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