includes/EditPage.php

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