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