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
1539                         // No User-Agent header sent? Trust it by default...
1540                         return true;
1541                 }
1542                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1543                 foreach ( $wgBrowserBlackList as $browser ) {
1544                         if ( preg_match($browser, $currentbrowser) ) {
1545                                 return false;
1546                         }
1547                 }
1548                 return true;
1549         }
1550
1551         /**
1552          * Format an anchor fragment as it would appear for a given section name
1553          * @param string $text
1554          * @return string
1555          * @private
1556          */
1557         function sectionAnchor( $text ) {
1558                 $headline = Sanitizer::decodeCharReferences( $text );
1559                 # strip out HTML
1560                 $headline = preg_replace( '/<.*?' . '>/', '', $headline );
1561                 $headline = trim( $headline );
1562                 $sectionanchor = '#' . urlencode( str_replace( ' ', '_', $headline ) );
1563                 $replacearray = array(
1564                         '%3A' => ':',
1565                         '%' => '.'
1566                 );
1567                 return str_replace(
1568                         array_keys( $replacearray ),
1569                         array_values( $replacearray ),
1570                         $sectionanchor );
1571         }
1572
1573         /**
1574          * Shows a bulletin board style toolbar for common editing functions.
1575          * It can be disabled in the user preferences.
1576          * The necessary JavaScript code can be found in style/wikibits.js.
1577          */
1578         function getEditToolbar() {
1579                 global $wgStylePath, $wgContLang, $wgJsMimeType;
1580
1581                 /**
1582                  * toolarray an array of arrays which each include the filename of
1583                  * the button image (without path), the opening tag, the closing tag,
1584                  * and optionally a sample text that is inserted between the two when no
1585                  * selection is highlighted.
1586                  * The tip text is shown when the user moves the mouse over the button.
1587                  *
1588                  * Already here are accesskeys (key), which are not used yet until someone
1589                  * can figure out a way to make them work in IE. However, we should make
1590                  * sure these keys are not defined on the edit page.
1591                  */
1592                 $toolarray=array(
1593                         array(  'image'=>'button_bold.png',
1594                                         'open'  =>      "\'\'\'",
1595                                         'close' =>      "\'\'\'",
1596                                         'sample'=>      wfMsg('bold_sample'),
1597                                         'tip'   =>      wfMsg('bold_tip'),
1598                                         'key'   =>      'B'
1599                                 ),
1600                         array(  'image'=>'button_italic.png',
1601                                         'open'  =>      "\'\'",
1602                                         'close' =>      "\'\'",
1603                                         'sample'=>      wfMsg('italic_sample'),
1604                                         'tip'   =>      wfMsg('italic_tip'),
1605                                         'key'   =>      'I'
1606                                 ),
1607                         array(  'image'=>'button_link.png',
1608                                         'open'  =>      '[[',
1609                                         'close' =>      ']]',
1610                                         'sample'=>      wfMsg('link_sample'),
1611                                         'tip'   =>      wfMsg('link_tip'),
1612                                         'key'   =>      'L'
1613                                 ),
1614                         array(  'image'=>'button_extlink.png',
1615                                         'open'  =>      '[',
1616                                         'close' =>      ']',
1617                                         'sample'=>      wfMsg('extlink_sample'),
1618                                         'tip'   =>      wfMsg('extlink_tip'),
1619                                         'key'   =>      'X'
1620                                 ),
1621                         array(  'image'=>'button_headline.png',
1622                                         'open'  =>      "\\n== ",
1623                                         'close' =>      " ==\\n",
1624                                         'sample'=>      wfMsg('headline_sample'),
1625                                         'tip'   =>      wfMsg('headline_tip'),
1626                                         'key'   =>      'H'
1627                                 ),
1628                         array(  'image'=>'button_image.png',
1629                                         'open'  =>      '[['.$wgContLang->getNsText(NS_IMAGE).":",
1630                                         'close' =>      ']]',
1631                                         'sample'=>      wfMsg('image_sample'),
1632                                         'tip'   =>      wfMsg('image_tip'),
1633                                         'key'   =>      'D'
1634                                 ),
1635                         array(  'image' =>'button_media.png',
1636                                         'open'  =>      '[['.$wgContLang->getNsText(NS_MEDIA).':',
1637                                         'close' =>      ']]',
1638                                         'sample'=>      wfMsg('media_sample'),
1639                                         'tip'   =>      wfMsg('media_tip'),
1640                                         'key'   =>      'M'
1641                                 ),
1642                         array(  'image' =>'button_math.png',
1643                                         'open'  =>      "<math>",
1644                                         'close' =>      "<\\/math>",
1645                                         'sample'=>      wfMsg('math_sample'),
1646                                         'tip'   =>      wfMsg('math_tip'),
1647                                         'key'   =>      'C'
1648                                 ),
1649                         array(  'image' =>'button_nowiki.png',
1650                                         'open'  =>      "<nowiki>",
1651                                         'close' =>      "<\\/nowiki>",
1652                                         'sample'=>      wfMsg('nowiki_sample'),
1653                                         'tip'   =>      wfMsg('nowiki_tip'),
1654                                         'key'   =>      'N'
1655                                 ),
1656                         array(  'image' =>'button_sig.png',
1657                                         'open'  =>      '--~~~~',
1658                                         'close' =>      '',
1659                                         'sample'=>      '',
1660                                         'tip'   =>      wfMsg('sig_tip'),
1661                                         'key'   =>      'Y'
1662                                 ),
1663                         array(  'image' =>'button_hr.png',
1664                                         'open'  =>      "\\n----\\n",
1665                                         'close' =>      '',
1666                                         'sample'=>      '',
1667                                         'tip'   =>      wfMsg('hr_tip'),
1668                                         'key'   =>      'R'
1669                                 )
1670                 );
1671                 $toolbar = "<div id='toolbar'>\n";
1672                 $toolbar.="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
1673
1674                 foreach($toolarray as $tool) {
1675
1676                         $image=$wgStylePath.'/common/images/'.$tool['image'];
1677                         $open=$tool['open'];
1678                         $close=$tool['close'];
1679                         $sample = wfEscapeJsString( $tool['sample'] );
1680
1681                         // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
1682                         // Older browsers show a "speedtip" type message only for ALT.
1683                         // Ideally these should be different, realistically they
1684                         // probably don't need to be.
1685                         $tip = wfEscapeJsString( $tool['tip'] );
1686
1687                         #$key = $tool["key"];
1688
1689                         $toolbar.="addButton('$image','$tip','$open','$close','$sample');\n";
1690                 }
1691
1692                 $toolbar.="/*]]>*/\n</script>";
1693                 $toolbar.="\n</div>";
1694                 return $toolbar;
1695         }
1696
1697         /**
1698          * Output preview text only. This can be sucked into the edit page
1699          * via JavaScript, and saves the server time rendering the skin as
1700          * well as theoretically being more robust on the client (doesn't
1701          * disturb the edit box's undo history, won't eat your text on
1702          * failure, etc).
1703          *
1704          * @todo This doesn't include category or interlanguage links.
1705          *       Would need to enhance it a bit, maybe wrap them in XML
1706          *       or something... that might also require more skin
1707          *       initialization, so check whether that's a problem.
1708          */
1709         function livePreview() {
1710                 global $wgOut;
1711                 $wgOut->disable();
1712                 header( 'Content-type: text/xml' );
1713                 header( 'Cache-control: no-cache' );
1714                 # FIXME
1715                 echo $this->getPreviewText( );
1716                 /* To not shake screen up and down between preview and live-preview */
1717                 echo "<br style=\"clear:both;\" />\n";
1718         }
1719
1720
1721         /**
1722          * Get a diff between the current contents of the edit box and the
1723          * version of the page we're editing from.
1724          *
1725          * If this is a section edit, we'll replace the section as for final
1726          * save and then make a comparison.
1727          *
1728          * @return string HTML
1729          */
1730         function getDiff() {
1731                 $oldtext = $this->mArticle->fetchContent();
1732                 $newtext = $this->mArticle->replaceSection(
1733                         $this->section, $this->textbox1, $this->summary, $this->edittime );
1734                 $newtext = $this->mArticle->preSaveTransform( $newtext );
1735                 $oldtitle = wfMsgExt( 'currentrev', array('parseinline') );
1736                 $newtitle = wfMsgExt( 'yourtext', array('parseinline') );
1737                 if ( $oldtext !== false  || $newtext != '' ) {
1738                         $de = new DifferenceEngine( $this->mTitle );
1739                         $de->setText( $oldtext, $newtext );
1740                         $difftext = $de->getDiff( $oldtitle, $newtitle );
1741                 } else {
1742                         $difftext = '';
1743                 }
1744
1745                 return '<div id="wikiDiff">' . $difftext . '</div>';
1746         }
1747
1748         /**
1749          * Filter an input field through a Unicode de-armoring process if it
1750          * came from an old browser with known broken Unicode editing issues.
1751          *
1752          * @param WebRequest $request
1753          * @param string $field
1754          * @return string
1755          * @private
1756          */
1757         function safeUnicodeInput( $request, $field ) {
1758                 $text = rtrim( $request->getText( $field ) );
1759                 return $request->getBool( 'safemode' )
1760                         ? $this->unmakesafe( $text )
1761                         : $text;
1762         }
1763
1764         /**
1765          * Filter an output field through a Unicode armoring process if it is
1766          * going to an old browser with known broken Unicode editing issues.
1767          *
1768          * @param string $text
1769          * @return string
1770          * @private
1771          */
1772         function safeUnicodeOutput( $text ) {
1773                 global $wgContLang;
1774                 $codedText = $wgContLang->recodeForEdit( $text );
1775                 return $this->checkUnicodeCompliantBrowser()
1776                         ? $codedText
1777                         : $this->makesafe( $codedText );
1778         }
1779
1780         /**
1781          * A number of web browsers are known to corrupt non-ASCII characters
1782          * in a UTF-8 text editing environment. To protect against this,
1783          * detected browsers will be served an armored version of the text,
1784          * with non-ASCII chars converted to numeric HTML character references.
1785          *
1786          * Preexisting such character references will have a 0 added to them
1787          * to ensure that round-trips do not alter the original data.
1788          *
1789          * @param string $invalue
1790          * @return string
1791          * @private
1792          */
1793         function makesafe( $invalue ) {
1794                 // Armor existing references for reversability.
1795                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
1796
1797                 $bytesleft = 0;
1798                 $result = "";
1799                 $working = 0;
1800                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1801                         $bytevalue = ord( $invalue{$i} );
1802                         if( $bytevalue <= 0x7F ) { //0xxx xxxx
1803                                 $result .= chr( $bytevalue );
1804                                 $bytesleft = 0;
1805                         } elseif( $bytevalue <= 0xBF ) { //10xx xxxx
1806                                 $working = $working << 6;
1807                                 $working += ($bytevalue & 0x3F);
1808                                 $bytesleft--;
1809                                 if( $bytesleft <= 0 ) {
1810                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
1811                                 }
1812                         } elseif( $bytevalue <= 0xDF ) { //110x xxxx
1813                                 $working = $bytevalue & 0x1F;
1814                                 $bytesleft = 1;
1815                         } elseif( $bytevalue <= 0xEF ) { //1110 xxxx
1816                                 $working = $bytevalue & 0x0F;
1817                                 $bytesleft = 2;
1818                         } else { //1111 0xxx
1819                                 $working = $bytevalue & 0x07;
1820                                 $bytesleft = 3;
1821                         }
1822                 }
1823                 return $result;
1824         }
1825
1826         /**
1827          * Reverse the previously applied transliteration of non-ASCII characters
1828          * back to UTF-8. Used to protect data from corruption by broken web browsers
1829          * as listed in $wgBrowserBlackList.
1830          *
1831          * @param string $invalue
1832          * @return string
1833          * @private
1834          */
1835         function unmakesafe( $invalue ) {
1836                 $result = "";
1837                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1838                         if( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
1839                                 $i += 3;
1840                                 $hexstring = "";
1841                                 do {
1842                                         $hexstring .= $invalue{$i};
1843                                         $i++;
1844                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
1845
1846                                 // Do some sanity checks. These aren't needed for reversability,
1847                                 // but should help keep the breakage down if the editor
1848                                 // breaks one of the entities whilst editing.
1849                                 if ((substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6)) {
1850                                         $codepoint = hexdec($hexstring);
1851                                         $result .= codepointToUtf8( $codepoint );
1852                                 } else {
1853                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
1854                                 }
1855                         } else {
1856                                 $result .= substr( $invalue, $i, 1 );
1857                         }
1858                 }
1859                 // reverse the transform that we made for reversability reasons.
1860                 return strtr( $result, array( "&#x0" => "&#x" ) );
1861         }
1862
1863         function noCreatePermission() {
1864                 global $wgOut;
1865                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
1866                 $wgOut->addWikiText( wfMsg( 'nocreatetext' ) );
1867         }
1868
1869 }
1870
1871 ?>