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, $wgContLang;
 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 ( $wgContLang->getNsText( NS_CATEGORY ) );
 246                 $cat = $ll = array();
 247                 foreach ( $t AS $key => $x ) {
 248                         $y = trim ( strtolower ( $x ) );
 249                         while ( substr ( $y , 0 , 2 ) == '[[' ) {
 250                                 $y = explode ( ']]' , trim ( $x ) );
 251                                 $first = array_shift ( $y );
 252                                 $first = explode ( ':' , $first );
 253                                 $ns = array_shift ( $first );
 254                                 $ns = trim ( str_replace ( '[' , '' , $ns ) );
 255                                 if ( $wgContLang->getLanguageName( $ns ) || strtolower ( $ns ) == $catlow ) {
 256                                         $add = '[[' . $ns . ':' . implode ( ':' , $first ) . ']]';
 257                                         if ( strtolower ( $ns ) == $catlow ) $cat[] = $add;
 258                                         else $ll[] = $add;
 259                                         $x = implode ( ']]' , $y );
 260                                         $t[$key] = $x;
 261                                         $y = trim ( strtolower ( $x ) );
 262                                 } else {
 263                                         $x = implode ( ']]' , $y );
 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                         $isentry = false;
 279                         $x = trim ( $x );
 280                         while ( substr ( $x , 0 , 1 ) == '*' ) {
 281                                 $isentry = true;
 282                                 $x = trim ( substr ( $x , 1 ) );
 283                         }
 284                         if ( $isentry ) {
 285                                 $sat[] = strtolower ( $x );
 286                         }
 287
 288                 }
 289
 290                 # Templates, but only some
 291                 $t = explode ( '{{' , $t );
 292                 $tl = array () ;
 293                 foreach ( $t AS $key => $x ) {
 294                         $y = explode ( '}}' , $x , 2 );
 295                         if ( count ( $y ) == 2 ) {
 296                                 $z = $y[0];
 297                                 $z = explode ( '|' , $z );
 298                                 $tn = array_shift ( $z );
 299                                 if ( in_array ( strtolower ( $tn ) , $sat ) ) {
 300                                         $tl[] = '{{' . $y[0] . '}}';
 301                                         $t[$key] = $y[1];
 302                                         $y = explode ( '}}' , $y[1] , 2 );
 303                                 }
 304                                 else $t[$key] = '{{' . $x;
 305                         }
 306                         else if ( $key != 0 ) $t[$key] = '{{' . $x;
 307                         else $t[$key] = $x;
 308                 }
 309                 if ( count ( $tl ) ) $s .= implode ( ' ' , $tl );
 310                 $t = implode ( '' , $t );
 311
 312                 $t = str_replace ( "\n\n\n" , "\n" , $t );
 313                 $this->mArticle->mContent = $t;
 314                 $this->mMetaData = $s;
 315         }
 316
 317         /*
 318          * Check if a page was deleted while the user was editing it, before submit.
 319          * Note that we rely on the logging table, which hasn't been always there,
 320          * but that doesn't matter, because this only applies to brand new
 321          * deletes.
 322          */
 323         protected function wasDeletedSinceLastEdit() {
 324                 if ( $this->deletedSinceEdit )
 325                         return true;
 326                 if ( $this->mTitle->isDeleted() ) {
 327                         $this->lastDelete = $this->getLastDelete();
 328                         if ( $this->lastDelete ) {
 329                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
 330                                 if ( $deleteTime > $this->starttime ) {
 331                                         $this->deletedSinceEdit = true;
 332                                 }
 333                         }
 334                 }
 335                 return $this->deletedSinceEdit;
 336         }
 337
 338         function submit() {
 339                 $this->edit();
 340         }
 341
 342         /**
 343          * This is the function that gets called for "action=edit". It
 344          * sets up various member variables, then passes execution to
 345          * another function, usually showEditForm()
 346          *
 347          * The edit form is self-submitting, so that when things like
 348          * preview and edit conflicts occur, we get the same form back
 349          * with the extra stuff added.  Only when the final submission
 350          * is made and all is well do we actually save and redirect to
 351          * the newly-edited page.
 352          */
 353         function edit() {
 354                 global $wgOut, $wgUser, $wgRequest;
 355                 // Allow extensions to modify/prevent this form or submission
 356                 if ( !wfRunHooks( 'AlternateEdit', array( &$this ) ) ) {
 357                         return;
 358                 }
 359
 360                 wfProfileIn( __METHOD__ );
 361                 wfDebug( __METHOD__.": enter\n" );
 362
 363                 // This is not an article
 364                 $wgOut->setArticleFlag( false );
 365
 366                 $this->importFormData( $wgRequest );
 367                 $this->firsttime = false;
 368
 369                 if ( $this->live ) {
 370                         $this->livePreview();
 371                         wfProfileOut( __METHOD__ );
 372                         return;
 373                 }
 374
 375                 if ( wfReadOnly() ) {
 376                         if ( $this->save ){
 377                                 // Force preview
 378                                 $this->save = false;
 379                                 $this->preview = true;
 380                         } elseif ( $this->preview || $this->diff ) {
 381                                 // A warning will be displayed instead
 382                         } else {
 383                                 $this->readOnlyPage( $this->getContent() );
 384                                 wfProfileOut( __METHOD__ );
 385                                 return;
 386                         }
 387                 }
 388
 389                 $wgOut->addScriptFile( 'edit.js' );
 390                 $permErrors = $this->getEditPermissionErrors();
 391                 if ( $permErrors ) {
 392                         wfDebug( __METHOD__.": User can't edit\n" );
 393                         $this->readOnlyPage( $this->getContent(), true, $permErrors, 'edit' );
 394                         wfProfileOut( __METHOD__ );
 395                         return;
 396                 } else {
 397                         if ( $this->save ) {
 398                                 $this->formtype = 'save';
 399                         } else if ( $this->preview ) {
 400                                 $this->formtype = 'preview';
 401                         } else if ( $this->diff ) {
 402                                 $this->formtype = 'diff';
 403                         } else { # First time through
 404                                 $this->firsttime = true;
 405                                 if ( $this->previewOnOpen() ) {
 406                                         $this->formtype = 'preview';
 407                                 } else {
 408                                         $this->extractMetaDataFromArticle () ;
 409                                         $this->formtype = 'initial';
 410                                 }
 411                         }
 412                 }
 413
 414                 wfProfileIn( __METHOD__."-business-end" );
 415
 416                 $this->isConflict = false;
 417                 // css / js subpages of user pages get a special treatment
 418                 $this->isCssJsSubpage      = $this->mTitle->isCssJsSubpage();
 419                 $this->isValidCssJsSubpage = $this->mTitle->isValidCssJsSubpage();
 420
 421                 # Show applicable editing introductions
 422                 if ( $this->formtype == 'initial' || $this->firsttime )
 423                         $this->showIntro();
 424
 425                 if ( $this->mTitle->isTalkPage() ) {
 426                         $wgOut->addWikiMsg( 'talkpagetext' );
 427                 }
 428
 429                 # Optional notices on a per-namespace and per-page basis
 430                 $editnotice_ns   = 'editnotice-'.$this->mTitle->getNamespace();
 431                 $editnotice_page = $editnotice_ns.'-'.$this->mTitle->getDBkey();
 432                 if ( !wfEmptyMsg( $editnotice_ns, wfMsgForContent( $editnotice_ns ) ) ) {
 433                         $wgOut->addWikiText( wfMsgForContent( $editnotice_ns )  );
 434                 }
 435                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
 436                         $parts = explode( '/', $this->mTitle->getDBkey() );
 437                         $editnotice_base = $editnotice_ns;
 438                         while ( count( $parts ) > 0 ) {
 439                                 $editnotice_base .= '-'.array_shift( $parts );
 440                                 if ( !wfEmptyMsg( $editnotice_base, wfMsgForContent( $editnotice_base ) ) ) {
 441                                         $wgOut->addWikiText( wfMsgForContent( $editnotice_base )  );
 442                                 }
 443                         }
 444                 } else if ( !wfEmptyMsg( $editnotice_page, wfMsgForContent( $editnotice_page ) ) ) {
 445                         $wgOut->addWikiText( wfMsgForContent( $editnotice_page ) );
 446                 }
 447
 448                 # Attempt submission here.  This will check for edit conflicts,
 449                 # and redundantly check for locked database, blocked IPs, etc.
 450                 # that edit() already checked just in case someone tries to sneak
 451                 # in the back door with a hand-edited submission URL.
 452
 453                 if ( 'save' == $this->formtype ) {
 454                         if ( !$this->attemptSave() ) {
 455                                 wfProfileOut( __METHOD__."-business-end" );
 456                                 wfProfileOut( __METHOD__ );
 457                                 return;
 458                         }
 459                 }
 460
 461                 # First time through: get contents, set time for conflict
 462                 # checking, etc.
 463                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 464                         if ( $this->initialiseForm() === false) {
 465                                 $this->noSuchSectionPage();
 466                                 wfProfileOut( __METHOD__."-business-end" );
 467                                 wfProfileOut( __METHOD__ );
 468                                 return;
 469                         }
 470                         if ( !$this->mTitle->getArticleId() )
 471                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 472                 }
 473
 474                 $this->showEditForm();
 475                 wfProfileOut( __METHOD__."-business-end" );
 476                 wfProfileOut( __METHOD__ );
 477         }
 478
 479         protected function getEditPermissionErrors() {
 480                 global $wgUser;
 481                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 482                 # Can this title be created?
 483                 if ( !$this->mTitle->exists() ) {
 484                         $permErrors = array_merge( $permErrors,
 485                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 486                 }
 487                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 488                 $remove = array();
 489                 foreach( $permErrors as $error ) {
 490                         if ( ($this->preview || $this->diff) &&
 491                                 ($error[0] == 'blockedtext' || $error[0] == 'autoblockedtext') )
 492                         {
 493                                 $remove[] = $error;
 494                         }
 495                 }
 496                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 497                 return $permErrors;
 498         }
 499
 500         /**
 501          * Show a read-only error
 502          * Parameters are the same as OutputPage:readOnlyPage()
 503          * Redirect to the article page if redlink=1
 504          */
 505         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 506                 global $wgRequest, $wgOut;
 507                 if ( $wgRequest->getBool( 'redlink' ) ) {
 508                         // The edit page was reached via a red link.
 509                         // Redirect to the article page and let them click the edit tab if
 510                         // they really want a permission error.
 511                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 512                 } else {
 513                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 514                 }
 515         }
 516
 517         /**
 518          * Should we show a preview when the edit form is first shown?
 519          *
 520          * @return bool
 521          */
 522         protected function previewOnOpen() {
 523                 global $wgRequest, $wgUser;
 524                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 525                         // Explicit override from request
 526                         return true;
 527                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 528                         // Explicit override from request
 529                         return false;
 530                 } elseif ( $this->section == 'new' ) {
 531                         // Nothing *to* preview for new sections
 532                         return false;
 533                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== '' || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 534                         // Standard preference behaviour
 535                         return true;
 536                 } elseif ( !$this->mTitle->exists() && $this->mTitle->getNamespace() == NS_CATEGORY ) {
 537                         // Categories are special
 538                         return true;
 539                 } else {
 540                         return false;
 541                 }
 542         }
 543
 544         /**
 545          * @todo document
 546          * @param $request
 547          */
 548         function importFormData( &$request ) {
 549                 global $wgLang, $wgUser;
 550                 $fname = 'EditPage::importFormData';
 551                 wfProfileIn( $fname );
 552
 553                 # Section edit can come from either the form or a link
 554                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 555
 556                 if ( $request->wasPosted() ) {
 557                         # These fields need to be checked for encoding.
 558                         # Also remove trailing whitespace, but don't remove _initial_
 559                         # whitespace from the text boxes. This may be significant formatting.
 560                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 561                         $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
 562                         $this->mMetaData = rtrim( $request->getText( 'metadata' ) );
 563                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 564                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary'  ), 250 );
 565
 566                         # Remove extra headings from summaries and new sections.
 567                         $this->summary = preg_replace('/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary);
 568
 569                         $this->edittime = $request->getVal( 'wpEdittime' );
 570                         $this->starttime = $request->getVal( 'wpStarttime' );
 571
 572                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 573
 574                         if ( is_null( $this->edittime ) ) {
 575                                 # If the form is incomplete, force to preview.
 576                                 wfDebug( "$fname: Form data appears to be incomplete\n" );
 577                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 578                                 $this->preview  = true;
 579                         } else {
 580                                 /* Fallback for live preview */
 581                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 582                                 $this->diff = $request->getCheck( 'wpDiff' );
 583
 584                                 // Remember whether a save was requested, so we can indicate
 585                                 // if we forced preview due to session failure.
 586                                 $this->mTriedSave = !$this->preview;
 587
 588                                 if ( $this->tokenOk( $request ) ) {
 589                                         # Some browsers will not report any submit button
 590                                         # if the user hits enter in the comment box.
 591                                         # The unmarked state will be assumed to be a save,
 592                                         # if the form seems otherwise complete.
 593                                         wfDebug( "$fname: Passed token check.\n" );
 594                                 } else if ( $this->diff ) {
 595                                         # Failed token check, but only requested "Show Changes".
 596                                         wfDebug( "$fname: Failed token check; Show Changes requested.\n" );
 597                                 } else {
 598                                         # Page might be a hack attempt posted from
 599                                         # an external site. Preview instead of saving.
 600                                         wfDebug( "$fname: Failed token check; forcing preview\n" );
 601                                         $this->preview = true;
 602                                 }
 603                         }
 604                         $this->save = !$this->preview && !$this->diff;
 605                         if ( !preg_match( '/^\d{14}$/', $this->edittime )) {
 606                                 $this->edittime = null;
 607                         }
 608
 609                         if ( !preg_match( '/^\d{14}$/', $this->starttime )) {
 610                                 $this->starttime = null;
 611                         }
 612
 613                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 614
 615                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 616                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 617
 618                         # Don't force edit summaries when a user is editing their own user or talk page
 619                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 620                                 $this->mTitle->getText() == $wgUser->getName() )
 621                         {
 622                                 $this->allowBlankSummary = true;
 623                         } else {
 624                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary');
 625                         }
 626
 627                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 628                 } else {
 629                         # Not a posted form? Start with nothing.
 630                         wfDebug( "$fname: Not a posted form.\n" );
 631                         $this->textbox1  = '';
 632                         $this->textbox2  = '';
 633                         $this->mMetaData = '';
 634                         $this->summary   = '';
 635                         $this->edittime  = '';
 636                         $this->starttime = wfTimestampNow();
 637                         $this->edit      = false;
 638                         $this->preview   = false;
 639                         $this->save      = false;
 640                         $this->diff      = false;
 641                         $this->minoredit = false;
 642                         $this->watchthis = false;
 643                         $this->recreate  = false;
 644
 645                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 646                                 $this->summary = $request->getVal( 'preloadtitle' );
 647                         }
 648                 }
 649
 650                 $this->oldid = $request->getInt( 'oldid' );
 651
 652                 $this->live = $request->getCheck( 'live' );
 653                 $this->editintro = $request->getText( 'editintro' );
 654
 655                 wfProfileOut( $fname );
 656         }
 657
 658         /**
 659          * Make sure the form isn't faking a user's credentials.
 660          *
 661          * @param $request WebRequest
 662          * @return bool
 663          * @private
 664          */
 665         function tokenOk( &$request ) {
 666                 global $wgUser;
 667                 $token = $request->getVal( 'wpEditToken' );
 668                 $this->mTokenOk = $wgUser->matchEditToken( $token );
 669                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
 670                 return $this->mTokenOk;
 671         }
 672
 673         /**
 674          * Show all applicable editing introductions
 675          */
 676         protected function showIntro() {
 677                 global $wgOut, $wgUser;
 678                 if ( $this->suppressIntro ) {
 679                         return;
 680                 }
 681                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exists
 682                 if ( $this->mTitle->getNamespace() == NS_USER || $this->mTitle->getNamespace() == NS_USER_TALK ) {
 683                         $parts = explode( '/', $this->mTitle->getText(), 2 );
 684                         $username = $parts[0];
 685                         $id = User::idFromName( $username );
 686                         $ip = User::isIP( $username );
 687                         if ( $id == 0 && !$ip ) {
 688                                 $wgOut->wrapWikiMsg( '<div class="mw-userpage-userdoesnotexist error">$1</div>',
 689                                         array( 'userpage-userdoesnotexist', $username ) );
 690                         }
 691                 }
 692                 # Try to add a custom edit intro, or use the standard one if this is not possible.
 693                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
 694                         if ( $wgUser->isLoggedIn() ) {
 695                                 $wgOut->wrapWikiMsg( '<div class="mw-newarticletext">$1</div>', 'newarticletext' );
 696                         } else {
 697                                 $wgOut->wrapWikiMsg( '<div class="mw-newarticletextanon">$1</div>', 'newarticletextanon' );
 698                         }
 699                 }
 700                 # Give a notice if the user is editing a deleted page...
 701                 if ( !$this->mTitle->exists() ) {
 702                         $this->showDeletionLog( $wgOut );
 703                 }
 704         }
 705
 706         /**
 707          * Attempt to show a custom editing introduction, if supplied
 708          *
 709          * @return bool
 710          */
 711         protected function showCustomIntro() {
 712                 if ( $this->editintro ) {
 713                         $title = Title::newFromText( $this->editintro );
 714                         if ( $title instanceof Title && $title->exists() && $title->userCanRead() ) {
 715                                 global $wgOut;
 716                                 $revision = Revision::newFromTitle( $title );
 717                                 $wgOut->addWikiTextTitleTidy( $revision->getText(), $this->mTitle );
 718                                 return true;
 719                         } else {
 720                                 return false;
 721                         }
 722                 } else {
 723                         return false;
 724                 }
 725         }
 726
 727         /**
 728          * Attempt submission (no UI)
 729          * @return one of the constants describing the result
 730          */
 731         function internalAttemptSave( &$result, $bot = false ) {
 732                 global $wgFilterCallback, $wgUser, $wgOut, $wgParser;
 733                 global $wgMaxArticleSize;
 734
 735                 $fname = 'EditPage::attemptSave';
 736                 wfProfileIn( $fname );
 737                 wfProfileIn( "$fname-checks" );
 738
 739                 if ( !wfRunHooks( 'EditPage::attemptSave', array( &$this ) ) )
 740                 {
 741                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving" );
 742                         return self::AS_HOOK_ERROR;
 743                 }
 744
 745                 # Check image redirect
 746                 if ( $this->mTitle->getNamespace() == NS_IMAGE &&
 747                         Title::newFromRedirect( $this->textbox1 ) instanceof Title &&
 748                         !$wgUser->isAllowed( 'upload' ) ) {
 749                                 if ( $wgUser->isAnon() ) {
 750                                         return self::AS_IMAGE_REDIRECT_ANON;
 751                                 } else {
 752                                         return self::AS_IMAGE_REDIRECT_LOGGED;
 753                                 }
 754                 }
 755
 756                 # Reintegrate metadata
 757                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 758                 $this->mMetaData = '' ;
 759
 760                 # Check for spam
 761                 $match = self::matchSpamRegex( $this->summary );
 762                 if ( $match === false ) {
 763                         $match = self::matchSpamRegex( $this->textbox1 );
 764                 }
 765                 if ( $match !== false ) {
 766                         $result['spam'] = $match;
 767                         $ip = wfGetIP();
 768                         $pdbk = $this->mTitle->getPrefixedDBkey();
 769                         $match = str_replace( "\n", '', $match );
 770                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
 771                         wfProfileOut( "$fname-checks" );
 772                         wfProfileOut( $fname );
 773                         return self::AS_SPAM_ERROR;
 774                 }
 775                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
 776                         # Error messages or other handling should be performed by the filter function
 777                         wfProfileOut( "$fname-checks" );
 778                         wfProfileOut( $fname );
 779                         return self::AS_FILTERING;
 780                 }
 781                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
 782                         # Error messages etc. could be handled within the hook...
 783                         wfProfileOut( "$fname-checks" );
 784                         wfProfileOut( $fname );
 785                         return self::AS_HOOK_ERROR;
 786                 } elseif ( $this->hookError != '' ) {
 787                         # ...or the hook could be expecting us to produce an error
 788                         wfProfileOut( "$fname-checks" );
 789                         wfProfileOut( $fname );
 790                         return self::AS_HOOK_ERROR_EXPECTED;
 791                 }
 792                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 793                         # Check block state against master, thus 'false'.
 794                         wfProfileOut( "$fname-checks" );
 795                         wfProfileOut( $fname );
 796                         return self::AS_BLOCKED_PAGE_FOR_USER;
 797                 }
 798                 $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 799                 if ( $this->kblength > $wgMaxArticleSize ) {
 800                         // Error will be displayed by showEditForm()
 801                         $this->tooBig = true;
 802                         wfProfileOut( "$fname-checks" );
 803                         wfProfileOut( $fname );
 804                         return self::AS_CONTENT_TOO_BIG;
 805                 }
 806
 807                 if ( !$wgUser->isAllowed('edit') ) {
 808                         if ( $wgUser->isAnon() ) {
 809                                 wfProfileOut( "$fname-checks" );
 810                                 wfProfileOut( $fname );
 811                                 return self::AS_READ_ONLY_PAGE_ANON;
 812                         }
 813                         else {
 814                                 wfProfileOut( "$fname-checks" );
 815                                 wfProfileOut( $fname );
 816                                 return self::AS_READ_ONLY_PAGE_LOGGED;
 817                         }
 818                 }
 819
 820                 if ( wfReadOnly() ) {
 821                         wfProfileOut( "$fname-checks" );
 822                         wfProfileOut( $fname );
 823                         return self::AS_READ_ONLY_PAGE;
 824                 }
 825                 if ( $wgUser->pingLimiter() ) {
 826                         wfProfileOut( "$fname-checks" );
 827                         wfProfileOut( $fname );
 828                         return self::AS_RATE_LIMITED;
 829                 }
 830
 831                 # If the article has been deleted while editing, don't save it without
 832                 # confirmation
 833                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
 834                         wfProfileOut( "$fname-checks" );
 835                         wfProfileOut( $fname );
 836                         return self::AS_ARTICLE_WAS_DELETED;
 837                 }
 838
 839                 wfProfileOut( "$fname-checks" );
 840
 841                 # If article is new, insert it.
 842                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 843                 if ( 0 == $aid ) {
 844                         // Late check for create permission, just in case *PARANOIA*
 845                         if ( !$this->mTitle->userCan( 'create' ) ) {
 846                                 wfDebug( "$fname: no create permission\n" );
 847                                 wfProfileOut( $fname );
 848                                 return self::AS_NO_CREATE_PERMISSION;
 849                         }
 850
 851                         # Don't save a new article if it's blank.
 852                         if ( '' == $this->textbox1 ) {
 853                                 wfProfileOut( $fname );
 854                                 return self::AS_BLANK_ARTICLE;
 855                         }
 856
 857                         // Run post-section-merge edit filter
 858                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
 859                                 # Error messages etc. could be handled within the hook...
 860                                 wfProfileOut( $fname );
 861                                 return self::AS_HOOK_ERROR;
 862                         }
 863
 864                         $isComment = ( $this->section == 'new' );
 865
 866                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 867                                 $this->minoredit, $this->watchthis, false, $isComment, $bot);
 868
 869                         wfProfileOut( $fname );
 870                         return self::AS_SUCCESS_NEW_ARTICLE;
 871                 }
 872
 873                 # Article exists. Check for edit conflict.
 874
 875                 $this->mArticle->clear(); # Force reload of dates, etc.
 876                 $this->mArticle->forUpdate( true ); # Lock the article
 877
 878                 wfDebug("timestamp: {$this->mArticle->getTimestamp()}, edittime: {$this->edittime}\n");
 879
 880                 if ( $this->mArticle->getTimestamp() != $this->edittime ) {
 881                         $this->isConflict = true;
 882                         if ( $this->section == 'new' ) {
 883                                 if ( $this->mArticle->getUserText() == $wgUser->getName() &&
 884                                         $this->mArticle->getComment() == $this->summary ) {
 885                                         // Probably a duplicate submission of a new comment.
 886                                         // This can happen when squid resends a request after
 887                                         // a timeout but the first one actually went through.
 888                                         wfDebug( "EditPage::editForm duplicate new section submission; trigger edit conflict!\n" );
 889                                 } else {
 890                                         // New comment; suppress conflict.
 891                                         $this->isConflict = false;
 892                                         wfDebug( "EditPage::editForm conflict suppressed; new section\n" );
 893                                 }
 894                         }
 895                 }
 896                 $userid = $wgUser->getId();
 897
 898                 if ( $this->isConflict ) {
 899                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 900                                 $this->mArticle->getTimestamp() . "')\n" );
 901                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime);
 902                 }
 903                 else {
 904                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 905                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary);
 906                 }
 907                 if ( is_null( $text ) ) {
 908                         wfDebug( "EditPage::editForm activating conflict; section replace failed.\n" );
 909                         $this->isConflict = true;
 910                         $text = $this->textbox1;
 911                 }
 912
 913                 # Suppress edit conflict with self, except for section edits where merging is required.
 914                 if ( ( $this->section == '' ) && ( 0 != $userid ) && ( $this->mArticle->getUser() == $userid ) ) {
 915                         wfDebug( "EditPage::editForm Suppressing edit conflict, same user.\n" );
 916                         $this->isConflict = false;
 917                 } else {
 918                         # switch from section editing to normal editing in edit conflict
 919                         if ( $this->isConflict ) {
 920                                 # Attempt merge
 921                                 if ( $this->mergeChangesInto( $text ) ) {
 922                                         // Successful merge! Maybe we should tell the user the good news?
 923                                         $this->isConflict = false;
 924                                         wfDebug( "EditPage::editForm Suppressing edit conflict, successful merge.\n" );
 925                                 } else {
 926                                         $this->section = '';
 927                                         $this->textbox1 = $text;
 928                                         wfDebug( "EditPage::editForm Keeping edit conflict, failed merge.\n" );
 929                                 }
 930                         }
 931                 }
 932
 933                 if ( $this->isConflict ) {
 934                         wfProfileOut( $fname );
 935                         return self::AS_CONFLICT_DETECTED;
 936                 }
 937
 938                 $oldtext = $this->mArticle->getContent();
 939
 940                 // Run post-section-merge edit filter
 941                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$this->hookError, $this->summary ) ) ) {
 942                         # Error messages etc. could be handled within the hook...
 943                         wfProfileOut( $fname );
 944                         return self::AS_HOOK_ERROR;
 945                 }
 946
 947                 # Handle the user preference to force summaries here, but not for null edits
 948                 if ( $this->section != 'new' && !$this->allowBlankSummary && 0 != strcmp($oldtext, $text) &&
 949                         !is_object( Title::newFromRedirect( $text ) ) # check if it's not a redirect
 950                 ) {
 951                         if ( md5( $this->summary ) == $this->autoSumm ) {
 952                                 $this->missingSummary = true;
 953                                 wfProfileOut( $fname );
 954                                 return self::AS_SUMMARY_NEEDED;
 955                         }
 956                 }
 957
 958                 # And a similar thing for new sections
 959                 if ( $this->section == 'new' && !$this->allowBlankSummary ) {
 960                         if (trim($this->summary) == '') {
 961                                 $this->missingSummary = true;
 962                                 wfProfileOut( $fname );
 963                                 return self::AS_SUMMARY_NEEDED;
 964                         }
 965                 }
 966
 967                 # All's well
 968                 wfProfileIn( "$fname-sectionanchor" );
 969                 $sectionanchor = '';
 970                 if ( $this->section == 'new' ) {
 971                         if ( $this->textbox1 == '' ) {
 972                                 $this->missingComment = true;
 973                                 return self::AS_TEXTBOX_EMPTY;
 974                         }
 975                         if ( $this->summary != '' ) {
 976                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $this->summary );
 977                                 # This is a new section, so create a link to the new section
 978                                 # in the revision summary.
 979                                 $cleanSummary = $wgParser->stripSectionName( $this->summary );
 980                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
 981                         }
 982                 } elseif ( $this->section != '' ) {
 983                         # Try to get a section anchor from the section source, redirect to edited section if header found
 984                         # XXX: might be better to integrate this into Article::replaceSection
 985                         # for duplicate heading checking and maybe parsing
 986                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 987                         # we can't deal with anchors, includes, html etc in the header for now,
 988                         # headline would need to be parsed to improve this
 989                         if ( $hasmatch and strlen($matches[2]) > 0 ) {
 990                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $matches[2] );
 991                         }
 992                 }
 993                 wfProfileOut( "$fname-sectionanchor" );
 994
 995                 // Save errors may fall down to the edit form, but we've now
 996                 // merged the section into full text. Clear the section field
 997                 // so that later submission of conflict forms won't try to
 998                 // replace that into a duplicated mess.
 999                 $this->textbox1 = $text;
1000                 $this->section = '';
1001
1002                 // Check for length errors again now that the section is merged in
1003                 $this->kblength = (int)(strlen( $text ) / 1024);
1004                 if ( $this->kblength > $wgMaxArticleSize ) {
1005                         $this->tooBig = true;
1006                         wfProfileOut( $fname );
1007                         return self::AS_MAX_ARTICLE_SIZE_EXCEEDED;
1008                 }
1009
1010                 # update the article here
1011                 if ( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
1012                         $this->watchthis, $bot, $sectionanchor ) ) {
1013                         wfProfileOut( $fname );
1014                         return self::AS_SUCCESS_UPDATE;
1015                 } else {
1016                         $this->isConflict = true;
1017                 }
1018                 wfProfileOut( $fname );
1019                 return self::AS_END;
1020         }
1021
1022         /**
1023          * Check given input text against $wgSpamRegex, and return the text of the first match.
1024          * @return mixed -- matching string or false
1025          */
1026         public static function matchSpamRegex( $text ) {
1027                 global $wgSpamRegex;
1028                 if ( $wgSpamRegex ) {
1029                         // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1030                         $regexes = (array)$wgSpamRegex;
1031                         foreach( $regexes as $regex ) {
1032                                 $matches = array();
1033                                 if ( preg_match( $regex, $text, $matches ) ) {
1034                                         return $matches[0];
1035                                 }
1036                         }
1037                 }
1038                 return false;
1039         }
1040
1041         /**
1042          * Initialise form fields in the object
1043          * Called on the first invocation, e.g. when a user clicks an edit link
1044          */
1045         function initialiseForm() {
1046                 $this->edittime = $this->mArticle->getTimestamp();
1047                 $this->textbox1 = $this->getContent(false);
1048                 if ( $this->textbox1 === false) return false;
1049
1050                 if ( !$this->mArticle->exists() && $this->mTitle->getNamespace() == NS_MEDIAWIKI )
1051                         $this->textbox1 = wfMsgWeirdKey( $this->mTitle->getText() );
1052                 wfProxyCheck();
1053                 return true;
1054         }
1055
1056         function setHeaders() {
1057                 global $wgOut, $wgTitle;
1058                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1059                 if ( $this->formtype == 'preview' ) {
1060                         $wgOut->setPageTitleActionText( wfMsg( 'preview' ) );
1061                 }
1062                 if ( $this->isConflict ) {
1063                         $wgOut->setPageTitle( wfMsg( 'editconflict', $wgTitle->getPrefixedText() ) );
1064                 } elseif ( $this->section != '' ) {
1065                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1066                         $wgOut->setPageTitle( wfMsg( $msg, $wgTitle->getPrefixedText() ) );
1067                 } else {
1068                         # Use the title defined by DISPLAYTITLE magic word when present
1069                         if ( isset($this->mParserOutput)
1070                          && ( $dt = $this->mParserOutput->getDisplayTitle() ) !== false ) {
1071                                 $title = $dt;
1072                         } else {
1073                                 $title = $wgTitle->getPrefixedText();
1074                         }
1075                         $wgOut->setPageTitle( wfMsg( 'editing', $title ) );
1076                 }
1077         }
1078
1079         /**
1080          * Send the edit form and related headers to $wgOut
1081          * @param $formCallback Optional callable that takes an OutputPage
1082          *                      parameter; will be called during form output
1083          *                      near the top, for captchas and the like.
1084          */
1085         function showEditForm( $formCallback=null ) {
1086                 global $wgOut, $wgUser, $wgLang, $wgContLang, $wgMaxArticleSize, $wgTitle;
1087
1088                 # If $wgTitle is null, that means we're in API mode.
1089                 # Some hook probably called this function  without checking
1090                 # for is_null($wgTitle) first. Bail out right here so we don't
1091                 # do lots of work just to discard it right after.
1092                 if (is_null($wgTitle))
1093                         return;
1094
1095                 $fname = 'EditPage::showEditForm';
1096                 wfProfileIn( $fname );
1097
1098                 $sk = $wgUser->getSkin();
1099
1100                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) ) ;
1101
1102                 #need to parse the preview early so that we know which templates are used,
1103                 #otherwise users with "show preview after edit box" will get a blank list
1104                 #we parse this near the beginning so that setHeaders can do the title
1105                 #setting work instead of leaving it in getPreviewText
1106                 $previewOutput = '';
1107                 if ( $this->formtype == 'preview' ) {
1108                         $previewOutput = $this->getPreviewText();
1109                 }
1110
1111                 $this->setHeaders();
1112
1113                 # Enabled article-related sidebar, toplinks, etc.
1114                 $wgOut->setArticleRelated( true );
1115
1116                 if ( $this->isConflict ) {
1117                         $wgOut->addWikiMsg( 'explainconflict' );
1118
1119                         $this->textbox2 = $this->textbox1;
1120                         $this->textbox1 = $this->getContent();
1121                         $this->edittime = $this->mArticle->getTimestamp();
1122                 } else {
1123                         if ( $this->section != '' && $this->section != 'new' ) {
1124                                 $matches = array();
1125                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
1126                                         preg_match( "/^(=+)(.+)\\1/mi",
1127                                                 $this->textbox1,
1128                                                 $matches );
1129                                         if ( !empty( $matches[2] ) ) {
1130                                                 global $wgParser;
1131                                                 $this->summary = "/* " .
1132                                                         $wgParser->stripSectionName(trim($matches[2])) .
1133                                                         " */ ";
1134                                         }
1135                                 }
1136                         }
1137
1138                         if ( $this->missingComment ) {
1139                                 $wgOut->wrapWikiMsg( '<div id="mw-missingcommenttext">$1</div>',  'missingcommenttext' );
1140                         }
1141
1142                         if ( $this->missingSummary && $this->section != 'new' ) {
1143                                 $wgOut->wrapWikiMsg( '<div id="mw-missingsummary">$1</div>', 'missingsummary' );
1144                         }
1145
1146                         if ( $this->missingSummary && $this->section == 'new' ) {
1147                                 $wgOut->wrapWikiMsg( '<div id="mw-missingcommentheader">$1</div>', 'missingcommentheader' );
1148                         }
1149
1150                         if ( $this->hookError !== '' ) {
1151                                 $wgOut->addWikiText( $this->hookError );
1152                         }
1153
1154                         if ( !$this->checkUnicodeCompliantBrowser() ) {
1155                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
1156                         }
1157                         if ( isset( $this->mArticle ) && isset( $this->mArticle->mRevision ) ) {
1158                         // Let sysop know that this will make private content public if saved
1159
1160                                 if ( !$this->mArticle->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1161                                         $wgOut->addWikiMsg( 'rev-deleted-text-permission' );
1162                                 } else if ( $this->mArticle->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1163                                         $wgOut->addWikiMsg( 'rev-deleted-text-view' );
1164                                 }
1165
1166                                 if ( !$this->mArticle->mRevision->isCurrent() ) {
1167                                         $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
1168                                         $wgOut->addWikiMsg( 'editingold' );
1169                                 }
1170                         }
1171                 }
1172
1173                 if ( wfReadOnly() ) {
1174                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
1175                 } elseif ( $wgUser->isAnon() && $this->formtype != 'preview' ) {
1176                         $wgOut->wrapWikiMsg( '<div id="mw-anon-edit-warning">$1</div>', 'anoneditwarning' );
1177                 } else {
1178                         if ( $this->isCssJsSubpage ) {
1179                                 # Check the skin exists
1180                                 if ( $this->isValidCssJsSubpage ) {
1181                                         if ( $this->formtype !== 'preview' ) {
1182                                                 $wgOut->addWikiMsg( 'usercssjsyoucanpreview' );
1183                                         }
1184                                 } else {
1185                                         $wgOut->addWikiMsg( 'userinvalidcssjstitle', $wgTitle->getSkinFromCssJsSubpage() );
1186                                 }
1187                         }
1188                 }
1189
1190                 $classes = array(); // Textarea CSS
1191                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1192                         # Show a warning if editing an interface message
1193                         $wgOut->addWikiMsg( 'editinginterface' );
1194                 } elseif ( $this->mTitle->isProtected( 'edit' ) ) {
1195                         # Is the title semi-protected?
1196                         if ( $this->mTitle->isSemiProtected() ) {
1197                                 $noticeMsg = 'semiprotectedpagewarning';
1198                                 $classes[] = 'mw-textarea-sprotected';
1199                         } else {
1200                                 # Then it must be protected based on static groups (regular)
1201                                 $noticeMsg = 'protectedpagewarning';
1202                                 $classes[] = 'mw-textarea-protected';
1203                         }
1204                         $wgOut->addHTML( "<div id='mw-edit-$noticeMsg'>\n" );
1205                         $wgOut->addWikiMsg( $noticeMsg );
1206                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle->getPrefixedText(), '', 1 );
1207                         $wgOut->addHTML( "</div>\n" );
1208                 }
1209                 if ( $this->mTitle->isCascadeProtected() ) {
1210                         # Is this page under cascading protection from some source pages?
1211                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
1212                         $notice = "$1\n";
1213                         if ( count($cascadeSources) > 0 ) {
1214                                 # Explain, and list the titles responsible
1215                                 foreach( $cascadeSources as $page ) {
1216                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
1217                                 }
1218                         }
1219                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', count($cascadeSources) ) );
1220                 }
1221                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
1222                         $wgOut->addWikiMsg( 'titleprotectedwarning' );
1223                 }
1224
1225                 if ( $this->kblength === false ) {
1226                         $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
1227                 }
1228                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
1229                         $wgOut->addHTML( "<div id='mw-edit-longpageerror'>\n" );
1230                         $wgOut->addWikiMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) );
1231                         $wgOut->addHTML( "</div>\n" );
1232                 } elseif ( $this->kblength > 29 ) {
1233                         $wgOut->addHTML( "<div id='mw-edit-longpagewarning'>\n" );
1234                         $wgOut->addWikiMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) );
1235                         $wgOut->addHTML( "</div>\n" );
1236                 }
1237
1238                 $q = 'action='.$this->action;
1239                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
1240                 $action = $wgTitle->escapeLocalURL( $q );
1241
1242                 $colonSep = wfMsg( 'colon-separator' );
1243                 $summary = wfMsg( 'summary' ) . $colonSep;
1244                 $subject = wfMsg( 'subject' ) . $colonSep;
1245
1246                 $cancel = $sk->makeKnownLink( $wgTitle->getPrefixedText(),
1247                                 wfMsgExt('cancel', array('parseinline')) );
1248                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ));
1249                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
1250                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
1251                         htmlspecialchars( wfMsg( 'newwindow' ) );
1252
1253                 global $wgRightsText;
1254                 if ( $wgRightsText ) {
1255                         $copywarnMsg = array( 'copyrightwarning',
1256                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
1257                                 $wgRightsText );
1258                 } else {
1259                         $copywarnMsg = array( 'copyrightwarning2',
1260                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
1261                 }
1262
1263                 if ( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
1264                         # prepare toolbar for edit buttons
1265                         $toolbar = EditPage::getEditToolbar();
1266                 } else {
1267                         $toolbar = '';
1268                 }
1269
1270                 // activate checkboxes if user wants them to be always active
1271                 if ( !$this->preview && !$this->diff ) {
1272                         # Sort out the "watch" checkbox
1273                         if ( $wgUser->getOption( 'watchdefault' ) ) {
1274                                 # Watch all edits
1275                                 $this->watchthis = true;
1276                         } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1277                                 # Watch creations
1278                                 $this->watchthis = true;
1279                         } elseif ( $this->mTitle->userIsWatching() ) {
1280                                 # Already watched
1281                                 $this->watchthis = true;
1282                         }
1283
1284                         if ( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
1285                 }
1286
1287                 $wgOut->addHTML( $this->editFormPageTop );
1288
1289                 if ( $wgUser->getOption( 'previewontop' ) ) {
1290                         $this->displayPreviewArea( $previewOutput, true );
1291                 }
1292
1293
1294                 $wgOut->addHTML( $this->editFormTextTop );
1295
1296                 # if this is a comment, show a subject line at the top, which is also the edit summary.
1297                 # Otherwise, show a summary field at the bottom
1298                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
1299
1300                 # If a blank edit summary was previously provided, and the appropriate
1301                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1302                 # user being bounced back more than once in the event that a summary
1303                 # is not required.
1304                 #####
1305                 # For a bit more sophisticated detection of blank summaries, hash the
1306                 # automatic one and pass that in the hidden field wpAutoSummary.
1307                 $summaryhiddens =  '';
1308                 if ( $this->missingSummary ) $summaryhiddens .= Xml::hidden( 'wpIgnoreBlankSummary', true );
1309                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1310                 $summaryhiddens .= Xml::hidden( 'wpAutoSummary', $autosumm );
1311                 if ( $this->section == 'new' ) {
1312                         $commentsubject="<span id='wpSummaryLabel'><label for='wpSummary'>{$subject}</label></span>\n<input tabindex='1' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' />{$summaryhiddens}<br />";
1313                         $editsummary = "<div class='editOptions'>\n";
1314                         global $wgParser;
1315                         $formattedSummary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $this->summary ) );
1316                         $subjectpreview = $summarytext && $this->preview ? "<div class=\"mw-summary-preview\">".wfMsg('subject-preview').$colonSep.$sk->commentBlock( $formattedSummary, $this->mTitle, true )."</div>\n" : '';
1317                         $summarypreview = '';
1318                 } else {
1319                         $commentsubject = '';
1320                         $editsummary="<div class='editOptions'>\n<span id='wpSummaryLabel'><label for='wpSummary'>{$summary}</label></span>\n<input tabindex='2' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' />{$summaryhiddens}<br />";
1321                         $summarypreview = $summarytext && $this->preview ? "<div class=\"mw-summary-preview\">".wfMsg('summary-preview').$colonSep.$sk->commentBlock( $this->summary, $this->mTitle )."</div>\n" : '';
1322                         $subjectpreview = '';
1323                 }
1324
1325                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
1326                 if ( !$this->preview && !$this->diff ) {
1327                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
1328                 }
1329                 $templates = $this->getTemplates();
1330                 $formattedtemplates = $sk->formatTemplates( $templates, $this->preview, $this->section != '');
1331
1332                 $hiddencats = $this->mArticle->getHiddenCategories();
1333                 $formattedhiddencats = $sk->formatHiddenCategories( $hiddencats );
1334
1335                 global $wgUseMetadataEdit ;
1336                 if ( $wgUseMetadataEdit ) {
1337                         $metadata = $this->mMetaData ;
1338                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
1339                         $top = wfMsgWikiHtml( 'metadata_help' );
1340                         /* ToDo: Replace with clean code */
1341                         $ew = $wgUser->getOption( 'editwidth' );
1342                         if ( $ew ) $ew = " style=\"width:100%\"";
1343                         else $ew = '';
1344                         $cols = $wgUser->getIntOption( 'cols' );
1345                         /* /ToDo */
1346                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
1347                 }
1348                 else $metadata = "" ;
1349
1350                 $recreate = '';
1351                 if ( $this->wasDeletedSinceLastEdit() ) {
1352                         if ( 'save' != $this->formtype ) {
1353                                 $wgOut->addWikiMsg('deletedwhileediting');
1354                         } else {
1355                                 // Hide the toolbar and edit area, use can click preview to get it back
1356                                 // Add an confirmation checkbox and explanation.
1357                                 $toolbar = '';
1358                                 $recreate = $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ));
1359                                 $recreate .=
1360                                         "<br /><input tabindex='1' type='checkbox' value='1' name='wpRecreate' id='wpRecreate' />".
1361                                         "<label for='wpRecreate' title='".wfMsg('tooltip-recreate')."'>". wfMsg('recreate')."</label>";
1362                         }
1363                 }
1364
1365                 $tabindex = 2;
1366
1367                 $checkboxes = self::getCheckboxes( $tabindex, $sk,
1368                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
1369
1370                 $checkboxhtml = implode( $checkboxes, "\n" );
1371
1372                 $buttons = $this->getEditButtons( $tabindex );
1373                 $buttonshtml = implode( $buttons, "\n" );
1374
1375                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
1376                         ? '' : Xml::hidden( 'safemode', '1' );
1377
1378                 $wgOut->addHTML( <<<END
1379 {$toolbar}
1380 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1381 END
1382 );
1383
1384                 if ( is_callable( $formCallback ) ) {
1385                         call_user_func_array( $formCallback, array( &$wgOut ) );
1386                 }
1387
1388                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1389
1390                 // Put these up at the top to ensure they aren't lost on early form submission
1391                 $this->showFormBeforeText();
1392
1393                 $wgOut->addHTML( <<<END
1394 {$recreate}
1395 {$commentsubject}
1396 {$subjectpreview}
1397 {$this->editFormTextBeforeContent}
1398 END
1399 );
1400                 $this->showTextbox1( $classes );
1401
1402                 $wgOut->wrapWikiMsg( "<div id=\"editpage-copywarn\">\n$1\n</div>", $copywarnMsg );
1403                 $wgOut->addHTML( <<<END
1404 {$this->editFormTextAfterWarn}
1405 {$metadata}
1406 {$editsummary}
1407 {$summarypreview}
1408 {$checkboxhtml}
1409 {$safemodehtml}
1410 END
1411 );
1412
1413                 $wgOut->addHTML(
1414 "<div class='editButtons'>
1415 {$buttonshtml}
1416         <span class='editHelp'>{$cancel} | {$edithelp}</span>
1417 </div><!-- editButtons -->
1418 </div><!-- editOptions -->");
1419
1420                 /**
1421                  * To make it harder for someone to slip a user a page
1422                  * which submits an edit form to the wiki without their
1423                  * knowledge, a random token is associated with the login
1424                  * session. If it's not passed back with the submission,
1425                  * we won't save the page, or render user JavaScript and
1426                  * CSS previews.
1427                  *
1428                  * For anon editors, who may not have a session, we just
1429                  * include the constant suffix to prevent editing from
1430                  * broken text-mangling proxies.
1431                  */
1432                 $token = htmlspecialchars( $wgUser->editToken() );
1433                 $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
1434
1435                 $this->showEditTools();
1436
1437                 $wgOut->addHTML( <<<END
1438 {$this->editFormTextAfterTools}
1439 <div class='templatesUsed'>
1440 {$formattedtemplates}
1441 </div>
1442 <div class='hiddencats'>
1443 {$formattedhiddencats}
1444 </div>
1445 END
1446 );
1447
1448                 if ( $this->isConflict && wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
1449                         $wgOut->wrapWikiMsg( '==$1==', "yourdiff" );
1450
1451                         $de = new DifferenceEngine( $this->mTitle );
1452                         $de->setText( $this->textbox2, $this->textbox1 );
1453                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1454
1455                         $wgOut->wrapWikiMsg( '==$1==', "yourtext" );
1456                         $this->showTextbox2();
1457                 }
1458                 $wgOut->addHTML( $this->editFormTextBottom );
1459                 $wgOut->addHTML( "</form>\n" );
1460                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1461                         $this->displayPreviewArea( $previewOutput, false );
1462                 }
1463
1464                 wfProfileOut( $fname );
1465         }
1466
1467         protected function showFormBeforeText() {
1468                 global $wgOut;
1469                 $wgOut->addHTML( "
1470 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
1471 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
1472 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
1473 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
1474         }
1475
1476         protected function showTextbox1( $classes ) {
1477                 $attribs = array( 'tabindex' => 1 );
1478
1479                 if ( $this->wasDeletedSinceLastEdit() )
1480                         $attribs['type'] = 'hidden';
1481                 if ( !empty($classes) )
1482                         $attribs['class'] = implode(' ',$classes);
1483
1484                 $this->showTextbox( $this->textbox1, 'wpTextbox1', $attribs );
1485         }
1486
1487         protected function showTextbox2() {
1488                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6 ) );
1489         }
1490
1491         protected function showTextbox( $content, $name, $attribs = array() ) {
1492                 global $wgOut, $wgUser;
1493
1494                 $wikitext = $this->safeUnicodeOutput( $content );
1495                 if ( $wikitext !== '' ) {
1496                         // Ensure there's a newline at the end, otherwise adding lines
1497                         // is awkward.
1498                         // But don't add a newline if the ext is empty, or Firefox in XHTML
1499                         // mode will show an extra newline. A bit annoying.
1500                         $wikitext .= "\n";
1501                 }
1502
1503                 $attribs['accesskey'] = ',';
1504                 $attribs['id'] = $name;
1505
1506                 if ( $wgUser->getOption( 'editwidth' ) )
1507                         $attribs['style'] = 'width: 100%';
1508
1509                 $wgOut->addHTML( Xml::textarea(
1510                         $name,
1511                         $wikitext,
1512                         $wgUser->getIntOption( 'cols' ), $wgUser->getIntOption( 'rows' ),
1513                         $attribs ) );
1514         }
1515
1516         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
1517                 global $wgOut;
1518                 $classes = array();
1519                 if ( $isOnTop )
1520                         $classes[] = 'ontop';
1521
1522                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
1523
1524                 if ( $this->formtype != 'preview' )
1525                         $attribs['style'] = 'display: none;';
1526
1527                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
1528
1529                 if ( $this->formtype == 'preview' ) {
1530                         $this->showPreview( $previewOutput );
1531                 }
1532
1533                 $wgOut->addHTML( '</div>' );
1534
1535                 if ( $this->formtype == 'diff') {
1536                         $this->showDiff();
1537                 }
1538         }
1539
1540         /**
1541          * Append preview output to $wgOut.
1542          * Includes category rendering if this is a category page.
1543          *
1544          * @param string $text The HTML to be output for the preview.
1545          */
1546         protected function showPreview( $text ) {
1547                 global $wgOut;
1548                 if ( $this->mTitle->getNamespace() == NS_CATEGORY) {
1549                         $this->mArticle->openShowCategory();
1550                 }
1551                 # This hook seems slightly odd here, but makes things more
1552                 # consistent for extensions.
1553                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
1554                 $wgOut->addHTML( $text );
1555                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
1556                         $this->mArticle->closeShowCategory();
1557                 }
1558         }
1559
1560         /**
1561          * Live Preview lets us fetch rendered preview page content and
1562          * add it to the page without refreshing the whole page.
1563          * If not supported by the browser it will fall through to the normal form
1564          * submission method.
1565          *
1566          * This function outputs a script tag to support live preview, and
1567          * returns an onclick handler which should be added to the attributes
1568          * of the preview button
1569          */
1570         function doLivePreviewScript() {
1571                 global $wgOut, $wgTitle;
1572                 $wgOut->addScriptFile( 'preview.js' );
1573                 $liveAction = $wgTitle->getLocalUrl( "action={$this->action}&wpPreview=true&live=true" );
1574                 return "return !lpDoPreview(" .
1575                         "editform.wpTextbox1.value," .
1576                         '"' . $liveAction . '"' . ")";
1577         }
1578
1579         protected function showEditTools() {
1580                 global $wgOut;
1581                 $wgOut->addHtml( '<div class="mw-editTools">' );
1582                 $wgOut->addWikiMsgArray( 'edittools', array(), array( 'content' ) );
1583                 $wgOut->addHtml( '</div>' );
1584         }
1585
1586         function getLastDelete() {
1587                 $dbr = wfGetDB( DB_SLAVE );
1588                 $data = $dbr->selectRow(
1589                         array( 'logging', 'user' ),
1590                         array( 'log_type',
1591                                'log_action',
1592                                'log_timestamp',
1593                                'log_user',
1594                                'log_namespace',
1595                                'log_title',
1596                                'log_comment',
1597                                'log_params',
1598                                'user_name', ),
1599                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1600                                'log_title' => $this->mTitle->getDBkey(),
1601                                'log_type' => 'delete',
1602                                'log_action' => 'delete',
1603                                'user_id=log_user' ),
1604                         __METHOD__,
1605                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
1606
1607                 return $data;
1608         }
1609
1610         /**
1611          * Get the rendered text for previewing.
1612          * @return string
1613          */
1614         function getPreviewText() {
1615                 global $wgOut, $wgUser, $wgTitle, $wgParser, $wgLang, $wgContLang;
1616
1617                 wfProfileIn( __METHOD__ );
1618
1619                 if ( $this->mTriedSave && !$this->mTokenOk ) {
1620                         if ( $this->mTokenOkExceptSuffix ) {
1621                                 $note = wfMsg( 'token_suffix_mismatch' );
1622                         } else {
1623                                 $note = wfMsg( 'session_fail_preview' );
1624                         }
1625                 } else {
1626                         $note = wfMsg( 'previewnote' );
1627                 }
1628
1629                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1630                 $parserOptions->setEditSection( false );
1631
1632                 global $wgRawHtml;
1633                 if ( $wgRawHtml && !$this->mTokenOk ) {
1634                         // Could be an offsite preview attempt. This is very unsafe if
1635                         // HTML is enabled, as it could be an attack.
1636                         return $wgOut->parse( "<div class='previewnote'>" .
1637                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1638                 }
1639
1640                 # don't parse user css/js, show message about preview
1641                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1642
1643                 if ( $this->isCssJsSubpage ) {
1644                         if (preg_match("/\\.css$/", $this->mTitle->getText() ) ) {
1645                                 $previewtext = wfMsg('usercsspreview');
1646                         } else if (preg_match("/\\.js$/", $this->mTitle->getText() ) ) {
1647                                 $previewtext = wfMsg('userjspreview');
1648                         }
1649                         $parserOptions->setTidy(true);
1650                         $parserOutput = $wgParser->parse( $previewtext, $this->mTitle, $parserOptions );
1651                         $previewHTML = $parserOutput->mText;
1652                 } elseif ( $rt = Title::newFromRedirect( $this->textbox1 ) ) {
1653                         $previewHTML = $this->mArticle->viewRedirect( $rt, false );
1654                 } else {
1655                         $toparse = $this->textbox1;
1656
1657                         # If we're adding a comment, we need to show the
1658                         # summary as the headline
1659                         if ( $this->section=="new" && $this->summary!="" ) {
1660                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1661                         }
1662
1663                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData;
1664
1665                         // Parse mediawiki messages with correct target language
1666                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1667                                 $pos = strrpos( $this->mTitle->getText(), '/' );
1668                                 if ( $pos !== false ) {
1669                                         $code = substr( $this->mTitle->getText(), $pos+1 );
1670                                         switch ($code) {
1671                                                 case $wgLang->getCode():
1672                                                         $obj = $wgLang; break;
1673                                                 case $wgContLang->getCode():
1674                                                         $obj = $wgContLang; break;
1675                                                 default:
1676                                                         $obj = Language::factory( $code );
1677                                         }
1678                                         $parserOptions->setTargetLanguage( $obj );
1679                                 }
1680                         }
1681
1682
1683                         $parserOptions->setTidy(true);
1684                         $parserOptions->enableLimitReport();
1685                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ),
1686                                         $this->mTitle, $parserOptions );
1687
1688                         $previewHTML = $parserOutput->getText();
1689                         $this->mParserOutput = $parserOutput;
1690                         $wgOut->addParserOutputNoText( $parserOutput );
1691
1692                         if ( count( $parserOutput->getWarnings() ) ) {
1693                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
1694                         }
1695                 }
1696
1697                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
1698                         "<div class='previewnote'>" . $wgOut->parse( $note ) . "</div>\n";
1699                 if ( $this->isConflict ) {
1700                         $previewhead .='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1701                 }
1702
1703                 wfProfileOut( __METHOD__ );
1704                 return $previewhead . $previewHTML;
1705         }
1706
1707         function getTemplates() {
1708                 if ( $this->preview || $this->section != '' ) {
1709                         $templates = array();
1710                         if ( !isset($this->mParserOutput) ) return $templates;
1711                         foreach( $this->mParserOutput->getTemplates() as $ns => $template) {
1712                                 foreach( array_keys( $template ) as $dbk ) {
1713                                         $templates[] = Title::makeTitle($ns, $dbk);
1714                                 }
1715                         }
1716                         return $templates;
1717                 } else {
1718                         return $this->mArticle->getUsedTemplates();
1719                 }
1720         }
1721
1722         /**
1723          * Call the stock "user is blocked" page
1724          */
1725         function blockedPage() {
1726                 global $wgOut, $wgUser;
1727                 $wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
1728
1729                 # If the user made changes, preserve them when showing the markup
1730                 # (This happens when a user is blocked during edit, for instance)
1731                 $first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
1732                 if ( $first ) {
1733                         $source = $this->mTitle->exists() ? $this->getContent() : false;
1734                 } else {
1735                         $source = $this->textbox1;
1736                 }
1737
1738                 # Spit out the source or the user's modified version
1739                 if ( $source !== false ) {
1740                         $rows = $wgUser->getIntOption( 'rows' );
1741                         $cols = $wgUser->getIntOption( 'cols' );
1742                         $attribs = array( 'id' => 'wpTextbox1', 'name' => 'wpTextbox1', 'cols' => $cols, 'rows' => $rows, 'readonly' => 'readonly' );
1743                         $wgOut->addHtml( '<hr />' );
1744                         $wgOut->addWikiMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() );
1745                         # Why we don't use Xml::element here?
1746                         # Is it because if $source is '', it returns <textarea />?
1747                         $wgOut->addHtml( Xml::openElement( 'textarea', $attribs ) . htmlspecialchars( $source ) . Xml::closeElement( 'textarea' ) );
1748                 }
1749         }
1750
1751         /**
1752          * Produce the stock "please login to edit pages" page
1753          */
1754         function userNotLoggedInPage() {
1755                 global $wgUser, $wgOut, $wgTitle;
1756                 $skin = $wgUser->getSkin();
1757
1758                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1759                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $wgTitle->getPrefixedUrl() );
1760
1761                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1762                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1763                 $wgOut->setArticleRelated( false );
1764
1765                 $wgOut->addHtml( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
1766                 $wgOut->returnToMain( false, $wgTitle );
1767         }
1768
1769         /**
1770          * Creates a basic error page which informs the user that
1771          * they have attempted to edit a nonexistant section.
1772          */
1773         function noSuchSectionPage() {
1774                 global $wgOut, $wgTitle;
1775
1776                 $wgOut->setPageTitle( wfMsg( 'nosuchsectiontitle' ) );
1777                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1778                 $wgOut->setArticleRelated( false );
1779
1780                 $wgOut->addWikiMsg( 'nosuchsectiontext', $this->section );
1781                 $wgOut->returnToMain( false, $wgTitle );
1782         }
1783
1784         /**
1785          * Produce the stock "your edit contains spam" page
1786          *
1787          * @param $match Text which triggered one or more filters
1788          */
1789         function spamPage( $match = false ) {
1790                 global $wgOut, $wgTitle;
1791
1792                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1793                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1794                 $wgOut->setArticleRelated( false );
1795
1796                 $wgOut->addHtml( '<div id="spamprotected">' );
1797                 $wgOut->addWikiMsg( 'spamprotectiontext' );
1798                 if ( $match )
1799                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
1800                 $wgOut->addHtml( '</div>' );
1801
1802                 $wgOut->returnToMain( false, $wgTitle );
1803         }
1804
1805         /**
1806          * @private
1807          * @todo document
1808          */
1809         function mergeChangesInto( &$editText ){
1810                 $fname = 'EditPage::mergeChangesInto';
1811                 wfProfileIn( $fname );
1812
1813                 $db = wfGetDB( DB_MASTER );
1814
1815                 // This is the revision the editor started from
1816                 $baseRevision = $this->getBaseRevision();
1817                 if ( is_null( $baseRevision ) ) {
1818                         wfProfileOut( $fname );
1819                         return false;
1820                 }
1821                 $baseText = $baseRevision->getText();
1822
1823                 // The current state, we want to merge updates into it
1824                 $currentRevision =  Revision::loadFromTitle(
1825                         $db, $this->mTitle );
1826                 if ( is_null( $currentRevision ) ) {
1827                         wfProfileOut( $fname );
1828                         return false;
1829                 }
1830                 $currentText = $currentRevision->getText();
1831
1832                 $result = '';
1833                 if ( wfMerge( $baseText, $editText, $currentText, $result ) ) {
1834                         $editText = $result;
1835                         wfProfileOut( $fname );
1836                         return true;
1837                 } else {
1838                         wfProfileOut( $fname );
1839                         return false;
1840                 }
1841         }
1842
1843         /**
1844          * Check if the browser is on a blacklist of user-agents known to
1845          * mangle UTF-8 data on form submission. Returns true if Unicode
1846          * should make it through, false if it's known to be a problem.
1847          * @return bool
1848          * @private
1849          */
1850         function checkUnicodeCompliantBrowser() {
1851                 global $wgBrowserBlackList;
1852                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
1853                         // No User-Agent header sent? Trust it by default...
1854                         return true;
1855                 }
1856                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1857                 foreach ( $wgBrowserBlackList as $browser ) {
1858                         if ( preg_match($browser, $currentbrowser) ) {
1859                                 return false;
1860                         }
1861                 }
1862                 return true;
1863         }
1864
1865         /**
1866          * @deprecated use $wgParser->stripSectionName()
1867          */
1868         function pseudoParseSectionAnchor( $text ) {
1869                 global $wgParser;
1870                 return $wgParser->stripSectionName( $text );
1871         }
1872
1873         /**
1874          * Format an anchor fragment as it would appear for a given section name
1875          * @param string $text
1876          * @return string
1877          * @private
1878          */
1879         function sectionAnchor( $text ) {
1880                 global $wgParser;
1881                 return $wgParser->guessSectionNameFromWikiText( $text );
1882         }
1883
1884         /**
1885          * Shows a bulletin board style toolbar for common editing functions.
1886          * It can be disabled in the user preferences.
1887          * The necessary JavaScript code can be found in skins/common/edit.js.
1888          *
1889          * @return string
1890          */
1891         static function getEditToolbar() {
1892                 global $wgStylePath, $wgContLang, $wgLang, $wgJsMimeType;
1893
1894                 /**
1895                  * toolarray an array of arrays which each include the filename of
1896                  * the button image (without path), the opening tag, the closing tag,
1897                  * and optionally a sample text that is inserted between the two when no
1898                  * selection is highlighted.
1899                  * The tip text is shown when the user moves the mouse over the button.
1900                  *
1901                  * Already here are accesskeys (key), which are not used yet until someone
1902                  * can figure out a way to make them work in IE. However, we should make
1903                  * sure these keys are not defined on the edit page.
1904                  */
1905                 $toolarray = array(
1906                         array(
1907                                 'image'  => $wgLang->getImageFile('button-bold'),
1908                                 'id'     => 'mw-editbutton-bold',
1909                                 'open'   => '\'\'\'',
1910                                 'close'  => '\'\'\'',
1911                                 'sample' => wfMsg('bold_sample'),
1912                                 'tip'    => wfMsg('bold_tip'),
1913                                 'key'    => 'B'
1914                         ),
1915                         array(
1916                                 'image'  => $wgLang->getImageFile('button-italic'),
1917                                 'id'     => 'mw-editbutton-italic',
1918                                 'open'   => '\'\'',
1919                                 'close'  => '\'\'',
1920                                 'sample' => wfMsg('italic_sample'),
1921                                 'tip'    => wfMsg('italic_tip'),
1922                                 'key'    => 'I'
1923                         ),
1924                         array(
1925                                 'image'  => $wgLang->getImageFile('button-link'),
1926                                 'id'     => 'mw-editbutton-link',
1927                                 'open'   => '[[',
1928                                 'close'  => ']]',
1929                                 'sample' => wfMsg('link_sample'),
1930                                 'tip'    => wfMsg('link_tip'),
1931                                 'key'    => 'L'
1932                         ),
1933                         array(
1934                                 'image'  => $wgLang->getImageFile('button-extlink'),
1935                                 'id'     => 'mw-editbutton-extlink',
1936                                 'open'   => '[',
1937                                 'close'  => ']',
1938                                 'sample' => wfMsg('extlink_sample'),
1939                                 'tip'    => wfMsg('extlink_tip'),
1940                                 'key'    => 'X'
1941                         ),
1942                         array(
1943                                 'image'  => $wgLang->getImageFile('button-headline'),
1944                                 'id'     => 'mw-editbutton-headline',
1945                                 'open'   => "\n== ",
1946                                 'close'  => " ==\n",
1947                                 'sample' => wfMsg('headline_sample'),
1948                                 'tip'    => wfMsg('headline_tip'),
1949                                 'key'    => 'H'
1950                         ),
1951                         array(
1952                                 'image'  => $wgLang->getImageFile('button-image'),
1953                                 'id'     => 'mw-editbutton-image',
1954                                 'open'   => '[['.$wgContLang->getNsText(NS_IMAGE).':',
1955                                 'close'  => ']]',
1956                                 'sample' => wfMsg('image_sample'),
1957                                 'tip'    => wfMsg('image_tip'),
1958                                 'key'    => 'D'
1959                         ),
1960                         array(
1961                                 'image'  => $wgLang->getImageFile('button-media'),
1962                                 'id'     => 'mw-editbutton-media',
1963                                 'open'   => '[['.$wgContLang->getNsText(NS_MEDIA).':',
1964                                 'close'  => ']]',
1965                                 'sample' => wfMsg('media_sample'),
1966                                 'tip'    => wfMsg('media_tip'),
1967                                 'key'    => 'M'
1968                         ),
1969                         array(
1970                                 'image'  => $wgLang->getImageFile('button-math'),
1971                                 'id'     => 'mw-editbutton-math',
1972                                 'open'   => "<math>",
1973                                 'close'  => "</math>",
1974                                 'sample' => wfMsg('math_sample'),
1975                                 'tip'    => wfMsg('math_tip'),
1976                                 'key'    => 'C'
1977                         ),
1978                         array(
1979                                 'image'  => $wgLang->getImageFile('button-nowiki'),
1980                                 'id'     => 'mw-editbutton-nowiki',
1981                                 'open'   => "<nowiki>",
1982                                 'close'  => "</nowiki>",
1983                                 'sample' => wfMsg('nowiki_sample'),
1984                                 'tip'    => wfMsg('nowiki_tip'),
1985                                 'key'    => 'N'
1986                         ),
1987                         array(
1988                                 'image'  => $wgLang->getImageFile('button-sig'),
1989                                 'id'     => 'mw-editbutton-signature',
1990                                 'open'   => '--~~~~',
1991                                 'close'  => '',
1992                                 'sample' => '',
1993                                 'tip'    => wfMsg('sig_tip'),
1994                                 'key'    => 'Y'
1995                         ),
1996                         array(
1997                                 'image'  => $wgLang->getImageFile('button-hr'),
1998                                 'id'     => 'mw-editbutton-hr',
1999                                 'open'   => "\n----\n",
2000                                 'close'  => '',
2001                                 'sample' => '',
2002                                 'tip'    => wfMsg('hr_tip'),
2003                                 'key'    => 'R'
2004                         )
2005                 );
2006                 $toolbar = "<div id='toolbar'>\n";
2007                 $toolbar.="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
2008
2009                 foreach($toolarray as $tool) {
2010                         $params = array(
2011                                 $image = $wgStylePath.'/common/images/'.$tool['image'],
2012                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
2013                                 // Older browsers show a "speedtip" type message only for ALT.
2014                                 // Ideally these should be different, realistically they
2015                                 // probably don't need to be.
2016                                 $tip = $tool['tip'],
2017                                 $open = $tool['open'],
2018                                 $close = $tool['close'],
2019                                 $sample = $tool['sample'],
2020                                 $cssId = $tool['id'],
2021                         );
2022
2023                         $paramList = implode( ',',
2024                                 array_map( array( 'Xml', 'encodeJsVar' ), $params ) );
2025                         $toolbar.="addButton($paramList);\n";
2026                 }
2027
2028                 $toolbar.="/*]]>*/\n</script>";
2029                 $toolbar.="\n</div>";
2030                 return $toolbar;
2031         }
2032
2033         /**
2034          * Returns an array of html code of the following checkboxes:
2035          * minor and watch
2036          *
2037          * @param $tabindex Current tabindex
2038          * @param $skin Skin object
2039          * @param $checked Array of checkbox => bool, where bool indicates the checked
2040          *                 status of the checkbox
2041          *
2042          * @return array
2043          */
2044         public static function getCheckboxes( &$tabindex, $skin, $checked ) {
2045                 global $wgUser;
2046
2047                 $checkboxes = array();
2048
2049                 $checkboxes['minor'] = '';
2050                 $minorLabel = wfMsgExt('minoredit', array('parseinline'));
2051                 if ( $wgUser->isAllowed('minoredit') ) {
2052                         $attribs = array(
2053                                 'tabindex'  => ++$tabindex,
2054                                 'accesskey' => wfMsg( 'accesskey-minoredit' ),
2055                                 'id'        => 'wpMinoredit',
2056                         );
2057                         $checkboxes['minor'] =
2058                                 Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
2059                                 "&nbsp;<label for='wpMinoredit'".$skin->tooltip('minoredit', 'withaccess').">{$minorLabel}</label>";
2060                 }
2061
2062                 $watchLabel = wfMsgExt('watchthis', array('parseinline'));
2063                 $checkboxes['watch'] = '';
2064                 if ( $wgUser->isLoggedIn() ) {
2065                         $attribs = array(
2066                                 'tabindex'  => ++$tabindex,
2067                                 'accesskey' => wfMsg( 'accesskey-watch' ),
2068                                 'id'        => 'wpWatchthis',
2069                         );
2070                         $checkboxes['watch'] =
2071                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
2072                                 "&nbsp;<label for='wpWatchthis'".$skin->tooltip('watch', 'withaccess').">{$watchLabel}</label>";
2073                 }
2074                 return $checkboxes;
2075         }
2076
2077         /**
2078          * Returns an array of html code of the following buttons:
2079          * save, diff, preview and live
2080          *
2081          * @param $tabindex Current tabindex
2082          *
2083          * @return array
2084          */
2085         public function getEditButtons(&$tabindex) {
2086                 global $wgLivePreview, $wgUser;
2087
2088                 $buttons = array();
2089
2090                 $temp = array(
2091                         'id'        => 'wpSave',
2092                         'name'      => 'wpSave',
2093                         'type'      => 'submit',
2094                         'tabindex'  => ++$tabindex,
2095                         'value'     => wfMsg('savearticle'),
2096                         'accesskey' => wfMsg('accesskey-save'),
2097                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
2098                 );
2099                 $buttons['save'] = Xml::element('input', $temp, '');
2100
2101                 ++$tabindex; // use the same for preview and live preview
2102                 if ( $wgLivePreview && $wgUser->getOption( 'uselivepreview' ) ) {
2103                         $temp = array(
2104                                 'id'        => 'wpPreview',
2105                                 'name'      => 'wpPreview',
2106                                 'type'      => 'submit',
2107                                 'tabindex'  => $tabindex,
2108                                 'value'     => wfMsg('showpreview'),
2109                                 'accesskey' => '',
2110                                 'title'     => wfMsg( 'tooltip-preview' ).' ['.wfMsg( 'accesskey-preview' ).']',
2111                                 'style'     => 'display: none;',
2112                         );
2113                         $buttons['preview'] = Xml::element('input', $temp, '');
2114
2115                         $temp = array(
2116                                 'id'        => 'wpLivePreview',
2117                                 'name'      => 'wpLivePreview',
2118                                 'type'      => 'submit',
2119                                 'tabindex'  => $tabindex,
2120                                 'value'     => wfMsg('showlivepreview'),
2121                                 'accesskey' => wfMsg('accesskey-preview'),
2122                                 'title'     => '',
2123                                 'onclick'   => $this->doLivePreviewScript(),
2124                         );
2125                         $buttons['live'] = Xml::element('input', $temp, '');
2126                 } else {
2127                         $temp = array(
2128                                 'id'        => 'wpPreview',
2129                                 'name'      => 'wpPreview',
2130                                 'type'      => 'submit',
2131                                 'tabindex'  => $tabindex,
2132                                 'value'     => wfMsg('showpreview'),
2133                                 'accesskey' => wfMsg('accesskey-preview'),
2134                                 'title'     => wfMsg( 'tooltip-preview' ).' ['.wfMsg( 'accesskey-preview' ).']',
2135                         );
2136                         $buttons['preview'] = Xml::element('input', $temp, '');
2137                         $buttons['live'] = '';
2138                 }
2139
2140                 $temp = array(
2141                         'id'        => 'wpDiff',
2142                         'name'      => 'wpDiff',
2143                         'type'      => 'submit',
2144                         'tabindex'  => ++$tabindex,
2145                         'value'     => wfMsg('showdiff'),
2146                         'accesskey' => wfMsg('accesskey-diff'),
2147                         'title'     => wfMsg( 'tooltip-diff' ).' ['.wfMsg( 'accesskey-diff' ).']',
2148                 );
2149                 $buttons['diff'] = Xml::element('input', $temp, '');
2150
2151                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons ) );
2152                 return $buttons;
2153         }
2154
2155         /**
2156          * Output preview text only. This can be sucked into the edit page
2157          * via JavaScript, and saves the server time rendering the skin as
2158          * well as theoretically being more robust on the client (doesn't
2159          * disturb the edit box's undo history, won't eat your text on
2160          * failure, etc).
2161          *
2162          * @todo This doesn't include category or interlanguage links.
2163          *       Would need to enhance it a bit, <s>maybe wrap them in XML
2164          *       or something...</s> that might also require more skin
2165          *       initialization, so check whether that's a problem.
2166          */
2167         function livePreview() {
2168                 global $wgOut;
2169                 $wgOut->disable();
2170                 header( 'Content-type: text/xml; charset=utf-8' );
2171                 header( 'Cache-control: no-cache' );
2172
2173                 $previewText = $this->getPreviewText();
2174                 #$categories = $skin->getCategoryLinks();
2175
2176                 $s =
2177                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
2178                 Xml::tags( 'livepreview', null,
2179                         Xml::element( 'preview', null, $previewText )
2180                         #.      Xml::element( 'category', null, $categories )
2181                 );
2182                 echo $s;
2183         }
2184
2185
2186         /**
2187          * Get a diff between the current contents of the edit box and the
2188          * version of the page we're editing from.
2189          *
2190          * If this is a section edit, we'll replace the section as for final
2191          * save and then make a comparison.
2192          */
2193         function showDiff() {
2194                 $oldtext = $this->mArticle->fetchContent();
2195                 $newtext = $this->mArticle->replaceSection(
2196                         $this->section, $this->textbox1, $this->summary, $this->edittime );
2197                 $newtext = $this->mArticle->preSaveTransform( $newtext );
2198                 $oldtitle = wfMsgExt( 'currentrev', array('parseinline') );
2199                 $newtitle = wfMsgExt( 'yourtext', array('parseinline') );
2200                 if ( $oldtext !== false  || $newtext != '' ) {
2201                         $de = new DifferenceEngine( $this->mTitle );
2202                         $de->setText( $oldtext, $newtext );
2203                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2204                         $de->showDiffStyle();
2205                 } else {
2206                         $difftext = '';
2207                 }
2208
2209                 global $wgOut;
2210                 $wgOut->addHtml( '<div id="wikiDiff">' . $difftext . '</div>' );
2211         }
2212
2213         /**
2214          * Filter an input field through a Unicode de-armoring process if it
2215          * came from an old browser with known broken Unicode editing issues.
2216          *
2217          * @param WebRequest $request
2218          * @param string $field
2219          * @return string
2220          * @private
2221          */
2222         function safeUnicodeInput( $request, $field ) {
2223                 $text = rtrim( $request->getText( $field ) );
2224                 return $request->getBool( 'safemode' )
2225                         ? $this->unmakesafe( $text )
2226                         : $text;
2227         }
2228
2229         /**
2230          * Filter an output field through a Unicode armoring process if it is
2231          * going to an old browser with known broken Unicode editing issues.
2232          *
2233          * @param string $text
2234          * @return string
2235          * @private
2236          */
2237         function safeUnicodeOutput( $text ) {
2238                 global $wgContLang;
2239                 $codedText = $wgContLang->recodeForEdit( $text );
2240                 return $this->checkUnicodeCompliantBrowser()
2241                         ? $codedText
2242                         : $this->makesafe( $codedText );
2243         }
2244
2245         /**
2246          * A number of web browsers are known to corrupt non-ASCII characters
2247          * in a UTF-8 text editing environment. To protect against this,
2248          * detected browsers will be served an armored version of the text,
2249          * with non-ASCII chars converted to numeric HTML character references.
2250          *
2251          * Preexisting such character references will have a 0 added to them
2252          * to ensure that round-trips do not alter the original data.
2253          *
2254          * @param string $invalue
2255          * @return string
2256          * @private
2257          */
2258         function makesafe( $invalue ) {
2259                 // Armor existing references for reversability.
2260                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
2261
2262                 $bytesleft = 0;
2263                 $result = "";
2264                 $working = 0;
2265                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2266                         $bytevalue = ord( $invalue{$i} );
2267                         if ( $bytevalue <= 0x7F ) { //0xxx xxxx
2268                                 $result .= chr( $bytevalue );
2269                                 $bytesleft = 0;
2270                         } elseif ( $bytevalue <= 0xBF ) { //10xx xxxx
2271                                 $working = $working << 6;
2272                                 $working += ($bytevalue & 0x3F);
2273                                 $bytesleft--;
2274                                 if ( $bytesleft <= 0 ) {
2275                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
2276                                 }
2277                         } elseif ( $bytevalue <= 0xDF ) { //110x xxxx
2278                                 $working = $bytevalue & 0x1F;
2279                                 $bytesleft = 1;
2280                         } elseif ( $bytevalue <= 0xEF ) { //1110 xxxx
2281                                 $working = $bytevalue & 0x0F;
2282                                 $bytesleft = 2;
2283                         } else { //1111 0xxx
2284                                 $working = $bytevalue & 0x07;
2285                                 $bytesleft = 3;
2286                         }
2287                 }
2288                 return $result;
2289         }
2290
2291         /**
2292          * Reverse the previously applied transliteration of non-ASCII characters
2293          * back to UTF-8. Used to protect data from corruption by broken web browsers
2294          * as listed in $wgBrowserBlackList.
2295          *
2296          * @param string $invalue
2297          * @return string
2298          * @private
2299          */
2300         function unmakesafe( $invalue ) {
2301                 $result = "";
2302                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2303                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
2304                                 $i += 3;
2305                                 $hexstring = "";
2306                                 do {
2307                                         $hexstring .= $invalue{$i};
2308                                         $i++;
2309                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
2310
2311                                 // Do some sanity checks. These aren't needed for reversability,
2312                                 // but should help keep the breakage down if the editor
2313                                 // breaks one of the entities whilst editing.
2314                                 if ( (substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6) ) {
2315                                         $codepoint = hexdec($hexstring);
2316                                         $result .= codepointToUtf8( $codepoint );
2317                                 } else {
2318                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
2319                                 }
2320                         } else {
2321                                 $result .= substr( $invalue, $i, 1 );
2322                         }
2323                 }
2324                 // reverse the transform that we made for reversability reasons.
2325                 return strtr( $result, array( "&#x0" => "&#x" ) );
2326         }
2327
2328         function noCreatePermission() {
2329                 global $wgOut;
2330                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
2331                 $wgOut->addWikiMsg( 'nocreatetext' );
2332         }
2333
2334         /**
2335          * If there are rows in the deletion log for this page, show them,
2336          * along with a nice little note for the user
2337          *
2338          * @param OutputPage $out
2339          */
2340         protected function showDeletionLog( $out ) {
2341                 global $wgUser;
2342                 $loglist = new LogEventsList( $wgUser->getSkin(), $out );
2343                 $pager = new LogPager( $loglist, 'delete', false, $this->mTitle->getPrefixedText() );
2344                 $count = $pager->getNumRows();
2345                 if ( $count > 0 ) {
2346                         $pager->mLimit = 10;
2347                         $out->addHtml( '<div id="mw-recreate-deleted-warn">' );
2348                         $out->addWikiMsg( 'recreate-deleted-warn' );
2349                         $out->addHTML(
2350                                 $loglist->beginLogEventsList() .
2351                                 $pager->getBody() .
2352                                 $loglist->endLogEventsList()
2353                         );
2354                         if($count > 10){
2355                                 $out->addHtml( $wgUser->getSkin()->link(
2356                                         SpecialPage::getTitleFor( 'Log' ),
2357                                         wfMsgHtml( 'deletelog-fulllog' ),
2358                                         array(),
2359                                         array(
2360                                                 'type' => 'delete',
2361                                                 'page' => $this->mTitle->getPrefixedText() ) ) );
2362                         }
2363                         $out->addHtml( '</div>' );
2364                         return true;
2365                 }
2366
2367                 return false;
2368         }
2369
2370         /**
2371          * Attempt submission
2372          * @return bool false if output is done, true if the rest of the form should be displayed
2373          */
2374         function attemptSave() {
2375                 global $wgUser, $wgOut, $wgTitle, $wgRequest;
2376
2377                 $resultDetails = false;
2378                 $value = $this->internalAttemptSave( $resultDetails, $wgUser->isAllowed('bot') && $wgRequest->getBool('bot', true) );
2379
2380                 if ( $value == self::AS_SUCCESS_UPDATE || $value == self::AS_SUCCESS_NEW_ARTICLE ) {
2381                         $this->didSave = true;
2382                 }
2383
2384                 switch ($value) {
2385                         case self::AS_HOOK_ERROR_EXPECTED:
2386                         case self::AS_CONTENT_TOO_BIG:
2387                         case self::AS_ARTICLE_WAS_DELETED:
2388                         case self::AS_CONFLICT_DETECTED:
2389                         case self::AS_SUMMARY_NEEDED:
2390                         case self::AS_TEXTBOX_EMPTY:
2391                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
2392                         case self::AS_END:
2393                                 return true;
2394
2395                         case self::AS_HOOK_ERROR:
2396                         case self::AS_FILTERING:
2397                         case self::AS_SUCCESS_NEW_ARTICLE:
2398                         case self::AS_SUCCESS_UPDATE:
2399                                 return false;
2400
2401                         case self::AS_SPAM_ERROR:
2402                                 $this->spamPage ( $resultDetails['spam'] );
2403                                 return false;
2404
2405                         case self::AS_BLOCKED_PAGE_FOR_USER:
2406                                 $this->blockedPage();
2407                                 return false;
2408
2409                         case self::AS_IMAGE_REDIRECT_ANON:
2410                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
2411                                 return false;
2412
2413                         case self::AS_READ_ONLY_PAGE_ANON:
2414                                 $this->userNotLoggedInPage();
2415                                 return false;
2416
2417                         case self::AS_READ_ONLY_PAGE_LOGGED:
2418                         case self::AS_READ_ONLY_PAGE:
2419                                 $wgOut->readOnlyPage();
2420                                 return false;
2421
2422                         case self::AS_RATE_LIMITED:
2423                                 $wgOut->rateLimited();
2424                                 return false;
2425
2426                         case self::AS_NO_CREATE_PERMISSION;
2427                                 $this->noCreatePermission();
2428                                 return;
2429
2430                         case self::AS_BLANK_ARTICLE:
2431                                 $wgOut->redirect( $wgTitle->getFullURL() );
2432                                 return false;
2433
2434                         case self::AS_IMAGE_REDIRECT_LOGGED:
2435                                 $wgOut->permissionRequired( 'upload' );
2436                                 return false;
2437                 }
2438         }
2439
2440         function getBaseRevision() {
2441                 if ( $this->mBaseRevision == false ) {
2442                         $db = wfGetDB( DB_MASTER );
2443                         $baseRevision = Revision::loadFromTimestamp(
2444                                 $db, $this->mTitle, $this->edittime );
2445                         return $this->mBaseRevision = $baseRevision;
2446                 } else {
2447                         return $this->mBaseRevision;
2448                 }
2449         }
2450 }