includes/EditPage.php

   1 <?php
   2 /**
   3  * Contains the EditPage class
   4  * @file
   5  */
   6
   7 /**
   8  * The edit page/HTML interface (split from Article)
   9  * The actual database and text munging is still in Article,
  10  * but it should get easier to call those from alternate
  11  * interfaces.
  12  *
  13  * EditPage cares about two distinct titles:
  14  * $wgTitle is the page that forms submit to, links point to,
  15  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  16  * page in the database that is actually being edited. These are
  17  * usually the same, but they are now allowed to be different.
  18  */
  19 class EditPage {
  20         const AS_SUCCESS_UPDATE                 = 200;
  21         const AS_SUCCESS_NEW_ARTICLE            = 201;
  22         const AS_HOOK_ERROR                     = 210;
  23         const AS_FILTERING                      = 211;
  24         const AS_HOOK_ERROR_EXPECTED            = 212;
  25         const AS_BLOCKED_PAGE_FOR_USER          = 215;
  26         const AS_CONTENT_TOO_BIG                = 216;
  27         const AS_USER_CANNOT_EDIT               = 217;
  28         const AS_READ_ONLY_PAGE_ANON            = 218;
  29         const AS_READ_ONLY_PAGE_LOGGED          = 219;
  30         const AS_READ_ONLY_PAGE                 = 220;
  31         const AS_RATE_LIMITED                   = 221;
  32         const AS_ARTICLE_WAS_DELETED            = 222;
  33         const AS_NO_CREATE_PERMISSION           = 223;
  34         const AS_BLANK_ARTICLE                  = 224;
  35         const AS_CONFLICT_DETECTED              = 225;
  36         const AS_SUMMARY_NEEDED                 = 226;
  37         const AS_TEXTBOX_EMPTY                  = 228;
  38         const AS_MAX_ARTICLE_SIZE_EXCEEDED      = 229;
  39         const AS_OK                             = 230;
  40         const AS_END                            = 231;
  41         const AS_SPAM_ERROR                     = 232;
  42         const AS_IMAGE_REDIRECT_ANON            = 233;
  43         const AS_IMAGE_REDIRECT_LOGGED          = 234;
  44
  45         var $mArticle;
  46         var $mTitle;
  47         var $action;
  48         var $mMetaData = '';
  49         var $isConflict = false;
  50         var $isCssJsSubpage = false;
  51         var $deletedSinceEdit = false;
  52         var $formtype;
  53         var $firsttime;
  54         var $lastDelete;
  55         var $mTokenOk = false;
  56         var $mTokenOkExceptSuffix = false;
  57         var $mTriedSave = false;
  58         var $tooBig = false;
  59         var $kblength = false;
  60         var $missingComment = false;
  61         var $missingSummary = false;
  62         var $allowBlankSummary = false;
  63         var $autoSumm = '';
  64         var $hookError = '';
  65         #var $mPreviewTemplates;
  66         var $mParserOutput;
  67         var $mBaseRevision = false;
  68
  69         # Form values
  70         var $save = false, $preview = false, $diff = false;
  71         var $minoredit = false, $watchthis = false, $recreate = false;
  72         var $textbox1 = '', $textbox2 = '', $summary = '';
  73         var $edittime = '', $section = '', $starttime = '';
  74         var $oldid = 0, $editintro = '', $scrolltop = null;
  75
  76         # Placeholders for text injection by hooks (must be HTML)
  77         # extensions should take care to _append_ to the present value
  78         public $editFormPageTop; // Before even the preview
  79         public $editFormTextTop;
  80         public $editFormTextBeforeContent;
  81         public $editFormTextAfterWarn;
  82         public $editFormTextAfterTools;
  83         public $editFormTextBottom;
  84
  85         /* $didSave should be set to true whenever an article was succesfully altered. */
  86         public $didSave = false;
  87
  88         public $suppressIntro = false;
  89
  90         /**
  91          * @todo document
  92          * @param $article
  93          */
  94         function EditPage( $article ) {
  95                 $this->mArticle =& $article;
  96                 $this->mTitle = $article->getTitle();
  97                 $this->action = 'submit';
  98
  99                 # Placeholders for text injection by hooks (empty per default)
 100                 $this->editFormPageTop =
 101                 $this->editFormTextTop =
 102                 $this->editFormTextBeforeContent =
 103                 $this->editFormTextAfterWarn =
 104                 $this->editFormTextAfterTools =
 105                 $this->editFormTextBottom = "";
 106         }
 107
 108         /**
 109          * Fetch initial editing page content.
 110          * @private
 111          */
 112         function getContent( $def_text = '' ) {
 113                 global $wgOut, $wgRequest, $wgParser, $wgMessageCache;
 114
 115                 wfProfileIn( __METHOD__ );
 116                 # Get variables from query string :P
 117                 $section = $wgRequest->getVal( 'section' );
 118                 $preload = $wgRequest->getVal( 'preload' );
 119                 $undoafter = $wgRequest->getVal( 'undoafter' );
 120                 $undo = $wgRequest->getVal( 'undo' );
 121
 122                 $text = '';
 123                 // For message page not locally set, use the i18n message.
 124                 // For other non-existent articles, use preload text if any.
 125                 if ( !$this->mTitle->exists() ) {
 126                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 127                                 $wgMessageCache->loadAllMessages();
 128                                 # If this is a system message, get the default text.
 129                                 $text = wfMsgWeirdKey( $this->mTitle->getText() ) ;
 130                         } else {
 131                                 # If requested, preload some text.
 132                                 $text = $this->getPreloadedText( $preload );
 133                         }
 134                 // For existing pages, get text based on "undo" or section parameters.
 135                 } else {
 136                         $text = $this->mArticle->getContent();
 137                         if ( $undo > 0 && $undoafter > 0 && $undo < $undoafter ) {
 138                                 # If they got undoafter and undo round the wrong way, switch them
 139                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 140                         }
 141                         if ( $undo > 0 && $undo > $undoafter ) {
 142                                 # Undoing a specific edit overrides section editing; section-editing
 143                                 # doesn't work with undoing.
 144                                 if ( $undoafter ) {
 145                                         $undorev = Revision::newFromId($undo);
 146                                         $oldrev = Revision::newFromId($undoafter);
 147                                 } else {
 148                                         $undorev = Revision::newFromId($undo);
 149                                         $oldrev = $undorev ? $undorev->getPrevious() : null;
 150                                 }
 151
 152                                 # Sanity check, make sure it's the right page,
 153                                 # the revisions exist and they were not deleted.
 154                                 # Otherwise, $text will be left as-is.
 155                                 if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 156                                         $undorev->getPage() == $oldrev->getPage() &&
 157                                         $undorev->getPage() == $this->mArticle->getID() &&
 158                                         !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 159                                         !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 160                                         $undorev_text = $undorev->getText();
 161                                         $oldrev_text = $oldrev->getText();
 162                                         $currev_text = $text;
 163
 164                                         if ( $currev_text != $undorev_text ) {
 165                                                 $result = wfMerge( $undorev_text, $oldrev_text, $currev_text, $text );
 166                                         } else {
 167                                                 # No use doing a merge if it's just a straight revert.
 168                                                 $text = $oldrev_text;
 169                                                 $result = true;
 170                                         }
 171                                         if ( $result ) {
 172                                                 # Inform the user of our success and set an automatic edit summary
 173                                                 $this->editFormPageTop .= $wgOut->parse( wfMsgNoTrans( 'undo-success' ) );
 174                                                 $firstrev = $oldrev->getNext();
 175                                                 # If we just undid one rev, use an autosummary
 176                                                 if ( $firstrev->mId == $undo ) {
 177                                                         $this->summary = wfMsgForContent('undo-summary', $undo, $undorev->getUserText());
 178                                                 }
 179                                                 $this->formtype = 'diff';
 180                                         } else {
 181                                                 # Warn the user that something went wrong
 182                                                 $this->editFormPageTop .= $wgOut->parse( wfMsgNoTrans( 'undo-failure' ) );
 183                                         }
 184                                 } else {
 185                                         // Failed basic sanity checks.
 186                                         // Older revisions may have been removed since the link
 187                                         // was created, or we may simply have got bogus input.
 188                                         $this->editFormPageTop .= $wgOut->parse( wfMsgNoTrans( 'undo-norev' ) );
 189                                 }
 190                         } else if ( $section != '' ) {
 191                                 if ( $section == 'new' ) {
 192                                         $text = $this->getPreloadedText( $preload );
 193                                 } else {
 194                                         $text = $wgParser->getSection( $text, $section, $def_text );
 195                                 }
 196                         }
 197                 }
 198
 199                 wfProfileOut( __METHOD__ );
 200                 return $text;
 201         }
 202
 203         /**
 204          * Get the contents of a page from its title and remove includeonly tags
 205          *
 206          * @param $preload String: the title of the page.
 207          * @return string The contents of the page.
 208          */
 209         protected function getPreloadedText( $preload ) {
 210                 if ( $preload === '' ) {
 211                         return '';
 212                 } else {
 213                         $preloadTitle = Title::newFromText( $preload );
 214                         if ( isset( $preloadTitle ) && $preloadTitle->userCanRead() ) {
 215                                 $rev = Revision::newFromTitle($preloadTitle);
 216                                 if ( is_object( $rev ) ) {
 217                                         $text = $rev->getText();
 218                                         // TODO FIXME: AAAAAAAAAAA, this shouldn't be implementing
 219                                         // its own mini-parser! -ævar
 220                                         $text = preg_replace( '~</?includeonly>~', '', $text );
 221                                         return $text;
 222                                 } else
 223                                         return '';
 224                         }
 225                 }
 226         }
 227
 228         /**
 229          * This is the function that extracts metadata from the article body on the first view.
 230          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
 231          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
 232          */
 233         function extractMetaDataFromArticle () {
 234                 global $wgUseMetadataEdit , $wgMetadataWhitelist , $wgLang ;
 235                 $this->mMetaData = '' ;
 236                 if ( !$wgUseMetadataEdit ) return ;
 237                 if ( $wgMetadataWhitelist == '' ) return ;
 238                 $s = '' ;
 239                 $t = $this->getContent();
 240
 241                 # MISSING : <nowiki> filtering
 242
 243                 # Categories and language links
 244                 $t = explode ( "\n" , $t ) ;
 245                 $catlow = strtolower ( $wgLang->getNsText ( NS_CATEGORY ) ) ;
 246                 $cat = $ll = array() ;
 247                 foreach ( $t AS $key => $x )
 248                 {
 249                         $y = trim ( strtolower ( $x ) ) ;
 250                         while ( substr ( $y , 0 , 2 ) == '[[' )
 251                         {
 252                                 $y = explode ( ']]' , trim ( $x ) ) ;
 253                                 $first = array_shift ( $y ) ;
 254                                 $first = explode ( ':' , $first ) ;
 255                                 $ns = array_shift ( $first ) ;
 256                                 $ns = trim ( str_replace ( '[' , '' , $ns ) ) ;
 257                                 if ( strlen ( $ns ) == 2 OR strtolower ( $ns ) == $catlow )
 258                                 {
 259                                         $add = '[[' . $ns . ':' . implode ( ':' , $first ) . ']]' ;
 260                                         if ( strtolower ( $ns ) == $catlow ) $cat[] = $add ;
 261                                         else $ll[] = $add ;
 262                                         $x = implode ( ']]' , $y ) ;
 263                                         $t[$key] = $x ;
 264                                         $y = trim ( strtolower ( $x ) ) ;
 265                                 }
 266                         }
 267                 }
 268                 if ( count ( $cat ) ) $s .= implode ( ' ' , $cat ) . "\n" ;
 269                 if ( count ( $ll ) ) $s .= implode ( ' ' , $ll ) . "\n" ;
 270                 $t = implode ( "\n" , $t ) ;
 271
 272                 # Load whitelist
 273                 $sat = array () ; # stand-alone-templates; must be lowercase
 274                 $wl_title = Title::newFromText ( $wgMetadataWhitelist ) ;
 275                 $wl_article = new Article ( $wl_title ) ;
 276                 $wl = explode ( "\n" , $wl_article->getContent() ) ;
 277                 foreach ( $wl AS $x )
 278                 {
 279                         $isentry = false ;
 280                         $x = trim ( $x ) ;
 281                         while ( substr ( $x , 0 , 1 ) == '*' )
 282                         {
 283                                 $isentry = true ;
 284                                 $x = trim ( substr ( $x , 1 ) ) ;
 285                         }
 286                         if ( $isentry )
 287                         {
 288                                 $sat[] = strtolower ( $x ) ;
 289                         }
 290
 291                 }
 292
 293                 # Templates, but only some
 294                 $t = explode ( '{{' , $t ) ;
 295                 $tl = array () ;
 296                 foreach ( $t AS $key => $x )
 297                 {
 298                         $y = explode ( '}}' , $x , 2 ) ;
 299                         if ( count ( $y ) == 2 )
 300                         {
 301                                 $z = $y[0] ;
 302                                 $z = explode ( '|' , $z ) ;
 303                                 $tn = array_shift ( $z ) ;
 304                                 if ( in_array ( strtolower ( $tn ) , $sat ) )
 305                                 {
 306                                         $tl[] = '{{' . $y[0] . '}}' ;
 307                                         $t[$key] = $y[1] ;
 308                                         $y = explode ( '}}' , $y[1] , 2 ) ;
 309                                 }
 310                                 else $t[$key] = '{{' . $x ;
 311                         }
 312                         else if ( $key != 0 ) $t[$key] = '{{' . $x ;
 313                         else $t[$key] = $x ;
 314                 }
 315                 if ( count ( $tl ) ) $s .= implode ( ' ' , $tl ) ;
 316                 $t = implode ( '' , $t ) ;
 317
 318                 $t = str_replace ( "\n\n\n" , "\n" , $t ) ;
 319                 $this->mArticle->mContent = $t ;
 320                 $this->mMetaData = $s ;
 321         }
 322
 323         /*
 324          * Check if a page was deleted while the user was editing it, before submit.
 325          * Note that we rely on the logging table, which hasn't been always there,
 326          * but that doesn't matter, because this only applies to brand new
 327          * deletes.
 328          */
 329         protected function wasDeletedSinceLastEdit() {
 330                 if ( $this->deletedSinceEdit )
 331                         return true;
 332                 if ( $this->mTitle->isDeleted() ) {
 333                         $this->lastDelete = $this->getLastDelete();
 334                         if ( $this->lastDelete ) {
 335                                 $deletetime = $this->lastDelete->log_timestamp;
 336                                 if ( ($deletetime - $this->starttime) > 0 ) {
 337                                         $this->deletedSinceEdit = true;
 338                                 }
 339                         }
 340                 }
 341                 return $this->deletedSinceEdit;
 342         }
 343
 344         function submit() {
 345                 $this->edit();
 346         }
 347
 348         /**
 349          * This is the function that gets called for "action=edit". It
 350          * sets up various member variables, then passes execution to
 351          * another function, usually showEditForm()
 352          *
 353          * The edit form is self-submitting, so that when things like
 354          * preview and edit conflicts occur, we get the same form back
 355          * with the extra stuff added.  Only when the final submission
 356          * is made and all is well do we actually save and redirect to
 357          * the newly-edited page.
 358          */
 359         function edit() {
 360                 global $wgOut, $wgUser, $wgRequest;
 361                 // Allow extensions to modify/prevent this form or submission
 362                 if ( !wfRunHooks( 'AlternateEdit', array( &$this ) ) ) {
 363                         return;
 364                 }
 365
 366                 wfProfileIn( __METHOD__ );
 367                 wfDebug( __METHOD__.": enter\n" );
 368
 369                 // This is not an article
 370                 $wgOut->setArticleFlag( false );
 371
 372                 $this->importFormData( $wgRequest );
 373                 $this->firsttime = false;
 374
 375                 if ( $this->live ) {
 376                         $this->livePreview();
 377                         wfProfileOut( __METHOD__ );
 378                         return;
 379                 }
 380
 381                 if ( wfReadOnly() ) {
 382                         if ( $this->save ){
 383                                 // Force preview
 384                                 $this->save = false;
 385                                 $this->preview = true;
 386                         } elseif ( $this->preview || $this->diff ) {
 387                                 // A warning will be displayed instead
 388                         } else {
 389                                 $this->readOnlyPage( $this->getContent() );
 390                                 wfProfileOut( __METHOD__ );
 391                                 return;
 392                         }
 393                 }
 394
 395                 $wgOut->addScriptFile( 'edit.js' );
 396                 $permErrors = $this->getEditPermissionErrors();
 397                 if ( $permErrors ) {
 398                         wfDebug( __METHOD__.": User can't edit\n" );
 399                         $this->readOnlyPage( $this->getContent(), true, $permErrors, 'edit' );
 400                         wfProfileOut( __METHOD__ );
 401                         return;
 402                 } else {
 403                         if ( $this->save ) {
 404                                 $this->formtype = 'save';
 405                         } else if ( $this->preview ) {
 406                                 $this->formtype = 'preview';
 407                         } else if ( $this->diff ) {
 408                                 $this->formtype = 'diff';
 409                         } else { # First time through
 410                                 $this->firsttime = true;
 411                                 if ( $this->previewOnOpen() ) {
 412                                         $this->formtype = 'preview';
 413                                 } else {
 414                                         $this->extractMetaDataFromArticle () ;
 415                                         $this->formtype = 'initial';
 416                                 }
 417                         }
 418                 }
 419
 420                 wfProfileIn( __METHOD__."-business-end" );
 421
 422                 $this->isConflict = false;
 423                 // css / js subpages of user pages get a special treatment
 424                 $this->isCssJsSubpage      = $this->mTitle->isCssJsSubpage();
 425                 $this->isValidCssJsSubpage = $this->mTitle->isValidCssJsSubpage();
 426
 427                 # Show applicable editing introductions
 428                 if ( $this->formtype == 'initial' || $this->firsttime )
 429                         $this->showIntro();
 430
 431                 if ( $this->mTitle->isTalkPage() ) {
 432                         $wgOut->addWikiMsg( 'talkpagetext' );
 433                 }
 434
 435                 # Optional notices on a per-namespace and per-page basis
 436                 $editnotice_ns   = 'editnotice-'.$this->mTitle->getNamespace();
 437                 $editnotice_page = $editnotice_ns.'-'.$this->mTitle->getDBkey();
 438                 if ( !wfEmptyMsg( $editnotice_ns, wfMsgForContent( $editnotice_ns ) ) ) {
 439                         $wgOut->addWikiText( wfMsgForContent( $editnotice_ns )  );
 440                 }
 441                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
 442                         $parts = explode( '/', $this->mTitle->getDBkey() );
 443                         $editnotice_base = $editnotice_ns;
 444                         while ( count( $parts ) > 0 ) {
 445                                 $editnotice_base .= '-'.array_shift( $parts );
 446                                 if ( !wfEmptyMsg( $editnotice_base, wfMsgForContent( $editnotice_base ) ) ) {
 447                                         $wgOut->addWikiText( wfMsgForContent( $editnotice_base )  );
 448                                 }
 449                         }
 450                 } else if ( !wfEmptyMsg( $editnotice_page, wfMsgForContent( $editnotice_page ) ) ) {
 451                         $wgOut->addWikiText( wfMsgForContent( $editnotice_page ) );
 452                 }
 453
 454                 # Attempt submission here.  This will check for edit conflicts,
 455                 # and redundantly check for locked database, blocked IPs, etc.
 456                 # that edit() already checked just in case someone tries to sneak
 457                 # in the back door with a hand-edited submission URL.
 458
 459                 if ( 'save' == $this->formtype ) {
 460                         if ( !$this->attemptSave() ) {
 461                                 wfProfileOut( __METHOD__."-business-end" );
 462                                 wfProfileOut( __METHOD__ );
 463                                 return;
 464                         }
 465                 }
 466
 467                 # First time through: get contents, set time for conflict
 468                 # checking, etc.
 469                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 470                         if ( $this->initialiseForm() === false) {
 471                                 $this->noSuchSectionPage();
 472                                 wfProfileOut( __METHOD__."-business-end" );
 473                                 wfProfileOut( __METHOD__ );
 474                                 return;
 475                         }
 476                         if ( !$this->mTitle->getArticleId() )
 477                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 478                 }
 479
 480                 $this->showEditForm();
 481                 wfProfileOut( __METHOD__."-business-end" );
 482                 wfProfileOut( __METHOD__ );
 483         }
 484
 485         protected function getEditPermissionErrors() {
 486                 global $wgUser;
 487                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 488                 # Can this title be created?
 489                 if ( !$this->mTitle->exists() ) {
 490                         $permErrors = array_merge( $permErrors,
 491                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 492                 }
 493                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 494                 $remove = array();
 495                 foreach( $permErrors as $error ) {
 496                         if ( ($this->preview || $this->diff) &&
 497                                 ($error[0] == 'blockedtext' || $error[0] == 'autoblockedtext') )
 498                         {
 499                                 $remove[] = $error;
 500                         }
 501                 }
 502                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 503                 return $permErrors;
 504         }
 505
 506         /**
 507          * Show a read-only error
 508          * Parameters are the same as OutputPage:readOnlyPage()
 509          * Redirect to the article page if redlink=1
 510          */
 511         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 512                 global $wgRequest, $wgOut;
 513                 if ( $wgRequest->getBool( 'redlink' ) ) {
 514                         // The edit page was reached via a red link.
 515                         // Redirect to the article page and let them click the edit tab if
 516                         // they really want a permission error.
 517                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 518                 } else {
 519                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 520                 }
 521         }
 522
 523         /**
 524          * Should we show a preview when the edit form is first shown?
 525          *
 526          * @return bool
 527          */
 528         protected function previewOnOpen() {
 529                 global $wgRequest, $wgUser;
 530                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 531                         // Explicit override from request
 532                         return true;
 533                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 534                         // Explicit override from request
 535                         return false;
 536                 } elseif ( $this->section == 'new' ) {
 537                         // Nothing *to* preview for new sections
 538                         return false;
 539                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== '' || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 540                         // Standard preference behaviour
 541                         return true;
 542                 } elseif ( !$this->mTitle->exists() && $this->mTitle->getNamespace() == NS_CATEGORY ) {
 543                         // Categories are special
 544                         return true;
 545                 } else {
 546                         return false;
 547                 }
 548         }
 549
 550         /**
 551          * @todo document
 552          * @param $request
 553          */
 554         function importFormData( &$request ) {
 555                 global $wgLang, $wgUser;
 556                 $fname = 'EditPage::importFormData';
 557                 wfProfileIn( $fname );
 558
 559                 # Section edit can come from either the form or a link
 560                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 561
 562                 if ( $request->wasPosted() ) {
 563                         # These fields need to be checked for encoding.
 564                         # Also remove trailing whitespace, but don't remove _initial_
 565                         # whitespace from the text boxes. This may be significant formatting.
 566                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 567                         $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
 568                         $this->mMetaData = rtrim( $request->getText( 'metadata' ) );
 569                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 570                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary'  ), 250 );
 571
 572                         # Remove extra headings from summaries and new sections.
 573                         $this->summary = preg_replace('/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary);
 574
 575                         $this->edittime = $request->getVal( 'wpEdittime' );
 576                         $this->starttime = $request->getVal( 'wpStarttime' );
 577
 578                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 579
 580                         if ( is_null( $this->edittime ) ) {
 581                                 # If the form is incomplete, force to preview.
 582                                 wfDebug( "$fname: Form data appears to be incomplete\n" );
 583                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 584                                 $this->preview  = true;
 585                         } else {
 586                                 /* Fallback for live preview */
 587                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 588                                 $this->diff = $request->getCheck( 'wpDiff' );
 589
 590                                 // Remember whether a save was requested, so we can indicate
 591                                 // if we forced preview due to session failure.
 592                                 $this->mTriedSave = !$this->preview;
 593
 594                                 if ( $this->tokenOk( $request ) ) {
 595                                         # Some browsers will not report any submit button
 596                                         # if the user hits enter in the comment box.
 597                                         # The unmarked state will be assumed to be a save,
 598                                         # if the form seems otherwise complete.
 599                                         wfDebug( "$fname: Passed token check.\n" );
 600                                 } else if ( $this->diff ) {
 601                                         # Failed token check, but only requested "Show Changes".
 602                                         wfDebug( "$fname: Failed token check; Show Changes requested.\n" );
 603                                 } else {
 604                                         # Page might be a hack attempt posted from
 605                                         # an external site. Preview instead of saving.
 606                                         wfDebug( "$fname: Failed token check; forcing preview\n" );
 607                                         $this->preview = true;
 608                                 }
 609                         }
 610                         $this->save = !$this->preview && !$this->diff;
 611                         if ( !preg_match( '/^\d{14}$/', $this->edittime )) {
 612                                 $this->edittime = null;
 613                         }
 614
 615                         if ( !preg_match( '/^\d{14}$/', $this->starttime )) {
 616                                 $this->starttime = null;
 617                         }
 618
 619                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 620
 621                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 622                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 623
 624                         # Don't force edit summaries when a user is editing their own user or talk page
 625                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 626                                 $this->mTitle->getText() == $wgUser->getName() )
 627                         {
 628                                 $this->allowBlankSummary = true;
 629                         } else {
 630                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary');
 631                         }
 632
 633                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 634                 } else {
 635                         # Not a posted form? Start with nothing.
 636                         wfDebug( "$fname: Not a posted form.\n" );
 637                         $this->textbox1  = '';
 638                         $this->textbox2  = '';
 639                         $this->mMetaData = '';
 640                         $this->summary   = '';
 641                         $this->edittime  = '';
 642                         $this->starttime = wfTimestampNow();
 643                         $this->edit      = false;
 644                         $this->preview   = false;
 645                         $this->save      = false;
 646                         $this->diff      = false;
 647                         $this->minoredit = false;
 648                         $this->watchthis = false;
 649                         $this->recreate  = false;
 650
 651                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 652                                 $this->summary = $request->getVal( 'preloadtitle' );
 653                         }
 654                 }
 655
 656                 $this->oldid = $request->getInt( 'oldid' );
 657
 658                 $this->live = $request->getCheck( 'live' );
 659                 $this->editintro = $request->getText( 'editintro' );
 660
 661                 wfProfileOut( $fname );
 662         }
 663
 664         /**
 665          * Make sure the form isn't faking a user's credentials.
 666          *
 667          * @param $request WebRequest
 668          * @return bool
 669          * @private
 670          */
 671         function tokenOk( &$request ) {
 672                 global $wgUser;
 673                 $token = $request->getVal( 'wpEditToken' );
 674                 $this->mTokenOk = $wgUser->matchEditToken( $token );
 675                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
 676                 return $this->mTokenOk;
 677         }
 678
 679         /**
 680          * Show all applicable editing introductions
 681          */
 682         protected function showIntro() {
 683                 global $wgOut, $wgUser;
 684                 if ( $this->suppressIntro ) {
 685                         return;
 686                 }
 687                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exists
 688                 if ( $this->mTitle->getNamespace() == NS_USER || $this->mTitle->getNamespace() == NS_USER_TALK ) {
 689                         $parts = explode( '/', $this->mTitle->getText(), 2 );
 690                         $username = $parts[0];
 691                         $id = User::idFromName( $username );
 692                         $ip = User::isIP( $username );
 693                         if ( $id == 0 && !$ip ) {
 694                                 $wgOut->wrapWikiMsg( '<div class="mw-userpage-userdoesnotexist error">$1</div>',
 695                                         array( 'userpage-userdoesnotexist', $username ) );
 696                         }
 697                 }
 698                 # Try to add a custom edit intro, or use the standard one if this is not possible.
 699                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
 700                         if ( $wgUser->isLoggedIn() ) {
 701                                 $wgOut->wrapWikiMsg( '<div class="mw-newarticletext">$1</div>', 'newarticletext' );
 702                         } else {
 703                                 $wgOut->wrapWikiMsg( '<div class="mw-newarticletextanon">$1</div>', 'newarticletextanon' );
 704                         }
 705                 }
 706                 # Give a notice if the user is editing a deleted page...
 707                 if ( !$this->mTitle->exists() ) {
 708                         $this->showDeletionLog( $wgOut );
 709                 }
 710         }
 711
 712         /**
 713          * Attempt to show a custom editing introduction, if supplied
 714          *
 715          * @return bool
 716          */
 717         protected function showCustomIntro() {
 718                 if ( $this->editintro ) {
 719                         $title = Title::newFromText( $this->editintro );
 720                         if ( $title instanceof Title && $title->exists() && $title->userCanRead() ) {
 721                                 global $wgOut;
 722                                 $revision = Revision::newFromTitle( $title );
 723                                 $wgOut->addWikiTextTitleTidy( $revision->getText(), $this->mTitle );
 724                                 return true;
 725                         } else {
 726                                 return false;
 727                         }
 728                 } else {
 729                         return false;
 730                 }
 731         }
 732
 733         /**
 734          * Attempt submission (no UI)
 735          * @return one of the constants describing the result
 736          */
 737         function internalAttemptSave( &$result, $bot = false ) {
 738                 global $wgFilterCallback, $wgUser, $wgOut, $wgParser;
 739                 global $wgMaxArticleSize;
 740
 741                 $fname = 'EditPage::attemptSave';
 742                 wfProfileIn( $fname );
 743                 wfProfileIn( "$fname-checks" );
 744
 745                 if ( !wfRunHooks( 'EditPage::attemptSave', array( &$this ) ) )
 746                 {
 747                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving" );
 748                         return self::AS_HOOK_ERROR;
 749                 }
 750
 751                 # Check image redirect
 752                 if ( $this->mTitle->getNamespace() == NS_IMAGE &&
 753                         Title::newFromRedirect( $this->textbox1 ) instanceof Title &&
 754                         !$wgUser->isAllowed( 'upload' ) ) {
 755                                 if ( $wgUser->isAnon() ) {
 756                                         return self::AS_IMAGE_REDIRECT_ANON;
 757                                 } else {
 758                                         return self::AS_IMAGE_REDIRECT_LOGGED;
 759                                 }
 760                 }
 761
 762                 # Reintegrate metadata
 763                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 764                 $this->mMetaData = '' ;
 765
 766                 # Check for spam
 767                 $match = self::matchSpamRegex( $this->summary );
 768                 if ( $match === false ) {
 769                         $match = self::matchSpamRegex( $this->textbox1 );
 770                 }
 771                 if ( $match !== false ) {
 772                         $result['spam'] = $match;
 773                         $ip = wfGetIP();
 774                         $pdbk = $this->mTitle->getPrefixedDBkey();
 775                         $match = str_replace( "\n", '', $match );
 776                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
 777                         wfProfileOut( "$fname-checks" );
 778                         wfProfileOut( $fname );
 779                         return self::AS_SPAM_ERROR;
 780                 }
 781                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
 782                         # Error messages or other handling should be performed by the filter function
 783                         wfProfileOut( "$fname-checks" );
 784                         wfProfileOut( $fname );
 785                         return self::AS_FILTERING;
 786                 }
 787                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
 788                         # Error messages etc. could be handled within the hook...
 789                         wfProfileOut( "$fname-checks" );
 790                         wfProfileOut( $fname );
 791                         return self::AS_HOOK_ERROR;
 792                 } elseif ( $this->hookError != '' ) {
 793                         # ...or the hook could be expecting us to produce an error
 794                         wfProfileOut( "$fname-checks" );
 795                         wfProfileOut( $fname );
 796                         return self::AS_HOOK_ERROR_EXPECTED;
 797                 }
 798                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 799                         # Check block state against master, thus 'false'.
 800                         wfProfileOut( "$fname-checks" );
 801                         wfProfileOut( $fname );
 802                         return self::AS_BLOCKED_PAGE_FOR_USER;
 803                 }
 804                 $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 805                 if ( $this->kblength > $wgMaxArticleSize ) {
 806                         // Error will be displayed by showEditForm()
 807                         $this->tooBig = true;
 808                         wfProfileOut( "$fname-checks" );
 809                         wfProfileOut( $fname );
 810                         return self::AS_CONTENT_TOO_BIG;
 811                 }
 812
 813                 if ( !$wgUser->isAllowed('edit') ) {
 814                         if ( $wgUser->isAnon() ) {
 815                                 wfProfileOut( "$fname-checks" );
 816                                 wfProfileOut( $fname );
 817                                 return self::AS_READ_ONLY_PAGE_ANON;
 818                         }
 819                         else {
 820                                 wfProfileOut( "$fname-checks" );
 821                                 wfProfileOut( $fname );
 822                                 return self::AS_READ_ONLY_PAGE_LOGGED;
 823                         }
 824                 }
 825
 826                 if ( wfReadOnly() ) {
 827                         wfProfileOut( "$fname-checks" );
 828                         wfProfileOut( $fname );
 829                         return self::AS_READ_ONLY_PAGE;
 830                 }
 831                 if ( $wgUser->pingLimiter() ) {
 832                         wfProfileOut( "$fname-checks" );
 833                         wfProfileOut( $fname );
 834                         return self::AS_RATE_LIMITED;
 835                 }
 836
 837                 # If the article has been deleted while editing, don't save it without
 838                 # confirmation
 839                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
 840                         wfProfileOut( "$fname-checks" );
 841                         wfProfileOut( $fname );
 842                         return self::AS_ARTICLE_WAS_DELETED;
 843                 }
 844
 845                 wfProfileOut( "$fname-checks" );
 846
 847                 # If article is new, insert it.
 848                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 849                 if ( 0 == $aid ) {
 850
 851                         // Late check for create permission, just in case *PARANOIA*
 852                         if ( !$this->mTitle->userCan( 'create' ) ) {
 853                                 wfDebug( "$fname: no create permission\n" );
 854                                 wfProfileOut( $fname );
 855                                 return self::AS_NO_CREATE_PERMISSION;
 856                         }
 857
 858                         # Don't save a new article if it's blank.
 859                         if ( '' == $this->textbox1 ) {
 860                                         wfProfileOut( $fname );
 861                                         return self::AS_BLANK_ARTICLE;
 862                         }
 863
 864                         // Run post-section-merge edit filter
 865                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
 866                                 # Error messages etc. could be handled within the hook...
 867                                 wfProfileOut( $fname );
 868                                 return self::AS_HOOK_ERROR;
 869                         }
 870
 871                         $isComment = ( $this->section == 'new' );
 872
 873                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 874                                 $this->minoredit, $this->watchthis, false, $isComment, $bot);
 875
 876                         wfProfileOut( $fname );
 877                         return self::AS_SUCCESS_NEW_ARTICLE;
 878                 }
 879
 880                 # Article exists. Check for edit conflict.
 881
 882                 $this->mArticle->clear(); # Force reload of dates, etc.
 883                 $this->mArticle->forUpdate( true ); # Lock the article
 884
 885                 wfDebug("timestamp: {$this->mArticle->getTimestamp()}, edittime: {$this->edittime}\n");
 886
 887                 if ( $this->mArticle->getTimestamp() != $this->edittime ) {
 888                         $this->isConflict = true;
 889                         if ( $this->section == 'new' ) {
 890                                 if ( $this->mArticle->getUserText() == $wgUser->getName() &&
 891                                         $this->mArticle->getComment() == $this->summary ) {
 892                                         // Probably a duplicate submission of a new comment.
 893                                         // This can happen when squid resends a request after
 894                                         // a timeout but the first one actually went through.
 895                                         wfDebug( "EditPage::editForm duplicate new section submission; trigger edit conflict!\n" );
 896                                 } else {
 897                                         // New comment; suppress conflict.
 898                                         $this->isConflict = false;
 899                                         wfDebug( "EditPage::editForm conflict suppressed; new section\n" );
 900                                 }
 901                         }
 902                 }
 903                 $userid = $wgUser->getId();
 904
 905                 if ( $this->isConflict ) {
 906                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 907                                 $this->mArticle->getTimestamp() . "')\n" );
 908                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime);
 909                 }
 910                 else {
 911                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 912                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary);
 913                 }
 914                 if ( is_null( $text ) ) {
 915                         wfDebug( "EditPage::editForm activating conflict; section replace failed.\n" );
 916                         $this->isConflict = true;
 917                         $text = $this->textbox1;
 918                 }
 919
 920                 # Suppress edit conflict with self, except for section edits where merging is required.
 921                 if ( ( $this->section == '' ) && ( 0 != $userid ) && ( $this->mArticle->getUser() == $userid ) ) {
 922                         wfDebug( "EditPage::editForm Suppressing edit conflict, same user.\n" );
 923                         $this->isConflict = false;
 924                 } else {
 925                         # switch from section editing to normal editing in edit conflict
 926                         if ( $this->isConflict ) {
 927                                 # Attempt merge
 928                                 if ( $this->mergeChangesInto( $text ) ) {
 929                                         // Successful merge! Maybe we should tell the user the good news?
 930                                         $this->isConflict = false;
 931                                         wfDebug( "EditPage::editForm Suppressing edit conflict, successful merge.\n" );
 932                                 } else {
 933                                         $this->section = '';
 934                                         $this->textbox1 = $text;
 935                                         wfDebug( "EditPage::editForm Keeping edit conflict, failed merge.\n" );
 936                                 }
 937                         }
 938                 }
 939
 940                 if ( $this->isConflict ) {
 941                         wfProfileOut( $fname );
 942                         return self::AS_CONFLICT_DETECTED;
 943                 }
 944
 945                 $oldtext = $this->mArticle->getContent();
 946
 947                 // Run post-section-merge edit filter
 948                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$this->hookError, $this->summary ) ) ) {
 949                         # Error messages etc. could be handled within the hook...
 950                         wfProfileOut( $fname );
 951                         return self::AS_HOOK_ERROR;
 952                 }
 953
 954                 # Handle the user preference to force summaries here, but not for null edits
 955                 if ( $this->section != 'new' && !$this->allowBlankSummary && 0 != strcmp($oldtext, $text) &&
 956                         !is_object( Title::newFromRedirect( $text ) ) # check if it's not a redirect
 957                 ) {
 958                         if ( md5( $this->summary ) == $this->autoSumm ) {
 959                                 $this->missingSummary = true;
 960                                 wfProfileOut( $fname );
 961                                 return self::AS_SUMMARY_NEEDED;
 962                         }
 963                 }
 964
 965                 # And a similar thing for new sections
 966                 if ( $this->section == 'new' && !$this->allowBlankSummary ) {
 967                         if (trim($this->summary) == '') {
 968                                 $this->missingSummary = true;
 969                                 wfProfileOut( $fname );
 970                                 return self::AS_SUMMARY_NEEDED;
 971                         }
 972                 }
 973
 974                 # All's well
 975                 wfProfileIn( "$fname-sectionanchor" );
 976                 $sectionanchor = '';
 977                 if ( $this->section == 'new' ) {
 978                         if ( $this->textbox1 == '' ) {
 979                                 $this->missingComment = true;
 980                                 return self::AS_TEXTBOX_EMPTY;
 981                         }
 982                         if ( $this->summary != '' ) {
 983                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $this->summary );
 984                                 # This is a new section, so create a link to the new section
 985                                 # in the revision summary.
 986                                 $cleanSummary = $wgParser->stripSectionName( $this->summary );
 987                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
 988                         }
 989                 } elseif ( $this->section != '' ) {
 990                         # Try to get a section anchor from the section source, redirect to edited section if header found
 991                         # XXX: might be better to integrate this into Article::replaceSection
 992                         # for duplicate heading checking and maybe parsing
 993                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 994                         # we can't deal with anchors, includes, html etc in the header for now,
 995                         # headline would need to be parsed to improve this
 996                         if ( $hasmatch and strlen($matches[2]) > 0 ) {
 997                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $matches[2] );
 998                         }
 999                 }
1000                 wfProfileOut( "$fname-sectionanchor" );
1001
1002                 // Save errors may fall down to the edit form, but we've now
1003                 // merged the section into full text. Clear the section field
1004                 // so that later submission of conflict forms won't try to
1005                 // replace that into a duplicated mess.
1006                 $this->textbox1 = $text;
1007                 $this->section = '';
1008
1009                 // Check for length errors again now that the section is merged in
1010                 $this->kblength = (int)(strlen( $text ) / 1024);
1011                 if ( $this->kblength > $wgMaxArticleSize ) {
1012                         $this->tooBig = true;
1013                         wfProfileOut( $fname );
1014                         return self::AS_MAX_ARTICLE_SIZE_EXCEEDED;
1015                 }
1016
1017                 # update the article here
1018                 if ( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
1019                         $this->watchthis, $bot, $sectionanchor ) ) {
1020                         wfProfileOut( $fname );
1021                         return self::AS_SUCCESS_UPDATE;
1022                 } else {
1023                         $this->isConflict = true;
1024                 }
1025                 wfProfileOut( $fname );
1026                 return self::AS_END;
1027         }
1028
1029         /**
1030          * Check given input text against $wgSpamRegex, and return the text of the first match.
1031          * @return mixed -- matching string or false
1032          */
1033         public static function matchSpamRegex( $text ) {
1034                 global $wgSpamRegex;
1035                 if ( $wgSpamRegex ) {
1036                         // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1037                         $regexes = (array)$wgSpamRegex;
1038                         foreach( $regexes as $regex ) {
1039                                 $matches = array();
1040                                 if ( preg_match( $regex, $text, $matches ) ) {
1041                                         return $matches[0];
1042                                 }
1043                         }
1044                 }
1045                 return false;
1046         }
1047
1048         /**
1049          * Initialise form fields in the object
1050          * Called on the first invocation, e.g. when a user clicks an edit link
1051          */
1052         function initialiseForm() {
1053                 $this->edittime = $this->mArticle->getTimestamp();
1054                 $this->textbox1 = $this->getContent(false);
1055                 if ( $this->textbox1 === false) return false;
1056
1057                 if ( !$this->mArticle->exists() && $this->mTitle->getNamespace() == NS_MEDIAWIKI )
1058                         $this->textbox1 = wfMsgWeirdKey( $this->mTitle->getText() );
1059                 wfProxyCheck();
1060                 return true;
1061         }
1062
1063         function setHeaders() {
1064                 global $wgOut, $wgTitle;
1065                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1066                 if ( $this->formtype == 'preview' ) {
1067                         $wgOut->setPageTitleActionText( wfMsg( 'preview' ) );
1068                 }
1069                 if ( $this->isConflict ) {
1070                         $wgOut->setPageTitle( wfMsg( 'editconflict', $wgTitle->getPrefixedText() ) );
1071                 } elseif ( $this->section != '' ) {
1072                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1073                         $wgOut->setPageTitle( wfMsg( $msg, $wgTitle->getPrefixedText() ) );
1074                 } else {
1075                         # Use the title defined by DISPLAYTITLE magic word when present
1076                         if ( isset($this->mParserOutput)
1077                          && ( $dt = $this->mParserOutput->getDisplayTitle() ) !== false ) {
1078                                 $title = $dt;
1079                         } else {
1080                                 $title = $wgTitle->getPrefixedText();
1081                         }
1082                         $wgOut->setPageTitle( wfMsg( 'editing', $title ) );
1083                 }
1084         }
1085
1086         /**
1087          * Send the edit form and related headers to $wgOut
1088          * @param $formCallback Optional callable that takes an OutputPage
1089          *                      parameter; will be called during form output
1090          *                      near the top, for captchas and the like.
1091          */
1092         function showEditForm( $formCallback=null ) {
1093                 global $wgOut, $wgUser, $wgLang, $wgContLang, $wgMaxArticleSize, $wgTitle;
1094
1095                 # If $wgTitle is null, that means we're in API mode.
1096                 # Some hook probably called this function  without checking
1097                 # for is_null($wgTitle) first. Bail out right here so we don't
1098                 # do lots of work just to discard it right after.
1099                 if (is_null($wgTitle))
1100                         return;
1101
1102                 $fname = 'EditPage::showEditForm';
1103                 wfProfileIn( $fname );
1104
1105                 $sk = $wgUser->getSkin();
1106
1107                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) ) ;
1108
1109                 #need to parse the preview early so that we know which templates are used,
1110                 #otherwise users with "show preview after edit box" will get a blank list
1111                 #we parse this near the beginning so that setHeaders can do the title
1112                 #setting work instead of leaving it in getPreviewText
1113                 $previewOutput = '';
1114                 if ( $this->formtype == 'preview' ) {
1115                         $previewOutput = $this->getPreviewText();
1116                 }
1117
1118                 $this->setHeaders();
1119
1120                 # Enabled article-related sidebar, toplinks, etc.
1121                 $wgOut->setArticleRelated( true );
1122
1123                 if ( $this->isConflict ) {
1124                         $wgOut->addWikiMsg( 'explainconflict' );
1125
1126                         $this->textbox2 = $this->textbox1;
1127                         $this->textbox1 = $this->getContent();
1128                         $this->edittime = $this->mArticle->getTimestamp();
1129                 } else {
1130                         if ( $this->section != '' && $this->section != 'new' ) {
1131                                 $matches = array();
1132                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
1133                                         preg_match( "/^(=+)(.+)\\1/mi",
1134                                                 $this->textbox1,
1135                                                 $matches );
1136                                         if ( !empty( $matches[2] ) ) {
1137                                                 global $wgParser;
1138                                                 $this->summary = "/* " .
1139                                                         $wgParser->stripSectionName(trim($matches[2])) .
1140                                                         " */ ";
1141                                         }
1142                                 }
1143                         }
1144
1145                         if ( $this->missingComment ) {
1146                                 $wgOut->wrapWikiMsg( '<div id="mw-missingcommenttext">$1</div>',  'missingcommenttext' );
1147                         }
1148
1149                         if ( $this->missingSummary && $this->section != 'new' ) {
1150                                 $wgOut->wrapWikiMsg( '<div id="mw-missingsummary">$1</div>', 'missingsummary' );
1151                         }
1152
1153                         if ( $this->missingSummary && $this->section == 'new' ) {
1154                                 $wgOut->wrapWikiMsg( '<div id="mw-missingcommentheader">$1</div>', 'missingcommentheader' );
1155                         }
1156
1157                         if ( $this->hookError !== '' ) {
1158                                 $wgOut->addWikiText( $this->hookError );
1159                         }
1160
1161                         if ( !$this->checkUnicodeCompliantBrowser() ) {
1162                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
1163                         }
1164                         if ( isset( $this->mArticle ) && isset( $this->mArticle->mRevision ) ) {
1165                         // Let sysop know that this will make private content public if saved
1166
1167                                 if ( !$this->mArticle->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1168                                         $wgOut->addWikiMsg( 'rev-deleted-text-permission' );
1169                                 } else if ( $this->mArticle->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1170                                         $wgOut->addWikiMsg( 'rev-deleted-text-view' );
1171                                 }
1172
1173                                 if ( !$this->mArticle->mRevision->isCurrent() ) {
1174                                         $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
1175                                         $wgOut->addWikiMsg( 'editingold' );
1176                                 }
1177                         }
1178                 }
1179
1180                 if ( wfReadOnly() ) {
1181                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
1182                 } elseif ( $wgUser->isAnon() && $this->formtype != 'preview' ) {
1183                         $wgOut->wrapWikiMsg( '<div id="mw-anon-edit-warning">$1</div>', 'anoneditwarning' );
1184                 } else {
1185                         if ( $this->isCssJsSubpage && $this->formtype != 'preview' ) {
1186                                 # Check the skin exists
1187                                 if ( $this->isValidCssJsSubpage ) {
1188                                         $wgOut->addWikiMsg( 'usercssjsyoucanpreview' );
1189                                 } else {
1190                                         $wgOut->addWikiMsg( 'userinvalidcssjstitle', $wgTitle->getSkinFromCssJsSubpage() );
1191                                 }
1192                         }
1193                 }
1194
1195                 $classes = array(); // Textarea CSS
1196                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1197                         # Show a warning if editing an interface message
1198                         $wgOut->addWikiMsg( 'editinginterface' );
1199                 } elseif ( $this->mTitle->isProtected( 'edit' ) ) {
1200                         # Is the title semi-protected?
1201                         if ( $this->mTitle->isSemiProtected() ) {
1202                                 $noticeMsg = 'semiprotectedpagewarning';
1203                                 $classes[] = 'mw-textarea-sprotected';
1204                         } else {
1205                                 # Then it must be protected based on static groups (regular)
1206                                 $noticeMsg = 'protectedpagewarning';
1207                                 $classes[] = 'mw-textarea-protected';
1208                         }
1209                         $wgOut->addHTML( "<div id='mw-edit-$noticeMsg'>\n" );
1210                         $wgOut->addWikiMsg( $noticeMsg );
1211                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle->getPrefixedText(), '', 1 );
1212                         $wgOut->addHTML( "</div>\n" );
1213                 }
1214                 if ( $this->mTitle->isCascadeProtected() ) {
1215                         # Is this page under cascading protection from some source pages?
1216                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
1217                         $notice = "$1\n";
1218                         if ( count($cascadeSources) > 0 ) {
1219                                 # Explain, and list the titles responsible
1220                                 foreach( $cascadeSources as $page ) {
1221                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
1222                                 }
1223                         }
1224                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', count($cascadeSources) ) );
1225                 }
1226                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
1227                         $wgOut->addWikiMsg( 'titleprotectedwarning' );
1228                 }
1229
1230                 if ( $this->kblength === false ) {
1231                         $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
1232                 }
1233                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
1234                         $wgOut->addHTML( "<div id='mw-edit-longpageerror'>\n" );
1235                         $wgOut->addWikiMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) );
1236                         $wgOut->addHTML( "</div>\n" );
1237                 } elseif ( $this->kblength > 29 ) {
1238                         $wgOut->addHTML( "<div id='mw-edit-longpagewarning'>\n" );
1239                         $wgOut->addWikiMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) );
1240                         $wgOut->addHTML( "</div>\n" );
1241                 }
1242
1243                 $q = 'action='.$this->action;
1244                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
1245                 $action = $wgTitle->escapeLocalURL( $q );
1246
1247                 $colonSep = wfMsg( 'colon-separator' );
1248                 $summary = wfMsg( 'summary' ) . $colonSep;
1249                 $subject = wfMsg( 'subject' ) . $colonSep;
1250
1251                 $cancel = $sk->makeKnownLink( $wgTitle->getPrefixedText(),
1252                                 wfMsgExt('cancel', array('parseinline')) );
1253                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ));
1254                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
1255                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
1256                         htmlspecialchars( wfMsg( 'newwindow' ) );
1257
1258                 global $wgRightsText;
1259                 if ( $wgRightsText ) {
1260                         $copywarnMsg = array( 'copyrightwarning',
1261                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
1262                                 $wgRightsText );
1263                 } else {
1264                         $copywarnMsg = array( 'copyrightwarning2',
1265                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
1266                 }
1267
1268                 if ( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
1269                         # prepare toolbar for edit buttons
1270                         $toolbar = EditPage::getEditToolbar();
1271                 } else {
1272                         $toolbar = '';
1273                 }
1274
1275                 // activate checkboxes if user wants them to be always active
1276                 if ( !$this->preview && !$this->diff ) {
1277                         # Sort out the "watch" checkbox
1278                         if ( $wgUser->getOption( 'watchdefault' ) ) {
1279                                 # Watch all edits
1280                                 $this->watchthis = true;
1281                         } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1282                                 # Watch creations
1283                                 $this->watchthis = true;
1284                         } elseif ( $this->mTitle->userIsWatching() ) {
1285                                 # Already watched
1286                                 $this->watchthis = true;
1287                         }
1288
1289                         if ( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
1290                 }
1291
1292                 $wgOut->addHTML( $this->editFormPageTop );
1293
1294                 if ( $wgUser->getOption( 'previewontop' ) ) {
1295                         $this->displayPreviewArea( $previewOutput, true );
1296                 }
1297
1298
1299                 $wgOut->addHTML( $this->editFormTextTop );
1300
1301                 # if this is a comment, show a subject line at the top, which is also the edit summary.
1302                 # Otherwise, show a summary field at the bottom
1303                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
1304
1305                 # If a blank edit summary was previously provided, and the appropriate
1306                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1307                 # user being bounced back more than once in the event that a summary
1308                 # is not required.
1309                 #####
1310                 # For a bit more sophisticated detection of blank summaries, hash the
1311                 # automatic one and pass that in the hidden field wpAutoSummary.
1312                 $summaryhiddens =  '';
1313                 if ( $this->missingSummary ) $summaryhiddens .= Xml::hidden( 'wpIgnoreBlankSummary', true );
1314                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1315                 $summaryhiddens .= Xml::hidden( 'wpAutoSummary', $autosumm );
1316                 if ( $this->section == 'new' ) {
1317                         $commentsubject="<span id='wpSummaryLabel'><label for='wpSummary'>{$subject}</label></span>\n<input tabindex='1' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' />{$summaryhiddens}<br />";
1318                         $editsummary = "<div class='editOptions'>\n";
1319                         global $wgParser;
1320                         $formattedSummary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $this->summary ) );
1321                         $subjectpreview = $summarytext && $this->preview ? "<div class=\"mw-summary-preview\">".wfMsg('subject-preview').$colonSep.$sk->commentBlock( $formattedSummary, $this->mTitle, true )."</div>\n" : '';
1322                         $summarypreview = '';
1323                 } else {
1324                         $commentsubject = '';
1325                         $editsummary="<div class='editOptions'>\n<span id='wpSummaryLabel'><label for='wpSummary'>{$summary}</label></span>\n<input tabindex='2' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' />{$summaryhiddens}<br />";
1326                         $summarypreview = $summarytext && $this->preview ? "<div class=\"mw-summary-preview\">".wfMsg('summary-preview').$colonSep.$sk->commentBlock( $this->summary, $this->mTitle )."</div>\n" : '';
1327                         $subjectpreview = '';
1328                 }
1329
1330                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
1331                 if ( !$this->preview && !$this->diff ) {
1332                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
1333                 }
1334                 $templates = $this->getTemplates();
1335                 $formattedtemplates = $sk->formatTemplates( $templates, $this->preview, $this->section != '');
1336
1337                 $hiddencats = $this->mArticle->getHiddenCategories();
1338                 $formattedhiddencats = $sk->formatHiddenCategories( $hiddencats );
1339
1340                 global $wgUseMetadataEdit ;
1341                 if ( $wgUseMetadataEdit ) {
1342                         $metadata = $this->mMetaData ;
1343                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
1344                         $top = wfMsgWikiHtml( 'metadata_help' );
1345                         /* ToDo: Replace with clean code */
1346                         $ew = $wgUser->getOption( 'editwidth' );
1347                         if ( $ew ) $ew = " style=\"width:100%\"";
1348                         else $ew = '';
1349                         /* /ToDo */
1350                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
1351                 }
1352                 else $metadata = "" ;
1353
1354                 $recreate = '';
1355                 if ( $this->wasDeletedSinceLastEdit() ) {
1356                         if ( 'save' != $this->formtype ) {
1357                                 $wgOut->addWikiMsg('deletedwhileediting');
1358                         } else {
1359                                 // Hide the toolbar and edit area, use can click preview to get it back
1360                                 // Add an confirmation checkbox and explanation.
1361                                 $toolbar = '';
1362                                 $recreate = $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ));
1363                                 $recreate .=
1364                                         "<br /><input tabindex='1' type='checkbox' value='1' name='wpRecreate' id='wpRecreate' />".
1365                                         "<label for='wpRecreate' title='".wfMsg('tooltip-recreate')."'>". wfMsg('recreate')."</label>";
1366                         }
1367                 }
1368
1369                 $tabindex = 2;
1370
1371                 $checkboxes = self::getCheckboxes( $tabindex, $sk,
1372                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
1373
1374                 $checkboxhtml = implode( $checkboxes, "\n" );
1375
1376                 $buttons = $this->getEditButtons( $tabindex );
1377                 $buttonshtml = implode( $buttons, "\n" );
1378
1379                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
1380                         ? '' : Xml::hidden( 'safemode', '1' );
1381
1382                 $wgOut->addHTML( <<<END
1383 {$toolbar}
1384 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1385 END
1386 );
1387
1388                 if ( is_callable( $formCallback ) ) {
1389                         call_user_func_array( $formCallback, array( &$wgOut ) );
1390                 }
1391
1392                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1393
1394                 // Put these up at the top to ensure they aren't lost on early form submission
1395                 $this->showFormBeforeText();
1396
1397                 $wgOut->addHTML( <<<END
1398 {$recreate}
1399 {$commentsubject}
1400 {$subjectpreview}
1401 {$this->editFormTextBeforeContent}
1402 END
1403 );
1404                 $this->showTextbox1( $classes );
1405
1406                 $wgOut->wrapWikiMsg( "<div id=\"editpage-copywarn\">\n$1\n</div>", $copywarnMsg );
1407                 $wgOut->addHTML( <<<END
1408 {$this->editFormTextAfterWarn}
1409 {$metadata}
1410 {$editsummary}
1411 {$summarypreview}
1412 {$checkboxhtml}
1413 {$safemodehtml}
1414 END
1415 );
1416
1417                 $wgOut->addHTML(
1418 "<div class='editButtons'>
1419 {$buttonshtml}
1420         <span class='editHelp'>{$cancel} | {$edithelp}</span>
1421 </div><!-- editButtons -->
1422 </div><!-- editOptions -->");
1423
1424                 /**
1425                  * To make it harder for someone to slip a user a page
1426                  * which submits an edit form to the wiki without their
1427                  * knowledge, a random token is associated with the login
1428                  * session. If it's not passed back with the submission,
1429                  * we won't save the page, or render user JavaScript and
1430                  * CSS previews.
1431                  *
1432                  * For anon editors, who may not have a session, we just
1433                  * include the constant suffix to prevent editing from
1434                  * broken text-mangling proxies.
1435                  */
1436                 $token = htmlspecialchars( $wgUser->editToken() );
1437                 $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
1438
1439                 $this->showEditTools();
1440
1441                 $wgOut->addHTML( <<<END
1442 {$this->editFormTextAfterTools}
1443 <div class='templatesUsed'>
1444 {$formattedtemplates}
1445 </div>
1446 <div class='hiddencats'>
1447 {$formattedhiddencats}
1448 </div>
1449 END
1450 );
1451
1452                 if ( $this->isConflict && wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
1453                         $wgOut->wrapWikiMsg( '==$1==', "yourdiff" );
1454
1455                         $de = new DifferenceEngine( $this->mTitle );
1456                         $de->setText( $this->textbox2, $this->textbox1 );
1457                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1458
1459                         $wgOut->wrapWikiMsg( '==$1==', "yourtext" );
1460                         $this->showTextbox2();
1461                 }
1462                 $wgOut->addHTML( $this->editFormTextBottom );
1463                 $wgOut->addHTML( "</form>\n" );
1464                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1465                         $this->displayPreviewArea( $previewOutput, false );
1466                 }
1467
1468                 wfProfileOut( $fname );
1469         }
1470
1471         protected function showFormBeforeText() {
1472                 global $wgOut;
1473                 $wgOut->addHTML( "
1474 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
1475 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
1476 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
1477 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
1478         }
1479
1480         protected function showTextbox1( $classes ) {
1481                 $attribs = array( 'tabindex' => 1 );
1482
1483                 if ( $this->wasDeletedSinceLastEdit() )
1484                         $attribs['type'] = 'hidden';
1485                 if ( !empty($classes) )
1486                         $attribs['class'] = implode(' ',$classes);
1487
1488                 $this->showTextbox( $this->textbox1, 'wpTextbox1', $attribs );
1489         }
1490
1491         protected function showTextbox2() {
1492                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6 ) );
1493         }
1494
1495         protected function showTextbox( $content, $name, $attribs = array() ) {
1496                 global $wgOut, $wgUser;
1497
1498                 $wikitext = $this->safeUnicodeOutput( $content );
1499                 if ( $wikitext !== '' ) {
1500                         // Ensure there's a newline at the end, otherwise adding lines
1501                         // is awkward.
1502                         // But don't add a newline if the ext is empty, or Firefox in XHTML
1503                         // mode will show an extra newline. A bit annoying.
1504                         $wikitext .= "\n";
1505                 }
1506
1507                 $attribs['accesskey'] = ',';
1508                 $attribs['id'] = $name;
1509
1510                 if ( $wgUser->getOption( 'editwidth' ) )
1511                         $attribs['style'] = 'width: 100%';
1512
1513                 $wgOut->addHTML( Xml::textarea(
1514                         $name,
1515                         $wikitext,
1516                         $wgUser->getIntOption( 'cols' ), $wgUser->getIntOption( 'rows' ),
1517                         $attribs ) );
1518         }
1519
1520         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
1521                 global $wgOut;
1522                 $classes = array();
1523                 if ( $isOnTop )
1524                         $classes[] = 'ontop';
1525
1526                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
1527
1528                 if ( $this->formtype != 'preview' )
1529                         $attribs['style'] = 'display: none;';
1530
1531                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
1532
1533                 if ( $this->formtype == 'preview' ) {
1534                         $this->showPreview( $previewOutput );
1535                 }
1536
1537                 $wgOut->addHTML( '</div>' );
1538
1539                 if ( $this->formtype == 'diff') {
1540                         $this->showDiff();
1541                 }
1542         }
1543
1544         /**
1545          * Append preview output to $wgOut.
1546          * Includes category rendering if this is a category page.
1547          *
1548          * @param string $text The HTML to be output for the preview.
1549          */
1550         protected function showPreview( $text ) {
1551                 global $wgOut;
1552                 if ( $this->mTitle->getNamespace() == NS_CATEGORY) {
1553                         $this->mArticle->openShowCategory();
1554                 }
1555                 # This hook seems slightly odd here, but makes things more
1556                 # consistent for extensions.
1557                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
1558                 $wgOut->addHTML( $text );
1559                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
1560                         $this->mArticle->closeShowCategory();
1561                 }
1562         }
1563
1564         /**
1565          * Live Preview lets us fetch rendered preview page content and
1566          * add it to the page without refreshing the whole page.
1567          * If not supported by the browser it will fall through to the normal form
1568          * submission method.
1569          *
1570          * This function outputs a script tag to support live preview, and
1571          * returns an onclick handler which should be added to the attributes
1572          * of the preview button
1573          */
1574         function doLivePreviewScript() {
1575                 global $wgOut, $wgTitle;
1576                 $wgOut->addScriptFile( 'preview.js' );
1577                 $liveAction = $wgTitle->getLocalUrl( "action={$this->action}&wpPreview=true&live=true" );
1578                 return "return !lpDoPreview(" .
1579                         "editform.wpTextbox1.value," .
1580                         '"' . $liveAction . '"' . ")";
1581         }
1582
1583         protected function showEditTools() {
1584                 global $wgOut;
1585                 $wgOut->addHtml( '<div class="mw-editTools">' );
1586                 $wgOut->addWikiMsgArray( 'edittools', array(), array( 'content' ) );
1587                 $wgOut->addHtml( '</div>' );
1588         }
1589
1590         function getLastDelete() {
1591                 $dbr = wfGetDB( DB_SLAVE );
1592                 $data = $dbr->selectRow(
1593                         array( 'logging', 'user' ),
1594                         array( 'log_type',
1595                                'log_action',
1596                                'log_timestamp',
1597                                'log_user',
1598                                'log_namespace',
1599                                'log_title',
1600                                'log_comment',
1601                                'log_params',
1602                                'user_name', ),
1603                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1604                                'log_title' => $this->mTitle->getDBkey(),
1605                                'log_type' => 'delete',
1606                                'log_action' => 'delete',
1607                                'user_id=log_user' ),
1608                         __METHOD__,
1609                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
1610
1611                 return $data;
1612         }
1613
1614         /**
1615          * Get the rendered text for previewing.
1616          * @return string
1617          */
1618         function getPreviewText() {
1619                 global $wgOut, $wgUser, $wgTitle, $wgParser, $wgLang, $wgContLang;
1620
1621                 wfProfileIn( __METHOD__ );
1622
1623                 if ( $this->mTriedSave && !$this->mTokenOk ) {
1624                         if ( $this->mTokenOkExceptSuffix ) {
1625                                 $note = wfMsg( 'token_suffix_mismatch' );
1626                         } else {
1627                                 $note = wfMsg( 'session_fail_preview' );
1628                         }
1629                 } else {
1630                         $note = wfMsg( 'previewnote' );
1631                 }
1632
1633                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1634                 $parserOptions->setEditSection( false );
1635
1636                 global $wgRawHtml;
1637                 if ( $wgRawHtml && !$this->mTokenOk ) {
1638                         // Could be an offsite preview attempt. This is very unsafe if
1639                         // HTML is enabled, as it could be an attack.
1640                         return $wgOut->parse( "<div class='previewnote'>" .
1641                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1642                 }
1643
1644                 # don't parse user css/js, show message about preview
1645                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1646
1647                 if ( $this->isCssJsSubpage ) {
1648                         if (preg_match("/\\.css$/", $this->mTitle->getText() ) ) {
1649                                 $previewtext = wfMsg('usercsspreview');
1650                         } else if (preg_match("/\\.js$/", $this->mTitle->getText() ) ) {
1651                                 $previewtext = wfMsg('userjspreview');
1652                         }
1653                         $parserOptions->setTidy(true);
1654                         $parserOutput = $wgParser->parse( $previewtext , $this->mTitle, $parserOptions );
1655                         //$wgOut->addHTML( $parserOutput->mText );
1656                         $previewHTML = '';
1657                 } elseif ( $rt = Title::newFromRedirect( $this->textbox1 ) ) {
1658                         $previewHTML = $this->mArticle->viewRedirect( $rt, false );
1659                 } else {
1660                         $toparse = $this->textbox1;
1661
1662                         # If we're adding a comment, we need to show the
1663                         # summary as the headline
1664                         if ( $this->section=="new" && $this->summary!="" ) {
1665                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1666                         }
1667
1668                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData;
1669
1670                         // Parse mediawiki messages with correct target language
1671                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1672                                 $pos = strrpos( $this->mTitle->getText(), '/' );
1673                                 if ( $pos !== false ) {
1674                                         $code = substr( $this->mTitle->getText(), $pos+1 );
1675                                         switch ($code) {
1676                                                 case $wgLang->getCode():
1677                                                         $obj = $wgLang; break;
1678                                                 case $wgContLang->getCode():
1679                                                         $obj = $wgContLang; break;
1680                                                 default:
1681                                                         $obj = Language::factory( $code );
1682                                         }
1683                                         $parserOptions->setTargetLanguage( $obj );
1684                                 }
1685                         }
1686
1687
1688                         $parserOptions->setTidy(true);
1689                         $parserOptions->enableLimitReport();
1690                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ),
1691                                         $this->mTitle, $parserOptions );
1692
1693                         $previewHTML = $parserOutput->getText();
1694                         $this->mParserOutput = $parserOutput;
1695                         $wgOut->addParserOutputNoText( $parserOutput );
1696
1697                         if ( count( $parserOutput->getWarnings() ) ) {
1698                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
1699                         }
1700                 }
1701
1702                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
1703                         "<div class='previewnote'>" . $wgOut->parse( $note ) . "</div>\n";
1704                 if ( $this->isConflict ) {
1705                         $previewhead .='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1706                 }
1707
1708                 wfProfileOut( __METHOD__ );
1709                 return $previewhead . $previewHTML;
1710         }
1711
1712         function getTemplates() {
1713                 if ( $this->preview || $this->section != '' ) {
1714                         $templates = array();
1715                         if ( !isset($this->mParserOutput) ) return $templates;
1716                         foreach( $this->mParserOutput->getTemplates() as $ns => $template) {
1717                                 foreach( array_keys( $template ) as $dbk ) {
1718                                         $templates[] = Title::makeTitle($ns, $dbk);
1719                                 }
1720                         }
1721                         return $templates;
1722                 } else {
1723                         return $this->mArticle->getUsedTemplates();
1724                 }
1725         }
1726
1727         /**
1728          * Call the stock "user is blocked" page
1729          */
1730         function blockedPage() {
1731                 global $wgOut, $wgUser;
1732                 $wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
1733
1734                 # If the user made changes, preserve them when showing the markup
1735                 # (This happens when a user is blocked during edit, for instance)
1736                 $first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
1737                 if ( $first ) {
1738                         $source = $this->mTitle->exists() ? $this->getContent() : false;
1739                 } else {
1740                         $source = $this->textbox1;
1741                 }
1742
1743                 # Spit out the source or the user's modified version
1744                 if ( $source !== false ) {
1745                         $rows = $wgUser->getIntOption( 'rows' );
1746                         $cols = $wgUser->getIntOption( 'cols' );
1747                         $attribs = array( 'id' => 'wpTextbox1', 'name' => 'wpTextbox1', 'cols' => $cols, 'rows' => $rows, 'readonly' => 'readonly' );
1748                         $wgOut->addHtml( '<hr />' );
1749                         $wgOut->addWikiMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() );
1750                         # Why we don't use Xml::element here?
1751                         # Is it because if $source is '', it returns <textarea />?
1752                         $wgOut->addHtml( Xml::openElement( 'textarea', $attribs ) . htmlspecialchars( $source ) . Xml::closeElement( 'textarea' ) );
1753                 }
1754         }
1755
1756         /**
1757          * Produce the stock "please login to edit pages" page
1758          */
1759         function userNotLoggedInPage() {
1760                 global $wgUser, $wgOut, $wgTitle;
1761                 $skin = $wgUser->getSkin();
1762
1763                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1764                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $wgTitle->getPrefixedUrl() );
1765
1766                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1767                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1768                 $wgOut->setArticleRelated( false );
1769
1770                 $wgOut->addHtml( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
1771                 $wgOut->returnToMain( false, $wgTitle );
1772         }
1773
1774         /**
1775          * Creates a basic error page which informs the user that
1776          * they have attempted to edit a nonexistant section.
1777          */
1778         function noSuchSectionPage() {
1779                 global $wgOut, $wgTitle;
1780
1781                 $wgOut->setPageTitle( wfMsg( 'nosuchsectiontitle' ) );
1782                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1783                 $wgOut->setArticleRelated( false );
1784
1785                 $wgOut->addWikiMsg( 'nosuchsectiontext', $this->section );
1786                 $wgOut->returnToMain( false, $wgTitle );
1787         }
1788
1789         /**
1790          * Produce the stock "your edit contains spam" page
1791          *
1792          * @param $match Text which triggered one or more filters
1793          */
1794         function spamPage( $match = false ) {
1795                 global $wgOut, $wgTitle;
1796
1797                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1798                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1799                 $wgOut->setArticleRelated( false );
1800
1801                 $wgOut->addHtml( '<div id="spamprotected">' );
1802                 $wgOut->addWikiMsg( 'spamprotectiontext' );
1803                 if ( $match )
1804                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
1805                 $wgOut->addHtml( '</div>' );
1806
1807                 $wgOut->returnToMain( false, $wgTitle );
1808         }
1809
1810         /**
1811          * @private
1812          * @todo document
1813          */
1814         function mergeChangesInto( &$editText ){
1815                 $fname = 'EditPage::mergeChangesInto';
1816                 wfProfileIn( $fname );
1817
1818                 $db = wfGetDB( DB_MASTER );
1819
1820                 // This is the revision the editor started from
1821                 $baseRevision = $this->getBaseRevision();
1822                 if ( is_null( $baseRevision ) ) {
1823                         wfProfileOut( $fname );
1824                         return false;
1825                 }
1826                 $baseText = $baseRevision->getText();
1827
1828                 // The current state, we want to merge updates into it
1829                 $currentRevision =  Revision::loadFromTitle(
1830                         $db, $this->mTitle );
1831                 if ( is_null( $currentRevision ) ) {
1832                         wfProfileOut( $fname );
1833                         return false;
1834                 }
1835                 $currentText = $currentRevision->getText();
1836
1837                 $result = '';
1838                 if ( wfMerge( $baseText, $editText, $currentText, $result ) ) {
1839                         $editText = $result;
1840                         wfProfileOut( $fname );
1841                         return true;
1842                 } else {
1843                         wfProfileOut( $fname );
1844                         return false;
1845                 }
1846         }
1847
1848         /**
1849          * Check if the browser is on a blacklist of user-agents known to
1850          * mangle UTF-8 data on form submission. Returns true if Unicode
1851          * should make it through, false if it's known to be a problem.
1852          * @return bool
1853          * @private
1854          */
1855         function checkUnicodeCompliantBrowser() {
1856                 global $wgBrowserBlackList;
1857                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
1858                         // No User-Agent header sent? Trust it by default...
1859                         return true;
1860                 }
1861                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1862                 foreach ( $wgBrowserBlackList as $browser ) {
1863                         if ( preg_match($browser, $currentbrowser) ) {
1864                                 return false;
1865                         }
1866                 }
1867                 return true;
1868         }
1869
1870         /**
1871          * @deprecated use $wgParser->stripSectionName()
1872          */
1873         function pseudoParseSectionAnchor( $text ) {
1874                 global $wgParser;
1875                 return $wgParser->stripSectionName( $text );
1876         }
1877
1878         /**
1879          * Format an anchor fragment as it would appear for a given section name
1880          * @param string $text
1881          * @return string
1882          * @private
1883          */
1884         function sectionAnchor( $text ) {
1885                 global $wgParser;
1886                 return $wgParser->guessSectionNameFromWikiText( $text );
1887         }
1888
1889         /**
1890          * Shows a bulletin board style toolbar for common editing functions.
1891          * It can be disabled in the user preferences.
1892          * The necessary JavaScript code can be found in skins/common/edit.js.
1893          *
1894          * @return string
1895          */
1896         static function getEditToolbar() {
1897                 global $wgStylePath, $wgContLang, $wgLang, $wgJsMimeType;
1898
1899                 /**
1900                  * toolarray an array of arrays which each include the filename of
1901                  * the button image (without path), the opening tag, the closing tag,
1902                  * and optionally a sample text that is inserted between the two when no
1903                  * selection is highlighted.
1904                  * The tip text is shown when the user moves the mouse over the button.
1905                  *
1906                  * Already here are accesskeys (key), which are not used yet until someone
1907                  * can figure out a way to make them work in IE. However, we should make
1908                  * sure these keys are not defined on the edit page.
1909                  */
1910                 $toolarray = array(
1911                         array(
1912                                 'image'  => $wgLang->getImageFile('button-bold'),
1913                                 'id'     => 'mw-editbutton-bold',
1914                                 'open'   => '\'\'\'',
1915                                 'close'  => '\'\'\'',
1916                                 'sample' => wfMsg('bold_sample'),
1917                                 'tip'    => wfMsg('bold_tip'),
1918                                 'key'    => 'B'
1919                         ),
1920                         array(
1921                                 'image'  => $wgLang->getImageFile('button-italic'),
1922                                 'id'     => 'mw-editbutton-italic',
1923                                 'open'   => '\'\'',
1924                                 'close'  => '\'\'',
1925                                 'sample' => wfMsg('italic_sample'),
1926                                 'tip'    => wfMsg('italic_tip'),
1927                                 'key'    => 'I'
1928                         ),
1929                         array(
1930                                 'image'  => $wgLang->getImageFile('button-link'),
1931                                 'id'     => 'mw-editbutton-link',
1932                                 'open'   => '[[',
1933                                 'close'  => ']]',
1934                                 'sample' => wfMsg('link_sample'),
1935                                 'tip'    => wfMsg('link_tip'),
1936                                 'key'    => 'L'
1937                         ),
1938                         array(
1939                                 'image'  => $wgLang->getImageFile('button-extlink'),
1940                                 'id'     => 'mw-editbutton-extlink',
1941                                 'open'   => '[',
1942                                 'close'  => ']',
1943                                 'sample' => wfMsg('extlink_sample'),
1944                                 'tip'    => wfMsg('extlink_tip'),
1945                                 'key'    => 'X'
1946                         ),
1947                         array(
1948                                 'image'  => $wgLang->getImageFile('button-headline'),
1949                                 'id'     => 'mw-editbutton-headline',
1950                                 'open'   => "\n== ",
1951                                 'close'  => " ==\n",
1952                                 'sample' => wfMsg('headline_sample'),
1953                                 'tip'    => wfMsg('headline_tip'),
1954                                 'key'    => 'H'
1955                         ),
1956                         array(
1957                                 'image'  => $wgLang->getImageFile('button-image'),
1958                                 'id'     => 'mw-editbutton-image',
1959                                 'open'   => '[['.$wgContLang->getNsText(NS_IMAGE).':',
1960                                 'close'  => ']]',
1961                                 'sample' => wfMsg('image_sample'),
1962                                 'tip'    => wfMsg('image_tip'),
1963                                 'key'    => 'D'
1964                         ),
1965                         array(
1966                                 'image'  => $wgLang->getImageFile('button-media'),
1967                                 'id'     => 'mw-editbutton-media',
1968                                 'open'   => '[['.$wgContLang->getNsText(NS_MEDIA).':',
1969                                 'close'  => ']]',
1970                                 'sample' => wfMsg('media_sample'),
1971                                 'tip'    => wfMsg('media_tip'),
1972                                 'key'    => 'M'
1973                         ),
1974                         array(
1975                                 'image'  => $wgLang->getImageFile('button-math'),
1976                                 'id'     => 'mw-editbutton-math',
1977                                 'open'   => "<math>",
1978                                 'close'  => "</math>",
1979                                 'sample' => wfMsg('math_sample'),
1980                                 'tip'    => wfMsg('math_tip'),
1981                                 'key'    => 'C'
1982                         ),
1983                         array(
1984                                 'image'  => $wgLang->getImageFile('button-nowiki'),
1985                                 'id'     => 'mw-editbutton-nowiki',
1986                                 'open'   => "<nowiki>",
1987                                 'close'  => "</nowiki>",
1988                                 'sample' => wfMsg('nowiki_sample'),
1989                                 'tip'    => wfMsg('nowiki_tip'),
1990                                 'key'    => 'N'
1991                         ),
1992                         array(
1993                                 'image'  => $wgLang->getImageFile('button-sig'),
1994                                 'id'     => 'mw-editbutton-signature',
1995                                 'open'   => '--~~~~',
1996                                 'close'  => '',
1997                                 'sample' => '',
1998                                 'tip'    => wfMsg('sig_tip'),
1999                                 'key'    => 'Y'
2000                         ),
2001                         array(
2002                                 'image'  => $wgLang->getImageFile('button-hr'),
2003                                 'id'     => 'mw-editbutton-hr',
2004                                 'open'   => "\n----\n",
2005                                 'close'  => '',
2006                                 'sample' => '',
2007                                 'tip'    => wfMsg('hr_tip'),
2008                                 'key'    => 'R'
2009                         )
2010                 );
2011                 $toolbar = "<div id='toolbar'>\n";
2012                 $toolbar.="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
2013
2014                 foreach($toolarray as $tool) {
2015                         $params = array(
2016                                 $image = $wgStylePath.'/common/images/'.$tool['image'],
2017                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
2018                                 // Older browsers show a "speedtip" type message only for ALT.
2019                                 // Ideally these should be different, realistically they
2020                                 // probably don't need to be.
2021                                 $tip = $tool['tip'],
2022                                 $open = $tool['open'],
2023                                 $close = $tool['close'],
2024                                 $sample = $tool['sample'],
2025                                 $cssId = $tool['id'],
2026                         );
2027
2028                         $paramList = implode( ',',
2029                                 array_map( array( 'Xml', 'encodeJsVar' ), $params ) );
2030                         $toolbar.="addButton($paramList);\n";
2031                 }
2032
2033                 $toolbar.="/*]]>*/\n</script>";
2034                 $toolbar.="\n</div>";
2035                 return $toolbar;
2036         }
2037
2038         /**
2039          * Returns an array of html code of the following checkboxes:
2040          * minor and watch
2041          *
2042          * @param $tabindex Current tabindex
2043          * @param $skin Skin object
2044          * @param $checked Array of checkbox => bool, where bool indicates the checked
2045          *                 status of the checkbox
2046          *
2047          * @return array
2048          */
2049         public static function getCheckboxes( &$tabindex, $skin, $checked ) {
2050                 global $wgUser;
2051
2052                 $checkboxes = array();
2053
2054                 $checkboxes['minor'] = '';
2055                 $minorLabel = wfMsgExt('minoredit', array('parseinline'));
2056                 if ( $wgUser->isAllowed('minoredit') ) {
2057                         $attribs = array(
2058                                 'tabindex'  => ++$tabindex,
2059                                 'accesskey' => wfMsg( 'accesskey-minoredit' ),
2060                                 'id'        => 'wpMinoredit',
2061                         );
2062                         $checkboxes['minor'] =
2063                                 Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
2064                                 "&nbsp;<label for='wpMinoredit'".$skin->tooltip('minoredit', 'withaccess').">{$minorLabel}</label>";
2065                 }
2066
2067                 $watchLabel = wfMsgExt('watchthis', array('parseinline'));
2068                 $checkboxes['watch'] = '';
2069                 if ( $wgUser->isLoggedIn() ) {
2070                         $attribs = array(
2071                                 'tabindex'  => ++$tabindex,
2072                                 'accesskey' => wfMsg( 'accesskey-watch' ),
2073                                 'id'        => 'wpWatchthis',
2074                         );
2075                         $checkboxes['watch'] =
2076                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
2077                                 "&nbsp;<label for='wpWatchthis'".$skin->tooltip('watch', 'withaccess').">{$watchLabel}</label>";
2078                 }
2079                 return $checkboxes;
2080         }
2081
2082         /**
2083          * Returns an array of html code of the following buttons:
2084          * save, diff, preview and live
2085          *
2086          * @param $tabindex Current tabindex
2087          *
2088          * @return array
2089          */
2090         public function getEditButtons(&$tabindex) {
2091                 global $wgLivePreview, $wgUser;
2092
2093                 $buttons = array();
2094
2095                 $temp = array(
2096                         'id'        => 'wpSave',
2097                         'name'      => 'wpSave',
2098                         'type'      => 'submit',
2099                         'tabindex'  => ++$tabindex,
2100                         'value'     => wfMsg('savearticle'),
2101                         'accesskey' => wfMsg('accesskey-save'),
2102                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
2103                 );
2104                 $buttons['save'] = Xml::element('input', $temp, '');
2105
2106                 ++$tabindex; // use the same for preview and live preview
2107                 if ( $wgLivePreview && $wgUser->getOption( 'uselivepreview' ) ) {
2108                         $temp = array(
2109                                 'id'        => 'wpPreview',
2110                                 'name'      => 'wpPreview',
2111                                 'type'      => 'submit',
2112                                 'tabindex'  => $tabindex,
2113                                 'value'     => wfMsg('showpreview'),
2114                                 'accesskey' => '',
2115                                 'title'     => wfMsg( 'tooltip-preview' ).' ['.wfMsg( 'accesskey-preview' ).']',
2116                                 'style'     => 'display: none;',
2117                         );
2118                         $buttons['preview'] = Xml::element('input', $temp, '');
2119
2120                         $temp = array(
2121                                 'id'        => 'wpLivePreview',
2122                                 'name'      => 'wpLivePreview',
2123                                 'type'      => 'submit',
2124                                 'tabindex'  => $tabindex,
2125                                 'value'     => wfMsg('showlivepreview'),
2126                                 'accesskey' => wfMsg('accesskey-preview'),
2127                                 'title'     => '',
2128                                 'onclick'   => $this->doLivePreviewScript(),
2129                         );
2130                         $buttons['live'] = Xml::element('input', $temp, '');
2131                 } else {
2132                         $temp = array(
2133                                 'id'        => 'wpPreview',
2134                                 'name'      => 'wpPreview',
2135                                 'type'      => 'submit',
2136                                 'tabindex'  => $tabindex,
2137                                 'value'     => wfMsg('showpreview'),
2138                                 'accesskey' => wfMsg('accesskey-preview'),
2139                                 'title'     => wfMsg( 'tooltip-preview' ).' ['.wfMsg( 'accesskey-preview' ).']',
2140                         );
2141                         $buttons['preview'] = Xml::element('input', $temp, '');
2142                         $buttons['live'] = '';
2143                 }
2144
2145                 $temp = array(
2146                         'id'        => 'wpDiff',
2147                         'name'      => 'wpDiff',
2148                         'type'      => 'submit',
2149                         'tabindex'  => ++$tabindex,
2150                         'value'     => wfMsg('showdiff'),
2151                         'accesskey' => wfMsg('accesskey-diff'),
2152                         'title'     => wfMsg( 'tooltip-diff' ).' ['.wfMsg( 'accesskey-diff' ).']',
2153                 );
2154                 $buttons['diff'] = Xml::element('input', $temp, '');
2155
2156                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons ) );
2157                 return $buttons;
2158         }
2159
2160         /**
2161          * Output preview text only. This can be sucked into the edit page
2162          * via JavaScript, and saves the server time rendering the skin as
2163          * well as theoretically being more robust on the client (doesn't
2164          * disturb the edit box's undo history, won't eat your text on
2165          * failure, etc).
2166          *
2167          * @todo This doesn't include category or interlanguage links.
2168          *       Would need to enhance it a bit, <s>maybe wrap them in XML
2169          *       or something...</s> that might also require more skin
2170          *       initialization, so check whether that's a problem.
2171          */
2172         function livePreview() {
2173                 global $wgOut;
2174                 $wgOut->disable();
2175                 header( 'Content-type: text/xml; charset=utf-8' );
2176                 header( 'Cache-control: no-cache' );
2177
2178                 $previewText = $this->getPreviewText();
2179                 #$categories = $skin->getCategoryLinks();
2180
2181                 $s =
2182                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
2183                 Xml::tags( 'livepreview', null,
2184                         Xml::element( 'preview', null, $previewText )
2185                         #.      Xml::element( 'category', null, $categories )
2186                 );
2187                 echo $s;
2188         }
2189
2190
2191         /**
2192          * Get a diff between the current contents of the edit box and the
2193          * version of the page we're editing from.
2194          *
2195          * If this is a section edit, we'll replace the section as for final
2196          * save and then make a comparison.
2197          */
2198         function showDiff() {
2199                 $oldtext = $this->mArticle->fetchContent();
2200                 $newtext = $this->mArticle->replaceSection(
2201                         $this->section, $this->textbox1, $this->summary, $this->edittime );
2202                 $newtext = $this->mArticle->preSaveTransform( $newtext );
2203                 $oldtitle = wfMsgExt( 'currentrev', array('parseinline') );
2204                 $newtitle = wfMsgExt( 'yourtext', array('parseinline') );
2205                 if ( $oldtext !== false  || $newtext != '' ) {
2206                         $de = new DifferenceEngine( $this->mTitle );
2207                         $de->setText( $oldtext, $newtext );
2208                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2209                         $de->showDiffStyle();
2210                 } else {
2211                         $difftext = '';
2212                 }
2213
2214                 global $wgOut;
2215                 $wgOut->addHtml( '<div id="wikiDiff">' . $difftext . '</div>' );
2216         }
2217
2218         /**
2219          * Filter an input field through a Unicode de-armoring process if it
2220          * came from an old browser with known broken Unicode editing issues.
2221          *
2222          * @param WebRequest $request
2223          * @param string $field
2224          * @return string
2225          * @private
2226          */
2227         function safeUnicodeInput( $request, $field ) {
2228                 $text = rtrim( $request->getText( $field ) );
2229                 return $request->getBool( 'safemode' )
2230                         ? $this->unmakesafe( $text )
2231                         : $text;
2232         }
2233
2234         /**
2235          * Filter an output field through a Unicode armoring process if it is
2236          * going to an old browser with known broken Unicode editing issues.
2237          *
2238          * @param string $text
2239          * @return string
2240          * @private
2241          */
2242         function safeUnicodeOutput( $text ) {
2243                 global $wgContLang;
2244                 $codedText = $wgContLang->recodeForEdit( $text );
2245                 return $this->checkUnicodeCompliantBrowser()
2246                         ? $codedText
2247                         : $this->makesafe( $codedText );
2248         }
2249
2250         /**
2251          * A number of web browsers are known to corrupt non-ASCII characters
2252          * in a UTF-8 text editing environment. To protect against this,
2253          * detected browsers will be served an armored version of the text,
2254          * with non-ASCII chars converted to numeric HTML character references.
2255          *
2256          * Preexisting such character references will have a 0 added to them
2257          * to ensure that round-trips do not alter the original data.
2258          *
2259          * @param string $invalue
2260          * @return string
2261          * @private
2262          */
2263         function makesafe( $invalue ) {
2264                 // Armor existing references for reversability.
2265                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
2266
2267                 $bytesleft = 0;
2268                 $result = "";
2269                 $working = 0;
2270                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2271                         $bytevalue = ord( $invalue{$i} );
2272                         if ( $bytevalue <= 0x7F ) { //0xxx xxxx
2273                                 $result .= chr( $bytevalue );
2274                                 $bytesleft = 0;
2275                         } elseif ( $bytevalue <= 0xBF ) { //10xx xxxx
2276                                 $working = $working << 6;
2277                                 $working += ($bytevalue & 0x3F);
2278                                 $bytesleft--;
2279                                 if ( $bytesleft <= 0 ) {
2280                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
2281                                 }
2282                         } elseif ( $bytevalue <= 0xDF ) { //110x xxxx
2283                                 $working = $bytevalue & 0x1F;
2284                                 $bytesleft = 1;
2285                         } elseif ( $bytevalue <= 0xEF ) { //1110 xxxx
2286                                 $working = $bytevalue & 0x0F;
2287                                 $bytesleft = 2;
2288                         } else { //1111 0xxx
2289                                 $working = $bytevalue & 0x07;
2290                                 $bytesleft = 3;
2291                         }
2292                 }
2293                 return $result;
2294         }
2295
2296         /**
2297          * Reverse the previously applied transliteration of non-ASCII characters
2298          * back to UTF-8. Used to protect data from corruption by broken web browsers
2299          * as listed in $wgBrowserBlackList.
2300          *
2301          * @param string $invalue
2302          * @return string
2303          * @private
2304          */
2305         function unmakesafe( $invalue ) {
2306                 $result = "";
2307                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2308                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
2309                                 $i += 3;
2310                                 $hexstring = "";
2311                                 do {
2312                                         $hexstring .= $invalue{$i};
2313                                         $i++;
2314                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
2315
2316                                 // Do some sanity checks. These aren't needed for reversability,
2317                                 // but should help keep the breakage down if the editor
2318                                 // breaks one of the entities whilst editing.
2319                                 if ( (substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6) ) {
2320                                         $codepoint = hexdec($hexstring);
2321                                         $result .= codepointToUtf8( $codepoint );
2322                                 } else {
2323                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
2324                                 }
2325                         } else {
2326                                 $result .= substr( $invalue, $i, 1 );
2327                         }
2328                 }
2329                 // reverse the transform that we made for reversability reasons.
2330                 return strtr( $result, array( "&#x0" => "&#x" ) );
2331         }
2332
2333         function noCreatePermission() {
2334                 global $wgOut;
2335                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
2336                 $wgOut->addWikiMsg( 'nocreatetext' );
2337         }
2338
2339         /**
2340          * If there are rows in the deletion log for this page, show them,
2341          * along with a nice little note for the user
2342          *
2343          * @param OutputPage $out
2344          */
2345         protected function showDeletionLog( $out ) {
2346                 global $wgUser;
2347                 $loglist = new LogEventsList( $wgUser->getSkin(), $out );
2348                 $pager = new LogPager( $loglist, 'delete', false, $this->mTitle->getPrefixedText() );
2349                 if ( $pager->getNumRows() > 0 ) {
2350                         $out->addHtml( '<div id="mw-recreate-deleted-warn">' );
2351                         $out->addWikiMsg( 'recreate-deleted-warn' );
2352                         $out->addHTML(
2353                                 $loglist->beginLogEventsList() .
2354                                 $pager->getBody() .
2355                                 $loglist->endLogEventsList()
2356                         );
2357                         $out->addHtml( '</div>' );
2358                         return true;
2359                 }
2360                 return false;
2361         }
2362
2363         /**
2364          * Attempt submission
2365          * @return bool false if output is done, true if the rest of the form should be displayed
2366          */
2367         function attemptSave() {
2368                 global $wgUser, $wgOut, $wgTitle, $wgRequest;
2369
2370                 $resultDetails = false;
2371                 $value = $this->internalAttemptSave( $resultDetails, $wgUser->isAllowed('bot') && $wgRequest->getBool('bot', true) );
2372
2373                 if ( $value == self::AS_SUCCESS_UPDATE || $value == self::AS_SUCCESS_NEW_ARTICLE ) {
2374                         $this->didSave = true;
2375                 }
2376
2377                 switch ($value) {
2378                         case self::AS_HOOK_ERROR_EXPECTED:
2379                         case self::AS_CONTENT_TOO_BIG:
2380                         case self::AS_ARTICLE_WAS_DELETED:
2381                         case self::AS_CONFLICT_DETECTED:
2382                         case self::AS_SUMMARY_NEEDED:
2383                         case self::AS_TEXTBOX_EMPTY:
2384                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
2385                         case self::AS_END:
2386                                 return true;
2387
2388                         case self::AS_HOOK_ERROR:
2389                         case self::AS_FILTERING:
2390                         case self::AS_SUCCESS_NEW_ARTICLE:
2391                         case self::AS_SUCCESS_UPDATE:
2392                                 return false;
2393
2394                         case self::AS_SPAM_ERROR:
2395                                 $this->spamPage ( $resultDetails['spam'] );
2396                                 return false;
2397
2398                         case self::AS_BLOCKED_PAGE_FOR_USER:
2399                                 $this->blockedPage();
2400                                 return false;
2401
2402                         case self::AS_IMAGE_REDIRECT_ANON:
2403                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
2404                                 return false;
2405
2406                         case self::AS_READ_ONLY_PAGE_ANON:
2407                                 $this->userNotLoggedInPage();
2408                                 return false;
2409
2410                         case self::AS_READ_ONLY_PAGE_LOGGED:
2411                         case self::AS_READ_ONLY_PAGE:
2412                                 $wgOut->readOnlyPage();
2413                                 return false;
2414
2415                         case self::AS_RATE_LIMITED:
2416                                 $wgOut->rateLimited();
2417                                 return false;
2418
2419                         case self::AS_NO_CREATE_PERMISSION;
2420                                 $this->noCreatePermission();
2421                                 return;
2422
2423                         case self::AS_BLANK_ARTICLE:
2424                                 $wgOut->redirect( $wgTitle->getFullURL() );
2425                                 return false;
2426
2427                         case self::AS_IMAGE_REDIRECT_LOGGED:
2428                                 $wgOut->permissionRequired( 'upload' );
2429                                 return false;
2430                 }
2431         }
2432
2433         function getBaseRevision() {
2434                 if ( $this->mBaseRevision == false ) {
2435                         $db = wfGetDB( DB_MASTER );
2436                         $baseRevision = Revision::loadFromTimestamp(
2437                                 $db, $this->mTitle, $this->edittime );
2438                         return $this->mBaseRevision = $baseRevision;
2439                 } else {
2440                         return $this->mBaseRevision;
2441                 }
2442         }
2443 }