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                 wfProfileIn( __METHOD__ );
 342                 wfDebug( __METHOD__.": enter\n" );
 343
 344                 // this is not an article
 345                 $wgOut->setArticleFlag(false);
 346
 347                 $this->importFormData( $wgRequest );
 348                 $this->firsttime = false;
 349
 350                 if( $this->live ) {
 351                         $this->livePreview();
 352                         wfProfileOut( __METHOD__ );
 353                         return;
 354                 }
 355
 356                 if( wfReadOnly() ) {
 357                         $wgOut->readOnlyPage( $this->getContent() );
 358                         wfProfileOut( __METHOD__ );
 359                         return;
 360                 }
 361
 362                 $permErrors = $this->mTitle->getUserPermissionsErrors('edit', $wgUser);
 363                 if( !$this->mTitle->exists() ) {
 364                         # We can't use array_diff here, because that considers ANY TWO
 365                         # ARRAYS TO BE EQUAL.  Thanks, PHP.
 366                         $createErrors = $this->mTitle->getUserPermissionsErrors('create', $wgUser);
 367                         foreach( $createErrors as $error ) {
 368                                 # in_array() actually *does* work as expected.
 369                                 if( !in_array( $error, $permErrors ) ) {
 370                                         $permErrors[] = $error;
 371                                 }
 372                         }
 373                 }
 374
 375                 # Ignore some permissions errors.
 376                 $remove = array();
 377                 foreach( $permErrors as $error ) {
 378                         if ($this->preview || $this->diff &&
 379                                 ($error[0] == 'blockedtext' || $error[0] == 'autoblockedtext'))
 380                         {
 381                                 // Don't worry about blocks when previewing/diffing
 382                                 $remove[] = $error;
 383                         }
 384
 385                         if ($error[0] == 'readonlytext')
 386                         {
 387                                 if ($this->edit) {
 388                                         $this->formtype = 'preview';
 389                                 } elseif ($this->save || $this->preview || $this->diff) {
 390                                         $remove[] = $error;
 391                                 }
 392                         }
 393                 }
 394                 $permErrors = array_diff( $permErrors, $remove );
 395
 396                 if ( !empty($permErrors) ) {
 397                         wfDebug( __METHOD__.": User can't edit\n" );
 398                         $wgOut->readOnlyPage( $this->getContent(), true, $permErrors );
 399                         wfProfileOut( __METHOD__ );
 400                         return;
 401                 } else {
 402                         if ( $this->save ) {
 403                                 $this->formtype = 'save';
 404                         } else if ( $this->preview ) {
 405                                 $this->formtype = 'preview';
 406                         } else if ( $this->diff ) {
 407                                 $this->formtype = 'diff';
 408                         } else { # First time through
 409                                 $this->firsttime = true;
 410                                 if( $this->previewOnOpen() ) {
 411                                         $this->formtype = 'preview';
 412                                 } else {
 413                                         $this->extractMetaDataFromArticle () ;
 414                                         $this->formtype = 'initial';
 415                                 }
 416                         }
 417                 }
 418
 419                 wfProfileIn( __METHOD__."-business-end" );
 420
 421                 $this->isConflict = false;
 422                 // css / js subpages of user pages get a special treatment
 423                 $this->isCssJsSubpage      = $this->mTitle->isCssJsSubpage();
 424                 $this->isValidCssJsSubpage = $this->mTitle->isValidCssJsSubpage();
 425
 426                 /* Notice that we can't use isDeleted, because it returns true if article is ever deleted
 427                  * no matter it's current state
 428                  */
 429                 $this->deletedSinceEdit = false;
 430                 if ( $this->edittime != '' ) {
 431                         /* Note that we rely on logging table, which hasn't been always there,
 432                          * but that doesn't matter, because this only applies to brand new
 433                          * deletes. This is done on every preview and save request. Move it further down
 434                          * to only perform it on saves
 435                          */
 436                         if ( $this->mTitle->isDeleted() ) {
 437                                 $this->lastDelete = $this->getLastDelete();
 438                                 if ( !is_null($this->lastDelete) ) {
 439                                         $deletetime = $this->lastDelete->log_timestamp;
 440                                         if ( ($deletetime - $this->starttime) > 0 ) {
 441                                                 $this->deletedSinceEdit = true;
 442                                         }
 443                                 }
 444                         }
 445                 }
 446
 447                 # Show applicable editing introductions
 448                 if( $this->formtype == 'initial' || $this->firsttime )
 449                         $this->showIntro();
 450
 451                 if( $this->mTitle->isTalkPage() ) {
 452                         $wgOut->addWikiText( wfMsg( 'talkpagetext' ) );
 453                 }
 454
 455                 # Attempt submission here.  This will check for edit conflicts,
 456                 # and redundantly check for locked database, blocked IPs, etc.
 457                 # that edit() already checked just in case someone tries to sneak
 458                 # in the back door with a hand-edited submission URL.
 459
 460                 if ( 'save' == $this->formtype ) {
 461                         if ( !$this->attemptSave() ) {
 462                                 wfProfileOut( __METHOD__."-business-end" );
 463                                 wfProfileOut( __METHOD__ );
 464                                 return;
 465                         }
 466                 }
 467
 468                 # First time through: get contents, set time for conflict
 469                 # checking, etc.
 470                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 471                         if ($this->initialiseForm() === false) {
 472                                 $this->noSuchSectionPage();
 473                                 wfProfileOut( __METHOD__."-business-end" );
 474                                 wfProfileOut( __METHOD__ );
 475                                 return;
 476                         }
 477                         if( !$this->mTitle->getArticleId() )
 478                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 479                 }
 480
 481                 $this->showEditForm();
 482                 wfProfileOut( __METHOD__."-business-end" );
 483                 wfProfileOut( __METHOD__ );
 484         }
 485
 486         /**
 487          * Should we show a preview when the edit form is first shown?
 488          *
 489          * @return bool
 490          */
 491         private function previewOnOpen() {
 492                 global $wgRequest, $wgUser;
 493                 if( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 494                         // Explicit override from request
 495                         return true;
 496                 } elseif( $wgRequest->getVal( 'preview' ) == 'no' ) {
 497                         // Explicit override from request
 498                         return false;
 499                 } elseif( $this->section == 'new' ) {
 500                         // Nothing *to* preview for new sections
 501                         return false;
 502                 } elseif( ( $wgRequest->getVal( 'preload' ) !== '' || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 503                         // Standard preference behaviour
 504                         return true;
 505                 } elseif( !$this->mTitle->exists() && $this->mTitle->getNamespace() == NS_CATEGORY ) {
 506                         // Categories are special
 507                         return true;
 508                 } else {
 509                         return false;
 510                 }
 511         }
 512
 513         /**
 514          * @todo document
 515          * @param $request
 516          */
 517         function importFormData( &$request ) {
 518                 global $wgLang, $wgUser;
 519                 $fname = 'EditPage::importFormData';
 520                 wfProfileIn( $fname );
 521
 522                 if( $request->wasPosted() ) {
 523                         # These fields need to be checked for encoding.
 524                         # Also remove trailing whitespace, but don't remove _initial_
 525                         # whitespace from the text boxes. This may be significant formatting.
 526                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 527                         $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
 528                         $this->mMetaData = rtrim( $request->getText( 'metadata'   ) );
 529                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 530                         $this->summary   = $wgLang->truncate( $request->getText( 'wpSummary'  ), 250 );
 531
 532                         $this->edittime = $request->getVal( 'wpEdittime' );
 533                         $this->starttime = $request->getVal( 'wpStarttime' );
 534
 535                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 536
 537                         if( is_null( $this->edittime ) ) {
 538                                 # If the form is incomplete, force to preview.
 539                                 wfDebug( "$fname: Form data appears to be incomplete\n" );
 540                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 541                                 $this->preview  = true;
 542                         } else {
 543                                 /* Fallback for live preview */
 544                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 545                                 $this->diff = $request->getCheck( 'wpDiff' );
 546
 547                                 // Remember whether a save was requested, so we can indicate
 548                                 // if we forced preview due to session failure.
 549                                 $this->mTriedSave = !$this->preview;
 550
 551                                 if ( $this->tokenOk( $request ) ) {
 552                                         # Some browsers will not report any submit button
 553                                         # if the user hits enter in the comment box.
 554                                         # The unmarked state will be assumed to be a save,
 555                                         # if the form seems otherwise complete.
 556                                         wfDebug( "$fname: Passed token check.\n" );
 557                                 } else if ( $this->diff ) {
 558                                         # Failed token check, but only requested "Show Changes".
 559                                         wfDebug( "$fname: Failed token check; Show Changes requested.\n" );
 560                                 } else {
 561                                         # Page might be a hack attempt posted from
 562                                         # an external site. Preview instead of saving.
 563                                         wfDebug( "$fname: Failed token check; forcing preview\n" );
 564                                         $this->preview = true;
 565                                 }
 566                         }
 567                         $this->save    = ! ( $this->preview OR $this->diff );
 568                         if( !preg_match( '/^\d{14}$/', $this->edittime )) {
 569                                 $this->edittime = null;
 570                         }
 571
 572                         if( !preg_match( '/^\d{14}$/', $this->starttime )) {
 573                                 $this->starttime = null;
 574                         }
 575
 576                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 577
 578                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 579                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 580
 581                         # Don't force edit summaries when a user is editing their own user or talk page
 582                         if( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) && $this->mTitle->getText() == $wgUser->getName() ) {
 583                                 $this->allowBlankSummary = true;
 584                         } else {
 585                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' );
 586                         }
 587
 588                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 589                 } else {
 590                         # Not a posted form? Start with nothing.
 591                         wfDebug( "$fname: Not a posted form.\n" );
 592                         $this->textbox1  = '';
 593                         $this->textbox2  = '';
 594                         $this->mMetaData = '';
 595                         $this->summary   = '';
 596                         $this->edittime  = '';
 597                         $this->starttime = wfTimestampNow();
 598                         $this->edit      = false;
 599                         $this->preview   = false;
 600                         $this->save      = false;
 601                         $this->diff      = false;
 602                         $this->minoredit = false;
 603                         $this->watchthis = false;
 604                         $this->recreate  = false;
 605                 }
 606
 607                 $this->oldid = $request->getInt( 'oldid' );
 608
 609                 # Section edit can come from either the form or a link
 610                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 611
 612                 $this->live = $request->getCheck( 'live' );
 613                 $this->editintro = $request->getText( 'editintro' );
 614
 615                 wfProfileOut( $fname );
 616         }
 617
 618         /**
 619          * Make sure the form isn't faking a user's credentials.
 620          *
 621          * @param $request WebRequest
 622          * @return bool
 623          * @private
 624          */
 625         function tokenOk( &$request ) {
 626                 global $wgUser;
 627                 $token = $request->getVal( 'wpEditToken' );
 628                 $this->mTokenOk = $wgUser->matchEditToken( $token );
 629                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
 630                 return $this->mTokenOk;
 631         }
 632
 633         /**
 634          * Show all applicable editing introductions
 635          */
 636         private function showIntro() {
 637                 global $wgOut, $wgUser;
 638                 if( $this->suppressIntro )
 639                         return;
 640
 641                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exists
 642                 if( $this->mTitle->getNamespace() == NS_USER || $this->mTitle->getNamespace() == NS_USER_TALK ) {
 643                         $parts = explode( '/', $this->mTitle->getText(), 2 );
 644                         $username = $parts[0];
 645                         $id = User::idFromName( $username );
 646                         $ip = User::isIP( $username );
 647
 648                         if ( $id == 0 && !$ip ) {
 649                                 $wgOut->addWikiText( '<div class="mw-userpage-userdoesnotexist error">' . wfMsg( 'userpage-userdoesnotexist', $username ) . '</div>' );
 650                         }
 651                 }
 652
 653                 if( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
 654                         if( $wgUser->isLoggedIn() ) {
 655                                 $wgOut->addWikiText( '<div class="mw-newarticletext">' . wfMsg( 'newarticletext' ) . '</div>' );
 656                         } else {
 657                                 $wgOut->addWikiText( '<div class="mw-newarticletextanon">' . wfMsg( 'newarticletextanon' ) . '</div>' );
 658                         }
 659                         $this->showDeletionLog( $wgOut );
 660                 }
 661         }
 662
 663         /**
 664          * Attempt to show a custom editing introduction, if supplied
 665          *
 666          * @return bool
 667          */
 668         private function showCustomIntro() {
 669                 if( $this->editintro ) {
 670                         $title = Title::newFromText( $this->editintro );
 671                         if( $title instanceof Title && $title->exists() && $title->userCanRead() ) {
 672                                 global $wgOut;
 673                                 $revision = Revision::newFromTitle( $title );
 674                                 $wgOut->addSecondaryWikiText( $revision->getText() );
 675                                 return true;
 676                         } else {
 677                                 return false;
 678                         }
 679                 } else {
 680                         return false;
 681                 }
 682         }
 683
 684         /**
 685          * Attempt submission (no UI)
 686          * @return one of the constants describing the result
 687          */
 688         function internalAttemptSave( &$result, $bot = false ) {
 689                 global $wgSpamRegex, $wgFilterCallback, $wgUser, $wgOut, $wgParser;
 690                 global $wgMaxArticleSize, $wgTitle;
 691
 692                 $fname = 'EditPage::attemptSave';
 693                 wfProfileIn( $fname );
 694                 wfProfileIn( "$fname-checks" );
 695
 696                 if( !wfRunHooks( 'EditPage::attemptSave', array( &$this ) ) )
 697                 {
 698                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving" );
 699                         return self::AS_HOOK_ERROR;
 700                 }
 701
 702                 # Reintegrate metadata
 703                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 704                 $this->mMetaData = '' ;
 705
 706                 # Check for spam
 707                 $matches = array();
 708                 if ( $wgSpamRegex && preg_match( $wgSpamRegex, $this->textbox1, $matches ) ) {
 709                         $result['spam'] = $matches[0];
 710                         wfProfileOut( "$fname-checks" );
 711                         wfProfileOut( $fname );
 712                         return self::AS_SPAM_ERROR;
 713                 }
 714                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section ) ) {
 715                         # Error messages or other handling should be performed by the filter function
 716                         wfProfileOut( "$fname-checks" );
 717                         wfProfileOut( $fname );
 718                         return self::AS_FILTERING;
 719                 }
 720                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError ) ) ) {
 721                         # Error messages etc. could be handled within the hook...
 722                         wfProfileOut( "$fname-checks" );
 723                         wfProfileOut( $fname );
 724                         return self::AS_HOOK_ERROR;
 725                 } elseif( $this->hookError != '' ) {
 726                         # ...or the hook could be expecting us to produce an error
 727                         wfProfileOut( "$fname-checks" );
 728                         wfProfileOut( $fname );
 729                         return self::AS_HOOK_ERROR_EXPECTED;
 730                 }
 731                 if ( $wgUser->isBlockedFrom( $wgTitle, false ) ) {
 732                         # Check block state against master, thus 'false'.
 733                         wfProfileOut( "$fname-checks" );
 734                         wfProfileOut( $fname );
 735                         return self::AS_BLOCKED_PAGE_FOR_USER;
 736                 }
 737                 $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 738                 if ( $this->kblength > $wgMaxArticleSize ) {
 739                         // Error will be displayed by showEditForm()
 740                         $this->tooBig = true;
 741                         wfProfileOut( "$fname-checks" );
 742                         wfProfileOut( $fname );
 743                         return self::AS_CONTENT_TOO_BIG;
 744                 }
 745
 746                 if ( !$wgUser->isAllowed('edit') ) {
 747                         if ( $wgUser->isAnon() ) {
 748                                 wfProfileOut( "$fname-checks" );
 749                                 wfProfileOut( $fname );
 750                                 return self::AS_READ_ONLY_PAGE_ANON;
 751                         }
 752                         else {
 753                                 wfProfileOut( "$fname-checks" );
 754                                 wfProfileOut( $fname );
 755                                 return self::AS_READ_ONLY_PAGE_LOGGED;
 756                         }
 757                 }
 758
 759                 if ( wfReadOnly() ) {
 760                         wfProfileOut( "$fname-checks" );
 761                         wfProfileOut( $fname );
 762                         return self::AS_READ_ONLY_PAGE;
 763                 }
 764                 if ( $wgUser->pingLimiter() ) {
 765                         wfProfileOut( "$fname-checks" );
 766                         wfProfileOut( $fname );
 767                         return self::AS_RATE_LIMITED;
 768                 }
 769
 770                 # If the article has been deleted while editing, don't save it without
 771                 # confirmation
 772                 if ( $this->deletedSinceEdit && !$this->recreate ) {
 773                         wfProfileOut( "$fname-checks" );
 774                         wfProfileOut( $fname );
 775                         return self::AS_ARTICLE_WAS_DELETED;
 776                 }
 777
 778                 wfProfileOut( "$fname-checks" );
 779
 780                 # If article is new, insert it.
 781                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 782                 if ( 0 == $aid ) {
 783
 784                         // Late check for create permission, just in case *PARANOIA*
 785                         if ( !$this->mTitle->userCan( 'create' ) ) {
 786                                 wfDebug( "$fname: no create permission\n" );
 787                                 wfProfileOut( $fname );
 788                                 return self::AS_NO_CREATE_PERMISSION;
 789                         }
 790
 791                         # Don't save a new article if it's blank.
 792                         if ( ( '' == $this->textbox1 ) ) {
 793                                         wfProfileOut( $fname );
 794                                         return self::AS_BLANK_ARTICLE;
 795                         }
 796
 797                         // Run post-section-merge edit filter
 798                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError ) ) ) {
 799                                 # Error messages etc. could be handled within the hook...
 800                                 wfProfileOut( $fname );
 801                                 return false;
 802                         }
 803
 804                         $isComment = ( $this->section == 'new' );
 805
 806                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 807                                 $this->minoredit, $this->watchthis, false, $isComment, $bot);
 808
 809                         wfProfileOut( $fname );
 810                         return self::AS_SUCCESS_NEW_ARTICLE;
 811                 }
 812
 813                 # Article exists. Check for edit conflict.
 814
 815                 $this->mArticle->clear(); # Force reload of dates, etc.
 816                 $this->mArticle->forUpdate( true ); # Lock the article
 817
 818                 wfDebug("timestamp: {$this->mArticle->getTimestamp()}, edittime: {$this->edittime}\n");
 819
 820                 if( $this->mArticle->getTimestamp() != $this->edittime ) {
 821                         $this->isConflict = true;
 822                         if( $this->section == 'new' ) {
 823                                 if( $this->mArticle->getUserText() == $wgUser->getName() &&
 824                                         $this->mArticle->getComment() == $this->summary ) {
 825                                         // Probably a duplicate submission of a new comment.
 826                                         // This can happen when squid resends a request after
 827                                         // a timeout but the first one actually went through.
 828                                         wfDebug( "EditPage::editForm duplicate new section submission; trigger edit conflict!\n" );
 829                                 } else {
 830                                         // New comment; suppress conflict.
 831                                         $this->isConflict = false;
 832                                         wfDebug( "EditPage::editForm conflict suppressed; new section\n" );
 833                                 }
 834                         }
 835                 }
 836                 $userid = $wgUser->getID();
 837
 838                 if ( $this->isConflict) {
 839                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 840                                 $this->mArticle->getTimestamp() . "')\n" );
 841                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime);
 842                 }
 843                 else {
 844                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 845                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary);
 846                 }
 847                 if( is_null( $text ) ) {
 848                         wfDebug( "EditPage::editForm activating conflict; section replace failed.\n" );
 849                         $this->isConflict = true;
 850                         $text = $this->textbox1;
 851                 }
 852
 853                 # Suppress edit conflict with self, except for section edits where merging is required.
 854                 if ( ( $this->section == '' ) && ( 0 != $userid ) && ( $this->mArticle->getUser() == $userid ) ) {
 855                         wfDebug( "EditPage::editForm Suppressing edit conflict, same user.\n" );
 856                         $this->isConflict = false;
 857                 } else {
 858                         # switch from section editing to normal editing in edit conflict
 859                         if($this->isConflict) {
 860                                 # Attempt merge
 861                                 if( $this->mergeChangesInto( $text ) ){
 862                                         // Successful merge! Maybe we should tell the user the good news?
 863                                         $this->isConflict = false;
 864                                         wfDebug( "EditPage::editForm Suppressing edit conflict, successful merge.\n" );
 865                                 } else {
 866                                         $this->section = '';
 867                                         $this->textbox1 = $text;
 868                                         wfDebug( "EditPage::editForm Keeping edit conflict, failed merge.\n" );
 869                                 }
 870                         }
 871                 }
 872
 873                 if ( $this->isConflict ) {
 874                         wfProfileOut( $fname );
 875                         return self::AS_CONFLICT_DETECTED;
 876                 }
 877
 878                 $oldtext = $this->mArticle->getContent();
 879
 880                 // Run post-section-merge edit filter
 881                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$this->hookError ) ) ) {
 882                         # Error messages etc. could be handled within the hook...
 883                         wfProfileOut( $fname );
 884                         return false;
 885                 }
 886
 887                 # Handle the user preference to force summaries here, but not for null edits
 888                 if( $this->section != 'new' && !$this->allowBlankSummary && $wgUser->getOption( 'forceeditsummary')
 889                         &&  0 != strcmp($oldtext, $text) && !Article::getRedirectAutosummary( $text )) {
 890                         if( md5( $this->summary ) == $this->autoSumm ) {
 891                                 $this->missingSummary = true;
 892                                 wfProfileOut( $fname );
 893                                 return self::AS_SUMMARY_NEEDED;
 894                         }
 895                 }
 896
 897                 #And a similar thing for new sections
 898                 if( $this->section == 'new' && !$this->allowBlankSummary && $wgUser->getOption( 'forceeditsummary' ) ) {
 899                         if (trim($this->summary) == '') {
 900                                 $this->missingSummary = true;
 901                                 wfProfileOut( $fname );
 902                                 return self::AS_SUMMARY_NEEDED;
 903                         }
 904                 }
 905
 906                 # All's well
 907                 wfProfileIn( "$fname-sectionanchor" );
 908                 $sectionanchor = '';
 909                 if( $this->section == 'new' ) {
 910                         if ( $this->textbox1 == '' ) {
 911                                 $this->missingComment = true;
 912                                 return self::AS_TEXTBOX_EMPTY;
 913                         }
 914                         if( $this->summary != '' ) {
 915                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $this->summary );
 916                                 # This is a new section, so create a link to the new section
 917                                 # in the revision summary.
 918                                 $cleanSummary = $wgParser->stripSectionName( $this->summary );
 919                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
 920                         }
 921                 } elseif( $this->section != '' ) {
 922                         # Try to get a section anchor from the section source, redirect to edited section if header found
 923                         # XXX: might be better to integrate this into Article::replaceSection
 924                         # for duplicate heading checking and maybe parsing
 925                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 926                         # we can't deal with anchors, includes, html etc in the header for now,
 927                         # headline would need to be parsed to improve this
 928                         if($hasmatch and strlen($matches[2]) > 0) {
 929                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $matches[2] );
 930                         }
 931                 }
 932                 wfProfileOut( "$fname-sectionanchor" );
 933
 934                 // Save errors may fall down to the edit form, but we've now
 935                 // merged the section into full text. Clear the section field
 936                 // so that later submission of conflict forms won't try to
 937                 // replace that into a duplicated mess.
 938                 $this->textbox1 = $text;
 939                 $this->section = '';
 940
 941                 // Check for length errors again now that the section is merged in
 942                 $this->kblength = (int)(strlen( $text ) / 1024);
 943                 if ( $this->kblength > $wgMaxArticleSize ) {
 944                         $this->tooBig = true;
 945                         wfProfileOut( $fname );
 946                         return self::AS_MAX_ARTICLE_SIZE_EXCEDED;
 947                 }
 948
 949                 # update the article here
 950                 if( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
 951                         $this->watchthis, $bot, $sectionanchor ) ) {
 952                         wfProfileOut( $fname );
 953                         return self::AS_SUCCESS_UPDATE;
 954                 } else {
 955                         $this->isConflict = true;
 956                 }
 957                 wfProfileOut( $fname );
 958                 return self::AS_END;
 959         }
 960
 961         /**
 962          * Initialise form fields in the object
 963          * Called on the first invocation, e.g. when a user clicks an edit link
 964          */
 965         function initialiseForm() {
 966                 $this->edittime = $this->mArticle->getTimestamp();
 967                 $this->summary = '';
 968                 $this->textbox1 = $this->getContent(false);
 969                 if ($this->textbox1 === false) return false;
 970
 971                 if ( !$this->mArticle->exists() && $this->mTitle->getNamespace() == NS_MEDIAWIKI )
 972                         $this->textbox1 = wfMsgWeirdKey( $this->mTitle->getText() );
 973                 wfProxyCheck();
 974                 return true;
 975         }
 976
 977         /**
 978          * Send the edit form and related headers to $wgOut
 979          * @param $formCallback Optional callable that takes an OutputPage
 980          *                      parameter; will be called during form output
 981          *                      near the top, for captchas and the like.
 982          */
 983         function showEditForm( $formCallback=null ) {
 984                 global $wgOut, $wgUser, $wgLang, $wgContLang, $wgMaxArticleSize, $wgTitle;
 985
 986                 $fname = 'EditPage::showEditForm';
 987                 wfProfileIn( $fname );
 988
 989                 $sk = $wgUser->getSkin();
 990
 991                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) ) ;
 992
 993                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 994
 995                 # Enabled article-related sidebar, toplinks, etc.
 996                 $wgOut->setArticleRelated( true );
 997
 998                 if ( $this->formtype == 'preview' ) {
 999                         $wgOut->setPageTitleActionText( wfMsg( 'preview' ) );
1000                 }
1001
1002                 if ( $this->isConflict ) {
1003                         $s = wfMsg( 'editconflict', $wgTitle->getPrefixedText() );
1004                         $wgOut->setPageTitle( $s );
1005                         $wgOut->addWikiText( wfMsg( 'explainconflict' ) );
1006
1007                         $this->textbox2 = $this->textbox1;
1008                         $this->textbox1 = $this->getContent();
1009                         $this->edittime = $this->mArticle->getTimestamp();
1010                 } else {
1011                         if( $this->section != '' ) {
1012                                 if( $this->section == 'new' ) {
1013                                         $s = wfMsg('editingcomment', $wgTitle->getPrefixedText() );
1014                                 } else {
1015                                         $s = wfMsg('editingsection', $wgTitle->getPrefixedText() );
1016                                         $matches = array();
1017                                         if( !$this->summary && !$this->preview && !$this->diff ) {
1018                                                 preg_match( "/^(=+)(.+)\\1/mi",
1019                                                         $this->textbox1,
1020                                                         $matches );
1021                                                 if( !empty( $matches[2] ) ) {
1022                                                         global $wgParser;
1023                                                         $this->summary = "/* " .
1024                                                                 $wgParser->stripSectionName(trim($matches[2])) .
1025                                                                 " */ ";
1026                                                 }
1027                                         }
1028                                 }
1029                         } else {
1030                                 $s = wfMsg( 'editing', $wgTitle->getPrefixedText() );
1031                         }
1032                         $wgOut->setPageTitle( $s );
1033
1034                         if ( $this->missingComment ) {
1035                                 $wgOut->addWikiText( '<div id="mw-missingcommenttext">' . wfMsg( 'missingcommenttext' ) . '</div>' );
1036                         }
1037
1038                         if( $this->missingSummary && $this->section != 'new' ) {
1039                                 $wgOut->addWikiText( '<div id="mw-missingsummary">' . wfMsg( 'missingsummary' ) . '</div>' );
1040                         }
1041
1042                         if( $this->missingSummary && $this->section == 'new' ) {
1043                                 $wgOut->addWikiText( '<div id="mw-missingcommentheader">' . wfMsg( 'missingcommentheader' ) . '</div>' );
1044                         }
1045
1046                         if( $this->hookError !== '' ) {
1047                                 $wgOut->addWikiText( $this->hookError );
1048                         }
1049
1050                         if ( !$this->checkUnicodeCompliantBrowser() ) {
1051                                 $wgOut->addWikiText( wfMsg( 'nonunicodebrowser') );
1052                         }
1053                         if ( isset( $this->mArticle ) && isset( $this->mArticle->mRevision ) ) {
1054                         // Let sysop know that this will make private content public if saved
1055
1056                                 if( !$this->mArticle->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1057                                         $wgOut->addWikiText( wfMsg( 'rev-deleted-text-permission' ) );
1058                                 } else if( $this->mArticle->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1059                                         $wgOut->addWikiText( wfMsg( 'rev-deleted-text-view' ) );
1060                                 }
1061
1062                                 if( !$this->mArticle->mRevision->isCurrent() ) {
1063                                         $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
1064                                         $wgOut->addWikiText( wfMsg( 'editingold' ) );
1065                                 }
1066                         }
1067                 }
1068
1069                 if( wfReadOnly() ) {
1070                         $wgOut->addHTML( '<div id="mw-read-only-warning">'.wfMsgWikiHTML( 'readonlywarning' ).'</div>' );
1071                 } elseif( $wgUser->isAnon() && $this->formtype != 'preview' ) {
1072                         $wgOut->addHTML( '<div id="mw-anon-edit-warning">'.wfMsgWikiHTML( 'anoneditwarning' ).'</div>' );
1073                 } else {
1074                         if( $this->isCssJsSubpage && $this->formtype != 'preview' ) {
1075                                 # Check the skin exists
1076                                 if( $this->isValidCssJsSubpage ) {
1077                                         $wgOut->addWikiText( wfMsg( 'usercssjsyoucanpreview' ) );
1078                                 } else {
1079                                         $wgOut->addWikiText( wfMsg( 'userinvalidcssjstitle', $wgTitle->getSkinFromCssJsSubpage() ) );
1080                                 }
1081                         }
1082                 }
1083
1084                 if( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1085                         # Show a warning if editing an interface message
1086                         $wgOut->addWikiText( wfMsg( 'editinginterface' ) );
1087                 } elseif( $this->mTitle->isProtected( 'edit' ) ) {
1088                         # Is the title semi-protected?
1089                         if( $this->mTitle->isSemiProtected() ) {
1090                                 $notice = wfMsg( 'semiprotectedpagewarning' );
1091                                 if( wfEmptyMsg( 'semiprotectedpagewarning', $notice ) || $notice == '-' )
1092                                         $notice = '';
1093                         } else {
1094                                 # Then it must be protected based on static groups (regular)
1095                                 $notice = wfMsg( 'protectedpagewarning' );
1096                         }
1097                         $wgOut->addWikiText( $notice );
1098                 }
1099                 if ( $this->mTitle->isCascadeProtected() ) {
1100                         # Is this page under cascading protection from some source pages?
1101                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
1102                         if ( count($cascadeSources) > 0 ) {
1103                                 # Explain, and list the titles responsible
1104                                 $notice = wfMsgExt( 'cascadeprotectedwarning', array('parsemag'), count($cascadeSources) ) . "\n";
1105                                 foreach( $cascadeSources as $page ) {
1106                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
1107                                 }
1108                         }
1109                         $wgOut->addWikiText( $notice );
1110                 }
1111                 if( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) != array() ){
1112                         $wgOut->addWikiText( wfMsg( 'titleprotectedwarning' ) );
1113                 }
1114
1115                 if ( $this->kblength === false ) {
1116                         $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
1117                 }
1118                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
1119                         $wgOut->addWikiText( wfMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgMaxArticleSize ) );
1120                 } elseif( $this->kblength > 29 ) {
1121                         $wgOut->addWikiText( wfMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) ) );
1122                 }
1123
1124                 #need to parse the preview early so that we know which templates are used,
1125                 #otherwise users with "show preview after edit box" will get a blank list
1126                 if ( $this->formtype == 'preview' ) {
1127                         $previewOutput = $this->getPreviewText();
1128                 }
1129
1130                 $rows = $wgUser->getIntOption( 'rows' );
1131                 $cols = $wgUser->getIntOption( 'cols' );
1132
1133                 $ew = $wgUser->getOption( 'editwidth' );
1134                 if ( $ew ) $ew = " style=\"width:100%\"";
1135                 else $ew = '';
1136
1137                 $q = 'action=submit';
1138                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
1139                 $action = $wgTitle->escapeLocalURL( $q );
1140
1141                 $summary = wfMsg('summary');
1142                 $subject = wfMsg('subject');
1143
1144                 $cancel = $sk->makeKnownLink( $wgTitle->getPrefixedText(),
1145                                 wfMsgExt('cancel', array('parseinline')) );
1146                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ));
1147                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
1148                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
1149                         htmlspecialchars( wfMsg( 'newwindow' ) );
1150
1151                 global $wgRightsText;
1152                 $copywarn = "<div id=\"editpage-copywarn\">\n" .
1153                         wfMsg( $wgRightsText ? 'copyrightwarning' : 'copyrightwarning2',
1154                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
1155                                 $wgRightsText ) . "\n</div>";
1156
1157                 if( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
1158                         # prepare toolbar for edit buttons
1159                         $toolbar = $this->getEditToolbar();
1160                 } else {
1161                         $toolbar = '';
1162                 }
1163
1164                 // activate checkboxes if user wants them to be always active
1165                 if( !$this->preview && !$this->diff ) {
1166                         # Sort out the "watch" checkbox
1167                         if( $wgUser->getOption( 'watchdefault' ) ) {
1168                                 # Watch all edits
1169                                 $this->watchthis = true;
1170                         } elseif( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1171                                 # Watch creations
1172                                 $this->watchthis = true;
1173                         } elseif( $this->mTitle->userIsWatching() ) {
1174                                 # Already watched
1175                                 $this->watchthis = true;
1176                         }
1177
1178                         if( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
1179                 }
1180
1181                 $wgOut->addHTML( $this->editFormPageTop );
1182
1183                 if ( $wgUser->getOption( 'previewontop' ) ) {
1184
1185                         if ( 'preview' == $this->formtype ) {
1186                                 $this->showPreview( $previewOutput );
1187                         } else {
1188                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
1189                         }
1190
1191                         if ( 'diff' == $this->formtype ) {
1192                                 $this->showDiff();
1193                         }
1194                 }
1195
1196
1197                 $wgOut->addHTML( $this->editFormTextTop );
1198
1199                 # if this is a comment, show a subject line at the top, which is also the edit summary.
1200                 # Otherwise, show a summary field at the bottom
1201                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
1202                 if( $this->section == 'new' ) {
1203                         $commentsubject="<span id='wpSummaryLabel'><label for='wpSummary'>{$subject}:</label></span>\n<div class='editOptions'>\n<input tabindex='1' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
1204                         $editsummary = '';
1205                         $subjectpreview = $summarytext && $this->preview ? "<div class=\"mw-summary-preview\">".wfMsg('subject-preview').':'.$sk->commentBlock( $this->summary, $this->mTitle )."</div>\n" : '';
1206                         $summarypreview = '';
1207                 } else {
1208                         $commentsubject = '';
1209                         $editsummary="<span id='wpSummaryLabel'><label for='wpSummary'>{$summary}:</label></span>\n<div class='editOptions'>\n<input tabindex='2' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
1210                         $summarypreview = $summarytext && $this->preview ? "<div class=\"mw-summary-preview\">".wfMsg('summary-preview').':'.$sk->commentBlock( $this->summary, $this->mTitle )."</div>\n" : '';
1211                         $subjectpreview = '';
1212                 }
1213
1214                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
1215                 if( !$this->preview && !$this->diff ) {
1216                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
1217                 }
1218                 $templates = ($this->preview || $this->section != '') ? $this->mPreviewTemplates : $this->mArticle->getUsedTemplates();
1219                 $formattedtemplates = $sk->formatTemplates( $templates, $this->preview, $this->section != '');
1220
1221                 global $wgUseMetadataEdit ;
1222                 if ( $wgUseMetadataEdit ) {
1223                         $metadata = $this->mMetaData ;
1224                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
1225                         $top = wfMsgWikiHtml( 'metadata_help' );
1226                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
1227                 }
1228                 else $metadata = "" ;
1229
1230                 $hidden = '';
1231                 $recreate = '';
1232                 if ($this->deletedSinceEdit) {
1233                         if ( 'save' != $this->formtype ) {
1234                                 $wgOut->addWikiText( wfMsg('deletedwhileediting'));
1235                         } else {
1236                                 // Hide the toolbar and edit area, use can click preview to get it back
1237                                 // Add an confirmation checkbox and explanation.
1238                                 $toolbar = '';
1239                                 $hidden = 'type="hidden" style="display:none;"';
1240                                 $recreate = $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ));
1241                                 $recreate .=
1242                                         "<br /><input tabindex='1' type='checkbox' value='1' name='wpRecreate' id='wpRecreate' />".
1243                                         "<label for='wpRecreate' title='".wfMsg('tooltip-recreate')."'>". wfMsg('recreate')."</label>";
1244                         }
1245                 }
1246
1247                 $tabindex = 2;
1248
1249                 $checkboxes = self::getCheckboxes( $tabindex, $sk,
1250                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
1251
1252                 $checkboxhtml = implode( $checkboxes, "\n" );
1253
1254                 $buttons = $this->getEditButtons( $tabindex );
1255                 $buttonshtml = implode( $buttons, "\n" );
1256
1257                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
1258                         ? '' : Xml::hidden( 'safemode', '1' );
1259
1260                 $wgOut->addHTML( <<<END
1261 {$toolbar}
1262 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1263 END
1264 );
1265
1266                 if( is_callable( $formCallback ) ) {
1267                         call_user_func_array( $formCallback, array( &$wgOut ) );
1268                 }
1269
1270                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1271
1272                 // Put these up at the top to ensure they aren't lost on early form submission
1273                 $wgOut->addHTML( "
1274 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
1275 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
1276 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
1277 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
1278
1279                 $wgOut->addHTML( <<<END
1280 $recreate
1281 {$commentsubject}
1282 {$subjectpreview}
1283 {$this->editFormTextBeforeContent}
1284 <textarea tabindex='1' accesskey="," name="wpTextbox1" id="wpTextbox1" rows='{$rows}'
1285 cols='{$cols}'{$ew} $hidden>
1286 END
1287 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox1 ) ) .
1288 "
1289 </textarea>
1290                 " );
1291
1292                 $wgOut->addWikiText( $copywarn );
1293                 $wgOut->addHTML( $this->editFormTextAfterWarn );
1294                 $wgOut->addHTML( "
1295 {$metadata}
1296 {$editsummary}
1297 {$summarypreview}
1298 {$checkboxhtml}
1299 {$safemodehtml}
1300 ");
1301
1302                 $wgOut->addHTML(
1303 "<div class='editButtons'>
1304 {$buttonshtml}
1305         <span class='editHelp'>{$cancel} | {$edithelp}</span>
1306 </div><!-- editButtons -->
1307 </div><!-- editOptions -->");
1308
1309                 $wgOut->addHtml( '<div class="mw-editTools">' );
1310                 $wgOut->addWikiText( wfMsgForContent( 'edittools' ) );
1311                 $wgOut->addHtml( '</div>' );
1312
1313                 $wgOut->addHTML( $this->editFormTextAfterTools );
1314
1315                 $wgOut->addHTML( "
1316 <div class='templatesUsed'>
1317 {$formattedtemplates}
1318 </div>
1319 " );
1320
1321                 /**
1322                  * To make it harder for someone to slip a user a page
1323                  * which submits an edit form to the wiki without their
1324                  * knowledge, a random token is associated with the login
1325                  * session. If it's not passed back with the submission,
1326                  * we won't save the page, or render user JavaScript and
1327                  * CSS previews.
1328                  *
1329                  * For anon editors, who may not have a session, we just
1330                  * include the constant suffix to prevent editing from
1331                  * broken text-mangling proxies.
1332                  */
1333                 $token = htmlspecialchars( $wgUser->editToken() );
1334                 $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
1335
1336
1337                 # If a blank edit summary was previously provided, and the appropriate
1338                 # user preference is active, pass a hidden tag here. This will stop the
1339                 # user being bounced back more than once in the event that a summary
1340                 # is not required.
1341                 if( $this->missingSummary ) {
1342                         $wgOut->addHTML( "<input type=\"hidden\" name=\"wpIgnoreBlankSummary\" value=\"1\" />\n" );
1343                 }
1344
1345                 # For a bit more sophisticated detection of blank summaries, hash the
1346                 # automatic one and pass that in a hidden field.
1347                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1348                 $wgOut->addHtml( wfHidden( 'wpAutoSummary', $autosumm ) );
1349
1350                 if ( $this->isConflict ) {
1351                         $wgOut->addWikiText( '==' . wfMsg( "yourdiff" ) . '==' );
1352
1353                         $de = new DifferenceEngine( $this->mTitle );
1354                         $de->setText( $this->textbox2, $this->textbox1 );
1355                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1356
1357                         $wgOut->addWikiText( '==' . wfMsg( "yourtext" ) . '==' );
1358                         $wgOut->addHTML( "<textarea tabindex='6' id='wpTextbox2' name=\"wpTextbox2\" rows='{$rows}' cols='{$cols}'>"
1359                                 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox2 ) ) . "\n</textarea>" );
1360                 }
1361                 $wgOut->addHTML( $this->editFormTextBottom );
1362                 $wgOut->addHTML( "</form>\n" );
1363                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1364
1365                         if ( $this->formtype == 'preview') {
1366                                 $this->showPreview( $previewOutput );
1367                         } else {
1368                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
1369                         }
1370
1371                         if ( $this->formtype == 'diff') {
1372                                 $this->showDiff();
1373                         }
1374
1375                 }
1376
1377                 wfProfileOut( $fname );
1378         }
1379
1380         /**
1381          * Append preview output to $wgOut.
1382          * Includes category rendering if this is a category page.
1383          *
1384          * @param string $text The HTML to be output for the preview.
1385          */
1386         private function showPreview( $text ) {
1387                 global $wgOut;
1388
1389                 $wgOut->addHTML( '<div id="wikiPreview">' );
1390                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1391                         $this->mArticle->openShowCategory();
1392                 }
1393                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
1394                 $wgOut->addHTML( $text );
1395                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1396                         $this->mArticle->closeShowCategory();
1397                 }
1398                 $wgOut->addHTML( '</div>' );
1399         }
1400
1401         /**
1402          * Live Preview lets us fetch rendered preview page content and
1403          * add it to the page without refreshing the whole page.
1404          * If not supported by the browser it will fall through to the normal form
1405          * submission method.
1406          *
1407          * This function outputs a script tag to support live preview, and
1408          * returns an onclick handler which should be added to the attributes
1409          * of the preview button
1410          */
1411         function doLivePreviewScript() {
1412                 global $wgStylePath, $wgJsMimeType, $wgStyleVersion, $wgOut, $wgTitle;
1413                 $wgOut->addHTML( '<script type="'.$wgJsMimeType.'" src="' .
1414                         htmlspecialchars( "$wgStylePath/common/preview.js?$wgStyleVersion" ) .
1415                         '"></script>' . "\n" );
1416                 $liveAction = $wgTitle->getLocalUrl( 'action=submit&wpPreview=true&live=true' );
1417                 return "return !lpDoPreview(" .
1418                         "editform.wpTextbox1.value," .
1419                         '"' . $liveAction . '"' . ")";
1420         }
1421
1422         function getLastDelete() {
1423                 $dbr = wfGetDB( DB_SLAVE );
1424                 $fname = 'EditPage::getLastDelete';
1425                 $res = $dbr->select(
1426                         array( 'logging', 'user' ),
1427                         array( 'log_type',
1428                                'log_action',
1429                                'log_timestamp',
1430                                'log_user',
1431                                'log_namespace',
1432                                'log_title',
1433                                'log_comment',
1434                                'log_params',
1435                                'user_name', ),
1436                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1437                                'log_title' => $this->mTitle->getDBkey(),
1438                                'log_type' => 'delete',
1439                                'log_action' => 'delete',
1440                                'user_id=log_user' ),
1441                         $fname,
1442                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
1443
1444                 if($dbr->numRows($res) == 1) {
1445                         while ( $x = $dbr->fetchObject ( $res ) )
1446                                 $data = $x;
1447                         $dbr->freeResult ( $res ) ;
1448                 } else {
1449                         $data = null;
1450                 }
1451                 return $data;
1452         }
1453
1454         /**
1455          * @todo document
1456          */
1457         function getPreviewText() {
1458                 global $wgOut, $wgUser, $wgTitle, $wgParser;
1459
1460                 $fname = 'EditPage::getPreviewText';
1461                 wfProfileIn( $fname );
1462
1463                 if ( $this->mTriedSave && !$this->mTokenOk ) {
1464                         if ( $this->mTokenOkExceptSuffix ) {
1465                                 $note = wfMsg( 'token_suffix_mismatch' );
1466                         } else {
1467                                 $note = wfMsg( 'session_fail_preview' );
1468                         }
1469                 } else {
1470                         $note = wfMsg( 'previewnote' );
1471                 }
1472
1473                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1474                 $parserOptions->setEditSection( false );
1475
1476                 global $wgRawHtml;
1477                 if( $wgRawHtml && !$this->mTokenOk ) {
1478                         // Could be an offsite preview attempt. This is very unsafe if
1479                         // HTML is enabled, as it could be an attack.
1480                         return $wgOut->parse( "<div class='previewnote'>" .
1481                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1482                 }
1483
1484                 # don't parse user css/js, show message about preview
1485                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1486
1487                 if ( $this->isCssJsSubpage ) {
1488                         if(preg_match("/\\.css$/", $this->mTitle->getText() ) ) {
1489                                 $previewtext = wfMsg('usercsspreview');
1490                         } else if(preg_match("/\\.js$/", $this->mTitle->getText() ) ) {
1491                                 $previewtext = wfMsg('userjspreview');
1492                         }
1493                         $parserOptions->setTidy(true);
1494                         $parserOutput = $wgParser->parse( $previewtext , $this->mTitle, $parserOptions );
1495                         $wgOut->addHTML( $parserOutput->mText );
1496                         $previewHTML = '';
1497                 } else {
1498                         $toparse = $this->textbox1;
1499
1500                         # If we're adding a comment, we need to show the
1501                         # summary as the headline
1502                         if($this->section=="new" && $this->summary!="") {
1503                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1504                         }
1505
1506                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData ;
1507                         $parserOptions->setTidy(true);
1508                         $parserOptions->enableLimitReport();
1509                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ) ."\n\n",
1510                                         $this->mTitle, $parserOptions );
1511
1512                         $previewHTML = $parserOutput->getText();
1513                         $wgOut->addParserOutputNoText( $parserOutput );
1514
1515                         # ParserOutput might have altered the page title, so reset it
1516                         $wgOut->setPageTitle( wfMsg( 'editing', $wgTitle->getPrefixedText() ) );
1517
1518                         foreach ( $parserOutput->getTemplates() as $ns => $template)
1519                                 foreach ( array_keys( $template ) as $dbk)
1520                                         $this->mPreviewTemplates[] = Title::makeTitle($ns, $dbk);
1521
1522                         if ( count( $parserOutput->getWarnings() ) ) {
1523                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
1524                         }
1525                 }
1526
1527                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
1528                         "<div class='previewnote'>" . $wgOut->parse( $note ) . "</div>\n";
1529                 if ( $this->isConflict ) {
1530                         $previewhead.='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1531                 }
1532
1533                 wfProfileOut( $fname );
1534                 return $previewhead . $previewHTML;
1535         }
1536
1537         /**
1538          * Call the stock "user is blocked" page
1539          */
1540         function blockedPage() {
1541                 global $wgOut, $wgUser;
1542                 $wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
1543
1544                 # If the user made changes, preserve them when showing the markup
1545                 # (This happens when a user is blocked during edit, for instance)
1546                 $first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
1547                 if( $first ) {
1548                         $source = $this->mTitle->exists() ? $this->getContent() : false;
1549                 } else {
1550                         $source = $this->textbox1;
1551                 }
1552
1553                 # Spit out the source or the user's modified version
1554                 if( $source !== false ) {
1555                         $rows = $wgUser->getOption( 'rows' );
1556                         $cols = $wgUser->getOption( 'cols' );
1557                         $attribs = array( 'id' => 'wpTextbox1', 'name' => 'wpTextbox1', 'cols' => $cols, 'rows' => $rows, 'readonly' => 'readonly' );
1558                         $wgOut->addHtml( '<hr />' );
1559                         $wgOut->addWikiText( wfMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() ) );
1560                         $wgOut->addHtml( wfOpenElement( 'textarea', $attribs ) . htmlspecialchars( $source ) . wfCloseElement( 'textarea' ) );
1561                 }
1562         }
1563
1564         /**
1565          * Produce the stock "please login to edit pages" page
1566          */
1567         function userNotLoggedInPage() {
1568                 global $wgUser, $wgOut, $wgTitle;
1569                 $skin = $wgUser->getSkin();
1570
1571                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1572                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $wgTitle->getPrefixedUrl() );
1573
1574                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1575                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1576                 $wgOut->setArticleRelated( false );
1577
1578                 $wgOut->addHtml( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
1579                 $wgOut->returnToMain( false, $wgTitle );
1580         }
1581
1582         /**
1583          * Creates a basic error page which informs the user that
1584          * they have attempted to edit a nonexistant section.
1585          */
1586         function noSuchSectionPage() {
1587                 global $wgOut, $wgTitle;
1588
1589                 $wgOut->setPageTitle( wfMsg( 'nosuchsectiontitle' ) );
1590                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1591                 $wgOut->setArticleRelated( false );
1592
1593                 $wgOut->addWikiText( wfMsg( 'nosuchsectiontext', $this->section ) );
1594                 $wgOut->returnToMain( false, $wgTitle );
1595         }
1596
1597         /**
1598          * Produce the stock "your edit contains spam" page
1599          *
1600          * @param $match Text which triggered one or more filters
1601          */
1602         function spamPage( $match = false ) {
1603                 global $wgOut, $wgTitle;
1604
1605                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1606                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1607                 $wgOut->setArticleRelated( false );
1608
1609                 $wgOut->addHtml( '<div id="spamprotected">' );
1610                 $wgOut->addWikiText( wfMsg( 'spamprotectiontext' ) );
1611                 if ( $match )
1612                         $wgOut->addWikiText( wfMsg( 'spamprotectionmatch',wfEscapeWikiText( $match ) ) );
1613                 $wgOut->addHtml( '</div>' );
1614
1615                 $wgOut->returnToMain( false, $wgTitle );
1616         }
1617
1618         /**
1619          * @private
1620          * @todo document
1621          */
1622         function mergeChangesInto( &$editText ){
1623                 $fname = 'EditPage::mergeChangesInto';
1624                 wfProfileIn( $fname );
1625
1626                 $db = wfGetDB( DB_MASTER );
1627
1628                 // This is the revision the editor started from
1629                 $baseRevision = Revision::loadFromTimestamp(
1630                         $db, $this->mTitle, $this->edittime );
1631                 if( is_null( $baseRevision ) ) {
1632                         wfProfileOut( $fname );
1633                         return false;
1634                 }
1635                 $baseText = $baseRevision->getText();
1636
1637                 // The current state, we want to merge updates into it
1638                 $currentRevision =  Revision::loadFromTitle(
1639                         $db, $this->mTitle );
1640                 if( is_null( $currentRevision ) ) {
1641                         wfProfileOut( $fname );
1642                         return false;
1643                 }
1644                 $currentText = $currentRevision->getText();
1645
1646                 $result = '';
1647                 if( wfMerge( $baseText, $editText, $currentText, $result ) ){
1648                         $editText = $result;
1649                         wfProfileOut( $fname );
1650                         return true;
1651                 } else {
1652                         wfProfileOut( $fname );
1653                         return false;
1654                 }
1655         }
1656
1657         /**
1658          * Check if the browser is on a blacklist of user-agents known to
1659          * mangle UTF-8 data on form submission. Returns true if Unicode
1660          * should make it through, false if it's known to be a problem.
1661          * @return bool
1662          * @private
1663          */
1664         function checkUnicodeCompliantBrowser() {
1665                 global $wgBrowserBlackList;
1666                 if( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
1667                         // No User-Agent header sent? Trust it by default...
1668                         return true;
1669                 }
1670                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1671                 foreach ( $wgBrowserBlackList as $browser ) {
1672                         if ( preg_match($browser, $currentbrowser) ) {
1673                                 return false;
1674                         }
1675                 }
1676                 return true;
1677         }
1678
1679         /**
1680          * @deprecated use $wgParser->stripSectionName()
1681          */
1682         function pseudoParseSectionAnchor( $text ) {
1683                 global $wgParser;
1684                 return $wgParser->stripSectionName( $text );
1685         }
1686
1687         /**
1688          * Format an anchor fragment as it would appear for a given section name
1689          * @param string $text
1690          * @return string
1691          * @private
1692          */
1693         function sectionAnchor( $text ) {
1694                 global $wgParser;
1695                 return $wgParser->guessSectionNameFromWikiText( $text );
1696         }
1697
1698         /**
1699          * Shows a bulletin board style toolbar for common editing functions.
1700          * It can be disabled in the user preferences.
1701          * The necessary JavaScript code can be found in style/wikibits.js.
1702          */
1703         function getEditToolbar() {
1704                 global $wgStylePath, $wgContLang, $wgJsMimeType;
1705
1706                 /**
1707                  * toolarray an array of arrays which each include the filename of
1708                  * the button image (without path), the opening tag, the closing tag,
1709                  * and optionally a sample text that is inserted between the two when no
1710                  * selection is highlighted.
1711                  * The tip text is shown when the user moves the mouse over the button.
1712                  *
1713                  * Already here are accesskeys (key), which are not used yet until someone
1714                  * can figure out a way to make them work in IE. However, we should make
1715                  * sure these keys are not defined on the edit page.
1716                  */
1717                 $toolarray = array(
1718                         array(  'image' => 'button_bold.png',
1719                                 'id'    => 'mw-editbutton-bold',
1720                                 'open'  => '\\\'\\\'\\\'',
1721                                 'close' => '\\\'\\\'\\\'',
1722                                 'sample'=> wfMsg('bold_sample'),
1723                                 'tip'   => wfMsg('bold_tip'),
1724                                 'key'   => 'B'
1725                         ),
1726                         array(  'image' => 'button_italic.png',
1727                                 'id'    => 'mw-editbutton-italic',
1728                                 'open'  => '\\\'\\\'',
1729                                 'close' => '\\\'\\\'',
1730                                 'sample'=> wfMsg('italic_sample'),
1731                                 'tip'   => wfMsg('italic_tip'),
1732                                 'key'   => 'I'
1733                         ),
1734                         array(  'image' => 'button_link.png',
1735                                 'id'    => 'mw-editbutton-link',
1736                                 'open'  => '[[',
1737                                 'close' => ']]',
1738                                 'sample'=> wfMsg('link_sample'),
1739                                 'tip'   => wfMsg('link_tip'),
1740                                 'key'   => 'L'
1741                         ),
1742                         array(  'image' => 'button_extlink.png',
1743                                 'id'    => 'mw-editbutton-extlink',
1744                                 'open'  => '[',
1745                                 'close' => ']',
1746                                 'sample'=> wfMsg('extlink_sample'),
1747                                 'tip'   => wfMsg('extlink_tip'),
1748                                 'key'   => 'X'
1749                         ),
1750                         array(  'image' => 'button_headline.png',
1751                                 'id'    => 'mw-editbutton-headline',
1752                                 'open'  => "\\n== ",
1753                                 'close' => " ==\\n",
1754                                 'sample'=> wfMsg('headline_sample'),
1755                                 'tip'   => wfMsg('headline_tip'),
1756                                 'key'   => 'H'
1757                         ),
1758                         array(  'image' => 'button_image.png',
1759                                 'id'    => 'mw-editbutton-image',
1760                                 'open'  => '[['.$wgContLang->getNsText(NS_IMAGE).":",
1761                                 'close' => ']]',
1762                                 'sample'=> wfMsg('image_sample'),
1763                                 'tip'   => wfMsg('image_tip'),
1764                                 'key'   => 'D'
1765                         ),
1766                         array(  'image' => 'button_media.png',
1767                                 'id'    => 'mw-editbutton-media',
1768                                 'open'  => '[['.$wgContLang->getNsText(NS_MEDIA).':',
1769                                 'close' => ']]',
1770                                 'sample'=> wfMsg('media_sample'),
1771                                 'tip'   => wfMsg('media_tip'),
1772                                 'key'   => 'M'
1773                         ),
1774                         array(  'image' => 'button_math.png',
1775                                 'id'    => 'mw-editbutton-math',
1776                                 'open'  => "<math>",
1777                                 'close' => "<\\/math>",
1778                                 'sample'=> wfMsg('math_sample'),
1779                                 'tip'   => wfMsg('math_tip'),
1780                                 'key'   => 'C'
1781                         ),
1782                         array(  'image' => 'button_nowiki.png',
1783                                 'id'    => 'mw-editbutton-nowiki',
1784                                 'open'  => "<nowiki>",
1785                                 'close' => "<\\/nowiki>",
1786                                 'sample'=> wfMsg('nowiki_sample'),
1787                                 'tip'   => wfMsg('nowiki_tip'),
1788                                 'key'   => 'N'
1789                         ),
1790                         array(  'image' => 'button_sig.png',
1791                                 'id'    => 'mw-editbutton-signature',
1792                                 'open'  => '--~~~~',
1793                                 'close' => '',
1794                                 'sample'=> '',
1795                                 'tip'   => wfMsg('sig_tip'),
1796                                 'key'   => 'Y'
1797                         ),
1798                         array(  'image' => 'button_hr.png',
1799                                 'id'    => 'mw-editbutton-hr',
1800                                 'open'  => "\\n----\\n",
1801                                 'close' => '',
1802                                 'sample'=> '',
1803                                 'tip'   => wfMsg('hr_tip'),
1804                                 'key'   => 'R'
1805                         )
1806                 );
1807                 $toolbar = "<div id='toolbar'>\n";
1808                 $toolbar.="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
1809
1810                 foreach($toolarray as $tool) {
1811
1812                         $cssId = $tool['id'];
1813                         $image=$wgStylePath.'/common/images/'.$tool['image'];
1814                         $open=$tool['open'];
1815                         $close=$tool['close'];
1816                         $sample = wfEscapeJsString( $tool['sample'] );
1817
1818                         // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
1819                         // Older browsers show a "speedtip" type message only for ALT.
1820                         // Ideally these should be different, realistically they
1821                         // probably don't need to be.
1822                         $tip = wfEscapeJsString( $tool['tip'] );
1823
1824                         #$key = $tool["key"];
1825
1826                         $toolbar.="addButton('$image','$tip','$open','$close','$sample','$cssId');\n";
1827                 }
1828
1829                 $toolbar.="/*]]>*/\n</script>";
1830                 $toolbar.="\n</div>";
1831                 return $toolbar;
1832         }
1833
1834         /**
1835          * Returns an array of html code of the following checkboxes:
1836          * minor and watch
1837          *
1838          * @param $tabindex Current tabindex
1839          * @param $skin Skin object
1840          * @param $checked Array of checkbox => bool, where bool indicates the checked
1841          *                 status of the checkbox
1842          *
1843          * @return array
1844          */
1845         public static function getCheckboxes( &$tabindex, $skin, $checked ) {
1846                 global $wgUser;
1847
1848                 $checkboxes = array();
1849
1850                 $checkboxes['minor'] = '';
1851                 $minorLabel = wfMsgExt('minoredit', array('parseinline'));
1852                 if ( $wgUser->isAllowed('minoredit') ) {
1853                         $attribs = array(
1854                                 'tabindex'  => ++$tabindex,
1855                                 'accesskey' => wfMsg( 'accesskey-minoredit' ),
1856                                 'id'        => 'wpMinoredit',
1857                         );
1858                         $checkboxes['minor'] =
1859                                 Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
1860                                 "&nbsp;<label for='wpMinoredit'".$skin->tooltipAndAccesskey('minoredit').">{$minorLabel}</label>";
1861                 }
1862
1863                 $watchLabel = wfMsgExt('watchthis', array('parseinline'));
1864                 $checkboxes['watch'] = '';
1865                 if ( $wgUser->isLoggedIn() ) {
1866                         $attribs = array(
1867                                 'tabindex'  => ++$tabindex,
1868                                 'accesskey' => wfMsg( 'accesskey-watch' ),
1869                                 'id'        => 'wpWatchthis',
1870                         );
1871                         $checkboxes['watch'] =
1872                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
1873                                 "&nbsp;<label for='wpWatchthis'".$skin->tooltipAndAccesskey('watch').">{$watchLabel}</label>";
1874                 }
1875                 return $checkboxes;
1876         }
1877
1878         /**
1879          * Returns an array of html code of the following buttons:
1880          * save, diff, preview and live
1881          *
1882          * @param $tabindex Current tabindex
1883          *
1884          * @return array
1885          */
1886         public function getEditButtons(&$tabindex) {
1887                 global $wgLivePreview, $wgUser;
1888
1889                 $buttons = array();
1890
1891                 $temp = array(
1892                         'id'        => 'wpSave',
1893                         'name'      => 'wpSave',
1894                         'type'      => 'submit',
1895                         'tabindex'  => ++$tabindex,
1896                         'value'     => wfMsg('savearticle'),
1897                         'accesskey' => wfMsg('accesskey-save'),
1898                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
1899                 );
1900                 $buttons['save'] = wfElement('input', $temp, '');
1901
1902                 ++$tabindex; // use the same for preview and live preview
1903                 if ( $wgLivePreview && $wgUser->getOption( 'uselivepreview' ) ) {
1904                         $temp = array(
1905                                 'id'        => 'wpPreview',
1906                                 'name'      => 'wpPreview',
1907                                 'type'      => 'submit',
1908                                 'tabindex'  => $tabindex,
1909                                 'value'     => wfMsg('showpreview'),
1910                                 'accesskey' => '',
1911                                 'title'     => wfMsg( 'tooltip-preview' ).' ['.wfMsg( 'accesskey-preview' ).']',
1912                                 'style'     => 'display: none;',
1913                         );
1914                         $buttons['preview'] = wfElement('input', $temp, '');
1915
1916                         $temp = array(
1917                                 'id'        => 'wpLivePreview',
1918                                 'name'      => 'wpLivePreview',
1919                                 'type'      => 'submit',
1920                                 'tabindex'  => $tabindex,
1921                                 'value'     => wfMsg('showlivepreview'),
1922                                 'accesskey' => wfMsg('accesskey-preview'),
1923                                 'title'     => '',
1924                                 'onclick'   => $this->doLivePreviewScript(),
1925                         );
1926                         $buttons['live'] = wfElement('input', $temp, '');
1927                 } else {
1928                         $temp = array(
1929                                 'id'        => 'wpPreview',
1930                                 'name'      => 'wpPreview',
1931                                 'type'      => 'submit',
1932                                 'tabindex'  => $tabindex,
1933                                 'value'     => wfMsg('showpreview'),
1934                                 'accesskey' => wfMsg('accesskey-preview'),
1935                                 'title'     => wfMsg( 'tooltip-preview' ).' ['.wfMsg( 'accesskey-preview' ).']',
1936                         );
1937                         $buttons['preview'] = wfElement('input', $temp, '');
1938                         $buttons['live'] = '';
1939                 }
1940
1941                 $temp = array(
1942                         'id'        => 'wpDiff',
1943                         'name'      => 'wpDiff',
1944                         'type'      => 'submit',
1945                         'tabindex'  => ++$tabindex,
1946                         'value'     => wfMsg('showdiff'),
1947                         'accesskey' => wfMsg('accesskey-diff'),
1948                         'title'     => wfMsg( 'tooltip-diff' ).' ['.wfMsg( 'accesskey-diff' ).']',
1949                 );
1950                 $buttons['diff'] = wfElement('input', $temp, '');
1951
1952                 return $buttons;
1953         }
1954
1955         /**
1956          * Output preview text only. This can be sucked into the edit page
1957          * via JavaScript, and saves the server time rendering the skin as
1958          * well as theoretically being more robust on the client (doesn't
1959          * disturb the edit box's undo history, won't eat your text on
1960          * failure, etc).
1961          *
1962          * @todo This doesn't include category or interlanguage links.
1963          *       Would need to enhance it a bit, <s>maybe wrap them in XML
1964          *       or something...</s> that might also require more skin
1965          *       initialization, so check whether that's a problem.
1966          */
1967         function livePreview() {
1968                 global $wgOut;
1969                 $wgOut->disable();
1970                 header( 'Content-type: text/xml; charset=utf-8' );
1971                 header( 'Cache-control: no-cache' );
1972
1973                 $previewText = $this->getPreviewText();
1974                 #$categories = $skin->getCategoryLinks();
1975
1976                 $s =
1977                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
1978                 Xml::tags( 'livepreview', null,
1979                         Xml::element( 'preview', null, $previewText )
1980                         #.      Xml::element( 'category', null, $categories )
1981                 );
1982                 echo $s;
1983         }
1984
1985
1986         /**
1987          * Get a diff between the current contents of the edit box and the
1988          * version of the page we're editing from.
1989          *
1990          * If this is a section edit, we'll replace the section as for final
1991          * save and then make a comparison.
1992          */
1993         function showDiff() {
1994                 $oldtext = $this->mArticle->fetchContent();
1995                 $newtext = $this->mArticle->replaceSection(
1996                         $this->section, $this->textbox1, $this->summary, $this->edittime );
1997                 $newtext = $this->mArticle->preSaveTransform( $newtext );
1998                 $oldtitle = wfMsgExt( 'currentrev', array('parseinline') );
1999                 $newtitle = wfMsgExt( 'yourtext', array('parseinline') );
2000                 if ( $oldtext !== false  || $newtext != '' ) {
2001                         $de = new DifferenceEngine( $this->mTitle );
2002                         $de->setText( $oldtext, $newtext );
2003                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2004                         $de->showDiffStyle();
2005                 } else {
2006                         $difftext = '';
2007                 }
2008
2009                 global $wgOut;
2010                 $wgOut->addHtml( '<div id="wikiDiff">' . $difftext . '</div>' );
2011         }
2012
2013         /**
2014          * Filter an input field through a Unicode de-armoring process if it
2015          * came from an old browser with known broken Unicode editing issues.
2016          *
2017          * @param WebRequest $request
2018          * @param string $field
2019          * @return string
2020          * @private
2021          */
2022         function safeUnicodeInput( $request, $field ) {
2023                 $text = rtrim( $request->getText( $field ) );
2024                 return $request->getBool( 'safemode' )
2025                         ? $this->unmakesafe( $text )
2026                         : $text;
2027         }
2028
2029         /**
2030          * Filter an output field through a Unicode armoring process if it is
2031          * going to an old browser with known broken Unicode editing issues.
2032          *
2033          * @param string $text
2034          * @return string
2035          * @private
2036          */
2037         function safeUnicodeOutput( $text ) {
2038                 global $wgContLang;
2039                 $codedText = $wgContLang->recodeForEdit( $text );
2040                 return $this->checkUnicodeCompliantBrowser()
2041                         ? $codedText
2042                         : $this->makesafe( $codedText );
2043         }
2044
2045         /**
2046          * A number of web browsers are known to corrupt non-ASCII characters
2047          * in a UTF-8 text editing environment. To protect against this,
2048          * detected browsers will be served an armored version of the text,
2049          * with non-ASCII chars converted to numeric HTML character references.
2050          *
2051          * Preexisting such character references will have a 0 added to them
2052          * to ensure that round-trips do not alter the original data.
2053          *
2054          * @param string $invalue
2055          * @return string
2056          * @private
2057          */
2058         function makesafe( $invalue ) {
2059                 // Armor existing references for reversability.
2060                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
2061
2062                 $bytesleft = 0;
2063                 $result = "";
2064                 $working = 0;
2065                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2066                         $bytevalue = ord( $invalue{$i} );
2067                         if( $bytevalue <= 0x7F ) { //0xxx xxxx
2068                                 $result .= chr( $bytevalue );
2069                                 $bytesleft = 0;
2070                         } elseif( $bytevalue <= 0xBF ) { //10xx xxxx
2071                                 $working = $working << 6;
2072                                 $working += ($bytevalue & 0x3F);
2073                                 $bytesleft--;
2074                                 if( $bytesleft <= 0 ) {
2075                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
2076                                 }
2077                         } elseif( $bytevalue <= 0xDF ) { //110x xxxx
2078                                 $working = $bytevalue & 0x1F;
2079                                 $bytesleft = 1;
2080                         } elseif( $bytevalue <= 0xEF ) { //1110 xxxx
2081                                 $working = $bytevalue & 0x0F;
2082                                 $bytesleft = 2;
2083                         } else { //1111 0xxx
2084                                 $working = $bytevalue & 0x07;
2085                                 $bytesleft = 3;
2086                         }
2087                 }
2088                 return $result;
2089         }
2090
2091         /**
2092          * Reverse the previously applied transliteration of non-ASCII characters
2093          * back to UTF-8. Used to protect data from corruption by broken web browsers
2094          * as listed in $wgBrowserBlackList.
2095          *
2096          * @param string $invalue
2097          * @return string
2098          * @private
2099          */
2100         function unmakesafe( $invalue ) {
2101                 $result = "";
2102                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2103                         if( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
2104                                 $i += 3;
2105                                 $hexstring = "";
2106                                 do {
2107                                         $hexstring .= $invalue{$i};
2108                                         $i++;
2109                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
2110
2111                                 // Do some sanity checks. These aren't needed for reversability,
2112                                 // but should help keep the breakage down if the editor
2113                                 // breaks one of the entities whilst editing.
2114                                 if ((substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6)) {
2115                                         $codepoint = hexdec($hexstring);
2116                                         $result .= codepointToUtf8( $codepoint );
2117                                 } else {
2118                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
2119                                 }
2120                         } else {
2121                                 $result .= substr( $invalue, $i, 1 );
2122                         }
2123                 }
2124                 // reverse the transform that we made for reversability reasons.
2125                 return strtr( $result, array( "&#x0" => "&#x" ) );
2126         }
2127
2128         function noCreatePermission() {
2129                 global $wgOut;
2130                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
2131                 $wgOut->addWikiText( wfMsg( 'nocreatetext' ) );
2132         }
2133
2134         /**
2135          * If there are rows in the deletion log for this page, show them,
2136          * along with a nice little note for the user
2137          *
2138          * @param OutputPage $out
2139          */
2140         private function showDeletionLog( $out ) {
2141                 $title = $this->mTitle;
2142                 $reader = new LogReader(
2143                         new FauxRequest(
2144                                 array(
2145                                         'page' => $title->getPrefixedText(),
2146                                         'type' => 'delete',
2147                                         )
2148                         )
2149                 );
2150                 if( $reader->hasRows() ) {
2151                         $out->addHtml( '<div id="mw-recreate-deleted-warn">' );
2152                         $out->addWikiText( wfMsg( 'recreate-deleted-warn' ) );
2153                         $viewer = new LogViewer( $reader );
2154                         $viewer->showList( $out );
2155                         $out->addHtml( '</div>' );
2156                 }
2157         }
2158
2159         /**
2160          * Attempt submission
2161          * @return bool false if output is done, true if the rest of the form should be displayed
2162          */
2163         function attemptSave() {
2164                 global $wgUser, $wgOut, $wgTitle, $wgRequest;
2165
2166                 $resultDetails = false;
2167                 $value = $this->internalAttemptSave( $resultDetails, $wgUser->isAllowed('bot') && $wgRequest->getBool('bot', true) );
2168
2169                 if( $value == self::AS_SUCCESS_UPDATE || $value == self::AS_SUCCESS_NEW_ARTICLE ) {
2170                         $this->didSave = true;
2171                 }
2172
2173                 switch ($value)
2174                 {
2175                         case self::AS_HOOK_ERROR_EXPECTED:
2176                         case self::AS_CONTENT_TOO_BIG:
2177                         case self::AS_ARTICLE_WAS_DELETED:
2178                         case self::AS_CONFLICT_DETECTED:
2179                         case self::AS_SUMMARY_NEEDED:
2180                         case self::AS_TEXTBOX_EMPTY:
2181                         case self::AS_MAX_ARTICLE_SIZE_EXCEDED:
2182                         case self::AS_END:
2183                                 return true;
2184
2185                         case self::AS_HOOK_ERROR:
2186                         case self::AS_FILTERING:
2187                         case self::AS_SUCCESS_NEW_ARTICLE:
2188                         case self::AS_SUCCESS_UPDATE:
2189                                 return false;
2190
2191                         case self::AS_SPAM_ERROR:
2192                                 $this->spamPage ( $resultDetails['spam'] );
2193                                 return false;
2194
2195                         case self::AS_BLOCKED_PAGE_FOR_USER:
2196                                 $this->blockedPage();
2197                                 return false;
2198
2199                         case self::AS_READ_ONLY_PAGE_ANON:
2200                                 $this->userNotLoggedInPage();
2201                                 return false;
2202
2203                         case self::AS_READ_ONLY_PAGE_LOGGED:
2204                         case self::AS_READ_ONLY_PAGE:
2205                                 $wgOut->readOnlyPage();
2206                                 return false;
2207
2208                         case self::AS_RATE_LIMITED:
2209                                 $wgOut->rateLimited();
2210                                 return false;
2211
2212                         case self::AS_NO_CREATE_PERMISSION;
2213                                 $this->noCreatePermission();
2214                                 return;
2215
2216                         case self::AS_BLANK_ARTICLE:
2217                                 $wgOut->redirect( $wgTitle->getFullURL() );
2218                                 return false;
2219                 }
2220         }
2221 }