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         public $undidRev = 0;
  88
  89         public $suppressIntro = false;
  90
  91         /**
  92          * @todo document
  93          * @param $article
  94          */
  95         function EditPage( $article ) {
  96                 $this->mArticle =& $article;
  97                 $this->mTitle = $article->getTitle();
  98                 $this->action = 'submit';
  99
 100                 # Placeholders for text injection by hooks (empty per default)
 101                 $this->editFormPageTop =
 102                 $this->editFormTextTop =
 103                 $this->editFormTextBeforeContent =
 104                 $this->editFormTextAfterWarn =
 105                 $this->editFormTextAfterTools =
 106                 $this->editFormTextBottom = "";
 107         }
 108
 109         function getArticle() {
 110                 return $this->mArticle;
 111         }
 112
 113         /**
 114          * Fetch initial editing page content.
 115          * @private
 116          */
 117         function getContent( $def_text = '' ) {
 118                 global $wgOut, $wgRequest, $wgParser, $wgContLang, $wgMessageCache;
 119
 120                 wfProfileIn( __METHOD__ );
 121                 # Get variables from query string :P
 122                 $section = $wgRequest->getVal( 'section' );
 123                 $preload = $wgRequest->getVal( 'preload' );
 124                 $undoafter = $wgRequest->getVal( 'undoafter' );
 125                 $undo = $wgRequest->getVal( 'undo' );
 126
 127                 $text = '';
 128                 // For message page not locally set, use the i18n message.
 129                 // For other non-existent articles, use preload text if any.
 130                 if ( !$this->mTitle->exists() ) {
 131                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 132                                 # If this is a system message, get the default text.
 133                                 list( $message, $lang ) = $wgMessageCache->figureMessage( $wgContLang->lcfirst( $this->mTitle->getText() ) );
 134                                 $wgMessageCache->loadAllMessages( $lang );
 135                                 $text = wfMsgGetKey( $message, false, $lang, false );
 136                                 if( wfEmptyMsg( $message, $text ) )
 137                                         $text = '';
 138                         } else {
 139                                 # If requested, preload some text.
 140                                 $text = $this->getPreloadedText( $preload );
 141                         }
 142                 // For existing pages, get text based on "undo" or section parameters.
 143                 } else {
 144                         $text = $this->mArticle->getContent();
 145                         if ( $undo > 0 && $undoafter > 0 && $undo < $undoafter ) {
 146                                 # If they got undoafter and undo round the wrong way, switch them
 147                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 148                         }
 149                         if ( $undo > 0 && $undo > $undoafter ) {
 150                                 # Undoing a specific edit overrides section editing; section-editing
 151                                 # doesn't work with undoing.
 152                                 if ( $undoafter ) {
 153                                         $undorev = Revision::newFromId($undo);
 154                                         $oldrev = Revision::newFromId($undoafter);
 155                                 } else {
 156                                         $undorev = Revision::newFromId($undo);
 157                                         $oldrev = $undorev ? $undorev->getPrevious() : null;
 158                                 }
 159
 160                                 # Sanity check, make sure it's the right page,
 161                                 # the revisions exist and they were not deleted.
 162                                 # Otherwise, $text will be left as-is.
 163                                 if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 164                                         $undorev->getPage() == $oldrev->getPage() &&
 165                                         $undorev->getPage() == $this->mArticle->getID() &&
 166                                         !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 167                                         !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 168                                         $undorev_text = $undorev->getText();
 169                                         $oldrev_text = $oldrev->getText();
 170                                         $currev_text = $text;
 171
 172                                         if ( $currev_text != $undorev_text ) {
 173                                                 $result = wfMerge( $undorev_text, $oldrev_text, $currev_text, $text );
 174                                         } else {
 175                                                 # No use doing a merge if it's just a straight revert.
 176                                                 $text = $oldrev_text;
 177                                                 $result = true;
 178                                         }
 179                                         if ( $result ) {
 180                                                 # Inform the user of our success and set an automatic edit summary
 181                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="mw-undo-success">' . wfMsgNoTrans( 'undo-success' ) . '</div>' );
 182                                                 $firstrev = $oldrev->getNext();
 183                                                 # If we just undid one rev, use an autosummary
 184                                                 if ( $firstrev->mId == $undo ) {
 185                                                         $this->summary = wfMsgForContent( 'undo-summary', $undo, $undorev->getUserText() );
 186                                                         $this->undidRev = $undo;
 187                                                 }
 188                                                 $this->formtype = 'diff';
 189                                         } else {
 190                                                 # Warn the user that something went wrong
 191                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-failure">' . wfMsgNoTrans( 'undo-failure' ) . '</div>' );
 192                                         }
 193                                 } else {
 194                                         // Failed basic sanity checks.
 195                                         // Older revisions may have been removed since the link
 196                                         // was created, or we may simply have got bogus input.
 197                                         $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-norev">' . wfMsgNoTrans( 'undo-norev' ) . '</div>' );
 198                                 }
 199                         } else if ( $section != '' ) {
 200                                 if ( $section == 'new' ) {
 201                                         $text = $this->getPreloadedText( $preload );
 202                                 } else {
 203                                         $text = $wgParser->getSection( $text, $section, $def_text );
 204                                 }
 205                         }
 206                 }
 207
 208                 wfProfileOut( __METHOD__ );
 209                 return $text;
 210         }
 211
 212         /**
 213          * Get the contents of a page from its title and remove includeonly tags
 214          *
 215          * @param $preload String: the title of the page.
 216          * @return string The contents of the page.
 217          */
 218         protected function getPreloadedText( $preload ) {
 219                 if ( $preload === '' ) {
 220                         return '';
 221                 } else {
 222                         $preloadTitle = Title::newFromText( $preload );
 223                         if ( isset( $preloadTitle ) && $preloadTitle->userCanRead() ) {
 224                                 $rev = Revision::newFromTitle($preloadTitle);
 225                                 if ( is_object( $rev ) ) {
 226                                         $text = $rev->getText();
 227                                         // TODO FIXME: AAAAAAAAAAA, this shouldn't be implementing
 228                                         // its own mini-parser! -ævar
 229                                         $text = preg_replace( '~</?includeonly>~', '', $text );
 230                                         return $text;
 231                                 } else
 232                                         return '';
 233                         }
 234                 }
 235         }
 236
 237         /**
 238          * This is the function that extracts metadata from the article body on the first view.
 239          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
 240          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
 241          */
 242         function extractMetaDataFromArticle () {
 243                 global $wgUseMetadataEdit, $wgMetadataWhitelist, $wgContLang;
 244                 $this->mMetaData = '';
 245                 if ( !$wgUseMetadataEdit ) return;
 246                 if ( $wgMetadataWhitelist == '' ) return;
 247                 $s = '';
 248                 $t = $this->getContent();
 249
 250                 # MISSING : <nowiki> filtering
 251
 252                 # Categories and language links
 253                 $t = explode ( "\n" , $t );
 254                 $catlow = strtolower ( $wgContLang->getNsText( NS_CATEGORY ) );
 255                 $cat = $ll = array();
 256                 foreach ( $t AS $key => $x ) {
 257                         $y = trim ( strtolower ( $x ) );
 258                         while ( substr ( $y , 0 , 2 ) == '[[' ) {
 259                                 $y = explode ( ']]' , trim ( $x ) );
 260                                 $first = array_shift ( $y );
 261                                 $first = explode ( ':' , $first );
 262                                 $ns = array_shift ( $first );
 263                                 $ns = trim ( str_replace ( '[' , '' , $ns ) );
 264                                 if ( $wgContLang->getLanguageName( $ns ) || strtolower ( $ns ) == $catlow ) {
 265                                         $add = '[[' . $ns . ':' . implode ( ':' , $first ) . ']]';
 266                                         if ( strtolower ( $ns ) == $catlow ) $cat[] = $add;
 267                                         else $ll[] = $add;
 268                                         $x = implode ( ']]' , $y );
 269                                         $t[$key] = $x;
 270                                         $y = trim ( strtolower ( $x ) );
 271                                 } else {
 272                                         $x = implode ( ']]' , $y );
 273                                         $y = trim ( strtolower ( $x ) );
 274                                 }
 275                         }
 276                 }
 277                 if ( count ( $cat ) ) $s .= implode ( ' ' , $cat ) . "\n";
 278                 if ( count ( $ll ) ) $s .= implode ( ' ' , $ll ) . "\n";
 279                 $t = implode ( "\n" , $t );
 280
 281                 # Load whitelist
 282                 $sat = array () ; # stand-alone-templates; must be lowercase
 283                 $wl_title = Title::newFromText ( $wgMetadataWhitelist );
 284                 $wl_article = new Article ( $wl_title );
 285                 $wl = explode ( "\n" , $wl_article->getContent() );
 286                 foreach ( $wl AS $x ) {
 287                         $isentry = false;
 288                         $x = trim ( $x );
 289                         while ( substr ( $x , 0 , 1 ) == '*' ) {
 290                                 $isentry = true;
 291                                 $x = trim ( substr ( $x , 1 ) );
 292                         }
 293                         if ( $isentry ) {
 294                                 $sat[] = strtolower ( $x );
 295                         }
 296
 297                 }
 298
 299                 # Templates, but only some
 300                 $t = explode ( '{{' , $t );
 301                 $tl = array () ;
 302                 foreach ( $t AS $key => $x ) {
 303                         $y = explode ( '}}' , $x , 2 );
 304                         if ( count ( $y ) == 2 ) {
 305                                 $z = $y[0];
 306                                 $z = explode ( '|' , $z );
 307                                 $tn = array_shift ( $z );
 308                                 if ( in_array ( strtolower ( $tn ) , $sat ) ) {
 309                                         $tl[] = '{{' . $y[0] . '}}';
 310                                         $t[$key] = $y[1];
 311                                         $y = explode ( '}}' , $y[1] , 2 );
 312                                 }
 313                                 else $t[$key] = '{{' . $x;
 314                         }
 315                         else if ( $key != 0 ) $t[$key] = '{{' . $x;
 316                         else $t[$key] = $x;
 317                 }
 318                 if ( count ( $tl ) ) $s .= implode ( ' ' , $tl );
 319                 $t = implode ( '' , $t );
 320
 321                 $t = str_replace ( "\n\n\n" , "\n" , $t );
 322                 $this->mArticle->mContent = $t;
 323                 $this->mMetaData = $s;
 324         }
 325
 326         /*
 327          * Check if a page was deleted while the user was editing it, before submit.
 328          * Note that we rely on the logging table, which hasn't been always there,
 329          * but that doesn't matter, because this only applies to brand new
 330          * deletes.
 331          */
 332         protected function wasDeletedSinceLastEdit() {
 333                 if ( $this->deletedSinceEdit )
 334                         return true;
 335                 if ( $this->mTitle->isDeleted() ) {
 336                         $this->lastDelete = $this->getLastDelete();
 337                         if ( $this->lastDelete ) {
 338                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
 339                                 if ( $deleteTime > $this->starttime ) {
 340                                         $this->deletedSinceEdit = true;
 341                                 }
 342                         }
 343                 }
 344                 return $this->deletedSinceEdit;
 345         }
 346
 347         function submit() {
 348                 $this->edit();
 349         }
 350
 351         /**
 352          * This is the function that gets called for "action=edit". It
 353          * sets up various member variables, then passes execution to
 354          * another function, usually showEditForm()
 355          *
 356          * The edit form is self-submitting, so that when things like
 357          * preview and edit conflicts occur, we get the same form back
 358          * with the extra stuff added.  Only when the final submission
 359          * is made and all is well do we actually save and redirect to
 360          * the newly-edited page.
 361          */
 362         function edit() {
 363                 global $wgOut, $wgUser, $wgRequest;
 364                 // Allow extensions to modify/prevent this form or submission
 365                 if ( !wfRunHooks( 'AlternateEdit', array( &$this ) ) ) {
 366                         return;
 367                 }
 368
 369                 wfProfileIn( __METHOD__ );
 370                 wfDebug( __METHOD__.": enter\n" );
 371
 372                 // This is not an article
 373                 $wgOut->setArticleFlag( false );
 374
 375                 $this->importFormData( $wgRequest );
 376                 $this->firsttime = false;
 377
 378                 if ( $this->live ) {
 379                         $this->livePreview();
 380                         wfProfileOut( __METHOD__ );
 381                         return;
 382                 }
 383
 384                 if ( wfReadOnly() && $this->save ) {
 385                                 // Force preview
 386                                 $this->save = false;
 387                                 $this->preview = true;
 388                 }
 389
 390                 $wgOut->addScriptFile( 'edit.js' );
 391                 $permErrors = $this->getEditPermissionErrors();
 392                 if ( $permErrors ) {
 393                         wfDebug( __METHOD__.": User can't edit\n" );
 394                         $this->readOnlyPage( $this->getContent(), true, $permErrors, 'edit' );
 395                         wfProfileOut( __METHOD__ );
 396                         return;
 397                 } else {
 398                         if ( $this->save ) {
 399                                 $this->formtype = 'save';
 400                         } else if ( $this->preview ) {
 401                                 $this->formtype = 'preview';
 402                         } else if ( $this->diff ) {
 403                                 $this->formtype = 'diff';
 404                         } else { # First time through
 405                                 $this->firsttime = true;
 406                                 if ( $this->previewOnOpen() ) {
 407                                         $this->formtype = 'preview';
 408                                 } else {
 409                                         $this->extractMetaDataFromArticle () ;
 410                                         $this->formtype = 'initial';
 411                                 }
 412                         }
 413                 }
 414
 415                 wfProfileIn( __METHOD__."-business-end" );
 416
 417                 $this->isConflict = false;
 418                 // css / js subpages of user pages get a special treatment
 419                 $this->isCssJsSubpage      = $this->mTitle->isCssJsSubpage();
 420                 $this->isValidCssJsSubpage = $this->mTitle->isValidCssJsSubpage();
 421
 422                 # Show applicable editing introductions
 423                 if ( $this->formtype == 'initial' || $this->firsttime )
 424                         $this->showIntro();
 425
 426                 if ( $this->mTitle->isTalkPage() ) {
 427                         $wgOut->addWikiMsg( 'talkpagetext' );
 428                 }
 429
 430                 # Optional notices on a per-namespace and per-page basis
 431                 $editnotice_ns   = 'editnotice-'.$this->mTitle->getNamespace();
 432                 $editnotice_page = $editnotice_ns.'-'.$this->mTitle->getDBkey();
 433                 if ( !wfEmptyMsg( $editnotice_ns, wfMsgForContent( $editnotice_ns ) ) ) {
 434                         $wgOut->addWikiText( wfMsgForContent( $editnotice_ns )  );
 435                 }
 436                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
 437                         $parts = explode( '/', $this->mTitle->getDBkey() );
 438                         $editnotice_base = $editnotice_ns;
 439                         while ( count( $parts ) > 0 ) {
 440                                 $editnotice_base .= '-'.array_shift( $parts );
 441                                 if ( !wfEmptyMsg( $editnotice_base, wfMsgForContent( $editnotice_base ) ) ) {
 442                                         $wgOut->addWikiText( wfMsgForContent( $editnotice_base )  );
 443                                 }
 444                         }
 445                 } else if ( !wfEmptyMsg( $editnotice_page, wfMsgForContent( $editnotice_page ) ) ) {
 446                         $wgOut->addWikiText( wfMsgForContent( $editnotice_page ) );
 447                 }
 448
 449                 # Attempt submission here.  This will check for edit conflicts,
 450                 # and redundantly check for locked database, blocked IPs, etc.
 451                 # that edit() already checked just in case someone tries to sneak
 452                 # in the back door with a hand-edited submission URL.
 453
 454                 if ( 'save' == $this->formtype ) {
 455                         if ( !$this->attemptSave() ) {
 456                                 wfProfileOut( __METHOD__."-business-end" );
 457                                 wfProfileOut( __METHOD__ );
 458                                 return;
 459                         }
 460                 }
 461
 462                 # First time through: get contents, set time for conflict
 463                 # checking, etc.
 464                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 465                         if ( $this->initialiseForm() === false) {
 466                                 $this->noSuchSectionPage();
 467                                 wfProfileOut( __METHOD__."-business-end" );
 468                                 wfProfileOut( __METHOD__ );
 469                                 return;
 470                         }
 471                         if ( !$this->mTitle->getArticleId() )
 472                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 473                 }
 474
 475                 $this->showEditForm();
 476                 wfProfileOut( __METHOD__."-business-end" );
 477                 wfProfileOut( __METHOD__ );
 478         }
 479
 480         protected function getEditPermissionErrors() {
 481                 global $wgUser;
 482                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 483                 # Can this title be created?
 484                 if ( !$this->mTitle->exists() ) {
 485                         $permErrors = array_merge( $permErrors,
 486                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 487                 }
 488                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 489                 $remove = array();
 490                 foreach( $permErrors as $error ) {
 491                         if ( ($this->preview || $this->diff) &&
 492                                 ($error[0] == 'blockedtext' || $error[0] == 'autoblockedtext') )
 493                         {
 494                                 $remove[] = $error;
 495                         }
 496                 }
 497                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 498                 return $permErrors;
 499         }
 500
 501         /**
 502          * Show a read-only error
 503          * Parameters are the same as OutputPage:readOnlyPage()
 504          * Redirect to the article page if redlink=1
 505          */
 506         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 507                 global $wgRequest, $wgOut;
 508                 if ( $wgRequest->getBool( 'redlink' ) ) {
 509                         // The edit page was reached via a red link.
 510                         // Redirect to the article page and let them click the edit tab if
 511                         // they really want a permission error.
 512                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 513                 } else {
 514                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 515                 }
 516         }
 517
 518         /**
 519          * Should we show a preview when the edit form is first shown?
 520          *
 521          * @return bool
 522          */
 523         protected function previewOnOpen() {
 524                 global $wgRequest, $wgUser;
 525                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 526                         // Explicit override from request
 527                         return true;
 528                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 529                         // Explicit override from request
 530                         return false;
 531                 } elseif ( $this->section == 'new' ) {
 532                         // Nothing *to* preview for new sections
 533                         return false;
 534                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== '' || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 535                         // Standard preference behaviour
 536                         return true;
 537                 } elseif ( !$this->mTitle->exists() && $this->mTitle->getNamespace() == NS_CATEGORY ) {
 538                         // Categories are special
 539                         return true;
 540                 } else {
 541                         return false;
 542                 }
 543         }
 544
 545         /**
 546          * @todo document
 547          * @param $request
 548          */
 549         function importFormData( &$request ) {
 550                 global $wgLang, $wgUser;
 551                 $fname = 'EditPage::importFormData';
 552                 wfProfileIn( $fname );
 553
 554                 # Section edit can come from either the form or a link
 555                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 556
 557                 if ( $request->wasPosted() ) {
 558                         # These fields need to be checked for encoding.
 559                         # Also remove trailing whitespace, but don't remove _initial_
 560                         # whitespace from the text boxes. This may be significant formatting.
 561                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 562                         $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
 563                         $this->mMetaData = rtrim( $request->getText( 'metadata' ) );
 564                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 565                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary' ), 250 );
 566
 567                         # Remove extra headings from summaries and new sections.
 568                         $this->summary = preg_replace('/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary);
 569
 570                         $this->edittime = $request->getVal( 'wpEdittime' );
 571                         $this->starttime = $request->getVal( 'wpStarttime' );
 572
 573                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 574
 575                         if ( is_null( $this->edittime ) ) {
 576                                 # If the form is incomplete, force to preview.
 577                                 wfDebug( "$fname: Form data appears to be incomplete\n" );
 578                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 579                                 $this->preview = true;
 580                         } else {
 581                                 /* Fallback for live preview */
 582                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 583                                 $this->diff = $request->getCheck( 'wpDiff' );
 584
 585                                 // Remember whether a save was requested, so we can indicate
 586                                 // if we forced preview due to session failure.
 587                                 $this->mTriedSave = !$this->preview;
 588
 589                                 if ( $this->tokenOk( $request ) ) {
 590                                         # Some browsers will not report any submit button
 591                                         # if the user hits enter in the comment box.
 592                                         # The unmarked state will be assumed to be a save,
 593                                         # if the form seems otherwise complete.
 594                                         wfDebug( "$fname: Passed token check.\n" );
 595                                 } else if ( $this->diff ) {
 596                                         # Failed token check, but only requested "Show Changes".
 597                                         wfDebug( "$fname: Failed token check; Show Changes requested.\n" );
 598                                 } else {
 599                                         # Page might be a hack attempt posted from
 600                                         # an external site. Preview instead of saving.
 601                                         wfDebug( "$fname: Failed token check; forcing preview\n" );
 602                                         $this->preview = true;
 603                                 }
 604                         }
 605                         $this->save = !$this->preview && !$this->diff;
 606                         if ( !preg_match( '/^\d{14}$/', $this->edittime )) {
 607                                 $this->edittime = null;
 608                         }
 609
 610                         if ( !preg_match( '/^\d{14}$/', $this->starttime )) {
 611                                 $this->starttime = null;
 612                         }
 613
 614                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 615
 616                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 617                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 618
 619                         # Don't force edit summaries when a user is editing their own user or talk page
 620                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 621                                 $this->mTitle->getText() == $wgUser->getName() )
 622                         {
 623                                 $this->allowBlankSummary = true;
 624                         } else {
 625                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary');
 626                         }
 627
 628                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 629                 } else {
 630                         # Not a posted form? Start with nothing.
 631                         wfDebug( "$fname: Not a posted form.\n" );
 632                         $this->textbox1  = '';
 633                         $this->textbox2  = '';
 634                         $this->mMetaData = '';
 635                         $this->summary   = '';
 636                         $this->edittime  = '';
 637                         $this->starttime = wfTimestampNow();
 638                         $this->edit      = false;
 639                         $this->preview   = false;
 640                         $this->save      = false;
 641                         $this->diff      = false;
 642                         $this->minoredit = false;
 643                         $this->watchthis = false;
 644                         $this->recreate  = false;
 645
 646                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 647                                 $this->summary = $request->getVal( 'preloadtitle' );
 648                         }
 649                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 650                                 $this->summary = $request->getText( 'summary' );
 651                         }
 652
 653                         if ( $request->getVal( 'minor' ) ) {
 654                                 $this->minoredit = true;
 655                         }
 656                 }
 657
 658                 $this->oldid = $request->getInt( 'oldid' );
 659
 660                 $this->live = $request->getCheck( 'live' );
 661                 $this->editintro = $request->getText( 'editintro' );
 662
 663                 wfProfileOut( $fname );
 664         }
 665
 666         /**
 667          * Make sure the form isn't faking a user's credentials.
 668          *
 669          * @param $request WebRequest
 670          * @return bool
 671          * @private
 672          */
 673         function tokenOk( &$request ) {
 674                 global $wgUser;
 675                 $token = $request->getVal( 'wpEditToken' );
 676                 $this->mTokenOk = $wgUser->matchEditToken( $token );
 677                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
 678                 return $this->mTokenOk;
 679         }
 680
 681         /**
 682          * Show all applicable editing introductions
 683          */
 684         protected function showIntro() {
 685                 global $wgOut, $wgUser;
 686                 if ( $this->suppressIntro ) {
 687                         return;
 688                 }
 689                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exists
 690                 if ( $this->mTitle->getNamespace() == NS_USER || $this->mTitle->getNamespace() == NS_USER_TALK ) {
 691                         $parts = explode( '/', $this->mTitle->getText(), 2 );
 692                         $username = $parts[0];
 693                         $id = User::idFromName( $username );
 694                         $ip = User::isIP( $username );
 695                         if ( $id == 0 && !$ip ) {
 696                                 $wgOut->wrapWikiMsg( '<div class="mw-userpage-userdoesnotexist error">$1</div>',
 697                                         array( 'userpage-userdoesnotexist', $username ) );
 698                         }
 699                 }
 700                 # Try to add a custom edit intro, or use the standard one if this is not possible.
 701                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
 702                         if ( $wgUser->isLoggedIn() ) {
 703                                 $wgOut->wrapWikiMsg( '<div class="mw-newarticletext">$1</div>', 'newarticletext' );
 704                         } else {
 705                                 $wgOut->wrapWikiMsg( '<div class="mw-newarticletextanon">$1</div>', 'newarticletextanon' );
 706                         }
 707                 }
 708                 # Give a notice if the user is editing a deleted page...
 709                 if ( !$this->mTitle->exists() ) {
 710                         $this->showDeletionLog( $wgOut );
 711                 }
 712         }
 713
 714         /**
 715          * Attempt to show a custom editing introduction, if supplied
 716          *
 717          * @return bool
 718          */
 719         protected function showCustomIntro() {
 720                 if ( $this->editintro ) {
 721                         $title = Title::newFromText( $this->editintro );
 722                         if ( $title instanceof Title && $title->exists() && $title->userCanRead() ) {
 723                                 global $wgOut;
 724                                 $revision = Revision::newFromTitle( $title );
 725                                 $wgOut->addWikiTextTitleTidy( $revision->getText(), $this->mTitle );
 726                                 return true;
 727                         } else {
 728                                 return false;
 729                         }
 730                 } else {
 731                         return false;
 732                 }
 733         }
 734
 735         /**
 736          * Attempt submission (no UI)
 737          * @return one of the constants describing the result
 738          */
 739         function internalAttemptSave( &$result, $bot = false ) {
 740                 global $wgFilterCallback, $wgUser, $wgOut, $wgParser;
 741                 global $wgMaxArticleSize;
 742
 743                 $fname = 'EditPage::attemptSave';
 744                 wfProfileIn( $fname );
 745                 wfProfileIn( "$fname-checks" );
 746
 747                 if ( !wfRunHooks( 'EditPage::attemptSave', array( &$this ) ) )
 748                 {
 749                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
 750                         return self::AS_HOOK_ERROR;
 751                 }
 752
 753                 # Check image redirect
 754                 if ( $this->mTitle->getNamespace() == NS_FILE &&
 755                         Title::newFromRedirect( $this->textbox1 ) instanceof Title &&
 756                         !$wgUser->isAllowed( 'upload' ) ) {
 757                                 if ( $wgUser->isAnon() ) {
 758                                         return self::AS_IMAGE_REDIRECT_ANON;
 759                                 } else {
 760                                         return self::AS_IMAGE_REDIRECT_LOGGED;
 761                                 }
 762                 }
 763
 764                 # Reintegrate metadata
 765                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 766                 $this->mMetaData = '' ;
 767
 768                 # Check for spam
 769                 $match = self::matchSpamRegex( $this->summary );
 770                 if ( $match === false ) {
 771                         $match = self::matchSpamRegex( $this->textbox1 );
 772                 }
 773                 if ( $match !== false ) {
 774                         $result['spam'] = $match;
 775                         $ip = wfGetIP();
 776                         $pdbk = $this->mTitle->getPrefixedDBkey();
 777                         $match = str_replace( "\n", '', $match );
 778                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
 779                         wfProfileOut( "$fname-checks" );
 780                         wfProfileOut( $fname );
 781                         return self::AS_SPAM_ERROR;
 782                 }
 783                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
 784                         # Error messages or other handling should be performed by the filter function
 785                         wfProfileOut( "$fname-checks" );
 786                         wfProfileOut( $fname );
 787                         return self::AS_FILTERING;
 788                 }
 789                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
 790                         # Error messages etc. could be handled within the hook...
 791                         wfProfileOut( "$fname-checks" );
 792                         wfProfileOut( $fname );
 793                         return self::AS_HOOK_ERROR;
 794                 } elseif ( $this->hookError != '' ) {
 795                         # ...or the hook could be expecting us to produce an error
 796                         wfProfileOut( "$fname-checks" );
 797                         wfProfileOut( $fname );
 798                         return self::AS_HOOK_ERROR_EXPECTED;
 799                 }
 800                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 801                         # Check block state against master, thus 'false'.
 802                         wfProfileOut( "$fname-checks" );
 803                         wfProfileOut( $fname );
 804                         return self::AS_BLOCKED_PAGE_FOR_USER;
 805                 }
 806                 $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 807                 if ( $this->kblength > $wgMaxArticleSize ) {
 808                         // Error will be displayed by showEditForm()
 809                         $this->tooBig = true;
 810                         wfProfileOut( "$fname-checks" );
 811                         wfProfileOut( $fname );
 812                         return self::AS_CONTENT_TOO_BIG;
 813                 }
 814
 815                 if ( !$wgUser->isAllowed('edit') ) {
 816                         if ( $wgUser->isAnon() ) {
 817                                 wfProfileOut( "$fname-checks" );
 818                                 wfProfileOut( $fname );
 819                                 return self::AS_READ_ONLY_PAGE_ANON;
 820                         }
 821                         else {
 822                                 wfProfileOut( "$fname-checks" );
 823                                 wfProfileOut( $fname );
 824                                 return self::AS_READ_ONLY_PAGE_LOGGED;
 825                         }
 826                 }
 827
 828                 if ( wfReadOnly() ) {
 829                         wfProfileOut( "$fname-checks" );
 830                         wfProfileOut( $fname );
 831                         return self::AS_READ_ONLY_PAGE;
 832                 }
 833                 if ( $wgUser->pingLimiter() ) {
 834                         wfProfileOut( "$fname-checks" );
 835                         wfProfileOut( $fname );
 836                         return self::AS_RATE_LIMITED;
 837                 }
 838
 839                 # If the article has been deleted while editing, don't save it without
 840                 # confirmation
 841                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
 842                         wfProfileOut( "$fname-checks" );
 843                         wfProfileOut( $fname );
 844                         return self::AS_ARTICLE_WAS_DELETED;
 845                 }
 846
 847                 wfProfileOut( "$fname-checks" );
 848
 849                 # If article is new, insert it.
 850                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 851                 if ( 0 == $aid ) {
 852                         // Late check for create permission, just in case *PARANOIA*
 853                         if ( !$this->mTitle->userCan( 'create' ) ) {
 854                                 wfDebug( "$fname: no create permission\n" );
 855                                 wfProfileOut( $fname );
 856                                 return self::AS_NO_CREATE_PERMISSION;
 857                         }
 858
 859                         # Don't save a new article if it's blank.
 860                         if ( '' == $this->textbox1 ) {
 861                                 wfProfileOut( $fname );
 862                                 return self::AS_BLANK_ARTICLE;
 863                         }
 864
 865                         // Run post-section-merge edit filter
 866                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
 867                                 # Error messages etc. could be handled within the hook...
 868                                 wfProfileOut( $fname );
 869                                 return self::AS_HOOK_ERROR;
 870                         }
 871
 872                         # Handle the user preference to force summaries here. Check if it's not a redirect.
 873                         if ( !$this->allowBlankSummary && !Title::newFromRedirect( $this->textbox1 ) ) {
 874                                 if ( md5( $this->summary ) == $this->autoSumm ) {
 875                                         $this->missingSummary = true;
 876                                         wfProfileOut( $fname );
 877                                         return self::AS_SUMMARY_NEEDED;
 878                                 }
 879                         }
 880
 881                         $isComment = ( $this->section == 'new' );
 882
 883                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 884                                 $this->minoredit, $this->watchthis, false, $isComment, $bot);
 885
 886                         wfProfileOut( $fname );
 887                         return self::AS_SUCCESS_NEW_ARTICLE;
 888                 }
 889
 890                 # Article exists. Check for edit conflict.
 891
 892                 $this->mArticle->clear(); # Force reload of dates, etc.
 893                 $this->mArticle->forUpdate( true ); # Lock the article
 894
 895                 wfDebug("timestamp: {$this->mArticle->getTimestamp()}, edittime: {$this->edittime}\n");
 896
 897                 if ( $this->mArticle->getTimestamp() != $this->edittime ) {
 898                         $this->isConflict = true;
 899                         if ( $this->section == 'new' ) {
 900                                 if ( $this->mArticle->getUserText() == $wgUser->getName() &&
 901                                         $this->mArticle->getComment() == $this->summary ) {
 902                                         // Probably a duplicate submission of a new comment.
 903                                         // This can happen when squid resends a request after
 904                                         // a timeout but the first one actually went through.
 905                                         wfDebug( "EditPage::editForm duplicate new section submission; trigger edit conflict!\n" );
 906                                 } else {
 907                                         // New comment; suppress conflict.
 908                                         $this->isConflict = false;
 909                                         wfDebug( "EditPage::editForm conflict suppressed; new section\n" );
 910                                 }
 911                         }
 912                 }
 913                 $userid = $wgUser->getId();
 914
 915                 # Suppress edit conflict with self, except for section edits where merging is required.
 916                 if ( $this->isConflict && $this->section == '' && $this->userWasLastToEdit($userid,$this->edittime) ) {
 917                         wfDebug( "EditPage::editForm Suppressing edit conflict, same user.\n" );
 918                         $this->isConflict = false;
 919                 }
 920
 921                 if ( $this->isConflict ) {
 922                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 923                                 $this->mArticle->getTimestamp() . "')\n" );
 924                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime );
 925                 } else {
 926                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 927                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary );
 928                 }
 929                 if ( is_null( $text ) ) {
 930                         wfDebug( "EditPage::editForm activating conflict; section replace failed.\n" );
 931                         $this->isConflict = true;
 932                         $text = $this->textbox1; // do not try to merge here!
 933                 } else if ( $this->isConflict ) {
 934                         # Attempt merge
 935                         if ( $this->mergeChangesInto( $text ) ) {
 936                                 // Successful merge! Maybe we should tell the user the good news?
 937                                 $this->isConflict = false;
 938                                 wfDebug( "EditPage::editForm Suppressing edit conflict, successful merge.\n" );
 939                         } else {
 940                                 $this->section = '';
 941                                 $this->textbox1 = $text;
 942                                 wfDebug( "EditPage::editForm Keeping edit conflict, failed merge.\n" );
 943                         }
 944                 }
 945
 946                 if ( $this->isConflict ) {
 947                         wfProfileOut( $fname );
 948                         return self::AS_CONFLICT_DETECTED;
 949                 }
 950
 951                 $oldtext = $this->mArticle->getContent();
 952
 953                 // Run post-section-merge edit filter
 954                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$this->hookError, $this->summary ) ) ) {
 955                         # Error messages etc. could be handled within the hook...
 956                         wfProfileOut( $fname );
 957                         return self::AS_HOOK_ERROR;
 958                 }
 959
 960                 # Handle the user preference to force summaries here, but not for null edits
 961                 if ( $this->section != 'new' && !$this->allowBlankSummary && 0 != strcmp($oldtext,$text)
 962                         && !Title::newFromRedirect( $text ) ) # check if it's not a redirect
 963                 {
 964                         if ( md5( $this->summary ) == $this->autoSumm ) {
 965                                 $this->missingSummary = true;
 966                                 wfProfileOut( $fname );
 967                                 return self::AS_SUMMARY_NEEDED;
 968                         }
 969                 }
 970
 971                 # And a similar thing for new sections
 972                 if ( $this->section == 'new' && !$this->allowBlankSummary ) {
 973                         if (trim($this->summary) == '') {
 974                                 $this->missingSummary = true;
 975                                 wfProfileOut( $fname );
 976                                 return self::AS_SUMMARY_NEEDED;
 977                         }
 978                 }
 979
 980                 # All's well
 981                 wfProfileIn( "$fname-sectionanchor" );
 982                 $sectionanchor = '';
 983                 if ( $this->section == 'new' ) {
 984                         if ( $this->textbox1 == '' ) {
 985                                 $this->missingComment = true;
 986                                 return self::AS_TEXTBOX_EMPTY;
 987                         }
 988                         if ( $this->summary != '' ) {
 989                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $this->summary );
 990                                 # This is a new section, so create a link to the new section
 991                                 # in the revision summary.
 992                                 $cleanSummary = $wgParser->stripSectionName( $this->summary );
 993                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
 994                         }
 995                 } elseif ( $this->section != '' ) {
 996                         # Try to get a section anchor from the section source, redirect to edited section if header found
 997                         # XXX: might be better to integrate this into Article::replaceSection
 998                         # for duplicate heading checking and maybe parsing
 999                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1000                         # we can't deal with anchors, includes, html etc in the header for now,
1001                         # headline would need to be parsed to improve this
1002                         if ( $hasmatch and strlen($matches[2]) > 0 ) {
1003                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $matches[2] );
1004                         }
1005                 }
1006                 wfProfileOut( "$fname-sectionanchor" );
1007
1008                 // Save errors may fall down to the edit form, but we've now
1009                 // merged the section into full text. Clear the section field
1010                 // so that later submission of conflict forms won't try to
1011                 // replace that into a duplicated mess.
1012                 $this->textbox1 = $text;
1013                 $this->section = '';
1014
1015                 // Check for length errors again now that the section is merged in
1016                 $this->kblength = (int)(strlen( $text ) / 1024);
1017                 if ( $this->kblength > $wgMaxArticleSize ) {
1018                         $this->tooBig = true;
1019                         wfProfileOut( $fname );
1020                         return self::AS_MAX_ARTICLE_SIZE_EXCEEDED;
1021                 }
1022
1023                 # update the article here
1024                 if ( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
1025                         $this->watchthis, $bot, $sectionanchor ) )
1026                 {
1027                         wfProfileOut( $fname );
1028                         return self::AS_SUCCESS_UPDATE;
1029                 } else {
1030                         $this->isConflict = true;
1031                 }
1032                 wfProfileOut( $fname );
1033                 return self::AS_END;
1034         }
1035
1036         /**
1037          * Check if no edits were made by other users since
1038          * the time a user started editing the page. Limit to
1039          * 50 revisions for the sake of performance.
1040          */
1041         protected function userWasLastToEdit( $id, $edittime ) {
1042                 if( !$id ) return false;
1043                 $dbw = wfGetDB( DB_MASTER );
1044                 $res = $dbw->select( 'revision',
1045                         'rev_user',
1046                         array(
1047                                 'rev_page' => $this->mArticle->getId(),
1048                                 'rev_timestamp > '.$dbw->addQuotes( $dbw->timestamp($edittime) )
1049                         ),
1050                         __METHOD__,
1051                         array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
1052                 while( $row = $res->fetchObject() ) {
1053                         if( $row->rev_user != $id ) {
1054                                 return false;
1055                         }
1056                 }
1057                 return true;
1058         }
1059
1060         /**
1061          * Check given input text against $wgSpamRegex, and return the text of the first match.
1062          * @return mixed -- matching string or false
1063          */
1064         public static function matchSpamRegex( $text ) {
1065                 global $wgSpamRegex;
1066                 if ( $wgSpamRegex ) {
1067                         // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1068                         $regexes = (array)$wgSpamRegex;
1069                         foreach( $regexes as $regex ) {
1070                                 $matches = array();
1071                                 if ( preg_match( $regex, $text, $matches ) ) {
1072                                         return $matches[0];
1073                                 }
1074                         }
1075                 }
1076                 return false;
1077         }
1078
1079         /**
1080          * Initialise form fields in the object
1081          * Called on the first invocation, e.g. when a user clicks an edit link
1082          */
1083         function initialiseForm() {
1084                 $this->edittime = $this->mArticle->getTimestamp();
1085                 $this->textbox1 = $this->getContent( false );
1086                 if ( $this->textbox1 === false ) return false;
1087                 wfProxyCheck();
1088                 return true;
1089         }
1090
1091         function setHeaders() {
1092                 global $wgOut, $wgTitle;
1093                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1094                 if ( $this->formtype == 'preview' ) {
1095                         $wgOut->setPageTitleActionText( wfMsg( 'preview' ) );
1096                 }
1097                 if ( $this->isConflict ) {
1098                         $wgOut->setPageTitle( wfMsg( 'editconflict', $wgTitle->getPrefixedText() ) );
1099                 } elseif ( $this->section != '' ) {
1100                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1101                         $wgOut->setPageTitle( wfMsg( $msg, $wgTitle->getPrefixedText() ) );
1102                 } else {
1103                         # Use the title defined by DISPLAYTITLE magic word when present
1104                         if ( isset($this->mParserOutput)
1105                          && ( $dt = $this->mParserOutput->getDisplayTitle() ) !== false ) {
1106                                 $title = $dt;
1107                         } else {
1108                                 $title = $wgTitle->getPrefixedText();
1109                         }
1110                         $wgOut->setPageTitle( wfMsg( 'editing', $title ) );
1111                 }
1112         }
1113
1114         /**
1115          * Send the edit form and related headers to $wgOut
1116          * @param $formCallback Optional callable that takes an OutputPage
1117          *                      parameter; will be called during form output
1118          *                      near the top, for captchas and the like.
1119          */
1120         function showEditForm( $formCallback=null ) {
1121                 global $wgOut, $wgUser, $wgLang, $wgContLang, $wgMaxArticleSize, $wgTitle, $wgRequest;
1122
1123                 # If $wgTitle is null, that means we're in API mode.
1124                 # Some hook probably called this function  without checking
1125                 # for is_null($wgTitle) first. Bail out right here so we don't
1126                 # do lots of work just to discard it right after.
1127                 if (is_null($wgTitle))
1128                         return;
1129
1130                 $fname = 'EditPage::showEditForm';
1131                 wfProfileIn( $fname );
1132
1133                 $sk = $wgUser->getSkin();
1134
1135                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) ) ;
1136
1137                 #need to parse the preview early so that we know which templates are used,
1138                 #otherwise users with "show preview after edit box" will get a blank list
1139                 #we parse this near the beginning so that setHeaders can do the title
1140                 #setting work instead of leaving it in getPreviewText
1141                 $previewOutput = '';
1142                 if ( $this->formtype == 'preview' ) {
1143                         $previewOutput = $this->getPreviewText();
1144                 }
1145
1146                 $this->setHeaders();
1147
1148                 # Enabled article-related sidebar, toplinks, etc.
1149                 $wgOut->setArticleRelated( true );
1150
1151                 if ( $this->isConflict ) {
1152                         $wgOut->addWikiMsg( 'explainconflict' );
1153
1154                         $this->textbox2 = $this->textbox1;
1155                         $this->textbox1 = $this->getContent();
1156                         $this->edittime = $this->mArticle->getTimestamp();
1157                 } else {
1158                         if ( $this->section != '' && $this->section != 'new' ) {
1159                                 $matches = array();
1160                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
1161                                         preg_match( "/^(=+)(.+)\\1/mi", $this->textbox1, $matches );
1162                                         if ( !empty( $matches[2] ) ) {
1163                                                 global $wgParser;
1164                                                 $this->summary = "/* " .
1165                                                         $wgParser->stripSectionName(trim($matches[2])) .
1166                                                         " */ ";
1167                                         }
1168                                 }
1169                         }
1170
1171                         if ( $this->missingComment ) {
1172                                 $wgOut->wrapWikiMsg( '<div id="mw-missingcommenttext">$1</div>',  'missingcommenttext' );
1173                         }
1174
1175                         if ( $this->missingSummary && $this->section != 'new' ) {
1176                                 $wgOut->wrapWikiMsg( '<div id="mw-missingsummary">$1</div>', 'missingsummary' );
1177                         }
1178
1179                         if ( $this->missingSummary && $this->section == 'new' ) {
1180                                 $wgOut->wrapWikiMsg( '<div id="mw-missingcommentheader">$1</div>', 'missingcommentheader' );
1181                         }
1182
1183                         if ( $this->hookError !== '' ) {
1184                                 $wgOut->addWikiText( $this->hookError );
1185                         }
1186
1187                         if ( !$this->checkUnicodeCompliantBrowser() ) {
1188                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
1189                         }
1190                         if ( isset( $this->mArticle ) && isset( $this->mArticle->mRevision ) ) {
1191                         // Let sysop know that this will make private content public if saved
1192
1193                                 if ( !$this->mArticle->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1194                                         $wgOut->addWikiMsg( 'rev-deleted-text-permission' );
1195                                 } else if ( $this->mArticle->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1196                                         $wgOut->addWikiMsg( 'rev-deleted-text-view' );
1197                                 }
1198
1199                                 if ( !$this->mArticle->mRevision->isCurrent() ) {
1200                                         $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
1201                                         $wgOut->addWikiMsg( 'editingold' );
1202                                 }
1203                         }
1204                 }
1205
1206                 if ( wfReadOnly() ) {
1207                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
1208                 } elseif ( $wgUser->isAnon() && $this->formtype != 'preview' ) {
1209                         $wgOut->wrapWikiMsg( '<div id="mw-anon-edit-warning">$1</div>', 'anoneditwarning' );
1210                 } else {
1211                         if ( $this->isCssJsSubpage ) {
1212                                 # Check the skin exists
1213                                 if ( $this->isValidCssJsSubpage ) {
1214                                         if ( $this->formtype !== 'preview' ) {
1215                                                 $wgOut->addWikiMsg( 'usercssjsyoucanpreview' );
1216                                         }
1217                                 } else {
1218                                         $wgOut->addWikiMsg( 'userinvalidcssjstitle', $wgTitle->getSkinFromCssJsSubpage() );
1219                                 }
1220                         }
1221                 }
1222
1223                 $classes = array(); // Textarea CSS
1224                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1225                         # Show a warning if editing an interface message
1226                         $wgOut->addWikiMsg( 'editinginterface' );
1227                 } elseif ( $this->mTitle->isProtected( 'edit' ) ) {
1228                         # Is the title semi-protected?
1229                         if ( $this->mTitle->isSemiProtected() ) {
1230                                 $noticeMsg = 'semiprotectedpagewarning';
1231                                 $classes[] = 'mw-textarea-sprotected';
1232                         } else {
1233                                 # Then it must be protected based on static groups (regular)
1234                                 $noticeMsg = 'protectedpagewarning';
1235                                 $classes[] = 'mw-textarea-protected';
1236                         }
1237                         $wgOut->addHTML( "<div class='mw-warning-with-logexcerpt'>\n" );
1238                         $wgOut->addWikiMsg( $noticeMsg );
1239                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle->getPrefixedText(), '', 1 );
1240                         $wgOut->addHTML( "</div>\n" );
1241                 }
1242                 if ( $this->mTitle->isCascadeProtected() ) {
1243                         # Is this page under cascading protection from some source pages?
1244                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
1245                         $notice = "$1\n";
1246                         if ( count($cascadeSources) > 0 ) {
1247                                 # Explain, and list the titles responsible
1248                                 foreach( $cascadeSources as $page ) {
1249                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
1250                                 }
1251                         }
1252                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', count($cascadeSources) ) );
1253                 }
1254                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
1255                         $wgOut->addWikiMsg( 'titleprotectedwarning' );
1256                 }
1257
1258                 if ( $this->kblength === false ) {
1259                         $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
1260                 }
1261                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
1262                         $wgOut->addHTML( "<div class='error' id='mw-edit-longpageerror'>\n" );
1263                         $wgOut->addWikiMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) );
1264                         $wgOut->addHTML( "</div>\n" );
1265                 } elseif ( $this->kblength > 29 ) {
1266                         $wgOut->addHTML( "<div id='mw-edit-longpagewarning'>\n" );
1267                         $wgOut->addWikiMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) );
1268                         $wgOut->addHTML( "</div>\n" );
1269                 }
1270
1271                 $q = 'action='.$this->action;
1272                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
1273                 $action = $wgTitle->escapeLocalURL( $q );
1274
1275                 $summary = wfMsg( 'summary' );
1276                 $subject = wfMsg( 'subject' );
1277
1278                 $cancel = $sk->makeKnownLink( $wgTitle->getPrefixedText(),
1279                                 wfMsgExt('cancel', array('parseinline')) );
1280                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ));
1281                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
1282                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
1283                         htmlspecialchars( wfMsg( 'newwindow' ) );
1284
1285                 global $wgRightsText;
1286                 if ( $wgRightsText ) {
1287                         $copywarnMsg = array( 'copyrightwarning',
1288                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
1289                                 $wgRightsText );
1290                 } else {
1291                         $copywarnMsg = array( 'copyrightwarning2',
1292                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
1293                 }
1294
1295                 if ( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
1296                         # prepare toolbar for edit buttons
1297                         $toolbar = EditPage::getEditToolbar();
1298                 } else {
1299                         $toolbar = '';
1300                 }
1301
1302                 // activate checkboxes if user wants them to be always active
1303                 if ( !$this->preview && !$this->diff ) {
1304                         # Sort out the "watch" checkbox
1305                         if ( $wgUser->getOption( 'watchdefault' ) ) {
1306                                 # Watch all edits
1307                                 $this->watchthis = true;
1308                         } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1309                                 # Watch creations
1310                                 $this->watchthis = true;
1311                         } elseif ( $this->mTitle->userIsWatching() ) {
1312                                 # Already watched
1313                                 $this->watchthis = true;
1314                         }
1315
1316                         # May be overriden by request parameters
1317                         if( $wgRequest->getBool( 'watchthis' ) ) {
1318                                 $this->watchthis = true;
1319                         }
1320
1321                         if ( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
1322                 }
1323
1324                 $wgOut->addHTML( $this->editFormPageTop );
1325
1326                 if ( $wgUser->getOption( 'previewontop' ) ) {
1327                         $this->displayPreviewArea( $previewOutput, true );
1328                 }
1329
1330
1331                 $wgOut->addHTML( $this->editFormTextTop );
1332
1333                 # if this is a comment, show a subject line at the top, which is also the edit summary.
1334                 # Otherwise, show a summary field at the bottom
1335                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
1336
1337                 # If a blank edit summary was previously provided, and the appropriate
1338                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1339                 # user being bounced back more than once in the event that a summary
1340                 # is not required.
1341                 #####
1342                 # For a bit more sophisticated detection of blank summaries, hash the
1343                 # automatic one and pass that in the hidden field wpAutoSummary.
1344                 $summaryhiddens =  '';
1345                 if ( $this->missingSummary ) $summaryhiddens .= Xml::hidden( 'wpIgnoreBlankSummary', true );
1346                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1347                 $summaryhiddens .= Xml::hidden( 'wpAutoSummary', $autosumm );
1348                 if ( $this->section == 'new' ) {
1349                         $commentsubject="<span id='wpSummaryLabel'><label for='wpSummary'>{$subject}</label></span>\n<input tabindex='1' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' />{$summaryhiddens}<br />";
1350                         $editsummary = "<div class='editOptions'>\n";
1351                         global $wgParser;
1352                         $formattedSummary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $this->summary ) );
1353                         $subjectpreview = $summarytext && $this->preview ? "<div class=\"mw-summary-preview\">". wfMsg('subject-preview') . $sk->commentBlock( $formattedSummary, $this->mTitle, true )."</div>\n" : '';
1354                         $summarypreview = '';
1355                 } else {
1356                         $commentsubject = '';
1357                         $editsummary="<div class='editOptions'>\n<span id='wpSummaryLabel'><label for='wpSummary'>{$summary}</label></span>\n<input tabindex='2' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' />{$summaryhiddens}<br />";
1358                         $summarypreview = $summarytext && $this->preview ? "<div class=\"mw-summary-preview\">". wfMsg('summary-preview') .$sk->commentBlock( $this->summary, $this->mTitle )."</div>\n" : '';
1359                         $subjectpreview = '';
1360                 }
1361
1362                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
1363                 if ( !$this->preview && !$this->diff ) {
1364                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
1365                 }
1366                 $templates = $this->getTemplates();
1367                 $formattedtemplates = $sk->formatTemplates( $templates, $this->preview, $this->section != '');
1368
1369                 $hiddencats = $this->mArticle->getHiddenCategories();
1370                 $formattedhiddencats = $sk->formatHiddenCategories( $hiddencats );
1371
1372                 global $wgUseMetadataEdit ;
1373                 if ( $wgUseMetadataEdit ) {
1374                         $metadata = $this->mMetaData ;
1375                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
1376                         $top = wfMsgWikiHtml( 'metadata_help' );
1377                         /* ToDo: Replace with clean code */
1378                         $ew = $wgUser->getOption( 'editwidth' );
1379                         if ( $ew ) $ew = " style=\"width:100%\"";
1380                         else $ew = '';
1381                         $cols = $wgUser->getIntOption( 'cols' );
1382                         /* /ToDo */
1383                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
1384                 }
1385                 else $metadata = "" ;
1386
1387                 $recreate = '';
1388                 if ( $this->wasDeletedSinceLastEdit() ) {
1389                         if ( 'save' != $this->formtype ) {
1390                                 $wgOut->wrapWikiMsg( '<div class="error mw-deleted-while-editing">$1</div>', 'deletedwhileediting' );
1391                         } else {
1392                                 // Hide the toolbar and edit area, user can click preview to get it back
1393                                 // Add an confirmation checkbox and explanation.
1394                                 $toolbar = '';
1395                                 $recreate = '<div class="mw-confirm-recreate">' .
1396                                                 $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ) ) .
1397                                                 Xml::checkLabel( wfMsg( 'recreate' ), 'wpRecreate', 'wpRecreate', false,
1398                                                         array( 'title' => $sk->titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
1399                                                 ) . '</div>';
1400                         }
1401                 }
1402
1403                 $tabindex = 2;
1404
1405                 $checkboxes = $this->getCheckboxes( $tabindex, $sk,
1406                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
1407
1408                 $checkboxhtml = implode( $checkboxes, "\n" );
1409
1410                 $buttons = $this->getEditButtons( $tabindex );
1411                 $buttonshtml = implode( $buttons, "\n" );
1412
1413                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
1414                         ? '' : Xml::hidden( 'safemode', '1' );
1415
1416                 $wgOut->addHTML( <<<END
1417 {$toolbar}
1418 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1419 END
1420 );
1421
1422                 if ( is_callable( $formCallback ) ) {
1423                         call_user_func_array( $formCallback, array( &$wgOut ) );
1424                 }
1425
1426                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1427
1428                 // Put these up at the top to ensure they aren't lost on early form submission
1429                 $this->showFormBeforeText();
1430
1431                 $wgOut->addHTML( <<<END
1432 {$recreate}
1433 {$commentsubject}
1434 {$subjectpreview}
1435 {$this->editFormTextBeforeContent}
1436 END
1437 );
1438                 $this->showTextbox1( $classes );
1439
1440                 $wgOut->wrapWikiMsg( "<div id=\"editpage-copywarn\">\n$1\n</div>", $copywarnMsg );
1441                 $wgOut->addHTML( <<<END
1442 {$this->editFormTextAfterWarn}
1443 {$metadata}
1444 {$editsummary}
1445 {$summarypreview}
1446 {$checkboxhtml}
1447 {$safemodehtml}
1448 END
1449 );
1450
1451                 $wgOut->addHTML(
1452 "<div class='editButtons'>
1453 {$buttonshtml}
1454         <span class='editHelp'>{$cancel} | {$edithelp}</span>
1455 </div><!-- editButtons -->
1456 </div><!-- editOptions -->");
1457
1458                 /**
1459                  * To make it harder for someone to slip a user a page
1460                  * which submits an edit form to the wiki without their
1461                  * knowledge, a random token is associated with the login
1462                  * session. If it's not passed back with the submission,
1463                  * we won't save the page, or render user JavaScript and
1464                  * CSS previews.
1465                  *
1466                  * For anon editors, who may not have a session, we just
1467                  * include the constant suffix to prevent editing from
1468                  * broken text-mangling proxies.
1469                  */
1470                 $token = htmlspecialchars( $wgUser->editToken() );
1471                 $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
1472
1473                 $this->showEditTools();
1474
1475                 $wgOut->addHTML( <<<END
1476 {$this->editFormTextAfterTools}
1477 <div class='templatesUsed'>
1478 {$formattedtemplates}
1479 </div>
1480 <div class='hiddencats'>
1481 {$formattedhiddencats}
1482 </div>
1483 END
1484 );
1485
1486                 if ( $this->isConflict && wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
1487                         $wgOut->wrapWikiMsg( '==$1==', "yourdiff" );
1488
1489                         $de = new DifferenceEngine( $this->mTitle );
1490                         $de->setText( $this->textbox2, $this->textbox1 );
1491                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1492
1493                         $wgOut->wrapWikiMsg( '==$1==', "yourtext" );
1494                         $this->showTextbox2();
1495                 }
1496                 $wgOut->addHTML( $this->editFormTextBottom );
1497                 $wgOut->addHTML( "</form>\n" );
1498                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1499                         $this->displayPreviewArea( $previewOutput, false );
1500                 }
1501
1502                 wfProfileOut( $fname );
1503         }
1504
1505         protected function showFormBeforeText() {
1506                 global $wgOut;
1507                 $wgOut->addHTML( "
1508 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
1509 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
1510 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
1511 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
1512         }
1513
1514         protected function showTextbox1( $classes ) {
1515                 $attribs = array( 'tabindex' => 1 );
1516
1517                 if ( $this->wasDeletedSinceLastEdit() )
1518                         $attribs['type'] = 'hidden';
1519                 if ( !empty($classes) )
1520                         $attribs['class'] = implode(' ',$classes);
1521
1522                 $this->showTextbox( $this->textbox1, 'wpTextbox1', $attribs );
1523         }
1524
1525         protected function showTextbox2() {
1526                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6 ) );
1527         }
1528
1529         protected function showTextbox( $content, $name, $attribs = array() ) {
1530                 global $wgOut, $wgUser;
1531
1532                 $wikitext = $this->safeUnicodeOutput( $content );
1533                 if ( $wikitext !== '' ) {
1534                         // Ensure there's a newline at the end, otherwise adding lines
1535                         // is awkward.
1536                         // But don't add a newline if the ext is empty, or Firefox in XHTML
1537                         // mode will show an extra newline. A bit annoying.
1538                         $wikitext .= "\n";
1539                 }
1540
1541                 $attribs['accesskey'] = ',';
1542                 $attribs['id'] = $name;
1543
1544                 if ( $wgUser->getOption( 'editwidth' ) )
1545                         $attribs['style'] = 'width: 100%';
1546
1547                 $wgOut->addHTML( Xml::textarea(
1548                         $name,
1549                         $wikitext,
1550                         $wgUser->getIntOption( 'cols' ), $wgUser->getIntOption( 'rows' ),
1551                         $attribs ) );
1552         }
1553
1554         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
1555                 global $wgOut;
1556                 $classes = array();
1557                 if ( $isOnTop )
1558                         $classes[] = 'ontop';
1559
1560                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
1561
1562                 if ( $this->formtype != 'preview' )
1563                         $attribs['style'] = 'display: none;';
1564
1565                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
1566
1567                 if ( $this->formtype == 'preview' ) {
1568                         $this->showPreview( $previewOutput );
1569                 }
1570
1571                 $wgOut->addHTML( '</div>' );
1572
1573                 if ( $this->formtype == 'diff') {
1574                         $this->showDiff();
1575                 }
1576         }
1577
1578         /**
1579          * Append preview output to $wgOut.
1580          * Includes category rendering if this is a category page.
1581          *
1582          * @param string $text The HTML to be output for the preview.
1583          */
1584         protected function showPreview( $text ) {
1585                 global $wgOut;
1586                 if ( $this->mTitle->getNamespace() == NS_CATEGORY) {
1587                         $this->mArticle->openShowCategory();
1588                 }
1589                 # This hook seems slightly odd here, but makes things more
1590                 # consistent for extensions.
1591                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
1592                 $wgOut->addHTML( $text );
1593                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
1594                         $this->mArticle->closeShowCategory();
1595                 }
1596         }
1597
1598         /**
1599          * Live Preview lets us fetch rendered preview page content and
1600          * add it to the page without refreshing the whole page.
1601          * If not supported by the browser it will fall through to the normal form
1602          * submission method.
1603          *
1604          * This function outputs a script tag to support live preview, and
1605          * returns an onclick handler which should be added to the attributes
1606          * of the preview button
1607          */
1608         function doLivePreviewScript() {
1609                 global $wgOut, $wgTitle;
1610                 $wgOut->addScriptFile( 'preview.js' );
1611                 $liveAction = $wgTitle->getLocalUrl( "action={$this->action}&wpPreview=true&live=true" );
1612                 return "return !lpDoPreview(" .
1613                         "editform.wpTextbox1.value," .
1614                         '"' . $liveAction . '"' . ")";
1615         }
1616
1617         protected function showEditTools() {
1618                 global $wgOut;
1619                 $wgOut->addHTML( '<div class="mw-editTools">' );
1620                 $wgOut->addWikiMsgArray( 'edittools', array(), array( 'content' ) );
1621                 $wgOut->addHTML( '</div>' );
1622         }
1623
1624         function getLastDelete() {
1625                 $dbr = wfGetDB( DB_SLAVE );
1626                 $data = $dbr->selectRow(
1627                         array( 'logging', 'user' ),
1628                         array( 'log_type',
1629                                'log_action',
1630                                'log_timestamp',
1631                                'log_user',
1632                                'log_namespace',
1633                                'log_title',
1634                                'log_comment',
1635                                'log_params',
1636                                'user_name', ),
1637                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1638                                'log_title' => $this->mTitle->getDBkey(),
1639                                'log_type' => 'delete',
1640                                'log_action' => 'delete',
1641                                'user_id=log_user' ),
1642                         __METHOD__,
1643                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
1644
1645                 return $data;
1646         }
1647
1648         /**
1649          * Get the rendered text for previewing.
1650          * @return string
1651          */
1652         function getPreviewText() {
1653                 global $wgOut, $wgUser, $wgTitle, $wgParser, $wgLang, $wgContLang, $wgMessageCache;
1654
1655                 wfProfileIn( __METHOD__ );
1656
1657                 if ( $this->mTriedSave && !$this->mTokenOk ) {
1658                         if ( $this->mTokenOkExceptSuffix ) {
1659                                 $note = wfMsg( 'token_suffix_mismatch' );
1660                         } else {
1661                                 $note = wfMsg( 'session_fail_preview' );
1662                         }
1663                 } else {
1664                         $note = wfMsg( 'previewnote' );
1665                 }
1666
1667                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1668                 $parserOptions->setEditSection( false );
1669
1670                 global $wgRawHtml;
1671                 if ( $wgRawHtml && !$this->mTokenOk ) {
1672                         // Could be an offsite preview attempt. This is very unsafe if
1673                         // HTML is enabled, as it could be an attack.
1674                         return $wgOut->parse( "<div class='previewnote'>" .
1675                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1676                 }
1677
1678                 # don't parse user css/js, show message about preview
1679                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1680
1681                 if ( $this->isCssJsSubpage ) {
1682                         if (preg_match("/\\.css$/", $this->mTitle->getText() ) ) {
1683                                 $previewtext = wfMsg('usercsspreview');
1684                         } else if (preg_match("/\\.js$/", $this->mTitle->getText() ) ) {
1685                                 $previewtext = wfMsg('userjspreview');
1686                         }
1687                         $parserOptions->setTidy(true);
1688                         $parserOutput = $wgParser->parse( $previewtext, $this->mTitle, $parserOptions );
1689                         $previewHTML = $parserOutput->mText;
1690                 } elseif ( $rt = Title::newFromRedirect( $this->textbox1 ) ) {
1691                         $previewHTML = $this->mArticle->viewRedirect( $rt, false );
1692                 } else {
1693                         $toparse = $this->textbox1;
1694
1695                         # If we're adding a comment, we need to show the
1696                         # summary as the headline
1697                         if ( $this->section=="new" && $this->summary!="" ) {
1698                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1699                         }
1700
1701                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData;
1702
1703                         // Parse mediawiki messages with correct target language
1704                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1705                                 list( /* $unused */, $lang ) = $wgMessageCache->figureMessage( $this->mTitle->getText() );
1706                                 $obj = wfGetLangObj( $lang );
1707                                 $parserOptions->setTargetLanguage( $obj );
1708                         }
1709
1710
1711                         $parserOptions->setTidy(true);
1712                         $parserOptions->enableLimitReport();
1713                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ),
1714                                         $this->mTitle, $parserOptions );
1715
1716                         $previewHTML = $parserOutput->getText();
1717                         $this->mParserOutput = $parserOutput;
1718                         $wgOut->addParserOutputNoText( $parserOutput );
1719
1720                         if ( count( $parserOutput->getWarnings() ) ) {
1721                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
1722                         }
1723                 }
1724
1725                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
1726                         "<div class='previewnote'>" . $wgOut->parse( $note ) . "</div>\n";
1727                 if ( $this->isConflict ) {
1728                         $previewhead .='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1729                 }
1730
1731                 wfProfileOut( __METHOD__ );
1732                 return $previewhead . $previewHTML;
1733         }
1734
1735         function getTemplates() {
1736                 if ( $this->preview || $this->section != '' ) {
1737                         $templates = array();
1738                         if ( !isset($this->mParserOutput) ) return $templates;
1739                         foreach( $this->mParserOutput->getTemplates() as $ns => $template) {
1740                                 foreach( array_keys( $template ) as $dbk ) {
1741                                         $templates[] = Title::makeTitle($ns, $dbk);
1742                                 }
1743                         }
1744                         return $templates;
1745                 } else {
1746                         return $this->mArticle->getUsedTemplates();
1747                 }
1748         }
1749
1750         /**
1751          * Call the stock "user is blocked" page
1752          */
1753         function blockedPage() {
1754                 global $wgOut, $wgUser;
1755                 $wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
1756
1757                 # If the user made changes, preserve them when showing the markup
1758                 # (This happens when a user is blocked during edit, for instance)
1759                 $first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
1760                 if ( $first ) {
1761                         $source = $this->mTitle->exists() ? $this->getContent() : false;
1762                 } else {
1763                         $source = $this->textbox1;
1764                 }
1765
1766                 # Spit out the source or the user's modified version
1767                 if ( $source !== false ) {
1768                         $rows = $wgUser->getIntOption( 'rows' );
1769                         $cols = $wgUser->getIntOption( 'cols' );
1770                         $attribs = array( 'id' => 'wpTextbox1', 'name' => 'wpTextbox1', 'cols' => $cols, 'rows' => $rows, 'readonly' => 'readonly' );
1771                         $wgOut->addHTML( '<hr />' );
1772                         $wgOut->addWikiMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() );
1773                         # Why we don't use Xml::element here?
1774                         # Is it because if $source is '', it returns <textarea />?
1775                         $wgOut->addHTML( Xml::openElement( 'textarea', $attribs ) . htmlspecialchars( $source ) . Xml::closeElement( 'textarea' ) );
1776                 }
1777         }
1778
1779         /**
1780          * Produce the stock "please login to edit pages" page
1781          */
1782         function userNotLoggedInPage() {
1783                 global $wgUser, $wgOut, $wgTitle;
1784                 $skin = $wgUser->getSkin();
1785
1786                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1787                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $wgTitle->getPrefixedUrl() );
1788
1789                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1790                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1791                 $wgOut->setArticleRelated( false );
1792
1793                 $wgOut->addHTML( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
1794                 $wgOut->returnToMain( false, $wgTitle );
1795         }
1796
1797         /**
1798          * Creates a basic error page which informs the user that
1799          * they have attempted to edit a nonexistent section.
1800          */
1801         function noSuchSectionPage() {
1802                 global $wgOut, $wgTitle;
1803
1804                 $wgOut->setPageTitle( wfMsg( 'nosuchsectiontitle' ) );
1805                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1806                 $wgOut->setArticleRelated( false );
1807
1808                 $wgOut->addWikiMsg( 'nosuchsectiontext', $this->section );
1809                 $wgOut->returnToMain( false, $wgTitle );
1810         }
1811
1812         /**
1813          * Produce the stock "your edit contains spam" page
1814          *
1815          * @param $match Text which triggered one or more filters
1816          */
1817         function spamPage( $match = false ) {
1818                 global $wgOut, $wgTitle;
1819
1820                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1821                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1822                 $wgOut->setArticleRelated( false );
1823
1824                 $wgOut->addHTML( '<div id="spamprotected">' );
1825                 $wgOut->addWikiMsg( 'spamprotectiontext' );
1826                 if ( $match )
1827                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
1828                 $wgOut->addHTML( '</div>' );
1829
1830                 $wgOut->returnToMain( false, $wgTitle );
1831         }
1832
1833         /**
1834          * @private
1835          * @todo document
1836          */
1837         function mergeChangesInto( &$editText ){
1838                 $fname = 'EditPage::mergeChangesInto';
1839                 wfProfileIn( $fname );
1840
1841                 $db = wfGetDB( DB_MASTER );
1842
1843                 // This is the revision the editor started from
1844                 $baseRevision = $this->getBaseRevision();
1845                 if ( is_null( $baseRevision ) ) {
1846                         wfProfileOut( $fname );
1847                         return false;
1848                 }
1849                 $baseText = $baseRevision->getText();
1850
1851                 // The current state, we want to merge updates into it
1852                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1853                 if ( is_null( $currentRevision ) ) {
1854                         wfProfileOut( $fname );
1855                         return false;
1856                 }
1857                 $currentText = $currentRevision->getText();
1858
1859                 $result = '';
1860                 if ( wfMerge( $baseText, $editText, $currentText, $result ) ) {
1861                         $editText = $result;
1862                         wfProfileOut( $fname );
1863                         return true;
1864                 } else {
1865                         wfProfileOut( $fname );
1866                         return false;
1867                 }
1868         }
1869
1870         /**
1871          * Check if the browser is on a blacklist of user-agents known to
1872          * mangle UTF-8 data on form submission. Returns true if Unicode
1873          * should make it through, false if it's known to be a problem.
1874          * @return bool
1875          * @private
1876          */
1877         function checkUnicodeCompliantBrowser() {
1878                 global $wgBrowserBlackList;
1879                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
1880                         // No User-Agent header sent? Trust it by default...
1881                         return true;
1882                 }
1883                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1884                 foreach ( $wgBrowserBlackList as $browser ) {
1885                         if ( preg_match($browser, $currentbrowser) ) {
1886                                 return false;
1887                         }
1888                 }
1889                 return true;
1890         }
1891
1892         /**
1893          * @deprecated use $wgParser->stripSectionName()
1894          */
1895         function pseudoParseSectionAnchor( $text ) {
1896                 global $wgParser;
1897                 return $wgParser->stripSectionName( $text );
1898         }
1899
1900         /**
1901          * Format an anchor fragment as it would appear for a given section name
1902          * @param string $text
1903          * @return string
1904          * @private
1905          */
1906         function sectionAnchor( $text ) {
1907                 global $wgParser;
1908                 return $wgParser->guessSectionNameFromWikiText( $text );
1909         }
1910
1911         /**
1912          * Shows a bulletin board style toolbar for common editing functions.
1913          * It can be disabled in the user preferences.
1914          * The necessary JavaScript code can be found in skins/common/edit.js.
1915          *
1916          * @return string
1917          */
1918         static function getEditToolbar() {
1919                 global $wgStylePath, $wgContLang, $wgLang, $wgJsMimeType;
1920
1921                 /**
1922                  * toolarray an array of arrays which each include the filename of
1923                  * the button image (without path), the opening tag, the closing tag,
1924                  * and optionally a sample text that is inserted between the two when no
1925                  * selection is highlighted.
1926                  * The tip text is shown when the user moves the mouse over the button.
1927                  *
1928                  * Already here are accesskeys (key), which are not used yet until someone
1929                  * can figure out a way to make them work in IE. However, we should make
1930                  * sure these keys are not defined on the edit page.
1931                  */
1932                 $toolarray = array(
1933                         array(
1934                                 'image'  => $wgLang->getImageFile('button-bold'),
1935                                 'id'     => 'mw-editbutton-bold',
1936                                 'open'   => '\'\'\'',
1937                                 'close'  => '\'\'\'',
1938                                 'sample' => wfMsg('bold_sample'),
1939                                 'tip'    => wfMsg('bold_tip'),
1940                                 'key'    => 'B'
1941                         ),
1942                         array(
1943                                 'image'  => $wgLang->getImageFile('button-italic'),
1944                                 'id'     => 'mw-editbutton-italic',
1945                                 'open'   => '\'\'',
1946                                 'close'  => '\'\'',
1947                                 'sample' => wfMsg('italic_sample'),
1948                                 'tip'    => wfMsg('italic_tip'),
1949                                 'key'    => 'I'
1950                         ),
1951                         array(
1952                                 'image'  => $wgLang->getImageFile('button-link'),
1953                                 'id'     => 'mw-editbutton-link',
1954                                 'open'   => '[[',
1955                                 'close'  => ']]',
1956                                 'sample' => wfMsg('link_sample'),
1957                                 'tip'    => wfMsg('link_tip'),
1958                                 'key'    => 'L'
1959                         ),
1960                         array(
1961                                 'image'  => $wgLang->getImageFile('button-extlink'),
1962                                 'id'     => 'mw-editbutton-extlink',
1963                                 'open'   => '[',
1964                                 'close'  => ']',
1965                                 'sample' => wfMsg('extlink_sample'),
1966                                 'tip'    => wfMsg('extlink_tip'),
1967                                 'key'    => 'X'
1968                         ),
1969                         array(
1970                                 'image'  => $wgLang->getImageFile('button-headline'),
1971                                 'id'     => 'mw-editbutton-headline',
1972                                 'open'   => "\n== ",
1973                                 'close'  => " ==\n",
1974                                 'sample' => wfMsg('headline_sample'),
1975                                 'tip'    => wfMsg('headline_tip'),
1976                                 'key'    => 'H'
1977                         ),
1978                         array(
1979                                 'image'  => $wgLang->getImageFile('button-image'),
1980                                 'id'     => 'mw-editbutton-image',
1981                                 'open'   => '[['.$wgContLang->getNsText(NS_FILE).':',
1982                                 'close'  => ']]',
1983                                 'sample' => wfMsg('image_sample'),
1984                                 'tip'    => wfMsg('image_tip'),
1985                                 'key'    => 'D'
1986                         ),
1987                         array(
1988                                 'image'  => $wgLang->getImageFile('button-media'),
1989                                 'id'     => 'mw-editbutton-media',
1990                                 'open'   => '[['.$wgContLang->getNsText(NS_MEDIA).':',
1991                                 'close'  => ']]',
1992                                 'sample' => wfMsg('media_sample'),
1993                                 'tip'    => wfMsg('media_tip'),
1994                                 'key'    => 'M'
1995                         ),
1996                         array(
1997                                 'image'  => $wgLang->getImageFile('button-math'),
1998                                 'id'     => 'mw-editbutton-math',
1999                                 'open'   => "<math>",
2000                                 'close'  => "</math>",
2001                                 'sample' => wfMsg('math_sample'),
2002                                 'tip'    => wfMsg('math_tip'),
2003                                 'key'    => 'C'
2004                         ),
2005                         array(
2006                                 'image'  => $wgLang->getImageFile('button-nowiki'),
2007                                 'id'     => 'mw-editbutton-nowiki',
2008                                 'open'   => "<nowiki>",
2009                                 'close'  => "</nowiki>",
2010                                 'sample' => wfMsg('nowiki_sample'),
2011                                 'tip'    => wfMsg('nowiki_tip'),
2012                                 'key'    => 'N'
2013                         ),
2014                         array(
2015                                 'image'  => $wgLang->getImageFile('button-sig'),
2016                                 'id'     => 'mw-editbutton-signature',
2017                                 'open'   => '--~~~~',
2018                                 'close'  => '',
2019                                 'sample' => '',
2020                                 'tip'    => wfMsg('sig_tip'),
2021                                 'key'    => 'Y'
2022                         ),
2023                         array(
2024                                 'image'  => $wgLang->getImageFile('button-hr'),
2025                                 'id'     => 'mw-editbutton-hr',
2026                                 'open'   => "\n----\n",
2027                                 'close'  => '',
2028                                 'sample' => '',
2029                                 'tip'    => wfMsg('hr_tip'),
2030                                 'key'    => 'R'
2031                         )
2032                 );
2033                 $toolbar = "<div id='toolbar'>\n";
2034                 $toolbar.="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
2035
2036                 foreach($toolarray as $tool) {
2037                         $params = array(
2038                                 $image = $wgStylePath.'/common/images/'.$tool['image'],
2039                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
2040                                 // Older browsers show a "speedtip" type message only for ALT.
2041                                 // Ideally these should be different, realistically they
2042                                 // probably don't need to be.
2043                                 $tip = $tool['tip'],
2044                                 $open = $tool['open'],
2045                                 $close = $tool['close'],
2046                                 $sample = $tool['sample'],
2047                                 $cssId = $tool['id'],
2048                         );
2049
2050                         $paramList = implode( ',',
2051                                 array_map( array( 'Xml', 'encodeJsVar' ), $params ) );
2052                         $toolbar.="addButton($paramList);\n";
2053                 }
2054
2055                 $toolbar.="/*]]>*/\n</script>";
2056                 $toolbar.="\n</div>";
2057                 return $toolbar;
2058         }
2059
2060         /**
2061          * Returns an array of html code of the following checkboxes:
2062          * minor and watch
2063          *
2064          * @param $tabindex Current tabindex
2065          * @param $skin Skin object
2066          * @param $checked Array of checkbox => bool, where bool indicates the checked
2067          *                 status of the checkbox
2068          *
2069          * @return array
2070          */
2071         public function getCheckboxes( &$tabindex, $skin, $checked ) {
2072                 global $wgUser;
2073
2074                 $checkboxes = array();
2075
2076                 $checkboxes['minor'] = '';
2077                 $minorLabel = wfMsgExt('minoredit', array('parseinline'));
2078                 if ( $wgUser->isAllowed('minoredit') ) {
2079                         $attribs = array(
2080                                 'tabindex'  => ++$tabindex,
2081                                 'accesskey' => wfMsg( 'accesskey-minoredit' ),
2082                                 'id'        => 'wpMinoredit',
2083                         );
2084                         $checkboxes['minor'] =
2085                                 Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
2086                                 "&nbsp;<label for='wpMinoredit'".$skin->tooltip('minoredit', 'withaccess').">{$minorLabel}</label>";
2087                 }
2088
2089                 $watchLabel = wfMsgExt('watchthis', array('parseinline'));
2090                 $checkboxes['watch'] = '';
2091                 if ( $wgUser->isLoggedIn() ) {
2092                         $attribs = array(
2093                                 'tabindex'  => ++$tabindex,
2094                                 'accesskey' => wfMsg( 'accesskey-watch' ),
2095                                 'id'        => 'wpWatchthis',
2096                         );
2097                         $checkboxes['watch'] =
2098                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
2099                                 "&nbsp;<label for='wpWatchthis'".$skin->tooltip('watch', 'withaccess').">{$watchLabel}</label>";
2100                 }
2101                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
2102                 return $checkboxes;
2103         }
2104
2105         /**
2106          * Returns an array of html code of the following buttons:
2107          * save, diff, preview and live
2108          *
2109          * @param $tabindex Current tabindex
2110          *
2111          * @return array
2112          */
2113         public function getEditButtons(&$tabindex) {
2114                 global $wgLivePreview, $wgUser;
2115
2116                 $buttons = array();
2117
2118                 $temp = array(
2119                         'id'        => 'wpSave',
2120                         'name'      => 'wpSave',
2121                         'type'      => 'submit',
2122                         'tabindex'  => ++$tabindex,
2123                         'value'     => wfMsg('savearticle'),
2124                         'accesskey' => wfMsg('accesskey-save'),
2125                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
2126                 );
2127                 $buttons['save'] = Xml::element('input', $temp, '');
2128
2129                 ++$tabindex; // use the same for preview and live preview
2130                 if ( $wgLivePreview && $wgUser->getOption( 'uselivepreview' ) ) {
2131                         $temp = array(
2132                                 'id'        => 'wpPreview',
2133                                 'name'      => 'wpPreview',
2134                                 'type'      => 'submit',
2135                                 'tabindex'  => $tabindex,
2136                                 'value'     => wfMsg('showpreview'),
2137                                 'accesskey' => '',
2138                                 'title'     => wfMsg( 'tooltip-preview' ).' ['.wfMsg( 'accesskey-preview' ).']',
2139                                 'style'     => 'display: none;',
2140                         );
2141                         $buttons['preview'] = Xml::element('input', $temp, '');
2142
2143                         $temp = array(
2144                                 'id'        => 'wpLivePreview',
2145                                 'name'      => 'wpLivePreview',
2146                                 'type'      => 'submit',
2147                                 'tabindex'  => $tabindex,
2148                                 'value'     => wfMsg('showlivepreview'),
2149                                 'accesskey' => wfMsg('accesskey-preview'),
2150                                 'title'     => '',
2151                                 'onclick'   => $this->doLivePreviewScript(),
2152                         );
2153                         $buttons['live'] = Xml::element('input', $temp, '');
2154                 } else {
2155                         $temp = array(
2156                                 'id'        => 'wpPreview',
2157                                 'name'      => 'wpPreview',
2158                                 'type'      => 'submit',
2159                                 'tabindex'  => $tabindex,
2160                                 'value'     => wfMsg('showpreview'),
2161                                 'accesskey' => wfMsg('accesskey-preview'),
2162                                 'title'     => wfMsg( 'tooltip-preview' ).' ['.wfMsg( 'accesskey-preview' ).']',
2163                         );
2164                         $buttons['preview'] = Xml::element('input', $temp, '');
2165                         $buttons['live'] = '';
2166                 }
2167
2168                 $temp = array(
2169                         'id'        => 'wpDiff',
2170                         'name'      => 'wpDiff',
2171                         'type'      => 'submit',
2172                         'tabindex'  => ++$tabindex,
2173                         'value'     => wfMsg('showdiff'),
2174                         'accesskey' => wfMsg('accesskey-diff'),
2175                         'title'     => wfMsg( 'tooltip-diff' ).' ['.wfMsg( 'accesskey-diff' ).']',
2176                 );
2177                 $buttons['diff'] = Xml::element('input', $temp, '');
2178
2179                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
2180                 return $buttons;
2181         }
2182
2183         /**
2184          * Output preview text only. This can be sucked into the edit page
2185          * via JavaScript, and saves the server time rendering the skin as
2186          * well as theoretically being more robust on the client (doesn't
2187          * disturb the edit box's undo history, won't eat your text on
2188          * failure, etc).
2189          *
2190          * @todo This doesn't include category or interlanguage links.
2191          *       Would need to enhance it a bit, <s>maybe wrap them in XML
2192          *       or something...</s> that might also require more skin
2193          *       initialization, so check whether that's a problem.
2194          */
2195         function livePreview() {
2196                 global $wgOut;
2197                 $wgOut->disable();
2198                 header( 'Content-type: text/xml; charset=utf-8' );
2199                 header( 'Cache-control: no-cache' );
2200
2201                 $previewText = $this->getPreviewText();
2202                 #$categories = $skin->getCategoryLinks();
2203
2204                 $s =
2205                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
2206                 Xml::tags( 'livepreview', null,
2207                         Xml::element( 'preview', null, $previewText )
2208                         #.      Xml::element( 'category', null, $categories )
2209                 );
2210                 echo $s;
2211         }
2212
2213
2214         /**
2215          * Get a diff between the current contents of the edit box and the
2216          * version of the page we're editing from.
2217          *
2218          * If this is a section edit, we'll replace the section as for final
2219          * save and then make a comparison.
2220          */
2221         function showDiff() {
2222                 $oldtext = $this->mArticle->fetchContent();
2223                 $newtext = $this->mArticle->replaceSection(
2224                         $this->section, $this->textbox1, $this->summary, $this->edittime );
2225                 $newtext = $this->mArticle->preSaveTransform( $newtext );
2226                 $oldtitle = wfMsgExt( 'currentrev', array('parseinline') );
2227                 $newtitle = wfMsgExt( 'yourtext', array('parseinline') );
2228                 if ( $oldtext !== false  || $newtext != '' ) {
2229                         $de = new DifferenceEngine( $this->mTitle );
2230                         $de->setText( $oldtext, $newtext );
2231                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2232                         $de->showDiffStyle();
2233                 } else {
2234                         $difftext = '';
2235                 }
2236
2237                 global $wgOut;
2238                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2239         }
2240
2241         /**
2242          * Filter an input field through a Unicode de-armoring process if it
2243          * came from an old browser with known broken Unicode editing issues.
2244          *
2245          * @param WebRequest $request
2246          * @param string $field
2247          * @return string
2248          * @private
2249          */
2250         function safeUnicodeInput( $request, $field ) {
2251                 $text = rtrim( $request->getText( $field ) );
2252                 return $request->getBool( 'safemode' )
2253                         ? $this->unmakesafe( $text )
2254                         : $text;
2255         }
2256
2257         /**
2258          * Filter an output field through a Unicode armoring process if it is
2259          * going to an old browser with known broken Unicode editing issues.
2260          *
2261          * @param string $text
2262          * @return string
2263          * @private
2264          */
2265         function safeUnicodeOutput( $text ) {
2266                 global $wgContLang;
2267                 $codedText = $wgContLang->recodeForEdit( $text );
2268                 return $this->checkUnicodeCompliantBrowser()
2269                         ? $codedText
2270                         : $this->makesafe( $codedText );
2271         }
2272
2273         /**
2274          * A number of web browsers are known to corrupt non-ASCII characters
2275          * in a UTF-8 text editing environment. To protect against this,
2276          * detected browsers will be served an armored version of the text,
2277          * with non-ASCII chars converted to numeric HTML character references.
2278          *
2279          * Preexisting such character references will have a 0 added to them
2280          * to ensure that round-trips do not alter the original data.
2281          *
2282          * @param string $invalue
2283          * @return string
2284          * @private
2285          */
2286         function makesafe( $invalue ) {
2287                 // Armor existing references for reversability.
2288                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
2289
2290                 $bytesleft = 0;
2291                 $result = "";
2292                 $working = 0;
2293                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2294                         $bytevalue = ord( $invalue{$i} );
2295                         if ( $bytevalue <= 0x7F ) { //0xxx xxxx
2296                                 $result .= chr( $bytevalue );
2297                                 $bytesleft = 0;
2298                         } elseif ( $bytevalue <= 0xBF ) { //10xx xxxx
2299                                 $working = $working << 6;
2300                                 $working += ($bytevalue & 0x3F);
2301                                 $bytesleft--;
2302                                 if ( $bytesleft <= 0 ) {
2303                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
2304                                 }
2305                         } elseif ( $bytevalue <= 0xDF ) { //110x xxxx
2306                                 $working = $bytevalue & 0x1F;
2307                                 $bytesleft = 1;
2308                         } elseif ( $bytevalue <= 0xEF ) { //1110 xxxx
2309                                 $working = $bytevalue & 0x0F;
2310                                 $bytesleft = 2;
2311                         } else { //1111 0xxx
2312                                 $working = $bytevalue & 0x07;
2313                                 $bytesleft = 3;
2314                         }
2315                 }
2316                 return $result;
2317         }
2318
2319         /**
2320          * Reverse the previously applied transliteration of non-ASCII characters
2321          * back to UTF-8. Used to protect data from corruption by broken web browsers
2322          * as listed in $wgBrowserBlackList.
2323          *
2324          * @param string $invalue
2325          * @return string
2326          * @private
2327          */
2328         function unmakesafe( $invalue ) {
2329                 $result = "";
2330                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2331                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
2332                                 $i += 3;
2333                                 $hexstring = "";
2334                                 do {
2335                                         $hexstring .= $invalue{$i};
2336                                         $i++;
2337                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
2338
2339                                 // Do some sanity checks. These aren't needed for reversability,
2340                                 // but should help keep the breakage down if the editor
2341                                 // breaks one of the entities whilst editing.
2342                                 if ( (substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6) ) {
2343                                         $codepoint = hexdec($hexstring);
2344                                         $result .= codepointToUtf8( $codepoint );
2345                                 } else {
2346                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
2347                                 }
2348                         } else {
2349                                 $result .= substr( $invalue, $i, 1 );
2350                         }
2351                 }
2352                 // reverse the transform that we made for reversability reasons.
2353                 return strtr( $result, array( "&#x0" => "&#x" ) );
2354         }
2355
2356         function noCreatePermission() {
2357                 global $wgOut;
2358                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
2359                 $wgOut->addWikiMsg( 'nocreatetext' );
2360         }
2361
2362         /**
2363          * If there are rows in the deletion log for this page, show them,
2364          * along with a nice little note for the user
2365          *
2366          * @param OutputPage $out
2367          */
2368         protected function showDeletionLog( $out ) {
2369                 global $wgUser;
2370                 $loglist = new LogEventsList( $wgUser->getSkin(), $out );
2371                 $pager = new LogPager( $loglist, 'delete', false, $this->mTitle->getPrefixedText() );
2372                 $count = $pager->getNumRows();
2373                 if ( $count > 0 ) {
2374                         $pager->mLimit = 10;
2375                         $out->addHTML( '<div class="mw-warning-with-logexcerpt">' );
2376                         $out->addWikiMsg( 'recreate-deleted-warn' );
2377                         $out->addHTML(
2378                                 $loglist->beginLogEventsList() .
2379                                 $pager->getBody() .
2380                                 $loglist->endLogEventsList()
2381                         );
2382                         if($count > 10){
2383                                 $out->addHTML( $wgUser->getSkin()->link(
2384                                         SpecialPage::getTitleFor( 'Log' ),
2385                                         wfMsgHtml( 'deletelog-fulllog' ),
2386                                         array(),
2387                                         array(
2388                                                 'type' => 'delete',
2389                                                 'page' => $this->mTitle->getPrefixedText() ) ) );
2390                         }
2391                         $out->addHTML( '</div>' );
2392                         return true;
2393                 }
2394
2395                 return false;
2396         }
2397
2398         /**
2399          * Attempt submission
2400          * @return bool false if output is done, true if the rest of the form should be displayed
2401          */
2402         function attemptSave() {
2403                 global $wgUser, $wgOut, $wgTitle, $wgRequest;
2404
2405                 $resultDetails = false;
2406                 $value = $this->internalAttemptSave( $resultDetails, $wgUser->isAllowed('bot') && $wgRequest->getBool('bot', true) );
2407
2408                 if ( $value == self::AS_SUCCESS_UPDATE || $value == self::AS_SUCCESS_NEW_ARTICLE ) {
2409                         $this->didSave = true;
2410                 }
2411
2412                 switch ($value) {
2413                         case self::AS_HOOK_ERROR_EXPECTED:
2414                         case self::AS_CONTENT_TOO_BIG:
2415                         case self::AS_ARTICLE_WAS_DELETED:
2416                         case self::AS_CONFLICT_DETECTED:
2417                         case self::AS_SUMMARY_NEEDED:
2418                         case self::AS_TEXTBOX_EMPTY:
2419                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
2420                         case self::AS_END:
2421                                 return true;
2422
2423                         case self::AS_HOOK_ERROR:
2424                         case self::AS_FILTERING:
2425                         case self::AS_SUCCESS_NEW_ARTICLE:
2426                         case self::AS_SUCCESS_UPDATE:
2427                                 return false;
2428
2429                         case self::AS_SPAM_ERROR:
2430                                 $this->spamPage ( $resultDetails['spam'] );
2431                                 return false;
2432
2433                         case self::AS_BLOCKED_PAGE_FOR_USER:
2434                                 $this->blockedPage();
2435                                 return false;
2436
2437                         case self::AS_IMAGE_REDIRECT_ANON:
2438                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
2439                                 return false;
2440
2441                         case self::AS_READ_ONLY_PAGE_ANON:
2442                                 $this->userNotLoggedInPage();
2443                                 return false;
2444
2445                         case self::AS_READ_ONLY_PAGE_LOGGED:
2446                         case self::AS_READ_ONLY_PAGE:
2447                                 $wgOut->readOnlyPage();
2448                                 return false;
2449
2450                         case self::AS_RATE_LIMITED:
2451                                 $wgOut->rateLimited();
2452                                 return false;
2453
2454                         case self::AS_NO_CREATE_PERMISSION;
2455                                 $this->noCreatePermission();
2456                                 return;
2457
2458                         case self::AS_BLANK_ARTICLE:
2459                                 $wgOut->redirect( $wgTitle->getFullURL() );
2460                                 return false;
2461
2462                         case self::AS_IMAGE_REDIRECT_LOGGED:
2463                                 $wgOut->permissionRequired( 'upload' );
2464                                 return false;
2465                 }
2466         }
2467
2468         function getBaseRevision() {
2469                 if ( $this->mBaseRevision == false ) {
2470                         $db = wfGetDB( DB_MASTER );
2471                         $baseRevision = Revision::loadFromTimestamp(
2472                                 $db, $this->mTitle, $this->edittime );
2473                         return $this->mBaseRevision = $baseRevision;
2474                 } else {
2475                         return $this->mBaseRevision;
2476                 }
2477         }
2478 }