includes/EditPage.php

   1 <?php
   2 /**
   3  * Contains the EditPage class
   4  */
   5
   6 /**
   7  * The edit page/HTML interface (split from Article)
   8  * The actual database and text munging is still in Article,
   9  * but it should get easier to call those from alternate
  10  * interfaces.
  11  *
  12  * EditPage cares about two distinct titles:
  13  * $wgTitle is the page that forms submit to, links point to,
  14  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  15  * page in the database that is actually being edited. These are
  16  * usually the same, but they are now allowed to be different.
  17  */
  18 class EditPage {
  19         const AS_SUCCESS_UPDATE                         = 200;
  20         const AS_SUCCESS_NEW_ARTICLE            = 201;
  21         const AS_HOOK_ERROR                                     = 210;
  22         const AS_FILTERING                                      = 211;
  23         const AS_HOOK_ERROR_EXPECTED            = 212;
  24         const AS_BLOCKED_PAGE_FOR_USER          = 215;
  25         const AS_CONTENT_TOO_BIG                        = 216;
  26         const AS_USER_CANNOT_EDIT                       = 217;
  27         const AS_READ_ONLY_PAGE_ANON            = 218;
  28         const AS_READ_ONLY_PAGE_LOGGED          = 219;
  29         const AS_READ_ONLY_PAGE                         = 220;
  30         const AS_RATE_LIMITED                           = 221;
  31         const AS_ARTICLE_WAS_DELETED            = 222;
  32         const AS_NO_CREATE_PERMISSION           = 223;
  33         const AS_BLANK_ARTICLE                          = 224;
  34         const AS_CONFLICT_DETECTED                      = 225;
  35         const AS_SUMMARY_NEEDED                         = 226;
  36         const AS_TEXTBOX_EMPTY                          = 228;
  37         const AS_MAX_ARTICLE_SIZE_EXCEDED       = 229;
  38         const AS_OK                                                     = 230;
  39         const AS_END                                            = 231;
  40         const AS_SPAM_ERROR                                     = 232;
  41
  42         var $mArticle;
  43         var $mTitle;
  44         var $mMetaData = '';
  45         var $isConflict = false;
  46         var $isCssJsSubpage = false;
  47         var $deletedSinceEdit = false;
  48         var $formtype;
  49         var $firsttime;
  50         var $lastDelete;
  51         var $mTokenOk = false;
  52         var $mTokenOkExceptSuffix = false;
  53         var $mTriedSave = false;
  54         var $tooBig = false;
  55         var $kblength = false;
  56         var $missingComment = false;
  57         var $missingSummary = false;
  58         var $allowBlankSummary = false;
  59         var $autoSumm = '';
  60         var $hookError = '';
  61         var $mPreviewTemplates;
  62
  63         # Form values
  64         var $save = false, $preview = false, $diff = false;
  65         var $minoredit = false, $watchthis = false, $recreate = false;
  66         var $textbox1 = '', $textbox2 = '', $summary = '';
  67         var $edittime = '', $section = '', $starttime = '';
  68         var $oldid = 0, $editintro = '', $scrolltop = null;
  69
  70         # Placeholders for text injection by hooks (must be HTML)
  71         # extensions should take care to _append_ to the present value
  72         public $editFormPageTop; // Before even the preview
  73         public $editFormTextTop;
  74         public $editFormTextBeforeContent;
  75         public $editFormTextAfterWarn;
  76         public $editFormTextAfterTools;
  77         public $editFormTextBottom;
  78
  79         /* $didSave should be set to true whenever an article was succesfully altered. */
  80         public $didSave = false;
  81
  82         public $suppressIntro = false;
  83
  84         /**
  85          * @todo document
  86          * @param $article
  87          */
  88         function EditPage( $article ) {
  89                 global $wgTitle;
  90                 $this->mArticle =& $article;
  91                 $this->mTitle = $article->getTitle();
  92
  93                 # Placeholders for text injection by hooks (empty per default)
  94                 $this->editFormPageTop =
  95                 $this->editFormTextTop =
  96                 $this->editFormTextBeforeContent =
  97                 $this->editFormTextAfterWarn =
  98                 $this->editFormTextAfterTools =
  99                 $this->editFormTextBottom = "";
 100         }
 101
 102         /**
 103          * Fetch initial editing page content.
 104          */
 105         private function getContent( $def_text = '' ) {
 106                 global $wgOut, $wgRequest, $wgParser;
 107
 108                 # Get variables from query string :P
 109                 $section = $wgRequest->getVal( 'section' );
 110                 $preload = $wgRequest->getVal( 'preload' );
 111                 $undoafter = $wgRequest->getVal( 'undoafter' );
 112                 $undo = $wgRequest->getVal( 'undo' );
 113
 114                 wfProfileIn( __METHOD__ );
 115
 116                 $text = '';
 117                 if( !$this->mTitle->exists() ) {
 118                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 119                                 # If this is a system message, get the default text.
 120                                 $text = wfMsgWeirdKey ( $this->mTitle->getText() ) ;
 121                         } else {
 122                                 # If requested, preload some text.
 123                                 $text = $this->getPreloadedText( $preload );
 124                         }
 125                         # We used to put MediaWiki:Newarticletext here if
 126                         # $text was empty at this point.
 127                         # This is now shown above the edit box instead.
 128                 } else {
 129                         // FIXME: may be better to use Revision class directly
 130                         // But don't mess with it just yet. Article knows how to
 131                         // fetch the page record from the high-priority server,
 132                         // which is needed to guarantee we don't pick up lagged
 133                         // information.
 134
 135                         $text = $this->mArticle->getContent();
 136
 137                         if ($undo > 0 && $undoafter > 0 && $undo < $undoafter) {
 138                                 # If they got undoafter and undo round the wrong way, switch them
 139                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 140                         }
 141
 142                         if ( $undo > 0 && $undo > $undoafter ) {
 143                                 # Undoing a specific edit overrides section editing; section-editing
 144                                 # doesn't work with undoing.
 145                                 if ( $undoafter ) {
 146                                         $undorev = Revision::newFromId($undo);
 147                                         $oldrev = Revision::newFromId($undoafter);
 148                                 } else {
 149                                         $undorev = Revision::newFromId($undo);
 150                                         $oldrev = $undorev ? $undorev->getPrevious() : null;
 151                                 }
 152
 153                                 #Sanity check, make sure it's the right page.
 154                                 # Otherwise, $text will be left as-is.
 155                                 if ( !is_null($undorev) && !is_null($oldrev) && $undorev->getPage()==$oldrev->getPage() && $undorev->getPage()==$this->mArticle->getID() ) {
 156                                         $undorev_text = $undorev->getText();
 157                                         $oldrev_text = $oldrev->getText();
 158                                         $currev_text = $text;
 159
 160                                         #No use doing a merge if it's just a straight revert.
 161                                         if ( $currev_text != $undorev_text ) {
 162                                                 $result = wfMerge($undorev_text, $oldrev_text, $currev_text, $text);
 163                                         } else {
 164                                                 $text = $oldrev_text;
 165                                                 $result = true;
 166                                         }
 167                                 } else {
 168                                         // Failed basic sanity checks.
 169                                         // Older revisions may have been removed since the link
 170                                         // was created, or we may simply have got bogus input.
 171                                         $result = false;
 172                                 }
 173
 174                                 if( $result ) {
 175                                         # Inform the user of our success and set an automatic edit summary
 176                                         $this->editFormPageTop .= $wgOut->parse( wfMsgNoTrans( 'undo-success' ) );
 177                                         $firstrev = $oldrev->getNext();
 178                                         # If we just undid one rev, use an autosummary
 179                                         if ( $firstrev->mId == $undo ) {
 180                                                 $this->summary = wfMsgForContent('undo-summary', $undo, $undorev->getUserText());
 181                                         }
 182                                         $this->formtype = 'diff';
 183                                 } else {
 184                                         # Warn the user that something went wrong
 185                                         $this->editFormPageTop .= $wgOut->parse( wfMsgNoTrans( 'undo-failure' ) );
 186                                 }
 187                         } else if( $section != '' ) {
 188                                 if( $section == 'new' ) {
 189                                         $text = $this->getPreloadedText( $preload );
 190                                 } else {
 191                                         $text = $wgParser->getSection( $text, $section, $def_text );
 192                                 }
 193                         }
 194                 }
 195
 196                 wfProfileOut( __METHOD__ );
 197                 return $text;
 198         }
 199
 200         /**
 201          * Get the contents of a page from its title and remove includeonly tags
 202          *
 203          * @param $preload String: the title of the page.
 204          * @return string The contents of the page.
 205          */
 206         private function getPreloadedText($preload) {
 207                 if ( $preload === '' )
 208                         return '';
 209                 else {
 210                         $preloadTitle = Title::newFromText( $preload );
 211                         if ( isset( $preloadTitle ) && $preloadTitle->userCanRead() ) {
 212                                 $rev=Revision::newFromTitle($preloadTitle);
 213                                 if ( is_object( $rev ) ) {
 214                                         $text = $rev->getText();
 215                                         // TODO FIXME: AAAAAAAAAAA, this shouldn't be implementing
 216                                         // its own mini-parser! -ævar
 217                                         $text = preg_replace( '~</?includeonly>~', '', $text );
 218                                         return $text;
 219                                 } else
 220                                         return '';
 221                         }
 222                 }
 223         }
 224
 225         /**
 226          * This is the function that extracts metadata from the article body on the first view.
 227          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
 228          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
 229          */
 230         function extractMetaDataFromArticle () {
 231                 global $wgUseMetadataEdit , $wgMetadataWhitelist , $wgLang ;
 232                 $this->mMetaData = '' ;
 233                 if ( !$wgUseMetadataEdit ) return ;
 234                 if ( $wgMetadataWhitelist == '' ) return ;
 235                 $s = '' ;
 236                 $t = $this->getContent();
 237
 238                 # MISSING : <nowiki> filtering
 239
 240                 # Categories and language links
 241                 $t = explode ( "\n" , $t ) ;
 242                 $catlow = strtolower ( $wgLang->getNsText ( NS_CATEGORY ) ) ;
 243                 $cat = $ll = array() ;
 244                 foreach ( $t AS $key => $x )
 245                 {
 246                         $y = trim ( strtolower ( $x ) ) ;
 247                         while ( substr ( $y , 0 , 2 ) == '[[' )
 248                         {
 249                                 $y = explode ( ']]' , trim ( $x ) ) ;
 250                                 $first = array_shift ( $y ) ;
 251                                 $first = explode ( ':' , $first ) ;
 252                                 $ns = array_shift ( $first ) ;
 253                                 $ns = trim ( str_replace ( '[' , '' , $ns ) ) ;
 254                                 if ( strlen ( $ns ) == 2 OR strtolower ( $ns ) == $catlow )
 255                                 {
 256                                         $add = '[[' . $ns . ':' . implode ( ':' , $first ) . ']]' ;
 257                                         if ( strtolower ( $ns ) == $catlow ) $cat[] = $add ;
 258                                         else $ll[] = $add ;
 259                                         $x = implode ( ']]' , $y ) ;
 260                                         $t[$key] = $x ;
 261                                         $y = trim ( strtolower ( $x ) ) ;
 262                                 }
 263                         }
 264                 }
 265                 if ( count ( $cat ) ) $s .= implode ( ' ' , $cat ) . "\n" ;
 266                 if ( count ( $ll ) ) $s .= implode ( ' ' , $ll ) . "\n" ;
 267                 $t = implode ( "\n" , $t ) ;
 268
 269                 # Load whitelist
 270                 $sat = array () ; # stand-alone-templates; must be lowercase
 271                 $wl_title = Title::newFromText ( $wgMetadataWhitelist ) ;
 272                 $wl_article = new Article ( $wl_title ) ;
 273                 $wl = explode ( "\n" , $wl_article->getContent() ) ;
 274                 foreach ( $wl AS $x )
 275                 {
 276                         $isentry = false ;
 277                         $x = trim ( $x ) ;
 278                         while ( substr ( $x , 0 , 1 ) == '*' )
 279                         {
 280                                 $isentry = true ;
 281                                 $x = trim ( substr ( $x , 1 ) ) ;
 282                         }
 283                         if ( $isentry )
 284                         {
 285                                 $sat[] = strtolower ( $x ) ;
 286                         }
 287
 288                 }
 289
 290                 # Templates, but only some
 291                 $t = explode ( '{{' , $t ) ;
 292                 $tl = array () ;
 293                 foreach ( $t AS $key => $x )
 294                 {
 295                         $y = explode ( '}}' , $x , 2 ) ;
 296                         if ( count ( $y ) == 2 )
 297                         {
 298                                 $z = $y[0] ;
 299                                 $z = explode ( '|' , $z ) ;
 300                                 $tn = array_shift ( $z ) ;
 301                                 if ( in_array ( strtolower ( $tn ) , $sat ) )
 302                                 {
 303                                         $tl[] = '{{' . $y[0] . '}}' ;
 304                                         $t[$key] = $y[1] ;
 305                                         $y = explode ( '}}' , $y[1] , 2 ) ;
 306                                 }
 307                                 else $t[$key] = '{{' . $x ;
 308                         }
 309                         else if ( $key != 0 ) $t[$key] = '{{' . $x ;
 310                         else $t[$key] = $x ;
 311                 }
 312                 if ( count ( $tl ) ) $s .= implode ( ' ' , $tl ) ;
 313                 $t = implode ( '' , $t ) ;
 314
 315                 $t = str_replace ( "\n\n\n" , "\n" , $t ) ;
 316                 $this->mArticle->mContent = $t ;
 317                 $this->mMetaData = $s ;
 318         }
 319
 320         function submit() {
 321                 $this->edit();
 322         }
 323
 324         /**
 325          * This is the function that gets called for "action=edit". It
 326          * sets up various member variables, then passes execution to
 327          * another function, usually showEditForm()
 328          *
 329          * The edit form is self-submitting, so that when things like
 330          * preview and edit conflicts occur, we get the same form back
 331          * with the extra stuff added.  Only when the final submission
 332          * is made and all is well do we actually save and redirect to
 333          * the newly-edited page.
 334          */
 335         function edit() {
 336                 global $wgOut, $wgUser, $wgRequest, $wgTitle;
 337
 338                 if ( ! wfRunHooks( 'AlternateEdit', array( &$this ) ) )
 339                         return;
 340
 341                 $fname = 'EditPage::edit';
 342                 wfProfileIn( $fname );
 343                 wfDebug( "$fname: enter\n" );
 344
 345                 // this is not an article
 346                 $wgOut->setArticleFlag(false);
 347
 348                 $this->importFormData( $wgRequest );
 349                 $this->firsttime = false;
 350
 351                 if( $this->live ) {
 352                         $this->livePreview();
 353                         wfProfileOut( $fname );
 354                         return;
 355                 }
 356
 357                 $permErrors = $this->mTitle->getUserPermissionsErrors('edit', $wgUser);
 358                 if( !$this->mTitle->exists() ) {
 359                         # We can't use array_diff here, because that considers ANY TWO
 360                         # ARRAYS TO BE EQUAL.  Thanks, PHP.
 361                         $createErrors = $this->mTitle->getUserPermissionsErrors('create', $wgUser);
 362                         foreach( $createErrors as $error ) {
 363                                 # in_array() actually *does* work as expected.
 364                                 if( !in_array( $error, $permErrors ) ) {
 365                                         $permErrors[] = $error;
 366                                 }
 367                         }
 368                 }
 369
 370                 # Ignore some permissions errors.
 371                 $remove = array();
 372                 foreach( $permErrors as $error ) {
 373                         if ($this->preview || $this->diff &&
 374                                 ($error[0] == 'blockedtext' || $error[0] == 'autoblockedtext'))
 375                         {
 376                                 // Don't worry about blocks when previewing/diffing
 377                                 $remove[] = $error;
 378                         }
 379
 380                         if ($error[0] == 'readonlytext')
 381                         {
 382                                 if ($this->edit) {
 383                                         $this->formtype = 'preview';
 384                                 } elseif ($this->save || $this->preview || $this->diff) {
 385                                         $remove[] = $error;
 386                                 }
 387                         }
 388                 }
 389                 # array_diff returns elements in $permErrors that are not in $remove.
 390                 $permErrors = array_diff( $permErrors, $remove );
 391
 392                 if ( !empty($permErrors) ) {
 393                         wfDebug( "$fname: User can't edit\n" );
 394                         $wgOut->readOnlyPage( $this->getContent(), true, $permErrors );
 395                         wfProfileOut( $fname );
 396                         return;
 397                 } else {
 398                         if ( $this->save ) {
 399                                 $this->formtype = 'save';
 400                         } else if ( $this->preview ) {
 401                                 $this->formtype = 'preview';
 402                         } else if ( $this->diff ) {
 403                                 $this->formtype = 'diff';
 404                         } else { # First time through
 405                                 $this->firsttime = true;
 406                                 if( $this->previewOnOpen() ) {
 407                                         $this->formtype = 'preview';
 408                                 } else {
 409                                         $this->extractMetaDataFromArticle () ;
 410                                         $this->formtype = 'initial';
 411                                 }
 412                         }
 413                 }
 414
 415                 wfProfileIn( "$fname-business-end" );
 416
 417                 $this->isConflict = false;
 418                 // css / js subpages of user pages get a special treatment
 419                 $this->isCssJsSubpage      = $this->mTitle->isCssJsSubpage();
 420                 $this->isValidCssJsSubpage = $this->mTitle->isValidCssJsSubpage();
 421
 422                 /* Notice that we can't use isDeleted, because it returns true if article is ever deleted
 423                  * no matter it's current state
 424                  */
 425                 $this->deletedSinceEdit = false;
 426                 if ( $this->edittime != '' ) {
 427                         /* Note that we rely on logging table, which hasn't been always there,
 428                          * but that doesn't matter, because this only applies to brand new
 429                          * deletes. This is done on every preview and save request. Move it further down
 430                          * to only perform it on saves
 431                          */
 432                         if ( $this->mTitle->isDeleted() ) {
 433                                 $this->lastDelete = $this->getLastDelete();
 434                                 if ( !is_null($this->lastDelete) ) {
 435                                         $deletetime = $this->lastDelete->log_timestamp;
 436                                         if ( ($deletetime - $this->starttime) > 0 ) {
 437                                                 $this->deletedSinceEdit = true;
 438                                         }
 439                                 }
 440                         }
 441                 }
 442
 443                 # Show applicable editing introductions
 444                 if( $this->formtype == 'initial' || $this->firsttime )
 445                         $this->showIntro();
 446
 447                 if( $this->mTitle->isTalkPage() ) {
 448                         $wgOut->addWikiText( wfMsg( 'talkpagetext' ) );
 449                 }
 450
 451                 # Attempt submission here.  This will check for edit conflicts,
 452                 # and redundantly check for locked database, blocked IPs, etc.
 453                 # that edit() already checked just in case someone tries to sneak
 454                 # in the back door with a hand-edited submission URL.
 455
 456                 if ( 'save' == $this->formtype ) {
 457                         if ( !$this->attemptSave() ) {
 458                                 wfProfileOut( "$fname-business-end" );
 459                                 wfProfileOut( $fname );
 460                                 return;
 461                         }
 462                 }
 463
 464                 # First time through: get contents, set time for conflict
 465                 # checking, etc.
 466                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 467                         if ($this->initialiseForm() === false) {
 468                                 $this->noSuchSectionPage();
 469                                 wfProfileOut( "$fname-business-end" );
 470                                 wfProfileOut( $fname );
 471                                 return;
 472                         }
 473                         if( !$this->mTitle->getArticleId() )
 474                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 475                 }
 476
 477                 $this->showEditForm();
 478                 wfProfileOut( "$fname-business-end" );
 479                 wfProfileOut( $fname );
 480         }
 481
 482         /**
 483          * Should we show a preview when the edit form is first shown?
 484          *
 485          * @return bool
 486          */
 487         private function previewOnOpen() {
 488                 global $wgRequest, $wgUser;
 489                 if( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 490                         // Explicit override from request
 491                         return true;
 492                 } elseif( $wgRequest->getVal( 'preview' ) == 'no' ) {
 493                         // Explicit override from request
 494                         return false;
 495                 } elseif( $this->section == 'new' ) {
 496                         // Nothing *to* preview for new sections
 497                         return false;
 498                 } elseif( ( $wgRequest->getVal( 'preload' ) !== '' || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 499                         // Standard preference behaviour
 500                         return true;
 501                 } elseif( !$this->mTitle->exists() && $this->mTitle->getNamespace() == NS_CATEGORY ) {
 502                         // Categories are special
 503                         return true;
 504                 } else {
 505                         return false;
 506                 }
 507         }
 508
 509         /**
 510          * @todo document
 511          * @param $request
 512          */
 513         function importFormData( &$request ) {
 514                 global $wgLang, $wgUser;
 515                 $fname = 'EditPage::importFormData';
 516                 wfProfileIn( $fname );
 517
 518                 if( $request->wasPosted() ) {
 519                         # These fields need to be checked for encoding.
 520                         # Also remove trailing whitespace, but don't remove _initial_
 521                         # whitespace from the text boxes. This may be significant formatting.
 522                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 523                         $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
 524                         $this->mMetaData = rtrim( $request->getText( 'metadata'   ) );
 525                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 526                         $this->summary   = $wgLang->truncate( $request->getText( 'wpSummary'  ), 250 );
 527
 528                         $this->edittime = $request->getVal( 'wpEdittime' );
 529                         $this->starttime = $request->getVal( 'wpStarttime' );
 530
 531                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 532
 533                         if( is_null( $this->edittime ) ) {
 534                                 # If the form is incomplete, force to preview.
 535                                 wfDebug( "$fname: Form data appears to be incomplete\n" );
 536                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 537                                 $this->preview  = true;
 538                         } else {
 539                                 /* Fallback for live preview */
 540                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 541                                 $this->diff = $request->getCheck( 'wpDiff' );
 542
 543                                 // Remember whether a save was requested, so we can indicate
 544                                 // if we forced preview due to session failure.
 545                                 $this->mTriedSave = !$this->preview;
 546
 547                                 if ( $this->tokenOk( $request ) ) {
 548                                         # Some browsers will not report any submit button
 549                                         # if the user hits enter in the comment box.
 550                                         # The unmarked state will be assumed to be a save,
 551                                         # if the form seems otherwise complete.
 552                                         wfDebug( "$fname: Passed token check.\n" );
 553                                 } else if ( $this->diff ) {
 554                                         # Failed token check, but only requested "Show Changes".
 555                                         wfDebug( "$fname: Failed token check; Show Changes requested.\n" );
 556                                 } else {
 557                                         # Page might be a hack attempt posted from
 558                                         # an external site. Preview instead of saving.
 559                                         wfDebug( "$fname: Failed token check; forcing preview\n" );
 560                                         $this->preview = true;
 561                                 }
 562                         }
 563                         $this->save    = ! ( $this->preview OR $this->diff );
 564                         if( !preg_match( '/^\d{14}$/', $this->edittime )) {
 565                                 $this->edittime = null;
 566                         }
 567
 568                         if( !preg_match( '/^\d{14}$/', $this->starttime )) {
 569                                 $this->starttime = null;
 570                         }
 571
 572                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 573
 574                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 575                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 576
 577                         # Don't force edit summaries when a user is editing their own user or talk page
 578                         if( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) && $this->mTitle->getText() == $wgUser->getName() ) {
 579                                 $this->allowBlankSummary = true;
 580                         } else {
 581                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' );
 582                         }
 583
 584                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 585                 } else {
 586                         # Not a posted form? Start with nothing.
 587                         wfDebug( "$fname: Not a posted form.\n" );
 588                         $this->textbox1  = '';
 589                         $this->textbox2  = '';
 590                         $this->mMetaData = '';
 591                         $this->summary   = '';
 592                         $this->edittime  = '';
 593                         $this->starttime = wfTimestampNow();
 594                         $this->edit      = false;
 595                         $this->preview   = false;
 596                         $this->save      = false;
 597                         $this->diff      = false;
 598                         $this->minoredit = false;
 599                         $this->watchthis = false;
 600                         $this->recreate  = false;
 601                 }
 602
 603                 $this->oldid = $request->getInt( 'oldid' );
 604
 605                 # Section edit can come from either the form or a link
 606                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 607
 608                 $this->live = $request->getCheck( 'live' );
 609                 $this->editintro = $request->getText( 'editintro' );
 610
 611                 wfProfileOut( $fname );
 612         }
 613
 614         /**
 615          * Make sure the form isn't faking a user's credentials.
 616          *
 617          * @param $request WebRequest
 618          * @return bool
 619          * @private
 620          */
 621         function tokenOk( &$request ) {
 622                 global $wgUser;
 623                 $token = $request->getVal( 'wpEditToken' );
 624                 $this->mTokenOk = $wgUser->matchEditToken( $token );
 625                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
 626                 return $this->mTokenOk;
 627         }
 628
 629         /**
 630          * Show all applicable editing introductions
 631          */
 632         private function showIntro() {
 633                 global $wgOut, $wgUser;
 634                 if( $this->suppressIntro )
 635                         return;
 636
 637                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exists
 638                 if( $this->mTitle->getNamespace() == NS_USER || $this->mTitle->getNamespace() == NS_USER_TALK ) {
 639                         $parts = explode( '/', $this->mTitle->getText(), 2 );
 640                         $username = $parts[0];
 641                         $id = User::idFromName( $username );
 642                         $ip = User::isIP( $username );
 643
 644                         if ( $id == 0 && !$ip ) {
 645                                 $wgOut->addWikiText( '<div class="mw-userpage-userdoesnotexist error">' . wfMsg( 'userpage-userdoesnotexist', $username ) . '</div>' );
 646                         }
 647                 }
 648
 649                 if( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
 650                         if( $wgUser->isLoggedIn() ) {
 651                                 $wgOut->addWikiText( '<div class="mw-newarticletext">' . wfMsg( 'newarticletext' ) . '</div>' );
 652                         } else {
 653                                 $wgOut->addWikiText( '<div class="mw-newarticletextanon">' . wfMsg( 'newarticletextanon' ) . '</div>' );
 654                         }
 655                         $this->showDeletionLog( $wgOut );
 656                 }
 657         }
 658
 659         /**
 660          * Attempt to show a custom editing introduction, if supplied
 661          *
 662          * @return bool
 663          */
 664         private function showCustomIntro() {
 665                 if( $this->editintro ) {
 666                         $title = Title::newFromText( $this->editintro );
 667                         if( $title instanceof Title && $title->exists() && $title->userCanRead() ) {
 668                                 global $wgOut;
 669                                 $revision = Revision::newFromTitle( $title );
 670                                 $wgOut->addSecondaryWikiText( $revision->getText() );
 671                                 return true;
 672                         } else {
 673                                 return false;
 674                         }
 675                 } else {
 676                         return false;
 677                 }
 678         }
 679
 680         /**
 681          * Attempt submission (no UI)
 682          * @return one of the constants describing the result
 683          */
 684         function internalAttemptSave( &$result, $bot = false ) {
 685                 global $wgSpamRegex, $wgFilterCallback, $wgUser, $wgOut, $wgParser;
 686                 global $wgMaxArticleSize, $wgTitle;
 687
 688                 $fname = 'EditPage::attemptSave';
 689                 wfProfileIn( $fname );
 690                 wfProfileIn( "$fname-checks" );
 691
 692                 if( !wfRunHooks( 'EditPage::attemptSave', array( &$this ) ) )
 693                 {
 694                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving" );
 695                         return self::AS_HOOK_ERROR;
 696                 }
 697
 698                 # Reintegrate metadata
 699                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 700                 $this->mMetaData = '' ;
 701
 702                 # Check for spam
 703                 $matches = array();
 704                 if ( $wgSpamRegex && preg_match( $wgSpamRegex, $this->textbox1, $matches ) ) {
 705                         $result['spam'] = $matches[0];
 706                         wfProfileOut( "$fname-checks" );
 707                         wfProfileOut( $fname );
 708                         return self::AS_SPAM_ERROR;
 709                 }
 710                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section ) ) {
 711                         # Error messages or other handling should be performed by the filter function
 712                         wfProfileOut( "$fname-checks" );
 713                         wfProfileOut( $fname );
 714                         return self::AS_FILTERING;
 715                 }
 716                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError ) ) ) {
 717                         # Error messages etc. could be handled within the hook...
 718                         wfProfileOut( "$fname-checks" );
 719                         wfProfileOut( $fname );
 720                         return self::AS_HOOK_ERROR;
 721                 } elseif( $this->hookError != '' ) {
 722                         # ...or the hook could be expecting us to produce an error
 723                         wfProfileOut( "$fname-checks" );
 724                         wfProfileOut( $fname );
 725                         return self::AS_HOOK_ERROR_EXPECTED;
 726                 }
 727                 if ( $wgUser->isBlockedFrom( $wgTitle, false ) ) {
 728                         # Check block state against master, thus 'false'.
 729                         wfProfileOut( "$fname-checks" );
 730                         wfProfileOut( $fname );
 731                         return self::AS_BLOCKED_PAGE_FOR_USER;
 732                 }
 733                 $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 734                 if ( $this->kblength > $wgMaxArticleSize ) {
 735                         // Error will be displayed by showEditForm()
 736                         $this->tooBig = true;
 737                         wfProfileOut( "$fname-checks" );
 738                         wfProfileOut( $fname );
 739                         return self::AS_CONTENT_TOO_BIG;
 740                 }
 741
 742                 if ( !$wgUser->isAllowed('edit') ) {
 743                         if ( $wgUser->isAnon() ) {
 744                                 wfProfileOut( "$fname-checks" );
 745                                 wfProfileOut( $fname );
 746                                 return self::AS_READ_ONLY_PAGE_ANON;
 747                         }
 748                         else {
 749                                 wfProfileOut( "$fname-checks" );
 750                                 wfProfileOut( $fname );
 751                                 return self::AS_READ_ONLY_PAGE_LOGGED;
 752                         }
 753                 }
 754
 755                 if ( wfReadOnly() ) {
 756                         wfProfileOut( "$fname-checks" );
 757                         wfProfileOut( $fname );
 758                         return self::AS_READ_ONLY_PAGE;
 759                 }
 760                 if ( $wgUser->pingLimiter() ) {
 761                         wfProfileOut( "$fname-checks" );
 762                         wfProfileOut( $fname );
 763                         return self::AS_RATE_LIMITED;
 764                 }
 765
 766                 # If the article has been deleted while editing, don't save it without
 767                 # confirmation
 768                 if ( $this->deletedSinceEdit && !$this->recreate ) {
 769                         wfProfileOut( "$fname-checks" );
 770                         wfProfileOut( $fname );
 771                         return self::AS_ARTICLE_WAS_DELETED;
 772                 }
 773
 774                 wfProfileOut( "$fname-checks" );
 775
 776                 # If article is new, insert it.
 777                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 778                 if ( 0 == $aid ) {
 779
 780                         // Late check for create permission, just in case *PARANOIA*
 781                         if ( !$this->mTitle->userCan( 'create' ) ) {
 782                                 wfDebug( "$fname: no create permission\n" );
 783                                 wfProfileOut( $fname );
 784                                 return self::AS_NO_CREATE_PERMISSION;
 785                         }
 786
 787                         # Don't save a new article if it's blank.
 788                         if ( ( '' == $this->textbox1 ) ) {
 789                                         wfProfileOut( $fname );
 790                                         return self::AS_BLANK_ARTICLE;
 791                         }
 792
 793                         // Run post-section-merge edit filter
 794                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError ) ) ) {
 795                                 # Error messages etc. could be handled within the hook...
 796                                 wfProfileOut( $fname );
 797                                 return false;
 798                         }
 799
 800                         $isComment = ( $this->section == 'new' );
 801
 802                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 803                                 $this->minoredit, $this->watchthis, false, $isComment, $bot);
 804
 805                         wfProfileOut( $fname );
 806                         return self::AS_SUCCESS_NEW_ARTICLE;
 807                 }
 808
 809                 # Article exists. Check for edit conflict.
 810
 811                 $this->mArticle->clear(); # Force reload of dates, etc.
 812                 $this->mArticle->forUpdate( true ); # Lock the article
 813
 814                 wfDebug("timestamp: {$this->mArticle->getTimestamp()}, edittime: {$this->edittime}\n");
 815
 816                 if( $this->mArticle->getTimestamp() != $this->edittime ) {
 817                         $this->isConflict = true;
 818                         if( $this->section == 'new' ) {
 819                                 if( $this->mArticle->getUserText() == $wgUser->getName() &&
 820                                         $this->mArticle->getComment() == $this->summary ) {
 821                                         // Probably a duplicate submission of a new comment.
 822                                         // This can happen when squid resends a request after
 823                                         // a timeout but the first one actually went through.
 824                                         wfDebug( "EditPage::editForm duplicate new section submission; trigger edit conflict!\n" );
 825                                 } else {
 826                                         // New comment; suppress conflict.
 827                                         $this->isConflict = false;
 828                                         wfDebug( "EditPage::editForm conflict suppressed; new section\n" );
 829                                 }
 830                         }
 831                 }
 832                 $userid = $wgUser->getID();
 833
 834                 if ( $this->isConflict) {
 835                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 836                                 $this->mArticle->getTimestamp() . "')\n" );
 837                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime);
 838                 }
 839                 else {
 840                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 841                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary);
 842                 }
 843                 if( is_null( $text ) ) {
 844                         wfDebug( "EditPage::editForm activating conflict; section replace failed.\n" );
 845                         $this->isConflict = true;
 846                         $text = $this->textbox1;
 847                 }
 848
 849                 # Suppress edit conflict with self, except for section edits where merging is required.
 850                 if ( ( $this->section == '' ) && ( 0 != $userid ) && ( $this->mArticle->getUser() == $userid ) ) {
 851                         wfDebug( "EditPage::editForm Suppressing edit conflict, same user.\n" );
 852                         $this->isConflict = false;
 853                 } else {
 854                         # switch from section editing to normal editing in edit conflict
 855                         if($this->isConflict) {
 856                                 # Attempt merge
 857                                 if( $this->mergeChangesInto( $text ) ){
 858                                         // Successful merge! Maybe we should tell the user the good news?
 859                                         $this->isConflict = false;
 860                                         wfDebug( "EditPage::editForm Suppressing edit conflict, successful merge.\n" );
 861                                 } else {
 862                                         $this->section = '';
 863                                         $this->textbox1 = $text;
 864                                         wfDebug( "EditPage::editForm Keeping edit conflict, failed merge.\n" );
 865                                 }
 866                         }
 867                 }
 868
 869                 if ( $this->isConflict ) {
 870                         wfProfileOut( $fname );
 871                         return self::AS_CONFLICT_DETECTED;
 872                 }
 873
 874                 $oldtext = $this->mArticle->getContent();
 875
 876                 // Run post-section-merge edit filter
 877                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$this->hookError ) ) ) {
 878                         # Error messages etc. could be handled within the hook...
 879                         wfProfileOut( $fname );
 880                         return false;
 881                 }
 882
 883                 # Handle the user preference to force summaries here, but not for null edits
 884                 if( $this->section != 'new' && !$this->allowBlankSummary && $wgUser->getOption( 'forceeditsummary')
 885                         &&  0 != strcmp($oldtext, $text) && !Article::getRedirectAutosummary( $text )) {
 886                         if( md5( $this->summary ) == $this->autoSumm ) {
 887                                 $this->missingSummary = true;
 888                                 wfProfileOut( $fname );
 889                                 return self::AS_SUMMARY_NEEDED;
 890                         }
 891                 }
 892
 893                 #And a similar thing for new sections
 894                 if( $this->section == 'new' && !$this->allowBlankSummary && $wgUser->getOption( 'forceeditsummary' ) ) {
 895                         if (trim($this->summary) == '') {
 896                                 $this->missingSummary = true;
 897                                 wfProfileOut( $fname );
 898                                 return self::AS_SUMMARY_NEEDED;
 899                         }
 900                 }
 901
 902                 # All's well
 903                 wfProfileIn( "$fname-sectionanchor" );
 904                 $sectionanchor = '';
 905                 if( $this->section == 'new' ) {
 906                         if ( $this->textbox1 == '' ) {
 907                                 $this->missingComment = true;
 908                                 return self::AS_TEXTBOX_EMPTY;
 909                         }
 910                         if( $this->summary != '' ) {
 911                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $this->summary );
 912                                 # This is a new section, so create a link to the new section
 913                                 # in the revision summary.
 914                                 $cleanSummary = $wgParser->stripSectionName( $this->summary );
 915                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
 916                         }
 917                 } elseif( $this->section != '' ) {
 918                         # Try to get a section anchor from the section source, redirect to edited section if header found
 919                         # XXX: might be better to integrate this into Article::replaceSection
 920                         # for duplicate heading checking and maybe parsing
 921                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 922                         # we can't deal with anchors, includes, html etc in the header for now,
 923                         # headline would need to be parsed to improve this
 924                         if($hasmatch and strlen($matches[2]) > 0) {
 925                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $matches[2] );
 926                         }
 927                 }
 928                 wfProfileOut( "$fname-sectionanchor" );
 929
 930                 // Save errors may fall down to the edit form, but we've now
 931                 // merged the section into full text. Clear the section field
 932                 // so that later submission of conflict forms won't try to
 933                 // replace that into a duplicated mess.
 934                 $this->textbox1 = $text;
 935                 $this->section = '';
 936
 937                 // Check for length errors again now that the section is merged in
 938                 $this->kblength = (int)(strlen( $text ) / 1024);
 939                 if ( $this->kblength > $wgMaxArticleSize ) {
 940                         $this->tooBig = true;
 941                         wfProfileOut( $fname );
 942                         return self::AS_MAX_ARTICLE_SIZE_EXCEDED;
 943                 }
 944
 945                 # update the article here
 946                 if( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
 947                         $this->watchthis, $bot, $sectionanchor ) ) {
 948                         wfProfileOut( $fname );
 949                         return self::AS_SUCCESS_UPDATE;
 950                 } else {
 951                         $this->isConflict = true;
 952                 }
 953                 wfProfileOut( $fname );
 954                 return self::AS_END;
 955         }
 956
 957         /**
 958          * Initialise form fields in the object
 959          * Called on the first invocation, e.g. when a user clicks an edit link
 960          */
 961         function initialiseForm() {
 962                 $this->edittime = $this->mArticle->getTimestamp();
 963                 $this->summary = '';
 964                 $this->textbox1 = $this->getContent(false);
 965                 if ($this->textbox1 === false) return false;
 966
 967                 if ( !$this->mArticle->exists() && $this->mTitle->getNamespace() == NS_MEDIAWIKI )
 968                         $this->textbox1 = wfMsgWeirdKey( $this->mTitle->getText() );
 969                 wfProxyCheck();
 970                 return true;
 971         }
 972
 973         /**
 974          * Send the edit form and related headers to $wgOut
 975          * @param $formCallback Optional callable that takes an OutputPage
 976          *                      parameter; will be called during form output
 977          *                      near the top, for captchas and the like.
 978          */
 979         function showEditForm( $formCallback=null ) {
 980                 global $wgOut, $wgUser, $wgLang, $wgContLang, $wgMaxArticleSize, $wgTitle;
 981
 982                 $fname = 'EditPage::showEditForm';
 983                 wfProfileIn( $fname );
 984
 985                 $sk = $wgUser->getSkin();
 986
 987                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) ) ;
 988
 989                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 990
 991                 # Enabled article-related sidebar, toplinks, etc.
 992                 $wgOut->setArticleRelated( true );
 993
 994                 if ( $this->formtype == 'preview' ) {
 995                         $wgOut->setPageTitleActionText( wfMsg( 'preview' ) );
 996                 }
 997
 998                 if ( $this->isConflict ) {
 999                         $s = wfMsg( 'editconflict', $wgTitle->getPrefixedText() );
1000                         $wgOut->setPageTitle( $s );
1001                         $wgOut->addWikiText( wfMsg( 'explainconflict' ) );
1002
1003                         $this->textbox2 = $this->textbox1;
1004                         $this->textbox1 = $this->getContent();
1005                         $this->edittime = $this->mArticle->getTimestamp();
1006                 } else {
1007
1008                         if( $this->section != '' ) {
1009                                 if( $this->section == 'new' ) {
1010                                         $s = wfMsg('editingcomment', $wgTitle->getPrefixedText() );
1011                                 } else {
1012                                         $s = wfMsg('editingsection', $wgTitle->getPrefixedText() );
1013                                         $matches = array();
1014                                         if( !$this->summary && !$this->preview && !$this->diff ) {
1015                                                 preg_match( "/^(=+)(.+)\\1/mi",
1016                                                         $this->textbox1,
1017                                                         $matches );
1018                                                 if( !empty( $matches[2] ) ) {
1019                                                         global $wgParser;
1020                                                         $this->summary = "/* " .
1021                                                                 $wgParser->stripSectionName(trim($matches[2])) .
1022                                                                 " */ ";
1023                                                 }
1024                                         }
1025                                 }
1026                         } else {
1027                                 $s = wfMsg( 'editing', $wgTitle->getPrefixedText() );
1028                         }
1029                         $wgOut->setPageTitle( $s );
1030
1031                         if ( $this->missingComment ) {
1032                                 $wgOut->addWikiText( '<div id="mw-missingcommenttext">' . wfMsg( 'missingcommenttext' ) . '</div>' );
1033                         }
1034
1035                         if( $this->missingSummary && $this->section != 'new' ) {
1036                                 $wgOut->addWikiText( '<div id="mw-missingsummary">' . wfMsg( 'missingsummary' ) . '</div>' );
1037                         }
1038
1039                         if( $this->missingSummary && $this->section == 'new' ) {
1040                                 $wgOut->addWikiText( '<div id="mw-missingcommentheader">' . wfMsg( 'missingcommentheader' ) . '</div>' );
1041                         }
1042
1043                         if( !$this->hookError == '' ) {
1044                                 $wgOut->addWikiText( $this->hookError );
1045                         }
1046
1047                         if ( !$this->checkUnicodeCompliantBrowser() ) {
1048                                 $wgOut->addWikiText( wfMsg( 'nonunicodebrowser') );
1049                         }
1050                         if ( isset( $this->mArticle ) && isset( $this->mArticle->mRevision ) ) {
1051                         // Let sysop know that this will make private content public if saved
1052
1053                                 if( !$this->mArticle->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1054                                         $wgOut->addWikiText( wfMsg( 'rev-deleted-text-permission' ) );
1055                                 } else if( $this->mArticle->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1056                                         $wgOut->addWikiText( wfMsg( 'rev-deleted-text-view' ) );
1057                                 }
1058
1059                                 if( !$this->mArticle->mRevision->isCurrent() ) {
1060                                         $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
1061                                         $wgOut->addWikiText( wfMsg( 'editingold' ) );
1062                                 }
1063                         }
1064                 }
1065
1066                 if( wfReadOnly() ) {
1067                         $wgOut->addHTML( '<div id="mw-read-only-warning">'.wfMsgWikiHTML( 'readonlywarning' ).'</div>' );
1068                 } elseif( $wgUser->isAnon() && $this->formtype != 'preview' ) {
1069                         $wgOut->addHTML( '<div id="mw-anon-edit-warning">'.wfMsgWikiHTML( 'anoneditwarning' ).'</div>' );
1070                 } else {
1071                         if( $this->isCssJsSubpage && $this->formtype != 'preview' ) {
1072                                 # Check the skin exists
1073                                 if( $this->isValidCssJsSubpage ) {
1074                                         $wgOut->addWikiText( wfMsg( 'usercssjsyoucanpreview' ) );
1075                                 } else {
1076                                         $wgOut->addWikiText( wfMsg( 'userinvalidcssjstitle', $wgTitle->getSkinFromCssJsSubpage() ) );
1077                                 }
1078                         }
1079                 }
1080
1081                 if( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1082                         # Show a warning if editing an interface message
1083                         $wgOut->addWikiText( wfMsg( 'editinginterface' ) );
1084                 } elseif( $this->mTitle->isProtected( 'edit' ) ) {
1085                         # Is the title semi-protected?
1086                         if( $this->mTitle->isSemiProtected() ) {
1087                                 $notice = wfMsg( 'semiprotectedpagewarning' );
1088                                 if( wfEmptyMsg( 'semiprotectedpagewarning', $notice ) || $notice == '-' )
1089                                         $notice = '';
1090                         } else {
1091                                 # Then it must be protected based on static groups (regular)
1092                                 $notice = wfMsg( 'protectedpagewarning' );
1093                         }
1094                         $wgOut->addWikiText( $notice );
1095                 }
1096                 if ( $this->mTitle->isCascadeProtected() ) {
1097                         # Is this page under cascading protection from some source pages?
1098                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
1099                         if ( count($cascadeSources) > 0 ) {
1100                                 # Explain, and list the titles responsible
1101                                 $notice = wfMsgExt( 'cascadeprotectedwarning', array('parsemag'), count($cascadeSources) ) . "\n";
1102                                 foreach( $cascadeSources as $page ) {
1103                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
1104                                 }
1105                         }
1106                         $wgOut->addWikiText( $notice );
1107                 }
1108                 if( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) != array() ){
1109                         $wgOut->addWikiText( wfMsg( 'titleprotectedwarning' ) );
1110                 }
1111
1112                 if ( $this->kblength === false ) {
1113                         $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
1114                 }
1115                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
1116                         $wgOut->addWikiText( wfMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgMaxArticleSize ) );
1117                 } elseif( $this->kblength > 29 ) {
1118                         $wgOut->addWikiText( wfMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) ) );
1119                 }
1120
1121                 #need to parse the preview early so that we know which templates are used,
1122                 #otherwise users with "show preview after edit box" will get a blank list
1123                 if ( $this->formtype == 'preview' ) {
1124                         $previewOutput = $this->getPreviewText();
1125                 }
1126
1127                 $rows = $wgUser->getIntOption( 'rows' );
1128                 $cols = $wgUser->getIntOption( 'cols' );
1129
1130                 $ew = $wgUser->getOption( 'editwidth' );
1131                 if ( $ew ) $ew = " style=\"width:100%\"";
1132                 else $ew = '';
1133
1134                 $q = 'action=submit';
1135                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
1136                 $action = $wgTitle->escapeLocalURL( $q );
1137
1138                 $summary = wfMsg('summary');
1139                 $subject = wfMsg('subject');
1140
1141                 $cancel = $sk->makeKnownLink( $wgTitle->getPrefixedText(),
1142                                 wfMsgExt('cancel', array('parseinline')) );
1143                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ));
1144                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
1145                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
1146                         htmlspecialchars( wfMsg( 'newwindow' ) );
1147
1148                 global $wgRightsText;
1149                 $copywarn = "<div id=\"editpage-copywarn\">\n" .
1150                         wfMsg( $wgRightsText ? 'copyrightwarning' : 'copyrightwarning2',
1151                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
1152                                 $wgRightsText ) . "\n</div>";
1153
1154                 if( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
1155                         # prepare toolbar for edit buttons
1156                         $toolbar = $this->getEditToolbar();
1157                 } else {
1158                         $toolbar = '';
1159                 }
1160
1161                 // activate checkboxes if user wants them to be always active
1162                 if( !$this->preview && !$this->diff ) {
1163                         # Sort out the "watch" checkbox
1164                         if( $wgUser->getOption( 'watchdefault' ) ) {
1165                                 # Watch all edits
1166                                 $this->watchthis = true;
1167                         } elseif( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1168                                 # Watch creations
1169                                 $this->watchthis = true;
1170                         } elseif( $this->mTitle->userIsWatching() ) {
1171                                 # Already watched
1172                                 $this->watchthis = true;
1173                         }
1174
1175                         if( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
1176                 }
1177
1178                 $wgOut->addHTML( $this->editFormPageTop );
1179
1180                 if ( $wgUser->getOption( 'previewontop' ) ) {
1181
1182                         if ( 'preview' == $this->formtype ) {
1183                                 $this->showPreview( $previewOutput );
1184                         } else {
1185                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
1186                         }
1187
1188                         if ( 'diff' == $this->formtype ) {
1189                                 $this->showDiff();
1190                         }
1191                 }
1192
1193
1194                 $wgOut->addHTML( $this->editFormTextTop );
1195
1196                 # if this is a comment, show a subject line at the top, which is also the edit summary.
1197                 # Otherwise, show a summary field at the bottom
1198                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
1199                 if( $this->section == 'new' ) {
1200                         $commentsubject="<span id='wpSummaryLabel'><label for='wpSummary'>{$subject}:</label></span>\n<div class='editOptions'>\n<input tabindex='1' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
1201                         $editsummary = '';
1202                         $subjectpreview = $summarytext && $this->preview ? "<div class=\"mw-summary-preview\">".wfMsg('subject-preview').':'.$sk->commentBlock( $this->summary, $this->mTitle )."</div>\n" : '';
1203                         $summarypreview = '';
1204                 } else {
1205                         $commentsubject = '';
1206                         $editsummary="<span id='wpSummaryLabel'><label for='wpSummary'>{$summary}:</label></span>\n<div class='editOptions'>\n<input tabindex='2' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
1207                         $summarypreview = $summarytext && $this->preview ? "<div class=\"mw-summary-preview\">".wfMsg('summary-preview').':'.$sk->commentBlock( $this->summary, $this->mTitle )."</div>\n" : '';
1208                         $subjectpreview = '';
1209                 }
1210
1211                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
1212                 if( !$this->preview && !$this->diff ) {
1213                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
1214                 }
1215                 $templates = ($this->preview || $this->section != '') ? $this->mPreviewTemplates : $this->mArticle->getUsedTemplates();
1216                 $formattedtemplates = $sk->formatTemplates( $templates, $this->preview, $this->section != '');
1217
1218                 global $wgUseMetadataEdit ;
1219                 if ( $wgUseMetadataEdit ) {
1220                         $metadata = $this->mMetaData ;
1221                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
1222                         $top = wfMsgWikiHtml( 'metadata_help' );
1223                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
1224                 }
1225                 else $metadata = "" ;
1226
1227                 $hidden = '';
1228                 $recreate = '';
1229                 if ($this->deletedSinceEdit) {
1230                         if ( 'save' != $this->formtype ) {
1231                                 $wgOut->addWikiText( wfMsg('deletedwhileediting'));
1232                         } else {
1233                                 // Hide the toolbar and edit area, use can click preview to get it back
1234                                 // Add an confirmation checkbox and explanation.
1235                                 $toolbar = '';
1236                                 $hidden = 'type="hidden" style="display:none;"';
1237                                 $recreate = $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ));
1238                                 $recreate .=
1239                                         "<br /><input tabindex='1' type='checkbox' value='1' name='wpRecreate' id='wpRecreate' />".
1240                                         "<label for='wpRecreate' title='".wfMsg('tooltip-recreate')."'>". wfMsg('recreate')."</label>";
1241                         }
1242                 }
1243
1244                 $tabindex = 2;
1245
1246                 $checkboxes = self::getCheckboxes( $tabindex, $sk,
1247                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
1248
1249                 $checkboxhtml = implode( $checkboxes, "\n" );
1250
1251                 $buttons = $this->getEditButtons( $tabindex );
1252                 $buttonshtml = implode( $buttons, "\n" );
1253
1254                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
1255                         ? '' : Xml::hidden( 'safemode', '1' );
1256
1257                 $wgOut->addHTML( <<<END
1258 {$toolbar}
1259 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1260 END
1261 );
1262
1263                 if( is_callable( $formCallback ) ) {
1264                         call_user_func_array( $formCallback, array( &$wgOut ) );
1265                 }
1266
1267                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1268
1269                 // Put these up at the top to ensure they aren't lost on early form submission
1270                 $wgOut->addHTML( "
1271 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
1272 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
1273 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
1274 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
1275
1276                 $wgOut->addHTML( <<<END
1277 $recreate
1278 {$commentsubject}
1279 {$subjectpreview}
1280 {$this->editFormTextBeforeContent}
1281 <textarea tabindex='1' accesskey="," name="wpTextbox1" id="wpTextbox1" rows='{$rows}'
1282 cols='{$cols}'{$ew} $hidden>
1283 END
1284 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox1 ) ) .
1285 "
1286 </textarea>
1287                 " );
1288
1289                 $wgOut->addWikiText( $copywarn );
1290                 $wgOut->addHTML( $this->editFormTextAfterWarn );
1291                 $wgOut->addHTML( "
1292 {$metadata}
1293 {$editsummary}
1294 {$summarypreview}
1295 {$checkboxhtml}
1296 {$safemodehtml}
1297 ");
1298
1299                 $wgOut->addHTML(
1300 "<div class='editButtons'>
1301 {$buttonshtml}
1302         <span class='editHelp'>{$cancel} | {$edithelp}</span>
1303 </div><!-- editButtons -->
1304 </div><!-- editOptions -->");
1305
1306                 $wgOut->addHtml( '<div class="mw-editTools">' );
1307                 $wgOut->addWikiText( wfMsgForContent( 'edittools' ) );
1308                 $wgOut->addHtml( '</div>' );
1309
1310                 $wgOut->addHTML( $this->editFormTextAfterTools );
1311
1312                 $wgOut->addHTML( "
1313 <div class='templatesUsed'>
1314 {$formattedtemplates}
1315 </div>
1316 " );
1317
1318                 /**
1319                  * To make it harder for someone to slip a user a page
1320                  * which submits an edit form to the wiki without their
1321                  * knowledge, a random token is associated with the login
1322                  * session. If it's not passed back with the submission,
1323                  * we won't save the page, or render user JavaScript and
1324                  * CSS previews.
1325                  *
1326                  * For anon editors, who may not have a session, we just
1327                  * include the constant suffix to prevent editing from
1328                  * broken text-mangling proxies.
1329                  */
1330                 $token = htmlspecialchars( $wgUser->editToken() );
1331                 $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
1332
1333
1334                 # If a blank edit summary was previously provided, and the appropriate
1335                 # user preference is active, pass a hidden tag here. This will stop the
1336                 # user being bounced back more than once in the event that a summary
1337                 # is not required.
1338                 if( $this->missingSummary ) {
1339                         $wgOut->addHTML( "<input type=\"hidden\" name=\"wpIgnoreBlankSummary\" value=\"1\" />\n" );
1340                 }
1341
1342                 # For a bit more sophisticated detection of blank summaries, hash the
1343                 # automatic one and pass that in a hidden field.
1344                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1345                 $wgOut->addHtml( wfHidden( 'wpAutoSummary', $autosumm ) );
1346
1347                 if ( $this->isConflict ) {
1348                         $wgOut->addWikiText( '==' . wfMsg( "yourdiff" ) . '==' );
1349
1350                         $de = new DifferenceEngine( $this->mTitle );
1351                         $de->setText( $this->textbox2, $this->textbox1 );
1352                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1353
1354                         $wgOut->addWikiText( '==' . wfMsg( "yourtext" ) . '==' );
1355                         $wgOut->addHTML( "<textarea tabindex='6' id='wpTextbox2' name=\"wpTextbox2\" rows='{$rows}' cols='{$cols}'>"
1356                                 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox2 ) ) . "\n</textarea>" );
1357                 }
1358                 $wgOut->addHTML( $this->editFormTextBottom );
1359                 $wgOut->addHTML( "</form>\n" );
1360                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1361
1362                         if ( $this->formtype == 'preview') {
1363                                 $this->showPreview( $previewOutput );
1364                         } else {
1365                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
1366                         }
1367
1368                         if ( $this->formtype == 'diff') {
1369                                 $this->showDiff();
1370                         }
1371
1372                 }
1373
1374                 wfProfileOut( $fname );
1375         }
1376
1377         /**
1378          * Append preview output to $wgOut.
1379          * Includes category rendering if this is a category page.
1380          *
1381          * @param string $text The HTML to be output for the preview.
1382          */
1383         private function showPreview( $text ) {
1384                 global $wgOut;
1385
1386                 $wgOut->addHTML( '<div id="wikiPreview">' );
1387                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1388                         $this->mArticle->openShowCategory();
1389                 }
1390                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
1391                 $wgOut->addHTML( $text );
1392                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1393                         $this->mArticle->closeShowCategory();
1394                 }
1395                 $wgOut->addHTML( '</div>' );
1396         }
1397
1398         /**
1399          * Live Preview lets us fetch rendered preview page content and
1400          * add it to the page without refreshing the whole page.
1401          * If not supported by the browser it will fall through to the normal form
1402          * submission method.
1403          *
1404          * This function outputs a script tag to support live preview, and
1405          * returns an onclick handler which should be added to the attributes
1406          * of the preview button
1407          */
1408         function doLivePreviewScript() {
1409                 global $wgStylePath, $wgJsMimeType, $wgStyleVersion, $wgOut, $wgTitle;
1410                 $wgOut->addHTML( '<script type="'.$wgJsMimeType.'" src="' .
1411                         htmlspecialchars( "$wgStylePath/common/preview.js?$wgStyleVersion" ) .
1412                         '"></script>' . "\n" );
1413                 $liveAction = $wgTitle->getLocalUrl( 'action=submit&wpPreview=true&live=true' );
1414                 return "return !lpDoPreview(" .
1415                         "editform.wpTextbox1.value," .
1416                         '"' . $liveAction . '"' . ")";
1417         }
1418
1419         function getLastDelete() {
1420                 $dbr = wfGetDB( DB_SLAVE );
1421                 $fname = 'EditPage::getLastDelete';
1422                 $res = $dbr->select(
1423                         array( 'logging', 'user' ),
1424                         array( 'log_type',
1425                                'log_action',
1426                                'log_timestamp',
1427                                'log_user',
1428                                'log_namespace',
1429                                'log_title',
1430                                'log_comment',
1431                                'log_params',
1432                                'user_name', ),
1433                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1434                                'log_title' => $this->mTitle->getDBkey(),
1435                                'log_type' => 'delete',
1436                                'log_action' => 'delete',
1437                                'user_id=log_user' ),
1438                         $fname,
1439                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
1440
1441                 if($dbr->numRows($res) == 1) {
1442                         while ( $x = $dbr->fetchObject ( $res ) )
1443                                 $data = $x;
1444                         $dbr->freeResult ( $res ) ;
1445                 } else {
1446                         $data = null;
1447                 }
1448                 return $data;
1449         }
1450
1451         /**
1452          * @todo document
1453          */
1454         function getPreviewText() {
1455                 global $wgOut, $wgUser, $wgTitle, $wgParser;
1456
1457                 $fname = 'EditPage::getPreviewText';
1458                 wfProfileIn( $fname );
1459
1460                 if ( $this->mTriedSave && !$this->mTokenOk ) {
1461                         if ( $this->mTokenOkExceptSuffix ) {
1462                                 $note = wfMsg( 'token_suffix_mismatch' );
1463                         } else {
1464                                 $note = wfMsg( 'session_fail_preview' );
1465                         }
1466                 } else {
1467                         $note = wfMsg( 'previewnote' );
1468                 }
1469
1470                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1471                 $parserOptions->setEditSection( false );
1472
1473                 global $wgRawHtml;
1474                 if( $wgRawHtml && !$this->mTokenOk ) {
1475                         // Could be an offsite preview attempt. This is very unsafe if
1476                         // HTML is enabled, as it could be an attack.
1477                         return $wgOut->parse( "<div class='previewnote'>" .
1478                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1479                 }
1480
1481                 # don't parse user css/js, show message about preview
1482                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1483
1484                 if ( $this->isCssJsSubpage ) {
1485                         if(preg_match("/\\.css$/", $this->mTitle->getText() ) ) {
1486                                 $previewtext = wfMsg('usercsspreview');
1487                         } else if(preg_match("/\\.js$/", $this->mTitle->getText() ) ) {
1488                                 $previewtext = wfMsg('userjspreview');
1489                         }
1490                         $parserOptions->setTidy(true);
1491                         $parserOutput = $wgParser->parse( $previewtext , $this->mTitle, $parserOptions );
1492                         $wgOut->addHTML( $parserOutput->mText );
1493                         $previewHTML = '';
1494                 } else {
1495                         $toparse = $this->textbox1;
1496
1497                         # If we're adding a comment, we need to show the
1498                         # summary as the headline
1499                         if($this->section=="new" && $this->summary!="") {
1500                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1501                         }
1502
1503                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData ;
1504                         $parserOptions->setTidy(true);
1505                         $parserOptions->enableLimitReport();
1506                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ) ."\n\n",
1507                                         $this->mTitle, $parserOptions );
1508
1509                         $previewHTML = $parserOutput->getText();
1510                         $wgOut->addParserOutputNoText( $parserOutput );
1511
1512                         # ParserOutput might have altered the page title, so reset it
1513                         $wgOut->setPageTitle( wfMsg( 'editing', $wgTitle->getPrefixedText() ) );
1514
1515                         foreach ( $parserOutput->getTemplates() as $ns => $template)
1516                                 foreach ( array_keys( $template ) as $dbk)
1517                                         $this->mPreviewTemplates[] = Title::makeTitle($ns, $dbk);
1518
1519                         if ( count( $parserOutput->getWarnings() ) ) {
1520                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
1521                         }
1522                 }
1523
1524                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
1525                         "<div class='previewnote'>" . $wgOut->parse( $note ) . "</div>\n";
1526                 if ( $this->isConflict ) {
1527                         $previewhead.='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1528                 }
1529
1530                 wfProfileOut( $fname );
1531                 return $previewhead . $previewHTML;
1532         }
1533
1534         /**
1535          * Call the stock "user is blocked" page
1536          */
1537         function blockedPage() {
1538                 global $wgOut, $wgUser;
1539                 $wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
1540
1541                 # If the user made changes, preserve them when showing the markup
1542                 # (This happens when a user is blocked during edit, for instance)
1543                 $first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
1544                 if( $first ) {
1545                         $source = $this->mTitle->exists() ? $this->getContent() : false;
1546                 } else {
1547                         $source = $this->textbox1;
1548                 }
1549
1550                 # Spit out the source or the user's modified version
1551                 if( $source !== false ) {
1552                         $rows = $wgUser->getOption( 'rows' );
1553                         $cols = $wgUser->getOption( 'cols' );
1554                         $attribs = array( 'id' => 'wpTextbox1', 'name' => 'wpTextbox1', 'cols' => $cols, 'rows' => $rows, 'readonly' => 'readonly' );
1555                         $wgOut->addHtml( '<hr />' );
1556                         $wgOut->addWikiText( wfMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() ) );
1557                         $wgOut->addHtml( wfOpenElement( 'textarea', $attribs ) . htmlspecialchars( $source ) . wfCloseElement( 'textarea' ) );
1558                 }
1559         }
1560
1561         /**
1562          * Produce the stock "please login to edit pages" page
1563          */
1564         function userNotLoggedInPage() {
1565                 global $wgUser, $wgOut, $wgTitle;
1566                 $skin = $wgUser->getSkin();
1567
1568                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1569                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $wgTitle->getPrefixedUrl() );
1570
1571                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1572                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1573                 $wgOut->setArticleRelated( false );
1574
1575                 $wgOut->addHtml( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
1576                 $wgOut->returnToMain( false, $wgTitle );
1577         }
1578
1579         /**
1580          * Creates a basic error page which informs the user that
1581          * they have attempted to edit a nonexistant section.
1582          */
1583         function noSuchSectionPage() {
1584                 global $wgOut, $wgTitle;
1585
1586                 $wgOut->setPageTitle( wfMsg( 'nosuchsectiontitle' ) );
1587                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1588                 $wgOut->setArticleRelated( false );
1589
1590                 $wgOut->addWikiText( wfMsg( 'nosuchsectiontext', $this->section ) );
1591                 $wgOut->returnToMain( false, $wgTitle );
1592         }
1593
1594         /**
1595          * Produce the stock "your edit contains spam" page
1596          *
1597          * @param $match Text which triggered one or more filters
1598          */
1599         function spamPage( $match = false ) {
1600                 global $wgOut, $wgTitle;
1601
1602                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1603                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1604                 $wgOut->setArticleRelated( false );
1605
1606                 $wgOut->addHtml( '<div id="spamprotected">' );
1607                 $wgOut->addWikiText( wfMsg( 'spamprotectiontext' ) );
1608                 if ( $match )
1609                         $wgOut->addWikiText( wfMsg( 'spamprotectionmatch',wfEscapeWikiText( $match ) ) );
1610                 $wgOut->addHtml( '</div>' );
1611
1612                 $wgOut->returnToMain( false, $wgTitle );
1613         }
1614
1615         /**
1616          * @private
1617          * @todo document
1618          */
1619         function mergeChangesInto( &$editText ){
1620                 $fname = 'EditPage::mergeChangesInto';
1621                 wfProfileIn( $fname );
1622
1623                 $db = wfGetDB( DB_MASTER );
1624
1625                 // This is the revision the editor started from
1626                 $baseRevision = Revision::loadFromTimestamp(
1627                         $db, $this->mTitle, $this->edittime );
1628                 if( is_null( $baseRevision ) ) {
1629                         wfProfileOut( $fname );
1630                         return false;
1631                 }
1632                 $baseText = $baseRevision->getText();
1633
1634                 // The current state, we want to merge updates into it
1635                 $currentRevision =  Revision::loadFromTitle(
1636                         $db, $this->mTitle );
1637                 if( is_null( $currentRevision ) ) {
1638                         wfProfileOut( $fname );
1639                         return false;
1640                 }
1641                 $currentText = $currentRevision->getText();
1642
1643                 $result = '';
1644                 if( wfMerge( $baseText, $editText, $currentText, $result ) ){
1645                         $editText = $result;
1646                         wfProfileOut( $fname );
1647                         return true;
1648                 } else {
1649                         wfProfileOut( $fname );
1650                         return false;
1651                 }
1652         }
1653
1654         /**
1655          * Check if the browser is on a blacklist of user-agents known to
1656          * mangle UTF-8 data on form submission. Returns true if Unicode
1657          * should make it through, false if it's known to be a problem.
1658          * @return bool
1659          * @private
1660          */
1661         function checkUnicodeCompliantBrowser() {
1662                 global $wgBrowserBlackList;
1663                 if( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
1664                         // No User-Agent header sent? Trust it by default...
1665                         return true;
1666                 }
1667                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1668                 foreach ( $wgBrowserBlackList as $browser ) {
1669                         if ( preg_match($browser, $currentbrowser) ) {
1670                                 return false;
1671                         }
1672                 }
1673                 return true;
1674         }
1675
1676         /**
1677          * @deprecated use $wgParser->stripSectionName()
1678          */
1679         function pseudoParseSectionAnchor( $text ) {
1680                 global $wgParser;
1681                 return $wgParser->stripSectionName( $text );
1682         }
1683
1684         /**
1685          * Format an anchor fragment as it would appear for a given section name
1686          * @param string $text
1687          * @return string
1688          * @private
1689          */
1690         function sectionAnchor( $text ) {
1691                 global $wgParser;
1692                 return $wgParser->guessSectionNameFromWikiText( $text );
1693         }
1694
1695         /**
1696          * Shows a bulletin board style toolbar for common editing functions.
1697          * It can be disabled in the user preferences.
1698          * The necessary JavaScript code can be found in style/wikibits.js.
1699          */
1700         function getEditToolbar() {
1701                 global $wgStylePath, $wgContLang, $wgJsMimeType;
1702
1703                 /**
1704                  * toolarray an array of arrays which each include the filename of
1705                  * the button image (without path), the opening tag, the closing tag,
1706                  * and optionally a sample text that is inserted between the two when no
1707                  * selection is highlighted.
1708                  * The tip text is shown when the user moves the mouse over the button.
1709                  *
1710                  * Already here are accesskeys (key), which are not used yet until someone
1711                  * can figure out a way to make them work in IE. However, we should make
1712                  * sure these keys are not defined on the edit page.
1713                  */
1714                 $toolarray = array(
1715                         array(  'image' => 'button_bold.png',
1716                                 'id'    => 'mw-editbutton-bold',
1717                                 'open'  => '\\\'\\\'\\\'',
1718                                 'close' => '\\\'\\\'\\\'',
1719                                 'sample'=> wfMsg('bold_sample'),
1720                                 'tip'   => wfMsg('bold_tip'),
1721                                 'key'   => 'B'
1722                         ),
1723                         array(  'image' => 'button_italic.png',
1724                                 'id'    => 'mw-editbutton-italic',
1725                                 'open'  => '\\\'\\\'',
1726                                 'close' => '\\\'\\\'',
1727                                 'sample'=> wfMsg('italic_sample'),
1728                                 'tip'   => wfMsg('italic_tip'),
1729                                 'key'   => 'I'
1730                         ),
1731                         array(  'image' => 'button_link.png',
1732                                 'id'    => 'mw-editbutton-link',
1733                                 'open'  => '[[',
1734                                 'close' => ']]',
1735                                 'sample'=> wfMsg('link_sample'),
1736                                 'tip'   => wfMsg('link_tip'),
1737                                 'key'   => 'L'
1738                         ),
1739                         array(  'image' => 'button_extlink.png',
1740                                 'id'    => 'mw-editbutton-extlink',
1741                                 'open'  => '[',
1742                                 'close' => ']',
1743                                 'sample'=> wfMsg('extlink_sample'),
1744                                 'tip'   => wfMsg('extlink_tip'),
1745                                 'key'   => 'X'
1746                         ),
1747                         array(  'image' => 'button_headline.png',
1748                                 'id'    => 'mw-editbutton-headline',
1749                                 'open'  => "\\n== ",
1750                                 'close' => " ==\\n",
1751                                 'sample'=> wfMsg('headline_sample'),
1752                                 'tip'   => wfMsg('headline_tip'),
1753                                 'key'   => 'H'
1754                         ),
1755                         array(  'image' => 'button_image.png',
1756                                 'id'    => 'mw-editbutton-image',
1757                                 'open'  => '[['.$wgContLang->getNsText(NS_IMAGE).":",
1758                                 'close' => ']]',
1759                                 'sample'=> wfMsg('image_sample'),
1760                                 'tip'   => wfMsg('image_tip'),
1761                                 'key'   => 'D'
1762                         ),
1763                         array(  'image' => 'button_media.png',
1764                                 'id'    => 'mw-editbutton-media',
1765                                 'open'  => '[['.$wgContLang->getNsText(NS_MEDIA).':',
1766                                 'close' => ']]',
1767                                 'sample'=> wfMsg('media_sample'),
1768                                 'tip'   => wfMsg('media_tip'),
1769                                 'key'   => 'M'
1770                         ),
1771                         array(  'image' => 'button_math.png',
1772                                 'id'    => 'mw-editbutton-math',
1773                                 'open'  => "<math>",
1774                                 'close' => "<\\/math>",
1775                                 'sample'=> wfMsg('math_sample'),
1776                                 'tip'   => wfMsg('math_tip'),
1777                                 'key'   => 'C'
1778                         ),
1779                         array(  'image' => 'button_nowiki.png',
1780                                 'id'    => 'mw-editbutton-nowiki',
1781                                 'open'  => "<nowiki>",
1782                                 'close' => "<\\/nowiki>",
1783                                 'sample'=> wfMsg('nowiki_sample'),
1784                                 'tip'   => wfMsg('nowiki_tip'),
1785                                 'key'   => 'N'
1786                         ),
1787                         array(  'image' => 'button_sig.png',
1788                                 'id'    => 'mw-editbutton-signature',
1789                                 'open'  => '--~~~~',
1790                                 'close' => '',
1791                                 'sample'=> '',
1792                                 'tip'   => wfMsg('sig_tip'),
1793                                 'key'   => 'Y'
1794                         ),
1795                         array(  'image' => 'button_hr.png',
1796                                 'id'    => 'mw-editbutton-hr',
1797                                 'open'  => "\\n----\\n",
1798                                 'close' => '',
1799                                 'sample'=> '',
1800                                 'tip'   => wfMsg('hr_tip'),
1801                                 'key'   => 'R'
1802                         )
1803                 );
1804                 $toolbar = "<div id='toolbar'>\n";
1805                 $toolbar.="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
1806
1807                 foreach($toolarray as $tool) {
1808
1809                         $cssId = $tool['id'];
1810                         $image=$wgStylePath.'/common/images/'.$tool['image'];
1811                         $open=$tool['open'];
1812                         $close=$tool['close'];
1813                         $sample = wfEscapeJsString( $tool['sample'] );
1814
1815                         // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
1816                         // Older browsers show a "speedtip" type message only for ALT.
1817                         // Ideally these should be different, realistically they
1818                         // probably don't need to be.
1819                         $tip = wfEscapeJsString( $tool['tip'] );
1820
1821                         #$key = $tool["key"];
1822
1823                         $toolbar.="addButton('$image','$tip','$open','$close','$sample','$cssId');\n";
1824                 }
1825
1826                 $toolbar.="/*]]>*/\n</script>";
1827                 $toolbar.="\n</div>";
1828                 return $toolbar;
1829         }
1830
1831         /**
1832          * Returns an array of html code of the following checkboxes:
1833          * minor and watch
1834          *
1835          * @param $tabindex Current tabindex
1836          * @param $skin Skin object
1837          * @param $checked Array of checkbox => bool, where bool indicates the checked
1838          *                 status of the checkbox
1839          *
1840          * @return array
1841          */
1842         public static function getCheckboxes( &$tabindex, $skin, $checked ) {
1843                 global $wgUser;
1844
1845                 $checkboxes = array();
1846
1847                 $checkboxes['minor'] = '';
1848                 $minorLabel = wfMsgExt('minoredit', array('parseinline'));
1849                 if ( $wgUser->isAllowed('minoredit') ) {
1850                         $attribs = array(
1851                                 'tabindex'  => ++$tabindex,
1852                                 'accesskey' => wfMsg( 'accesskey-minoredit' ),
1853                                 'id'        => 'wpMinoredit',
1854                         );
1855                         $checkboxes['minor'] =
1856                                 Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
1857                                 "&nbsp;<label for='wpMinoredit'".$skin->tooltipAndAccesskey('minoredit').">{$minorLabel}</label>";
1858                 }
1859
1860                 $watchLabel = wfMsgExt('watchthis', array('parseinline'));
1861                 $checkboxes['watch'] = '';
1862                 if ( $wgUser->isLoggedIn() ) {
1863                         $attribs = array(
1864                                 'tabindex'  => ++$tabindex,
1865                                 'accesskey' => wfMsg( 'accesskey-watch' ),
1866                                 'id'        => 'wpWatchthis',
1867                         );
1868                         $checkboxes['watch'] =
1869                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
1870                                 "&nbsp;<label for='wpWatchthis'".$skin->tooltipAndAccesskey('watch').">{$watchLabel}</label>";
1871                 }
1872                 return $checkboxes;
1873         }
1874
1875         /**
1876          * Returns an array of html code of the following buttons:
1877          * save, diff, preview and live
1878          *
1879          * @param $tabindex Current tabindex
1880          *
1881          * @return array
1882          */
1883         public function getEditButtons(&$tabindex) {
1884                 global $wgLivePreview, $wgUser;
1885
1886                 $buttons = array();
1887
1888                 $temp = array(
1889                         'id'        => 'wpSave',
1890                         'name'      => 'wpSave',
1891                         'type'      => 'submit',
1892                         'tabindex'  => ++$tabindex,
1893                         'value'     => wfMsg('savearticle'),
1894                         'accesskey' => wfMsg('accesskey-save'),
1895                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
1896                 );
1897                 $buttons['save'] = wfElement('input', $temp, '');
1898
1899                 ++$tabindex; // use the same for preview and live preview
1900                 if ( $wgLivePreview && $wgUser->getOption( 'uselivepreview' ) ) {
1901                         $temp = array(
1902                                 'id'        => 'wpPreview',
1903                                 'name'      => 'wpPreview',
1904                                 'type'      => 'submit',
1905                                 'tabindex'  => $tabindex,
1906                                 'value'     => wfMsg('showpreview'),
1907                                 'accesskey' => '',
1908                                 'title'     => wfMsg( 'tooltip-preview' ).' ['.wfMsg( 'accesskey-preview' ).']',
1909                                 'style'     => 'display: none;',
1910                         );
1911                         $buttons['preview'] = wfElement('input', $temp, '');
1912
1913                         $temp = array(
1914                                 'id'        => 'wpLivePreview',
1915                                 'name'      => 'wpLivePreview',
1916                                 'type'      => 'submit',
1917                                 'tabindex'  => $tabindex,
1918                                 'value'     => wfMsg('showlivepreview'),
1919                                 'accesskey' => wfMsg('accesskey-preview'),
1920                                 'title'     => '',
1921                                 'onclick'   => $this->doLivePreviewScript(),
1922                         );
1923                         $buttons['live'] = wfElement('input', $temp, '');
1924                 } else {
1925                         $temp = array(
1926                                 'id'        => 'wpPreview',
1927                                 'name'      => 'wpPreview',
1928                                 'type'      => 'submit',
1929                                 'tabindex'  => $tabindex,
1930                                 'value'     => wfMsg('showpreview'),
1931                                 'accesskey' => wfMsg('accesskey-preview'),
1932                                 'title'     => wfMsg( 'tooltip-preview' ).' ['.wfMsg( 'accesskey-preview' ).']',
1933                         );
1934                         $buttons['preview'] = wfElement('input', $temp, '');
1935                         $buttons['live'] = '';
1936                 }
1937
1938                 $temp = array(
1939                         'id'        => 'wpDiff',
1940                         'name'      => 'wpDiff',
1941                         'type'      => 'submit',
1942                         'tabindex'  => ++$tabindex,
1943                         'value'     => wfMsg('showdiff'),
1944                         'accesskey' => wfMsg('accesskey-diff'),
1945                         'title'     => wfMsg( 'tooltip-diff' ).' ['.wfMsg( 'accesskey-diff' ).']',
1946                 );
1947                 $buttons['diff'] = wfElement('input', $temp, '');
1948
1949                 return $buttons;
1950         }
1951
1952         /**
1953          * Output preview text only. This can be sucked into the edit page
1954          * via JavaScript, and saves the server time rendering the skin as
1955          * well as theoretically being more robust on the client (doesn't
1956          * disturb the edit box's undo history, won't eat your text on
1957          * failure, etc).
1958          *
1959          * @todo This doesn't include category or interlanguage links.
1960          *       Would need to enhance it a bit, <s>maybe wrap them in XML
1961          *       or something...</s> that might also require more skin
1962          *       initialization, so check whether that's a problem.
1963          */
1964         function livePreview() {
1965                 global $wgOut;
1966                 $wgOut->disable();
1967                 header( 'Content-type: text/xml; charset=utf-8' );
1968                 header( 'Cache-control: no-cache' );
1969
1970                 $previewText = $this->getPreviewText();
1971                 #$categories = $skin->getCategoryLinks();
1972
1973                 $s =
1974                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
1975                 Xml::tags( 'livepreview', null,
1976                         Xml::element( 'preview', null, $previewText )
1977                         #.      Xml::element( 'category', null, $categories )
1978                 );
1979                 echo $s;
1980         }
1981
1982
1983         /**
1984          * Get a diff between the current contents of the edit box and the
1985          * version of the page we're editing from.
1986          *
1987          * If this is a section edit, we'll replace the section as for final
1988          * save and then make a comparison.
1989          */
1990         function showDiff() {
1991                 $oldtext = $this->mArticle->fetchContent();
1992                 $newtext = $this->mArticle->replaceSection(
1993                         $this->section, $this->textbox1, $this->summary, $this->edittime );
1994                 $newtext = $this->mArticle->preSaveTransform( $newtext );
1995                 $oldtitle = wfMsgExt( 'currentrev', array('parseinline') );
1996                 $newtitle = wfMsgExt( 'yourtext', array('parseinline') );
1997                 if ( $oldtext !== false  || $newtext != '' ) {
1998                         $de = new DifferenceEngine( $this->mTitle );
1999                         $de->setText( $oldtext, $newtext );
2000                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2001                         $de->showDiffStyle();
2002                 } else {
2003                         $difftext = '';
2004                 }
2005
2006                 global $wgOut;
2007                 $wgOut->addHtml( '<div id="wikiDiff">' . $difftext . '</div>' );
2008         }
2009
2010         /**
2011          * Filter an input field through a Unicode de-armoring process if it
2012          * came from an old browser with known broken Unicode editing issues.
2013          *
2014          * @param WebRequest $request
2015          * @param string $field
2016          * @return string
2017          * @private
2018          */
2019         function safeUnicodeInput( $request, $field ) {
2020                 $text = rtrim( $request->getText( $field ) );
2021                 return $request->getBool( 'safemode' )
2022                         ? $this->unmakesafe( $text )
2023                         : $text;
2024         }
2025
2026         /**
2027          * Filter an output field through a Unicode armoring process if it is
2028          * going to an old browser with known broken Unicode editing issues.
2029          *
2030          * @param string $text
2031          * @return string
2032          * @private
2033          */
2034         function safeUnicodeOutput( $text ) {
2035                 global $wgContLang;
2036                 $codedText = $wgContLang->recodeForEdit( $text );
2037                 return $this->checkUnicodeCompliantBrowser()
2038                         ? $codedText
2039                         : $this->makesafe( $codedText );
2040         }
2041
2042         /**
2043          * A number of web browsers are known to corrupt non-ASCII characters
2044          * in a UTF-8 text editing environment. To protect against this,
2045          * detected browsers will be served an armored version of the text,
2046          * with non-ASCII chars converted to numeric HTML character references.
2047          *
2048          * Preexisting such character references will have a 0 added to them
2049          * to ensure that round-trips do not alter the original data.
2050          *
2051          * @param string $invalue
2052          * @return string
2053          * @private
2054          */
2055         function makesafe( $invalue ) {
2056                 // Armor existing references for reversability.
2057                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
2058
2059                 $bytesleft = 0;
2060                 $result = "";
2061                 $working = 0;
2062                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2063                         $bytevalue = ord( $invalue{$i} );
2064                         if( $bytevalue <= 0x7F ) { //0xxx xxxx
2065                                 $result .= chr( $bytevalue );
2066                                 $bytesleft = 0;
2067                         } elseif( $bytevalue <= 0xBF ) { //10xx xxxx
2068                                 $working = $working << 6;
2069                                 $working += ($bytevalue & 0x3F);
2070                                 $bytesleft--;
2071                                 if( $bytesleft <= 0 ) {
2072                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
2073                                 }
2074                         } elseif( $bytevalue <= 0xDF ) { //110x xxxx
2075                                 $working = $bytevalue & 0x1F;
2076                                 $bytesleft = 1;
2077                         } elseif( $bytevalue <= 0xEF ) { //1110 xxxx
2078                                 $working = $bytevalue & 0x0F;
2079                                 $bytesleft = 2;
2080                         } else { //1111 0xxx
2081                                 $working = $bytevalue & 0x07;
2082                                 $bytesleft = 3;
2083                         }
2084                 }
2085                 return $result;
2086         }
2087
2088         /**
2089          * Reverse the previously applied transliteration of non-ASCII characters
2090          * back to UTF-8. Used to protect data from corruption by broken web browsers
2091          * as listed in $wgBrowserBlackList.
2092          *
2093          * @param string $invalue
2094          * @return string
2095          * @private
2096          */
2097         function unmakesafe( $invalue ) {
2098                 $result = "";
2099                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2100                         if( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
2101                                 $i += 3;
2102                                 $hexstring = "";
2103                                 do {
2104                                         $hexstring .= $invalue{$i};
2105                                         $i++;
2106                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
2107
2108                                 // Do some sanity checks. These aren't needed for reversability,
2109                                 // but should help keep the breakage down if the editor
2110                                 // breaks one of the entities whilst editing.
2111                                 if ((substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6)) {
2112                                         $codepoint = hexdec($hexstring);
2113                                         $result .= codepointToUtf8( $codepoint );
2114                                 } else {
2115                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
2116                                 }
2117                         } else {
2118                                 $result .= substr( $invalue, $i, 1 );
2119                         }
2120                 }
2121                 // reverse the transform that we made for reversability reasons.
2122                 return strtr( $result, array( "&#x0" => "&#x" ) );
2123         }
2124
2125         function noCreatePermission() {
2126                 global $wgOut;
2127                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
2128                 $wgOut->addWikiText( wfMsg( 'nocreatetext' ) );
2129         }
2130
2131         /**
2132          * If there are rows in the deletion log for this page, show them,
2133          * along with a nice little note for the user
2134          *
2135          * @param OutputPage $out
2136          */
2137         private function showDeletionLog( $out ) {
2138                 $title = $this->mTitle;
2139                 $reader = new LogReader(
2140                         new FauxRequest(
2141                                 array(
2142                                         'page' => $title->getPrefixedText(),
2143                                         'type' => 'delete',
2144                                         )
2145                         )
2146                 );
2147                 if( $reader->hasRows() ) {
2148                         $out->addHtml( '<div id="mw-recreate-deleted-warn">' );
2149                         $out->addWikiText( wfMsg( 'recreate-deleted-warn' ) );
2150                         $viewer = new LogViewer( $reader );
2151                         $viewer->showList( $out );
2152                         $out->addHtml( '</div>' );
2153                 }
2154         }
2155
2156         /**
2157          * Attempt submission
2158          * @return bool false if output is done, true if the rest of the form should be displayed
2159          */
2160         function attemptSave() {
2161                 global $wgUser, $wgOut, $wgTitle, $wgRequest;
2162
2163                 $resultDetails = false;
2164                 $value = $this->internalAttemptSave( $resultDetails, $wgUser->isAllowed('bot') && $wgRequest->getBool('bot', true) );
2165
2166                 if( $value == self::AS_SUCCESS_UPDATE || $value == self::AS_SUCCESS_NEW_ARTICLE ) {
2167                         $this->didSave = true;
2168                 }
2169
2170                 switch ($value)
2171                 {
2172                         case self::AS_HOOK_ERROR_EXPECTED:
2173                         case self::AS_CONTENT_TOO_BIG:
2174                         case self::AS_ARTICLE_WAS_DELETED:
2175                         case self::AS_CONFLICT_DETECTED:
2176                         case self::AS_SUMMARY_NEEDED:
2177                         case self::AS_TEXTBOX_EMPTY:
2178                         case self::AS_MAX_ARTICLE_SIZE_EXCEDED:
2179                         case self::AS_END:
2180                                 return true;
2181
2182                         case self::AS_HOOK_ERROR:
2183                         case self::AS_FILTERING:
2184                         case self::AS_SUCCESS_NEW_ARTICLE:
2185                         case self::AS_SUCCESS_UPDATE:
2186                                 return false;
2187
2188                         case self::AS_SPAM_ERROR:
2189                                 $this->spamPage ( $resultDetails['spam'] );
2190                                 return false;
2191
2192                         case self::AS_BLOCKED_PAGE_FOR_USER:
2193                                 $this->blockedPage();
2194                                 return false;
2195
2196                         case self::AS_READ_ONLY_PAGE_ANON:
2197                                 $this->userNotLoggedInPage();
2198                                 return false;
2199
2200                         case self::AS_READ_ONLY_PAGE_LOGGED:
2201                         case self::AS_READ_ONLY_PAGE:
2202                                 $wgOut->readOnlyPage();
2203                                 return false;
2204
2205                         case self::AS_RATE_LIMITED:
2206                                 $wgOut->rateLimited();
2207                                 return false;
2208
2209                         case self::AS_NO_CREATE_PERMISSION;
2210                                 $this->noCreatePermission();
2211                                 return;
2212
2213                         case self::AS_BLANK_ARTICLE:
2214                                 $wgOut->redirect( $wgTitle->getFullURL() );
2215                                 return false;
2216                 }
2217         }
2218 }