includes/EditPage.php

   1 <?php
   2 /**
   3  * Contains the EditPage class
   4  * @file
   5  */
   6
   7 /**
   8  * The edit page/HTML interface (split 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  * EditPage cares about two distinct titles:
  14  * $wgTitle is the page that forms submit to, links point to,
  15  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  16  * page in the database that is actually being edited. These are
  17  * usually the same, but they are now allowed to be different.
  18  */
  19 class EditPage {
  20         const AS_SUCCESS_UPDATE                 = 200;
  21         const AS_SUCCESS_NEW_ARTICLE            = 201;
  22         const AS_HOOK_ERROR                     = 210;
  23         const AS_FILTERING                      = 211;
  24         const AS_HOOK_ERROR_EXPECTED            = 212;
  25         const AS_BLOCKED_PAGE_FOR_USER          = 215;
  26         const AS_CONTENT_TOO_BIG                = 216;
  27         const AS_USER_CANNOT_EDIT               = 217;
  28         const AS_READ_ONLY_PAGE_ANON            = 218;
  29         const AS_READ_ONLY_PAGE_LOGGED          = 219;
  30         const AS_READ_ONLY_PAGE                 = 220;
  31         const AS_RATE_LIMITED                   = 221;
  32         const AS_ARTICLE_WAS_DELETED            = 222;
  33         const AS_NO_CREATE_PERMISSION           = 223;
  34         const AS_BLANK_ARTICLE                  = 224;
  35         const AS_CONFLICT_DETECTED              = 225;
  36         const AS_SUMMARY_NEEDED                 = 226;
  37         const AS_TEXTBOX_EMPTY                  = 228;
  38         const AS_MAX_ARTICLE_SIZE_EXCEEDED      = 229;
  39         const AS_OK                             = 230;
  40         const AS_END                            = 231;
  41         const AS_SPAM_ERROR                     = 232;
  42         const AS_IMAGE_REDIRECT_ANON            = 233;
  43         const AS_IMAGE_REDIRECT_LOGGED          = 234;
  44
  45         var $mArticle;
  46         var $mTitle;
  47         var $mMetaData = '';
  48         var $isConflict = false;
  49         var $isCssJsSubpage = false;
  50         var $deletedSinceEdit = false;
  51         var $formtype;
  52         var $firsttime;
  53         var $lastDelete;
  54         var $mTokenOk = false;
  55         var $mTokenOkExceptSuffix = false;
  56         var $mTriedSave = false;
  57         var $tooBig = false;
  58         var $kblength = false;
  59         var $missingComment = false;
  60         var $missingSummary = false;
  61         var $allowBlankSummary = false;
  62         var $autoSumm = '';
  63         var $hookError = '';
  64         var $mPreviewTemplates;
  65         var $mBaseRevision = false;
  66
  67         # Form values
  68         var $save = false, $preview = false, $diff = false;
  69         var $minoredit = false, $watchthis = false, $recreate = false;
  70         var $textbox1 = '', $textbox2 = '', $summary = '';
  71         var $edittime = '', $section = '', $starttime = '';
  72         var $oldid = 0, $editintro = '', $scrolltop = null;
  73
  74         # Placeholders for text injection by hooks (must be HTML)
  75         # extensions should take care to _append_ to the present value
  76         public $editFormPageTop; // Before even the preview
  77         public $editFormTextTop;
  78         public $editFormTextBeforeContent;
  79         public $editFormTextAfterWarn;
  80         public $editFormTextAfterTools;
  81         public $editFormTextBottom;
  82
  83         /* $didSave should be set to true whenever an article was succesfully altered. */
  84         public $didSave = false;
  85
  86         public $suppressIntro = false;
  87
  88         /**
  89          * @todo document
  90          * @param $article
  91          */
  92         function EditPage( $article ) {
  93                 $this->mArticle =& $article;
  94                 $this->mTitle = $article->getTitle();
  95
  96                 # Placeholders for text injection by hooks (empty per default)
  97                 $this->editFormPageTop =
  98                 $this->editFormTextTop =
  99                 $this->editFormTextBeforeContent =
 100                 $this->editFormTextAfterWarn =
 101                 $this->editFormTextAfterTools =
 102                 $this->editFormTextBottom = "";
 103         }
 104
 105         /**
 106          * Fetch initial editing page content.
 107          * @private
 108          */
 109         function getContent( $def_text = '' ) {
 110                 global $wgOut, $wgRequest, $wgParser, $wgMessageCache;
 111
 112                 # Get variables from query string :P
 113                 $section = $wgRequest->getVal( 'section' );
 114                 $preload = $wgRequest->getVal( 'preload' );
 115                 $undoafter = $wgRequest->getVal( 'undoafter' );
 116                 $undo = $wgRequest->getVal( 'undo' );
 117
 118                 wfProfileIn( __METHOD__ );
 119
 120                 $text = '';
 121                 if( !$this->mTitle->exists() ) {
 122                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 123                                 $wgMessageCache->loadAllMessages();
 124                                 # If this is a system message, get the default text.
 125                                 $text = wfMsgWeirdKey( $this->mTitle->getText() ) ;
 126                         } else {
 127                                 # If requested, preload some text.
 128                                 $text = $this->getPreloadedText( $preload );
 129                         }
 130                         # We used to put MediaWiki:Newarticletext here if
 131                         # $text was empty at this point.
 132                         # This is now shown above the edit box instead.
 133                 } else {
 134                         // FIXME: may be better to use Revision class directly
 135                         // But don't mess with it just yet. Article knows how to
 136                         // fetch the page record from the high-priority server,
 137                         // which is needed to guarantee we don't pick up lagged
 138                         // information.
 139
 140                         $text = $this->mArticle->getContent();
 141
 142                         if ($undo > 0 && $undoafter > 0 && $undo < $undoafter) {
 143                                 # If they got undoafter and undo round the wrong way, switch them
 144                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 145                         }
 146
 147                         if ( $undo > 0 && $undo > $undoafter ) {
 148                                 # Undoing a specific edit overrides section editing; section-editing
 149                                 # doesn't work with undoing.
 150                                 if ( $undoafter ) {
 151                                         $undorev = Revision::newFromId($undo);
 152                                         $oldrev = Revision::newFromId($undoafter);
 153                                 } else {
 154                                         $undorev = Revision::newFromId($undo);
 155                                         $oldrev = $undorev ? $undorev->getPrevious() : null;
 156                                 }
 157
 158                                 # Sanity check, make sure it's the right page,
 159                                 # the revisions exist and they were not deleted.
 160                                 # Otherwise, $text will be left as-is.
 161                                 if( !is_null( $undorev ) && !is_null( $oldrev ) &&
 162                                         $undorev->getPage() == $oldrev->getPage() &&
 163                                         $undorev->getPage() == $this->mArticle->getID() &&
 164                                         !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 165                                         !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 166                                         $undorev_text = $undorev->getText();
 167                                         $oldrev_text = $oldrev->getText();
 168                                         $currev_text = $text;
 169
 170                                         if ( $currev_text != $undorev_text ) {
 171                                                 $result = wfMerge( $undorev_text, $oldrev_text, $currev_text, $text );
 172                                         } else {
 173                                                 # No use doing a merge if it's just a straight revert.
 174                                                 $text = $oldrev_text;
 175                                                 $result = true;
 176                                         }
 177                                         if( $result ) {
 178                                                 # Inform the user of our success and set an automatic edit summary
 179                                                 $this->editFormPageTop .= $wgOut->parse( wfMsgNoTrans( 'undo-success' ) );
 180                                                 $firstrev = $oldrev->getNext();
 181                                                 # If we just undid one rev, use an autosummary
 182                                                 if( $firstrev->mId == $undo ) {
 183                                                         $this->summary = wfMsgForContent('undo-summary', $undo, $undorev->getUserText());
 184                                                 }
 185                                                 $this->formtype = 'diff';
 186                                         } else {
 187                                                 # Warn the user that something went wrong
 188                                                 $this->editFormPageTop .= $wgOut->parse( wfMsgNoTrans( 'undo-failure' ) );
 189                                         }
 190                                 } else {
 191                                         // Failed basic sanity checks.
 192                                         // Older revisions may have been removed since the link
 193                                         // was created, or we may simply have got bogus input.
 194                                         $this->editFormPageTop .= $wgOut->parse( wfMsgNoTrans( 'undo-norev' ) );
 195                                 }
 196                         } else if( $section != '' ) {
 197                                 if( $section == 'new' ) {
 198                                         $text = $this->getPreloadedText( $preload );
 199                                 } else {
 200                                         $text = $wgParser->getSection( $text, $section, $def_text );
 201                                 }
 202                         }
 203                 }
 204
 205                 wfProfileOut( __METHOD__ );
 206                 return $text;
 207         }
 208
 209         /**
 210          * Get the contents of a page from its title and remove includeonly tags
 211          *
 212          * @param $preload String: the title of the page.
 213          * @return string The contents of the page.
 214          */
 215         protected function getPreloadedText($preload) {
 216                 if ( $preload === '' )
 217                         return '';
 218                 else {
 219                         $preloadTitle = Title::newFromText( $preload );
 220                         if ( isset( $preloadTitle ) && $preloadTitle->userCanRead() ) {
 221                                 $rev=Revision::newFromTitle($preloadTitle);
 222                                 if ( is_object( $rev ) ) {
 223                                         $text = $rev->getText();
 224                                         // TODO FIXME: AAAAAAAAAAA, this shouldn't be implementing
 225                                         // its own mini-parser! -ævar
 226                                         $text = preg_replace( '~</?includeonly>~', '', $text );
 227                                         return $text;
 228                                 } else
 229                                         return '';
 230                         }
 231                 }
 232         }
 233
 234         /**
 235          * This is the function that extracts metadata from the article body on the first view.
 236          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
 237          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
 238          */
 239         function extractMetaDataFromArticle () {
 240                 global $wgUseMetadataEdit , $wgMetadataWhitelist , $wgLang ;
 241                 $this->mMetaData = '' ;
 242                 if ( !$wgUseMetadataEdit ) return ;
 243                 if ( $wgMetadataWhitelist == '' ) return ;
 244                 $s = '' ;
 245                 $t = $this->getContent();
 246
 247                 # MISSING : <nowiki> filtering
 248
 249                 # Categories and language links
 250                 $t = explode ( "\n" , $t ) ;
 251                 $catlow = strtolower ( $wgLang->getNsText ( NS_CATEGORY ) ) ;
 252                 $cat = $ll = array() ;
 253                 foreach ( $t AS $key => $x )
 254                 {
 255                         $y = trim ( strtolower ( $x ) ) ;
 256                         while ( substr ( $y , 0 , 2 ) == '[[' )
 257                         {
 258                                 $y = explode ( ']]' , trim ( $x ) ) ;
 259                                 $first = array_shift ( $y ) ;
 260                                 $first = explode ( ':' , $first ) ;
 261                                 $ns = array_shift ( $first ) ;
 262                                 $ns = trim ( str_replace ( '[' , '' , $ns ) ) ;
 263                                 if ( strlen ( $ns ) == 2 OR strtolower ( $ns ) == $catlow )
 264                                 {
 265                                         $add = '[[' . $ns . ':' . implode ( ':' , $first ) . ']]' ;
 266                                         if ( strtolower ( $ns ) == $catlow ) $cat[] = $add ;
 267                                         else $ll[] = $add ;
 268                                         $x = implode ( ']]' , $y ) ;
 269                                         $t[$key] = $x ;
 270                                         $y = trim ( strtolower ( $x ) ) ;
 271                                 }
 272                         }
 273                 }
 274                 if ( count ( $cat ) ) $s .= implode ( ' ' , $cat ) . "\n" ;
 275                 if ( count ( $ll ) ) $s .= implode ( ' ' , $ll ) . "\n" ;
 276                 $t = implode ( "\n" , $t ) ;
 277
 278                 # Load whitelist
 279                 $sat = array () ; # stand-alone-templates; must be lowercase
 280                 $wl_title = Title::newFromText ( $wgMetadataWhitelist ) ;
 281                 $wl_article = new Article ( $wl_title ) ;
 282                 $wl = explode ( "\n" , $wl_article->getContent() ) ;
 283                 foreach ( $wl AS $x )
 284                 {
 285                         $isentry = false ;
 286                         $x = trim ( $x ) ;
 287                         while ( substr ( $x , 0 , 1 ) == '*' )
 288                         {
 289                                 $isentry = true ;
 290                                 $x = trim ( substr ( $x , 1 ) ) ;
 291                         }
 292                         if ( $isentry )
 293                         {
 294                                 $sat[] = strtolower ( $x ) ;
 295                         }
 296
 297                 }
 298
 299                 # Templates, but only some
 300                 $t = explode ( '{{' , $t ) ;
 301                 $tl = array () ;
 302                 foreach ( $t AS $key => $x )
 303                 {
 304                         $y = explode ( '}}' , $x , 2 ) ;
 305                         if ( count ( $y ) == 2 )
 306                         {
 307                                 $z = $y[0] ;
 308                                 $z = explode ( '|' , $z ) ;
 309                                 $tn = array_shift ( $z ) ;
 310                                 if ( in_array ( strtolower ( $tn ) , $sat ) )
 311                                 {
 312                                         $tl[] = '{{' . $y[0] . '}}' ;
 313                                         $t[$key] = $y[1] ;
 314                                         $y = explode ( '}}' , $y[1] , 2 ) ;
 315                                 }
 316                                 else $t[$key] = '{{' . $x ;
 317                         }
 318                         else if ( $key != 0 ) $t[$key] = '{{' . $x ;
 319                         else $t[$key] = $x ;
 320                 }
 321                 if ( count ( $tl ) ) $s .= implode ( ' ' , $tl ) ;
 322                 $t = implode ( '' , $t ) ;
 323
 324                 $t = str_replace ( "\n\n\n" , "\n" , $t ) ;
 325                 $this->mArticle->mContent = $t ;
 326                 $this->mMetaData = $s ;
 327         }
 328
 329         protected function wasDeletedSinceLastEdit() {
 330                 /* Note that we rely on the logging table, which hasn't been always there,
 331                  * but that doesn't matter, because this only applies to brand new
 332                  * deletes.
 333                  */
 334                 if ( $this->deletedSinceEdit )
 335                         return true;
 336                 if ( $this->mTitle->isDeleted() ) {
 337                         $this->lastDelete = $this->getLastDelete();
 338                         if ( !is_null($this->lastDelete) ) {
 339                                 $deletetime = $this->lastDelete->log_timestamp;
 340                                 if ( ($deletetime - $this->starttime) > 0 ) {
 341                                         $this->deletedSinceEdit = true;
 342                                 }
 343                         }
 344                 }
 345                 return $this->deletedSinceEdit;
 346         }
 347
 348         function submit() {
 349                 $this->edit();
 350         }
 351
 352         /**
 353          * This is the function that gets called for "action=edit". It
 354          * sets up various member variables, then passes execution to
 355          * another function, usually showEditForm()
 356          *
 357          * The edit form is self-submitting, so that when things like
 358          * preview and edit conflicts occur, we get the same form back
 359          * with the extra stuff added.  Only when the final submission
 360          * is made and all is well do we actually save and redirect to
 361          * the newly-edited page.
 362          */
 363         function edit() {
 364                 global $wgOut, $wgUser, $wgRequest;
 365
 366                 if ( !wfRunHooks( 'AlternateEdit', array( &$this ) ) )
 367                         return;
 368
 369                 wfProfileIn( __METHOD__ );
 370                 wfDebug( __METHOD__.": enter\n" );
 371
 372                 // this is not an article
 373                 $wgOut->setArticleFlag( false );
 374
 375                 $this->importFormData( $wgRequest );
 376                 $this->firsttime = false;
 377
 378                 if( $this->live ) {
 379                         $this->livePreview();
 380                         wfProfileOut( __METHOD__ );
 381                         return;
 382                 }
 383
 384                 if( wfReadOnly() ) {
 385                         if( $this->save ){
 386                                 // Force preview
 387                                 $this->save = false;
 388                                 $this->preview = true;
 389                         } elseif( $this->preview || $this->diff ){
 390                                 // A warning will be displayed instead
 391                         } else {
 392                                 $this->readOnlyPage( $this->getContent() );
 393                                 wfProfileOut( __METHOD__ );
 394                                 return;
 395                         }
 396                 }
 397
 398                 $wgOut->addScriptFile( 'edit.js' );
 399
 400                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 401
 402                 if( !$this->mTitle->exists() ) {
 403                         $permErrors = array_merge( $permErrors,
 404                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 405                 }
 406
 407                 # Ignore some permissions errors.
 408                 $remove = array();
 409                 foreach( $permErrors as $error ) {
 410                         if ( ( $this->preview || $this->diff ) &&
 411                                 ($error[0] == 'blockedtext' || $error[0] == 'autoblockedtext'))
 412                         {
 413                                 // Don't worry about blocks when previewing/diffing
 414                                 $remove[] = $error;
 415                         }
 416                 }
 417                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 418
 419                 if ( $permErrors ) {
 420                         wfDebug( __METHOD__.": User can't edit\n" );
 421                         $this->readOnlyPage( $this->getContent(), true, $permErrors, 'edit' );
 422                         wfProfileOut( __METHOD__ );
 423                         return;
 424                 } else {
 425                         if ( $this->save ) {
 426                                 $this->formtype = 'save';
 427                         } else if( $this->preview ) {
 428                                 $this->formtype = 'preview';
 429                         } else if ( $this->diff ) {
 430                                 $this->formtype = 'diff';
 431                         } else { # First time through
 432                                 $this->firsttime = true;
 433                                 if( $this->previewOnOpen() ) {
 434                                         $this->formtype = 'preview';
 435                                 } else {
 436                                         $this->extractMetaDataFromArticle () ;
 437                                         $this->formtype = 'initial';
 438                                 }
 439                         }
 440                 }
 441
 442                 wfProfileIn( __METHOD__."-business-end" );
 443
 444                 $this->isConflict = false;
 445                 // css / js subpages of user pages get a special treatment
 446                 $this->isCssJsSubpage      = $this->mTitle->isCssJsSubpage();
 447                 $this->isValidCssJsSubpage = $this->mTitle->isValidCssJsSubpage();
 448
 449                 # Show applicable editing introductions
 450                 if( $this->formtype == 'initial' || $this->firsttime )
 451                         $this->showIntro();
 452
 453                 if( $this->mTitle->isTalkPage() ) {
 454                         $wgOut->addWikiMsg( 'talkpagetext' );
 455                 }
 456
 457                 # Optional notices on a per-namespace and per-page basis
 458                 $editnotice_ns   = 'editnotice-'.$this->mTitle->getNamespace();
 459                 $editnotice_page = $editnotice_ns.'-'.$this->mTitle->getDBkey();
 460                 if ( !wfEmptyMsg( $editnotice_ns, wfMsgForContent( $editnotice_ns ) ) ) {
 461                         $wgOut->addWikiText( wfMsgForContent( $editnotice_ns )  );
 462                 }
 463                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
 464                         $parts = explode( '/', $this->mTitle->getDBkey() );
 465                         $editnotice_base = $editnotice_ns;
 466                         while ( count( $parts ) > 0 ) {
 467                                 $editnotice_base .= '-'.array_shift( $parts );
 468                                 if ( !wfEmptyMsg( $editnotice_base, wfMsgForContent( $editnotice_base ) ) ) {
 469                                         $wgOut->addWikiText( wfMsgForContent( $editnotice_base )  );
 470                                 }
 471                         }
 472                 } else if ( !wfEmptyMsg( $editnotice_page, wfMsgForContent( $editnotice_page ) ) ) {
 473                         $wgOut->addWikiText( wfMsgForContent( $editnotice_page ) );
 474                 }
 475
 476                 # Attempt submission here.  This will check for edit conflicts,
 477                 # and redundantly check for locked database, blocked IPs, etc.
 478                 # that edit() already checked just in case someone tries to sneak
 479                 # in the back door with a hand-edited submission URL.
 480
 481                 if ( 'save' == $this->formtype ) {
 482                         if ( !$this->attemptSave() ) {
 483                                 wfProfileOut( __METHOD__."-business-end" );
 484                                 wfProfileOut( __METHOD__ );
 485                                 return;
 486                         }
 487                 }
 488
 489                 # First time through: get contents, set time for conflict
 490                 # checking, etc.
 491                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 492                         if ($this->initialiseForm() === false) {
 493                                 $this->noSuchSectionPage();
 494                                 wfProfileOut( __METHOD__."-business-end" );
 495                                 wfProfileOut( __METHOD__ );
 496                                 return;
 497                         }
 498                         if( !$this->mTitle->getArticleId() )
 499                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 500                 }
 501
 502                 $this->showEditForm();
 503                 wfProfileOut( __METHOD__."-business-end" );
 504                 wfProfileOut( __METHOD__ );
 505         }
 506
 507         /**
 508          * Show a read-only error
 509          * Parameters are the same as OutputPage:readOnlyPage()
 510          * Redirect to the article page if redlink=1
 511          */
 512         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 513                 global $wgRequest, $wgOut;
 514                 if ( $wgRequest->getBool( 'redlink' ) ) {
 515                         // The edit page was reached via a red link.
 516                         // Redirect to the article page and let them click the edit tab if
 517                         // they really want a permission error.
 518                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 519                 } else {
 520                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 521                 }
 522         }
 523
 524         /**
 525          * Should we show a preview when the edit form is first shown?
 526          *
 527          * @return bool
 528          */
 529         protected function previewOnOpen() {
 530                 global $wgRequest, $wgUser;
 531                 if( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 532                         // Explicit override from request
 533                         return true;
 534                 } elseif( $wgRequest->getVal( 'preview' ) == 'no' ) {
 535                         // Explicit override from request
 536                         return false;
 537                 } elseif( $this->section == 'new' ) {
 538                         // Nothing *to* preview for new sections
 539                         return false;
 540                 } elseif( ( $wgRequest->getVal( 'preload' ) !== '' || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 541                         // Standard preference behaviour
 542                         return true;
 543                 } elseif( !$this->mTitle->exists() && $this->mTitle->getNamespace() == NS_CATEGORY ) {
 544                         // Categories are special
 545                         return true;
 546                 } else {
 547                         return false;
 548                 }
 549         }
 550
 551         /**
 552          * @todo document
 553          * @param $request
 554          */
 555         function importFormData( &$request ) {
 556                 global $wgLang, $wgUser;
 557                 $fname = 'EditPage::importFormData';
 558                 wfProfileIn( $fname );
 559
 560                 # Section edit can come from either the form or a link
 561                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 562
 563                 if( $request->wasPosted() ) {
 564                         # These fields need to be checked for encoding.
 565                         # Also remove trailing whitespace, but don't remove _initial_
 566                         # whitespace from the text boxes. This may be significant formatting.
 567                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 568                         $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
 569                         $this->mMetaData = rtrim( $request->getText( 'metadata' ) );
 570                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 571                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary'  ), 250 );
 572
 573                         # Remove extra headings from summaries and new sections.
 574                         $this->summary = preg_replace('/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary);
 575
 576                         $this->edittime = $request->getVal( 'wpEdittime' );
 577                         $this->starttime = $request->getVal( 'wpStarttime' );
 578
 579                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 580
 581                         if( is_null( $this->edittime ) ) {
 582                                 # If the form is incomplete, force to preview.
 583                                 wfDebug( "$fname: Form data appears to be incomplete\n" );
 584                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 585                                 $this->preview  = true;
 586                         } else {
 587                                 /* Fallback for live preview */
 588                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 589                                 $this->diff = $request->getCheck( 'wpDiff' );
 590
 591                                 // Remember whether a save was requested, so we can indicate
 592                                 // if we forced preview due to session failure.
 593                                 $this->mTriedSave = !$this->preview;
 594
 595                                 if ( $this->tokenOk( $request ) ) {
 596                                         # Some browsers will not report any submit button
 597                                         # if the user hits enter in the comment box.
 598                                         # The unmarked state will be assumed to be a save,
 599                                         # if the form seems otherwise complete.
 600                                         wfDebug( "$fname: Passed token check.\n" );
 601                                 } else if ( $this->diff ) {
 602                                         # Failed token check, but only requested "Show Changes".
 603                                         wfDebug( "$fname: Failed token check; Show Changes requested.\n" );
 604                                 } else {
 605                                         # Page might be a hack attempt posted from
 606                                         # an external site. Preview instead of saving.
 607                                         wfDebug( "$fname: Failed token check; forcing preview\n" );
 608                                         $this->preview = true;
 609                                 }
 610                         }
 611                         $this->save = !$this->preview && !$this->diff;
 612                         if( !preg_match( '/^\d{14}$/', $this->edittime )) {
 613                                 $this->edittime = null;
 614                         }
 615
 616                         if( !preg_match( '/^\d{14}$/', $this->starttime )) {
 617                                 $this->starttime = null;
 618                         }
 619
 620                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 621
 622                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 623                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 624
 625                         # Don't force edit summaries when a user is editing their own user or talk page
 626                         if( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) && $this->mTitle->getText() == $wgUser->getName() ) {
 627                                 $this->allowBlankSummary = true;
 628                         } else {
 629                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' );
 630                         }
 631
 632                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 633                 } else {
 634                         # Not a posted form? Start with nothing.
 635                         wfDebug( "$fname: Not a posted form.\n" );
 636                         $this->textbox1  = '';
 637                         $this->textbox2  = '';
 638                         $this->mMetaData = '';
 639                         $this->summary   = '';
 640                         $this->edittime  = '';
 641                         $this->starttime = wfTimestampNow();
 642                         $this->edit      = false;
 643                         $this->preview   = false;
 644                         $this->save      = false;
 645                         $this->diff      = false;
 646                         $this->minoredit = false;
 647                         $this->watchthis = false;
 648                         $this->recreate  = false;
 649
 650                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 651                                 $this->summary = $request->getVal( 'preloadtitle' );
 652                         }
 653                 }
 654
 655                 $this->oldid = $request->getInt( 'oldid' );
 656
 657                 $this->live = $request->getCheck( 'live' );
 658                 $this->editintro = $request->getText( 'editintro' );
 659
 660                 wfProfileOut( $fname );
 661         }
 662
 663         /**
 664          * Make sure the form isn't faking a user's credentials.
 665          *
 666          * @param $request WebRequest
 667          * @return bool
 668          * @private
 669          */
 670         function tokenOk( &$request ) {
 671                 global $wgUser;
 672                 $token = $request->getVal( 'wpEditToken' );
 673                 $this->mTokenOk = $wgUser->matchEditToken( $token );
 674                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
 675                 return $this->mTokenOk;
 676         }
 677
 678         /**
 679          * Show all applicable editing introductions
 680          */
 681         protected function showIntro() {
 682                 global $wgOut, $wgUser;
 683                 if( $this->suppressIntro )
 684                         return;
 685
 686                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exists
 687                 if( $this->mTitle->getNamespace() == NS_USER || $this->mTitle->getNamespace() == NS_USER_TALK ) {
 688                         $parts = explode( '/', $this->mTitle->getText(), 2 );
 689                         $username = $parts[0];
 690                         $id = User::idFromName( $username );
 691                         $ip = User::isIP( $username );
 692
 693                         if ( $id == 0 && !$ip ) {
 694                                 $wgOut->wrapWikiMsg( '<div class="mw-userpage-userdoesnotexist error">$1</div>',
 695                                         array( 'userpage-userdoesnotexist', $username ) );
 696                         }
 697                 }
 698
 699                 if( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
 700                         if( $wgUser->isLoggedIn() ) {
 701                                 $wgOut->wrapWikiMsg( '<div class="mw-newarticletext">$1</div>', 'newarticletext' );
 702                         } else {
 703                                 $wgOut->wrapWikiMsg( '<div class="mw-newarticletextanon">$1</div>', 'newarticletextanon' );
 704                         }
 705                         $this->showDeletionLog( $wgOut );
 706                 }
 707         }
 708
 709         /**
 710          * Attempt to show a custom editing introduction, if supplied
 711          *
 712          * @return bool
 713          */
 714         protected function showCustomIntro() {
 715                 if( $this->editintro ) {
 716                         $title = Title::newFromText( $this->editintro );
 717                         if( $title instanceof Title && $title->exists() && $title->userCanRead() ) {
 718                                 global $wgOut;
 719                                 $revision = Revision::newFromTitle( $title );
 720                                 $wgOut->addWikiTextTitleTidy( $revision->getText(), $this->mTitle );
 721                                 return true;
 722                         } else {
 723                                 return false;
 724                         }
 725                 } else {
 726                         return false;
 727                 }
 728         }
 729
 730         /**
 731          * Attempt submission (no UI)
 732          * @return one of the constants describing the result
 733          */
 734         function internalAttemptSave( &$result, $bot = false ) {
 735                 global $wgFilterCallback, $wgUser, $wgOut, $wgParser;
 736                 global $wgMaxArticleSize;
 737
 738                 $fname = 'EditPage::attemptSave';
 739                 wfProfileIn( $fname );
 740                 wfProfileIn( "$fname-checks" );
 741
 742                 if( !wfRunHooks( 'EditPage::attemptSave', array( &$this ) ) )
 743                 {
 744                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving" );
 745                         return self::AS_HOOK_ERROR;
 746                 }
 747
 748                 # Check image redirect
 749                 if ( $this->mTitle->getNamespace() == NS_IMAGE &&
 750                         Title::newFromRedirect( $this->textbox1 ) instanceof Title &&
 751                         !$wgUser->isAllowed( 'upload' ) ) {
 752                                 if( $wgUser->isAnon() ) {
 753                                         return self::AS_IMAGE_REDIRECT_ANON;
 754                                 } else {
 755                                         return self::AS_IMAGE_REDIRECT_LOGGED;
 756                                 }
 757                 }
 758
 759                 # Reintegrate metadata
 760                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 761                 $this->mMetaData = '' ;
 762
 763                 # Check for spam
 764                 $match = self::matchSpamRegex( $this->summary );
 765                 if( $match === false ) {
 766                         $match = self::matchSpamRegex( $this->textbox1 );
 767                 }
 768                 if( $match !== false ) {
 769                         $result['spam'] = $match;
 770                         $ip = wfGetIP();
 771                         $pdbk = $this->mTitle->getPrefixedDBkey();
 772                         $match = str_replace( "\n", '', $match );
 773                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
 774                         wfProfileOut( "$fname-checks" );
 775                         wfProfileOut( $fname );
 776                         return self::AS_SPAM_ERROR;
 777                 }
 778                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
 779                         # Error messages or other handling should be performed by the filter function
 780                         wfProfileOut( "$fname-checks" );
 781                         wfProfileOut( $fname );
 782                         return self::AS_FILTERING;
 783                 }
 784                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
 785                         # Error messages etc. could be handled within the hook...
 786                         wfProfileOut( "$fname-checks" );
 787                         wfProfileOut( $fname );
 788                         return self::AS_HOOK_ERROR;
 789                 } elseif( $this->hookError != '' ) {
 790                         # ...or the hook could be expecting us to produce an error
 791                         wfProfileOut( "$fname-checks" );
 792                         wfProfileOut( $fname );
 793                         return self::AS_HOOK_ERROR_EXPECTED;
 794                 }
 795                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 796                         # Check block state against master, thus 'false'.
 797                         wfProfileOut( "$fname-checks" );
 798                         wfProfileOut( $fname );
 799                         return self::AS_BLOCKED_PAGE_FOR_USER;
 800                 }
 801                 $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 802                 if ( $this->kblength > $wgMaxArticleSize ) {
 803                         // Error will be displayed by showEditForm()
 804                         $this->tooBig = true;
 805                         wfProfileOut( "$fname-checks" );
 806                         wfProfileOut( $fname );
 807                         return self::AS_CONTENT_TOO_BIG;
 808                 }
 809
 810                 if ( !$wgUser->isAllowed('edit') ) {
 811                         if ( $wgUser->isAnon() ) {
 812                                 wfProfileOut( "$fname-checks" );
 813                                 wfProfileOut( $fname );
 814                                 return self::AS_READ_ONLY_PAGE_ANON;
 815                         }
 816                         else {
 817                                 wfProfileOut( "$fname-checks" );
 818                                 wfProfileOut( $fname );
 819                                 return self::AS_READ_ONLY_PAGE_LOGGED;
 820                         }
 821                 }
 822
 823                 if ( wfReadOnly() ) {
 824                         wfProfileOut( "$fname-checks" );
 825                         wfProfileOut( $fname );
 826                         return self::AS_READ_ONLY_PAGE;
 827                 }
 828                 if ( $wgUser->pingLimiter() ) {
 829                         wfProfileOut( "$fname-checks" );
 830                         wfProfileOut( $fname );
 831                         return self::AS_RATE_LIMITED;
 832                 }
 833
 834                 # If the article has been deleted while editing, don't save it without
 835                 # confirmation
 836                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
 837                         wfProfileOut( "$fname-checks" );
 838                         wfProfileOut( $fname );
 839                         return self::AS_ARTICLE_WAS_DELETED;
 840                 }
 841
 842                 wfProfileOut( "$fname-checks" );
 843
 844                 # If article is new, insert it.
 845                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 846                 if ( 0 == $aid ) {
 847
 848                         // Late check for create permission, just in case *PARANOIA*
 849                         if ( !$this->mTitle->userCan( 'create' ) ) {
 850                                 wfDebug( "$fname: no create permission\n" );
 851                                 wfProfileOut( $fname );
 852                                 return self::AS_NO_CREATE_PERMISSION;
 853                         }
 854
 855                         # Don't save a new article if it's blank.
 856                         if ( '' == $this->textbox1 ) {
 857                                         wfProfileOut( $fname );
 858                                         return self::AS_BLANK_ARTICLE;
 859                         }
 860
 861                         // Run post-section-merge edit filter
 862                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
 863                                 # Error messages etc. could be handled within the hook...
 864                                 wfProfileOut( $fname );
 865                                 return self::AS_HOOK_ERROR;
 866                         }
 867
 868                         $isComment = ( $this->section == 'new' );
 869
 870                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 871                                 $this->minoredit, $this->watchthis, false, $isComment, $bot);
 872
 873                         wfProfileOut( $fname );
 874                         return self::AS_SUCCESS_NEW_ARTICLE;
 875                 }
 876
 877                 # Article exists. Check for edit conflict.
 878
 879                 $this->mArticle->clear(); # Force reload of dates, etc.
 880                 $this->mArticle->forUpdate( true ); # Lock the article
 881
 882                 wfDebug("timestamp: {$this->mArticle->getTimestamp()}, edittime: {$this->edittime}\n");
 883
 884                 if( $this->mArticle->getTimestamp() != $this->edittime ) {
 885                         $this->isConflict = true;
 886                         if( $this->section == 'new' ) {
 887                                 if( $this->mArticle->getUserText() == $wgUser->getName() &&
 888                                         $this->mArticle->getComment() == $this->summary ) {
 889                                         // Probably a duplicate submission of a new comment.
 890                                         // This can happen when squid resends a request after
 891                                         // a timeout but the first one actually went through.
 892                                         wfDebug( "EditPage::editForm duplicate new section submission; trigger edit conflict!\n" );
 893                                 } else {
 894                                         // New comment; suppress conflict.
 895                                         $this->isConflict = false;
 896                                         wfDebug( "EditPage::editForm conflict suppressed; new section\n" );
 897                                 }
 898                         }
 899                 }
 900                 $userid = $wgUser->getId();
 901
 902                 if ( $this->isConflict) {
 903                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 904                                 $this->mArticle->getTimestamp() . "')\n" );
 905                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime);
 906                 }
 907                 else {
 908                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 909                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary);
 910                 }
 911                 if( is_null( $text ) ) {
 912                         wfDebug( "EditPage::editForm activating conflict; section replace failed.\n" );
 913                         $this->isConflict = true;
 914                         $text = $this->textbox1;
 915                 }
 916
 917                 # Suppress edit conflict with self, except for section edits where merging is required.
 918                 if ( ( $this->section == '' ) && ( 0 != $userid ) && ( $this->mArticle->getUser() == $userid ) ) {
 919                         wfDebug( "EditPage::editForm Suppressing edit conflict, same user.\n" );
 920                         $this->isConflict = false;
 921                 } else {
 922                         # switch from section editing to normal editing in edit conflict
 923                         if($this->isConflict) {
 924                                 # Attempt merge
 925                                 if( $this->mergeChangesInto( $text ) ){
 926                                         // Successful merge! Maybe we should tell the user the good news?
 927                                         $this->isConflict = false;
 928                                         wfDebug( "EditPage::editForm Suppressing edit conflict, successful merge.\n" );
 929                                 } else {
 930                                         $this->section = '';
 931                                         $this->textbox1 = $text;
 932                                         wfDebug( "EditPage::editForm Keeping edit conflict, failed merge.\n" );
 933                                 }
 934                         }
 935                 }
 936
 937                 if ( $this->isConflict ) {
 938                         wfProfileOut( $fname );
 939                         return self::AS_CONFLICT_DETECTED;
 940                 }
 941
 942                 $oldtext = $this->mArticle->getContent();
 943
 944                 // Run post-section-merge edit filter
 945                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$this->hookError, $this->summary ) ) ) {
 946                         # Error messages etc. could be handled within the hook...
 947                         wfProfileOut( $fname );
 948                         return self::AS_HOOK_ERROR;
 949                 }
 950
 951                 # Handle the user preference to force summaries here, but not for null edits
 952                 if( $this->section != 'new' && !$this->allowBlankSummary &&  $wgUser->getOption( 'forceeditsummary') &&
 953                         0 != strcmp($oldtext, $text) &&
 954                         !is_object( Title::newFromRedirect( $text ) ) # check if it's not a redirect
 955                 ) {
 956
 957                         if( md5( $this->summary ) == $this->autoSumm ) {
 958                                 $this->missingSummary = true;
 959                                 wfProfileOut( $fname );
 960                                 return self::AS_SUMMARY_NEEDED;
 961                         }
 962                 }
 963
 964                 # And a similar thing for new sections
 965                 if( $this->section == 'new' && !$this->allowBlankSummary && $wgUser->getOption( 'forceeditsummary' ) ) {
 966                         if (trim($this->summary) == '') {
 967                                 $this->missingSummary = true;
 968                                 wfProfileOut( $fname );
 969                                 return self::AS_SUMMARY_NEEDED;
 970                         }
 971                 }
 972
 973                 # All's well
 974                 wfProfileIn( "$fname-sectionanchor" );
 975                 $sectionanchor = '';
 976                 if( $this->section == 'new' ) {
 977                         if ( $this->textbox1 == '' ) {
 978                                 $this->missingComment = true;
 979                                 return self::AS_TEXTBOX_EMPTY;
 980                         }
 981                         if( $this->summary != '' ) {
 982                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $this->summary );
 983                                 # This is a new section, so create a link to the new section
 984                                 # in the revision summary.
 985                                 $cleanSummary = $wgParser->stripSectionName( $this->summary );
 986                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
 987                         }
 988                 } elseif( $this->section != '' ) {
 989                         # Try to get a section anchor from the section source, redirect to edited section if header found
 990                         # XXX: might be better to integrate this into Article::replaceSection
 991                         # for duplicate heading checking and maybe parsing
 992                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 993                         # we can't deal with anchors, includes, html etc in the header for now,
 994                         # headline would need to be parsed to improve this
 995                         if($hasmatch and strlen($matches[2]) > 0) {
 996                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $matches[2] );
 997                         }
 998                 }
 999                 wfProfileOut( "$fname-sectionanchor" );
1000
1001                 // Save errors may fall down to the edit form, but we've now
1002                 // merged the section into full text. Clear the section field
1003                 // so that later submission of conflict forms won't try to
1004                 // replace that into a duplicated mess.
1005                 $this->textbox1 = $text;
1006                 $this->section = '';
1007
1008                 // Check for length errors again now that the section is merged in
1009                 $this->kblength = (int)(strlen( $text ) / 1024);
1010                 if ( $this->kblength > $wgMaxArticleSize ) {
1011                         $this->tooBig = true;
1012                         wfProfileOut( $fname );
1013                         return self::AS_MAX_ARTICLE_SIZE_EXCEEDED;
1014                 }
1015
1016                 # update the article here
1017                 if( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
1018                         $this->watchthis, $bot, $sectionanchor ) ) {
1019                         wfProfileOut( $fname );
1020                         return self::AS_SUCCESS_UPDATE;
1021                 } else {
1022                         $this->isConflict = true;
1023                 }
1024                 wfProfileOut( $fname );
1025                 return self::AS_END;
1026         }
1027
1028         /**
1029          * Check given input text against $wgSpamRegex, and return the text of the first match.
1030          * @return mixed -- matching string or false
1031          */
1032         public static function matchSpamRegex( $text ) {
1033                 global $wgSpamRegex;
1034                 if( $wgSpamRegex ) {
1035                         // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1036                         $regexes = (array)$wgSpamRegex;
1037                         foreach( $regexes as $regex ) {
1038                                 $matches = array();
1039                                 if ( preg_match( $regex, $text, $matches ) ) {
1040                                         return $matches[0];
1041                                 }
1042                         }
1043                 }
1044                 return false;
1045         }
1046
1047         /**
1048          * Initialise form fields in the object
1049          * Called on the first invocation, e.g. when a user clicks an edit link
1050          */
1051         function initialiseForm() {
1052                 $this->edittime = $this->mArticle->getTimestamp();
1053                 $this->textbox1 = $this->getContent(false);
1054                 if ($this->textbox1 === false) return false;
1055
1056                 if ( !$this->mArticle->exists() && $this->mTitle->getNamespace() == NS_MEDIAWIKI )
1057                         $this->textbox1 = wfMsgWeirdKey( $this->mTitle->getText() );
1058                 wfProxyCheck();
1059                 return true;
1060         }
1061
1062         /**
1063          * Send the edit form and related headers to $wgOut
1064          * @param $formCallback Optional callable that takes an OutputPage
1065          *                      parameter; will be called during form output
1066          *                      near the top, for captchas and the like.
1067          */
1068         function showEditForm( $formCallback=null ) {
1069                 global $wgOut, $wgUser, $wgLang, $wgContLang, $wgMaxArticleSize, $wgTitle;
1070
1071                 # If $wgTitle is null, that means we're in API mode.
1072                 # Some hook probably called this function  without checking
1073                 # for is_null($wgTitle) first. Bail out right here so we don't
1074                 # do lots of work just to discard it right after.
1075                 if(is_null($wgTitle))
1076                         return;
1077
1078                 $fname = 'EditPage::showEditForm';
1079                 wfProfileIn( $fname );
1080
1081                 $sk = $wgUser->getSkin();
1082
1083                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) ) ;
1084
1085                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1086
1087                 # Enabled article-related sidebar, toplinks, etc.
1088                 $wgOut->setArticleRelated( true );
1089
1090                 if ( $this->formtype == 'preview' ) {
1091                         $wgOut->setPageTitleActionText( wfMsg( 'preview' ) );
1092                 }
1093
1094                 if ( $this->isConflict ) {
1095                         $s = wfMsg( 'editconflict', $wgTitle->getPrefixedText() );
1096                         $wgOut->setPageTitle( $s );
1097                         $wgOut->addWikiMsg( 'explainconflict' );
1098
1099                         $this->textbox2 = $this->textbox1;
1100                         $this->textbox1 = $this->getContent();
1101                         $this->edittime = $this->mArticle->getTimestamp();
1102                 } else {
1103                         if( $this->section != '' ) {
1104                                 if( $this->section == 'new' ) {
1105                                         $s = wfMsg('editingcomment', $wgTitle->getPrefixedText() );
1106                                 } else {
1107                                         $s = wfMsg('editingsection', $wgTitle->getPrefixedText() );
1108                                         $matches = array();
1109                                         if( !$this->summary && !$this->preview && !$this->diff ) {
1110                                                 preg_match( "/^(=+)(.+)\\1/mi",
1111                                                         $this->textbox1,
1112                                                         $matches );
1113                                                 if( !empty( $matches[2] ) ) {
1114                                                         global $wgParser;
1115                                                         $this->summary = "/* " .
1116                                                                 $wgParser->stripSectionName(trim($matches[2])) .
1117                                                                 " */ ";
1118                                                 }
1119                                         }
1120                                 }
1121                         } else {
1122                                 $s = wfMsg( 'editing', $wgTitle->getPrefixedText() );
1123                         }
1124                         $wgOut->setPageTitle( $s );
1125
1126                         if ( $this->missingComment ) {
1127                                 $wgOut->wrapWikiMsg( '<div id="mw-missingcommenttext">$1</div>',  'missingcommenttext' );
1128                         }
1129
1130                         if( $this->missingSummary && $this->section != 'new' ) {
1131                                 $wgOut->wrapWikiMsg( '<div id="mw-missingsummary">$1</div>', 'missingsummary' );
1132                         }
1133
1134                         if( $this->missingSummary && $this->section == 'new' ) {
1135                                 $wgOut->wrapWikiMsg( '<div id="mw-missingcommentheader">$1</div>', 'missingcommentheader' );
1136                         }
1137
1138                         if( $this->hookError !== '' ) {
1139                                 $wgOut->addWikiText( $this->hookError );
1140                         }
1141
1142                         if ( !$this->checkUnicodeCompliantBrowser() ) {
1143                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
1144                         }
1145                         if ( isset( $this->mArticle ) && isset( $this->mArticle->mRevision ) ) {
1146                         // Let sysop know that this will make private content public if saved
1147
1148                                 if( !$this->mArticle->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1149                                         $wgOut->addWikiMsg( 'rev-deleted-text-permission' );
1150                                 } else if( $this->mArticle->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1151                                         $wgOut->addWikiMsg( 'rev-deleted-text-view' );
1152                                 }
1153
1154                                 if( !$this->mArticle->mRevision->isCurrent() ) {
1155                                         $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
1156                                         $wgOut->addWikiMsg( 'editingold' );
1157                                 }
1158                         }
1159                 }
1160
1161                 if( wfReadOnly() ) {
1162                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
1163                 } elseif( $wgUser->isAnon() && $this->formtype != 'preview' ) {
1164                         $wgOut->wrapWikiMsg( '<div id="mw-anon-edit-warning">$1</div>', 'anoneditwarning' );
1165                 } else {
1166                         if( $this->isCssJsSubpage && $this->formtype != 'preview' ) {
1167                                 # Check the skin exists
1168                                 if( $this->isValidCssJsSubpage ) {
1169                                         $wgOut->addWikiMsg( 'usercssjsyoucanpreview' );
1170                                 } else {
1171                                         $wgOut->addWikiMsg( 'userinvalidcssjstitle', $wgTitle->getSkinFromCssJsSubpage() );
1172                                 }
1173                         }
1174                 }
1175
1176                 if( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1177                         # Show a warning if editing an interface message
1178                         $wgOut->addWikiMsg( 'editinginterface' );
1179                 } elseif( $this->mTitle->isProtected( 'edit' ) ) {
1180                         # Is the title semi-protected?
1181                         if( $this->mTitle->isSemiProtected() ) {
1182                                 $noticeMsg = 'semiprotectedpagewarning';
1183                         } else {
1184                                 # Then it must be protected based on static groups (regular)
1185                                 $noticeMsg = 'protectedpagewarning';
1186                         }
1187                         $wgOut->addHTML( "<div id='mw-edit-$noticeMsg'>\n" );
1188                         $wgOut->addWikiMsg( $noticeMsg );
1189                         $wgOut->addHTML( "</div>\n" );
1190                 }
1191                 if ( $this->mTitle->isCascadeProtected() ) {
1192                         # Is this page under cascading protection from some source pages?
1193                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
1194                         $notice = "$1\n";
1195                         if ( count($cascadeSources) > 0 ) {
1196                                 # Explain, and list the titles responsible
1197                                 foreach( $cascadeSources as $page ) {
1198                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
1199                                 }
1200                         }
1201                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', count($cascadeSources) ) );
1202                 }
1203                 if( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) != array() ){
1204                         $wgOut->addWikiMsg( 'titleprotectedwarning' );
1205                 }
1206
1207                 if ( $this->kblength === false ) {
1208                         $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
1209                 }
1210                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
1211                         $wgOut->addHTML( "<div id='mw-edit-longpageerror'>\n" );
1212                         $wgOut->addWikiMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) );
1213                         $wgOut->addHTML( "</div>\n" );
1214                 } elseif( $this->kblength > 29 ) {
1215                         $wgOut->addHTML( "<div id='mw-edit-longpagewarning'>\n" );
1216                         $wgOut->addWikiMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) );
1217                         $wgOut->addHTML( "</div>\n" );
1218                 }
1219
1220                 #need to parse the preview early so that we know which templates are used,
1221                 #otherwise users with "show preview after edit box" will get a blank list
1222                 if ( $this->formtype == 'preview' ) {
1223                         $previewOutput = $this->getPreviewText();
1224                 }
1225
1226                 $rows = $wgUser->getIntOption( 'rows' );
1227                 $cols = $wgUser->getIntOption( 'cols' );
1228
1229                 $ew = $wgUser->getOption( 'editwidth' );
1230                 if ( $ew ) $ew = " style=\"width:100%\"";
1231                 else $ew = '';
1232
1233                 $q = 'action=submit';
1234                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
1235                 $action = $wgTitle->escapeLocalURL( $q );
1236
1237                 $colonSep = wfMsg( 'colon-separator' );
1238                 $summary = wfMsg( 'summary' ) . $colonSep;
1239                 $subject = wfMsg( 'subject' ) . $colonSep;
1240
1241                 $cancel = $sk->makeKnownLink( $wgTitle->getPrefixedText(),
1242                                 wfMsgExt('cancel', array('parseinline')) );
1243                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ));
1244                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
1245                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
1246                         htmlspecialchars( wfMsg( 'newwindow' ) );
1247
1248                 global $wgRightsText;
1249                 if ( $wgRightsText ) {
1250                         $copywarnMsg = array( 'copyrightwarning',
1251                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
1252                                 $wgRightsText );
1253                 } else {
1254                         $copywarnMsg = array( 'copyrightwarning2',
1255                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
1256                 }
1257
1258                 if( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
1259                         # prepare toolbar for edit buttons
1260                         $toolbar = EditPage::getEditToolbar();
1261                 } else {
1262                         $toolbar = '';
1263                 }
1264
1265                 // activate checkboxes if user wants them to be always active
1266                 if( !$this->preview && !$this->diff ) {
1267                         # Sort out the "watch" checkbox
1268                         if( $wgUser->getOption( 'watchdefault' ) ) {
1269                                 # Watch all edits
1270                                 $this->watchthis = true;
1271                         } elseif( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1272                                 # Watch creations
1273                                 $this->watchthis = true;
1274                         } elseif( $this->mTitle->userIsWatching() ) {
1275                                 # Already watched
1276                                 $this->watchthis = true;
1277                         }
1278
1279                         if( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
1280                 }
1281
1282                 $wgOut->addHTML( $this->editFormPageTop );
1283
1284                 if ( $wgUser->getOption( 'previewontop' ) ) {
1285
1286                         if ( 'preview' == $this->formtype ) {
1287                                 $this->showPreview( $previewOutput );
1288                         } else {
1289                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
1290                         }
1291
1292                         if ( 'diff' == $this->formtype ) {
1293                                 $this->showDiff();
1294                         }
1295                 }
1296
1297
1298                 $wgOut->addHTML( $this->editFormTextTop );
1299
1300                 # if this is a comment, show a subject line at the top, which is also the edit summary.
1301                 # Otherwise, show a summary field at the bottom
1302                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
1303
1304                 # If a blank edit summary was previously provided, and the appropriate
1305                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1306                 # user being bounced back more than once in the event that a summary
1307                 # is not required.
1308                 #####
1309                 # For a bit more sophisticated detection of blank summaries, hash the
1310                 # automatic one and pass that in the hidden field wpAutoSummary.
1311                 $summaryhiddens =  '';
1312                 if( $this->missingSummary ) $summaryhiddens .= Xml::hidden( 'wpIgnoreBlankSummary', true );
1313                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1314                 $summaryhiddens .= Xml::hidden( 'wpAutoSummary', $autosumm );
1315                 if( $this->section == 'new' ) {
1316                         $commentsubject="<span id='wpSummaryLabel'><label for='wpSummary'>{$subject}</label></span>\n<input tabindex='1' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' />{$summaryhiddens}<br />";
1317                         $editsummary = "<div class='editOptions'>\n";
1318                         global $wgParser;
1319                         $formattedSummary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $this->summary ) );
1320                         $subjectpreview = $summarytext && $this->preview ? "<div class=\"mw-summary-preview\">".wfMsg('subject-preview').$colonSep.$sk->commentBlock( $formattedSummary, $this->mTitle, true )."</div>\n" : '';
1321                         $summarypreview = '';
1322                 } else {
1323                         $commentsubject = '';
1324                         $editsummary="<div class='editOptions'>\n<span id='wpSummaryLabel'><label for='wpSummary'>{$summary}</label></span>\n<input tabindex='2' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' />{$summaryhiddens}<br />";
1325                         $summarypreview = $summarytext && $this->preview ? "<div class=\"mw-summary-preview\">".wfMsg('summary-preview').$colonSep.$sk->commentBlock( $this->summary, $this->mTitle )."</div>\n" : '';
1326                         $subjectpreview = '';
1327                 }
1328
1329                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
1330                 if( !$this->preview && !$this->diff ) {
1331                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
1332                 }
1333                 $templates = ($this->preview || $this->section != '') ? $this->mPreviewTemplates : $this->mArticle->getUsedTemplates();
1334                 $formattedtemplates = $sk->formatTemplates( $templates, $this->preview, $this->section != '');
1335
1336                 $hiddencats = $this->mArticle->getHiddenCategories();
1337                 $formattedhiddencats = $sk->formatHiddenCategories( $hiddencats );
1338
1339                 global $wgUseMetadataEdit ;
1340                 if ( $wgUseMetadataEdit ) {
1341                         $metadata = $this->mMetaData ;
1342                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
1343                         $top = wfMsgWikiHtml( 'metadata_help' );
1344                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
1345                 }
1346                 else $metadata = "" ;
1347
1348                 $hidden = '';
1349                 $recreate = '';
1350                 if ($this->wasDeletedSinceLastEdit()) {
1351                         if ( 'save' != $this->formtype ) {
1352                                 $wgOut->addWikiMsg('deletedwhileediting');
1353                         } else {
1354                                 // Hide the toolbar and edit area, use can click preview to get it back
1355                                 // Add an confirmation checkbox and explanation.
1356                                 $toolbar = '';
1357                                 $hidden = 'type="hidden" style="display:none;"';
1358                                 $recreate = $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ));
1359                                 $recreate .=
1360                                         "<br /><input tabindex='1' type='checkbox' value='1' name='wpRecreate' id='wpRecreate' />".
1361                                         "<label for='wpRecreate' title='".wfMsg('tooltip-recreate')."'>". wfMsg('recreate')."</label>";
1362                         }
1363                 }
1364
1365                 $tabindex = 2;
1366
1367                 $checkboxes = self::getCheckboxes( $tabindex, $sk,
1368                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
1369
1370                 $checkboxhtml = implode( $checkboxes, "\n" );
1371
1372                 $buttons = $this->getEditButtons( $tabindex );
1373                 $buttonshtml = implode( $buttons, "\n" );
1374
1375                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
1376                         ? '' : Xml::hidden( 'safemode', '1' );
1377
1378                 $wgOut->addHTML( <<<END
1379 {$toolbar}
1380 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1381 END
1382 );
1383
1384                 if( is_callable( $formCallback ) ) {
1385                         call_user_func_array( $formCallback, array( &$wgOut ) );
1386                 }
1387
1388                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1389
1390                 // Put these up at the top to ensure they aren't lost on early form submission
1391                 $wgOut->addHTML( "
1392 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
1393 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
1394 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
1395 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
1396
1397                 $encodedtext = htmlspecialchars( $this->safeUnicodeOutput( $this->textbox1 ) );
1398                 if( $encodedtext !== '' ) {
1399                         // Ensure there's a newline at the end, otherwise adding lines
1400                         // is awkward.
1401                         // But don't add a newline if the ext is empty, or Firefox in XHTML
1402                         // mode will show an extra newline. A bit annoying.
1403                         $encodedtext .= "\n";
1404                 }
1405
1406                 $wgOut->addHTML( <<<END
1407 $recreate
1408 {$commentsubject}
1409 {$subjectpreview}
1410 {$this->editFormTextBeforeContent}
1411 <textarea tabindex='1' accesskey="," name="wpTextbox1" id="wpTextbox1" rows='{$rows}'
1412 cols='{$cols}'{$ew} $hidden>{$encodedtext}</textarea>
1413 END
1414 );
1415
1416                 $wgOut->wrapWikiMsg( "<div id=\"editpage-copywarn\">\n$1\n</div>", $copywarnMsg );
1417                 $wgOut->addHTML( $this->editFormTextAfterWarn );
1418                 $wgOut->addHTML( "
1419 {$metadata}
1420 {$editsummary}
1421 {$summarypreview}
1422 {$checkboxhtml}
1423 {$safemodehtml}
1424 ");
1425
1426                 $wgOut->addHTML(
1427 "<div class='editButtons'>
1428 {$buttonshtml}
1429         <span class='editHelp'>{$cancel} | {$edithelp}</span>
1430 </div><!-- editButtons -->
1431 </div><!-- editOptions -->");
1432
1433                 /**
1434                  * To make it harder for someone to slip a user a page
1435                  * which submits an edit form to the wiki without their
1436                  * knowledge, a random token is associated with the login
1437                  * session. If it's not passed back with the submission,
1438                  * we won't save the page, or render user JavaScript and
1439                  * CSS previews.
1440                  *
1441                  * For anon editors, who may not have a session, we just
1442                  * include the constant suffix to prevent editing from
1443                  * broken text-mangling proxies.
1444                  */
1445                 $token = htmlspecialchars( $wgUser->editToken() );
1446                 $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
1447
1448                 $wgOut->addHtml( '<div class="mw-editTools">' );
1449                 $wgOut->addWikiMsgArray( 'edittools', array(), array( 'content' ) );
1450                 $wgOut->addHtml( '</div>' );
1451
1452                 $wgOut->addHTML( $this->editFormTextAfterTools );
1453
1454                 $wgOut->addHTML( "
1455 <div class='templatesUsed'>
1456 {$formattedtemplates}
1457 </div>
1458 <div class='hiddencats'>
1459 {$formattedhiddencats}
1460 </div>
1461 ");
1462
1463                 if ( $this->isConflict && wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
1464                         $wgOut->wrapWikiMsg( '==$1==', "yourdiff" );
1465
1466                         $de = new DifferenceEngine( $this->mTitle );
1467                         $de->setText( $this->textbox2, $this->textbox1 );
1468                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1469
1470                         $wgOut->wrapWikiMsg( '==$1==', "yourtext" );
1471                         $wgOut->addHTML( "<textarea tabindex='6' id='wpTextbox2' name=\"wpTextbox2\" rows='{$rows}' cols='{$cols}'>"
1472                                 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox2 ) ) . "\n</textarea>" );
1473                 }
1474                 $wgOut->addHTML( $this->editFormTextBottom );
1475                 $wgOut->addHTML( "</form>\n" );
1476                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1477
1478                         if ( $this->formtype == 'preview') {
1479                                 $this->showPreview( $previewOutput );
1480                         } else {
1481                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
1482                         }
1483
1484                         if ( $this->formtype == 'diff') {
1485                                 $this->showDiff();
1486                         }
1487
1488                 }
1489
1490                 wfProfileOut( $fname );
1491         }
1492
1493         /**
1494          * Append preview output to $wgOut.
1495          * Includes category rendering if this is a category page.
1496          *
1497          * @param string $text The HTML to be output for the preview.
1498          */
1499         protected function showPreview( $text ) {
1500                 global $wgOut;
1501
1502                 $wgOut->addHTML( '<div id="wikiPreview">' );
1503                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1504                         $this->mArticle->openShowCategory();
1505                 }
1506                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
1507                 $wgOut->addHTML( $text );
1508                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1509                         $this->mArticle->closeShowCategory();
1510                 }
1511                 $wgOut->addHTML( '</div>' );
1512         }
1513
1514         /**
1515          * Live Preview lets us fetch rendered preview page content and
1516          * add it to the page without refreshing the whole page.
1517          * If not supported by the browser it will fall through to the normal form
1518          * submission method.
1519          *
1520          * This function outputs a script tag to support live preview, and
1521          * returns an onclick handler which should be added to the attributes
1522          * of the preview button
1523          */
1524         function doLivePreviewScript() {
1525                 global $wgOut, $wgTitle;
1526                 $wgOut->addScriptFile( 'preview.js' );
1527                 $liveAction = $wgTitle->getLocalUrl( 'action=submit&wpPreview=true&live=true' );
1528                 return "return !lpDoPreview(" .
1529                         "editform.wpTextbox1.value," .
1530                         '"' . $liveAction . '"' . ")";
1531         }
1532
1533         function getLastDelete() {
1534                 $dbr = wfGetDB( DB_SLAVE );
1535                 $fname = 'EditPage::getLastDelete';
1536                 $res = $dbr->select(
1537                         array( 'logging', 'user' ),
1538                         array( 'log_type',
1539                                'log_action',
1540                                'log_timestamp',
1541                                'log_user',
1542                                'log_namespace',
1543                                'log_title',
1544                                'log_comment',
1545                                'log_params',
1546                                'user_name', ),
1547                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1548                                'log_title' => $this->mTitle->getDBkey(),
1549                                'log_type' => 'delete',
1550                                'log_action' => 'delete',
1551                                'user_id=log_user' ),
1552                         $fname,
1553                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
1554
1555                 if($dbr->numRows($res) == 1) {
1556                         while ( $x = $dbr->fetchObject ( $res ) )
1557                                 $data = $x;
1558                         $dbr->freeResult ( $res ) ;
1559                 } else {
1560                         $data = null;
1561                 }
1562                 return $data;
1563         }
1564
1565         /**
1566          * Get the rendered text for previewing.
1567          * @return string
1568          */
1569         function getPreviewText() {
1570                 global $wgOut, $wgUser, $wgTitle, $wgParser, $wgLang, $wgContLang;
1571
1572                 $fname = 'EditPage::getPreviewText';
1573                 wfProfileIn( $fname );
1574
1575                 if ( $this->mTriedSave && !$this->mTokenOk ) {
1576                         if ( $this->mTokenOkExceptSuffix ) {
1577                                 $note = wfMsg( 'token_suffix_mismatch' );
1578                         } else {
1579                                 $note = wfMsg( 'session_fail_preview' );
1580                         }
1581                 } else {
1582                         $note = wfMsg( 'previewnote' );
1583                 }
1584
1585                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1586                 $parserOptions->setEditSection( false );
1587
1588                 global $wgRawHtml;
1589                 if( $wgRawHtml && !$this->mTokenOk ) {
1590                         // Could be an offsite preview attempt. This is very unsafe if
1591                         // HTML is enabled, as it could be an attack.
1592                         return $wgOut->parse( "<div class='previewnote'>" .
1593                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1594                 }
1595
1596                 # don't parse user css/js, show message about preview
1597                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1598
1599                 if ( $this->isCssJsSubpage ) {
1600                         if(preg_match("/\\.css$/", $this->mTitle->getText() ) ) {
1601                                 $previewtext = wfMsg('usercsspreview');
1602                         } else if(preg_match("/\\.js$/", $this->mTitle->getText() ) ) {
1603                                 $previewtext = wfMsg('userjspreview');
1604                         }
1605                         $parserOptions->setTidy(true);
1606                         $parserOutput = $wgParser->parse( $previewtext , $this->mTitle, $parserOptions );
1607                         $wgOut->addHTML( $parserOutput->mText );
1608                         $previewHTML = '';
1609                 } else if( $rt = Title::newFromRedirect( $this->textbox1 ) ) {
1610                         $previewHTML = $this->mArticle->viewRedirect( $rt, false );
1611                 } else {
1612                         $toparse = $this->textbox1;
1613
1614                         # If we're adding a comment, we need to show the
1615                         # summary as the headline
1616                         if($this->section=="new" && $this->summary!="") {
1617                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1618                         }
1619
1620                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData;
1621
1622                         // Parse mediawiki messages with correct target language
1623                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1624                                 $pos = strrpos( $this->mTitle->getText(), '/' );
1625                                 if ( $pos !== false ) {
1626                                         $code = substr( $this->mTitle->getText(), $pos+1 );
1627                                         switch ($code) {
1628                                                 case $wgLang->getCode():
1629                                                         $obj = $wgLang; break;
1630                                                 case $wgContLang->getCode():
1631                                                         $obj = $wgContLang; break;
1632                                                 default:
1633                                                         $obj = Language::factory( $code );
1634                                         }
1635                                         $parserOptions->setTargetLanguage( $obj );
1636                                 }
1637                         }
1638
1639
1640                         $parserOptions->setTidy(true);
1641                         $parserOptions->enableLimitReport();
1642                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ),
1643                                         $this->mTitle, $parserOptions );
1644
1645                         $previewHTML = $parserOutput->getText();
1646                         $wgOut->addParserOutputNoText( $parserOutput );
1647
1648                         # ParserOutput might have altered the page title, so reset it
1649                         # Also, use the title defined by DISPLAYTITLE magic word when present
1650                         if( ( $dt = $parserOutput->getDisplayTitle() ) !== false ) {
1651                                 $wgOut->setPageTitle( wfMsg( 'editing', $dt ) );
1652                         } else {
1653                                 $wgOut->setPageTitle( wfMsg( 'editing', $wgTitle->getPrefixedText() ) );
1654                         }
1655
1656                         foreach ( $parserOutput->getTemplates() as $ns => $template)
1657                                 foreach ( array_keys( $template ) as $dbk)
1658                                         $this->mPreviewTemplates[] = Title::makeTitle($ns, $dbk);
1659
1660                         if ( count( $parserOutput->getWarnings() ) ) {
1661                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
1662                         }
1663                 }
1664
1665                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
1666                         "<div class='previewnote'>" . $wgOut->parse( $note ) . "</div>\n";
1667                 if ( $this->isConflict ) {
1668                         $previewhead.='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1669                 }
1670
1671                 if( $wgUser->getOption( 'previewontop' ) ) {
1672                         // Spacer for the edit toolbar
1673                         $previewfoot = '<p><br /></p>';
1674                 } else {
1675                         $previewfoot = '';
1676                 }
1677
1678                 wfProfileOut( $fname );
1679                 return $previewhead . $previewHTML . $previewfoot;
1680         }
1681
1682         /**
1683          * Call the stock "user is blocked" page
1684          */
1685         function blockedPage() {
1686                 global $wgOut, $wgUser;
1687                 $wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
1688
1689                 # If the user made changes, preserve them when showing the markup
1690                 # (This happens when a user is blocked during edit, for instance)
1691                 $first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
1692                 if( $first ) {
1693                         $source = $this->mTitle->exists() ? $this->getContent() : false;
1694                 } else {
1695                         $source = $this->textbox1;
1696                 }
1697
1698                 # Spit out the source or the user's modified version
1699                 if( $source !== false ) {
1700                         $rows = $wgUser->getOption( 'rows' );
1701                         $cols = $wgUser->getOption( 'cols' );
1702                         $attribs = array( 'id' => 'wpTextbox1', 'name' => 'wpTextbox1', 'cols' => $cols, 'rows' => $rows, 'readonly' => 'readonly' );
1703                         $wgOut->addHtml( '<hr />' );
1704                         $wgOut->addWikiMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() );
1705                         # Why we don't use Xml::element here?
1706                         # Is it because if $source is '', it returns <textarea />?
1707                         $wgOut->addHtml( Xml::openElement( 'textarea', $attribs ) . htmlspecialchars( $source ) . Xml::closeElement( 'textarea' ) );
1708                 }
1709         }
1710
1711         /**
1712          * Produce the stock "please login to edit pages" page
1713          */
1714         function userNotLoggedInPage() {
1715                 global $wgUser, $wgOut, $wgTitle;
1716                 $skin = $wgUser->getSkin();
1717
1718                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1719                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $wgTitle->getPrefixedUrl() );
1720
1721                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1722                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1723                 $wgOut->setArticleRelated( false );
1724
1725                 $wgOut->addHtml( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
1726                 $wgOut->returnToMain( false, $wgTitle );
1727         }
1728
1729         /**
1730          * Creates a basic error page which informs the user that
1731          * they have attempted to edit a nonexistant section.
1732          */
1733         function noSuchSectionPage() {
1734                 global $wgOut, $wgTitle;
1735
1736                 $wgOut->setPageTitle( wfMsg( 'nosuchsectiontitle' ) );
1737                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1738                 $wgOut->setArticleRelated( false );
1739
1740                 $wgOut->addWikiMsg( 'nosuchsectiontext', $this->section );
1741                 $wgOut->returnToMain( false, $wgTitle );
1742         }
1743
1744         /**
1745          * Produce the stock "your edit contains spam" page
1746          *
1747          * @param $match Text which triggered one or more filters
1748          */
1749         function spamPage( $match = false ) {
1750                 global $wgOut, $wgTitle;
1751
1752                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1753                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1754                 $wgOut->setArticleRelated( false );
1755
1756                 $wgOut->addHtml( '<div id="spamprotected">' );
1757                 $wgOut->addWikiMsg( 'spamprotectiontext' );
1758                 if ( $match )
1759                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
1760                 $wgOut->addHtml( '</div>' );
1761
1762                 $wgOut->returnToMain( false, $wgTitle );
1763         }
1764
1765         /**
1766          * @private
1767          * @todo document
1768          */
1769         function mergeChangesInto( &$editText ){
1770                 $fname = 'EditPage::mergeChangesInto';
1771                 wfProfileIn( $fname );
1772
1773                 $db = wfGetDB( DB_MASTER );
1774
1775                 // This is the revision the editor started from
1776                 $baseRevision = $this->getBaseRevision();
1777                 if( is_null( $baseRevision ) ) {
1778                         wfProfileOut( $fname );
1779                         return false;
1780                 }
1781                 $baseText = $baseRevision->getText();
1782
1783                 // The current state, we want to merge updates into it
1784                 $currentRevision =  Revision::loadFromTitle(
1785                         $db, $this->mTitle );
1786                 if( is_null( $currentRevision ) ) {
1787                         wfProfileOut( $fname );
1788                         return false;
1789                 }
1790                 $currentText = $currentRevision->getText();
1791
1792                 $result = '';
1793                 if( wfMerge( $baseText, $editText, $currentText, $result ) ){
1794                         $editText = $result;
1795                         wfProfileOut( $fname );
1796                         return true;
1797                 } else {
1798                         wfProfileOut( $fname );
1799                         return false;
1800                 }
1801         }
1802
1803         /**
1804          * Check if the browser is on a blacklist of user-agents known to
1805          * mangle UTF-8 data on form submission. Returns true if Unicode
1806          * should make it through, false if it's known to be a problem.
1807          * @return bool
1808          * @private
1809          */
1810         function checkUnicodeCompliantBrowser() {
1811                 global $wgBrowserBlackList;
1812                 if( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
1813                         // No User-Agent header sent? Trust it by default...
1814                         return true;
1815                 }
1816                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1817                 foreach ( $wgBrowserBlackList as $browser ) {
1818                         if ( preg_match($browser, $currentbrowser) ) {
1819                                 return false;
1820                         }
1821                 }
1822                 return true;
1823         }
1824
1825         /**
1826          * @deprecated use $wgParser->stripSectionName()
1827          */
1828         function pseudoParseSectionAnchor( $text ) {
1829                 global $wgParser;
1830                 return $wgParser->stripSectionName( $text );
1831         }
1832
1833         /**
1834          * Format an anchor fragment as it would appear for a given section name
1835          * @param string $text
1836          * @return string
1837          * @private
1838          */
1839         function sectionAnchor( $text ) {
1840                 global $wgParser;
1841                 return $wgParser->guessSectionNameFromWikiText( $text );
1842         }
1843
1844         /**
1845          * Shows a bulletin board style toolbar for common editing functions.
1846          * It can be disabled in the user preferences.
1847          * The necessary JavaScript code can be found in skins/common/edit.js.
1848          *
1849          * @return string
1850          */
1851         static function getEditToolbar() {
1852                 global $wgStylePath, $wgContLang, $wgLang, $wgJsMimeType;
1853
1854                 /**
1855                  * toolarray an array of arrays which each include the filename of
1856                  * the button image (without path), the opening tag, the closing tag,
1857                  * and optionally a sample text that is inserted between the two when no
1858                  * selection is highlighted.
1859                  * The tip text is shown when the user moves the mouse over the button.
1860                  *
1861                  * Already here are accesskeys (key), which are not used yet until someone
1862                  * can figure out a way to make them work in IE. However, we should make
1863                  * sure these keys are not defined on the edit page.
1864                  */
1865                 $toolarray = array(
1866                         array(
1867                                 'image'  => $wgLang->getImageFile('button-bold'),
1868                                 'id'     => 'mw-editbutton-bold',
1869                                 'open'   => '\'\'\'',
1870                                 'close'  => '\'\'\'',
1871                                 'sample' => wfMsg('bold_sample'),
1872                                 'tip'    => wfMsg('bold_tip'),
1873                                 'key'    => 'B'
1874                         ),
1875                         array(
1876                                 'image'  => $wgLang->getImageFile('button-italic'),
1877                                 'id'     => 'mw-editbutton-italic',
1878                                 'open'   => '\'\'',
1879                                 'close'  => '\'\'',
1880                                 'sample' => wfMsg('italic_sample'),
1881                                 'tip'    => wfMsg('italic_tip'),
1882                                 'key'    => 'I'
1883                         ),
1884                         array(
1885                                 'image'  => $wgLang->getImageFile('button-link'),
1886                                 'id'     => 'mw-editbutton-link',
1887                                 'open'   => '[[',
1888                                 'close'  => ']]',
1889                                 'sample' => wfMsg('link_sample'),
1890                                 'tip'    => wfMsg('link_tip'),
1891                                 'key'    => 'L'
1892                         ),
1893                         array(
1894                                 'image'  => $wgLang->getImageFile('button-extlink'),
1895                                 'id'     => 'mw-editbutton-extlink',
1896                                 'open'   => '[',
1897                                 'close'  => ']',
1898                                 'sample' => wfMsg('extlink_sample'),
1899                                 'tip'    => wfMsg('extlink_tip'),
1900                                 'key'    => 'X'
1901                         ),
1902                         array(
1903                                 'image'  => $wgLang->getImageFile('button-headline'),
1904                                 'id'     => 'mw-editbutton-headline',
1905                                 'open'   => "\n== ",
1906                                 'close'  => " ==\n",
1907                                 'sample' => wfMsg('headline_sample'),
1908                                 'tip'    => wfMsg('headline_tip'),
1909                                 'key'    => 'H'
1910                         ),
1911                         array(
1912                                 'image'  => $wgLang->getImageFile('button-image'),
1913                                 'id'     => 'mw-editbutton-image',
1914                                 'open'   => '[['.$wgContLang->getNsText(NS_IMAGE).':',
1915                                 'close'  => ']]',
1916                                 'sample' => wfMsg('image_sample'),
1917                                 'tip'    => wfMsg('image_tip'),
1918                                 'key'    => 'D'
1919                         ),
1920                         array(
1921                                 'image'  => $wgLang->getImageFile('button-media'),
1922                                 'id'     => 'mw-editbutton-media',
1923                                 'open'   => '[['.$wgContLang->getNsText(NS_MEDIA).':',
1924                                 'close'  => ']]',
1925                                 'sample' => wfMsg('media_sample'),
1926                                 'tip'    => wfMsg('media_tip'),
1927                                 'key'    => 'M'
1928                         ),
1929                         array(
1930                                 'image'  => $wgLang->getImageFile('button-math'),
1931                                 'id'     => 'mw-editbutton-math',
1932                                 'open'   => "<math>",
1933                                 'close'  => "</math>",
1934                                 'sample' => wfMsg('math_sample'),
1935                                 'tip'    => wfMsg('math_tip'),
1936                                 'key'    => 'C'
1937                         ),
1938                         array(
1939                                 'image'  => $wgLang->getImageFile('button-nowiki'),
1940                                 'id'     => 'mw-editbutton-nowiki',
1941                                 'open'   => "<nowiki>",
1942                                 'close'  => "</nowiki>",
1943                                 'sample' => wfMsg('nowiki_sample'),
1944                                 'tip'    => wfMsg('nowiki_tip'),
1945                                 'key'    => 'N'
1946                         ),
1947                         array(
1948                                 'image'  => $wgLang->getImageFile('button-sig'),
1949                                 'id'     => 'mw-editbutton-signature',
1950                                 'open'   => '--~~~~',
1951                                 'close'  => '',
1952                                 'sample' => '',
1953                                 'tip'    => wfMsg('sig_tip'),
1954                                 'key'    => 'Y'
1955                         ),
1956                         array(
1957                                 'image'  => $wgLang->getImageFile('button-hr'),
1958                                 'id'     => 'mw-editbutton-hr',
1959                                 'open'   => "\n----\n",
1960                                 'close'  => '',
1961                                 'sample' => '',
1962                                 'tip'    => wfMsg('hr_tip'),
1963                                 'key'    => 'R'
1964                         )
1965                 );
1966                 $toolbar = "<div id='toolbar'>\n";
1967                 $toolbar.="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
1968
1969                 foreach($toolarray as $tool) {
1970                         $params = array(
1971                                 $image = $wgStylePath.'/common/images/'.$tool['image'],
1972                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
1973                                 // Older browsers show a "speedtip" type message only for ALT.
1974                                 // Ideally these should be different, realistically they
1975                                 // probably don't need to be.
1976                                 $tip = $tool['tip'],
1977                                 $open = $tool['open'],
1978                                 $close = $tool['close'],
1979                                 $sample = $tool['sample'],
1980                                 $cssId = $tool['id'],
1981                         );
1982
1983                         $paramList = implode( ',',
1984                                 array_map( array( 'Xml', 'encodeJsVar' ), $params ) );
1985                         $toolbar.="addButton($paramList);\n";
1986                 }
1987
1988                 $toolbar.="/*]]>*/\n</script>";
1989                 $toolbar.="\n</div>";
1990                 return $toolbar;
1991         }
1992
1993         /**
1994          * Returns an array of html code of the following checkboxes:
1995          * minor and watch
1996          *
1997          * @param $tabindex Current tabindex
1998          * @param $skin Skin object
1999          * @param $checked Array of checkbox => bool, where bool indicates the checked
2000          *                 status of the checkbox
2001          *
2002          * @return array
2003          */
2004         public static function getCheckboxes( &$tabindex, $skin, $checked ) {
2005                 global $wgUser;
2006
2007                 $checkboxes = array();
2008
2009                 $checkboxes['minor'] = '';
2010                 $minorLabel = wfMsgExt('minoredit', array('parseinline'));
2011                 if ( $wgUser->isAllowed('minoredit') ) {
2012                         $attribs = array(
2013                                 'tabindex'  => ++$tabindex,
2014                                 'accesskey' => wfMsg( 'accesskey-minoredit' ),
2015                                 'id'        => 'wpMinoredit',
2016                         );
2017                         $checkboxes['minor'] =
2018                                 Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
2019                                 "&nbsp;<label for='wpMinoredit'".$skin->tooltip('minoredit', 'withaccess').">{$minorLabel}</label>";
2020                 }
2021
2022                 $watchLabel = wfMsgExt('watchthis', array('parseinline'));
2023                 $checkboxes['watch'] = '';
2024                 if ( $wgUser->isLoggedIn() ) {
2025                         $attribs = array(
2026                                 'tabindex'  => ++$tabindex,
2027                                 'accesskey' => wfMsg( 'accesskey-watch' ),
2028                                 'id'        => 'wpWatchthis',
2029                         );
2030                         $checkboxes['watch'] =
2031                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
2032                                 "&nbsp;<label for='wpWatchthis'".$skin->tooltip('watch', 'withaccess').">{$watchLabel}</label>";
2033                 }
2034                 return $checkboxes;
2035         }
2036
2037         /**
2038          * Returns an array of html code of the following buttons:
2039          * save, diff, preview and live
2040          *
2041          * @param $tabindex Current tabindex
2042          *
2043          * @return array
2044          */
2045         public function getEditButtons(&$tabindex) {
2046                 global $wgLivePreview, $wgUser;
2047
2048                 $buttons = array();
2049
2050                 $temp = array(
2051                         'id'        => 'wpSave',
2052                         'name'      => 'wpSave',
2053                         'type'      => 'submit',
2054                         'tabindex'  => ++$tabindex,
2055                         'value'     => wfMsg('savearticle'),
2056                         'accesskey' => wfMsg('accesskey-save'),
2057                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
2058                 );
2059                 $buttons['save'] = Xml::element('input', $temp, '');
2060
2061                 ++$tabindex; // use the same for preview and live preview
2062                 if ( $wgLivePreview && $wgUser->getOption( 'uselivepreview' ) ) {
2063                         $temp = array(
2064                                 'id'        => 'wpPreview',
2065                                 'name'      => 'wpPreview',
2066                                 'type'      => 'submit',
2067                                 'tabindex'  => $tabindex,
2068                                 'value'     => wfMsg('showpreview'),
2069                                 'accesskey' => '',
2070                                 'title'     => wfMsg( 'tooltip-preview' ).' ['.wfMsg( 'accesskey-preview' ).']',
2071                                 'style'     => 'display: none;',
2072                         );
2073                         $buttons['preview'] = Xml::element('input', $temp, '');
2074
2075                         $temp = array(
2076                                 'id'        => 'wpLivePreview',
2077                                 'name'      => 'wpLivePreview',
2078                                 'type'      => 'submit',
2079                                 'tabindex'  => $tabindex,
2080                                 'value'     => wfMsg('showlivepreview'),
2081                                 'accesskey' => wfMsg('accesskey-preview'),
2082                                 'title'     => '',
2083                                 'onclick'   => $this->doLivePreviewScript(),
2084                         );
2085                         $buttons['live'] = Xml::element('input', $temp, '');
2086                 } else {
2087                         $temp = array(
2088                                 'id'        => 'wpPreview',
2089                                 'name'      => 'wpPreview',
2090                                 'type'      => 'submit',
2091                                 'tabindex'  => $tabindex,
2092                                 'value'     => wfMsg('showpreview'),
2093                                 'accesskey' => wfMsg('accesskey-preview'),
2094                                 'title'     => wfMsg( 'tooltip-preview' ).' ['.wfMsg( 'accesskey-preview' ).']',
2095                         );
2096                         $buttons['preview'] = Xml::element('input', $temp, '');
2097                         $buttons['live'] = '';
2098                 }
2099
2100                 $temp = array(
2101                         'id'        => 'wpDiff',
2102                         'name'      => 'wpDiff',
2103                         'type'      => 'submit',
2104                         'tabindex'  => ++$tabindex,
2105                         'value'     => wfMsg('showdiff'),
2106                         'accesskey' => wfMsg('accesskey-diff'),
2107                         'title'     => wfMsg( 'tooltip-diff' ).' ['.wfMsg( 'accesskey-diff' ).']',
2108                 );
2109                 $buttons['diff'] = Xml::element('input', $temp, '');
2110
2111                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons ) );
2112                 return $buttons;
2113         }
2114
2115         /**
2116          * Output preview text only. This can be sucked into the edit page
2117          * via JavaScript, and saves the server time rendering the skin as
2118          * well as theoretically being more robust on the client (doesn't
2119          * disturb the edit box's undo history, won't eat your text on
2120          * failure, etc).
2121          *
2122          * @todo This doesn't include category or interlanguage links.
2123          *       Would need to enhance it a bit, <s>maybe wrap them in XML
2124          *       or something...</s> that might also require more skin
2125          *       initialization, so check whether that's a problem.
2126          */
2127         function livePreview() {
2128                 global $wgOut;
2129                 $wgOut->disable();
2130                 header( 'Content-type: text/xml; charset=utf-8' );
2131                 header( 'Cache-control: no-cache' );
2132
2133                 $previewText = $this->getPreviewText();
2134                 #$categories = $skin->getCategoryLinks();
2135
2136                 $s =
2137                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
2138                 Xml::tags( 'livepreview', null,
2139                         Xml::element( 'preview', null, $previewText )
2140                         #.      Xml::element( 'category', null, $categories )
2141                 );
2142                 echo $s;
2143         }
2144
2145
2146         /**
2147          * Get a diff between the current contents of the edit box and the
2148          * version of the page we're editing from.
2149          *
2150          * If this is a section edit, we'll replace the section as for final
2151          * save and then make a comparison.
2152          */
2153         function showDiff() {
2154                 $oldtext = $this->mArticle->fetchContent();
2155                 $newtext = $this->mArticle->replaceSection(
2156                         $this->section, $this->textbox1, $this->summary, $this->edittime );
2157                 $newtext = $this->mArticle->preSaveTransform( $newtext );
2158                 $oldtitle = wfMsgExt( 'currentrev', array('parseinline') );
2159                 $newtitle = wfMsgExt( 'yourtext', array('parseinline') );
2160                 if ( $oldtext !== false  || $newtext != '' ) {
2161                         $de = new DifferenceEngine( $this->mTitle );
2162                         $de->setText( $oldtext, $newtext );
2163                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2164                         $de->showDiffStyle();
2165                 } else {
2166                         $difftext = '';
2167                 }
2168
2169                 global $wgOut;
2170                 $wgOut->addHtml( '<div id="wikiDiff">' . $difftext . '</div>' );
2171         }
2172
2173         /**
2174          * Filter an input field through a Unicode de-armoring process if it
2175          * came from an old browser with known broken Unicode editing issues.
2176          *
2177          * @param WebRequest $request
2178          * @param string $field
2179          * @return string
2180          * @private
2181          */
2182         function safeUnicodeInput( $request, $field ) {
2183                 $text = rtrim( $request->getText( $field ) );
2184                 return $request->getBool( 'safemode' )
2185                         ? $this->unmakesafe( $text )
2186                         : $text;
2187         }
2188
2189         /**
2190          * Filter an output field through a Unicode armoring process if it is
2191          * going to an old browser with known broken Unicode editing issues.
2192          *
2193          * @param string $text
2194          * @return string
2195          * @private
2196          */
2197         function safeUnicodeOutput( $text ) {
2198                 global $wgContLang;
2199                 $codedText = $wgContLang->recodeForEdit( $text );
2200                 return $this->checkUnicodeCompliantBrowser()
2201                         ? $codedText
2202                         : $this->makesafe( $codedText );
2203         }
2204
2205         /**
2206          * A number of web browsers are known to corrupt non-ASCII characters
2207          * in a UTF-8 text editing environment. To protect against this,
2208          * detected browsers will be served an armored version of the text,
2209          * with non-ASCII chars converted to numeric HTML character references.
2210          *
2211          * Preexisting such character references will have a 0 added to them
2212          * to ensure that round-trips do not alter the original data.
2213          *
2214          * @param string $invalue
2215          * @return string
2216          * @private
2217          */
2218         function makesafe( $invalue ) {
2219                 // Armor existing references for reversability.
2220                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
2221
2222                 $bytesleft = 0;
2223                 $result = "";
2224                 $working = 0;
2225                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2226                         $bytevalue = ord( $invalue{$i} );
2227                         if( $bytevalue <= 0x7F ) { //0xxx xxxx
2228                                 $result .= chr( $bytevalue );
2229                                 $bytesleft = 0;
2230                         } elseif( $bytevalue <= 0xBF ) { //10xx xxxx
2231                                 $working = $working << 6;
2232                                 $working += ($bytevalue & 0x3F);
2233                                 $bytesleft--;
2234                                 if( $bytesleft <= 0 ) {
2235                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
2236                                 }
2237                         } elseif( $bytevalue <= 0xDF ) { //110x xxxx
2238                                 $working = $bytevalue & 0x1F;
2239                                 $bytesleft = 1;
2240                         } elseif( $bytevalue <= 0xEF ) { //1110 xxxx
2241                                 $working = $bytevalue & 0x0F;
2242                                 $bytesleft = 2;
2243                         } else { //1111 0xxx
2244                                 $working = $bytevalue & 0x07;
2245                                 $bytesleft = 3;
2246                         }
2247                 }
2248                 return $result;
2249         }
2250
2251         /**
2252          * Reverse the previously applied transliteration of non-ASCII characters
2253          * back to UTF-8. Used to protect data from corruption by broken web browsers
2254          * as listed in $wgBrowserBlackList.
2255          *
2256          * @param string $invalue
2257          * @return string
2258          * @private
2259          */
2260         function unmakesafe( $invalue ) {
2261                 $result = "";
2262                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2263                         if( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
2264                                 $i += 3;
2265                                 $hexstring = "";
2266                                 do {
2267                                         $hexstring .= $invalue{$i};
2268                                         $i++;
2269                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
2270
2271                                 // Do some sanity checks. These aren't needed for reversability,
2272                                 // but should help keep the breakage down if the editor
2273                                 // breaks one of the entities whilst editing.
2274                                 if ((substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6)) {
2275                                         $codepoint = hexdec($hexstring);
2276                                         $result .= codepointToUtf8( $codepoint );
2277                                 } else {
2278                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
2279                                 }
2280                         } else {
2281                                 $result .= substr( $invalue, $i, 1 );
2282                         }
2283                 }
2284                 // reverse the transform that we made for reversability reasons.
2285                 return strtr( $result, array( "&#x0" => "&#x" ) );
2286         }
2287
2288         function noCreatePermission() {
2289                 global $wgOut;
2290                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
2291                 $wgOut->addWikiMsg( 'nocreatetext' );
2292         }
2293
2294         /**
2295          * If there are rows in the deletion log for this page, show them,
2296          * along with a nice little note for the user
2297          *
2298          * @param OutputPage $out
2299          */
2300         protected function showDeletionLog( $out ) {
2301                 global $wgUser;
2302                 $loglist = new LogEventsList( $wgUser->getSkin(), $out );
2303                 $pager = new LogPager( $loglist, 'delete', false, $this->mTitle->getPrefixedText() );
2304                 if( $pager->getNumRows() > 0 ) {
2305                         $out->addHtml( '<div id="mw-recreate-deleted-warn">' );
2306                         $out->addWikiMsg( 'recreate-deleted-warn' );
2307                         $out->addHTML(
2308                                 $loglist->beginLogEventsList() .
2309                                 $pager->getBody() .
2310                                 $loglist->endLogEventsList()
2311                         );
2312                         $out->addHtml( '</div>' );
2313                 }
2314         }
2315
2316         /**
2317          * Attempt submission
2318          * @return bool false if output is done, true if the rest of the form should be displayed
2319          */
2320         function attemptSave() {
2321                 global $wgUser, $wgOut, $wgTitle, $wgRequest;
2322
2323                 $resultDetails = false;
2324                 $value = $this->internalAttemptSave( $resultDetails, $wgUser->isAllowed('bot') && $wgRequest->getBool('bot', true) );
2325
2326                 if( $value == self::AS_SUCCESS_UPDATE || $value == self::AS_SUCCESS_NEW_ARTICLE ) {
2327                         $this->didSave = true;
2328                 }
2329
2330                 switch ($value) {
2331                         case self::AS_HOOK_ERROR_EXPECTED:
2332                         case self::AS_CONTENT_TOO_BIG:
2333                         case self::AS_ARTICLE_WAS_DELETED:
2334                         case self::AS_CONFLICT_DETECTED:
2335                         case self::AS_SUMMARY_NEEDED:
2336                         case self::AS_TEXTBOX_EMPTY:
2337                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
2338                         case self::AS_END:
2339                                 return true;
2340
2341                         case self::AS_HOOK_ERROR:
2342                         case self::AS_FILTERING:
2343                         case self::AS_SUCCESS_NEW_ARTICLE:
2344                         case self::AS_SUCCESS_UPDATE:
2345                                 return false;
2346
2347                         case self::AS_SPAM_ERROR:
2348                                 $this->spamPage ( $resultDetails['spam'] );
2349                                 return false;
2350
2351                         case self::AS_BLOCKED_PAGE_FOR_USER:
2352                                 $this->blockedPage();
2353                                 return false;
2354
2355                         case self::AS_IMAGE_REDIRECT_ANON:
2356                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
2357                                 return false;
2358
2359                         case self::AS_READ_ONLY_PAGE_ANON:
2360                                 $this->userNotLoggedInPage();
2361                                 return false;
2362
2363                         case self::AS_READ_ONLY_PAGE_LOGGED:
2364                         case self::AS_READ_ONLY_PAGE:
2365                                 $wgOut->readOnlyPage();
2366                                 return false;
2367
2368                         case self::AS_RATE_LIMITED:
2369                                 $wgOut->rateLimited();
2370                                 return false;
2371
2372                         case self::AS_NO_CREATE_PERMISSION;
2373                                 $this->noCreatePermission();
2374                                 return;
2375
2376                         case self::AS_BLANK_ARTICLE:
2377                                 $wgOut->redirect( $wgTitle->getFullURL() );
2378                                 return false;
2379
2380                         case self::AS_IMAGE_REDIRECT_LOGGED:
2381                                 $wgOut->permissionRequired( 'upload' );
2382                                 return false;
2383                 }
2384         }
2385
2386         function getBaseRevision() {
2387                 if ($this->mBaseRevision == false) {
2388                         $db = wfGetDB( DB_MASTER );
2389                         $baseRevision = Revision::loadFromTimestamp(
2390                                 $db, $this->mTitle, $this->edittime );
2391                         return $this->mBaseRevision = $baseRevision;
2392                 } else {
2393                         return $this->mBaseRevision;
2394                 }
2395         }
2396 }