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