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                 $fname = 'EditPage::importFormData';
 550                 wfProfileIn( $fname );
 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( $this->edittime ) ) {
 574                                 # If the form is incomplete, force to preview.
 575                                 wfDebug( "$fname: 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( $request ) ) {
 588                                         # Some browsers will not report any submit button
 589                                         # if the user hits enter in the comment box.
 590                                         # The unmarked state will be assumed to be a save,
 591                                         # if the form seems otherwise complete.
 592                                         wfDebug( "$fname: Passed token check.\n" );
 593                                 } else if ( $this->diff ) {
 594                                         # Failed token check, but only requested "Show Changes".
 595                                         wfDebug( "$fname: 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( "$fname: 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 = $request->getText( 'wpAutoSummary' );
 627                 } else {
 628                         # Not a posted form? Start with nothing.
 629                         wfDebug( "$fname: 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                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 648                                 $this->summary = $request->getText( 'summary' );
 649                         }
 650
 651                         if ( $request->getVal( 'minor' ) ) {
 652                                 $this->minoredit = true;
 653                         }
 654                 }
 655
 656                 $this->oldid = $request->getInt( 'oldid' );
 657
 658                 $this->live = $request->getCheck( 'live' );
 659                 $this->editintro = $request->getText( 'editintro' );
 660
 661                 wfProfileOut( $fname );
 662         }
 663
 664         /**
 665          * Make sure the form isn't faking a user's credentials.
 666          *
 667          * @param $request WebRequest
 668          * @return bool
 669          * @private
 670          */
 671         function tokenOk( &$request ) {
 672                 global $wgUser;
 673                 $token = $request->getVal( 'wpEditToken' );
 674                 $this->mTokenOk = $wgUser->matchEditToken( $token );
 675                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
 676                 return $this->mTokenOk;
 677         }
 678
 679         /**
 680          * Show all applicable editing introductions
 681          */
 682         protected function showIntro() {
 683                 global $wgOut, $wgUser;
 684                 if ( $this->suppressIntro ) {
 685                         return;
 686                 }
 687                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exists
 688                 if ( $this->mTitle->getNamespace() == NS_USER || $this->mTitle->getNamespace() == NS_USER_TALK ) {
 689                         $parts = explode( '/', $this->mTitle->getText(), 2 );
 690                         $username = $parts[0];
 691                         $id = User::idFromName( $username );
 692                         $ip = User::isIP( $username );
 693                         if ( $id == 0 && !$ip ) {
 694                                 $wgOut->wrapWikiMsg( '<div class="mw-userpage-userdoesnotexist error">$1</div>',
 695                                         array( 'userpage-userdoesnotexist', $username ) );
 696                         }
 697                 }
 698                 # Try to add a custom edit intro, or use the standard one if this is not possible.
 699                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
 700                         if ( $wgUser->isLoggedIn() ) {
 701                                 $wgOut->wrapWikiMsg( '<div class="mw-newarticletext">$1</div>', 'newarticletext' );
 702                         } else {
 703                                 $wgOut->wrapWikiMsg( '<div class="mw-newarticletextanon">$1</div>', 'newarticletextanon' );
 704                         }
 705                 }
 706                 # Give a notice if the user is editing a deleted page...
 707                 if ( !$this->mTitle->exists() ) {
 708                         $this->showDeletionLog( $wgOut );
 709                 }
 710         }
 711
 712         /**
 713          * Attempt to show a custom editing introduction, if supplied
 714          *
 715          * @return bool
 716          */
 717         protected function showCustomIntro() {
 718                 if ( $this->editintro ) {
 719                         $title = Title::newFromText( $this->editintro );
 720                         if ( $title instanceof Title && $title->exists() && $title->userCanRead() ) {
 721                                 global $wgOut;
 722                                 $revision = Revision::newFromTitle( $title );
 723                                 $wgOut->addWikiTextTitleTidy( $revision->getText(), $this->mTitle );
 724                                 return true;
 725                         } else {
 726                                 return false;
 727                         }
 728                 } else {
 729                         return false;
 730                 }
 731         }
 732
 733         /**
 734          * Attempt submission (no UI)
 735          * @return one of the constants describing the result
 736          */
 737         function internalAttemptSave( &$result, $bot = false ) {
 738                 global $wgFilterCallback, $wgUser, $wgOut, $wgParser;
 739                 global $wgMaxArticleSize;
 740
 741                 $fname = 'EditPage::attemptSave';
 742                 wfProfileIn( $fname );
 743                 wfProfileIn( "$fname-checks" );
 744
 745                 if ( !wfRunHooks( 'EditPage::attemptSave', array( &$this ) ) )
 746                 {
 747                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving" );
 748                         return self::AS_HOOK_ERROR;
 749                 }
 750
 751                 # Check image redirect
 752                 if ( $this->mTitle->getNamespace() == NS_FILE &&
 753                         Title::newFromRedirect( $this->textbox1 ) instanceof Title &&
 754                         !$wgUser->isAllowed( 'upload' ) ) {
 755                                 if ( $wgUser->isAnon() ) {
 756                                         return self::AS_IMAGE_REDIRECT_ANON;
 757                                 } else {
 758                                         return self::AS_IMAGE_REDIRECT_LOGGED;
 759                                 }
 760                 }
 761
 762                 # Reintegrate metadata
 763                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 764                 $this->mMetaData = '' ;
 765
 766                 # Check for spam
 767                 $match = self::matchSpamRegex( $this->summary );
 768                 if ( $match === false ) {
 769                         $match = self::matchSpamRegex( $this->textbox1 );
 770                 }
 771                 if ( $match !== false ) {
 772                         $result['spam'] = $match;
 773                         $ip = wfGetIP();
 774                         $pdbk = $this->mTitle->getPrefixedDBkey();
 775                         $match = str_replace( "\n", '', $match );
 776                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
 777                         wfProfileOut( "$fname-checks" );
 778                         wfProfileOut( $fname );
 779                         return self::AS_SPAM_ERROR;
 780                 }
 781                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
 782                         # Error messages or other handling should be performed by the filter function
 783                         wfProfileOut( "$fname-checks" );
 784                         wfProfileOut( $fname );
 785                         return self::AS_FILTERING;
 786                 }
 787                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
 788                         # Error messages etc. could be handled within the hook...
 789                         wfProfileOut( "$fname-checks" );
 790                         wfProfileOut( $fname );
 791                         return self::AS_HOOK_ERROR;
 792                 } elseif ( $this->hookError != '' ) {
 793                         # ...or the hook could be expecting us to produce an error
 794                         wfProfileOut( "$fname-checks" );
 795                         wfProfileOut( $fname );
 796                         return self::AS_HOOK_ERROR_EXPECTED;
 797                 }
 798                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 799                         # Check block state against master, thus 'false'.
 800                         wfProfileOut( "$fname-checks" );
 801                         wfProfileOut( $fname );
 802                         return self::AS_BLOCKED_PAGE_FOR_USER;
 803                 }
 804                 $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 805                 if ( $this->kblength > $wgMaxArticleSize ) {
 806                         // Error will be displayed by showEditForm()
 807                         $this->tooBig = true;
 808                         wfProfileOut( "$fname-checks" );
 809                         wfProfileOut( $fname );
 810                         return self::AS_CONTENT_TOO_BIG;
 811                 }
 812
 813                 if ( !$wgUser->isAllowed('edit') ) {
 814                         if ( $wgUser->isAnon() ) {
 815                                 wfProfileOut( "$fname-checks" );
 816                                 wfProfileOut( $fname );
 817                                 return self::AS_READ_ONLY_PAGE_ANON;
 818                         }
 819                         else {
 820                                 wfProfileOut( "$fname-checks" );
 821                                 wfProfileOut( $fname );
 822                                 return self::AS_READ_ONLY_PAGE_LOGGED;
 823                         }
 824                 }
 825
 826                 if ( wfReadOnly() ) {
 827                         wfProfileOut( "$fname-checks" );
 828                         wfProfileOut( $fname );
 829                         return self::AS_READ_ONLY_PAGE;
 830                 }
 831                 if ( $wgUser->pingLimiter() ) {
 832                         wfProfileOut( "$fname-checks" );
 833                         wfProfileOut( $fname );
 834                         return self::AS_RATE_LIMITED;
 835                 }
 836
 837                 # If the article has been deleted while editing, don't save it without
 838                 # confirmation
 839                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
 840                         wfProfileOut( "$fname-checks" );
 841                         wfProfileOut( $fname );
 842                         return self::AS_ARTICLE_WAS_DELETED;
 843                 }
 844
 845                 wfProfileOut( "$fname-checks" );
 846
 847                 # If article is new, insert it.
 848                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 849                 if ( 0 == $aid ) {
 850                         // Late check for create permission, just in case *PARANOIA*
 851                         if ( !$this->mTitle->userCan( 'create' ) ) {
 852                                 wfDebug( "$fname: no create permission\n" );
 853                                 wfProfileOut( $fname );
 854                                 return self::AS_NO_CREATE_PERMISSION;
 855                         }
 856
 857                         # Don't save a new article if it's blank.
 858                         if ( '' == $this->textbox1 ) {
 859                                 wfProfileOut( $fname );
 860                                 return self::AS_BLANK_ARTICLE;
 861                         }
 862
 863                         // Run post-section-merge edit filter
 864                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
 865                                 # Error messages etc. could be handled within the hook...
 866                                 wfProfileOut( $fname );
 867                                 return self::AS_HOOK_ERROR;
 868                         }
 869
 870                         $isComment = ( $this->section == 'new' );
 871
 872                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 873                                 $this->minoredit, $this->watchthis, false, $isComment, $bot);
 874
 875                         wfProfileOut( $fname );
 876                         return self::AS_SUCCESS_NEW_ARTICLE;
 877                 }
 878
 879                 # Article exists. Check for edit conflict.
 880
 881                 $this->mArticle->clear(); # Force reload of dates, etc.
 882                 $this->mArticle->forUpdate( true ); # Lock the article
 883
 884                 wfDebug("timestamp: {$this->mArticle->getTimestamp()}, edittime: {$this->edittime}\n");
 885
 886                 if ( $this->mArticle->getTimestamp() != $this->edittime ) {
 887                         $this->isConflict = true;
 888                         if ( $this->section == 'new' ) {
 889                                 if ( $this->mArticle->getUserText() == $wgUser->getName() &&
 890                                         $this->mArticle->getComment() == $this->summary ) {
 891                                         // Probably a duplicate submission of a new comment.
 892                                         // This can happen when squid resends a request after
 893                                         // a timeout but the first one actually went through.
 894                                         wfDebug( "EditPage::editForm duplicate new section submission; trigger edit conflict!\n" );
 895                                 } else {
 896                                         // New comment; suppress conflict.
 897                                         $this->isConflict = false;
 898                                         wfDebug( "EditPage::editForm conflict suppressed; new section\n" );
 899                                 }
 900                         }
 901                 }
 902                 $userid = $wgUser->getId();
 903
 904                 # Suppress edit conflict with self, except for section edits where merging is required.
 905                 if ( $this->isConflict && $this->section == '' && $this->userWasLastToEdit($userid,$this->edittime) ) {
 906                         wfDebug( "EditPage::editForm Suppressing edit conflict, same user.\n" );
 907                         $this->isConflict = false;
 908                 }
 909
 910                 if ( $this->isConflict ) {
 911                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 912                                 $this->mArticle->getTimestamp() . "')\n" );
 913                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime );
 914                 } else {
 915                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 916                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary );
 917                 }
 918                 if ( is_null( $text ) ) {
 919                         wfDebug( "EditPage::editForm activating conflict; section replace failed.\n" );
 920                         $this->isConflict = true;
 921                         $text = $this->textbox1;
 922                 }
 923
 924                 if ( $this->isConflict ) {
 925                         # Attempt merge
 926                         if ( $this->mergeChangesInto( $text ) ) {
 927                                 // Successful merge! Maybe we should tell the user the good news?
 928                                 $this->isConflict = false;
 929                                 wfDebug( "EditPage::editForm Suppressing edit conflict, successful merge.\n" );
 930                         } else {
 931                                 $this->section = '';
 932                                 $this->textbox1 = $text;
 933                                 wfDebug( "EditPage::editForm Keeping edit conflict, failed merge.\n" );
 934                         }
 935                 }
 936
 937                 if ( $this->isConflict ) {
 938                         wfProfileOut( $fname );
 939                         return self::AS_CONFLICT_DETECTED;
 940                 }
 941
 942                 $oldtext = $this->mArticle->getContent();
 943
 944                 // Run post-section-merge edit filter
 945                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$this->hookError, $this->summary ) ) ) {
 946                         # Error messages etc. could be handled within the hook...
 947                         wfProfileOut( $fname );
 948                         return self::AS_HOOK_ERROR;
 949                 }
 950
 951                 # Handle the user preference to force summaries here, but not for null edits
 952                 if ( $this->section != 'new' && !$this->allowBlankSummary && 0 != strcmp($oldtext, $text) &&
 953                         !is_object( Title::newFromRedirect( $text ) ) # check if it's not a redirect
 954                 ) {
 955                         if ( md5( $this->summary ) == $this->autoSumm ) {
 956                                 $this->missingSummary = true;
 957                                 wfProfileOut( $fname );
 958                                 return self::AS_SUMMARY_NEEDED;
 959                         }
 960                 }
 961
 962                 # And a similar thing for new sections
 963                 if ( $this->section == 'new' && !$this->allowBlankSummary ) {
 964                         if (trim($this->summary) == '') {
 965                                 $this->missingSummary = true;
 966                                 wfProfileOut( $fname );
 967                                 return self::AS_SUMMARY_NEEDED;
 968                         }
 969                 }
 970
 971                 # All's well
 972                 wfProfileIn( "$fname-sectionanchor" );
 973                 $sectionanchor = '';
 974                 if ( $this->section == 'new' ) {
 975                         if ( $this->textbox1 == '' ) {
 976                                 $this->missingComment = true;
 977                                 return self::AS_TEXTBOX_EMPTY;
 978                         }
 979                         if ( $this->summary != '' ) {
 980                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $this->summary );
 981                                 # This is a new section, so create a link to the new section
 982                                 # in the revision summary.
 983                                 $cleanSummary = $wgParser->stripSectionName( $this->summary );
 984                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
 985                         }
 986                 } elseif ( $this->section != '' ) {
 987                         # Try to get a section anchor from the section source, redirect to edited section if header found
 988                         # XXX: might be better to integrate this into Article::replaceSection
 989                         # for duplicate heading checking and maybe parsing
 990                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 991                         # we can't deal with anchors, includes, html etc in the header for now,
 992                         # headline would need to be parsed to improve this
 993                         if ( $hasmatch and strlen($matches[2]) > 0 ) {
 994                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $matches[2] );
 995                         }
 996                 }
 997                 wfProfileOut( "$fname-sectionanchor" );
 998
 999                 // Save errors may fall down to the edit form, but we've now
1000                 // merged the section into full text. Clear the section field
1001                 // so that later submission of conflict forms won't try to
1002                 // replace that into a duplicated mess.
1003                 $this->textbox1 = $text;
1004                 $this->section = '';
1005
1006                 // Check for length errors again now that the section is merged in
1007                 $this->kblength = (int)(strlen( $text ) / 1024);
1008                 if ( $this->kblength > $wgMaxArticleSize ) {
1009                         $this->tooBig = true;
1010                         wfProfileOut( $fname );
1011                         return self::AS_MAX_ARTICLE_SIZE_EXCEEDED;
1012                 }
1013
1014                 # update the article here
1015                 if ( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
1016                         $this->watchthis, $bot, $sectionanchor ) )
1017                 {
1018                         wfProfileOut( $fname );
1019                         return self::AS_SUCCESS_UPDATE;
1020                 } else {
1021                         $this->isConflict = true;
1022                 }
1023                 wfProfileOut( $fname );
1024                 return self::AS_END;
1025         }
1026
1027         /**
1028          * Check if no edits were made by other users since
1029          * the time a user started editing the page. Limit to
1030          * 50 revisions for the sake of performance.
1031          */
1032         protected function userWasLastToEdit( $id, $edittime ) {
1033                 if( !$id ) return false;
1034                 $dbw = wfGetDB( DB_MASTER );
1035                 $res = $dbw->select( 'revision',
1036                         'rev_user',
1037                         array(
1038                                 'rev_page' => $this->mArticle->getId(),
1039                                 'rev_timestamp > '.$dbw->addQuotes( $dbw->timestamp($edittime) )
1040                         ),
1041                         __METHOD__,
1042                         array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
1043                 while( $row = $res->fetchObject() ) {
1044                         if( $row->rev_user != $id ) {
1045                                 return false;
1046                         }
1047                 }
1048                 return true;
1049         }
1050
1051         /**
1052          * Check given input text against $wgSpamRegex, and return the text of the first match.
1053          * @return mixed -- matching string or false
1054          */
1055         public static function matchSpamRegex( $text ) {
1056                 global $wgSpamRegex;
1057                 if ( $wgSpamRegex ) {
1058                         // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1059                         $regexes = (array)$wgSpamRegex;
1060                         foreach( $regexes as $regex ) {
1061                                 $matches = array();
1062                                 if ( preg_match( $regex, $text, $matches ) ) {
1063                                         return $matches[0];
1064                                 }
1065                         }
1066                 }
1067                 return false;
1068         }
1069
1070         /**
1071          * Initialise form fields in the object
1072          * Called on the first invocation, e.g. when a user clicks an edit link
1073          */
1074         function initialiseForm() {
1075                 $this->edittime = $this->mArticle->getTimestamp();
1076                 $this->textbox1 = $this->getContent( false );
1077                 if ( $this->textbox1 === false ) return false;
1078                 wfProxyCheck();
1079                 return true;
1080         }
1081
1082         function setHeaders() {
1083                 global $wgOut, $wgTitle;
1084                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1085                 if ( $this->formtype == 'preview' ) {
1086                         $wgOut->setPageTitleActionText( wfMsg( 'preview' ) );
1087                 }
1088                 if ( $this->isConflict ) {
1089                         $wgOut->setPageTitle( wfMsg( 'editconflict', $wgTitle->getPrefixedText() ) );
1090                 } elseif ( $this->section != '' ) {
1091                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1092                         $wgOut->setPageTitle( wfMsg( $msg, $wgTitle->getPrefixedText() ) );
1093                 } else {
1094                         # Use the title defined by DISPLAYTITLE magic word when present
1095                         if ( isset($this->mParserOutput)
1096                          && ( $dt = $this->mParserOutput->getDisplayTitle() ) !== false ) {
1097                                 $title = $dt;
1098                         } else {
1099                                 $title = $wgTitle->getPrefixedText();
1100                         }
1101                         $wgOut->setPageTitle( wfMsg( 'editing', $title ) );
1102                 }
1103         }
1104
1105         /**
1106          * Send the edit form and related headers to $wgOut
1107          * @param $formCallback Optional callable that takes an OutputPage
1108          *                      parameter; will be called during form output
1109          *                      near the top, for captchas and the like.
1110          */
1111         function showEditForm( $formCallback=null ) {
1112                 global $wgOut, $wgUser, $wgLang, $wgContLang, $wgMaxArticleSize, $wgTitle, $wgRequest;
1113
1114                 # If $wgTitle is null, that means we're in API mode.
1115                 # Some hook probably called this function  without checking
1116                 # for is_null($wgTitle) first. Bail out right here so we don't
1117                 # do lots of work just to discard it right after.
1118                 if (is_null($wgTitle))
1119                         return;
1120
1121                 $fname = 'EditPage::showEditForm';
1122                 wfProfileIn( $fname );
1123
1124                 $sk = $wgUser->getSkin();
1125
1126                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) ) ;
1127
1128                 #need to parse the preview early so that we know which templates are used,
1129                 #otherwise users with "show preview after edit box" will get a blank list
1130                 #we parse this near the beginning so that setHeaders can do the title
1131                 #setting work instead of leaving it in getPreviewText
1132                 $previewOutput = '';
1133                 if ( $this->formtype == 'preview' ) {
1134                         $previewOutput = $this->getPreviewText();
1135                 }
1136
1137                 $this->setHeaders();
1138
1139                 # Enabled article-related sidebar, toplinks, etc.
1140                 $wgOut->setArticleRelated( true );
1141
1142                 if ( $this->isConflict ) {
1143                         $wgOut->addWikiMsg( 'explainconflict' );
1144
1145                         $this->textbox2 = $this->textbox1;
1146                         $this->textbox1 = $this->getContent();
1147                         $this->edittime = $this->mArticle->getTimestamp();
1148                 } else {
1149                         if ( $this->section != '' && $this->section != 'new' ) {
1150                                 $matches = array();
1151                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
1152                                         preg_match( "/^(=+)(.+)\\1/mi",
1153                                                 $this->textbox1,
1154                                                 $matches );
1155                                         if ( !empty( $matches[2] ) ) {
1156                                                 global $wgParser;
1157                                                 $this->summary = "/* " .
1158                                                         $wgParser->stripSectionName(trim($matches[2])) .
1159                                                         " */ ";
1160                                         }
1161                                 }
1162                         }
1163
1164                         if ( $this->missingComment ) {
1165                                 $wgOut->wrapWikiMsg( '<div id="mw-missingcommenttext">$1</div>',  'missingcommenttext' );
1166                         }
1167
1168                         if ( $this->missingSummary && $this->section != 'new' ) {
1169                                 $wgOut->wrapWikiMsg( '<div id="mw-missingsummary">$1</div>', 'missingsummary' );
1170                         }
1171
1172                         if ( $this->missingSummary && $this->section == 'new' ) {
1173                                 $wgOut->wrapWikiMsg( '<div id="mw-missingcommentheader">$1</div>', 'missingcommentheader' );
1174                         }
1175
1176                         if ( $this->hookError !== '' ) {
1177                                 $wgOut->addWikiText( $this->hookError );
1178                         }
1179
1180                         if ( !$this->checkUnicodeCompliantBrowser() ) {
1181                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
1182                         }
1183                         if ( isset( $this->mArticle ) && isset( $this->mArticle->mRevision ) ) {
1184                         // Let sysop know that this will make private content public if saved
1185
1186                                 if ( !$this->mArticle->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1187                                         $wgOut->addWikiMsg( 'rev-deleted-text-permission' );
1188                                 } else if ( $this->mArticle->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1189                                         $wgOut->addWikiMsg( 'rev-deleted-text-view' );
1190                                 }
1191
1192                                 if ( !$this->mArticle->mRevision->isCurrent() ) {
1193                                         $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
1194                                         $wgOut->addWikiMsg( 'editingold' );
1195                                 }
1196                         }
1197                 }
1198
1199                 if ( wfReadOnly() ) {
1200                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
1201                 } elseif ( $wgUser->isAnon() && $this->formtype != 'preview' ) {
1202                         $wgOut->wrapWikiMsg( '<div id="mw-anon-edit-warning">$1</div>', 'anoneditwarning' );
1203                 } else {
1204                         if ( $this->isCssJsSubpage ) {
1205                                 # Check the skin exists
1206                                 if ( $this->isValidCssJsSubpage ) {
1207                                         if ( $this->formtype !== 'preview' ) {
1208                                                 $wgOut->addWikiMsg( 'usercssjsyoucanpreview' );
1209                                         }
1210                                 } else {
1211                                         $wgOut->addWikiMsg( 'userinvalidcssjstitle', $wgTitle->getSkinFromCssJsSubpage() );
1212                                 }
1213                         }
1214                 }
1215
1216                 $classes = array(); // Textarea CSS
1217                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1218                         # Show a warning if editing an interface message
1219                         $wgOut->addWikiMsg( 'editinginterface' );
1220                 } elseif ( $this->mTitle->isProtected( 'edit' ) ) {
1221                         # Is the title semi-protected?
1222                         if ( $this->mTitle->isSemiProtected() ) {
1223                                 $noticeMsg = 'semiprotectedpagewarning';
1224                                 $classes[] = 'mw-textarea-sprotected';
1225                         } else {
1226                                 # Then it must be protected based on static groups (regular)
1227                                 $noticeMsg = 'protectedpagewarning';
1228                                 $classes[] = 'mw-textarea-protected';
1229                         }
1230                         $wgOut->addHTML( "<div class='mw-warning-with-logexcerpt'>\n" );
1231                         $wgOut->addWikiMsg( $noticeMsg );
1232                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle->getPrefixedText(), '', 1 );
1233                         $wgOut->addHTML( "</div>\n" );
1234                 }
1235                 if ( $this->mTitle->isCascadeProtected() ) {
1236                         # Is this page under cascading protection from some source pages?
1237                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
1238                         $notice = "$1\n";
1239                         if ( count($cascadeSources) > 0 ) {
1240                                 # Explain, and list the titles responsible
1241                                 foreach( $cascadeSources as $page ) {
1242                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
1243                                 }
1244                         }
1245                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', count($cascadeSources) ) );
1246                 }
1247                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
1248                         $wgOut->addWikiMsg( 'titleprotectedwarning' );
1249                 }
1250
1251                 if ( $this->kblength === false ) {
1252                         $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
1253                 }
1254                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
1255                         $wgOut->addHTML( "<div class='error' id='mw-edit-longpageerror'>\n" );
1256                         $wgOut->addWikiMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) );
1257                         $wgOut->addHTML( "</div>\n" );
1258                 } elseif ( $this->kblength > 29 ) {
1259                         $wgOut->addHTML( "<div id='mw-edit-longpagewarning'>\n" );
1260                         $wgOut->addWikiMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) );
1261                         $wgOut->addHTML( "</div>\n" );
1262                 }
1263
1264                 $q = 'action='.$this->action;
1265                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
1266                 $action = $wgTitle->escapeLocalURL( $q );
1267
1268                 $summary = wfMsg( 'summary' );
1269                 $subject = wfMsg( 'subject' );
1270
1271                 $cancel = $sk->makeKnownLink( $wgTitle->getPrefixedText(),
1272                                 wfMsgExt('cancel', array('parseinline')) );
1273                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ));
1274                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
1275                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
1276                         htmlspecialchars( wfMsg( 'newwindow' ) );
1277
1278                 global $wgRightsText;
1279                 if ( $wgRightsText ) {
1280                         $copywarnMsg = array( 'copyrightwarning',
1281                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
1282                                 $wgRightsText );
1283                 } else {
1284                         $copywarnMsg = array( 'copyrightwarning2',
1285                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
1286                 }
1287
1288                 if ( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
1289                         # prepare toolbar for edit buttons
1290                         $toolbar = EditPage::getEditToolbar();
1291                 } else {
1292                         $toolbar = '';
1293                 }
1294
1295                 // activate checkboxes if user wants them to be always active
1296                 if ( !$this->preview && !$this->diff ) {
1297                         # Sort out the "watch" checkbox
1298                         if ( $wgUser->getOption( 'watchdefault' ) ) {
1299                                 # Watch all edits
1300                                 $this->watchthis = true;
1301                         } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1302                                 # Watch creations
1303                                 $this->watchthis = true;
1304                         } elseif ( $this->mTitle->userIsWatching() ) {
1305                                 # Already watched
1306                                 $this->watchthis = true;
1307                         }
1308
1309                         # May be overriden by request parameters
1310                         if( $wgRequest->getBool( 'watchthis' ) ) {
1311                                 $this->watchthis = true;
1312                         }
1313
1314                         if ( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
1315                 }
1316
1317                 $wgOut->addHTML( $this->editFormPageTop );
1318
1319                 if ( $wgUser->getOption( 'previewontop' ) ) {
1320                         $this->displayPreviewArea( $previewOutput, true );
1321                 }
1322
1323
1324                 $wgOut->addHTML( $this->editFormTextTop );
1325
1326                 # if this is a comment, show a subject line at the top, which is also the edit summary.
1327                 # Otherwise, show a summary field at the bottom
1328                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
1329
1330                 # If a blank edit summary was previously provided, and the appropriate
1331                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1332                 # user being bounced back more than once in the event that a summary
1333                 # is not required.
1334                 #####
1335                 # For a bit more sophisticated detection of blank summaries, hash the
1336                 # automatic one and pass that in the hidden field wpAutoSummary.
1337                 $summaryhiddens =  '';
1338                 if ( $this->missingSummary ) $summaryhiddens .= Xml::hidden( 'wpIgnoreBlankSummary', true );
1339                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1340                 $summaryhiddens .= Xml::hidden( 'wpAutoSummary', $autosumm );
1341                 if ( $this->section == 'new' ) {
1342                         $commentsubject="<span id='wpSummaryLabel'><label for='wpSummary'>{$subject}</label></span>\n<input tabindex='1' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' />{$summaryhiddens}<br />";
1343                         $editsummary = "<div class='editOptions'>\n";
1344                         global $wgParser;
1345                         $formattedSummary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $this->summary ) );
1346                         $subjectpreview = $summarytext && $this->preview ? "<div class=\"mw-summary-preview\">". wfMsg('subject-preview') . $sk->commentBlock( $formattedSummary, $this->mTitle, true )."</div>\n" : '';
1347                         $summarypreview = '';
1348                 } else {
1349                         $commentsubject = '';
1350                         $editsummary="<div class='editOptions'>\n<span id='wpSummaryLabel'><label for='wpSummary'>{$summary}</label></span>\n<input tabindex='2' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' />{$summaryhiddens}<br />";
1351                         $summarypreview = $summarytext && $this->preview ? "<div class=\"mw-summary-preview\">". wfMsg('summary-preview') .$sk->commentBlock( $this->summary, $this->mTitle )."</div>\n" : '';
1352                         $subjectpreview = '';
1353                 }
1354
1355                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
1356                 if ( !$this->preview && !$this->diff ) {
1357                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
1358                 }
1359                 $templates = $this->getTemplates();
1360                 $formattedtemplates = $sk->formatTemplates( $templates, $this->preview, $this->section != '');
1361
1362                 $hiddencats = $this->mArticle->getHiddenCategories();
1363                 $formattedhiddencats = $sk->formatHiddenCategories( $hiddencats );
1364
1365                 global $wgUseMetadataEdit ;
1366                 if ( $wgUseMetadataEdit ) {
1367                         $metadata = $this->mMetaData ;
1368                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
1369                         $top = wfMsgWikiHtml( 'metadata_help' );
1370                         /* ToDo: Replace with clean code */
1371                         $ew = $wgUser->getOption( 'editwidth' );
1372                         if ( $ew ) $ew = " style=\"width:100%\"";
1373                         else $ew = '';
1374                         $cols = $wgUser->getIntOption( 'cols' );
1375                         /* /ToDo */
1376                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
1377                 }
1378                 else $metadata = "" ;
1379
1380                 $recreate = '';
1381                 if ( $this->wasDeletedSinceLastEdit() ) {
1382                         if ( 'save' != $this->formtype ) {
1383                                 $wgOut->addWikiMsg('deletedwhileediting');
1384                         } else {
1385                                 // Hide the toolbar and edit area, use can click preview to get it back
1386                                 // Add an confirmation checkbox and explanation.
1387                                 $toolbar = '';
1388                                 $recreate = $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ));
1389                                 $recreate .=
1390                                         "<br /><input tabindex='1' type='checkbox' value='1' name='wpRecreate' id='wpRecreate' />".
1391                                         "<label for='wpRecreate' title='".wfMsg('tooltip-recreate')."'>". wfMsg('recreate')."</label>";
1392                         }
1393                 }
1394
1395                 $tabindex = 2;
1396
1397                 $checkboxes = $this->getCheckboxes( $tabindex, $sk,
1398                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
1399
1400                 $checkboxhtml = implode( $checkboxes, "\n" );
1401
1402                 $buttons = $this->getEditButtons( $tabindex );
1403                 $buttonshtml = implode( $buttons, "\n" );
1404
1405                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
1406                         ? '' : Xml::hidden( 'safemode', '1' );
1407
1408                 $wgOut->addHTML( <<<END
1409 {$toolbar}
1410 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1411 END
1412 );
1413
1414                 if ( is_callable( $formCallback ) ) {
1415                         call_user_func_array( $formCallback, array( &$wgOut ) );
1416                 }
1417
1418                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1419
1420                 // Put these up at the top to ensure they aren't lost on early form submission
1421                 $this->showFormBeforeText();
1422
1423                 $wgOut->addHTML( <<<END
1424 {$recreate}
1425 {$commentsubject}
1426 {$subjectpreview}
1427 {$this->editFormTextBeforeContent}
1428 END
1429 );
1430                 $this->showTextbox1( $classes );
1431
1432                 $wgOut->wrapWikiMsg( "<div id=\"editpage-copywarn\">\n$1\n</div>", $copywarnMsg );
1433                 $wgOut->addHTML( <<<END
1434 {$this->editFormTextAfterWarn}
1435 {$metadata}
1436 {$editsummary}
1437 {$summarypreview}
1438 {$checkboxhtml}
1439 {$safemodehtml}
1440 END
1441 );
1442
1443                 $wgOut->addHTML(
1444 "<div class='editButtons'>
1445 {$buttonshtml}
1446         <span class='editHelp'>{$cancel} | {$edithelp}</span>
1447 </div><!-- editButtons -->
1448 </div><!-- editOptions -->");
1449
1450                 /**
1451                  * To make it harder for someone to slip a user a page
1452                  * which submits an edit form to the wiki without their
1453                  * knowledge, a random token is associated with the login
1454                  * session. If it's not passed back with the submission,
1455                  * we won't save the page, or render user JavaScript and
1456                  * CSS previews.
1457                  *
1458                  * For anon editors, who may not have a session, we just
1459                  * include the constant suffix to prevent editing from
1460                  * broken text-mangling proxies.
1461                  */
1462                 $token = htmlspecialchars( $wgUser->editToken() );
1463                 $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
1464
1465                 $this->showEditTools();
1466
1467                 $wgOut->addHTML( <<<END
1468 {$this->editFormTextAfterTools}
1469 <div class='templatesUsed'>
1470 {$formattedtemplates}
1471 </div>
1472 <div class='hiddencats'>
1473 {$formattedhiddencats}
1474 </div>
1475 END
1476 );
1477
1478                 if ( $this->isConflict && wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
1479                         $wgOut->wrapWikiMsg( '==$1==', "yourdiff" );
1480
1481                         $de = new DifferenceEngine( $this->mTitle );
1482                         $de->setText( $this->textbox2, $this->textbox1 );
1483                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1484
1485                         $wgOut->wrapWikiMsg( '==$1==', "yourtext" );
1486                         $this->showTextbox2();
1487                 }
1488                 $wgOut->addHTML( $this->editFormTextBottom );
1489                 $wgOut->addHTML( "</form>\n" );
1490                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1491                         $this->displayPreviewArea( $previewOutput, false );
1492                 }
1493
1494                 wfProfileOut( $fname );
1495         }
1496
1497         protected function showFormBeforeText() {
1498                 global $wgOut;
1499                 $wgOut->addHTML( "
1500 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
1501 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
1502 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
1503 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
1504         }
1505
1506         protected function showTextbox1( $classes ) {
1507                 $attribs = array( 'tabindex' => 1 );
1508
1509                 if ( $this->wasDeletedSinceLastEdit() )
1510                         $attribs['type'] = 'hidden';
1511                 if ( !empty($classes) )
1512                         $attribs['class'] = implode(' ',$classes);
1513
1514                 $this->showTextbox( $this->textbox1, 'wpTextbox1', $attribs );
1515         }
1516
1517         protected function showTextbox2() {
1518                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6 ) );
1519         }
1520
1521         protected function showTextbox( $content, $name, $attribs = array() ) {
1522                 global $wgOut, $wgUser;
1523
1524                 $wikitext = $this->safeUnicodeOutput( $content );
1525                 if ( $wikitext !== '' ) {
1526                         // Ensure there's a newline at the end, otherwise adding lines
1527                         // is awkward.
1528                         // But don't add a newline if the ext is empty, or Firefox in XHTML
1529                         // mode will show an extra newline. A bit annoying.
1530                         $wikitext .= "\n";
1531                 }
1532
1533                 $attribs['accesskey'] = ',';
1534                 $attribs['id'] = $name;
1535
1536                 if ( $wgUser->getOption( 'editwidth' ) )
1537                         $attribs['style'] = 'width: 100%';
1538
1539                 $wgOut->addHTML( Xml::textarea(
1540                         $name,
1541                         $wikitext,
1542                         $wgUser->getIntOption( 'cols' ), $wgUser->getIntOption( 'rows' ),
1543                         $attribs ) );
1544         }
1545
1546         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
1547                 global $wgOut;
1548                 $classes = array();
1549                 if ( $isOnTop )
1550                         $classes[] = 'ontop';
1551
1552                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
1553
1554                 if ( $this->formtype != 'preview' )
1555                         $attribs['style'] = 'display: none;';
1556
1557                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
1558
1559                 if ( $this->formtype == 'preview' ) {
1560                         $this->showPreview( $previewOutput );
1561                 }
1562
1563                 $wgOut->addHTML( '</div>' );
1564
1565                 if ( $this->formtype == 'diff') {
1566                         $this->showDiff();
1567                 }
1568         }
1569
1570         /**
1571          * Append preview output to $wgOut.
1572          * Includes category rendering if this is a category page.
1573          *
1574          * @param string $text The HTML to be output for the preview.
1575          */
1576         protected function showPreview( $text ) {
1577                 global $wgOut;
1578                 if ( $this->mTitle->getNamespace() == NS_CATEGORY) {
1579                         $this->mArticle->openShowCategory();
1580                 }
1581                 # This hook seems slightly odd here, but makes things more
1582                 # consistent for extensions.
1583                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
1584                 $wgOut->addHTML( $text );
1585                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
1586                         $this->mArticle->closeShowCategory();
1587                 }
1588         }
1589
1590         /**
1591          * Live Preview lets us fetch rendered preview page content and
1592          * add it to the page without refreshing the whole page.
1593          * If not supported by the browser it will fall through to the normal form
1594          * submission method.
1595          *
1596          * This function outputs a script tag to support live preview, and
1597          * returns an onclick handler which should be added to the attributes
1598          * of the preview button
1599          */
1600         function doLivePreviewScript() {
1601                 global $wgOut, $wgTitle;
1602                 $wgOut->addScriptFile( 'preview.js' );
1603                 $liveAction = $wgTitle->getLocalUrl( "action={$this->action}&wpPreview=true&live=true" );
1604                 return "return !lpDoPreview(" .
1605                         "editform.wpTextbox1.value," .
1606                         '"' . $liveAction . '"' . ")";
1607         }
1608
1609         protected function showEditTools() {
1610                 global $wgOut;
1611                 $wgOut->addHTML( '<div class="mw-editTools">' );
1612                 $wgOut->addWikiMsgArray( 'edittools', array(), array( 'content' ) );
1613                 $wgOut->addHTML( '</div>' );
1614         }
1615
1616         function getLastDelete() {
1617                 $dbr = wfGetDB( DB_SLAVE );
1618                 $data = $dbr->selectRow(
1619                         array( 'logging', 'user' ),
1620                         array( 'log_type',
1621                                'log_action',
1622                                'log_timestamp',
1623                                'log_user',
1624                                'log_namespace',
1625                                'log_title',
1626                                'log_comment',
1627                                'log_params',
1628                                'user_name', ),
1629                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1630                                'log_title' => $this->mTitle->getDBkey(),
1631                                'log_type' => 'delete',
1632                                'log_action' => 'delete',
1633                                'user_id=log_user' ),
1634                         __METHOD__,
1635                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
1636
1637                 return $data;
1638         }
1639
1640         /**
1641          * Get the rendered text for previewing.
1642          * @return string
1643          */
1644         function getPreviewText() {
1645                 global $wgOut, $wgUser, $wgTitle, $wgParser, $wgLang, $wgContLang, $wgMessageCache;
1646
1647                 wfProfileIn( __METHOD__ );
1648
1649                 if ( $this->mTriedSave && !$this->mTokenOk ) {
1650                         if ( $this->mTokenOkExceptSuffix ) {
1651                                 $note = wfMsg( 'token_suffix_mismatch' );
1652                         } else {
1653                                 $note = wfMsg( 'session_fail_preview' );
1654                         }
1655                 } else {
1656                         $note = wfMsg( 'previewnote' );
1657                 }
1658
1659                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1660                 $parserOptions->setEditSection( false );
1661
1662                 global $wgRawHtml;
1663                 if ( $wgRawHtml && !$this->mTokenOk ) {
1664                         // Could be an offsite preview attempt. This is very unsafe if
1665                         // HTML is enabled, as it could be an attack.
1666                         return $wgOut->parse( "<div class='previewnote'>" .
1667                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1668                 }
1669
1670                 # don't parse user css/js, show message about preview
1671                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1672
1673                 if ( $this->isCssJsSubpage ) {
1674                         if (preg_match("/\\.css$/", $this->mTitle->getText() ) ) {
1675                                 $previewtext = wfMsg('usercsspreview');
1676                         } else if (preg_match("/\\.js$/", $this->mTitle->getText() ) ) {
1677                                 $previewtext = wfMsg('userjspreview');
1678                         }
1679                         $parserOptions->setTidy(true);
1680                         $parserOutput = $wgParser->parse( $previewtext, $this->mTitle, $parserOptions );
1681                         $previewHTML = $parserOutput->mText;
1682                 } elseif ( $rt = Title::newFromRedirect( $this->textbox1 ) ) {
1683                         $previewHTML = $this->mArticle->viewRedirect( $rt, false );
1684                 } else {
1685                         $toparse = $this->textbox1;
1686
1687                         # If we're adding a comment, we need to show the
1688                         # summary as the headline
1689                         if ( $this->section=="new" && $this->summary!="" ) {
1690                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1691                         }
1692
1693                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData;
1694
1695                         // Parse mediawiki messages with correct target language
1696                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1697                                 list( /* $unused */, $lang ) = $wgMessageCache->figureMessage( $this->mTitle->getText() );
1698                                 $obj = wfGetLangObj( $lang );
1699                                 $parserOptions->setTargetLanguage( $obj );
1700                         }
1701
1702
1703                         $parserOptions->setTidy(true);
1704                         $parserOptions->enableLimitReport();
1705                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ),
1706                                         $this->mTitle, $parserOptions );
1707
1708                         $previewHTML = $parserOutput->getText();
1709                         $this->mParserOutput = $parserOutput;
1710                         $wgOut->addParserOutputNoText( $parserOutput );
1711
1712                         if ( count( $parserOutput->getWarnings() ) ) {
1713                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
1714                         }
1715                 }
1716
1717                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
1718                         "<div class='previewnote'>" . $wgOut->parse( $note ) . "</div>\n";
1719                 if ( $this->isConflict ) {
1720                         $previewhead .='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1721                 }
1722
1723                 wfProfileOut( __METHOD__ );
1724                 return $previewhead . $previewHTML;
1725         }
1726
1727         function getTemplates() {
1728                 if ( $this->preview || $this->section != '' ) {
1729                         $templates = array();
1730                         if ( !isset($this->mParserOutput) ) return $templates;
1731                         foreach( $this->mParserOutput->getTemplates() as $ns => $template) {
1732                                 foreach( array_keys( $template ) as $dbk ) {
1733                                         $templates[] = Title::makeTitle($ns, $dbk);
1734                                 }
1735                         }
1736                         return $templates;
1737                 } else {
1738                         return $this->mArticle->getUsedTemplates();
1739                 }
1740         }
1741
1742         /**
1743          * Call the stock "user is blocked" page
1744          */
1745         function blockedPage() {
1746                 global $wgOut, $wgUser;
1747                 $wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
1748
1749                 # If the user made changes, preserve them when showing the markup
1750                 # (This happens when a user is blocked during edit, for instance)
1751                 $first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
1752                 if ( $first ) {
1753                         $source = $this->mTitle->exists() ? $this->getContent() : false;
1754                 } else {
1755                         $source = $this->textbox1;
1756                 }
1757
1758                 # Spit out the source or the user's modified version
1759                 if ( $source !== false ) {
1760                         $rows = $wgUser->getIntOption( 'rows' );
1761                         $cols = $wgUser->getIntOption( 'cols' );
1762                         $attribs = array( 'id' => 'wpTextbox1', 'name' => 'wpTextbox1', 'cols' => $cols, 'rows' => $rows, 'readonly' => 'readonly' );
1763                         $wgOut->addHTML( '<hr />' );
1764                         $wgOut->addWikiMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() );
1765                         # Why we don't use Xml::element here?
1766                         # Is it because if $source is '', it returns <textarea />?
1767                         $wgOut->addHTML( Xml::openElement( 'textarea', $attribs ) . htmlspecialchars( $source ) . Xml::closeElement( 'textarea' ) );
1768                 }
1769         }
1770
1771         /**
1772          * Produce the stock "please login to edit pages" page
1773          */
1774         function userNotLoggedInPage() {
1775                 global $wgUser, $wgOut, $wgTitle;
1776                 $skin = $wgUser->getSkin();
1777
1778                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1779                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $wgTitle->getPrefixedUrl() );
1780
1781                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1782                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1783                 $wgOut->setArticleRelated( false );
1784
1785                 $wgOut->addHTML( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
1786                 $wgOut->returnToMain( false, $wgTitle );
1787         }
1788
1789         /**
1790          * Creates a basic error page which informs the user that
1791          * they have attempted to edit a nonexistent section.
1792          */
1793         function noSuchSectionPage() {
1794                 global $wgOut, $wgTitle;
1795
1796                 $wgOut->setPageTitle( wfMsg( 'nosuchsectiontitle' ) );
1797                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1798                 $wgOut->setArticleRelated( false );
1799
1800                 $wgOut->addWikiMsg( 'nosuchsectiontext', $this->section );
1801                 $wgOut->returnToMain( false, $wgTitle );
1802         }
1803
1804         /**
1805          * Produce the stock "your edit contains spam" page
1806          *
1807          * @param $match Text which triggered one or more filters
1808          */
1809         function spamPage( $match = false ) {
1810                 global $wgOut, $wgTitle;
1811
1812                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1813                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1814                 $wgOut->setArticleRelated( false );
1815
1816                 $wgOut->addHTML( '<div id="spamprotected">' );
1817                 $wgOut->addWikiMsg( 'spamprotectiontext' );
1818                 if ( $match )
1819                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
1820                 $wgOut->addHTML( '</div>' );
1821
1822                 $wgOut->returnToMain( false, $wgTitle );
1823         }
1824
1825         /**
1826          * @private
1827          * @todo document
1828          */
1829         function mergeChangesInto( &$editText ){
1830                 $fname = 'EditPage::mergeChangesInto';
1831                 wfProfileIn( $fname );
1832
1833                 $db = wfGetDB( DB_MASTER );
1834
1835                 // This is the revision the editor started from
1836                 $baseRevision = $this->getBaseRevision();
1837                 if ( is_null( $baseRevision ) ) {
1838                         wfProfileOut( $fname );
1839                         return false;
1840                 }
1841                 $baseText = $baseRevision->getText();
1842
1843                 // The current state, we want to merge updates into it
1844                 $currentRevision =  Revision::loadFromTitle(
1845                         $db, $this->mTitle );
1846                 if ( is_null( $currentRevision ) ) {
1847                         wfProfileOut( $fname );
1848                         return false;
1849                 }
1850                 $currentText = $currentRevision->getText();
1851
1852                 $result = '';
1853                 if ( wfMerge( $baseText, $editText, $currentText, $result ) ) {
1854                         $editText = $result;
1855                         wfProfileOut( $fname );
1856                         return true;
1857                 } else {
1858                         wfProfileOut( $fname );
1859                         return false;
1860                 }
1861         }
1862
1863         /**
1864          * Check if the browser is on a blacklist of user-agents known to
1865          * mangle UTF-8 data on form submission. Returns true if Unicode
1866          * should make it through, false if it's known to be a problem.
1867          * @return bool
1868          * @private
1869          */
1870         function checkUnicodeCompliantBrowser() {
1871                 global $wgBrowserBlackList;
1872                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
1873                         // No User-Agent header sent? Trust it by default...
1874                         return true;
1875                 }
1876                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1877                 foreach ( $wgBrowserBlackList as $browser ) {
1878                         if ( preg_match($browser, $currentbrowser) ) {
1879                                 return false;
1880                         }
1881                 }
1882                 return true;
1883         }
1884
1885         /**
1886          * @deprecated use $wgParser->stripSectionName()
1887          */
1888         function pseudoParseSectionAnchor( $text ) {
1889                 global $wgParser;
1890                 return $wgParser->stripSectionName( $text );
1891         }
1892
1893         /**
1894          * Format an anchor fragment as it would appear for a given section name
1895          * @param string $text
1896          * @return string
1897          * @private
1898          */
1899         function sectionAnchor( $text ) {
1900                 global $wgParser;
1901                 return $wgParser->guessSectionNameFromWikiText( $text );
1902         }
1903
1904         /**
1905          * Shows a bulletin board style toolbar for common editing functions.
1906          * It can be disabled in the user preferences.
1907          * The necessary JavaScript code can be found in skins/common/edit.js.
1908          *
1909          * @return string
1910          */
1911         static function getEditToolbar() {
1912                 global $wgStylePath, $wgContLang, $wgLang, $wgJsMimeType;
1913
1914                 /**
1915                  * toolarray an array of arrays which each include the filename of
1916                  * the button image (without path), the opening tag, the closing tag,
1917                  * and optionally a sample text that is inserted between the two when no
1918                  * selection is highlighted.
1919                  * The tip text is shown when the user moves the mouse over the button.
1920                  *
1921                  * Already here are accesskeys (key), which are not used yet until someone
1922                  * can figure out a way to make them work in IE. However, we should make
1923                  * sure these keys are not defined on the edit page.
1924                  */
1925                 $toolarray = array(
1926                         array(
1927                                 'image'  => $wgLang->getImageFile('button-bold'),
1928                                 'id'     => 'mw-editbutton-bold',
1929                                 'open'   => '\'\'\'',
1930                                 'close'  => '\'\'\'',
1931                                 'sample' => wfMsg('bold_sample'),
1932                                 'tip'    => wfMsg('bold_tip'),
1933                                 'key'    => 'B'
1934                         ),
1935                         array(
1936                                 'image'  => $wgLang->getImageFile('button-italic'),
1937                                 'id'     => 'mw-editbutton-italic',
1938                                 'open'   => '\'\'',
1939                                 'close'  => '\'\'',
1940                                 'sample' => wfMsg('italic_sample'),
1941                                 'tip'    => wfMsg('italic_tip'),
1942                                 'key'    => 'I'
1943                         ),
1944                         array(
1945                                 'image'  => $wgLang->getImageFile('button-link'),
1946                                 'id'     => 'mw-editbutton-link',
1947                                 'open'   => '[[',
1948                                 'close'  => ']]',
1949                                 'sample' => wfMsg('link_sample'),
1950                                 'tip'    => wfMsg('link_tip'),
1951                                 'key'    => 'L'
1952                         ),
1953                         array(
1954                                 'image'  => $wgLang->getImageFile('button-extlink'),
1955                                 'id'     => 'mw-editbutton-extlink',
1956                                 'open'   => '[',
1957                                 'close'  => ']',
1958                                 'sample' => wfMsg('extlink_sample'),
1959                                 'tip'    => wfMsg('extlink_tip'),
1960                                 'key'    => 'X'
1961                         ),
1962                         array(
1963                                 'image'  => $wgLang->getImageFile('button-headline'),
1964                                 'id'     => 'mw-editbutton-headline',
1965                                 'open'   => "\n== ",
1966                                 'close'  => " ==\n",
1967                                 'sample' => wfMsg('headline_sample'),
1968                                 'tip'    => wfMsg('headline_tip'),
1969                                 'key'    => 'H'
1970                         ),
1971                         array(
1972                                 'image'  => $wgLang->getImageFile('button-image'),
1973                                 'id'     => 'mw-editbutton-image',
1974                                 'open'   => '[['.$wgContLang->getNsText(NS_FILE).':',
1975                                 'close'  => ']]',
1976                                 'sample' => wfMsg('image_sample'),
1977                                 'tip'    => wfMsg('image_tip'),
1978                                 'key'    => 'D'
1979                         ),
1980                         array(
1981                                 'image'  => $wgLang->getImageFile('button-media'),
1982                                 'id'     => 'mw-editbutton-media',
1983                                 'open'   => '[['.$wgContLang->getNsText(NS_MEDIA).':',
1984                                 'close'  => ']]',
1985                                 'sample' => wfMsg('media_sample'),
1986                                 'tip'    => wfMsg('media_tip'),
1987                                 'key'    => 'M'
1988                         ),
1989                         array(
1990                                 'image'  => $wgLang->getImageFile('button-math'),
1991                                 'id'     => 'mw-editbutton-math',
1992                                 'open'   => "<math>",
1993                                 'close'  => "</math>",
1994                                 'sample' => wfMsg('math_sample'),
1995                                 'tip'    => wfMsg('math_tip'),
1996                                 'key'    => 'C'
1997                         ),
1998                         array(
1999                                 'image'  => $wgLang->getImageFile('button-nowiki'),
2000                                 'id'     => 'mw-editbutton-nowiki',
2001                                 'open'   => "<nowiki>",
2002                                 'close'  => "</nowiki>",
2003                                 'sample' => wfMsg('nowiki_sample'),
2004                                 'tip'    => wfMsg('nowiki_tip'),
2005                                 'key'    => 'N'
2006                         ),
2007                         array(
2008                                 'image'  => $wgLang->getImageFile('button-sig'),
2009                                 'id'     => 'mw-editbutton-signature',
2010                                 'open'   => '--~~~~',
2011                                 'close'  => '',
2012                                 'sample' => '',
2013                                 'tip'    => wfMsg('sig_tip'),
2014                                 'key'    => 'Y'
2015                         ),
2016                         array(
2017                                 'image'  => $wgLang->getImageFile('button-hr'),
2018                                 'id'     => 'mw-editbutton-hr',
2019                                 'open'   => "\n----\n",
2020                                 'close'  => '',
2021                                 'sample' => '',
2022                                 'tip'    => wfMsg('hr_tip'),
2023                                 'key'    => 'R'
2024                         )
2025                 );
2026                 $toolbar = "<div id='toolbar'>\n";
2027                 $toolbar.="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
2028
2029                 foreach($toolarray as $tool) {
2030                         $params = array(
2031                                 $image = $wgStylePath.'/common/images/'.$tool['image'],
2032                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
2033                                 // Older browsers show a "speedtip" type message only for ALT.
2034                                 // Ideally these should be different, realistically they
2035                                 // probably don't need to be.
2036                                 $tip = $tool['tip'],
2037                                 $open = $tool['open'],
2038                                 $close = $tool['close'],
2039                                 $sample = $tool['sample'],
2040                                 $cssId = $tool['id'],
2041                         );
2042
2043                         $paramList = implode( ',',
2044                                 array_map( array( 'Xml', 'encodeJsVar' ), $params ) );
2045                         $toolbar.="addButton($paramList);\n";
2046                 }
2047
2048                 $toolbar.="/*]]>*/\n</script>";
2049                 $toolbar.="\n</div>";
2050                 return $toolbar;
2051         }
2052
2053         /**
2054          * Returns an array of html code of the following checkboxes:
2055          * minor and watch
2056          *
2057          * @param $tabindex Current tabindex
2058          * @param $skin Skin object
2059          * @param $checked Array of checkbox => bool, where bool indicates the checked
2060          *                 status of the checkbox
2061          *
2062          * @return array
2063          */
2064         public function getCheckboxes( &$tabindex, $skin, $checked ) {
2065                 global $wgUser;
2066
2067                 $checkboxes = array();
2068
2069                 $checkboxes['minor'] = '';
2070                 $minorLabel = wfMsgExt('minoredit', array('parseinline'));
2071                 if ( $wgUser->isAllowed('minoredit') ) {
2072                         $attribs = array(
2073                                 'tabindex'  => ++$tabindex,
2074                                 'accesskey' => wfMsg( 'accesskey-minoredit' ),
2075                                 'id'        => 'wpMinoredit',
2076                         );
2077                         $checkboxes['minor'] =
2078                                 Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
2079                                 "&nbsp;<label for='wpMinoredit'".$skin->tooltip('minoredit', 'withaccess').">{$minorLabel}</label>";
2080                 }
2081
2082                 $watchLabel = wfMsgExt('watchthis', array('parseinline'));
2083                 $checkboxes['watch'] = '';
2084                 if ( $wgUser->isLoggedIn() ) {
2085                         $attribs = array(
2086                                 'tabindex'  => ++$tabindex,
2087                                 'accesskey' => wfMsg( 'accesskey-watch' ),
2088                                 'id'        => 'wpWatchthis',
2089                         );
2090                         $checkboxes['watch'] =
2091                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
2092                                 "&nbsp;<label for='wpWatchthis'".$skin->tooltip('watch', 'withaccess').">{$watchLabel}</label>";
2093                 }
2094                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
2095                 return $checkboxes;
2096         }
2097
2098         /**
2099          * Returns an array of html code of the following buttons:
2100          * save, diff, preview and live
2101          *
2102          * @param $tabindex Current tabindex
2103          *
2104          * @return array
2105          */
2106         public function getEditButtons(&$tabindex) {
2107                 global $wgLivePreview, $wgUser;
2108
2109                 $buttons = array();
2110
2111                 $temp = array(
2112                         'id'        => 'wpSave',
2113                         'name'      => 'wpSave',
2114                         'type'      => 'submit',
2115                         'tabindex'  => ++$tabindex,
2116                         'value'     => wfMsg('savearticle'),
2117                         'accesskey' => wfMsg('accesskey-save'),
2118                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
2119                 );
2120                 $buttons['save'] = Xml::element('input', $temp, '');
2121
2122                 ++$tabindex; // use the same for preview and live preview
2123                 if ( $wgLivePreview && $wgUser->getOption( 'uselivepreview' ) ) {
2124                         $temp = array(
2125                                 'id'        => 'wpPreview',
2126                                 'name'      => 'wpPreview',
2127                                 'type'      => 'submit',
2128                                 'tabindex'  => $tabindex,
2129                                 'value'     => wfMsg('showpreview'),
2130                                 'accesskey' => '',
2131                                 'title'     => wfMsg( 'tooltip-preview' ).' ['.wfMsg( 'accesskey-preview' ).']',
2132                                 'style'     => 'display: none;',
2133                         );
2134                         $buttons['preview'] = Xml::element('input', $temp, '');
2135
2136                         $temp = array(
2137                                 'id'        => 'wpLivePreview',
2138                                 'name'      => 'wpLivePreview',
2139                                 'type'      => 'submit',
2140                                 'tabindex'  => $tabindex,
2141                                 'value'     => wfMsg('showlivepreview'),
2142                                 'accesskey' => wfMsg('accesskey-preview'),
2143                                 'title'     => '',
2144                                 'onclick'   => $this->doLivePreviewScript(),
2145                         );
2146                         $buttons['live'] = Xml::element('input', $temp, '');
2147                 } else {
2148                         $temp = array(
2149                                 'id'        => 'wpPreview',
2150                                 'name'      => 'wpPreview',
2151                                 'type'      => 'submit',
2152                                 'tabindex'  => $tabindex,
2153                                 'value'     => wfMsg('showpreview'),
2154                                 'accesskey' => wfMsg('accesskey-preview'),
2155                                 'title'     => wfMsg( 'tooltip-preview' ).' ['.wfMsg( 'accesskey-preview' ).']',
2156                         );
2157                         $buttons['preview'] = Xml::element('input', $temp, '');
2158                         $buttons['live'] = '';
2159                 }
2160
2161                 $temp = array(
2162                         'id'        => 'wpDiff',
2163                         'name'      => 'wpDiff',
2164                         'type'      => 'submit',
2165                         'tabindex'  => ++$tabindex,
2166                         'value'     => wfMsg('showdiff'),
2167                         'accesskey' => wfMsg('accesskey-diff'),
2168                         'title'     => wfMsg( 'tooltip-diff' ).' ['.wfMsg( 'accesskey-diff' ).']',
2169                 );
2170                 $buttons['diff'] = Xml::element('input', $temp, '');
2171
2172                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
2173                 return $buttons;
2174         }
2175
2176         /**
2177          * Output preview text only. This can be sucked into the edit page
2178          * via JavaScript, and saves the server time rendering the skin as
2179          * well as theoretically being more robust on the client (doesn't
2180          * disturb the edit box's undo history, won't eat your text on
2181          * failure, etc).
2182          *
2183          * @todo This doesn't include category or interlanguage links.
2184          *       Would need to enhance it a bit, <s>maybe wrap them in XML
2185          *       or something...</s> that might also require more skin
2186          *       initialization, so check whether that's a problem.
2187          */
2188         function livePreview() {
2189                 global $wgOut;
2190                 $wgOut->disable();
2191                 header( 'Content-type: text/xml; charset=utf-8' );
2192                 header( 'Cache-control: no-cache' );
2193
2194                 $previewText = $this->getPreviewText();
2195                 #$categories = $skin->getCategoryLinks();
2196
2197                 $s =
2198                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
2199                 Xml::tags( 'livepreview', null,
2200                         Xml::element( 'preview', null, $previewText )
2201                         #.      Xml::element( 'category', null, $categories )
2202                 );
2203                 echo $s;
2204         }
2205
2206
2207         /**
2208          * Get a diff between the current contents of the edit box and the
2209          * version of the page we're editing from.
2210          *
2211          * If this is a section edit, we'll replace the section as for final
2212          * save and then make a comparison.
2213          */
2214         function showDiff() {
2215                 $oldtext = $this->mArticle->fetchContent();
2216                 $newtext = $this->mArticle->replaceSection(
2217                         $this->section, $this->textbox1, $this->summary, $this->edittime );
2218                 $newtext = $this->mArticle->preSaveTransform( $newtext );
2219                 $oldtitle = wfMsgExt( 'currentrev', array('parseinline') );
2220                 $newtitle = wfMsgExt( 'yourtext', array('parseinline') );
2221                 if ( $oldtext !== false  || $newtext != '' ) {
2222                         $de = new DifferenceEngine( $this->mTitle );
2223                         $de->setText( $oldtext, $newtext );
2224                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2225                         $de->showDiffStyle();
2226                 } else {
2227                         $difftext = '';
2228                 }
2229
2230                 global $wgOut;
2231                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2232         }
2233
2234         /**
2235          * Filter an input field through a Unicode de-armoring process if it
2236          * came from an old browser with known broken Unicode editing issues.
2237          *
2238          * @param WebRequest $request
2239          * @param string $field
2240          * @return string
2241          * @private
2242          */
2243         function safeUnicodeInput( $request, $field ) {
2244                 $text = rtrim( $request->getText( $field ) );
2245                 return $request->getBool( 'safemode' )
2246                         ? $this->unmakesafe( $text )
2247                         : $text;
2248         }
2249
2250         /**
2251          * Filter an output field through a Unicode armoring process if it is
2252          * going to an old browser with known broken Unicode editing issues.
2253          *
2254          * @param string $text
2255          * @return string
2256          * @private
2257          */
2258         function safeUnicodeOutput( $text ) {
2259                 global $wgContLang;
2260                 $codedText = $wgContLang->recodeForEdit( $text );
2261                 return $this->checkUnicodeCompliantBrowser()
2262                         ? $codedText
2263                         : $this->makesafe( $codedText );
2264         }
2265
2266         /**
2267          * A number of web browsers are known to corrupt non-ASCII characters
2268          * in a UTF-8 text editing environment. To protect against this,
2269          * detected browsers will be served an armored version of the text,
2270          * with non-ASCII chars converted to numeric HTML character references.
2271          *
2272          * Preexisting such character references will have a 0 added to them
2273          * to ensure that round-trips do not alter the original data.
2274          *
2275          * @param string $invalue
2276          * @return string
2277          * @private
2278          */
2279         function makesafe( $invalue ) {
2280                 // Armor existing references for reversability.
2281                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
2282
2283                 $bytesleft = 0;
2284                 $result = "";
2285                 $working = 0;
2286                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2287                         $bytevalue = ord( $invalue{$i} );
2288                         if ( $bytevalue <= 0x7F ) { //0xxx xxxx
2289                                 $result .= chr( $bytevalue );
2290                                 $bytesleft = 0;
2291                         } elseif ( $bytevalue <= 0xBF ) { //10xx xxxx
2292                                 $working = $working << 6;
2293                                 $working += ($bytevalue & 0x3F);
2294                                 $bytesleft--;
2295                                 if ( $bytesleft <= 0 ) {
2296                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
2297                                 }
2298                         } elseif ( $bytevalue <= 0xDF ) { //110x xxxx
2299                                 $working = $bytevalue & 0x1F;
2300                                 $bytesleft = 1;
2301                         } elseif ( $bytevalue <= 0xEF ) { //1110 xxxx
2302                                 $working = $bytevalue & 0x0F;
2303                                 $bytesleft = 2;
2304                         } else { //1111 0xxx
2305                                 $working = $bytevalue & 0x07;
2306                                 $bytesleft = 3;
2307                         }
2308                 }
2309                 return $result;
2310         }
2311
2312         /**
2313          * Reverse the previously applied transliteration of non-ASCII characters
2314          * back to UTF-8. Used to protect data from corruption by broken web browsers
2315          * as listed in $wgBrowserBlackList.
2316          *
2317          * @param string $invalue
2318          * @return string
2319          * @private
2320          */
2321         function unmakesafe( $invalue ) {
2322                 $result = "";
2323                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2324                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
2325                                 $i += 3;
2326                                 $hexstring = "";
2327                                 do {
2328                                         $hexstring .= $invalue{$i};
2329                                         $i++;
2330                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
2331
2332                                 // Do some sanity checks. These aren't needed for reversability,
2333                                 // but should help keep the breakage down if the editor
2334                                 // breaks one of the entities whilst editing.
2335                                 if ( (substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6) ) {
2336                                         $codepoint = hexdec($hexstring);
2337                                         $result .= codepointToUtf8( $codepoint );
2338                                 } else {
2339                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
2340                                 }
2341                         } else {
2342                                 $result .= substr( $invalue, $i, 1 );
2343                         }
2344                 }
2345                 // reverse the transform that we made for reversability reasons.
2346                 return strtr( $result, array( "&#x0" => "&#x" ) );
2347         }
2348
2349         function noCreatePermission() {
2350                 global $wgOut;
2351                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
2352                 $wgOut->addWikiMsg( 'nocreatetext' );
2353         }
2354
2355         /**
2356          * If there are rows in the deletion log for this page, show them,
2357          * along with a nice little note for the user
2358          *
2359          * @param OutputPage $out
2360          */
2361         protected function showDeletionLog( $out ) {
2362                 global $wgUser;
2363                 $loglist = new LogEventsList( $wgUser->getSkin(), $out );
2364                 $pager = new LogPager( $loglist, 'delete', false, $this->mTitle->getPrefixedText() );
2365                 $count = $pager->getNumRows();
2366                 if ( $count > 0 ) {
2367                         $pager->mLimit = 10;
2368                         $out->addHTML( '<div class="mw-warning-with-logexcerpt">' );
2369                         $out->addWikiMsg( 'recreate-deleted-warn' );
2370                         $out->addHTML(
2371                                 $loglist->beginLogEventsList() .
2372                                 $pager->getBody() .
2373                                 $loglist->endLogEventsList()
2374                         );
2375                         if($count > 10){
2376                                 $out->addHTML( $wgUser->getSkin()->link(
2377                                         SpecialPage::getTitleFor( 'Log' ),
2378                                         wfMsgHtml( 'deletelog-fulllog' ),
2379                                         array(),
2380                                         array(
2381                                                 'type' => 'delete',
2382                                                 'page' => $this->mTitle->getPrefixedText() ) ) );
2383                         }
2384                         $out->addHTML( '</div>' );
2385                         return true;
2386                 }
2387
2388                 return false;
2389         }
2390
2391         /**
2392          * Attempt submission
2393          * @return bool false if output is done, true if the rest of the form should be displayed
2394          */
2395         function attemptSave() {
2396                 global $wgUser, $wgOut, $wgTitle, $wgRequest;
2397
2398                 $resultDetails = false;
2399                 $value = $this->internalAttemptSave( $resultDetails, $wgUser->isAllowed('bot') && $wgRequest->getBool('bot', true) );
2400
2401                 if ( $value == self::AS_SUCCESS_UPDATE || $value == self::AS_SUCCESS_NEW_ARTICLE ) {
2402                         $this->didSave = true;
2403                 }
2404
2405                 switch ($value) {
2406                         case self::AS_HOOK_ERROR_EXPECTED:
2407                         case self::AS_CONTENT_TOO_BIG:
2408                         case self::AS_ARTICLE_WAS_DELETED:
2409                         case self::AS_CONFLICT_DETECTED:
2410                         case self::AS_SUMMARY_NEEDED:
2411                         case self::AS_TEXTBOX_EMPTY:
2412                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
2413                         case self::AS_END:
2414                                 return true;
2415
2416                         case self::AS_HOOK_ERROR:
2417                         case self::AS_FILTERING:
2418                         case self::AS_SUCCESS_NEW_ARTICLE:
2419                         case self::AS_SUCCESS_UPDATE:
2420                                 return false;
2421
2422                         case self::AS_SPAM_ERROR:
2423                                 $this->spamPage ( $resultDetails['spam'] );
2424                                 return false;
2425
2426                         case self::AS_BLOCKED_PAGE_FOR_USER:
2427                                 $this->blockedPage();
2428                                 return false;
2429
2430                         case self::AS_IMAGE_REDIRECT_ANON:
2431                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
2432                                 return false;
2433
2434                         case self::AS_READ_ONLY_PAGE_ANON:
2435                                 $this->userNotLoggedInPage();
2436                                 return false;
2437
2438                         case self::AS_READ_ONLY_PAGE_LOGGED:
2439                         case self::AS_READ_ONLY_PAGE:
2440                                 $wgOut->readOnlyPage();
2441                                 return false;
2442
2443                         case self::AS_RATE_LIMITED:
2444                                 $wgOut->rateLimited();
2445                                 return false;
2446
2447                         case self::AS_NO_CREATE_PERMISSION;
2448                                 $this->noCreatePermission();
2449                                 return;
2450
2451                         case self::AS_BLANK_ARTICLE:
2452                                 $wgOut->redirect( $wgTitle->getFullURL() );
2453                                 return false;
2454
2455                         case self::AS_IMAGE_REDIRECT_LOGGED:
2456                                 $wgOut->permissionRequired( 'upload' );
2457                                 return false;
2458                 }
2459         }
2460
2461         function getBaseRevision() {
2462                 if ( $this->mBaseRevision == false ) {
2463                         $db = wfGetDB( DB_MASTER );
2464                         $baseRevision = Revision::loadFromTimestamp(
2465                                 $db, $this->mTitle, $this->edittime );
2466                         return $this->mBaseRevision = $baseRevision;
2467                 } else {
2468                         return $this->mBaseRevision;
2469                 }
2470         }
2471 }