includes/EditPage.php

   1 <?php
   2 /**
   3  * Contains the EditPage class
   4  * @file
   5  */
   6
   7 /**
   8  * The edit page/HTML interface (split from Article)
   9  * The actual database and text munging is still in Article,
  10  * but it should get easier to call those from alternate
  11  * interfaces.
  12  *
  13  * EditPage cares about two distinct titles:
  14  * $wgTitle is the page that forms submit to, links point to,
  15  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  16  * page in the database that is actually being edited. These are
  17  * usually the same, but they are now allowed to be different.
  18  */
  19 class EditPage {
  20         const AS_SUCCESS_UPDATE                 = 200;
  21         const AS_SUCCESS_NEW_ARTICLE            = 201;
  22         const AS_HOOK_ERROR                     = 210;
  23         const AS_FILTERING                      = 211;
  24         const AS_HOOK_ERROR_EXPECTED            = 212;
  25         const AS_BLOCKED_PAGE_FOR_USER          = 215;
  26         const AS_CONTENT_TOO_BIG                = 216;
  27         const AS_USER_CANNOT_EDIT               = 217;
  28         const AS_READ_ONLY_PAGE_ANON            = 218;
  29         const AS_READ_ONLY_PAGE_LOGGED          = 219;
  30         const AS_READ_ONLY_PAGE                 = 220;
  31         const AS_RATE_LIMITED                   = 221;
  32         const AS_ARTICLE_WAS_DELETED            = 222;
  33         const AS_NO_CREATE_PERMISSION           = 223;
  34         const AS_BLANK_ARTICLE                  = 224;
  35         const AS_CONFLICT_DETECTED              = 225;
  36         const AS_SUMMARY_NEEDED                 = 226;
  37         const AS_TEXTBOX_EMPTY                  = 228;
  38         const AS_MAX_ARTICLE_SIZE_EXCEEDED      = 229;
  39         const AS_OK                             = 230;
  40         const AS_END                            = 231;
  41         const AS_SPAM_ERROR                     = 232;
  42         const AS_IMAGE_REDIRECT_ANON            = 233;
  43         const AS_IMAGE_REDIRECT_LOGGED          = 234;
  44
  45         var $mArticle;
  46         var $mTitle;
  47         var $action;
  48         var $mMetaData = '';
  49         var $isConflict = false;
  50         var $isCssJsSubpage = false;
  51         var $deletedSinceEdit = false;
  52         var $formtype;
  53         var $firsttime;
  54         var $lastDelete;
  55         var $mTokenOk = false;
  56         var $mTokenOkExceptSuffix = false;
  57         var $mTriedSave = false;
  58         var $tooBig = false;
  59         var $kblength = false;
  60         var $missingComment = false;
  61         var $missingSummary = false;
  62         var $allowBlankSummary = false;
  63         var $autoSumm = '';
  64         var $hookError = '';
  65         #var $mPreviewTemplates;
  66         var $mParserOutput;
  67         var $mBaseRevision = false;
  68
  69         # Form values
  70         var $save = false, $preview = false, $diff = false;
  71         var $minoredit = false, $watchthis = false, $recreate = false;
  72         var $textbox1 = '', $textbox2 = '', $summary = '';
  73         var $edittime = '', $section = '', $starttime = '';
  74         var $oldid = 0, $editintro = '', $scrolltop = null;
  75
  76         # Placeholders for text injection by hooks (must be HTML)
  77         # extensions should take care to _append_ to the present value
  78         public $editFormPageTop; // Before even the preview
  79         public $editFormTextTop;
  80         public $editFormTextBeforeContent;
  81         public $editFormTextAfterWarn;
  82         public $editFormTextAfterTools;
  83         public $editFormTextBottom;
  84
  85         /* $didSave should be set to true whenever an article was succesfully altered. */
  86         public $didSave = false;
  87
  88         public $suppressIntro = false;
  89
  90         /**
  91          * @todo document
  92          * @param $article
  93          */
  94         function EditPage( $article ) {
  95                 $this->mArticle =& $article;
  96                 $this->mTitle = $article->getTitle();
  97                 $this->action = 'submit';
  98
  99                 # Placeholders for text injection by hooks (empty per default)
 100                 $this->editFormPageTop =
 101                 $this->editFormTextTop =
 102                 $this->editFormTextBeforeContent =
 103                 $this->editFormTextAfterWarn =
 104                 $this->editFormTextAfterTools =
 105                 $this->editFormTextBottom = "";
 106         }
 107
 108         /**
 109          * Fetch initial editing page content.
 110          * @private
 111          */
 112         function getContent( $def_text = '' ) {
 113                 global $wgOut, $wgRequest, $wgParser, $wgContLang, $wgMessageCache;
 114
 115                 wfProfileIn( __METHOD__ );
 116                 # Get variables from query string :P
 117                 $section = $wgRequest->getVal( 'section' );
 118                 $preload = $wgRequest->getVal( 'preload' );
 119                 $undoafter = $wgRequest->getVal( 'undoafter' );
 120                 $undo = $wgRequest->getVal( 'undo' );
 121
 122                 $text = '';
 123                 // For message page not locally set, use the i18n message.
 124                 // For other non-existent articles, use preload text if any.
 125                 if ( !$this->mTitle->exists() ) {
 126                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 127                                 # If this is a system message, get the default text.
 128                                 list( $message, $lang ) = $wgMessageCache->figureMessage( $wgContLang->lcfirst( $this->mTitle->getText() ) );
 129                                 $wgMessageCache->loadAllMessages( $lang );
 130                                 $text = wfMsgGetKey( $message, false, $lang, false );
 131                                 if( wfEmptyMsg( $message, $text ) )
 132                                         $text = '';
 133                         } else {
 134                                 # If requested, preload some text.
 135                                 $text = $this->getPreloadedText( $preload );
 136                         }
 137                 // For existing pages, get text based on "undo" or section parameters.
 138                 } else {
 139                         $text = $this->mArticle->getContent();
 140                         if ( $undo > 0 && $undoafter > 0 && $undo < $undoafter ) {
 141                                 # If they got undoafter and undo round the wrong way, switch them
 142                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 143                         }
 144                         if ( $undo > 0 && $undo > $undoafter ) {
 145                                 # Undoing a specific edit overrides section editing; section-editing
 146                                 # doesn't work with undoing.
 147                                 if ( $undoafter ) {
 148                                         $undorev = Revision::newFromId($undo);
 149                                         $oldrev = Revision::newFromId($undoafter);
 150                                 } else {
 151                                         $undorev = Revision::newFromId($undo);
 152                                         $oldrev = $undorev ? $undorev->getPrevious() : null;
 153                                 }
 154
 155                                 # Sanity check, make sure it's the right page,
 156                                 # the revisions exist and they were not deleted.
 157                                 # Otherwise, $text will be left as-is.
 158                                 if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 159                                         $undorev->getPage() == $oldrev->getPage() &&
 160                                         $undorev->getPage() == $this->mArticle->getID() &&
 161                                         !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 162                                         !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 163                                         $undorev_text = $undorev->getText();
 164                                         $oldrev_text = $oldrev->getText();
 165                                         $currev_text = $text;
 166
 167                                         if ( $currev_text != $undorev_text ) {
 168                                                 $result = wfMerge( $undorev_text, $oldrev_text, $currev_text, $text );
 169                                         } else {
 170                                                 # No use doing a merge if it's just a straight revert.
 171                                                 $text = $oldrev_text;
 172                                                 $result = true;
 173                                         }
 174                                         if ( $result ) {
 175                                                 # Inform the user of our success and set an automatic edit summary
 176                                                 $this->editFormPageTop .= $wgOut->parse( wfMsgNoTrans( 'undo-success' ) );
 177                                                 $firstrev = $oldrev->getNext();
 178                                                 # If we just undid one rev, use an autosummary
 179                                                 if ( $firstrev->mId == $undo ) {
 180                                                         $this->summary = wfMsgForContent('undo-summary', $undo, $undorev->getUserText());
 181                                                 }
 182                                                 $this->formtype = 'diff';
 183                                         } else {
 184                                                 # Warn the user that something went wrong
 185                                                 $this->editFormPageTop .= $wgOut->parse( wfMsgNoTrans( 'undo-failure' ) );
 186                                         }
 187                                 } else {
 188                                         // Failed basic sanity checks.
 189                                         // Older revisions may have been removed since the link
 190                                         // was created, or we may simply have got bogus input.
 191                                         $this->editFormPageTop .= $wgOut->parse( wfMsgNoTrans( 'undo-norev' ) );
 192                                 }
 193                         } else if ( $section != '' ) {
 194                                 if ( $section == 'new' ) {
 195                                         $text = $this->getPreloadedText( $preload );
 196                                 } else {
 197                                         $text = $wgParser->getSection( $text, $section, $def_text );
 198                                 }
 199                         }
 200                 }
 201
 202                 wfProfileOut( __METHOD__ );
 203                 return $text;
 204         }
 205
 206         /**
 207          * Get the contents of a page from its title and remove includeonly tags
 208          *
 209          * @param $preload String: the title of the page.
 210          * @return string The contents of the page.
 211          */
 212         protected function getPreloadedText( $preload ) {
 213                 if ( $preload === '' ) {
 214                         return '';
 215                 } else {
 216                         $preloadTitle = Title::newFromText( $preload );
 217                         if ( isset( $preloadTitle ) && $preloadTitle->userCanRead() ) {
 218                                 $rev = Revision::newFromTitle($preloadTitle);
 219                                 if ( is_object( $rev ) ) {
 220                                         $text = $rev->getText();
 221                                         // TODO FIXME: AAAAAAAAAAA, this shouldn't be implementing
 222                                         // its own mini-parser! -ævar
 223                                         $text = preg_replace( '~</?includeonly>~', '', $text );
 224                                         return $text;
 225                                 } else
 226                                         return '';
 227                         }
 228                 }
 229         }
 230
 231         /**
 232          * This is the function that extracts metadata from the article body on the first view.
 233          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
 234          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
 235          */
 236         function extractMetaDataFromArticle () {
 237                 global $wgUseMetadataEdit, $wgMetadataWhitelist, $wgContLang;
 238                 $this->mMetaData = '';
 239                 if ( !$wgUseMetadataEdit ) return;
 240                 if ( $wgMetadataWhitelist == '' ) return;
 241                 $s = '';
 242                 $t = $this->getContent();
 243
 244                 # MISSING : <nowiki> filtering
 245
 246                 # Categories and language links
 247                 $t = explode ( "\n" , $t );
 248                 $catlow = strtolower ( $wgContLang->getNsText( NS_CATEGORY ) );
 249                 $cat = $ll = array();
 250                 foreach ( $t AS $key => $x ) {
 251                         $y = trim ( strtolower ( $x ) );
 252                         while ( substr ( $y , 0 , 2 ) == '[[' ) {
 253                                 $y = explode ( ']]' , trim ( $x ) );
 254                                 $first = array_shift ( $y );
 255                                 $first = explode ( ':' , $first );
 256                                 $ns = array_shift ( $first );
 257                                 $ns = trim ( str_replace ( '[' , '' , $ns ) );
 258                                 if ( $wgContLang->getLanguageName( $ns ) || strtolower ( $ns ) == $catlow ) {
 259                                         $add = '[[' . $ns . ':' . implode ( ':' , $first ) . ']]';
 260                                         if ( strtolower ( $ns ) == $catlow ) $cat[] = $add;
 261                                         else $ll[] = $add;
 262                                         $x = implode ( ']]' , $y );
 263                                         $t[$key] = $x;
 264                                         $y = trim ( strtolower ( $x ) );
 265                                 } else {
 266                                         $x = implode ( ']]' , $y );
 267                                         $y = trim ( strtolower ( $x ) );
 268                                 }
 269                         }
 270                 }
 271                 if ( count ( $cat ) ) $s .= implode ( ' ' , $cat ) . "\n";
 272                 if ( count ( $ll ) ) $s .= implode ( ' ' , $ll ) . "\n";
 273                 $t = implode ( "\n" , $t );
 274
 275                 # Load whitelist
 276                 $sat = array () ; # stand-alone-templates; must be lowercase
 277                 $wl_title = Title::newFromText ( $wgMetadataWhitelist );
 278                 $wl_article = new Article ( $wl_title );
 279                 $wl = explode ( "\n" , $wl_article->getContent() );
 280                 foreach ( $wl AS $x ) {
 281                         $isentry = false;
 282                         $x = trim ( $x );
 283                         while ( substr ( $x , 0 , 1 ) == '*' ) {
 284                                 $isentry = true;
 285                                 $x = trim ( substr ( $x , 1 ) );
 286                         }
 287                         if ( $isentry ) {
 288                                 $sat[] = strtolower ( $x );
 289                         }
 290
 291                 }
 292
 293                 # Templates, but only some
 294                 $t = explode ( '{{' , $t );
 295                 $tl = array () ;
 296                 foreach ( $t AS $key => $x ) {
 297                         $y = explode ( '}}' , $x , 2 );
 298                         if ( count ( $y ) == 2 ) {
 299                                 $z = $y[0];
 300                                 $z = explode ( '|' , $z );
 301                                 $tn = array_shift ( $z );
 302                                 if ( in_array ( strtolower ( $tn ) , $sat ) ) {
 303                                         $tl[] = '{{' . $y[0] . '}}';
 304                                         $t[$key] = $y[1];
 305                                         $y = explode ( '}}' , $y[1] , 2 );
 306                                 }
 307                                 else $t[$key] = '{{' . $x;
 308                         }
 309                         else if ( $key != 0 ) $t[$key] = '{{' . $x;
 310                         else $t[$key] = $x;
 311                 }
 312                 if ( count ( $tl ) ) $s .= implode ( ' ' , $tl );
 313                 $t = implode ( '' , $t );
 314
 315                 $t = str_replace ( "\n\n\n" , "\n" , $t );
 316                 $this->mArticle->mContent = $t;
 317                 $this->mMetaData = $s;
 318         }
 319
 320         /*
 321          * Check if a page was deleted while the user was editing it, before submit.
 322          * Note that we rely on the logging table, which hasn't been always there,
 323          * but that doesn't matter, because this only applies to brand new
 324          * deletes.
 325          */
 326         protected function wasDeletedSinceLastEdit() {
 327                 if ( $this->deletedSinceEdit )
 328                         return true;
 329                 if ( $this->mTitle->isDeleted() ) {
 330                         $this->lastDelete = $this->getLastDelete();
 331                         if ( $this->lastDelete ) {
 332                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
 333                                 if ( $deleteTime > $this->starttime ) {
 334                                         $this->deletedSinceEdit = true;
 335                                 }
 336                         }
 337                 }
 338                 return $this->deletedSinceEdit;
 339         }
 340
 341         function submit() {
 342                 $this->edit();
 343         }
 344
 345         /**
 346          * This is the function that gets called for "action=edit". It
 347          * sets up various member variables, then passes execution to
 348          * another function, usually showEditForm()
 349          *
 350          * The edit form is self-submitting, so that when things like
 351          * preview and edit conflicts occur, we get the same form back
 352          * with the extra stuff added.  Only when the final submission
 353          * is made and all is well do we actually save and redirect to
 354          * the newly-edited page.
 355          */
 356         function edit() {
 357                 global $wgOut, $wgUser, $wgRequest;
 358                 // Allow extensions to modify/prevent this form or submission
 359                 if ( !wfRunHooks( 'AlternateEdit', array( &$this ) ) ) {
 360                         return;
 361                 }
 362
 363                 wfProfileIn( __METHOD__ );
 364                 wfDebug( __METHOD__.": enter\n" );
 365
 366                 // This is not an article
 367                 $wgOut->setArticleFlag( false );
 368
 369                 $this->importFormData( $wgRequest );
 370                 $this->firsttime = false;
 371
 372                 if ( $this->live ) {
 373                         $this->livePreview();
 374                         wfProfileOut( __METHOD__ );
 375                         return;
 376                 }
 377
 378                 if ( wfReadOnly() && $this->save ) {
 379                                 // Force preview
 380                                 $this->save = false;
 381                                 $this->preview = true;
 382                 }
 383
 384                 $wgOut->addScriptFile( 'edit.js' );
 385                 $permErrors = $this->getEditPermissionErrors();
 386                 if ( $permErrors ) {
 387                         wfDebug( __METHOD__.": User can't edit\n" );
 388                         $this->readOnlyPage( $this->getContent(), true, $permErrors, 'edit' );
 389                         wfProfileOut( __METHOD__ );
 390                         return;
 391                 } else {
 392                         if ( $this->save ) {
 393                                 $this->formtype = 'save';
 394                         } else if ( $this->preview ) {
 395                                 $this->formtype = 'preview';
 396                         } else if ( $this->diff ) {
 397                                 $this->formtype = 'diff';
 398                         } else { # First time through
 399                                 $this->firsttime = true;
 400                                 if ( $this->previewOnOpen() ) {
 401                                         $this->formtype = 'preview';
 402                                 } else {
 403                                         $this->extractMetaDataFromArticle () ;
 404                                         $this->formtype = 'initial';
 405                                 }
 406                         }
 407                 }
 408
 409                 wfProfileIn( __METHOD__."-business-end" );
 410
 411                 $this->isConflict = false;
 412                 // css / js subpages of user pages get a special treatment
 413                 $this->isCssJsSubpage      = $this->mTitle->isCssJsSubpage();
 414                 $this->isValidCssJsSubpage = $this->mTitle->isValidCssJsSubpage();
 415
 416                 # Show applicable editing introductions
 417                 if ( $this->formtype == 'initial' || $this->firsttime )
 418                         $this->showIntro();
 419
 420                 if ( $this->mTitle->isTalkPage() ) {
 421                         $wgOut->addWikiMsg( 'talkpagetext' );
 422                 }
 423
 424                 # Optional notices on a per-namespace and per-page basis
 425                 $editnotice_ns   = 'editnotice-'.$this->mTitle->getNamespace();
 426                 $editnotice_page = $editnotice_ns.'-'.$this->mTitle->getDBkey();
 427                 if ( !wfEmptyMsg( $editnotice_ns, wfMsgForContent( $editnotice_ns ) ) ) {
 428                         $wgOut->addWikiText( wfMsgForContent( $editnotice_ns )  );
 429                 }
 430                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
 431                         $parts = explode( '/', $this->mTitle->getDBkey() );
 432                         $editnotice_base = $editnotice_ns;
 433                         while ( count( $parts ) > 0 ) {
 434                                 $editnotice_base .= '-'.array_shift( $parts );
 435                                 if ( !wfEmptyMsg( $editnotice_base, wfMsgForContent( $editnotice_base ) ) ) {
 436                                         $wgOut->addWikiText( wfMsgForContent( $editnotice_base )  );
 437                                 }
 438                         }
 439                 } else if ( !wfEmptyMsg( $editnotice_page, wfMsgForContent( $editnotice_page ) ) ) {
 440                         $wgOut->addWikiText( wfMsgForContent( $editnotice_page ) );
 441                 }
 442
 443                 # Attempt submission here.  This will check for edit conflicts,
 444                 # and redundantly check for locked database, blocked IPs, etc.
 445                 # that edit() already checked just in case someone tries to sneak
 446                 # in the back door with a hand-edited submission URL.
 447
 448                 if ( 'save' == $this->formtype ) {
 449                         if ( !$this->attemptSave() ) {
 450                                 wfProfileOut( __METHOD__."-business-end" );
 451                                 wfProfileOut( __METHOD__ );
 452                                 return;
 453                         }
 454                 }
 455
 456                 # First time through: get contents, set time for conflict
 457                 # checking, etc.
 458                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 459                         if ( $this->initialiseForm() === false) {
 460                                 $this->noSuchSectionPage();
 461                                 wfProfileOut( __METHOD__."-business-end" );
 462                                 wfProfileOut( __METHOD__ );
 463                                 return;
 464                         }
 465                         if ( !$this->mTitle->getArticleId() )
 466                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 467                 }
 468
 469                 $this->showEditForm();
 470                 wfProfileOut( __METHOD__."-business-end" );
 471                 wfProfileOut( __METHOD__ );
 472         }
 473
 474         protected function getEditPermissionErrors() {
 475                 global $wgUser;
 476                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 477                 # Can this title be created?
 478                 if ( !$this->mTitle->exists() ) {
 479                         $permErrors = array_merge( $permErrors,
 480                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 481                 }
 482                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 483                 $remove = array();
 484                 foreach( $permErrors as $error ) {
 485                         if ( ($this->preview || $this->diff) &&
 486                                 ($error[0] == 'blockedtext' || $error[0] == 'autoblockedtext') )
 487                         {
 488                                 $remove[] = $error;
 489                         }
 490                 }
 491                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 492                 return $permErrors;
 493         }
 494
 495         /**
 496          * Show a read-only error
 497          * Parameters are the same as OutputPage:readOnlyPage()
 498          * Redirect to the article page if redlink=1
 499          */
 500         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 501                 global $wgRequest, $wgOut;
 502                 if ( $wgRequest->getBool( 'redlink' ) ) {
 503                         // The edit page was reached via a red link.
 504                         // Redirect to the article page and let them click the edit tab if
 505                         // they really want a permission error.
 506                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 507                 } else {
 508                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 509                 }
 510         }
 511
 512         /**
 513          * Should we show a preview when the edit form is first shown?
 514          *
 515          * @return bool
 516          */
 517         protected function previewOnOpen() {
 518                 global $wgRequest, $wgUser;
 519                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 520                         // Explicit override from request
 521                         return true;
 522                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 523                         // Explicit override from request
 524                         return false;
 525                 } elseif ( $this->section == 'new' ) {
 526                         // Nothing *to* preview for new sections
 527                         return false;
 528                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== '' || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 529                         // Standard preference behaviour
 530                         return true;
 531                 } elseif ( !$this->mTitle->exists() && $this->mTitle->getNamespace() == NS_CATEGORY ) {
 532                         // Categories are special
 533                         return true;
 534                 } else {
 535                         return false;
 536                 }
 537         }
 538
 539         /**
 540          * @todo document
 541          * @param $request
 542          */
 543         function importFormData( &$request ) {
 544                 global $wgLang, $wgUser;
 545                 $fname = 'EditPage::importFormData';
 546                 wfProfileIn( $fname );
 547
 548                 # Section edit can come from either the form or a link
 549                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 550
 551                 if ( $request->wasPosted() ) {
 552                         # These fields need to be checked for encoding.
 553                         # Also remove trailing whitespace, but don't remove _initial_
 554                         # whitespace from the text boxes. This may be significant formatting.
 555                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 556                         $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
 557                         $this->mMetaData = rtrim( $request->getText( 'metadata' ) );
 558                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 559                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary'  ), 250 );
 560
 561                         # Remove extra headings from summaries and new sections.
 562                         $this->summary = preg_replace('/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary);
 563
 564                         $this->edittime = $request->getVal( 'wpEdittime' );
 565                         $this->starttime = $request->getVal( 'wpStarttime' );
 566
 567                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 568
 569                         if ( is_null($this->section) || !$this->edittime || !$this->starttime ) {
 570                                 # If the form is incomplete, force to preview.
 571                                 wfDebug( "$fname: Form data appears to be incomplete\n" );
 572                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 573                                 $this->preview  = true;
 574                         } else {
 575                                 /* Fallback for live preview */
 576                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 577                                 $this->diff = $request->getCheck( 'wpDiff' );
 578
 579                                 // Remember whether a save was requested, so we can indicate
 580                                 // if we forced preview due to session failure.
 581                                 $this->mTriedSave = !$this->preview;
 582
 583                                 if ( $this->tokenOk( $request ) ) {
 584                                         # Some browsers will not report any submit button
 585                                         # if the user hits enter in the comment box.
 586                                         # The unmarked state will be assumed to be a save,
 587                                         # if the form seems otherwise complete.
 588                                         wfDebug( "$fname: Passed token check.\n" );
 589                                 } else if ( $this->diff ) {
 590                                         # Failed token check, but only requested "Show Changes".
 591                                         wfDebug( "$fname: Failed token check; Show Changes requested.\n" );
 592                                 } else {
 593                                         # Page might be a hack attempt posted from
 594                                         # an external site. Preview instead of saving.
 595                                         wfDebug( "$fname: Failed token check; forcing preview\n" );
 596                                         $this->preview = true;
 597                                 }
 598                         }
 599                         $this->save = !$this->preview && !$this->diff;
 600                         if ( !preg_match( '/^\d{14}$/', $this->edittime )) {
 601                                 $this->edittime = null;
 602                         }
 603
 604                         if ( !preg_match( '/^\d{14}$/', $this->starttime )) {
 605                                 $this->starttime = null;
 606                         }
 607
 608                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 609
 610                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 611                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 612
 613                         # Don't force edit summaries when a user is editing their own user or talk page
 614                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 615                                 $this->mTitle->getText() == $wgUser->getName() )
 616                         {
 617                                 $this->allowBlankSummary = true;
 618                         } else {
 619                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary');
 620                         }
 621
 622                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 623                 } else {
 624                         # Not a posted form? Start with nothing.
 625                         wfDebug( "$fname: Not a posted form.\n" );
 626                         $this->textbox1  = '';
 627                         $this->textbox2  = '';
 628                         $this->mMetaData = '';
 629                         $this->summary   = '';
 630                         $this->edittime  = '';
 631                         $this->starttime = wfTimestampNow();
 632                         $this->edit      = false;
 633                         $this->preview   = false;
 634                         $this->save      = false;
 635                         $this->diff      = false;
 636                         $this->minoredit = false;
 637                         $this->watchthis = false;
 638                         $this->recreate  = false;
 639
 640                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 641                                 $this->summary = $request->getVal( 'preloadtitle' );
 642                         }
 643                 }
 644
 645                 $this->oldid = $request->getInt( 'oldid' );
 646
 647                 $this->live = $request->getCheck( 'live' );
 648                 $this->editintro = $request->getText( 'editintro' );
 649
 650                 wfProfileOut( $fname );
 651         }
 652
 653         /**
 654          * Make sure the form isn't faking a user's credentials.
 655          *
 656          * @param $request WebRequest
 657          * @return bool
 658          * @private
 659          */
 660         function tokenOk( &$request ) {
 661                 global $wgUser;
 662                 $token = $request->getVal( 'wpEditToken' );
 663                 $this->mTokenOk = $wgUser->matchEditToken( $token );
 664                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
 665                 return $this->mTokenOk;
 666         }
 667
 668         /**
 669          * Show all applicable editing introductions
 670          */
 671         protected function showIntro() {
 672                 global $wgOut, $wgUser;
 673                 if ( $this->suppressIntro ) {
 674                         return;
 675                 }
 676                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exists
 677                 if ( $this->mTitle->getNamespace() == NS_USER || $this->mTitle->getNamespace() == NS_USER_TALK ) {
 678                         $parts = explode( '/', $this->mTitle->getText(), 2 );
 679                         $username = $parts[0];
 680                         $id = User::idFromName( $username );
 681                         $ip = User::isIP( $username );
 682                         if ( $id == 0 && !$ip ) {
 683                                 $wgOut->wrapWikiMsg( '<div class="mw-userpage-userdoesnotexist error">$1</div>',
 684                                         array( 'userpage-userdoesnotexist', $username ) );
 685                         }
 686                 }
 687                 # Try to add a custom edit intro, or use the standard one if this is not possible.
 688                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
 689                         if ( $wgUser->isLoggedIn() ) {
 690                                 $wgOut->wrapWikiMsg( '<div class="mw-newarticletext">$1</div>', 'newarticletext' );
 691                         } else {
 692                                 $wgOut->wrapWikiMsg( '<div class="mw-newarticletextanon">$1</div>', 'newarticletextanon' );
 693                         }
 694                 }
 695                 # Give a notice if the user is editing a deleted page...
 696                 if ( !$this->mTitle->exists() ) {
 697                         $this->showDeletionLog( $wgOut );
 698                 }
 699         }
 700
 701         /**
 702          * Attempt to show a custom editing introduction, if supplied
 703          *
 704          * @return bool
 705          */
 706         protected function showCustomIntro() {
 707                 if ( $this->editintro ) {
 708                         $title = Title::newFromText( $this->editintro );
 709                         if ( $title instanceof Title && $title->exists() && $title->userCanRead() ) {
 710                                 global $wgOut;
 711                                 $revision = Revision::newFromTitle( $title );
 712                                 $wgOut->addWikiTextTitleTidy( $revision->getText(), $this->mTitle );
 713                                 return true;
 714                         } else {
 715                                 return false;
 716                         }
 717                 } else {
 718                         return false;
 719                 }
 720         }
 721
 722         /**
 723          * Attempt submission (no UI)
 724          * @return one of the constants describing the result
 725          */
 726         function internalAttemptSave( &$result, $bot = false ) {
 727                 global $wgFilterCallback, $wgUser, $wgOut, $wgParser;
 728                 global $wgMaxArticleSize;
 729
 730                 $fname = 'EditPage::attemptSave';
 731                 wfProfileIn( $fname );
 732                 wfProfileIn( "$fname-checks" );
 733
 734                 if ( !wfRunHooks( 'EditPage::attemptSave', array( &$this ) ) )
 735                 {
 736                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving" );
 737                         return self::AS_HOOK_ERROR;
 738                 }
 739
 740                 # Check image redirect
 741                 if ( $this->mTitle->getNamespace() == NS_IMAGE &&
 742                         Title::newFromRedirect( $this->textbox1 ) instanceof Title &&
 743                         !$wgUser->isAllowed( 'upload' ) ) {
 744                                 if ( $wgUser->isAnon() ) {
 745                                         return self::AS_IMAGE_REDIRECT_ANON;
 746                                 } else {
 747                                         return self::AS_IMAGE_REDIRECT_LOGGED;
 748                                 }
 749                 }
 750
 751                 # Reintegrate metadata
 752                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 753                 $this->mMetaData = '' ;
 754
 755                 # Check for spam
 756                 $match = self::matchSpamRegex( $this->summary );
 757                 if ( $match === false ) {
 758                         $match = self::matchSpamRegex( $this->textbox1 );
 759                 }
 760                 if ( $match !== false ) {
 761                         $result['spam'] = $match;
 762                         $ip = wfGetIP();
 763                         $pdbk = $this->mTitle->getPrefixedDBkey();
 764                         $match = str_replace( "\n", '', $match );
 765                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
 766                         wfProfileOut( "$fname-checks" );
 767                         wfProfileOut( $fname );
 768                         return self::AS_SPAM_ERROR;
 769                 }
 770                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
 771                         # Error messages or other handling should be performed by the filter function
 772                         wfProfileOut( "$fname-checks" );
 773                         wfProfileOut( $fname );
 774                         return self::AS_FILTERING;
 775                 }
 776                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
 777                         # Error messages etc. could be handled within the hook...
 778                         wfProfileOut( "$fname-checks" );
 779                         wfProfileOut( $fname );
 780                         return self::AS_HOOK_ERROR;
 781                 } elseif ( $this->hookError != '' ) {
 782                         # ...or the hook could be expecting us to produce an error
 783                         wfProfileOut( "$fname-checks" );
 784                         wfProfileOut( $fname );
 785                         return self::AS_HOOK_ERROR_EXPECTED;
 786                 }
 787                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 788                         # Check block state against master, thus 'false'.
 789                         wfProfileOut( "$fname-checks" );
 790                         wfProfileOut( $fname );
 791                         return self::AS_BLOCKED_PAGE_FOR_USER;
 792                 }
 793                 $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 794                 if ( $this->kblength > $wgMaxArticleSize ) {
 795                         // Error will be displayed by showEditForm()
 796                         $this->tooBig = true;
 797                         wfProfileOut( "$fname-checks" );
 798                         wfProfileOut( $fname );
 799                         return self::AS_CONTENT_TOO_BIG;
 800                 }
 801
 802                 if ( !$wgUser->isAllowed('edit') ) {
 803                         if ( $wgUser->isAnon() ) {
 804                                 wfProfileOut( "$fname-checks" );
 805                                 wfProfileOut( $fname );
 806                                 return self::AS_READ_ONLY_PAGE_ANON;
 807                         }
 808                         else {
 809                                 wfProfileOut( "$fname-checks" );
 810                                 wfProfileOut( $fname );
 811                                 return self::AS_READ_ONLY_PAGE_LOGGED;
 812                         }
 813                 }
 814
 815                 if ( wfReadOnly() ) {
 816                         wfProfileOut( "$fname-checks" );
 817                         wfProfileOut( $fname );
 818                         return self::AS_READ_ONLY_PAGE;
 819                 }
 820                 if ( $wgUser->pingLimiter() ) {
 821                         wfProfileOut( "$fname-checks" );
 822                         wfProfileOut( $fname );
 823                         return self::AS_RATE_LIMITED;
 824                 }
 825
 826                 # If the article has been deleted while editing, don't save it without
 827                 # confirmation
 828                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
 829                         wfProfileOut( "$fname-checks" );
 830                         wfProfileOut( $fname );
 831                         return self::AS_ARTICLE_WAS_DELETED;
 832                 }
 833
 834                 wfProfileOut( "$fname-checks" );
 835
 836                 # If article is new, insert it.
 837                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 838                 if ( 0 == $aid ) {
 839                         // Late check for create permission, just in case *PARANOIA*
 840                         if ( !$this->mTitle->userCan( 'create' ) ) {
 841                                 wfDebug( "$fname: no create permission\n" );
 842                                 wfProfileOut( $fname );
 843                                 return self::AS_NO_CREATE_PERMISSION;
 844                         }
 845
 846                         # Don't save a new article if it's blank.
 847                         if ( '' == $this->textbox1 ) {
 848                                 wfProfileOut( $fname );
 849                                 return self::AS_BLANK_ARTICLE;
 850                         }
 851
 852                         // Run post-section-merge edit filter
 853                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
 854                                 # Error messages etc. could be handled within the hook...
 855                                 wfProfileOut( $fname );
 856                                 return self::AS_HOOK_ERROR;
 857                         }
 858
 859                         $isComment = ( $this->section == 'new' );
 860
 861                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 862                                 $this->minoredit, $this->watchthis, false, $isComment, $bot);
 863
 864                         wfProfileOut( $fname );
 865                         return self::AS_SUCCESS_NEW_ARTICLE;
 866                 }
 867
 868                 # Article exists. Check for edit conflict.
 869
 870                 $this->mArticle->clear(); # Force reload of dates, etc.
 871                 $this->mArticle->forUpdate( true ); # Lock the article
 872
 873                 wfDebug("timestamp: {$this->mArticle->getTimestamp()}, edittime: {$this->edittime}\n");
 874
 875                 if ( $this->mArticle->getTimestamp() != $this->edittime ) {
 876                         $this->isConflict = true;
 877                         if ( $this->section == 'new' ) {
 878                                 if ( $this->mArticle->getUserText() == $wgUser->getName() &&
 879                                         $this->mArticle->getComment() == $this->summary ) {
 880                                         // Probably a duplicate submission of a new comment.
 881                                         // This can happen when squid resends a request after
 882                                         // a timeout but the first one actually went through.
 883                                         wfDebug( "EditPage::editForm duplicate new section submission; trigger edit conflict!\n" );
 884                                 } else {
 885                                         // New comment; suppress conflict.
 886                                         $this->isConflict = false;
 887                                         wfDebug( "EditPage::editForm conflict suppressed; new section\n" );
 888                                 }
 889                         }
 890                 }
 891                 $userid = $wgUser->getId();
 892
 893                 if ( $this->isConflict ) {
 894                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 895                                 $this->mArticle->getTimestamp() . "')\n" );
 896                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime);
 897                 }
 898                 else {
 899                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 900                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary);
 901                 }
 902                 if ( is_null( $text ) ) {
 903                         wfDebug( "EditPage::editForm activating conflict; section replace failed.\n" );
 904                         $this->isConflict = true;
 905                         $text = $this->textbox1;
 906                 }
 907
 908                 # Suppress edit conflict with self, except for section edits where merging is required.
 909                 if ( $this->section == '' && $userid && $this->userWasLastToEdit($userid,$this->edittime) ) {
 910                         wfDebug( "EditPage::editForm Suppressing edit conflict, same user.\n" );
 911                         $this->isConflict = false;
 912                 } else {
 913                         # switch from section editing to normal editing in edit conflict
 914                         if ( $this->isConflict ) {
 915                                 # Attempt merge
 916                                 if ( $this->mergeChangesInto( $text ) ) {
 917                                         // Successful merge! Maybe we should tell the user the good news?
 918                                         $this->isConflict = false;
 919                                         wfDebug( "EditPage::editForm Suppressing edit conflict, successful merge.\n" );
 920                                 } else {
 921                                         $this->section = '';
 922                                         $this->textbox1 = $text;
 923                                         wfDebug( "EditPage::editForm Keeping edit conflict, failed merge.\n" );
 924                                 }
 925                         }
 926                 }
 927
 928                 if ( $this->isConflict ) {
 929                         wfProfileOut( $fname );
 930                         return self::AS_CONFLICT_DETECTED;
 931                 }
 932
 933                 $oldtext = $this->mArticle->getContent();
 934
 935                 // Run post-section-merge edit filter
 936                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$this->hookError, $this->summary ) ) ) {
 937                         # Error messages etc. could be handled within the hook...
 938                         wfProfileOut( $fname );
 939                         return self::AS_HOOK_ERROR;
 940                 }
 941
 942                 # Handle the user preference to force summaries here, but not for null edits
 943                 if ( $this->section != 'new' && !$this->allowBlankSummary && 0 != strcmp($oldtext, $text) &&
 944                         !is_object( Title::newFromRedirect( $text ) ) # check if it's not a redirect
 945                 ) {
 946                         if ( md5( $this->summary ) == $this->autoSumm ) {
 947                                 $this->missingSummary = true;
 948                                 wfProfileOut( $fname );
 949                                 return self::AS_SUMMARY_NEEDED;
 950                         }
 951                 }
 952
 953                 # And a similar thing for new sections
 954                 if ( $this->section == 'new' && !$this->allowBlankSummary ) {
 955                         if (trim($this->summary) == '') {
 956                                 $this->missingSummary = true;
 957                                 wfProfileOut( $fname );
 958                                 return self::AS_SUMMARY_NEEDED;
 959                         }
 960                 }
 961
 962                 # All's well
 963                 wfProfileIn( "$fname-sectionanchor" );
 964                 $sectionanchor = '';
 965                 if ( $this->section == 'new' ) {
 966                         if ( $this->textbox1 == '' ) {
 967                                 $this->missingComment = true;
 968                                 return self::AS_TEXTBOX_EMPTY;
 969                         }
 970                         if ( $this->summary != '' ) {
 971                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $this->summary );
 972                                 # This is a new section, so create a link to the new section
 973                                 # in the revision summary.
 974                                 $cleanSummary = $wgParser->stripSectionName( $this->summary );
 975                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
 976                         }
 977                 } elseif ( $this->section != '' ) {
 978                         # Try to get a section anchor from the section source, redirect to edited section if header found
 979                         # XXX: might be better to integrate this into Article::replaceSection
 980                         # for duplicate heading checking and maybe parsing
 981                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 982                         # we can't deal with anchors, includes, html etc in the header for now,
 983                         # headline would need to be parsed to improve this
 984                         if ( $hasmatch and strlen($matches[2]) > 0 ) {
 985                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $matches[2] );
 986                         }
 987                 }
 988                 wfProfileOut( "$fname-sectionanchor" );
 989
 990                 // Save errors may fall down to the edit form, but we've now
 991                 // merged the section into full text. Clear the section field
 992                 // so that later submission of conflict forms won't try to
 993                 // replace that into a duplicated mess.
 994                 $this->textbox1 = $text;
 995                 $this->section = '';
 996
 997                 // Check for length errors again now that the section is merged in
 998                 $this->kblength = (int)(strlen( $text ) / 1024);
 999                 if ( $this->kblength > $wgMaxArticleSize ) {
1000                         $this->tooBig = true;
1001                         wfProfileOut( $fname );
1002                         return self::AS_MAX_ARTICLE_SIZE_EXCEEDED;
1003                 }
1004
1005                 # update the article here
1006                 if ( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
1007                         $this->watchthis, $bot, $sectionanchor ) ) {
1008                         wfProfileOut( $fname );
1009                         return self::AS_SUCCESS_UPDATE;
1010                 } else {
1011                         $this->isConflict = true;
1012                 }
1013                 wfProfileOut( $fname );
1014                 return self::AS_END;
1015         }
1016
1017         /**
1018          * Check if no edits were made by other users since
1019          * the time a user started editing the page. Limit to
1020          * 50 revisions for the sake of performance.
1021          */
1022         protected function userWasLastToEdit( $id, $edittime ) {
1023                 $dbw = wfGetDB( DB_MASTER );
1024                 $res = $dbw->select( 'revision',
1025                         'rev_user',
1026                         array(
1027                                 'rev_page' => $this->mArticle->getId(),
1028                                 'rev_timestamp > '.$dbw->addQuotes( $dbw->timestamp($edittime) )
1029                         ),
1030                         __METHOD__,
1031                         array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
1032                 while( $row = $res->fetchObject() ) {
1033                         if( $row->rev_user != $id ) {
1034                                 return false;
1035                         }
1036                 }
1037                 return true;
1038         }
1039
1040         /**
1041          * Check given input text against $wgSpamRegex, and return the text of the first match.
1042          * @return mixed -- matching string or false
1043          */
1044         public static function matchSpamRegex( $text ) {
1045                 global $wgSpamRegex;
1046                 if ( $wgSpamRegex ) {
1047                         // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1048                         $regexes = (array)$wgSpamRegex;
1049                         foreach( $regexes as $regex ) {
1050                                 $matches = array();
1051                                 if ( preg_match( $regex, $text, $matches ) ) {
1052                                         return $matches[0];
1053                                 }
1054                         }
1055                 }
1056                 return false;
1057         }
1058
1059         /**
1060          * Initialise form fields in the object
1061          * Called on the first invocation, e.g. when a user clicks an edit link
1062          */
1063         function initialiseForm() {
1064                 $this->edittime = $this->mArticle->getTimestamp();
1065                 $this->textbox1 = $this->getContent( false );
1066                 if ( $this->textbox1 === false ) return false;
1067                 wfProxyCheck();
1068                 return true;
1069         }
1070
1071         function setHeaders() {
1072                 global $wgOut, $wgTitle;
1073                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1074                 if ( $this->formtype == 'preview' ) {
1075                         $wgOut->setPageTitleActionText( wfMsg( 'preview' ) );
1076                 }
1077                 if ( $this->isConflict ) {
1078                         $wgOut->setPageTitle( wfMsg( 'editconflict', $wgTitle->getPrefixedText() ) );
1079                 } elseif ( $this->section != '' ) {
1080                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1081                         $wgOut->setPageTitle( wfMsg( $msg, $wgTitle->getPrefixedText() ) );
1082                 } else {
1083                         # Use the title defined by DISPLAYTITLE magic word when present
1084                         if ( isset($this->mParserOutput)
1085                          && ( $dt = $this->mParserOutput->getDisplayTitle() ) !== false ) {
1086                                 $title = $dt;
1087                         } else {
1088                                 $title = $wgTitle->getPrefixedText();
1089                         }
1090                         $wgOut->setPageTitle( wfMsg( 'editing', $title ) );
1091                 }
1092         }
1093
1094         /**
1095          * Send the edit form and related headers to $wgOut
1096          * @param $formCallback Optional callable that takes an OutputPage
1097          *                      parameter; will be called during form output
1098          *                      near the top, for captchas and the like.
1099          */
1100         function showEditForm( $formCallback=null ) {
1101                 global $wgOut, $wgUser, $wgLang, $wgContLang, $wgMaxArticleSize, $wgTitle;
1102
1103                 # If $wgTitle is null, that means we're in API mode.
1104                 # Some hook probably called this function  without checking
1105                 # for is_null($wgTitle) first. Bail out right here so we don't
1106                 # do lots of work just to discard it right after.
1107                 if (is_null($wgTitle))
1108                         return;
1109
1110                 $fname = 'EditPage::showEditForm';
1111                 wfProfileIn( $fname );
1112
1113                 $sk = $wgUser->getSkin();
1114
1115                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) ) ;
1116
1117                 #need to parse the preview early so that we know which templates are used,
1118                 #otherwise users with "show preview after edit box" will get a blank list
1119                 #we parse this near the beginning so that setHeaders can do the title
1120                 #setting work instead of leaving it in getPreviewText
1121                 $previewOutput = '';
1122                 if ( $this->formtype == 'preview' ) {
1123                         $previewOutput = $this->getPreviewText();
1124                 }
1125
1126                 $this->setHeaders();
1127
1128                 # Enabled article-related sidebar, toplinks, etc.
1129                 $wgOut->setArticleRelated( true );
1130
1131                 if ( $this->isConflict ) {
1132                         $wgOut->addWikiMsg( 'explainconflict' );
1133
1134                         $this->textbox2 = $this->textbox1;
1135                         $this->textbox1 = $this->getContent();
1136                         $this->edittime = $this->mArticle->getTimestamp();
1137                 } else {
1138                         if ( $this->section != '' && $this->section != 'new' ) {
1139                                 $matches = array();
1140                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
1141                                         preg_match( "/^(=+)(.+)\\1/mi",
1142                                                 $this->textbox1,
1143                                                 $matches );
1144                                         if ( !empty( $matches[2] ) ) {
1145                                                 global $wgParser;
1146                                                 $this->summary = "/* " .
1147                                                         $wgParser->stripSectionName(trim($matches[2])) .
1148                                                         " */ ";
1149                                         }
1150                                 }
1151                         }
1152
1153                         if ( $this->missingComment ) {
1154                                 $wgOut->wrapWikiMsg( '<div id="mw-missingcommenttext">$1</div>',  'missingcommenttext' );
1155                         }
1156
1157                         if ( $this->missingSummary && $this->section != 'new' ) {
1158                                 $wgOut->wrapWikiMsg( '<div id="mw-missingsummary">$1</div>', 'missingsummary' );
1159                         }
1160
1161                         if ( $this->missingSummary && $this->section == 'new' ) {
1162                                 $wgOut->wrapWikiMsg( '<div id="mw-missingcommentheader">$1</div>', 'missingcommentheader' );
1163                         }
1164
1165                         if ( $this->hookError !== '' ) {
1166                                 $wgOut->addWikiText( $this->hookError );
1167                         }
1168
1169                         if ( !$this->checkUnicodeCompliantBrowser() ) {
1170                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
1171                         }
1172                         if ( isset( $this->mArticle ) && isset( $this->mArticle->mRevision ) ) {
1173                         // Let sysop know that this will make private content public if saved
1174
1175                                 if ( !$this->mArticle->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1176                                         $wgOut->addWikiMsg( 'rev-deleted-text-permission' );
1177                                 } else if ( $this->mArticle->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1178                                         $wgOut->addWikiMsg( 'rev-deleted-text-view' );
1179                                 }
1180
1181                                 if ( !$this->mArticle->mRevision->isCurrent() ) {
1182                                         $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
1183                                         $wgOut->addWikiMsg( 'editingold' );
1184                                 }
1185                         }
1186                 }
1187
1188                 if ( wfReadOnly() ) {
1189                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
1190                 } elseif ( $wgUser->isAnon() && $this->formtype != 'preview' ) {
1191                         $wgOut->wrapWikiMsg( '<div id="mw-anon-edit-warning">$1</div>', 'anoneditwarning' );
1192                 } else {
1193                         if ( $this->isCssJsSubpage ) {
1194                                 # Check the skin exists
1195                                 if ( $this->isValidCssJsSubpage ) {
1196                                         if ( $this->formtype !== 'preview' ) {
1197                                                 $wgOut->addWikiMsg( 'usercssjsyoucanpreview' );
1198                                         }
1199                                 } else {
1200                                         $wgOut->addWikiMsg( 'userinvalidcssjstitle', $wgTitle->getSkinFromCssJsSubpage() );
1201                                 }
1202                         }
1203                 }
1204
1205                 $classes = array(); // Textarea CSS
1206                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1207                         # Show a warning if editing an interface message
1208                         $wgOut->addWikiMsg( 'editinginterface' );
1209                 } elseif ( $this->mTitle->isProtected( 'edit' ) ) {
1210                         # Is the title semi-protected?
1211                         if ( $this->mTitle->isSemiProtected() ) {
1212                                 $noticeMsg = 'semiprotectedpagewarning';
1213                                 $classes[] = 'mw-textarea-sprotected';
1214                         } else {
1215                                 # Then it must be protected based on static groups (regular)
1216                                 $noticeMsg = 'protectedpagewarning';
1217                                 $classes[] = 'mw-textarea-protected';
1218                         }
1219                         $wgOut->addHTML( "<div class='mw-warning-with-logexcerpt'>\n" );
1220                         $wgOut->addWikiMsg( $noticeMsg );
1221                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle->getPrefixedText(), '', 1 );
1222                         $wgOut->addHTML( "</div>\n" );
1223                 }
1224                 if ( $this->mTitle->isCascadeProtected() ) {
1225                         # Is this page under cascading protection from some source pages?
1226                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
1227                         $notice = "$1\n";
1228                         if ( count($cascadeSources) > 0 ) {
1229                                 # Explain, and list the titles responsible
1230                                 foreach( $cascadeSources as $page ) {
1231                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
1232                                 }
1233                         }
1234                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', count($cascadeSources) ) );
1235                 }
1236                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
1237                         $wgOut->addWikiMsg( 'titleprotectedwarning' );
1238                 }
1239
1240                 if ( $this->kblength === false ) {
1241                         $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
1242                 }
1243                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
1244                         $wgOut->addHTML( "<div class='error' id='mw-edit-longpageerror'>\n" );
1245                         $wgOut->addWikiMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) );
1246                         $wgOut->addHTML( "</div>\n" );
1247                 } elseif ( $this->kblength > 29 ) {
1248                         $wgOut->addHTML( "<div id='mw-edit-longpagewarning'>\n" );
1249                         $wgOut->addWikiMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) );
1250                         $wgOut->addHTML( "</div>\n" );
1251                 }
1252
1253                 $q = 'action='.$this->action;
1254                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
1255                 $action = $wgTitle->escapeLocalURL( $q );
1256
1257                 $colonSep = wfMsg( 'colon-separator' );
1258                 $summary = wfMsg( 'summary' ) . $colonSep;
1259                 $subject = wfMsg( 'subject' ) . $colonSep;
1260
1261                 $cancel = $sk->makeKnownLink( $wgTitle->getPrefixedText(),
1262                                 wfMsgExt('cancel', array('parseinline')) );
1263                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ));
1264                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
1265                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
1266                         htmlspecialchars( wfMsg( 'newwindow' ) );
1267
1268                 global $wgRightsText;
1269                 if ( $wgRightsText ) {
1270                         $copywarnMsg = array( 'copyrightwarning',
1271                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
1272                                 $wgRightsText );
1273                 } else {
1274                         $copywarnMsg = array( 'copyrightwarning2',
1275                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
1276                 }
1277
1278                 if ( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
1279                         # prepare toolbar for edit buttons
1280                         $toolbar = EditPage::getEditToolbar();
1281                 } else {
1282                         $toolbar = '';
1283                 }
1284
1285                 // activate checkboxes if user wants them to be always active
1286                 if ( !$this->preview && !$this->diff ) {
1287                         # Sort out the "watch" checkbox
1288                         if ( $wgUser->getOption( 'watchdefault' ) ) {
1289                                 # Watch all edits
1290                                 $this->watchthis = true;
1291                         } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1292                                 # Watch creations
1293                                 $this->watchthis = true;
1294                         } elseif ( $this->mTitle->userIsWatching() ) {
1295                                 # Already watched
1296                                 $this->watchthis = true;
1297                         }
1298
1299                         if ( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
1300                 }
1301
1302                 $wgOut->addHTML( $this->editFormPageTop );
1303
1304                 if ( $wgUser->getOption( 'previewontop' ) ) {
1305                         $this->displayPreviewArea( $previewOutput, true );
1306                 }
1307
1308
1309                 $wgOut->addHTML( $this->editFormTextTop );
1310
1311                 # if this is a comment, show a subject line at the top, which is also the edit summary.
1312                 # Otherwise, show a summary field at the bottom
1313                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
1314
1315                 # If a blank edit summary was previously provided, and the appropriate
1316                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1317                 # user being bounced back more than once in the event that a summary
1318                 # is not required.
1319                 #####
1320                 # For a bit more sophisticated detection of blank summaries, hash the
1321                 # automatic one and pass that in the hidden field wpAutoSummary.
1322                 $summaryhiddens =  '';
1323                 if ( $this->missingSummary ) $summaryhiddens .= Xml::hidden( 'wpIgnoreBlankSummary', true );
1324                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1325                 $summaryhiddens .= Xml::hidden( 'wpAutoSummary', $autosumm );
1326                 if ( $this->section == 'new' ) {
1327                         $commentsubject="<span id='wpSummaryLabel'><label for='wpSummary'>{$subject}</label></span>\n<input tabindex='1' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' />{$summaryhiddens}<br />";
1328                         $editsummary = "<div class='editOptions'>\n";
1329                         global $wgParser;
1330                         $formattedSummary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $this->summary ) );
1331                         $subjectpreview = $summarytext && $this->preview ? "<div class=\"mw-summary-preview\">".wfMsg('subject-preview').$colonSep.$sk->commentBlock( $formattedSummary, $this->mTitle, true )."</div>\n" : '';
1332                         $summarypreview = '';
1333                 } else {
1334                         $commentsubject = '';
1335                         $editsummary="<div class='editOptions'>\n<span id='wpSummaryLabel'><label for='wpSummary'>{$summary}</label></span>\n<input tabindex='2' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' />{$summaryhiddens}<br />";
1336                         $summarypreview = $summarytext && $this->preview ? "<div class=\"mw-summary-preview\">".wfMsg('summary-preview').$colonSep.$sk->commentBlock( $this->summary, $this->mTitle )."</div>\n" : '';
1337                         $subjectpreview = '';
1338                 }
1339
1340                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
1341                 if ( !$this->preview && !$this->diff ) {
1342                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
1343                 }
1344                 $templates = $this->getTemplates();
1345                 $formattedtemplates = $sk->formatTemplates( $templates, $this->preview, $this->section != '');
1346
1347                 $hiddencats = $this->mArticle->getHiddenCategories();
1348                 $formattedhiddencats = $sk->formatHiddenCategories( $hiddencats );
1349
1350                 global $wgUseMetadataEdit ;
1351                 if ( $wgUseMetadataEdit ) {
1352                         $metadata = $this->mMetaData ;
1353                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
1354                         $top = wfMsgWikiHtml( 'metadata_help' );
1355                         /* ToDo: Replace with clean code */
1356                         $ew = $wgUser->getOption( 'editwidth' );
1357                         if ( $ew ) $ew = " style=\"width:100%\"";
1358                         else $ew = '';
1359                         $cols = $wgUser->getIntOption( 'cols' );
1360                         /* /ToDo */
1361                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
1362                 }
1363                 else $metadata = "" ;
1364
1365                 $recreate = '';
1366                 if ( $this->wasDeletedSinceLastEdit() ) {
1367                         if ( 'save' != $this->formtype ) {
1368                                 $wgOut->addWikiMsg('deletedwhileediting');
1369                         } else {
1370                                 // Hide the toolbar and edit area, use can click preview to get it back
1371                                 // Add an confirmation checkbox and explanation.
1372                                 $toolbar = '';
1373                                 $recreate = $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ));
1374                                 $recreate .=
1375                                         "<br /><input tabindex='1' type='checkbox' value='1' name='wpRecreate' id='wpRecreate' />".
1376                                         "<label for='wpRecreate' title='".wfMsg('tooltip-recreate')."'>". wfMsg('recreate')."</label>";
1377                         }
1378                 }
1379
1380                 $tabindex = 2;
1381
1382                 $checkboxes = self::getCheckboxes( $tabindex, $sk,
1383                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
1384
1385                 $checkboxhtml = implode( $checkboxes, "\n" );
1386
1387                 $buttons = $this->getEditButtons( $tabindex );
1388                 $buttonshtml = implode( $buttons, "\n" );
1389
1390                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
1391                         ? '' : Xml::hidden( 'safemode', '1' );
1392
1393                 $wgOut->addHTML( <<<END
1394 {$toolbar}
1395 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1396 END
1397 );
1398
1399                 if ( is_callable( $formCallback ) ) {
1400                         call_user_func_array( $formCallback, array( &$wgOut ) );
1401                 }
1402
1403                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1404
1405                 // Put these up at the top to ensure they aren't lost on early form submission
1406                 $this->showFormBeforeText();
1407
1408                 $wgOut->addHTML( <<<END
1409 {$recreate}
1410 {$commentsubject}
1411 {$subjectpreview}
1412 {$this->editFormTextBeforeContent}
1413 END
1414 );
1415                 $this->showTextbox1( $classes );
1416
1417                 $wgOut->wrapWikiMsg( "<div id=\"editpage-copywarn\">\n$1\n</div>", $copywarnMsg );
1418                 $wgOut->addHTML( <<<END
1419 {$this->editFormTextAfterWarn}
1420 {$metadata}
1421 {$editsummary}
1422 {$summarypreview}
1423 {$checkboxhtml}
1424 {$safemodehtml}
1425 END
1426 );
1427
1428                 $wgOut->addHTML(
1429 "<div class='editButtons'>
1430 {$buttonshtml}
1431         <span class='editHelp'>{$cancel} | {$edithelp}</span>
1432 </div><!-- editButtons -->
1433 </div><!-- editOptions -->");
1434
1435                 /**
1436                  * To make it harder for someone to slip a user a page
1437                  * which submits an edit form to the wiki without their
1438                  * knowledge, a random token is associated with the login
1439                  * session. If it's not passed back with the submission,
1440                  * we won't save the page, or render user JavaScript and
1441                  * CSS previews.
1442                  *
1443                  * For anon editors, who may not have a session, we just
1444                  * include the constant suffix to prevent editing from
1445                  * broken text-mangling proxies.
1446                  */
1447                 $token = htmlspecialchars( $wgUser->editToken() );
1448                 $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
1449
1450                 $this->showEditTools();
1451
1452                 $wgOut->addHTML( <<<END
1453 {$this->editFormTextAfterTools}
1454 <div class='templatesUsed'>
1455 {$formattedtemplates}
1456 </div>
1457 <div class='hiddencats'>
1458 {$formattedhiddencats}
1459 </div>
1460 END
1461 );
1462
1463                 if ( $this->isConflict && wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
1464                         $wgOut->wrapWikiMsg( '==$1==', "yourdiff" );
1465
1466                         $de = new DifferenceEngine( $this->mTitle );
1467                         $de->setText( $this->textbox2, $this->textbox1 );
1468                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1469
1470                         $wgOut->wrapWikiMsg( '==$1==', "yourtext" );
1471                         $this->showTextbox2();
1472                 }
1473                 $wgOut->addHTML( $this->editFormTextBottom );
1474                 $wgOut->addHTML( "</form>\n" );
1475                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1476                         $this->displayPreviewArea( $previewOutput, false );
1477                 }
1478
1479                 wfProfileOut( $fname );
1480         }
1481
1482         protected function showFormBeforeText() {
1483                 global $wgOut;
1484                 $wgOut->addHTML( "
1485 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
1486 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
1487 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
1488 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
1489         }
1490
1491         protected function showTextbox1( $classes ) {
1492                 $attribs = array( 'tabindex' => 1 );
1493
1494                 if ( $this->wasDeletedSinceLastEdit() )
1495                         $attribs['type'] = 'hidden';
1496                 if ( !empty($classes) )
1497                         $attribs['class'] = implode(' ',$classes);
1498
1499                 $this->showTextbox( $this->textbox1, 'wpTextbox1', $attribs );
1500         }
1501
1502         protected function showTextbox2() {
1503                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6 ) );
1504         }
1505
1506         protected function showTextbox( $content, $name, $attribs = array() ) {
1507                 global $wgOut, $wgUser;
1508
1509                 $wikitext = $this->safeUnicodeOutput( $content );
1510                 if ( $wikitext !== '' ) {
1511                         // Ensure there's a newline at the end, otherwise adding lines
1512                         // is awkward.
1513                         // But don't add a newline if the ext is empty, or Firefox in XHTML
1514                         // mode will show an extra newline. A bit annoying.
1515                         $wikitext .= "\n";
1516                 }
1517
1518                 $attribs['accesskey'] = ',';
1519                 $attribs['id'] = $name;
1520
1521                 if ( $wgUser->getOption( 'editwidth' ) )
1522                         $attribs['style'] = 'width: 100%';
1523
1524                 $wgOut->addHTML( Xml::textarea(
1525                         $name,
1526                         $wikitext,
1527                         $wgUser->getIntOption( 'cols' ), $wgUser->getIntOption( 'rows' ),
1528                         $attribs ) );
1529         }
1530
1531         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
1532                 global $wgOut;
1533                 $classes = array();
1534                 if ( $isOnTop )
1535                         $classes[] = 'ontop';
1536
1537                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
1538
1539                 if ( $this->formtype != 'preview' )
1540                         $attribs['style'] = 'display: none;';
1541
1542                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
1543
1544                 if ( $this->formtype == 'preview' ) {
1545                         $this->showPreview( $previewOutput );
1546                 }
1547
1548                 $wgOut->addHTML( '</div>' );
1549
1550                 if ( $this->formtype == 'diff') {
1551                         $this->showDiff();
1552                 }
1553         }
1554
1555         /**
1556          * Append preview output to $wgOut.
1557          * Includes category rendering if this is a category page.
1558          *
1559          * @param string $text The HTML to be output for the preview.
1560          */
1561         protected function showPreview( $text ) {
1562                 global $wgOut;
1563                 if ( $this->mTitle->getNamespace() == NS_CATEGORY) {
1564                         $this->mArticle->openShowCategory();
1565                 }
1566                 # This hook seems slightly odd here, but makes things more
1567                 # consistent for extensions.
1568                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
1569                 $wgOut->addHTML( $text );
1570                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
1571                         $this->mArticle->closeShowCategory();
1572                 }
1573         }
1574
1575         /**
1576          * Live Preview lets us fetch rendered preview page content and
1577          * add it to the page without refreshing the whole page.
1578          * If not supported by the browser it will fall through to the normal form
1579          * submission method.
1580          *
1581          * This function outputs a script tag to support live preview, and
1582          * returns an onclick handler which should be added to the attributes
1583          * of the preview button
1584          */
1585         function doLivePreviewScript() {
1586                 global $wgOut, $wgTitle;
1587                 $wgOut->addScriptFile( 'preview.js' );
1588                 $liveAction = $wgTitle->getLocalUrl( "action={$this->action}&wpPreview=true&live=true" );
1589                 return "return !lpDoPreview(" .
1590                         "editform.wpTextbox1.value," .
1591                         '"' . $liveAction . '"' . ")";
1592         }
1593
1594         protected function showEditTools() {
1595                 global $wgOut;
1596                 $wgOut->addHtml( '<div class="mw-editTools">' );
1597                 $wgOut->addWikiMsgArray( 'edittools', array(), array( 'content' ) );
1598                 $wgOut->addHtml( '</div>' );
1599         }
1600
1601         function getLastDelete() {
1602                 $dbr = wfGetDB( DB_SLAVE );
1603                 $data = $dbr->selectRow(
1604                         array( 'logging', 'user' ),
1605                         array( 'log_type',
1606                                'log_action',
1607                                'log_timestamp',
1608                                'log_user',
1609                                'log_namespace',
1610                                'log_title',
1611                                'log_comment',
1612                                'log_params',
1613                                'user_name', ),
1614                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1615                                'log_title' => $this->mTitle->getDBkey(),
1616                                'log_type' => 'delete',
1617                                'log_action' => 'delete',
1618                                'user_id=log_user' ),
1619                         __METHOD__,
1620                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
1621
1622                 return $data;
1623         }
1624
1625         /**
1626          * Get the rendered text for previewing.
1627          * @return string
1628          */
1629         function getPreviewText() {
1630                 global $wgOut, $wgUser, $wgTitle, $wgParser, $wgLang, $wgContLang;
1631
1632                 wfProfileIn( __METHOD__ );
1633
1634                 if ( $this->mTriedSave && !$this->mTokenOk ) {
1635                         if ( $this->mTokenOkExceptSuffix ) {
1636                                 $note = wfMsg( 'token_suffix_mismatch' );
1637                         } else {
1638                                 $note = wfMsg( 'session_fail_preview' );
1639                         }
1640                 } else {
1641                         $note = wfMsg( 'previewnote' );
1642                 }
1643
1644                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1645                 $parserOptions->setEditSection( false );
1646
1647                 global $wgRawHtml;
1648                 if ( $wgRawHtml && !$this->mTokenOk ) {
1649                         // Could be an offsite preview attempt. This is very unsafe if
1650                         // HTML is enabled, as it could be an attack.
1651                         return $wgOut->parse( "<div class='previewnote'>" .
1652                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1653                 }
1654
1655                 # don't parse user css/js, show message about preview
1656                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1657
1658                 if ( $this->isCssJsSubpage ) {
1659                         if (preg_match("/\\.css$/", $this->mTitle->getText() ) ) {
1660                                 $previewtext = wfMsg('usercsspreview');
1661                         } else if (preg_match("/\\.js$/", $this->mTitle->getText() ) ) {
1662                                 $previewtext = wfMsg('userjspreview');
1663                         }
1664                         $parserOptions->setTidy(true);
1665                         $parserOutput = $wgParser->parse( $previewtext, $this->mTitle, $parserOptions );
1666                         $previewHTML = $parserOutput->mText;
1667                 } elseif ( $rt = Title::newFromRedirect( $this->textbox1 ) ) {
1668                         $previewHTML = $this->mArticle->viewRedirect( $rt, false );
1669                 } else {
1670                         $toparse = $this->textbox1;
1671
1672                         # If we're adding a comment, we need to show the
1673                         # summary as the headline
1674                         if ( $this->section=="new" && $this->summary!="" ) {
1675                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1676                         }
1677
1678                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData;
1679
1680                         // Parse mediawiki messages with correct target language
1681                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1682                                 $pos = strrpos( $this->mTitle->getText(), '/' );
1683                                 if ( $pos !== false ) {
1684                                         $code = substr( $this->mTitle->getText(), $pos+1 );
1685                                         switch ($code) {
1686                                                 case $wgLang->getCode():
1687                                                         $obj = $wgLang; break;
1688                                                 case $wgContLang->getCode():
1689                                                         $obj = $wgContLang; break;
1690                                                 default:
1691                                                         $obj = Language::factory( $code );
1692                                         }
1693                                         $parserOptions->setTargetLanguage( $obj );
1694                                 }
1695                         }
1696
1697
1698                         $parserOptions->setTidy(true);
1699                         $parserOptions->enableLimitReport();
1700                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ),
1701                                         $this->mTitle, $parserOptions );
1702
1703                         $previewHTML = $parserOutput->getText();
1704                         $this->mParserOutput = $parserOutput;
1705                         $wgOut->addParserOutputNoText( $parserOutput );
1706
1707                         if ( count( $parserOutput->getWarnings() ) ) {
1708                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
1709                         }
1710                 }
1711
1712                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
1713                         "<div class='previewnote'>" . $wgOut->parse( $note ) . "</div>\n";
1714                 if ( $this->isConflict ) {
1715                         $previewhead .='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1716                 }
1717
1718                 wfProfileOut( __METHOD__ );
1719                 return $previewhead . $previewHTML;
1720         }
1721
1722         function getTemplates() {
1723                 if ( $this->preview || $this->section != '' ) {
1724                         $templates = array();
1725                         if ( !isset($this->mParserOutput) ) return $templates;
1726                         foreach( $this->mParserOutput->getTemplates() as $ns => $template) {
1727                                 foreach( array_keys( $template ) as $dbk ) {
1728                                         $templates[] = Title::makeTitle($ns, $dbk);
1729                                 }
1730                         }
1731                         return $templates;
1732                 } else {
1733                         return $this->mArticle->getUsedTemplates();
1734                 }
1735         }
1736
1737         /**
1738          * Call the stock "user is blocked" page
1739          */
1740         function blockedPage() {
1741                 global $wgOut, $wgUser;
1742                 $wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
1743
1744                 # If the user made changes, preserve them when showing the markup
1745                 # (This happens when a user is blocked during edit, for instance)
1746                 $first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
1747                 if ( $first ) {
1748                         $source = $this->mTitle->exists() ? $this->getContent() : false;
1749                 } else {
1750                         $source = $this->textbox1;
1751                 }
1752
1753                 # Spit out the source or the user's modified version
1754                 if ( $source !== false ) {
1755                         $rows = $wgUser->getIntOption( 'rows' );
1756                         $cols = $wgUser->getIntOption( 'cols' );
1757                         $attribs = array( 'id' => 'wpTextbox1', 'name' => 'wpTextbox1', 'cols' => $cols, 'rows' => $rows, 'readonly' => 'readonly' );
1758                         $wgOut->addHtml( '<hr />' );
1759                         $wgOut->addWikiMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() );
1760                         # Why we don't use Xml::element here?
1761                         # Is it because if $source is '', it returns <textarea />?
1762                         $wgOut->addHtml( Xml::openElement( 'textarea', $attribs ) . htmlspecialchars( $source ) . Xml::closeElement( 'textarea' ) );
1763                 }
1764         }
1765
1766         /**
1767          * Produce the stock "please login to edit pages" page
1768          */
1769         function userNotLoggedInPage() {
1770                 global $wgUser, $wgOut, $wgTitle;
1771                 $skin = $wgUser->getSkin();
1772
1773                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1774                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $wgTitle->getPrefixedUrl() );
1775
1776                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1777                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1778                 $wgOut->setArticleRelated( false );
1779
1780                 $wgOut->addHtml( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
1781                 $wgOut->returnToMain( false, $wgTitle );
1782         }
1783
1784         /**
1785          * Creates a basic error page which informs the user that
1786          * they have attempted to edit a nonexistant section.
1787          */
1788         function noSuchSectionPage() {
1789                 global $wgOut, $wgTitle;
1790
1791                 $wgOut->setPageTitle( wfMsg( 'nosuchsectiontitle' ) );
1792                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1793                 $wgOut->setArticleRelated( false );
1794
1795                 $wgOut->addWikiMsg( 'nosuchsectiontext', $this->section );
1796                 $wgOut->returnToMain( false, $wgTitle );
1797         }
1798
1799         /**
1800          * Produce the stock "your edit contains spam" page
1801          *
1802          * @param $match Text which triggered one or more filters
1803          */
1804         function spamPage( $match = false ) {
1805                 global $wgOut, $wgTitle;
1806
1807                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1808                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1809                 $wgOut->setArticleRelated( false );
1810
1811                 $wgOut->addHtml( '<div id="spamprotected">' );
1812                 $wgOut->addWikiMsg( 'spamprotectiontext' );
1813                 if ( $match )
1814                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
1815                 $wgOut->addHtml( '</div>' );
1816
1817                 $wgOut->returnToMain( false, $wgTitle );
1818         }
1819
1820         /**
1821          * @private
1822          * @todo document
1823          */
1824         function mergeChangesInto( &$editText ){
1825                 $fname = 'EditPage::mergeChangesInto';
1826                 wfProfileIn( $fname );
1827
1828                 $db = wfGetDB( DB_MASTER );
1829
1830                 // This is the revision the editor started from
1831                 $baseRevision = $this->getBaseRevision();
1832                 if ( is_null( $baseRevision ) ) {
1833                         wfProfileOut( $fname );
1834                         return false;
1835                 }
1836                 $baseText = $baseRevision->getText();
1837
1838                 // The current state, we want to merge updates into it
1839                 $currentRevision =  Revision::loadFromTitle(
1840                         $db, $this->mTitle );
1841                 if ( is_null( $currentRevision ) ) {
1842                         wfProfileOut( $fname );
1843                         return false;
1844                 }
1845                 $currentText = $currentRevision->getText();
1846
1847                 $result = '';
1848                 if ( wfMerge( $baseText, $editText, $currentText, $result ) ) {
1849                         $editText = $result;
1850                         wfProfileOut( $fname );
1851                         return true;
1852                 } else {
1853                         wfProfileOut( $fname );
1854                         return false;
1855                 }
1856         }
1857
1858         /**
1859          * Check if the browser is on a blacklist of user-agents known to
1860          * mangle UTF-8 data on form submission. Returns true if Unicode
1861          * should make it through, false if it's known to be a problem.
1862          * @return bool
1863          * @private
1864          */
1865         function checkUnicodeCompliantBrowser() {
1866                 global $wgBrowserBlackList;
1867                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
1868                         // No User-Agent header sent? Trust it by default...
1869                         return true;
1870                 }
1871                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1872                 foreach ( $wgBrowserBlackList as $browser ) {
1873                         if ( preg_match($browser, $currentbrowser) ) {
1874                                 return false;
1875                         }
1876                 }
1877                 return true;
1878         }
1879
1880         /**
1881          * @deprecated use $wgParser->stripSectionName()
1882          */
1883         function pseudoParseSectionAnchor( $text ) {
1884                 global $wgParser;
1885                 return $wgParser->stripSectionName( $text );
1886         }
1887
1888         /**
1889          * Format an anchor fragment as it would appear for a given section name
1890          * @param string $text
1891          * @return string
1892          * @private
1893          */
1894         function sectionAnchor( $text ) {
1895                 global $wgParser;
1896                 return $wgParser->guessSectionNameFromWikiText( $text );
1897         }
1898
1899         /**
1900          * Shows a bulletin board style toolbar for common editing functions.
1901          * It can be disabled in the user preferences.
1902          * The necessary JavaScript code can be found in skins/common/edit.js.
1903          *
1904          * @return string
1905          */
1906         static function getEditToolbar() {
1907                 global $wgStylePath, $wgContLang, $wgLang, $wgJsMimeType;
1908
1909                 /**
1910                  * toolarray an array of arrays which each include the filename of
1911                  * the button image (without path), the opening tag, the closing tag,
1912                  * and optionally a sample text that is inserted between the two when no
1913                  * selection is highlighted.
1914                  * The tip text is shown when the user moves the mouse over the button.
1915                  *
1916                  * Already here are accesskeys (key), which are not used yet until someone
1917                  * can figure out a way to make them work in IE. However, we should make
1918                  * sure these keys are not defined on the edit page.
1919                  */
1920                 $toolarray = array(
1921                         array(
1922                                 'image'  => $wgLang->getImageFile('button-bold'),
1923                                 'id'     => 'mw-editbutton-bold',
1924                                 'open'   => '\'\'\'',
1925                                 'close'  => '\'\'\'',
1926                                 'sample' => wfMsg('bold_sample'),
1927                                 'tip'    => wfMsg('bold_tip'),
1928                                 'key'    => 'B'
1929                         ),
1930                         array(
1931                                 'image'  => $wgLang->getImageFile('button-italic'),
1932                                 'id'     => 'mw-editbutton-italic',
1933                                 'open'   => '\'\'',
1934                                 'close'  => '\'\'',
1935                                 'sample' => wfMsg('italic_sample'),
1936                                 'tip'    => wfMsg('italic_tip'),
1937                                 'key'    => 'I'
1938                         ),
1939                         array(
1940                                 'image'  => $wgLang->getImageFile('button-link'),
1941                                 'id'     => 'mw-editbutton-link',
1942                                 'open'   => '[[',
1943                                 'close'  => ']]',
1944                                 'sample' => wfMsg('link_sample'),
1945                                 'tip'    => wfMsg('link_tip'),
1946                                 'key'    => 'L'
1947                         ),
1948                         array(
1949                                 'image'  => $wgLang->getImageFile('button-extlink'),
1950                                 'id'     => 'mw-editbutton-extlink',
1951                                 'open'   => '[',
1952                                 'close'  => ']',
1953                                 'sample' => wfMsg('extlink_sample'),
1954                                 'tip'    => wfMsg('extlink_tip'),
1955                                 'key'    => 'X'
1956                         ),
1957                         array(
1958                                 'image'  => $wgLang->getImageFile('button-headline'),
1959                                 'id'     => 'mw-editbutton-headline',
1960                                 'open'   => "\n== ",
1961                                 'close'  => " ==\n",
1962                                 'sample' => wfMsg('headline_sample'),
1963                                 'tip'    => wfMsg('headline_tip'),
1964                                 'key'    => 'H'
1965                         ),
1966                         array(
1967                                 'image'  => $wgLang->getImageFile('button-image'),
1968                                 'id'     => 'mw-editbutton-image',
1969                                 'open'   => '[['.$wgContLang->getNsText(NS_IMAGE).':',
1970                                 'close'  => ']]',
1971                                 'sample' => wfMsg('image_sample'),
1972                                 'tip'    => wfMsg('image_tip'),
1973                                 'key'    => 'D'
1974                         ),
1975                         array(
1976                                 'image'  => $wgLang->getImageFile('button-media'),
1977                                 'id'     => 'mw-editbutton-media',
1978                                 'open'   => '[['.$wgContLang->getNsText(NS_MEDIA).':',
1979                                 'close'  => ']]',
1980                                 'sample' => wfMsg('media_sample'),
1981                                 'tip'    => wfMsg('media_tip'),
1982                                 'key'    => 'M'
1983                         ),
1984                         array(
1985                                 'image'  => $wgLang->getImageFile('button-math'),
1986                                 'id'     => 'mw-editbutton-math',
1987                                 'open'   => "<math>",
1988                                 'close'  => "</math>",
1989                                 'sample' => wfMsg('math_sample'),
1990                                 'tip'    => wfMsg('math_tip'),
1991                                 'key'    => 'C'
1992                         ),
1993                         array(
1994                                 'image'  => $wgLang->getImageFile('button-nowiki'),
1995                                 'id'     => 'mw-editbutton-nowiki',
1996                                 'open'   => "<nowiki>",
1997                                 'close'  => "</nowiki>",
1998                                 'sample' => wfMsg('nowiki_sample'),
1999                                 'tip'    => wfMsg('nowiki_tip'),
2000                                 'key'    => 'N'
2001                         ),
2002                         array(
2003                                 'image'  => $wgLang->getImageFile('button-sig'),
2004                                 'id'     => 'mw-editbutton-signature',
2005                                 'open'   => '--~~~~',
2006                                 'close'  => '',
2007                                 'sample' => '',
2008                                 'tip'    => wfMsg('sig_tip'),
2009                                 'key'    => 'Y'
2010                         ),
2011                         array(
2012                                 'image'  => $wgLang->getImageFile('button-hr'),
2013                                 'id'     => 'mw-editbutton-hr',
2014                                 'open'   => "\n----\n",
2015                                 'close'  => '',
2016                                 'sample' => '',
2017                                 'tip'    => wfMsg('hr_tip'),
2018                                 'key'    => 'R'
2019                         )
2020                 );
2021                 $toolbar = "<div id='toolbar'>\n";
2022                 $toolbar.="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
2023
2024                 foreach($toolarray as $tool) {
2025                         $params = array(
2026                                 $image = $wgStylePath.'/common/images/'.$tool['image'],
2027                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
2028                                 // Older browsers show a "speedtip" type message only for ALT.
2029                                 // Ideally these should be different, realistically they
2030                                 // probably don't need to be.
2031                                 $tip = $tool['tip'],
2032                                 $open = $tool['open'],
2033                                 $close = $tool['close'],
2034                                 $sample = $tool['sample'],
2035                                 $cssId = $tool['id'],
2036                         );
2037
2038                         $paramList = implode( ',',
2039                                 array_map( array( 'Xml', 'encodeJsVar' ), $params ) );
2040                         $toolbar.="addButton($paramList);\n";
2041                 }
2042
2043                 $toolbar.="/*]]>*/\n</script>";
2044                 $toolbar.="\n</div>";
2045                 return $toolbar;
2046         }
2047
2048         /**
2049          * Returns an array of html code of the following checkboxes:
2050          * minor and watch
2051          *
2052          * @param $tabindex Current tabindex
2053          * @param $skin Skin object
2054          * @param $checked Array of checkbox => bool, where bool indicates the checked
2055          *                 status of the checkbox
2056          *
2057          * @return array
2058          */
2059         public static function getCheckboxes( &$tabindex, $skin, $checked ) {
2060                 global $wgUser;
2061
2062                 $checkboxes = array();
2063
2064                 $checkboxes['minor'] = '';
2065                 $minorLabel = wfMsgExt('minoredit', array('parseinline'));
2066                 if ( $wgUser->isAllowed('minoredit') ) {
2067                         $attribs = array(
2068                                 'tabindex'  => ++$tabindex,
2069                                 'accesskey' => wfMsg( 'accesskey-minoredit' ),
2070                                 'id'        => 'wpMinoredit',
2071                         );
2072                         $checkboxes['minor'] =
2073                                 Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
2074                                 "&nbsp;<label for='wpMinoredit'".$skin->tooltip('minoredit', 'withaccess').">{$minorLabel}</label>";
2075                 }
2076
2077                 $watchLabel = wfMsgExt('watchthis', array('parseinline'));
2078                 $checkboxes['watch'] = '';
2079                 if ( $wgUser->isLoggedIn() ) {
2080                         $attribs = array(
2081                                 'tabindex'  => ++$tabindex,
2082                                 'accesskey' => wfMsg( 'accesskey-watch' ),
2083                                 'id'        => 'wpWatchthis',
2084                         );
2085                         $checkboxes['watch'] =
2086                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
2087                                 "&nbsp;<label for='wpWatchthis'".$skin->tooltip('watch', 'withaccess').">{$watchLabel}</label>";
2088                 }
2089                 return $checkboxes;
2090         }
2091
2092         /**
2093          * Returns an array of html code of the following buttons:
2094          * save, diff, preview and live
2095          *
2096          * @param $tabindex Current tabindex
2097          *
2098          * @return array
2099          */
2100         public function getEditButtons(&$tabindex) {
2101                 global $wgLivePreview, $wgUser;
2102
2103                 $buttons = array();
2104
2105                 $temp = array(
2106                         'id'        => 'wpSave',
2107                         'name'      => 'wpSave',
2108                         'type'      => 'submit',
2109                         'tabindex'  => ++$tabindex,
2110                         'value'     => wfMsg('savearticle'),
2111                         'accesskey' => wfMsg('accesskey-save'),
2112                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
2113                 );
2114                 $buttons['save'] = Xml::element('input', $temp, '');
2115
2116                 ++$tabindex; // use the same for preview and live preview
2117                 if ( $wgLivePreview && $wgUser->getOption( 'uselivepreview' ) ) {
2118                         $temp = array(
2119                                 'id'        => 'wpPreview',
2120                                 'name'      => 'wpPreview',
2121                                 'type'      => 'submit',
2122                                 'tabindex'  => $tabindex,
2123                                 'value'     => wfMsg('showpreview'),
2124                                 'accesskey' => '',
2125                                 'title'     => wfMsg( 'tooltip-preview' ).' ['.wfMsg( 'accesskey-preview' ).']',
2126                                 'style'     => 'display: none;',
2127                         );
2128                         $buttons['preview'] = Xml::element('input', $temp, '');
2129
2130                         $temp = array(
2131                                 'id'        => 'wpLivePreview',
2132                                 'name'      => 'wpLivePreview',
2133                                 'type'      => 'submit',
2134                                 'tabindex'  => $tabindex,
2135                                 'value'     => wfMsg('showlivepreview'),
2136                                 'accesskey' => wfMsg('accesskey-preview'),
2137                                 'title'     => '',
2138                                 'onclick'   => $this->doLivePreviewScript(),
2139                         );
2140                         $buttons['live'] = Xml::element('input', $temp, '');
2141                 } else {
2142                         $temp = array(
2143                                 'id'        => 'wpPreview',
2144                                 'name'      => 'wpPreview',
2145                                 'type'      => 'submit',
2146                                 'tabindex'  => $tabindex,
2147                                 'value'     => wfMsg('showpreview'),
2148                                 'accesskey' => wfMsg('accesskey-preview'),
2149                                 'title'     => wfMsg( 'tooltip-preview' ).' ['.wfMsg( 'accesskey-preview' ).']',
2150                         );
2151                         $buttons['preview'] = Xml::element('input', $temp, '');
2152                         $buttons['live'] = '';
2153                 }
2154
2155                 $temp = array(
2156                         'id'        => 'wpDiff',
2157                         'name'      => 'wpDiff',
2158                         'type'      => 'submit',
2159                         'tabindex'  => ++$tabindex,
2160                         'value'     => wfMsg('showdiff'),
2161                         'accesskey' => wfMsg('accesskey-diff'),
2162                         'title'     => wfMsg( 'tooltip-diff' ).' ['.wfMsg( 'accesskey-diff' ).']',
2163                 );
2164                 $buttons['diff'] = Xml::element('input', $temp, '');
2165
2166                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons ) );
2167                 return $buttons;
2168         }
2169
2170         /**
2171          * Output preview text only. This can be sucked into the edit page
2172          * via JavaScript, and saves the server time rendering the skin as
2173          * well as theoretically being more robust on the client (doesn't
2174          * disturb the edit box's undo history, won't eat your text on
2175          * failure, etc).
2176          *
2177          * @todo This doesn't include category or interlanguage links.
2178          *       Would need to enhance it a bit, <s>maybe wrap them in XML
2179          *       or something...</s> that might also require more skin
2180          *       initialization, so check whether that's a problem.
2181          */
2182         function livePreview() {
2183                 global $wgOut;
2184                 $wgOut->disable();
2185                 header( 'Content-type: text/xml; charset=utf-8' );
2186                 header( 'Cache-control: no-cache' );
2187
2188                 $previewText = $this->getPreviewText();
2189                 #$categories = $skin->getCategoryLinks();
2190
2191                 $s =
2192                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
2193                 Xml::tags( 'livepreview', null,
2194                         Xml::element( 'preview', null, $previewText )
2195                         #.      Xml::element( 'category', null, $categories )
2196                 );
2197                 echo $s;
2198         }
2199
2200
2201         /**
2202          * Get a diff between the current contents of the edit box and the
2203          * version of the page we're editing from.
2204          *
2205          * If this is a section edit, we'll replace the section as for final
2206          * save and then make a comparison.
2207          */
2208         function showDiff() {
2209                 $oldtext = $this->mArticle->fetchContent();
2210                 $newtext = $this->mArticle->replaceSection(
2211                         $this->section, $this->textbox1, $this->summary, $this->edittime );
2212                 $newtext = $this->mArticle->preSaveTransform( $newtext );
2213                 $oldtitle = wfMsgExt( 'currentrev', array('parseinline') );
2214                 $newtitle = wfMsgExt( 'yourtext', array('parseinline') );
2215                 if ( $oldtext !== false  || $newtext != '' ) {
2216                         $de = new DifferenceEngine( $this->mTitle );
2217                         $de->setText( $oldtext, $newtext );
2218                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2219                         $de->showDiffStyle();
2220                 } else {
2221                         $difftext = '';
2222                 }
2223
2224                 global $wgOut;
2225                 $wgOut->addHtml( '<div id="wikiDiff">' . $difftext . '</div>' );
2226         }
2227
2228         /**
2229          * Filter an input field through a Unicode de-armoring process if it
2230          * came from an old browser with known broken Unicode editing issues.
2231          *
2232          * @param WebRequest $request
2233          * @param string $field
2234          * @return string
2235          * @private
2236          */
2237         function safeUnicodeInput( $request, $field ) {
2238                 $text = rtrim( $request->getText( $field ) );
2239                 return $request->getBool( 'safemode' )
2240                         ? $this->unmakesafe( $text )
2241                         : $text;
2242         }
2243
2244         /**
2245          * Filter an output field through a Unicode armoring process if it is
2246          * going to an old browser with known broken Unicode editing issues.
2247          *
2248          * @param string $text
2249          * @return string
2250          * @private
2251          */
2252         function safeUnicodeOutput( $text ) {
2253                 global $wgContLang;
2254                 $codedText = $wgContLang->recodeForEdit( $text );
2255                 return $this->checkUnicodeCompliantBrowser()
2256                         ? $codedText
2257                         : $this->makesafe( $codedText );
2258         }
2259
2260         /**
2261          * A number of web browsers are known to corrupt non-ASCII characters
2262          * in a UTF-8 text editing environment. To protect against this,
2263          * detected browsers will be served an armored version of the text,
2264          * with non-ASCII chars converted to numeric HTML character references.
2265          *
2266          * Preexisting such character references will have a 0 added to them
2267          * to ensure that round-trips do not alter the original data.
2268          *
2269          * @param string $invalue
2270          * @return string
2271          * @private
2272          */
2273         function makesafe( $invalue ) {
2274                 // Armor existing references for reversability.
2275                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
2276
2277                 $bytesleft = 0;
2278                 $result = "";
2279                 $working = 0;
2280                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2281                         $bytevalue = ord( $invalue{$i} );
2282                         if ( $bytevalue <= 0x7F ) { //0xxx xxxx
2283                                 $result .= chr( $bytevalue );
2284                                 $bytesleft = 0;
2285                         } elseif ( $bytevalue <= 0xBF ) { //10xx xxxx
2286                                 $working = $working << 6;
2287                                 $working += ($bytevalue & 0x3F);
2288                                 $bytesleft--;
2289                                 if ( $bytesleft <= 0 ) {
2290                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
2291                                 }
2292                         } elseif ( $bytevalue <= 0xDF ) { //110x xxxx
2293                                 $working = $bytevalue & 0x1F;
2294                                 $bytesleft = 1;
2295                         } elseif ( $bytevalue <= 0xEF ) { //1110 xxxx
2296                                 $working = $bytevalue & 0x0F;
2297                                 $bytesleft = 2;
2298                         } else { //1111 0xxx
2299                                 $working = $bytevalue & 0x07;
2300                                 $bytesleft = 3;
2301                         }
2302                 }
2303                 return $result;
2304         }
2305
2306         /**
2307          * Reverse the previously applied transliteration of non-ASCII characters
2308          * back to UTF-8. Used to protect data from corruption by broken web browsers
2309          * as listed in $wgBrowserBlackList.
2310          *
2311          * @param string $invalue
2312          * @return string
2313          * @private
2314          */
2315         function unmakesafe( $invalue ) {
2316                 $result = "";
2317                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2318                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
2319                                 $i += 3;
2320                                 $hexstring = "";
2321                                 do {
2322                                         $hexstring .= $invalue{$i};
2323                                         $i++;
2324                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
2325
2326                                 // Do some sanity checks. These aren't needed for reversability,
2327                                 // but should help keep the breakage down if the editor
2328                                 // breaks one of the entities whilst editing.
2329                                 if ( (substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6) ) {
2330                                         $codepoint = hexdec($hexstring);
2331                                         $result .= codepointToUtf8( $codepoint );
2332                                 } else {
2333                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
2334                                 }
2335                         } else {
2336                                 $result .= substr( $invalue, $i, 1 );
2337                         }
2338                 }
2339                 // reverse the transform that we made for reversability reasons.
2340                 return strtr( $result, array( "&#x0" => "&#x" ) );
2341         }
2342
2343         function noCreatePermission() {
2344                 global $wgOut;
2345                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
2346                 $wgOut->addWikiMsg( 'nocreatetext' );
2347         }
2348
2349         /**
2350          * If there are rows in the deletion log for this page, show them,
2351          * along with a nice little note for the user
2352          *
2353          * @param OutputPage $out
2354          */
2355         protected function showDeletionLog( $out ) {
2356                 global $wgUser;
2357                 $loglist = new LogEventsList( $wgUser->getSkin(), $out );
2358                 $pager = new LogPager( $loglist, 'delete', false, $this->mTitle->getPrefixedText() );
2359                 $count = $pager->getNumRows();
2360                 if ( $count > 0 ) {
2361                         $pager->mLimit = 10;
2362                         $out->addHtml( '<div class="mw-warning-with-logexcerpt">' );
2363                         $out->addWikiMsg( 'recreate-deleted-warn' );
2364                         $out->addHTML(
2365                                 $loglist->beginLogEventsList() .
2366                                 $pager->getBody() .
2367                                 $loglist->endLogEventsList()
2368                         );
2369                         if($count > 10){
2370                                 $out->addHtml( $wgUser->getSkin()->link(
2371                                         SpecialPage::getTitleFor( 'Log' ),
2372                                         wfMsgHtml( 'deletelog-fulllog' ),
2373                                         array(),
2374                                         array(
2375                                                 'type' => 'delete',
2376                                                 'page' => $this->mTitle->getPrefixedText() ) ) );
2377                         }
2378                         $out->addHtml( '</div>' );
2379                         return true;
2380                 }
2381
2382                 return false;
2383         }
2384
2385         /**
2386          * Attempt submission
2387          * @return bool false if output is done, true if the rest of the form should be displayed
2388          */
2389         function attemptSave() {
2390                 global $wgUser, $wgOut, $wgTitle, $wgRequest;
2391
2392                 $resultDetails = false;
2393                 $value = $this->internalAttemptSave( $resultDetails, $wgUser->isAllowed('bot') && $wgRequest->getBool('bot', true) );
2394
2395                 if ( $value == self::AS_SUCCESS_UPDATE || $value == self::AS_SUCCESS_NEW_ARTICLE ) {
2396                         $this->didSave = true;
2397                 }
2398
2399                 switch ($value) {
2400                         case self::AS_HOOK_ERROR_EXPECTED:
2401                         case self::AS_CONTENT_TOO_BIG:
2402                         case self::AS_ARTICLE_WAS_DELETED:
2403                         case self::AS_CONFLICT_DETECTED:
2404                         case self::AS_SUMMARY_NEEDED:
2405                         case self::AS_TEXTBOX_EMPTY:
2406                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
2407                         case self::AS_END:
2408                                 return true;
2409
2410                         case self::AS_HOOK_ERROR:
2411                         case self::AS_FILTERING:
2412                         case self::AS_SUCCESS_NEW_ARTICLE:
2413                         case self::AS_SUCCESS_UPDATE:
2414                                 return false;
2415
2416                         case self::AS_SPAM_ERROR:
2417                                 $this->spamPage ( $resultDetails['spam'] );
2418                                 return false;
2419
2420                         case self::AS_BLOCKED_PAGE_FOR_USER:
2421                                 $this->blockedPage();
2422                                 return false;
2423
2424                         case self::AS_IMAGE_REDIRECT_ANON:
2425                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
2426                                 return false;
2427
2428                         case self::AS_READ_ONLY_PAGE_ANON:
2429                                 $this->userNotLoggedInPage();
2430                                 return false;
2431
2432                         case self::AS_READ_ONLY_PAGE_LOGGED:
2433                         case self::AS_READ_ONLY_PAGE:
2434                                 $wgOut->readOnlyPage();
2435                                 return false;
2436
2437                         case self::AS_RATE_LIMITED:
2438                                 $wgOut->rateLimited();
2439                                 return false;
2440
2441                         case self::AS_NO_CREATE_PERMISSION;
2442                                 $this->noCreatePermission();
2443                                 return;
2444
2445                         case self::AS_BLANK_ARTICLE:
2446                                 $wgOut->redirect( $wgTitle->getFullURL() );
2447                                 return false;
2448
2449                         case self::AS_IMAGE_REDIRECT_LOGGED:
2450                                 $wgOut->permissionRequired( 'upload' );
2451                                 return false;
2452                 }
2453         }
2454
2455         function getBaseRevision() {
2456                 if ( $this->mBaseRevision == false ) {
2457                         $db = wfGetDB( DB_MASTER );
2458                         $baseRevision = Revision::loadFromTimestamp(
2459                                 $db, $this->mTitle, $this->edittime );
2460                         return $this->mBaseRevision = $baseRevision;
2461                 } else {
2462                         return $this->mBaseRevision;
2463                 }
2464         }
2465 }