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         function getArticle() {
 109                 return $this->mArticle;
 110         }
 111
 112         /**
 113          * Fetch initial editing page content.
 114          * @private
 115          */
 116         function getContent( $def_text = '' ) {
 117                 global $wgOut, $wgRequest, $wgParser, $wgContLang, $wgMessageCache;
 118
 119                 wfProfileIn( __METHOD__ );
 120                 # Get variables from query string :P
 121                 $section = $wgRequest->getVal( 'section' );
 122                 $preload = $wgRequest->getVal( 'preload' );
 123                 $undoafter = $wgRequest->getVal( 'undoafter' );
 124                 $undo = $wgRequest->getVal( 'undo' );
 125
 126                 $text = '';
 127                 // For message page not locally set, use the i18n message.
 128                 // For other non-existent articles, use preload text if any.
 129                 if ( !$this->mTitle->exists() ) {
 130                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 131                                 # If this is a system message, get the default text.
 132                                 list( $message, $lang ) = $wgMessageCache->figureMessage( $wgContLang->lcfirst( $this->mTitle->getText() ) );
 133                                 $wgMessageCache->loadAllMessages( $lang );
 134                                 $text = wfMsgGetKey( $message, false, $lang, false );
 135                                 if( wfEmptyMsg( $message, $text ) )
 136                                         $text = '';
 137                         } else {
 138                                 # If requested, preload some text.
 139                                 $text = $this->getPreloadedText( $preload );
 140                         }
 141                 // For existing pages, get text based on "undo" or section parameters.
 142                 } else {
 143                         $text = $this->mArticle->getContent();
 144                         if ( $undo > 0 && $undoafter > 0 && $undo < $undoafter ) {
 145                                 # If they got undoafter and undo round the wrong way, switch them
 146                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 147                         }
 148                         if ( $undo > 0 && $undo > $undoafter ) {
 149                                 # Undoing a specific edit overrides section editing; section-editing
 150                                 # doesn't work with undoing.
 151                                 if ( $undoafter ) {
 152                                         $undorev = Revision::newFromId($undo);
 153                                         $oldrev = Revision::newFromId($undoafter);
 154                                 } else {
 155                                         $undorev = Revision::newFromId($undo);
 156                                         $oldrev = $undorev ? $undorev->getPrevious() : null;
 157                                 }
 158
 159                                 # Sanity check, make sure it's the right page,
 160                                 # the revisions exist and they were not deleted.
 161                                 # Otherwise, $text will be left as-is.
 162                                 if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 163                                         $undorev->getPage() == $oldrev->getPage() &&
 164                                         $undorev->getPage() == $this->mArticle->getID() &&
 165                                         !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 166                                         !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 167                                         $undorev_text = $undorev->getText();
 168                                         $oldrev_text = $oldrev->getText();
 169                                         $currev_text = $text;
 170
 171                                         if ( $currev_text != $undorev_text ) {
 172                                                 $result = wfMerge( $undorev_text, $oldrev_text, $currev_text, $text );
 173                                         } else {
 174                                                 # No use doing a merge if it's just a straight revert.
 175                                                 $text = $oldrev_text;
 176                                                 $result = true;
 177                                         }
 178                                         if ( $result ) {
 179                                                 # Inform the user of our success and set an automatic edit summary
 180                                                 $this->editFormPageTop .= $wgOut->parse( wfMsgNoTrans( 'undo-success' ) );
 181                                                 $firstrev = $oldrev->getNext();
 182                                                 # If we just undid one rev, use an autosummary
 183                                                 if ( $firstrev->mId == $undo ) {
 184                                                         $this->summary = wfMsgForContent('undo-summary', $undo, $undorev->getUserText());
 185                                                 }
 186                                                 $this->formtype = 'diff';
 187                                         } else {
 188                                                 # Warn the user that something went wrong
 189                                                 $this->editFormPageTop .= $wgOut->parse( wfMsgNoTrans( 'undo-failure' ) );
 190                                         }
 191                                 } else {
 192                                         // Failed basic sanity checks.
 193                                         // Older revisions may have been removed since the link
 194                                         // was created, or we may simply have got bogus input.
 195                                         $this->editFormPageTop .= $wgOut->parse( wfMsgNoTrans( 'undo-norev' ) );
 196                                 }
 197                         } else if ( $section != '' ) {
 198                                 if ( $section == 'new' ) {
 199                                         $text = $this->getPreloadedText( $preload );
 200                                 } else {
 201                                         $text = $wgParser->getSection( $text, $section, $def_text );
 202                                 }
 203                         }
 204                 }
 205
 206                 wfProfileOut( __METHOD__ );
 207                 return $text;
 208         }
 209
 210         /**
 211          * Get the contents of a page from its title and remove includeonly tags
 212          *
 213          * @param $preload String: the title of the page.
 214          * @return string The contents of the page.
 215          */
 216         protected function getPreloadedText( $preload ) {
 217                 if ( $preload === '' ) {
 218                         return '';
 219                 } else {
 220                         $preloadTitle = Title::newFromText( $preload );
 221                         if ( isset( $preloadTitle ) && $preloadTitle->userCanRead() ) {
 222                                 $rev = Revision::newFromTitle($preloadTitle);
 223                                 if ( is_object( $rev ) ) {
 224                                         $text = $rev->getText();
 225                                         // TODO FIXME: AAAAAAAAAAA, this shouldn't be implementing
 226                                         // its own mini-parser! -ævar
 227                                         $text = preg_replace( '~</?includeonly>~', '', $text );
 228                                         return $text;
 229                                 } else
 230                                         return '';
 231                         }
 232                 }
 233         }
 234
 235         /**
 236          * This is the function that extracts metadata from the article body on the first view.
 237          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
 238          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
 239          */
 240         function extractMetaDataFromArticle() {
 241                 global $wgUseMetadataEdit, $wgMetadataWhitelist, $wgContLang;
 242                 $this->mMetaData = '';
 243                 if ( !$wgUseMetadataEdit ) return;
 244                 if ( $wgMetadataWhitelist == '' ) return;
 245                 $s = '';
 246                 $t = $this->getContent();
 247
 248                 # MISSING : <nowiki> filtering
 249
 250                 # Categories and language links
 251                 $t = explode ( "\n" , $t );
 252                 $catlow = strtolower ( $wgContLang->getNsText( NS_CATEGORY ) );
 253                 $cat = $ll = array();
 254                 foreach ( $t AS $key => $x ) {
 255                         $y = trim ( strtolower ( $x ) );
 256                         while ( substr ( $y , 0 , 2 ) == '[[' ) {
 257                                 $y = explode ( ']]' , trim ( $x ) );
 258                                 $first = array_shift ( $y );
 259                                 $first = explode ( ':' , $first );
 260                                 $ns = array_shift ( $first );
 261                                 $ns = trim ( str_replace ( '[' , '' , $ns ) );
 262                                 if ( $wgContLang->getLanguageName( $ns ) || strtolower ( $ns ) == $catlow ) {
 263                                         $add = '[[' . $ns . ':' . implode ( ':' , $first ) . ']]';
 264                                         if ( strtolower ( $ns ) == $catlow ) $cat[] = $add;
 265                                         else $ll[] = $add;
 266                                         $x = implode ( ']]' , $y );
 267                                         $t[$key] = $x;
 268                                         $y = trim ( strtolower ( $x ) );
 269                                 } else {
 270                                         $x = implode ( ']]' , $y );
 271                                         $y = trim ( strtolower ( $x ) );
 272                                 }
 273                         }
 274                 }
 275                 if ( count ( $cat ) ) $s .= implode ( ' ' , $cat ) . "\n";
 276                 if ( count ( $ll ) ) $s .= implode ( ' ' , $ll ) . "\n";
 277                 $t = implode ( "\n" , $t );
 278
 279                 # Load whitelist
 280                 $sat = array () ; # stand-alone-templates; must be lowercase
 281                 $wl_title = Title::newFromText ( $wgMetadataWhitelist );
 282                 $wl_article = new Article ( $wl_title );
 283                 $wl = explode ( "\n" , $wl_article->getContent() );
 284                 foreach ( $wl AS $x ) {
 285                         $isentry = false;
 286                         $x = trim ( $x );
 287                         while ( substr ( $x , 0 , 1 ) == '*' ) {
 288                                 $isentry = true;
 289                                 $x = trim ( substr ( $x , 1 ) );
 290                         }
 291                         if ( $isentry ) {
 292                                 $sat[] = strtolower ( $x );
 293                         }
 294
 295                 }
 296
 297                 # Templates, but only some
 298                 $t = explode ( '{{' , $t );
 299                 $tl = array () ;
 300                 foreach ( $t AS $key => $x ) {
 301                         $y = explode ( '}}' , $x , 2 );
 302                         if ( count ( $y ) == 2 ) {
 303                                 $z = $y[0];
 304                                 $z = explode ( '|' , $z );
 305                                 $tn = array_shift ( $z );
 306                                 if ( in_array ( strtolower ( $tn ) , $sat ) ) {
 307                                         $tl[] = '{{' . $y[0] . '}}';
 308                                         $t[$key] = $y[1];
 309                                         $y = explode ( '}}' , $y[1] , 2 );
 310                                 }
 311                                 else $t[$key] = '{{' . $x;
 312                         }
 313                         else if ( $key != 0 ) $t[$key] = '{{' . $x;
 314                         else $t[$key] = $x;
 315                 }
 316                 if ( count ( $tl ) ) $s .= implode ( ' ' , $tl );
 317                 $t = implode ( '' , $t );
 318
 319                 $t = str_replace ( "\n\n\n" , "\n" , $t );
 320                 $this->mArticle->mContent = $t;
 321                 $this->mMetaData = $s;
 322         }
 323
 324         /*
 325          * Check if a page was deleted while the user was editing it, before submit.
 326          * Note that we rely on the logging table, which hasn't been always there,
 327          * but that doesn't matter, because this only applies to brand new
 328          * deletes.
 329          */
 330         protected function wasDeletedSinceLastEdit() {
 331                 if ( $this->deletedSinceEdit )
 332                         return true;
 333                 if ( $this->mTitle->isDeleted() ) {
 334                         $this->lastDelete = $this->getLastDelete();
 335                         if ( $this->lastDelete ) {
 336                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
 337                                 if ( $deleteTime > $this->starttime ) {
 338                                         $this->deletedSinceEdit = true;
 339                                 }
 340                         }
 341                 }
 342                 return $this->deletedSinceEdit;
 343         }
 344
 345         function submit() {
 346                 $this->edit();
 347         }
 348
 349         /**
 350          * This is the function that gets called for "action=edit". It
 351          * sets up various member variables, then passes execution to
 352          * another function, usually showEditForm()
 353          *
 354          * The edit form is self-submitting, so that when things like
 355          * preview and edit conflicts occur, we get the same form back
 356          * with the extra stuff added.  Only when the final submission
 357          * is made and all is well do we actually save and redirect to
 358          * the newly-edited page.
 359          */
 360         function edit() {
 361                 global $wgOut, $wgUser, $wgRequest;
 362                 // Allow extensions to modify/prevent this form or submission
 363                 if ( !wfRunHooks( 'AlternateEdit', array( &$this ) ) ) {
 364                         return;
 365                 }
 366
 367                 wfProfileIn( __METHOD__ );
 368                 wfDebug( __METHOD__.": enter\n" );
 369
 370                 // This is not an article
 371                 $wgOut->setArticleFlag( false );
 372
 373                 $this->importFormData( $wgRequest );
 374                 $this->firsttime = false;
 375
 376                 if ( $this->live ) {
 377                         $this->livePreview();
 378                         wfProfileOut( __METHOD__ );
 379                         return;
 380                 }
 381
 382                 if ( wfReadOnly() && $this->save ) {
 383                                 // Force preview
 384                                 $this->save = false;
 385                                 $this->preview = true;
 386                 }
 387
 388                 $wgOut->addScriptFile( 'edit.js' );
 389                 $permErrors = $this->getEditPermissionErrors();
 390                 if ( $permErrors ) {
 391                         wfDebug( __METHOD__.": User can't edit\n" );
 392                         $this->readOnlyPage( $this->getContent(), true, $permErrors, 'edit' );
 393                         wfProfileOut( __METHOD__ );
 394                         return;
 395                 } else {
 396                         if ( $this->save ) {
 397                                 $this->formtype = 'save';
 398                         } else if ( $this->preview ) {
 399                                 $this->formtype = 'preview';
 400                         } else if ( $this->diff ) {
 401                                 $this->formtype = 'diff';
 402                         } else { # First time through
 403                                 $this->firsttime = true;
 404                                 if ( $this->previewOnOpen() ) {
 405                                         $this->formtype = 'preview';
 406                                 } else {
 407                                         $this->extractMetaDataFromArticle () ;
 408                                         $this->formtype = 'initial';
 409                                 }
 410                         }
 411                 }
 412
 413                 wfProfileIn( __METHOD__."-business-end" );
 414
 415                 $this->isConflict = false;
 416                 // css / js subpages of user pages get a special treatment
 417                 $this->isCssJsSubpage      = $this->mTitle->isCssJsSubpage();
 418                 $this->isValidCssJsSubpage = $this->mTitle->isValidCssJsSubpage();
 419
 420                 # Show applicable editing introductions
 421                 if ( $this->formtype == 'initial' || $this->firsttime )
 422                         $this->showIntro();
 423
 424                 if ( $this->mTitle->isTalkPage() ) {
 425                         $wgOut->addWikiMsg( 'talkpagetext' );
 426                 }
 427
 428                 # Optional notices on a per-namespace and per-page basis
 429                 $editnotice_ns   = 'editnotice-'.$this->mTitle->getNamespace();
 430                 $editnotice_page = $editnotice_ns.'-'.$this->mTitle->getDBkey();
 431                 if ( !wfEmptyMsg( $editnotice_ns, wfMsgForContent( $editnotice_ns ) ) ) {
 432                         $wgOut->addWikiText( wfMsgForContent( $editnotice_ns )  );
 433                 }
 434                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
 435                         $parts = explode( '/', $this->mTitle->getDBkey() );
 436                         $editnotice_base = $editnotice_ns;
 437                         while ( count( $parts ) > 0 ) {
 438                                 $editnotice_base .= '-'.array_shift( $parts );
 439                                 if ( !wfEmptyMsg( $editnotice_base, wfMsgForContent( $editnotice_base ) ) ) {
 440                                         $wgOut->addWikiText( wfMsgForContent( $editnotice_base )  );
 441                                 }
 442                         }
 443                 } else if ( !wfEmptyMsg( $editnotice_page, wfMsgForContent( $editnotice_page ) ) ) {
 444                         $wgOut->addWikiText( wfMsgForContent( $editnotice_page ) );
 445                 }
 446
 447                 # Attempt submission here.  This will check for edit conflicts,
 448                 # and redundantly check for locked database, blocked IPs, etc.
 449                 # that edit() already checked just in case someone tries to sneak
 450                 # in the back door with a hand-edited submission URL.
 451
 452                 if ( 'save' == $this->formtype ) {
 453                         if ( !$this->attemptSave() ) {
 454                                 wfProfileOut( __METHOD__."-business-end" );
 455                                 wfProfileOut( __METHOD__ );
 456                                 return;
 457                         }
 458                 }
 459
 460                 # First time through: get contents, set time for conflict
 461                 # checking, etc.
 462                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 463                         if ( $this->initialiseForm() === false) {
 464                                 $this->noSuchSectionPage();
 465                                 wfProfileOut( __METHOD__."-business-end" );
 466                                 wfProfileOut( __METHOD__ );
 467                                 return;
 468                         }
 469                         if ( !$this->mTitle->getArticleId() )
 470                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 471                 }
 472
 473                 $this->showEditForm();
 474                 wfProfileOut( __METHOD__."-business-end" );
 475                 wfProfileOut( __METHOD__ );
 476         }
 477
 478         protected function getEditPermissionErrors() {
 479                 global $wgUser;
 480                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 481                 # Can this title be created?
 482                 if ( !$this->mTitle->exists() ) {
 483                         $permErrors = array_merge( $permErrors,
 484                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 485                 }
 486                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 487                 $remove = array();
 488                 foreach( $permErrors as $error ) {
 489                         if ( ($this->preview || $this->diff) &&
 490                                 ($error[0] == 'blockedtext' || $error[0] == 'autoblockedtext') )
 491                         {
 492                                 $remove[] = $error;
 493                         }
 494                 }
 495                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 496                 return $permErrors;
 497         }
 498
 499         /**
 500          * Show a read-only error
 501          * Parameters are the same as OutputPage:readOnlyPage()
 502          * Redirect to the article page if redlink=1
 503          */
 504         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 505                 global $wgRequest, $wgOut;
 506                 if ( $wgRequest->getBool( 'redlink' ) ) {
 507                         // The edit page was reached via a red link.
 508                         // Redirect to the article page and let them click the edit tab if
 509                         // they really want a permission error.
 510                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 511                 } else {
 512                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 513                 }
 514         }
 515
 516         /**
 517          * Should we show a preview when the edit form is first shown?
 518          *
 519          * @return bool
 520          */
 521         protected function previewOnOpen() {
 522                 global $wgRequest, $wgUser;
 523                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 524                         // Explicit override from request
 525                         return true;
 526                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 527                         // Explicit override from request
 528                         return false;
 529                 } elseif ( $this->section == 'new' ) {
 530                         // Nothing *to* preview for new sections
 531                         return false;
 532                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== '' || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 533                         // Standard preference behaviour
 534                         return true;
 535                 } elseif ( !$this->mTitle->exists() && $this->mTitle->getNamespace() == NS_CATEGORY ) {
 536                         // Categories are special
 537                         return true;
 538                 } else {
 539                         return false;
 540                 }
 541         }
 542
 543         /**
 544          * @todo document
 545          * @param $request
 546          */
 547         function importFormData( &$request ) {
 548                 global $wgLang, $wgUser;
 549
 550                 wfProfileIn( __METHOD__ );
 551
 552                 # Section edit can come from either the form or a link
 553                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 554
 555                 if ( $request->wasPosted() ) {
 556                         # These fields need to be checked for encoding.
 557                         # Also remove trailing whitespace, but don't remove _initial_
 558                         # whitespace from the text boxes. This may be significant formatting.
 559                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 560                         $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
 561                         $this->mMetaData = rtrim( $request->getText( 'metadata' ) );
 562                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 563                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary'  ), 250 );
 564
 565                         # Remove extra headings from summaries and new sections.
 566                         $this->summary = preg_replace('/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary);
 567
 568                         $this->edittime = $request->getVal( 'wpEdittime' );
 569                         $this->starttime = $request->getVal( 'wpStarttime' );
 570
 571                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 572
 573                         if ( is_null( $this->edittime ) ) {
 574                                 # If the form is incomplete, force to preview.
 575                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 576                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 577                                 $this->preview  = true;
 578                         } else {
 579                                 /* Fallback for live preview */
 580                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 581                                 $this->diff = $request->getCheck( 'wpDiff' );
 582
 583                                 // Remember whether a save was requested, so we can indicate
 584                                 // if we forced preview due to session failure.
 585                                 $this->mTriedSave = !$this->preview;
 586
 587                                 if ( $this->tokenOk( $request ) ) {
 588                                         # Some browsers will not report any submit button
 589                                         # if the user hits enter in the comment box.
 590                                         # The unmarked state will be assumed to be a save,
 591                                         # if the form seems otherwise complete.
 592                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 593                                 } else if ( $this->diff ) {
 594                                         # Failed token check, but only requested "Show Changes".
 595                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 596                                 } else {
 597                                         # Page might be a hack attempt posted from
 598                                         # an external site. Preview instead of saving.
 599                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 600                                         $this->preview = true;
 601                                 }
 602                         }
 603                         $this->save = !$this->preview && !$this->diff;
 604                         if ( !preg_match( '/^\d{14}$/', $this->edittime )) {
 605                                 $this->edittime = null;
 606                         }
 607
 608                         if ( !preg_match( '/^\d{14}$/', $this->starttime )) {
 609                                 $this->starttime = null;
 610                         }
 611
 612                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 613
 614                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 615                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 616
 617                         # Don't force edit summaries when a user is editing their own user or talk page
 618                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 619                                 $this->mTitle->getText() == $wgUser->getName() )
 620                         {
 621                                 $this->allowBlankSummary = true;
 622                         } else {
 623                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary');
 624                         }
 625
 626                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 627                 } else {
 628                         # Not a posted form? Start with nothing.
 629                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 630                         $this->textbox1  = '';
 631                         $this->textbox2  = '';
 632                         $this->mMetaData = '';
 633                         $this->summary   = '';
 634                         $this->edittime  = '';
 635                         $this->starttime = wfTimestampNow();
 636                         $this->edit      = false;
 637                         $this->preview   = false;
 638                         $this->save      = false;
 639                         $this->diff      = false;
 640                         $this->minoredit = false;
 641                         $this->watchthis = false;
 642                         $this->recreate  = false;
 643
 644                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 645                                 $this->summary = $request->getVal( 'preloadtitle' );
 646                         }
 647                 }
 648
 649                 $this->oldid = $request->getInt( 'oldid' );
 650
 651                 $this->live = $request->getCheck( 'live' );
 652                 $this->editintro = $request->getText( 'editintro' );
 653
 654                 wfProfileOut( __METHOD__ );
 655         }
 656
 657         /**
 658          * Make sure the form isn't faking a user's credentials.
 659          *
 660          * @param $request WebRequest
 661          * @return bool
 662          * @private
 663          */
 664         function tokenOk( &$request ) {
 665                 global $wgUser;
 666                 $token = $request->getVal( 'wpEditToken' );
 667                 $this->mTokenOk = $wgUser->matchEditToken( $token );
 668                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
 669                 return $this->mTokenOk;
 670         }
 671
 672         /**
 673          * Show all applicable editing introductions
 674          */
 675         protected function showIntro() {
 676                 global $wgOut, $wgUser;
 677                 if ( $this->suppressIntro ) {
 678                         return;
 679                 }
 680                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exists
 681                 if ( $this->mTitle->getNamespace() == NS_USER || $this->mTitle->getNamespace() == NS_USER_TALK ) {
 682                         $parts = explode( '/', $this->mTitle->getText(), 2 );
 683                         $username = $parts[0];
 684                         $id = User::idFromName( $username );
 685                         $ip = User::isIP( $username );
 686                         if ( $id == 0 && !$ip ) {
 687                                 $wgOut->wrapWikiMsg( '<div class="mw-userpage-userdoesnotexist error">$1</div>',
 688                                         array( 'userpage-userdoesnotexist', $username ) );
 689                         }
 690                 }
 691                 # Try to add a custom edit intro, or use the standard one if this is not possible.
 692                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
 693                         if ( $wgUser->isLoggedIn() ) {
 694                                 $wgOut->wrapWikiMsg( '<div class="mw-newarticletext">$1</div>', 'newarticletext' );
 695                         } else {
 696                                 $wgOut->wrapWikiMsg( '<div class="mw-newarticletextanon">$1</div>', 'newarticletextanon' );
 697                         }
 698                 }
 699                 # Give a notice if the user is editing a deleted page...
 700                 if ( !$this->mTitle->exists() ) {
 701                         $this->showDeletionLog( $wgOut );
 702                 }
 703         }
 704
 705         /**
 706          * Attempt to show a custom editing introduction, if supplied
 707          *
 708          * @return bool
 709          */
 710         protected function showCustomIntro() {
 711                 if ( $this->editintro ) {
 712                         $title = Title::newFromText( $this->editintro );
 713                         if ( $title instanceof Title && $title->exists() && $title->userCanRead() ) {
 714                                 global $wgOut;
 715                                 $revision = Revision::newFromTitle( $title );
 716                                 $wgOut->addWikiTextTitleTidy( $revision->getText(), $this->mTitle );
 717                                 return true;
 718                         } else {
 719                                 return false;
 720                         }
 721                 } else {
 722                         return false;
 723                 }
 724         }
 725
 726         /**
 727          * Attempt submission (no UI)
 728          * @return one of the constants describing the result
 729          */
 730         function internalAttemptSave( &$result, $bot = false ) {
 731                 global $wgFilterCallback, $wgUser, $wgOut, $wgParser;
 732                 global $wgMaxArticleSize;
 733
 734                 wfProfileIn( __METHOD__ );
 735                 wfProfileIn( __METHOD__ . '-checks' );
 736
 737                 if ( !wfRunHooks( 'EditPage::attemptSave', array( &$this ) ) )
 738                 {
 739                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving" );
 740                         return self::AS_HOOK_ERROR;
 741                 }
 742
 743                 # Check image redirect
 744                 if ( $this->mTitle->getNamespace() == NS_FILE &&
 745                         Title::newFromRedirect( $this->textbox1 ) instanceof Title &&
 746                         !$wgUser->isAllowed( 'upload' ) ) {
 747                                 if ( $wgUser->isAnon() ) {
 748                                         return self::AS_IMAGE_REDIRECT_ANON;
 749                                 } else {
 750                                         return self::AS_IMAGE_REDIRECT_LOGGED;
 751                                 }
 752                 }
 753
 754                 # Reintegrate metadata
 755                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 756                 $this->mMetaData = '' ;
 757
 758                 # Check for spam
 759                 $match = self::matchSpamRegex( $this->summary );
 760                 if ( $match === false ) {
 761                         $match = self::matchSpamRegex( $this->textbox1 );
 762                 }
 763                 if ( $match !== false ) {
 764                         $result['spam'] = $match;
 765                         $ip = wfGetIP();
 766                         $pdbk = $this->mTitle->getPrefixedDBkey();
 767                         $match = str_replace( "\n", '', $match );
 768                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
 769                         wfProfileOut( __METHOD__ . '-checks' );
 770                         wfProfileOut( __METHOD__ );
 771                         return self::AS_SPAM_ERROR;
 772                 }
 773                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
 774                         # Error messages or other handling should be performed by the filter function
 775                         wfProfileOut( __METHOD__ . '-checks' );
 776                         wfProfileOut( __METHOD__ );
 777                         return self::AS_FILTERING;
 778                 }
 779                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
 780                         # Error messages etc. could be handled within the hook...
 781                         wfProfileOut( __METHOD__ . '-checks' );
 782                         wfProfileOut( __METHOD__ );
 783                         return self::AS_HOOK_ERROR;
 784                 } elseif ( $this->hookError != '' ) {
 785                         # ...or the hook could be expecting us to produce an error
 786                         wfProfileOut( __METHOD__ . '-checks' );
 787                         wfProfileOut( __METHOD__ );
 788                         return self::AS_HOOK_ERROR_EXPECTED;
 789                 }
 790                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 791                         # Check block state against master, thus 'false'.
 792                         wfProfileOut( __METHOD__ . '-checks' );
 793                         wfProfileOut( __METHOD__ );
 794                         return self::AS_BLOCKED_PAGE_FOR_USER;
 795                 }
 796                 $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 797                 if ( $this->kblength > $wgMaxArticleSize ) {
 798                         // Error will be displayed by showEditForm()
 799                         $this->tooBig = true;
 800                         wfProfileOut( __METHOD__ . '-checks' );
 801                         wfProfileOut( __METHOD__ );
 802                         return self::AS_CONTENT_TOO_BIG;
 803                 }
 804
 805                 if ( !$wgUser->isAllowed('edit') ) {
 806                         if ( $wgUser->isAnon() ) {
 807                                 wfProfileOut( __METHOD__ . '-checks' );
 808                                 wfProfileOut( __METHOD__ );
 809                                 return self::AS_READ_ONLY_PAGE_ANON;
 810                         }
 811                         else {
 812                                 wfProfileOut( __METHOD__ . '-checks' );
 813                                 wfProfileOut( __METHOD__ );
 814                                 return self::AS_READ_ONLY_PAGE_LOGGED;
 815                         }
 816                 }
 817
 818                 if ( wfReadOnly() ) {
 819                         wfProfileOut( __METHOD__ . '-checks' );
 820                         wfProfileOut( __METHOD__ );
 821                         return self::AS_READ_ONLY_PAGE;
 822                 }
 823                 if ( $wgUser->pingLimiter() ) {
 824                         wfProfileOut( __METHOD__ . '-checks' );
 825                         wfProfileOut( __METHOD__ );
 826                         return self::AS_RATE_LIMITED;
 827                 }
 828
 829                 # If the article has been deleted while editing, don't save it without
 830                 # confirmation
 831                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
 832                         wfProfileOut( __METHOD__ . '-checks' );
 833                         wfProfileOut( __METHOD__ );
 834                         return self::AS_ARTICLE_WAS_DELETED;
 835                 }
 836
 837                 wfProfileOut( __METHOD__ . '-checks' );
 838
 839                 # If article is new, insert it.
 840                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 841                 if ( 0 == $aid ) {
 842                         // Late check for create permission, just in case *PARANOIA*
 843                         if ( !$this->mTitle->userCan( 'create' ) ) {
 844                                 wfDebug( __METHOD__ . ": no create permission\n" );
 845                                 wfProfileOut( __METHOD__ );
 846                                 return self::AS_NO_CREATE_PERMISSION;
 847                         }
 848
 849                         # Don't save a new article if it's blank.
 850                         if ( '' == $this->textbox1 ) {
 851                                 wfProfileOut( __METHOD__ );
 852                                 return self::AS_BLANK_ARTICLE;
 853                         }
 854
 855                         // Run post-section-merge edit filter
 856                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
 857                                 # Error messages etc. could be handled within the hook...
 858                                 wfProfileOut( __METHOD__ );
 859                                 return self::AS_HOOK_ERROR;
 860                         }
 861
 862                         $isComment = ( $this->section == 'new' );
 863
 864                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 865                                 $this->minoredit, $this->watchthis, false, $isComment, $bot);
 866
 867                         wfProfileOut( __METHOD__ );
 868                         return self::AS_SUCCESS_NEW_ARTICLE;
 869                 }
 870
 871                 # Article exists. Check for edit conflict.
 872
 873                 $this->mArticle->clear(); # Force reload of dates, etc.
 874                 $this->mArticle->forUpdate( true ); # Lock the article
 875
 876                 wfDebug("timestamp: {$this->mArticle->getTimestamp()}, edittime: {$this->edittime}\n");
 877
 878                 if ( $this->mArticle->getTimestamp() != $this->edittime ) {
 879                         $this->isConflict = true;
 880                         if ( $this->section == 'new' ) {
 881                                 if ( $this->mArticle->getUserText() == $wgUser->getName() &&
 882                                         $this->mArticle->getComment() == $this->summary ) {
 883                                         // Probably a duplicate submission of a new comment.
 884                                         // This can happen when squid resends a request after
 885                                         // a timeout but the first one actually went through.
 886                                         wfDebug( "EditPage::editForm duplicate new section submission; trigger edit conflict!\n" );
 887                                 } else {
 888                                         // New comment; suppress conflict.
 889                                         $this->isConflict = false;
 890                                         wfDebug( "EditPage::editForm conflict suppressed; new section\n" );
 891                                 }
 892                         }
 893                 }
 894                 $userid = $wgUser->getId();
 895
 896                 if ( $this->isConflict ) {
 897                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 898                                 $this->mArticle->getTimestamp() . "')\n" );
 899                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime);
 900                 }
 901                 else {
 902                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 903                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary);
 904                 }
 905                 if ( is_null( $text ) ) {
 906                         wfDebug( "EditPage::editForm activating conflict; section replace failed.\n" );
 907                         $this->isConflict = true;
 908                         $text = $this->textbox1;
 909                 }
 910
 911                 # Suppress edit conflict with self, except for section edits where merging is required.
 912                 if ( $this->section == '' && $userid && $this->userWasLastToEdit($userid,$this->edittime) ) {
 913                         wfDebug( "EditPage::editForm Suppressing edit conflict, same user.\n" );
 914                         $this->isConflict = false;
 915                 } else {
 916                         # switch from section editing to normal editing in edit conflict
 917                         if ( $this->isConflict ) {
 918                                 # Attempt merge
 919                                 if ( $this->mergeChangesInto( $text ) ) {
 920                                         // Successful merge! Maybe we should tell the user the good news?
 921                                         $this->isConflict = false;
 922                                         wfDebug( "EditPage::editForm Suppressing edit conflict, successful merge.\n" );
 923                                 } else {
 924                                         $this->section = '';
 925                                         $this->textbox1 = $text;
 926                                         wfDebug( "EditPage::editForm Keeping edit conflict, failed merge.\n" );
 927                                 }
 928                         }
 929                 }
 930
 931                 if ( $this->isConflict ) {
 932                         wfProfileOut( __METHOD__ );
 933                         return self::AS_CONFLICT_DETECTED;
 934                 }
 935
 936                 $oldtext = $this->mArticle->getContent();
 937
 938                 // Run post-section-merge edit filter
 939                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$this->hookError, $this->summary ) ) ) {
 940                         # Error messages etc. could be handled within the hook...
 941                         wfProfileOut( __METHOD__ );
 942                         return self::AS_HOOK_ERROR;
 943                 }
 944
 945                 # Handle the user preference to force summaries here, but not for null edits
 946                 if ( $this->section != 'new' && !$this->allowBlankSummary && 0 != strcmp($oldtext, $text) &&
 947                         !is_object( Title::newFromRedirect( $text ) ) # check if it's not a redirect
 948                 ) {
 949                         if ( md5( $this->summary ) == $this->autoSumm ) {
 950                                 $this->missingSummary = true;
 951                                 wfProfileOut( __METHOD__ );
 952                                 return self::AS_SUMMARY_NEEDED;
 953                         }
 954                 }
 955
 956                 # And a similar thing for new sections
 957                 if ( $this->section == 'new' && !$this->allowBlankSummary ) {
 958                         if (trim($this->summary) == '') {
 959                                 $this->missingSummary = true;
 960                                 wfProfileOut( __METHOD__ );
 961                                 return self::AS_SUMMARY_NEEDED;
 962                         }
 963                 }
 964
 965                 # All's well
 966                 wfProfileIn( __METHOD__ . '-sectionanchor' );
 967                 $sectionanchor = '';
 968                 if ( $this->section == 'new' ) {
 969                         if ( $this->textbox1 == '' ) {
 970                                 $this->missingComment = true;
 971                                 return self::AS_TEXTBOX_EMPTY;
 972                         }
 973                         if ( $this->summary != '' ) {
 974                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $this->summary );
 975                                 # This is a new section, so create a link to the new section
 976                                 # in the revision summary.
 977                                 $cleanSummary = $wgParser->stripSectionName( $this->summary );
 978                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
 979                         }
 980                 } elseif ( $this->section != '' ) {
 981                         # Try to get a section anchor from the section source, redirect to edited section if header found
 982                         # XXX: might be better to integrate this into Article::replaceSection
 983                         # for duplicate heading checking and maybe parsing
 984                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 985                         # we can't deal with anchors, includes, html etc in the header for now,
 986                         # headline would need to be parsed to improve this
 987                         if ( $hasmatch and strlen($matches[2]) > 0 ) {
 988                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $matches[2] );
 989                         }
 990                 }
 991                 wfProfileOut( __METHOD__ . '-sectionanchor' );
 992
 993                 // Save errors may fall down to the edit form, but we've now
 994                 // merged the section into full text. Clear the section field
 995                 // so that later submission of conflict forms won't try to
 996                 // replace that into a duplicated mess.
 997                 $this->textbox1 = $text;
 998                 $this->section = '';
 999
1000                 // Check for length errors again now that the section is merged in
1001                 $this->kblength = (int)(strlen( $text ) / 1024);
1002                 if ( $this->kblength > $wgMaxArticleSize ) {
1003                         $this->tooBig = true;
1004                         wfProfileOut( __METHOD__ );
1005                         return self::AS_MAX_ARTICLE_SIZE_EXCEEDED;
1006                 }
1007
1008                 # update the article here
1009                 if ( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
1010                         $this->watchthis, $bot, $sectionanchor ) ) {
1011                         wfProfileOut( __METHOD__ );
1012                         return self::AS_SUCCESS_UPDATE;
1013                 } else {
1014                         $this->isConflict = true;
1015                 }
1016                 wfProfileOut( __METHOD__ );
1017                 return self::AS_END;
1018         }
1019
1020         /**
1021          * Check if no edits were made by other users since
1022          * the time a user started editing the page. Limit to
1023          * 50 revisions for the sake of performance.
1024          */
1025         protected function userWasLastToEdit( $id, $edittime ) {
1026                 $dbw = wfGetDB( DB_MASTER );
1027                 $res = $dbw->select( 'revision',
1028                         'rev_user',
1029                         array(
1030                                 'rev_page' => $this->mArticle->getId(),
1031                                 'rev_timestamp > '.$dbw->addQuotes( $dbw->timestamp($edittime) )
1032                         ),
1033                         __METHOD__,
1034                         array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
1035                 while( $row = $res->fetchObject() ) {
1036                         if( $row->rev_user != $id ) {
1037                                 return false;
1038                         }
1039                 }
1040                 return true;
1041         }
1042
1043         /**
1044          * Check given input text against $wgSpamRegex, and return the text of the first match.
1045          * @return mixed -- matching string or false
1046          */
1047         public static function matchSpamRegex( $text ) {
1048                 global $wgSpamRegex;
1049                 if ( $wgSpamRegex ) {
1050                         // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1051                         $regexes = (array)$wgSpamRegex;
1052                         foreach( $regexes as $regex ) {
1053                                 $matches = array();
1054                                 if ( preg_match( $regex, $text, $matches ) ) {
1055                                         return $matches[0];
1056                                 }
1057                         }
1058                 }
1059                 return false;
1060         }
1061
1062         /**
1063          * Initialise form fields in the object
1064          * Called on the first invocation, e.g. when a user clicks an edit link
1065          */
1066         function initialiseForm() {
1067                 $this->edittime = $this->mArticle->getTimestamp();
1068                 $this->textbox1 = $this->getContent( false );
1069                 if ( $this->textbox1 === false ) return false;
1070                 wfProxyCheck();
1071                 return true;
1072         }
1073
1074         function setHeaders() {
1075                 global $wgOut, $wgTitle;
1076                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1077                 if ( $this->formtype == 'preview' ) {
1078                         $wgOut->setPageTitleActionText( wfMsg( 'preview' ) );
1079                 }
1080                 if ( $this->isConflict ) {
1081                         $wgOut->setPageTitle( wfMsg( 'editconflict', $wgTitle->getPrefixedText() ) );
1082                 } elseif ( $this->section != '' ) {
1083                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1084                         $wgOut->setPageTitle( wfMsg( $msg, $wgTitle->getPrefixedText() ) );
1085                 } else {
1086                         # Use the title defined by DISPLAYTITLE magic word when present
1087                         if ( isset( $this->mParserOutput )
1088                          && ( $dt = $this->mParserOutput->getDisplayTitle() ) !== false ) {
1089                                 $title = $dt;
1090                         } else {
1091                                 $title = $wgTitle->getPrefixedText();
1092                         }
1093                         $wgOut->setPageTitle( wfMsg( 'editing', $title ) );
1094                 }
1095         }
1096
1097         /**
1098          * Send the edit form and related headers to $wgOut
1099          * @param $formCallback Optional callable that takes an OutputPage
1100          *                      parameter; will be called during form output
1101          *                      near the top, for captchas and the like.
1102          */
1103         function showEditForm( $formCallback=null ) {
1104                 global $wgOut, $wgUser, $wgLang, $wgContLang, $wgMaxArticleSize, $wgTitle, $wgRequest;
1105
1106                 # If $wgTitle is null, that means we're in API mode.
1107                 # Some hook probably called this function  without checking
1108                 # for is_null($wgTitle) first. Bail out right here so we don't
1109                 # do lots of work just to discard it right after.
1110                 if ( is_null( $wgTitle ) )
1111                         return;
1112
1113                 wfProfileIn( __METHOD__ );
1114
1115                 $sk = $wgUser->getSkin();
1116
1117                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) ) ;
1118
1119                 #need to parse the preview early so that we know which templates are used,
1120                 #otherwise users with "show preview after edit box" will get a blank list
1121                 #we parse this near the beginning so that setHeaders can do the title
1122                 #setting work instead of leaving it in getPreviewText
1123                 $previewOutput = '';
1124                 if ( $this->formtype == 'preview' ) {
1125                         $previewOutput = $this->getPreviewText();
1126                 }
1127
1128                 $this->setHeaders();
1129
1130                 # Enabled article-related sidebar, toplinks, etc.
1131                 $wgOut->setArticleRelated( true );
1132
1133                 if ( $this->isConflict ) {
1134                         $wgOut->addWikiMsg( 'explainconflict' );
1135
1136                         $this->textbox2 = $this->textbox1;
1137                         $this->textbox1 = $this->getContent();
1138                         $this->edittime = $this->mArticle->getTimestamp();
1139                 } else {
1140                         if ( $this->section != '' && $this->section != 'new' ) {
1141                                 $matches = array();
1142                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
1143                                         preg_match( "/^(=+)(.+)\\1/mi",
1144                                                 $this->textbox1,
1145                                                 $matches );
1146                                         if ( !empty( $matches[2] ) ) {
1147                                                 global $wgParser;
1148                                                 $this->summary = "/* " .
1149                                                         $wgParser->stripSectionName(trim($matches[2])) .
1150                                                         " */ ";
1151                                         }
1152                                 }
1153                         }
1154
1155                         if ( $this->missingComment ) {
1156                                 $wgOut->wrapWikiMsg( '<div id="mw-missingcommenttext">$1</div>',  'missingcommenttext' );
1157                         }
1158
1159                         if ( $this->missingSummary && $this->section != 'new' ) {
1160                                 $wgOut->wrapWikiMsg( '<div id="mw-missingsummary">$1</div>', 'missingsummary' );
1161                         }
1162
1163                         if ( $this->missingSummary && $this->section == 'new' ) {
1164                                 $wgOut->wrapWikiMsg( '<div id="mw-missingcommentheader">$1</div>', 'missingcommentheader' );
1165                         }
1166
1167                         if ( $this->hookError !== '' ) {
1168                                 $wgOut->addWikiText( $this->hookError );
1169                         }
1170
1171                         if ( !$this->checkUnicodeCompliantBrowser() ) {
1172                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
1173                         }
1174                         if ( isset( $this->mArticle ) && isset( $this->mArticle->mRevision ) ) {
1175                         // Let sysop know that this will make private content public if saved
1176
1177                                 if ( !$this->mArticle->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1178                                         $wgOut->addWikiMsg( 'rev-deleted-text-permission' );
1179                                 } else if ( $this->mArticle->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1180                                         $wgOut->addWikiMsg( 'rev-deleted-text-view' );
1181                                 }
1182
1183                                 if ( !$this->mArticle->mRevision->isCurrent() ) {
1184                                         $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
1185                                         $wgOut->addWikiMsg( 'editingold' );
1186                                 }
1187                         }
1188                 }
1189
1190                 if ( wfReadOnly() ) {
1191                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
1192                 } elseif ( $wgUser->isAnon() && $this->formtype != 'preview' ) {
1193                         $wgOut->wrapWikiMsg( '<div id="mw-anon-edit-warning">$1</div>', 'anoneditwarning' );
1194                 } else {
1195                         if ( $this->isCssJsSubpage ) {
1196                                 # Check the skin exists
1197                                 if ( $this->isValidCssJsSubpage ) {
1198                                         if ( $this->formtype !== 'preview' ) {
1199                                                 $wgOut->addWikiMsg( 'usercssjsyoucanpreview' );
1200                                         }
1201                                 } else {
1202                                         $wgOut->addWikiMsg( 'userinvalidcssjstitle', $wgTitle->getSkinFromCssJsSubpage() );
1203                                 }
1204                         }
1205                 }
1206
1207                 $classes = array(); // Textarea CSS
1208                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1209                         # Show a warning if editing an interface message
1210                         $wgOut->addWikiMsg( 'editinginterface' );
1211                 } elseif ( $this->mTitle->isProtected( 'edit' ) ) {
1212                         # Is the title semi-protected?
1213                         if ( $this->mTitle->isSemiProtected() ) {
1214                                 $noticeMsg = 'semiprotectedpagewarning';
1215                                 $classes[] = 'mw-textarea-sprotected';
1216                         } else {
1217                                 # Then it must be protected based on static groups (regular)
1218                                 $noticeMsg = 'protectedpagewarning';
1219                                 $classes[] = 'mw-textarea-protected';
1220                         }
1221                         $wgOut->addHTML( "<div class='mw-warning-with-logexcerpt'>\n" );
1222                         $wgOut->addWikiMsg( $noticeMsg );
1223                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle->getPrefixedText(), '', 1 );
1224                         $wgOut->addHTML( "</div>\n" );
1225                 }
1226                 if ( $this->mTitle->isCascadeProtected() ) {
1227                         # Is this page under cascading protection from some source pages?
1228                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
1229                         $notice = "$1\n";
1230                         if ( count($cascadeSources) > 0 ) {
1231                                 # Explain, and list the titles responsible
1232                                 foreach( $cascadeSources as $page ) {
1233                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
1234                                 }
1235                         }
1236                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', count($cascadeSources) ) );
1237                 }
1238                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
1239                         $wgOut->addWikiMsg( 'titleprotectedwarning' );
1240                 }
1241
1242                 if ( $this->kblength === false ) {
1243                         $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
1244                 }
1245                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
1246                         $wgOut->addHTML( "<div class='error' id='mw-edit-longpageerror'>\n" );
1247                         $wgOut->addWikiMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) );
1248                         $wgOut->addHTML( "</div>\n" );
1249                 } elseif ( $this->kblength > 29 ) {
1250                         $wgOut->addHTML( "<div id='mw-edit-longpagewarning'>\n" );
1251                         $wgOut->addWikiMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) );
1252                         $wgOut->addHTML( "</div>\n" );
1253                 }
1254
1255                 $q = 'action='.$this->action;
1256                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
1257                 $action = $wgTitle->escapeLocalURL( $q );
1258
1259                 $summary = wfMsgExt( 'summary', array( 'parseinline' ) );
1260                 $subject = wfMsgExt( 'subject', array( 'parseinline' ) );
1261
1262                 $cancel = $sk->makeKnownLinkObj( $wgTitle, wfMsgHtml( 'cancel' ) );
1263                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ) );
1264                 $edithelp = Xml::element( 'a', array( 'target' => 'helpwindow', 'href' => $edithelpurl ), wfMsg( 'edithelp' ) ) .
1265                         ' ' . wfMsgExt( 'newwindow', array( 'parseinline' ) );
1266
1267                 global $wgRightsText;
1268                 if ( $wgRightsText ) {
1269                         $copywarnMsg = array( 'copyrightwarning',
1270                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
1271                                 $wgRightsText );
1272                 } else {
1273                         $copywarnMsg = array( 'copyrightwarning2',
1274                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
1275                 }
1276
1277                 if ( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
1278                         # prepare toolbar for edit buttons
1279                         $toolbar = EditPage::getEditToolbar();
1280                 } else {
1281                         $toolbar = '';
1282                 }
1283
1284                 // activate checkboxes if user wants them to be always active
1285                 if ( !$this->preview && !$this->diff ) {
1286                         # Sort out the "watch" checkbox
1287                         if ( $wgUser->getOption( 'watchdefault' ) ) {
1288                                 # Watch all edits
1289                                 $this->watchthis = true;
1290                         } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1291                                 # Watch creations
1292                                 $this->watchthis = true;
1293                         } elseif ( $this->mTitle->userIsWatching() ) {
1294                                 # Already watched
1295                                 $this->watchthis = true;
1296                         }
1297
1298                         # May be overriden by request parameters
1299                         if( $wgRequest->getBool( 'watchthis' ) ) {
1300                                 $this->watchthis = true;
1301                         }
1302
1303                         if ( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
1304                 }
1305
1306                 $wgOut->addHTML( $this->editFormPageTop );
1307
1308                 if ( $wgUser->getOption( 'previewontop' ) ) {
1309                         $this->displayPreviewArea( $previewOutput, true );
1310                 }
1311
1312
1313                 $wgOut->addHTML( $this->editFormTextTop );
1314
1315                 # if this is a comment, show a subject line at the top, which is also the edit summary.
1316                 # Otherwise, show a summary field at the bottom
1317                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
1318
1319                 # If a blank edit summary was previously provided, and the appropriate
1320                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1321                 # user being bounced back more than once in the event that a summary
1322                 # is not required.
1323                 #####
1324                 # For a bit more sophisticated detection of blank summaries, hash the
1325                 # automatic one and pass that in the hidden field wpAutoSummary.
1326                 $summaryhiddens =  '';
1327                 if ( $this->missingSummary ) $summaryhiddens .= Xml::hidden( 'wpIgnoreBlankSummary', true );
1328                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1329                 $summaryhiddens .= Xml::hidden( 'wpAutoSummary', $autosumm );
1330                 $subjectPreviewMsg = wfMsgExt( 'subject-preview', array( 'escapenoentities' ) );
1331                 if ( $this->section == 'new' ) {
1332                         $commentsubject = "<span id='wpSummaryLabel'><label for='wpSummary'>{$subject}</label></span>\n" .
1333                                 "<input tabindex='1' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' />" .
1334                                 "{$summaryhiddens}<br />";
1335                         $editsummary = "<div class='editOptions'>\n";
1336                         global $wgParser;
1337                         $formattedSummary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $this->summary ) );
1338                         $subjectpreview = $summarytext && $this->preview ?
1339                                 "<div class=\"mw-summary-preview\">" . $subjectPreviewMsg . $sk->commentBlock( $formattedSummary, $this->mTitle, true ) . "</div>\n" : '';
1340                         $summarypreview = '';
1341                 } else {
1342                         $commentsubject = '';
1343                         $editsummary = "<div class='editOptions'>\n<span id='wpSummaryLabel'><label for='wpSummary'>{$summary}</label></span>\n" .
1344                                 "<input tabindex='2' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' />" .
1345                                 "{$summaryhiddens}<br />";
1346                         $subjectpreview = '';
1347                         $summarypreview = $summarytext && $this->preview ?
1348                                 "<div class=\"mw-summary-preview\">" . $subjectPreviewMsg . $sk->commentBlock( $this->summary, $this->mTitle ) . "</div>\n" : '';
1349                 }
1350
1351                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
1352                 if ( !$this->preview && !$this->diff ) {
1353                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
1354                 }
1355                 $templates = $this->getTemplates();
1356                 $formattedtemplates = $sk->formatTemplates( $templates, $this->preview, $this->section != '');
1357
1358                 $hiddencats = $this->mArticle->getHiddenCategories();
1359                 $formattedhiddencats = $sk->formatHiddenCategories( $hiddencats );
1360
1361                 global $wgUseMetadataEdit ;
1362                 if ( $wgUseMetadataEdit ) {
1363                         $metadata = $this->mMetaData;
1364                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
1365                         $top = wfMsgWikiHtml( 'metadata_help' );
1366                         /* ToDo: Replace with clean code */
1367                         $ew = $wgUser->getOption( 'editwidth' );
1368                         if ( $ew ) $ew = " style=\"width:100%\"";
1369                         else $ew = '';
1370                         $cols = $wgUser->getIntOption( 'cols' );
1371                         /* /ToDo */
1372                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
1373                 }
1374                 else $metadata = "" ;
1375
1376                 $recreate = '';
1377                 if ( $this->wasDeletedSinceLastEdit() ) {
1378                         if ( 'save' != $this->formtype ) {
1379                                 $wgOut->addWikiMsg( 'deletedwhileediting' );
1380                         } else {
1381                                 // Hide the toolbar and edit area, use can click preview to get it back
1382                                 // Add an confirmation checkbox and explanation.
1383                                 $toolbar = '';
1384                                 $recreate = wfMsgExt( 'confirmrecreate',  array( 'parse' ), $this->lastDelete->user_name , $this->lastDelete->log_comment ) .
1385                                         "<br />" .
1386                                         Xml::checkLabel( wfMsg( 'recreate' ), 'wpRecreate', 'wpRecreate', false,
1387                                                 array( 'tabindex' => '1' ), array( 'title' => wfMsg( 'tooltip-recreate' ) ) );
1388                         }
1389                 }
1390
1391                 $tabindex = 2;
1392
1393                 $checkboxes = $this->getCheckboxes( $tabindex, $sk,
1394                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
1395
1396                 $checkboxhtml = implode( $checkboxes, "\n" );
1397
1398                 $buttons = $this->getEditButtons( $tabindex );
1399                 $buttonshtml = implode( $buttons, "\n" );
1400
1401                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
1402                         ? '' : Xml::hidden( 'safemode', '1' );
1403
1404                 $wgOut->addHTML( <<<END
1405 {$toolbar}
1406 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1407 END
1408 );
1409
1410                 if ( is_callable( $formCallback ) ) {
1411                         call_user_func_array( $formCallback, array( &$wgOut ) );
1412                 }
1413
1414                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1415
1416                 // Put these up at the top to ensure they aren't lost on early form submission
1417                 $this->showFormBeforeText();
1418
1419                 $wgOut->addHTML( <<<END
1420 {$recreate}
1421 {$commentsubject}
1422 {$subjectpreview}
1423 {$this->editFormTextBeforeContent}
1424 END
1425 );
1426                 $this->showTextbox1( $classes );
1427
1428                 $wgOut->wrapWikiMsg( "<div id=\"editpage-copywarn\">\n$1\n</div>", $copywarnMsg );
1429                 $wgOut->addHTML( <<<END
1430 {$this->editFormTextAfterWarn}
1431 {$metadata}
1432 {$editsummary}
1433 {$summarypreview}
1434 {$checkboxhtml}
1435 {$safemodehtml}
1436 END
1437 );
1438
1439                 $wgOut->addHTML(
1440 "<div class='editButtons'>
1441 {$buttonshtml}
1442         <span class='editHelp'>{$cancel} | {$edithelp}</span>
1443 </div><!-- editButtons -->
1444 </div><!-- editOptions -->");
1445
1446                 /**
1447                  * To make it harder for someone to slip a user a page
1448                  * which submits an edit form to the wiki without their
1449                  * knowledge, a random token is associated with the login
1450                  * session. If it's not passed back with the submission,
1451                  * we won't save the page, or render user JavaScript and
1452                  * CSS previews.
1453                  *
1454                  * For anon editors, who may not have a session, we just
1455                  * include the constant suffix to prevent editing from
1456                  * broken text-mangling proxies.
1457                  */
1458                 $token = htmlspecialchars( $wgUser->editToken() );
1459                 $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
1460
1461                 $this->showEditTools();
1462
1463                 $wgOut->addHTML( <<<END
1464 {$this->editFormTextAfterTools}
1465 <div class='templatesUsed'>
1466 {$formattedtemplates}
1467 </div>
1468 <div class='hiddencats'>
1469 {$formattedhiddencats}
1470 </div>
1471 END
1472 );
1473
1474                 if ( $this->isConflict && wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
1475                         $wgOut->wrapWikiMsg( '==$1==', 'yourdiff' );
1476
1477                         $de = new DifferenceEngine( $this->mTitle );
1478                         $de->setText( $this->textbox2, $this->textbox1 );
1479                         $de->showDiff( wfMsgExt( 'yourtext', array( 'parseinline' ) ), wfMsgExt( 'storedversion', array( 'parseinline' ) ) );
1480
1481                         $wgOut->wrapWikiMsg( '==$1==', 'yourtext' );
1482                         $this->showTextbox2();
1483                 }
1484                 $wgOut->addHTML( $this->editFormTextBottom );
1485                 $wgOut->addHTML( "</form>\n" );
1486                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1487                         $this->displayPreviewArea( $previewOutput, false );
1488                 }
1489
1490                 wfProfileOut( __METHOD__ );
1491         }
1492
1493         protected function showFormBeforeText() {
1494                 global $wgOut;
1495                 $wgOut->addHTML( "
1496 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
1497 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
1498 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
1499 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
1500         }
1501
1502         protected function showTextbox1( $classes ) {
1503                 $attribs = array( 'tabindex' => 1 );
1504
1505                 if ( $this->wasDeletedSinceLastEdit() )
1506                         $attribs['type'] = 'hidden';
1507                 if ( !empty($classes) )
1508                         $attribs['class'] = implode(' ',$classes);
1509
1510                 $this->showTextbox( $this->textbox1, 'wpTextbox1', $attribs );
1511         }
1512
1513         protected function showTextbox2() {
1514                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6 ) );
1515         }
1516
1517         protected function showTextbox( $content, $name, $attribs = array() ) {
1518                 global $wgOut, $wgUser;
1519
1520                 $wikitext = $this->safeUnicodeOutput( $content );
1521                 if ( $wikitext !== '' ) {
1522                         // Ensure there's a newline at the end, otherwise adding lines
1523                         // is awkward.
1524                         // But don't add a newline if the ext is empty, or Firefox in XHTML
1525                         // mode will show an extra newline. A bit annoying.
1526                         $wikitext .= "\n";
1527                 }
1528
1529                 $attribs['accesskey'] = ',';
1530                 $attribs['id'] = $name;
1531
1532                 if ( $wgUser->getOption( 'editwidth' ) )
1533                         $attribs['style'] = 'width: 100%';
1534
1535                 $wgOut->addHTML( Xml::textarea(
1536                         $name,
1537                         $wikitext,
1538                         $wgUser->getIntOption( 'cols' ), $wgUser->getIntOption( 'rows' ),
1539                         $attribs ) );
1540         }
1541
1542         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
1543                 global $wgOut;
1544                 $classes = array();
1545                 if ( $isOnTop )
1546                         $classes[] = 'ontop';
1547
1548                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
1549
1550                 if ( $this->formtype != 'preview' )
1551                         $attribs['style'] = 'display: none;';
1552
1553                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
1554
1555                 if ( $this->formtype == 'preview' ) {
1556                         $this->showPreview( $previewOutput );
1557                 }
1558
1559                 $wgOut->addHTML( '</div>' );
1560
1561                 if ( $this->formtype == 'diff') {
1562                         $this->showDiff();
1563                 }
1564         }
1565
1566         /**
1567          * Append preview output to $wgOut.
1568          * Includes category rendering if this is a category page.
1569          *
1570          * @param string $text The HTML to be output for the preview.
1571          */
1572         protected function showPreview( $text ) {
1573                 global $wgOut;
1574                 if ( $this->mTitle->getNamespace() == NS_CATEGORY) {
1575                         $this->mArticle->openShowCategory();
1576                 }
1577                 # This hook seems slightly odd here, but makes things more
1578                 # consistent for extensions.
1579                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
1580                 $wgOut->addHTML( $text );
1581                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
1582                         $this->mArticle->closeShowCategory();
1583                 }
1584         }
1585
1586         /**
1587          * Live Preview lets us fetch rendered preview page content and
1588          * add it to the page without refreshing the whole page.
1589          * If not supported by the browser it will fall through to the normal form
1590          * submission method.
1591          *
1592          * This function outputs a script tag to support live preview, and
1593          * returns an onclick handler which should be added to the attributes
1594          * of the preview button
1595          */
1596         function doLivePreviewScript() {
1597                 global $wgOut, $wgTitle;
1598                 $wgOut->addScriptFile( 'preview.js' );
1599                 $liveAction = $wgTitle->getLocalUrl( "action={$this->action}&wpPreview=true&live=true" );
1600                 return "return !lpDoPreview(" .
1601                         "editform.wpTextbox1.value," .
1602                         '"' . $liveAction . '"' . ")";
1603         }
1604
1605         protected function showEditTools() {
1606                 global $wgOut;
1607                 $wgOut->addHTML( '<div class="mw-editTools">' );
1608                 $wgOut->addWikiMsgArray( 'edittools', array(), array( 'content' ) );
1609                 $wgOut->addHTML( '</div>' );
1610         }
1611
1612         function getLastDelete() {
1613                 $dbr = wfGetDB( DB_SLAVE );
1614                 $data = $dbr->selectRow(
1615                         array( 'logging', 'user' ),
1616                         array( 'log_type',
1617                                'log_action',
1618                                'log_timestamp',
1619                                'log_user',
1620                                'log_namespace',
1621                                'log_title',
1622                                'log_comment',
1623                                'log_params',
1624                                'user_name', ),
1625                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1626                                'log_title' => $this->mTitle->getDBkey(),
1627                                'log_type' => 'delete',
1628                                'log_action' => 'delete',
1629                                'user_id=log_user' ),
1630                         __METHOD__,
1631                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
1632
1633                 return $data;
1634         }
1635
1636         /**
1637          * Get the rendered text for previewing.
1638          * @return string
1639          */
1640         function getPreviewText() {
1641                 global $wgOut, $wgUser, $wgTitle, $wgParser, $wgLang, $wgContLang, $wgMessageCache;
1642
1643                 wfProfileIn( __METHOD__ );
1644
1645                 if ( $this->mTriedSave && !$this->mTokenOk ) {
1646                         if ( $this->mTokenOkExceptSuffix ) {
1647                                 $note = wfMsg( 'token_suffix_mismatch' );
1648                         } else {
1649                                 $note = wfMsg( 'session_fail_preview' );
1650                         }
1651                 } else {
1652                         $note = wfMsg( 'previewnote' );
1653                 }
1654
1655                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1656                 $parserOptions->setEditSection( false );
1657
1658                 global $wgRawHtml;
1659                 if ( $wgRawHtml && !$this->mTokenOk ) {
1660                         // Could be an offsite preview attempt. This is very unsafe if
1661                         // HTML is enabled, as it could be an attack.
1662                         return $wgOut->parse( "<div class='previewnote'>" .
1663                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1664                 }
1665
1666                 # don't parse user css/js, show message about preview
1667                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1668
1669                 if ( $this->isCssJsSubpage ) {
1670                         if (preg_match("/\\.css$/", $this->mTitle->getText() ) ) {
1671                                 $previewtext = wfMsg('usercsspreview');
1672                         } else if (preg_match("/\\.js$/", $this->mTitle->getText() ) ) {
1673                                 $previewtext = wfMsg('userjspreview');
1674                         }
1675                         $parserOptions->setTidy(true);
1676                         $parserOutput = $wgParser->parse( $previewtext, $this->mTitle, $parserOptions );
1677                         $previewHTML = $parserOutput->mText;
1678                 } elseif ( $rt = Title::newFromRedirect( $this->textbox1 ) ) {
1679                         $previewHTML = $this->mArticle->viewRedirect( $rt, false );
1680                 } else {
1681                         $toparse = $this->textbox1;
1682
1683                         # If we're adding a comment, we need to show the
1684                         # summary as the headline
1685                         if ( $this->section=="new" && $this->summary!="" ) {
1686                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1687                         }
1688
1689                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData;
1690
1691                         // Parse mediawiki messages with correct target language
1692                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1693                                 list( /* $unused */, $lang ) = $wgMessageCache->figureMessage( $this->mTitle->getText() );
1694                                 $obj = wfGetLangObj( $lang );
1695                                 $parserOptions->setTargetLanguage( $obj );
1696                         }
1697
1698
1699                         $parserOptions->setTidy(true);
1700                         $parserOptions->enableLimitReport();
1701                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ),
1702                                         $this->mTitle, $parserOptions );
1703
1704                         $previewHTML = $parserOutput->getText();
1705                         $this->mParserOutput = $parserOutput;
1706                         $wgOut->addParserOutputNoText( $parserOutput );
1707
1708                         if ( count( $parserOutput->getWarnings() ) ) {
1709                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
1710                         }
1711                 }
1712
1713                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
1714                         "<div class='previewnote'>" . $wgOut->parse( $note ) . "</div>\n";
1715                 if ( $this->isConflict ) {
1716                         $previewhead .='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1717                 }
1718
1719                 wfProfileOut( __METHOD__ );
1720                 return $previewhead . $previewHTML;
1721         }
1722
1723         function getTemplates() {
1724                 if ( $this->preview || $this->section != '' ) {
1725                         $templates = array();
1726                         if ( !isset($this->mParserOutput) ) return $templates;
1727                         foreach( $this->mParserOutput->getTemplates() as $ns => $template) {
1728                                 foreach( array_keys( $template ) as $dbk ) {
1729                                         $templates[] = Title::makeTitle($ns, $dbk);
1730                                 }
1731                         }
1732                         return $templates;
1733                 } else {
1734                         return $this->mArticle->getUsedTemplates();
1735                 }
1736         }
1737
1738         /**
1739          * Call the stock "user is blocked" page
1740          */
1741         function blockedPage() {
1742                 global $wgOut, $wgUser;
1743                 $wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
1744
1745                 # If the user made changes, preserve them when showing the markup
1746                 # (This happens when a user is blocked during edit, for instance)
1747                 $first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
1748                 if ( $first ) {
1749                         $source = $this->mTitle->exists() ? $this->getContent() : false;
1750                 } else {
1751                         $source = $this->textbox1;
1752                 }
1753
1754                 # Spit out the source or the user's modified version
1755                 if ( $source !== false ) {
1756                         $rows = $wgUser->getIntOption( 'rows' );
1757                         $cols = $wgUser->getIntOption( 'cols' );
1758                         $attribs = array( 'id' => 'wpTextbox1', 'name' => 'wpTextbox1', 'cols' => $cols, 'rows' => $rows, 'readonly' => 'readonly' );
1759                         $wgOut->addHTML( '<hr />' );
1760                         $wgOut->addWikiMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() );
1761                         # Why we don't use Xml::element here?
1762                         # Is it because if $source is '', it returns <textarea />?
1763                         $wgOut->addHTML( Xml::openElement( 'textarea', $attribs ) . htmlspecialchars( $source ) . Xml::closeElement( 'textarea' ) );
1764                 }
1765         }
1766
1767         /**
1768          * Produce the stock "please login to edit pages" page
1769          */
1770         function userNotLoggedInPage() {
1771                 global $wgUser, $wgOut, $wgTitle;
1772                 $skin = $wgUser->getSkin();
1773
1774                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1775                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $wgTitle->getPrefixedUrl() );
1776
1777                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1778                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1779                 $wgOut->setArticleRelated( false );
1780
1781                 $wgOut->addHTML( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
1782                 $wgOut->returnToMain( false, $wgTitle );
1783         }
1784
1785         /**
1786          * Creates a basic error page which informs the user that
1787          * they have attempted to edit a nonexistant section.
1788          */
1789         function noSuchSectionPage() {
1790                 global $wgOut, $wgTitle;
1791
1792                 $wgOut->setPageTitle( wfMsg( 'nosuchsectiontitle' ) );
1793                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1794                 $wgOut->setArticleRelated( false );
1795
1796                 $wgOut->addWikiMsg( 'nosuchsectiontext', $this->section );
1797                 $wgOut->returnToMain( false, $wgTitle );
1798         }
1799
1800         /**
1801          * Produce the stock "your edit contains spam" page
1802          *
1803          * @param $match Text which triggered one or more filters
1804          */
1805         function spamPage( $match = false ) {
1806                 global $wgOut, $wgTitle;
1807
1808                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1809                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1810                 $wgOut->setArticleRelated( false );
1811
1812                 $wgOut->addHTML( '<div id="spamprotected">' );
1813                 $wgOut->addWikiMsg( 'spamprotectiontext' );
1814                 if ( $match )
1815                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
1816                 $wgOut->addHTML( '</div>' );
1817
1818                 $wgOut->returnToMain( false, $wgTitle );
1819         }
1820
1821         /**
1822          * @private
1823          * @todo document
1824          */
1825         function mergeChangesInto( &$editText ){
1826                 wfProfileIn( __METHOD__ );
1827
1828                 $db = wfGetDB( DB_MASTER );
1829
1830                 // This is the revision the editor started from
1831                 $baseRevision = $this->getBaseRevision();
1832                 if ( is_null( $baseRevision ) ) {
1833                         wfProfileOut( __METHOD__ );
1834                         return false;
1835                 }
1836                 $baseText = $baseRevision->getText();
1837
1838                 // The current state, we want to merge updates into it
1839                 $currentRevision =  Revision::loadFromTitle(
1840                         $db, $this->mTitle );
1841                 if ( is_null( $currentRevision ) ) {
1842                         wfProfileOut( __METHOD__ );
1843                         return false;
1844                 }
1845                 $currentText = $currentRevision->getText();
1846
1847                 $result = '';
1848                 if ( wfMerge( $baseText, $editText, $currentText, $result ) ) {
1849                         $editText = $result;
1850                         wfProfileOut( __METHOD__ );
1851                         return true;
1852                 } else {
1853                         wfProfileOut( __METHOD__ );
1854                         return false;
1855                 }
1856         }
1857
1858         /**
1859          * Check if the browser is on a blacklist of user-agents known to
1860          * mangle UTF-8 data on form submission. Returns true if Unicode
1861          * should make it through, false if it's known to be a problem.
1862          * @return bool
1863          * @private
1864          */
1865         function checkUnicodeCompliantBrowser() {
1866                 global $wgBrowserBlackList;
1867                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
1868                         // No User-Agent header sent? Trust it by default...
1869                         return true;
1870                 }
1871                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1872                 foreach ( $wgBrowserBlackList as $browser ) {
1873                         if ( preg_match($browser, $currentbrowser) ) {
1874                                 return false;
1875                         }
1876                 }
1877                 return true;
1878         }
1879
1880         /**
1881          * @deprecated use $wgParser->stripSectionName()
1882          */
1883         function pseudoParseSectionAnchor( $text ) {
1884                 global $wgParser;
1885                 return $wgParser->stripSectionName( $text );
1886         }
1887
1888         /**
1889          * Format an anchor fragment as it would appear for a given section name
1890          * @param string $text
1891          * @return string
1892          * @private
1893          */
1894         function sectionAnchor( $text ) {
1895                 global $wgParser;
1896                 return $wgParser->guessSectionNameFromWikiText( $text );
1897         }
1898
1899         /**
1900          * Shows a bulletin board style toolbar for common editing functions.
1901          * It can be disabled in the user preferences.
1902          * The necessary JavaScript code can be found in skins/common/edit.js.
1903          *
1904          * @return string
1905          */
1906         static function getEditToolbar() {
1907                 global $wgStylePath, $wgContLang, $wgLang, $wgJsMimeType;
1908
1909                 /**
1910                  * toolarray an array of arrays which each include the filename of
1911                  * the button image (without path), the opening tag, the closing tag,
1912                  * and optionally a sample text that is inserted between the two when no
1913                  * selection is highlighted.
1914                  * The tip text is shown when the user moves the mouse over the button.
1915                  *
1916                  * Already here are accesskeys (key), which are not used yet until someone
1917                  * can figure out a way to make them work in IE. However, we should make
1918                  * sure these keys are not defined on the edit page.
1919                  */
1920                 $toolarray = array(
1921                         array(
1922                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
1923                                 'id'     => 'mw-editbutton-bold',
1924                                 'open'   => '\'\'\'',
1925                                 'close'  => '\'\'\'',
1926                                 'sample' => wfMsg( 'bold_sample' ),
1927                                 'tip'    => wfMsg( 'bold_tip' ),
1928                                 'key'    => 'B'
1929                         ),
1930                         array(
1931                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
1932                                 'id'     => 'mw-editbutton-italic',
1933                                 'open'   => '\'\'',
1934                                 'close'  => '\'\'',
1935                                 'sample' => wfMsg( 'italic_sample' ),
1936                                 'tip'    => wfMsg( 'italic_tip' ),
1937                                 'key'    => 'I'
1938                         ),
1939                         array(
1940                                 'image'  => $wgLang->getImageFile( 'button-link' ),
1941                                 'id'     => 'mw-editbutton-link',
1942                                 'open'   => '[[',
1943                                 'close'  => ']]',
1944                                 'sample' => wfMsg( 'link_sample' ),
1945                                 'tip'    => wfMsg( 'link_tip' ),
1946                                 'key'    => 'L'
1947                         ),
1948                         array(
1949                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
1950                                 'id'     => 'mw-editbutton-extlink',
1951                                 'open'   => '[',
1952                                 'close'  => ']',
1953                                 'sample' => wfMsg( 'extlink_sample' ),
1954                                 'tip'    => wfMsg( 'extlink_tip' ),
1955                                 'key'    => 'X'
1956                         ),
1957                         array(
1958                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
1959                                 'id'     => 'mw-editbutton-headline',
1960                                 'open'   => "\n== ",
1961                                 'close'  => " ==\n",
1962                                 'sample' => wfMsg( 'headline_sample' ),
1963                                 'tip'    => wfMsg( 'headline_tip' ),
1964                                 'key'    => 'H'
1965                         ),
1966                         array(
1967                                 'image'  => $wgLang->getImageFile( 'button-image' ),
1968                                 'id'     => 'mw-editbutton-image',
1969                                 'open'   => '[['.$wgContLang->getNsText( NS_FILE ).':',
1970                                 'close'  => ']]',
1971                                 'sample' => wfMsg( 'image_sample' ),
1972                                 'tip'    => wfMsg( 'image_tip' ),
1973                                 'key'    => 'D'
1974                         ),
1975                         array(
1976                                 'image'  => $wgLang->getImageFile( 'button-media' ),
1977                                 'id'     => 'mw-editbutton-media',
1978                                 'open'   => '[['.$wgContLang->getNsText( NS_MEDIA ).':',
1979                                 'close'  => ']]',
1980                                 'sample' => wfMsg( 'media_sample' ),
1981                                 'tip'    => wfMsg( 'media_tip' ),
1982                                 'key'    => 'M'
1983                         ),
1984                         array(
1985                                 'image'  => $wgLang->getImageFile( 'button-math' ),
1986                                 'id'     => 'mw-editbutton-math',
1987                                 'open'   => "<math>",
1988                                 'close'  => "</math>",
1989                                 'sample' => wfMsg( 'math_sample' ),
1990                                 'tip'    => wfMsg( 'math_tip' ),
1991                                 'key'    => 'C'
1992                         ),
1993                         array(
1994                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
1995                                 'id'     => 'mw-editbutton-nowiki',
1996                                 'open'   => "<nowiki>",
1997                                 'close'  => "</nowiki>",
1998                                 'sample' => wfMsg( 'nowiki_sample' ),
1999                                 'tip'    => wfMsg( 'nowiki_tip' ),
2000                                 'key'    => 'N'
2001                         ),
2002                         array(
2003                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
2004                                 'id'     => 'mw-editbutton-signature',
2005                                 'open'   => '--~~~~',
2006                                 'close'  => '',
2007                                 'sample' => '',
2008                                 'tip'    => wfMsg( 'sig_tip' ),
2009                                 'key'    => 'Y'
2010                         ),
2011                         array(
2012                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
2013                                 'id'     => 'mw-editbutton-hr',
2014                                 'open'   => "\n----\n",
2015                                 'close'  => '',
2016                                 'sample' => '',
2017                                 'tip'    => wfMsg( 'hr_tip' ),
2018                                 'key'    => 'R'
2019                         )
2020                 );
2021                 $toolbar = "<div id='toolbar'>\n";
2022                 $toolbar.="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
2023
2024                 foreach( $toolarray as $tool ) {
2025                         $params = array(
2026                                 $image = $wgStylePath.'/common/images/'.$tool['image'],
2027                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
2028                                 // Older browsers show a "speedtip" type message only for ALT.
2029                                 // Ideally these should be different, realistically they
2030                                 // probably don't need to be.
2031                                 $tip = $tool['tip'],
2032                                 $open = $tool['open'],
2033                                 $close = $tool['close'],
2034                                 $sample = $tool['sample'],
2035                                 $cssId = $tool['id'],
2036                         );
2037
2038                         $paramList = implode( ',',
2039                                 array_map( array( 'Xml', 'encodeJsVar' ), $params ) );
2040                         $toolbar.="addButton($paramList);\n";
2041                 }
2042
2043                 $toolbar.="/*]]>*/\n</script>";
2044                 $toolbar.="\n</div>";
2045                 return $toolbar;
2046         }
2047
2048         /**
2049          * Returns an array of html code of the following checkboxes:
2050          * minor and watch
2051          *
2052          * @param $tabindex Current tabindex
2053          * @param $skin Skin object
2054          * @param $checked Array of checkbox => bool, where bool indicates the checked
2055          *                 status of the checkbox
2056          *
2057          * @return array
2058          */
2059         public function getCheckboxes( &$tabindex, $skin, $checked ) {
2060                 global $wgUser;
2061
2062                 $checkboxes = array();
2063
2064                 $checkboxes['minor'] = '';
2065                 $minorLabel = wfMsgExt( 'minoredit', array( 'parseinline' ) );
2066                 if ( $wgUser->isAllowed( 'minoredit' ) ) {
2067                         $attribs = array(
2068                                 'tabindex'  => ++$tabindex,
2069                                 'accesskey' => wfMsg( 'accesskey-minoredit' ),
2070                                 'id'        => 'wpMinoredit',
2071                         );
2072                         $checkboxes['minor'] =
2073                                 Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
2074                                 "&nbsp;<label for='wpMinoredit'" . $skin->tooltip( 'minoredit', 'withaccess' ) . ">{$minorLabel}</label>";
2075                 }
2076
2077                 $watchLabel = wfMsgExt( 'watchthis', array( 'parseinline' ) );
2078                 $checkboxes['watch'] = '';
2079                 if ( $wgUser->isLoggedIn() ) {
2080                         $attribs = array(
2081                                 'tabindex'  => ++$tabindex,
2082                                 'accesskey' => wfMsg( 'accesskey-watch' ),
2083                                 'id'        => 'wpWatchthis',
2084                         );
2085                         $checkboxes['watch'] =
2086                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
2087                                 "&nbsp;<label for='wpWatchthis'" . $skin->tooltip('watch', 'withaccess') . ">{$watchLabel}</label>";
2088                 }
2089                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
2090                 return $checkboxes;
2091         }
2092
2093         /**
2094          * Returns an array of html code of the following buttons:
2095          * save, diff, preview and live
2096          *
2097          * @param $tabindex Current tabindex
2098          *
2099          * @return array
2100          */
2101         public function getEditButtons( &$tabindex ) {
2102                 global $wgLivePreview, $wgUser;
2103
2104                 $buttons = array();
2105
2106                 $temp = array(
2107                         'id'        => 'wpSave',
2108                         'name'      => 'wpSave',
2109                         'type'      => 'submit',
2110                         'tabindex'  => ++$tabindex,
2111                         'value'     => wfMsg( 'savearticle' ),
2112                         'accesskey' => wfMsg( 'accesskey-save' ),
2113                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
2114                 );
2115                 $buttons['save'] = Xml::element( 'input', $temp, '' );
2116
2117                 ++$tabindex; // use the same for preview and live preview
2118                 if ( $wgLivePreview && $wgUser->getOption( 'uselivepreview' ) ) {
2119                         $temp = array(
2120                                 'id'        => 'wpPreview',
2121                                 'name'      => 'wpPreview',
2122                                 'type'      => 'submit',
2123                                 'tabindex'  => $tabindex,
2124                                 'value'     => wfMsg( 'showpreview' ),
2125                                 'accesskey' => '',
2126                                 'title'     => wfMsg( 'tooltip-preview' ).' ['.wfMsg( 'accesskey-preview' ).']',
2127                                 'style'     => 'display: none;',
2128                         );
2129                         $buttons['preview'] = Xml::element( 'input', $temp, '' );
2130
2131                         $temp = array(
2132                                 'id'        => 'wpLivePreview',
2133                                 'name'      => 'wpLivePreview',
2134                                 'type'      => 'submit',
2135                                 'tabindex'  => $tabindex,
2136                                 'value'     => wfMsg('showlivepreview'),
2137                                 'accesskey' => wfMsg('accesskey-preview'),
2138                                 'title'     => '',
2139                                 'onclick'   => $this->doLivePreviewScript(),
2140                         );
2141                         $buttons['live'] = Xml::element( 'input', $temp, '' );
2142                 } else {
2143                         $temp = array(
2144                                 'id'        => 'wpPreview',
2145                                 'name'      => 'wpPreview',
2146                                 'type'      => 'submit',
2147                                 'tabindex'  => $tabindex,
2148                                 'value'     => wfMsg( 'showpreview' ),
2149                                 'accesskey' => wfMsg( 'accesskey-preview' ),
2150                                 'title'     => wfMsg( 'tooltip-preview' ).' ['.wfMsg( 'accesskey-preview' ).']',
2151                         );
2152                         $buttons['preview'] = Xml::element( 'input', $temp, '' );
2153                         $buttons['live'] = '';
2154                 }
2155
2156                 $temp = array(
2157                         'id'        => 'wpDiff',
2158                         'name'      => 'wpDiff',
2159                         'type'      => 'submit',
2160                         'tabindex'  => ++$tabindex,
2161                         'value'     => wfMsg( 'showdiff' ),
2162                         'accesskey' => wfMsg( 'accesskey-diff' ),
2163                         'title'     => wfMsg( 'tooltip-diff' ).' ['.wfMsg( 'accesskey-diff' ).']',
2164                 );
2165                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
2166
2167                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
2168                 return $buttons;
2169         }
2170
2171         /**
2172          * Output preview text only. This can be sucked into the edit page
2173          * via JavaScript, and saves the server time rendering the skin as
2174          * well as theoretically being more robust on the client (doesn't
2175          * disturb the edit box's undo history, won't eat your text on
2176          * failure, etc).
2177          *
2178          * @todo This doesn't include category or interlanguage links.
2179          *       Would need to enhance it a bit, <s>maybe wrap them in XML
2180          *       or something...</s> that might also require more skin
2181          *       initialization, so check whether that's a problem.
2182          */
2183         function livePreview() {
2184                 global $wgOut;
2185                 $wgOut->disable();
2186                 header( 'Content-type: text/xml; charset=utf-8' );
2187                 header( 'Cache-control: no-cache' );
2188
2189                 $previewText = $this->getPreviewText();
2190                 #$categories = $skin->getCategoryLinks();
2191
2192                 $s =
2193                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
2194                 Xml::tags( 'livepreview', null,
2195                         Xml::element( 'preview', null, $previewText )
2196                         #.      Xml::element( 'category', null, $categories )
2197                 );
2198                 echo $s;
2199         }
2200
2201
2202         /**
2203          * Get a diff between the current contents of the edit box and the
2204          * version of the page we're editing from.
2205          *
2206          * If this is a section edit, we'll replace the section as for final
2207          * save and then make a comparison.
2208          */
2209         function showDiff() {
2210                 $oldtext = $this->mArticle->fetchContent();
2211                 $newtext = $this->mArticle->replaceSection(
2212                         $this->section, $this->textbox1, $this->summary, $this->edittime );
2213                 $newtext = $this->mArticle->preSaveTransform( $newtext );
2214                 $oldtitle = wfMsgExt( 'currentrev', array( 'parseinline' ) );
2215                 $newtitle = wfMsgExt( 'yourtext', array( 'parseinline' ) );
2216                 if ( $oldtext !== false  || $newtext != '' ) {
2217                         $de = new DifferenceEngine( $this->mTitle );
2218                         $de->setText( $oldtext, $newtext );
2219                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2220                         $de->showDiffStyle();
2221                 } else {
2222                         $difftext = '';
2223                 }
2224
2225                 global $wgOut;
2226                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2227         }
2228
2229         /**
2230          * Filter an input field through a Unicode de-armoring process if it
2231          * came from an old browser with known broken Unicode editing issues.
2232          *
2233          * @param WebRequest $request
2234          * @param string $field
2235          * @return string
2236          * @private
2237          */
2238         function safeUnicodeInput( $request, $field ) {
2239                 $text = rtrim( $request->getText( $field ) );
2240                 return $request->getBool( 'safemode' )
2241                         ? $this->unmakesafe( $text )
2242                         : $text;
2243         }
2244
2245         /**
2246          * Filter an output field through a Unicode armoring process if it is
2247          * going to an old browser with known broken Unicode editing issues.
2248          *
2249          * @param string $text
2250          * @return string
2251          * @private
2252          */
2253         function safeUnicodeOutput( $text ) {
2254                 global $wgContLang;
2255                 $codedText = $wgContLang->recodeForEdit( $text );
2256                 return $this->checkUnicodeCompliantBrowser()
2257                         ? $codedText
2258                         : $this->makesafe( $codedText );
2259         }
2260
2261         /**
2262          * A number of web browsers are known to corrupt non-ASCII characters
2263          * in a UTF-8 text editing environment. To protect against this,
2264          * detected browsers will be served an armored version of the text,
2265          * with non-ASCII chars converted to numeric HTML character references.
2266          *
2267          * Preexisting such character references will have a 0 added to them
2268          * to ensure that round-trips do not alter the original data.
2269          *
2270          * @param string $invalue
2271          * @return string
2272          * @private
2273          */
2274         function makesafe( $invalue ) {
2275                 // Armor existing references for reversability.
2276                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
2277
2278                 $bytesleft = 0;
2279                 $result = "";
2280                 $working = 0;
2281                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2282                         $bytevalue = ord( $invalue{$i} );
2283                         if ( $bytevalue <= 0x7F ) { //0xxx xxxx
2284                                 $result .= chr( $bytevalue );
2285                                 $bytesleft = 0;
2286                         } elseif ( $bytevalue <= 0xBF ) { //10xx xxxx
2287                                 $working = $working << 6;
2288                                 $working += ($bytevalue & 0x3F);
2289                                 $bytesleft--;
2290                                 if ( $bytesleft <= 0 ) {
2291                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
2292                                 }
2293                         } elseif ( $bytevalue <= 0xDF ) { //110x xxxx
2294                                 $working = $bytevalue & 0x1F;
2295                                 $bytesleft = 1;
2296                         } elseif ( $bytevalue <= 0xEF ) { //1110 xxxx
2297                                 $working = $bytevalue & 0x0F;
2298                                 $bytesleft = 2;
2299                         } else { //1111 0xxx
2300                                 $working = $bytevalue & 0x07;
2301                                 $bytesleft = 3;
2302                         }
2303                 }
2304                 return $result;
2305         }
2306
2307         /**
2308          * Reverse the previously applied transliteration of non-ASCII characters
2309          * back to UTF-8. Used to protect data from corruption by broken web browsers
2310          * as listed in $wgBrowserBlackList.
2311          *
2312          * @param string $invalue
2313          * @return string
2314          * @private
2315          */
2316         function unmakesafe( $invalue ) {
2317                 $result = "";
2318                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2319                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
2320                                 $i += 3;
2321                                 $hexstring = "";
2322                                 do {
2323                                         $hexstring .= $invalue{$i};
2324                                         $i++;
2325                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
2326
2327                                 // Do some sanity checks. These aren't needed for reversability,
2328                                 // but should help keep the breakage down if the editor
2329                                 // breaks one of the entities whilst editing.
2330                                 if ( (substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6) ) {
2331                                         $codepoint = hexdec($hexstring);
2332                                         $result .= codepointToUtf8( $codepoint );
2333                                 } else {
2334                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
2335                                 }
2336                         } else {
2337                                 $result .= substr( $invalue, $i, 1 );
2338                         }
2339                 }
2340                 // reverse the transform that we made for reversability reasons.
2341                 return strtr( $result, array( "&#x0" => "&#x" ) );
2342         }
2343
2344         function noCreatePermission() {
2345                 global $wgOut;
2346                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
2347                 $wgOut->addWikiMsg( 'nocreatetext' );
2348         }
2349
2350         /**
2351          * If there are rows in the deletion log for this page, show them,
2352          * along with a nice little note for the user
2353          *
2354          * @param OutputPage $out
2355          */
2356         protected function showDeletionLog( $out ) {
2357                 global $wgUser;
2358                 $loglist = new LogEventsList( $wgUser->getSkin(), $out );
2359                 $pager = new LogPager( $loglist, 'delete', false, $this->mTitle->getPrefixedText() );
2360                 $count = $pager->getNumRows();
2361                 if ( $count > 0 ) {
2362                         $pager->mLimit = 10;
2363                         $out->addHTML( '<div class="mw-warning-with-logexcerpt">' );
2364                         $out->addWikiMsg( 'recreate-deleted-warn' );
2365                         $out->addHTML(
2366                                 $loglist->beginLogEventsList() .
2367                                 $pager->getBody() .
2368                                 $loglist->endLogEventsList()
2369                         );
2370                         if($count > 10){
2371                                 $out->addHTML( $wgUser->getSkin()->link(
2372                                         SpecialPage::getTitleFor( 'Log' ),
2373                                         wfMsgHtml( 'deletelog-fulllog' ),
2374                                         array(),
2375                                         array(
2376                                                 'type' => 'delete',
2377                                                 'page' => $this->mTitle->getPrefixedText() ) ) );
2378                         }
2379                         $out->addHTML( '</div>' );
2380                         return true;
2381                 }
2382
2383                 return false;
2384         }
2385
2386         /**
2387          * Attempt submission
2388          * @return bool false if output is done, true if the rest of the form should be displayed
2389          */
2390         function attemptSave() {
2391                 global $wgUser, $wgOut, $wgTitle, $wgRequest;
2392
2393                 $resultDetails = false;
2394                 $value = $this->internalAttemptSave( $resultDetails, $wgUser->isAllowed('bot') && $wgRequest->getBool('bot', true) );
2395
2396                 if ( $value == self::AS_SUCCESS_UPDATE || $value == self::AS_SUCCESS_NEW_ARTICLE ) {
2397                         $this->didSave = true;
2398                 }
2399
2400                 switch ($value) {
2401                         case self::AS_HOOK_ERROR_EXPECTED:
2402                         case self::AS_CONTENT_TOO_BIG:
2403                         case self::AS_ARTICLE_WAS_DELETED:
2404                         case self::AS_CONFLICT_DETECTED:
2405                         case self::AS_SUMMARY_NEEDED:
2406                         case self::AS_TEXTBOX_EMPTY:
2407                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
2408                         case self::AS_END:
2409                                 return true;
2410
2411                         case self::AS_HOOK_ERROR:
2412                         case self::AS_FILTERING:
2413                         case self::AS_SUCCESS_NEW_ARTICLE:
2414                         case self::AS_SUCCESS_UPDATE:
2415                                 return false;
2416
2417                         case self::AS_SPAM_ERROR:
2418                                 $this->spamPage ( $resultDetails['spam'] );
2419                                 return false;
2420
2421                         case self::AS_BLOCKED_PAGE_FOR_USER:
2422                                 $this->blockedPage();
2423                                 return false;
2424
2425                         case self::AS_IMAGE_REDIRECT_ANON:
2426                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
2427                                 return false;
2428
2429                         case self::AS_READ_ONLY_PAGE_ANON:
2430                                 $this->userNotLoggedInPage();
2431                                 return false;
2432
2433                         case self::AS_READ_ONLY_PAGE_LOGGED:
2434                         case self::AS_READ_ONLY_PAGE:
2435                                 $wgOut->readOnlyPage();
2436                                 return false;
2437
2438                         case self::AS_RATE_LIMITED:
2439                                 $wgOut->rateLimited();
2440                                 return false;
2441
2442                         case self::AS_NO_CREATE_PERMISSION;
2443                                 $this->noCreatePermission();
2444                                 return;
2445
2446                         case self::AS_BLANK_ARTICLE:
2447                                 $wgOut->redirect( $wgTitle->getFullURL() );
2448                                 return false;
2449
2450                         case self::AS_IMAGE_REDIRECT_LOGGED:
2451                                 $wgOut->permissionRequired( 'upload' );
2452                                 return false;
2453                 }
2454         }
2455
2456         function getBaseRevision() {
2457                 if ( $this->mBaseRevision == false ) {
2458                         $db = wfGetDB( DB_MASTER );
2459                         $baseRevision = Revision::loadFromTimestamp(
2460                                 $db, $this->mTitle, $this->edittime );
2461                         return $this->mBaseRevision = $baseRevision;
2462                 } else {
2463                         return $this->mBaseRevision;
2464                 }
2465         }
2466 }