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
 169                                         $undotext = $this->mArticle->getUndoText( $undorev, $oldrev );
 170                                         if ( $undotext === false ) {
 171                                                 # Warn the user that something went wrong
 172                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-failure">' . wfMsgNoTrans( 'undo-failure' ) . '</div>' );
 173                                         } else {
 174                                                 $text = $undotext;
 175                                                 # Inform the user of our success and set an automatic edit summary
 176                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="mw-undo-success">' . wfMsgNoTrans( 'undo-success' ) . '</div>' );
 177                                                 $firstrev = $oldrev->getNext();
 178                                                 # If we just undid one rev, use an autosummary
 179                                                 if ( $firstrev->mId == $undo ) {
 180                                                         $this->summary = wfMsgForContent( 'undo-summary', $undo, $undorev->getUserText() );
 181                                                         $this->undidRev = $undo;
 182                                                 }
 183                                                 $this->formtype = 'diff';
 184                                         }
 185                                 } else {
 186                                         // Failed basic sanity checks.
 187                                         // Older revisions may have been removed since the link
 188                                         // was created, or we may simply have got bogus input.
 189                                         $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-norev">' . wfMsgNoTrans( 'undo-norev' ) . '</div>' );
 190                                 }
 191                         } else if ( $section != '' ) {
 192                                 if ( $section == 'new' ) {
 193                                         $text = $this->getPreloadedText( $preload );
 194                                 } else {
 195                                         $text = $wgParser->getSection( $text, $section, $def_text );
 196                                 }
 197                         }
 198                 }
 199
 200                 wfProfileOut( __METHOD__ );
 201                 return $text;
 202         }
 203
 204         /**
 205          * Get the contents of a page from its title and remove includeonly tags
 206          *
 207          * @param $preload String: the title of the page.
 208          * @return string The contents of the page.
 209          */
 210         protected function getPreloadedText( $preload ) {
 211                 if ( $preload === '' ) {
 212                         return '';
 213                 } else {
 214                         $preloadTitle = Title::newFromText( $preload );
 215                         if ( isset( $preloadTitle ) && $preloadTitle->userCanRead() ) {
 216                                 $rev = Revision::newFromTitle($preloadTitle);
 217                                 if ( is_object( $rev ) ) {
 218                                         $text = $rev->getText();
 219                                         // TODO FIXME: AAAAAAAAAAA, this shouldn't be implementing
 220                                         // its own mini-parser! -ævar
 221                                         $text = preg_replace( '~</?includeonly>~', '', $text );
 222                                         return $text;
 223                                 } else
 224                                         return '';
 225                         }
 226                 }
 227         }
 228
 229         /**
 230          * This is the function that extracts metadata from the article body on the first view.
 231          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
 232          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
 233          */
 234         function extractMetaDataFromArticle () {
 235                 global $wgUseMetadataEdit, $wgMetadataWhitelist, $wgContLang;
 236                 $this->mMetaData = '';
 237                 if ( !$wgUseMetadataEdit ) return;
 238                 if ( $wgMetadataWhitelist == '' ) return;
 239                 $s = '';
 240                 $t = $this->getContent();
 241
 242                 # MISSING : <nowiki> filtering
 243
 244                 # Categories and language links
 245                 $t = explode ( "\n" , $t );
 246                 $catlow = strtolower ( $wgContLang->getNsText( NS_CATEGORY ) );
 247                 $cat = $ll = array();
 248                 foreach ( $t AS $key => $x ) {
 249                         $y = trim ( strtolower ( $x ) );
 250                         while ( substr ( $y , 0 , 2 ) == '[[' ) {
 251                                 $y = explode ( ']]' , trim ( $x ) );
 252                                 $first = array_shift ( $y );
 253                                 $first = explode ( ':' , $first );
 254                                 $ns = array_shift ( $first );
 255                                 $ns = trim ( str_replace ( '[' , '' , $ns ) );
 256                                 if ( $wgContLang->getLanguageName( $ns ) || strtolower ( $ns ) == $catlow ) {
 257                                         $add = '[[' . $ns . ':' . implode ( ':' , $first ) . ']]';
 258                                         if ( strtolower ( $ns ) == $catlow ) $cat[] = $add;
 259                                         else $ll[] = $add;
 260                                         $x = implode ( ']]' , $y );
 261                                         $t[$key] = $x;
 262                                         $y = trim ( strtolower ( $x ) );
 263                                 } else {
 264                                         $x = implode ( ']]' , $y );
 265                                         $y = trim ( strtolower ( $x ) );
 266                                 }
 267                         }
 268                 }
 269                 if ( count ( $cat ) ) $s .= implode ( ' ' , $cat ) . "\n";
 270                 if ( count ( $ll ) ) $s .= implode ( ' ' , $ll ) . "\n";
 271                 $t = implode ( "\n" , $t );
 272
 273                 # Load whitelist
 274                 $sat = array () ; # stand-alone-templates; must be lowercase
 275                 $wl_title = Title::newFromText ( $wgMetadataWhitelist );
 276                 $wl_article = new Article ( $wl_title );
 277                 $wl = explode ( "\n" , $wl_article->getContent() );
 278                 foreach ( $wl AS $x ) {
 279                         $isentry = false;
 280                         $x = trim ( $x );
 281                         while ( substr ( $x , 0 , 1 ) == '*' ) {
 282                                 $isentry = true;
 283                                 $x = trim ( substr ( $x , 1 ) );
 284                         }
 285                         if ( $isentry ) {
 286                                 $sat[] = strtolower ( $x );
 287                         }
 288
 289                 }
 290
 291                 # Templates, but only some
 292                 $t = explode ( '{{' , $t );
 293                 $tl = array () ;
 294                 foreach ( $t AS $key => $x ) {
 295                         $y = explode ( '}}' , $x , 2 );
 296                         if ( count ( $y ) == 2 ) {
 297                                 $z = $y[0];
 298                                 $z = explode ( '|' , $z );
 299                                 $tn = array_shift ( $z );
 300                                 if ( in_array ( strtolower ( $tn ) , $sat ) ) {
 301                                         $tl[] = '{{' . $y[0] . '}}';
 302                                         $t[$key] = $y[1];
 303                                         $y = explode ( '}}' , $y[1] , 2 );
 304                                 }
 305                                 else $t[$key] = '{{' . $x;
 306                         }
 307                         else if ( $key != 0 ) $t[$key] = '{{' . $x;
 308                         else $t[$key] = $x;
 309                 }
 310                 if ( count ( $tl ) ) $s .= implode ( ' ' , $tl );
 311                 $t = implode ( '' , $t );
 312
 313                 $t = str_replace ( "\n\n\n" , "\n" , $t );
 314                 $this->mArticle->mContent = $t;
 315                 $this->mMetaData = $s;
 316         }
 317
 318         /*
 319          * Check if a page was deleted while the user was editing it, before submit.
 320          * Note that we rely on the logging table, which hasn't been always there,
 321          * but that doesn't matter, because this only applies to brand new
 322          * deletes.
 323          */
 324         protected function wasDeletedSinceLastEdit() {
 325                 if ( $this->deletedSinceEdit )
 326                         return true;
 327                 if ( $this->mTitle->isDeleted() ) {
 328                         $this->lastDelete = $this->getLastDelete();
 329                         if ( $this->lastDelete ) {
 330                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
 331                                 if ( $deleteTime > $this->starttime ) {
 332                                         $this->deletedSinceEdit = true;
 333                                 }
 334                         }
 335                 }
 336                 return $this->deletedSinceEdit;
 337         }
 338
 339         function submit() {
 340                 $this->edit();
 341         }
 342
 343         /**
 344          * This is the function that gets called for "action=edit". It
 345          * sets up various member variables, then passes execution to
 346          * another function, usually showEditForm()
 347          *
 348          * The edit form is self-submitting, so that when things like
 349          * preview and edit conflicts occur, we get the same form back
 350          * with the extra stuff added.  Only when the final submission
 351          * is made and all is well do we actually save and redirect to
 352          * the newly-edited page.
 353          */
 354         function edit() {
 355                 global $wgOut, $wgUser, $wgRequest;
 356                 // Allow extensions to modify/prevent this form or submission
 357                 if ( !wfRunHooks( 'AlternateEdit', array( &$this ) ) ) {
 358                         return;
 359                 }
 360
 361                 wfProfileIn( __METHOD__ );
 362                 wfDebug( __METHOD__.": enter\n" );
 363
 364                 // This is not an article
 365                 $wgOut->setArticleFlag( false );
 366
 367                 $this->importFormData( $wgRequest );
 368                 $this->firsttime = false;
 369
 370                 if ( $this->live ) {
 371                         $this->livePreview();
 372                         wfProfileOut( __METHOD__ );
 373                         return;
 374                 }
 375
 376                 if ( wfReadOnly() && $this->save ) {
 377                                 // Force preview
 378                                 $this->save = false;
 379                                 $this->preview = true;
 380                 }
 381
 382                 $wgOut->addScriptFile( 'edit.js' );
 383                 $permErrors = $this->getEditPermissionErrors();
 384                 if ( $permErrors ) {
 385                         wfDebug( __METHOD__.": User can't edit\n" );
 386                         $this->readOnlyPage( $this->getContent(), true, $permErrors, 'edit' );
 387                         wfProfileOut( __METHOD__ );
 388                         return;
 389                 } else {
 390                         if ( $this->save ) {
 391                                 $this->formtype = 'save';
 392                         } else if ( $this->preview ) {
 393                                 $this->formtype = 'preview';
 394                         } else if ( $this->diff ) {
 395                                 $this->formtype = 'diff';
 396                         } else { # First time through
 397                                 $this->firsttime = true;
 398                                 if ( $this->previewOnOpen() ) {
 399                                         $this->formtype = 'preview';
 400                                 } else {
 401                                         $this->extractMetaDataFromArticle () ;
 402                                         $this->formtype = 'initial';
 403                                 }
 404                         }
 405                 }
 406
 407                 wfProfileIn( __METHOD__."-business-end" );
 408
 409                 $this->isConflict = false;
 410                 // css / js subpages of user pages get a special treatment
 411                 $this->isCssJsSubpage      = $this->mTitle->isCssJsSubpage();
 412                 $this->isValidCssJsSubpage = $this->mTitle->isValidCssJsSubpage();
 413
 414                 # Show applicable editing introductions
 415                 if ( $this->formtype == 'initial' || $this->firsttime )
 416                         $this->showIntro();
 417
 418                 if ( $this->mTitle->isTalkPage() ) {
 419                         $wgOut->addWikiMsg( 'talkpagetext' );
 420                 }
 421
 422                 # Optional notices on a per-namespace and per-page basis
 423                 $editnotice_ns   = 'editnotice-'.$this->mTitle->getNamespace();
 424                 $editnotice_page = $editnotice_ns.'-'.$this->mTitle->getDBkey();
 425                 if ( !wfEmptyMsg( $editnotice_ns, wfMsgForContent( $editnotice_ns ) ) ) {
 426                         $wgOut->addWikiText( wfMsgForContent( $editnotice_ns )  );
 427                 }
 428                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
 429                         $parts = explode( '/', $this->mTitle->getDBkey() );
 430                         $editnotice_base = $editnotice_ns;
 431                         while ( count( $parts ) > 0 ) {
 432                                 $editnotice_base .= '-'.array_shift( $parts );
 433                                 if ( !wfEmptyMsg( $editnotice_base, wfMsgForContent( $editnotice_base ) ) ) {
 434                                         $wgOut->addWikiText( wfMsgForContent( $editnotice_base )  );
 435                                 }
 436                         }
 437                 } else if ( !wfEmptyMsg( $editnotice_page, wfMsgForContent( $editnotice_page ) ) ) {
 438                         $wgOut->addWikiText( wfMsgForContent( $editnotice_page ) );
 439                 }
 440
 441                 # Attempt submission here.  This will check for edit conflicts,
 442                 # and redundantly check for locked database, blocked IPs, etc.
 443                 # that edit() already checked just in case someone tries to sneak
 444                 # in the back door with a hand-edited submission URL.
 445
 446                 if ( 'save' == $this->formtype ) {
 447                         if ( !$this->attemptSave() ) {
 448                                 wfProfileOut( __METHOD__."-business-end" );
 449                                 wfProfileOut( __METHOD__ );
 450                                 return;
 451                         }
 452                 }
 453
 454                 # First time through: get contents, set time for conflict
 455                 # checking, etc.
 456                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 457                         if ( $this->initialiseForm() === false) {
 458                                 $this->noSuchSectionPage();
 459                                 wfProfileOut( __METHOD__."-business-end" );
 460                                 wfProfileOut( __METHOD__ );
 461                                 return;
 462                         }
 463                         if ( !$this->mTitle->getArticleId() )
 464                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 465                 }
 466
 467                 $this->showEditForm();
 468                 wfProfileOut( __METHOD__."-business-end" );
 469                 wfProfileOut( __METHOD__ );
 470         }
 471
 472         protected function getEditPermissionErrors() {
 473                 global $wgUser;
 474                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 475                 # Can this title be created?
 476                 if ( !$this->mTitle->exists() ) {
 477                         $permErrors = array_merge( $permErrors,
 478                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 479                 }
 480                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 481                 $remove = array();
 482                 foreach( $permErrors as $error ) {
 483                         if ( ($this->preview || $this->diff) &&
 484                                 ($error[0] == 'blockedtext' || $error[0] == 'autoblockedtext') )
 485                         {
 486                                 $remove[] = $error;
 487                         }
 488                 }
 489                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 490                 return $permErrors;
 491         }
 492
 493         /**
 494          * Show a read-only error
 495          * Parameters are the same as OutputPage:readOnlyPage()
 496          * Redirect to the article page if redlink=1
 497          */
 498         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 499                 global $wgRequest, $wgOut;
 500                 if ( $wgRequest->getBool( 'redlink' ) ) {
 501                         // The edit page was reached via a red link.
 502                         // Redirect to the article page and let them click the edit tab if
 503                         // they really want a permission error.
 504                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 505                 } else {
 506                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 507                 }
 508         }
 509
 510         /**
 511          * Should we show a preview when the edit form is first shown?
 512          *
 513          * @return bool
 514          */
 515         protected function previewOnOpen() {
 516                 global $wgRequest, $wgUser;
 517                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 518                         // Explicit override from request
 519                         return true;
 520                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 521                         // Explicit override from request
 522                         return false;
 523                 } elseif ( $this->section == 'new' ) {
 524                         // Nothing *to* preview for new sections
 525                         return false;
 526                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 527                         // Standard preference behaviour
 528                         return true;
 529                 } elseif ( !$this->mTitle->exists() && $this->mTitle->getNamespace() == NS_CATEGORY ) {
 530                         // Categories are special
 531                         return true;
 532                 } else {
 533                         return false;
 534                 }
 535         }
 536
 537         /**
 538          * @todo document
 539          * @param $request
 540          */
 541         function importFormData( &$request ) {
 542                 global $wgLang, $wgUser;
 543                 $fname = 'EditPage::importFormData';
 544                 wfProfileIn( $fname );
 545
 546                 # Section edit can come from either the form or a link
 547                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 548
 549                 if ( $request->wasPosted() ) {
 550                         # These fields need to be checked for encoding.
 551                         # Also remove trailing whitespace, but don't remove _initial_
 552                         # whitespace from the text boxes. This may be significant formatting.
 553                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 554                         $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
 555                         $this->mMetaData = rtrim( $request->getText( 'metadata' ) );
 556                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 557                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary' ), 250, '' );
 558
 559                         # Remove extra headings from summaries and new sections.
 560                         $this->summary = preg_replace('/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary);
 561
 562                         $this->edittime = $request->getVal( 'wpEdittime' );
 563                         $this->starttime = $request->getVal( 'wpStarttime' );
 564
 565                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 566
 567                         if ( is_null( $this->edittime ) ) {
 568                                 # If the form is incomplete, force to preview.
 569                                 wfDebug( "$fname: Form data appears to be incomplete\n" );
 570                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 571                                 $this->preview = true;
 572                         } else {
 573                                 /* Fallback for live preview */
 574                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 575                                 $this->diff = $request->getCheck( 'wpDiff' );
 576
 577                                 // Remember whether a save was requested, so we can indicate
 578                                 // if we forced preview due to session failure.
 579                                 $this->mTriedSave = !$this->preview;
 580
 581                                 if ( $this->tokenOk( $request ) ) {
 582                                         # Some browsers will not report any submit button
 583                                         # if the user hits enter in the comment box.
 584                                         # The unmarked state will be assumed to be a save,
 585                                         # if the form seems otherwise complete.
 586                                         wfDebug( "$fname: Passed token check.\n" );
 587                                 } else if ( $this->diff ) {
 588                                         # Failed token check, but only requested "Show Changes".
 589                                         wfDebug( "$fname: Failed token check; Show Changes requested.\n" );
 590                                 } else {
 591                                         # Page might be a hack attempt posted from
 592                                         # an external site. Preview instead of saving.
 593                                         wfDebug( "$fname: Failed token check; forcing preview\n" );
 594                                         $this->preview = true;
 595                                 }
 596                         }
 597                         $this->save = !$this->preview && !$this->diff;
 598                         if ( !preg_match( '/^\d{14}$/', $this->edittime )) {
 599                                 $this->edittime = null;
 600                         }
 601
 602                         if ( !preg_match( '/^\d{14}$/', $this->starttime )) {
 603                                 $this->starttime = null;
 604                         }
 605
 606                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 607
 608                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 609                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 610
 611                         # Don't force edit summaries when a user is editing their own user or talk page
 612                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 613                                 $this->mTitle->getText() == $wgUser->getName() )
 614                         {
 615                                 $this->allowBlankSummary = true;
 616                         } else {
 617                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary');
 618                         }
 619
 620                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 621                 } else {
 622                         # Not a posted form? Start with nothing.
 623                         wfDebug( "$fname: Not a posted form.\n" );
 624                         $this->textbox1  = '';
 625                         $this->textbox2  = '';
 626                         $this->mMetaData = '';
 627                         $this->summary   = '';
 628                         $this->edittime  = '';
 629                         $this->starttime = wfTimestampNow();
 630                         $this->edit      = false;
 631                         $this->preview   = false;
 632                         $this->save      = false;
 633                         $this->diff      = false;
 634                         $this->minoredit = false;
 635                         $this->watchthis = false;
 636                         $this->recreate  = false;
 637
 638                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 639                                 $this->summary = $request->getVal( 'preloadtitle' );
 640                         }
 641                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 642                                 $this->summary = $request->getText( 'summary' );
 643                         }
 644
 645                         if ( $request->getVal( 'minor' ) ) {
 646                                 $this->minoredit = true;
 647                         }
 648                 }
 649
 650                 $this->oldid = $request->getInt( 'oldid' );
 651
 652                 $this->live = $request->getCheck( 'live' );
 653                 $this->editintro = $request->getText( 'editintro' );
 654
 655                 wfProfileOut( $fname );
 656         }
 657
 658         /**
 659          * Make sure the form isn't faking a user's credentials.
 660          *
 661          * @param $request WebRequest
 662          * @return bool
 663          * @private
 664          */
 665         function tokenOk( &$request ) {
 666                 global $wgUser;
 667                 $token = $request->getVal( 'wpEditToken' );
 668                 $this->mTokenOk = $wgUser->matchEditToken( $token );
 669                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
 670                 return $this->mTokenOk;
 671         }
 672
 673         /**
 674          * Show all applicable editing introductions
 675          */
 676         protected function showIntro() {
 677                 global $wgOut, $wgUser;
 678                 if ( $this->suppressIntro ) {
 679                         return;
 680                 }
 681
 682                 $namespace = $this->mTitle->getNamespace();
 683
 684                 if ( $namespace == NS_MEDIAWIKI ) {
 685                         # Show a warning if editing an interface message
 686                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1</div>", 'editinginterface' );
 687                 }
 688
 689                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exists
 690                 if ( $namespace == NS_USER || $namespace == 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->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n", 'rev-deleted-text-permission' );
1195                                 } else if ( $this->mArticle->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1196                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n", 'rev-deleted-text-view' );
1197                                 }
1198
1199                                 if ( !$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                 } elseif ( $this->mTitle->isProtected( 'edit' ) ) {
1226                         # Is the title semi-protected?
1227                         if ( $this->mTitle->isSemiProtected() ) {
1228                                 $noticeMsg = 'semiprotectedpagewarning';
1229                                 $classes[] = 'mw-textarea-sprotected';
1230                         } else {
1231                                 # Then it must be protected based on static groups (regular)
1232                                 $noticeMsg = 'protectedpagewarning';
1233                                 $classes[] = 'mw-textarea-protected';
1234                         }
1235                         $wgOut->addHTML( "<div class='mw-warning-with-logexcerpt'>\n" );
1236                         $wgOut->addWikiMsg( $noticeMsg );
1237                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle->getPrefixedText(), '', 1 );
1238                         $wgOut->addHTML( "</div>\n" );
1239                 }
1240                 if ( $this->mTitle->isCascadeProtected() ) {
1241                         # Is this page under cascading protection from some source pages?
1242                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
1243                         $notice = "<div class='mw-cascadeprotectedwarning'>$1\n";
1244                         $cascadeSourcesCount = count( $cascadeSources );
1245                         if ( $cascadeSourcesCount > 0 ) {
1246                                 # Explain, and list the titles responsible
1247                                 foreach( $cascadeSources as $page ) {
1248                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
1249                                 }
1250                         }
1251                         $notice .= '</div>';
1252                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
1253                 }
1254                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
1255                         $wgOut->wrapWikiMsg( '<div class="mw-titleprotectedwarning">$1</div>', '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                 $separator = wfMsgExt( 'pipe-separator' , 'escapenoentities' );
1281                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ));
1282                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
1283                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
1284                         htmlspecialchars( wfMsg( 'newwindow' ) );
1285
1286                 global $wgRightsText;
1287                 if ( $wgRightsText ) {
1288                         $copywarnMsg = array( 'copyrightwarning',
1289                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
1290                                 $wgRightsText );
1291                 } else {
1292                         $copywarnMsg = array( 'copyrightwarning2',
1293                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
1294                 }
1295
1296                 if ( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
1297                         # prepare toolbar for edit buttons
1298                         $toolbar = EditPage::getEditToolbar();
1299                 } else {
1300                         $toolbar = '';
1301                 }
1302
1303                 // activate checkboxes if user wants them to be always active
1304                 if ( !$this->preview && !$this->diff ) {
1305                         # Sort out the "watch" checkbox
1306                         if ( $wgUser->getOption( 'watchdefault' ) ) {
1307                                 # Watch all edits
1308                                 $this->watchthis = true;
1309                         } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1310                                 # Watch creations
1311                                 $this->watchthis = true;
1312                         } elseif ( $this->mTitle->userIsWatching() ) {
1313                                 # Already watched
1314                                 $this->watchthis = true;
1315                         }
1316
1317                         # May be overriden by request parameters
1318                         if( $wgRequest->getBool( 'watchthis' ) ) {
1319                                 $this->watchthis = true;
1320                         }
1321
1322                         if ( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
1323                 }
1324
1325                 $wgOut->addHTML( $this->editFormPageTop );
1326
1327                 if ( $wgUser->getOption( 'previewontop' ) ) {
1328                         $this->displayPreviewArea( $previewOutput, true );
1329                 }
1330
1331
1332                 $wgOut->addHTML( $this->editFormTextTop );
1333
1334                 # if this is a comment, show a subject line at the top, which is also the edit summary.
1335                 # Otherwise, show a summary field at the bottom
1336                 $summarytext = $wgContLang->recodeForEdit( $this->summary );
1337
1338                 # If a blank edit summary was previously provided, and the appropriate
1339                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1340                 # user being bounced back more than once in the event that a summary
1341                 # is not required.
1342                 #####
1343                 # For a bit more sophisticated detection of blank summaries, hash the
1344                 # automatic one and pass that in the hidden field wpAutoSummary.
1345                 $summaryhiddens =  '';
1346                 if ( $this->missingSummary ) $summaryhiddens .= Xml::hidden( 'wpIgnoreBlankSummary', true );
1347                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1348                 $summaryhiddens .= Xml::hidden( 'wpAutoSummary', $autosumm );
1349                 if ( $this->section == 'new' ) {
1350                         $commentsubject = '';
1351                         if ( !$wgRequest->getBool( 'nosummary' ) ) {
1352                                 # Add an ID if 'missingsummary' is triggered to allow styling of the summary line
1353                                 $summaryMissedID = $this->missingSummary ? ' mw-summarymissed' : '';
1354
1355                                 $commentsubject =
1356                                         Xml::tags( 'label', array( 'for' => 'wpSummary' ), $subject );
1357                                 $commentsubject =
1358                                         Xml::tags( 'span', array( 'id' => "wpSummaryLabel$summaryMissedID" ), $commentsubject );
1359                                 $commentsubject .= '&nbsp;';
1360                                 $commentsubject .= Xml::input( 'wpSummary',
1361                                                                         60,
1362                                                                         $summarytext,
1363                                                                         array(
1364                                                                                 'id' => 'wpSummary',
1365                                                                                 'maxlength' => '200',
1366                                                                                 'tabindex' => '1'
1367                                                                         ) );
1368                         }
1369                         $editsummary = "<div class='editOptions'>\n";
1370                         global $wgParser;
1371                         $formattedSummary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $this->summary ) );
1372                         $subjectpreview = $summarytext && $this->preview ? "<div class=\"mw-summary-preview\">". wfMsg('subject-preview') . $sk->commentBlock( $formattedSummary, $this->mTitle, true )."</div>\n" : '';
1373                         $summarypreview = '';
1374                 } else {
1375                         $commentsubject = '';
1376
1377                         # Add an ID if 'missingsummary' is triggered to allow styling of the summary line
1378                         $summaryMissedID = $this->missingSummary ? ' mw-summarymissed' : '';
1379
1380                         $editsummary = Xml::tags( 'label', array( 'for' => 'wpSummary' ), $summary );
1381                         $editsummary = Xml::tags( 'span', array( 'id' => "wpSummaryLabel$summaryMissedID" ), $editsummary ) . ' ';
1382
1383                         $editsummary .= Xml::input( 'wpSummary',
1384                                 60,
1385                                 $summarytext,
1386                                 array(
1387                                         'id' => 'wpSummary',
1388                                         'maxlength' => '200',
1389                                         'tabindex' => '1'
1390                                 ) );
1391
1392                         // No idea where this is closed.
1393                         $editsummary = Xml::openElement( 'div', array( 'class' => 'editOptions' ) )
1394                                                         . $editsummary . '<br/>';
1395
1396                         $summarypreview = '';
1397                         if ( $summarytext && $this->preview ) {
1398                                 $summarypreview =
1399                                         Xml::tags( 'div',
1400                                                 array( 'class' => 'mw-summary-preview' ),
1401                                                 wfMsg( 'summary-preview' ) .
1402                                                         $sk->commentBlock( $this->summary, $this->mTitle )
1403                                         );
1404                         }
1405                         $subjectpreview = '';
1406                 }
1407                 $commentsubject .= $summaryhiddens;
1408
1409                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
1410                 if ( !$this->preview && !$this->diff ) {
1411                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
1412                 }
1413                 $templates = $this->getTemplates();
1414                 $formattedtemplates = $sk->formatTemplates( $templates, $this->preview, $this->section != '');
1415
1416                 $hiddencats = $this->mArticle->getHiddenCategories();
1417                 $formattedhiddencats = $sk->formatHiddenCategories( $hiddencats );
1418
1419                 global $wgUseMetadataEdit ;
1420                 if ( $wgUseMetadataEdit ) {
1421                         $metadata = $this->mMetaData ;
1422                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
1423                         $top = wfMsgWikiHtml( 'metadata_help' );
1424                         /* ToDo: Replace with clean code */
1425                         $ew = $wgUser->getOption( 'editwidth' );
1426                         if ( $ew ) $ew = " style=\"width:100%\"";
1427                         else $ew = '';
1428                         $cols = $wgUser->getIntOption( 'cols' );
1429                         /* /ToDo */
1430                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
1431                 }
1432                 else $metadata = "" ;
1433
1434                 $recreate = '';
1435                 if ( $this->wasDeletedSinceLastEdit() ) {
1436                         if ( 'save' != $this->formtype ) {
1437                                 $wgOut->wrapWikiMsg(
1438                                         '<div class="error mw-deleted-while-editing">$1</div>',
1439                                         'deletedwhileediting' );
1440                         } else {
1441                                 // Hide the toolbar and edit area, user can click preview to get it back
1442                                 // Add an confirmation checkbox and explanation.
1443                                 $toolbar = '';
1444                                 $recreate = '<div class="mw-confirm-recreate">' .
1445                                                 $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ) ) .
1446                                                 Xml::checkLabel( wfMsg( 'recreate' ), 'wpRecreate', 'wpRecreate', false,
1447                                                         array( 'title' => $sk->titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
1448                                                 ) . '</div>';
1449                         }
1450                 }
1451
1452                 $tabindex = 2;
1453
1454                 $checkboxes = $this->getCheckboxes( $tabindex, $sk,
1455                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
1456
1457                 $checkboxhtml = implode( $checkboxes, "\n" );
1458
1459                 $buttons = $this->getEditButtons( $tabindex );
1460                 $buttonshtml = implode( $buttons, "\n" );
1461
1462                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
1463                         ? '' : Xml::hidden( 'safemode', '1' );
1464
1465                 $wgOut->addHTML( <<<END
1466 {$toolbar}
1467 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1468 END
1469 );
1470
1471                 if ( is_callable( $formCallback ) ) {
1472                         call_user_func_array( $formCallback, array( &$wgOut ) );
1473                 }
1474
1475                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1476
1477                 // Put these up at the top to ensure they aren't lost on early form submission
1478                 $this->showFormBeforeText();
1479
1480                 $wgOut->addHTML( <<<END
1481 {$recreate}
1482 {$commentsubject}
1483 {$subjectpreview}
1484 {$this->editFormTextBeforeContent}
1485 END
1486 );
1487                 $this->showTextbox1( $classes );
1488
1489                 $wgOut->wrapWikiMsg( "<div id=\"editpage-copywarn\">\n$1\n</div>", $copywarnMsg );
1490                 $wgOut->addHTML( <<<END
1491 {$this->editFormTextAfterWarn}
1492 {$metadata}
1493 {$editsummary}
1494 {$summarypreview}
1495 {$checkboxhtml}
1496 {$safemodehtml}
1497 END
1498 );
1499
1500                 $wgOut->addHTML(
1501 "<div class='editButtons'>
1502 {$buttonshtml}
1503         <span class='editHelp'>{$cancel}{$separator}{$edithelp}</span>
1504 </div><!-- editButtons -->
1505 </div><!-- editOptions -->");
1506
1507                 /**
1508                  * To make it harder for someone to slip a user a page
1509                  * which submits an edit form to the wiki without their
1510                  * knowledge, a random token is associated with the login
1511                  * session. If it's not passed back with the submission,
1512                  * we won't save the page, or render user JavaScript and
1513                  * CSS previews.
1514                  *
1515                  * For anon editors, who may not have a session, we just
1516                  * include the constant suffix to prevent editing from
1517                  * broken text-mangling proxies.
1518                  */
1519                 $token = htmlspecialchars( $wgUser->editToken() );
1520                 $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
1521
1522                 $this->showEditTools();
1523
1524                 $wgOut->addHTML( <<<END
1525 {$this->editFormTextAfterTools}
1526 <div class='templatesUsed'>
1527 {$formattedtemplates}
1528 </div>
1529 <div class='hiddencats'>
1530 {$formattedhiddencats}
1531 </div>
1532 END
1533 );
1534
1535                 if ( $this->isConflict && wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
1536                         $wgOut->wrapWikiMsg( '==$1==', "yourdiff" );
1537
1538                         $de = new DifferenceEngine( $this->mTitle );
1539                         $de->setText( $this->textbox2, $this->textbox1 );
1540                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1541
1542                         $wgOut->wrapWikiMsg( '==$1==', "yourtext" );
1543                         $this->showTextbox2();
1544                 }
1545                 $wgOut->addHTML( $this->editFormTextBottom );
1546                 $wgOut->addHTML( "</form>\n" );
1547                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1548                         $this->displayPreviewArea( $previewOutput, false );
1549                 }
1550
1551                 wfProfileOut( $fname );
1552         }
1553
1554         protected function showFormBeforeText() {
1555                 global $wgOut;
1556                 $wgOut->addHTML( "
1557 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
1558 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
1559 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
1560 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
1561         }
1562
1563         protected function showTextbox1( $classes ) {
1564                 $attribs = array( 'tabindex' => 1 );
1565
1566                 if ( $this->wasDeletedSinceLastEdit() )
1567                         $attribs['type'] = 'hidden';
1568                 if ( !empty($classes) )
1569                         $attribs['class'] = implode(' ',$classes);
1570
1571                 $this->showTextbox( $this->textbox1, 'wpTextbox1', $attribs );
1572         }
1573
1574         protected function showTextbox2() {
1575                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6 ) );
1576         }
1577
1578         protected function showTextbox( $content, $name, $attribs = array() ) {
1579                 global $wgOut, $wgUser;
1580
1581                 $wikitext = $this->safeUnicodeOutput( $content );
1582                 if ( $wikitext !== '' ) {
1583                         // Ensure there's a newline at the end, otherwise adding lines
1584                         // is awkward.
1585                         // But don't add a newline if the ext is empty, or Firefox in XHTML
1586                         // mode will show an extra newline. A bit annoying.
1587                         $wikitext .= "\n";
1588                 }
1589
1590                 $attribs['accesskey'] = ',';
1591                 $attribs['id'] = $name;
1592
1593                 if ( $wgUser->getOption( 'editwidth' ) )
1594                         $attribs['style'] = 'width: 100%';
1595
1596                 $wgOut->addHTML( Xml::textarea(
1597                         $name,
1598                         $wikitext,
1599                         $wgUser->getIntOption( 'cols' ), $wgUser->getIntOption( 'rows' ),
1600                         $attribs ) );
1601         }
1602
1603         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
1604                 global $wgOut;
1605                 $classes = array();
1606                 if ( $isOnTop )
1607                         $classes[] = 'ontop';
1608
1609                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
1610
1611                 if ( $this->formtype != 'preview' )
1612                         $attribs['style'] = 'display: none;';
1613
1614                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
1615
1616                 if ( $this->formtype == 'preview' ) {
1617                         $this->showPreview( $previewOutput );
1618                 }
1619
1620                 $wgOut->addHTML( '</div>' );
1621
1622                 if ( $this->formtype == 'diff') {
1623                         $this->showDiff();
1624                 }
1625         }
1626
1627         /**
1628          * Append preview output to $wgOut.
1629          * Includes category rendering if this is a category page.
1630          *
1631          * @param string $text The HTML to be output for the preview.
1632          */
1633         protected function showPreview( $text ) {
1634                 global $wgOut;
1635                 if ( $this->mTitle->getNamespace() == NS_CATEGORY) {
1636                         $this->mArticle->openShowCategory();
1637                 }
1638                 # This hook seems slightly odd here, but makes things more
1639                 # consistent for extensions.
1640                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
1641                 $wgOut->addHTML( $text );
1642                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
1643                         $this->mArticle->closeShowCategory();
1644                 }
1645         }
1646
1647         /**
1648          * Live Preview lets us fetch rendered preview page content and
1649          * add it to the page without refreshing the whole page.
1650          * If not supported by the browser it will fall through to the normal form
1651          * submission method.
1652          *
1653          * This function outputs a script tag to support live preview, and
1654          * returns an onclick handler which should be added to the attributes
1655          * of the preview button
1656          */
1657         function doLivePreviewScript() {
1658                 global $wgOut, $wgTitle;
1659                 $wgOut->addScriptFile( 'preview.js' );
1660                 $liveAction = $wgTitle->getLocalUrl( "action={$this->action}&wpPreview=true&live=true" );
1661                 return "return !lpDoPreview(" .
1662                         "editform.wpTextbox1.value," .
1663                         '"' . $liveAction . '"' . ")";
1664         }
1665
1666         protected function showEditTools() {
1667                 global $wgOut;
1668                 $wgOut->addHTML( '<div class="mw-editTools">' );
1669                 $wgOut->addWikiMsgArray( 'edittools', array(), array( 'content' ) );
1670                 $wgOut->addHTML( '</div>' );
1671         }
1672
1673         function getLastDelete() {
1674                 $dbr = wfGetDB( DB_SLAVE );
1675                 $data = $dbr->selectRow(
1676                         array( 'logging', 'user' ),
1677                         array( 'log_type',
1678                                'log_action',
1679                                'log_timestamp',
1680                                'log_user',
1681                                'log_namespace',
1682                                'log_title',
1683                                'log_comment',
1684                                'log_params',
1685                                'user_name', ),
1686                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1687                                'log_title' => $this->mTitle->getDBkey(),
1688                                'log_type' => 'delete',
1689                                'log_action' => 'delete',
1690                                'user_id=log_user' ),
1691                         __METHOD__,
1692                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
1693
1694                 return $data;
1695         }
1696
1697         /**
1698          * Get the rendered text for previewing.
1699          * @return string
1700          */
1701         function getPreviewText() {
1702                 global $wgOut, $wgUser, $wgTitle, $wgParser, $wgLang, $wgContLang, $wgMessageCache;
1703
1704                 wfProfileIn( __METHOD__ );
1705
1706                 if ( $this->mTriedSave && !$this->mTokenOk ) {
1707                         if ( $this->mTokenOkExceptSuffix ) {
1708                                 $note = wfMsg( 'token_suffix_mismatch' );
1709                         } else {
1710                                 $note = wfMsg( 'session_fail_preview' );
1711                         }
1712                 } else {
1713                         $note = wfMsg( 'previewnote' );
1714                 }
1715
1716                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1717                 $parserOptions->setEditSection( false );
1718                 $parserOptions->setIsPreview( true );
1719                 $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
1720
1721                 global $wgRawHtml;
1722                 if ( $wgRawHtml && !$this->mTokenOk ) {
1723                         // Could be an offsite preview attempt. This is very unsafe if
1724                         // HTML is enabled, as it could be an attack.
1725                         return $wgOut->parse( "<div class='previewnote'>" .
1726                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1727                 }
1728
1729                 # don't parse user css/js, show message about preview
1730                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1731
1732                 if ( $this->isCssJsSubpage ) {
1733                         if (preg_match("/\\.css$/", $this->mTitle->getText() ) ) {
1734                                 $previewtext = wfMsg('usercsspreview');
1735                         } else if (preg_match("/\\.js$/", $this->mTitle->getText() ) ) {
1736                                 $previewtext = wfMsg('userjspreview');
1737                         }
1738                         $parserOptions->setTidy(true);
1739                         $parserOutput = $wgParser->parse( $previewtext, $this->mTitle, $parserOptions );
1740                         $previewHTML = $parserOutput->mText;
1741                 } elseif ( $rt = Title::newFromRedirectArray( $this->textbox1 ) ) {
1742                         $previewHTML = $this->mArticle->viewRedirect( $rt, false );
1743                 } else {
1744                         $toparse = $this->textbox1;
1745
1746                         # If we're adding a comment, we need to show the
1747                         # summary as the headline
1748                         if ( $this->section=="new" && $this->summary!="" ) {
1749                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1750                         }
1751
1752                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData;
1753
1754                         // Parse mediawiki messages with correct target language
1755                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1756                                 list( /* $unused */, $lang ) = $wgMessageCache->figureMessage( $this->mTitle->getText() );
1757                                 $obj = wfGetLangObj( $lang );
1758                                 $parserOptions->setTargetLanguage( $obj );
1759                         }
1760
1761
1762                         $parserOptions->setTidy(true);
1763                         $parserOptions->enableLimitReport();
1764                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ),
1765                                         $this->mTitle, $parserOptions );
1766
1767                         $previewHTML = $parserOutput->getText();
1768                         $this->mParserOutput = $parserOutput;
1769                         $wgOut->addParserOutputNoText( $parserOutput );
1770
1771                         if ( count( $parserOutput->getWarnings() ) ) {
1772                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
1773                         }
1774                 }
1775
1776                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
1777                         "<div class='previewnote'>" . $wgOut->parse( $note ) . "</div>\n";
1778                 if ( $this->isConflict ) {
1779                         $previewhead .='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1780                 }
1781
1782                 wfProfileOut( __METHOD__ );
1783                 return $previewhead . $previewHTML;
1784         }
1785
1786         function getTemplates() {
1787                 if ( $this->preview || $this->section != '' ) {
1788                         $templates = array();
1789                         if ( !isset($this->mParserOutput) ) return $templates;
1790                         foreach( $this->mParserOutput->getTemplates() as $ns => $template) {
1791                                 foreach( array_keys( $template ) as $dbk ) {
1792                                         $templates[] = Title::makeTitle($ns, $dbk);
1793                                 }
1794                         }
1795                         return $templates;
1796                 } else {
1797                         return $this->mArticle->getUsedTemplates();
1798                 }
1799         }
1800
1801         /**
1802          * Call the stock "user is blocked" page
1803          */
1804         function blockedPage() {
1805                 global $wgOut, $wgUser;
1806                 $wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
1807
1808                 # If the user made changes, preserve them when showing the markup
1809                 # (This happens when a user is blocked during edit, for instance)
1810                 $first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
1811                 if ( $first ) {
1812                         $source = $this->mTitle->exists() ? $this->getContent() : false;
1813                 } else {
1814                         $source = $this->textbox1;
1815                 }
1816
1817                 # Spit out the source or the user's modified version
1818                 if ( $source !== false ) {
1819                         $rows = $wgUser->getIntOption( 'rows' );
1820                         $cols = $wgUser->getIntOption( 'cols' );
1821                         $attribs = array( 'id' => 'wpTextbox1', 'name' => 'wpTextbox1', 'cols' => $cols, 'rows' => $rows, 'readonly' => 'readonly' );
1822                         $wgOut->addHTML( '<hr />' );
1823                         $wgOut->addWikiMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() );
1824                         # Why we don't use Xml::element here?
1825                         # Is it because if $source is '', it returns <textarea />?
1826                         $wgOut->addHTML( Xml::openElement( 'textarea', $attribs ) . htmlspecialchars( $source ) . Xml::closeElement( 'textarea' ) );
1827                 }
1828         }
1829
1830         /**
1831          * Produce the stock "please login to edit pages" page
1832          */
1833         function userNotLoggedInPage() {
1834                 global $wgUser, $wgOut, $wgTitle;
1835                 $skin = $wgUser->getSkin();
1836
1837                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1838                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $wgTitle->getPrefixedUrl() );
1839
1840                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1841                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1842                 $wgOut->setArticleRelated( false );
1843
1844                 $wgOut->addHTML( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
1845                 $wgOut->returnToMain( false, $wgTitle );
1846         }
1847
1848         /**
1849          * Creates a basic error page which informs the user that
1850          * they have attempted to edit a nonexistent section.
1851          */
1852         function noSuchSectionPage() {
1853                 global $wgOut, $wgTitle;
1854
1855                 $wgOut->setPageTitle( wfMsg( 'nosuchsectiontitle' ) );
1856                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1857                 $wgOut->setArticleRelated( false );
1858
1859                 $wgOut->addWikiMsg( 'nosuchsectiontext', $this->section );
1860                 $wgOut->returnToMain( false, $wgTitle );
1861         }
1862
1863         /**
1864          * Produce the stock "your edit contains spam" page
1865          *
1866          * @param $match Text which triggered one or more filters
1867          */
1868         function spamPage( $match = false ) {
1869                 global $wgOut, $wgTitle;
1870
1871                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1872                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1873                 $wgOut->setArticleRelated( false );
1874
1875                 $wgOut->addHTML( '<div id="spamprotected">' );
1876                 $wgOut->addWikiMsg( 'spamprotectiontext' );
1877                 if ( $match )
1878                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
1879                 $wgOut->addHTML( '</div>' );
1880
1881                 $wgOut->returnToMain( false, $wgTitle );
1882         }
1883
1884         /**
1885          * @private
1886          * @todo document
1887          */
1888         function mergeChangesInto( &$editText ){
1889                 $fname = 'EditPage::mergeChangesInto';
1890                 wfProfileIn( $fname );
1891
1892                 $db = wfGetDB( DB_MASTER );
1893
1894                 // This is the revision the editor started from
1895                 $baseRevision = $this->getBaseRevision();
1896                 if ( is_null( $baseRevision ) ) {
1897                         wfProfileOut( $fname );
1898                         return false;
1899                 }
1900                 $baseText = $baseRevision->getText();
1901
1902                 // The current state, we want to merge updates into it
1903                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1904                 if ( is_null( $currentRevision ) ) {
1905                         wfProfileOut( $fname );
1906                         return false;
1907                 }
1908                 $currentText = $currentRevision->getText();
1909
1910                 $result = '';
1911                 if ( wfMerge( $baseText, $editText, $currentText, $result ) ) {
1912                         $editText = $result;
1913                         wfProfileOut( $fname );
1914                         return true;
1915                 } else {
1916                         wfProfileOut( $fname );
1917                         return false;
1918                 }
1919         }
1920
1921         /**
1922          * Check if the browser is on a blacklist of user-agents known to
1923          * mangle UTF-8 data on form submission. Returns true if Unicode
1924          * should make it through, false if it's known to be a problem.
1925          * @return bool
1926          * @private
1927          */
1928         function checkUnicodeCompliantBrowser() {
1929                 global $wgBrowserBlackList;
1930                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
1931                         // No User-Agent header sent? Trust it by default...
1932                         return true;
1933                 }
1934                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1935                 foreach ( $wgBrowserBlackList as $browser ) {
1936                         if ( preg_match($browser, $currentbrowser) ) {
1937                                 return false;
1938                         }
1939                 }
1940                 return true;
1941         }
1942
1943         /**
1944          * @deprecated use $wgParser->stripSectionName()
1945          */
1946         function pseudoParseSectionAnchor( $text ) {
1947                 global $wgParser;
1948                 return $wgParser->stripSectionName( $text );
1949         }
1950
1951         /**
1952          * Format an anchor fragment as it would appear for a given section name
1953          * @param string $text
1954          * @return string
1955          * @private
1956          */
1957         function sectionAnchor( $text ) {
1958                 global $wgParser;
1959                 return $wgParser->guessSectionNameFromWikiText( $text );
1960         }
1961
1962         /**
1963          * Shows a bulletin board style toolbar for common editing functions.
1964          * It can be disabled in the user preferences.
1965          * The necessary JavaScript code can be found in skins/common/edit.js.
1966          *
1967          * @return string
1968          */
1969         static function getEditToolbar() {
1970                 global $wgStylePath, $wgContLang, $wgLang, $wgJsMimeType;
1971
1972                 /**
1973                  * toolarray an array of arrays which each include the filename of
1974                  * the button image (without path), the opening tag, the closing tag,
1975                  * and optionally a sample text that is inserted between the two when no
1976                  * selection is highlighted.
1977                  * The tip text is shown when the user moves the mouse over the button.
1978                  *
1979                  * Already here are accesskeys (key), which are not used yet until someone
1980                  * can figure out a way to make them work in IE. However, we should make
1981                  * sure these keys are not defined on the edit page.
1982                  */
1983                 $toolarray = array(
1984                         array(
1985                                 'image'  => $wgLang->getImageFile('button-bold'),
1986                                 'id'     => 'mw-editbutton-bold',
1987                                 'open'   => '\'\'\'',
1988                                 'close'  => '\'\'\'',
1989                                 'sample' => wfMsg('bold_sample'),
1990                                 'tip'    => wfMsg('bold_tip'),
1991                                 'key'    => 'B'
1992                         ),
1993                         array(
1994                                 'image'  => $wgLang->getImageFile('button-italic'),
1995                                 'id'     => 'mw-editbutton-italic',
1996                                 'open'   => '\'\'',
1997                                 'close'  => '\'\'',
1998                                 'sample' => wfMsg('italic_sample'),
1999                                 'tip'    => wfMsg('italic_tip'),
2000                                 'key'    => 'I'
2001                         ),
2002                         array(
2003                                 'image'  => $wgLang->getImageFile('button-link'),
2004                                 'id'     => 'mw-editbutton-link',
2005                                 'open'   => '[[',
2006                                 'close'  => ']]',
2007                                 'sample' => wfMsg('link_sample'),
2008                                 'tip'    => wfMsg('link_tip'),
2009                                 'key'    => 'L'
2010                         ),
2011                         array(
2012                                 'image'  => $wgLang->getImageFile('button-extlink'),
2013                                 'id'     => 'mw-editbutton-extlink',
2014                                 'open'   => '[',
2015                                 'close'  => ']',
2016                                 'sample' => wfMsg('extlink_sample'),
2017                                 'tip'    => wfMsg('extlink_tip'),
2018                                 'key'    => 'X'
2019                         ),
2020                         array(
2021                                 'image'  => $wgLang->getImageFile('button-headline'),
2022                                 'id'     => 'mw-editbutton-headline',
2023                                 'open'   => "\n== ",
2024                                 'close'  => " ==\n",
2025                                 'sample' => wfMsg('headline_sample'),
2026                                 'tip'    => wfMsg('headline_tip'),
2027                                 'key'    => 'H'
2028                         ),
2029                         array(
2030                                 'image'  => $wgLang->getImageFile('button-image'),
2031                                 'id'     => 'mw-editbutton-image',
2032                                 'open'   => '[['.$wgContLang->getNsText(NS_FILE).':',
2033                                 'close'  => ']]',
2034                                 'sample' => wfMsg('image_sample'),
2035                                 'tip'    => wfMsg('image_tip'),
2036                                 'key'    => 'D'
2037                         ),
2038                         array(
2039                                 'image'  => $wgLang->getImageFile('button-media'),
2040                                 'id'     => 'mw-editbutton-media',
2041                                 'open'   => '[['.$wgContLang->getNsText(NS_MEDIA).':',
2042                                 'close'  => ']]',
2043                                 'sample' => wfMsg('media_sample'),
2044                                 'tip'    => wfMsg('media_tip'),
2045                                 'key'    => 'M'
2046                         ),
2047                         array(
2048                                 'image'  => $wgLang->getImageFile('button-math'),
2049                                 'id'     => 'mw-editbutton-math',
2050                                 'open'   => "<math>",
2051                                 'close'  => "</math>",
2052                                 'sample' => wfMsg('math_sample'),
2053                                 'tip'    => wfMsg('math_tip'),
2054                                 'key'    => 'C'
2055                         ),
2056                         array(
2057                                 'image'  => $wgLang->getImageFile('button-nowiki'),
2058                                 'id'     => 'mw-editbutton-nowiki',
2059                                 'open'   => "<nowiki>",
2060                                 'close'  => "</nowiki>",
2061                                 'sample' => wfMsg('nowiki_sample'),
2062                                 'tip'    => wfMsg('nowiki_tip'),
2063                                 'key'    => 'N'
2064                         ),
2065                         array(
2066                                 'image'  => $wgLang->getImageFile('button-sig'),
2067                                 'id'     => 'mw-editbutton-signature',
2068                                 'open'   => '--~~~~',
2069                                 'close'  => '',
2070                                 'sample' => '',
2071                                 'tip'    => wfMsg('sig_tip'),
2072                                 'key'    => 'Y'
2073                         ),
2074                         array(
2075                                 'image'  => $wgLang->getImageFile('button-hr'),
2076                                 'id'     => 'mw-editbutton-hr',
2077                                 'open'   => "\n----\n",
2078                                 'close'  => '',
2079                                 'sample' => '',
2080                                 'tip'    => wfMsg('hr_tip'),
2081                                 'key'    => 'R'
2082                         )
2083                 );
2084                 $toolbar = "<div id='toolbar'>\n";
2085                 $toolbar.="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
2086
2087                 foreach($toolarray as $tool) {
2088                         $params = array(
2089                                 $image = $wgStylePath.'/common/images/'.$tool['image'],
2090                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
2091                                 // Older browsers show a "speedtip" type message only for ALT.
2092                                 // Ideally these should be different, realistically they
2093                                 // probably don't need to be.
2094                                 $tip = $tool['tip'],
2095                                 $open = $tool['open'],
2096                                 $close = $tool['close'],
2097                                 $sample = $tool['sample'],
2098                                 $cssId = $tool['id'],
2099                         );
2100
2101                         $paramList = implode( ',',
2102                                 array_map( array( 'Xml', 'encodeJsVar' ), $params ) );
2103                         $toolbar.="addButton($paramList);\n";
2104                 }
2105
2106                 $toolbar.="/*]]>*/\n</script>";
2107                 $toolbar.="\n</div>";
2108                 return $toolbar;
2109         }
2110
2111         /**
2112          * Returns an array of html code of the following checkboxes:
2113          * minor and watch
2114          *
2115          * @param $tabindex Current tabindex
2116          * @param $skin Skin object
2117          * @param $checked Array of checkbox => bool, where bool indicates the checked
2118          *                 status of the checkbox
2119          *
2120          * @return array
2121          */
2122         public function getCheckboxes( &$tabindex, $skin, $checked ) {
2123                 global $wgUser;
2124
2125                 $checkboxes = array();
2126
2127                 $checkboxes['minor'] = '';
2128                 $minorLabel = wfMsgExt('minoredit', array('parseinline'));
2129                 if ( $wgUser->isAllowed('minoredit') ) {
2130                         $attribs = array(
2131                                 'tabindex'  => ++$tabindex,
2132                                 'accesskey' => wfMsg( 'accesskey-minoredit' ),
2133                                 'id'        => 'wpMinoredit',
2134                         );
2135                         $checkboxes['minor'] =
2136                                 Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
2137                                 "&nbsp;<label for='wpMinoredit'".$skin->tooltip('minoredit', 'withaccess').">{$minorLabel}</label>";
2138                 }
2139
2140                 $watchLabel = wfMsgExt('watchthis', array('parseinline'));
2141                 $checkboxes['watch'] = '';
2142                 if ( $wgUser->isLoggedIn() ) {
2143                         $attribs = array(
2144                                 'tabindex'  => ++$tabindex,
2145                                 'accesskey' => wfMsg( 'accesskey-watch' ),
2146                                 'id'        => 'wpWatchthis',
2147                         );
2148                         $checkboxes['watch'] =
2149                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
2150                                 "&nbsp;<label for='wpWatchthis'".$skin->tooltip('watch', 'withaccess').">{$watchLabel}</label>";
2151                 }
2152                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
2153                 return $checkboxes;
2154         }
2155
2156         /**
2157          * Returns an array of html code of the following buttons:
2158          * save, diff, preview and live
2159          *
2160          * @param $tabindex Current tabindex
2161          *
2162          * @return array
2163          */
2164         public function getEditButtons(&$tabindex) {
2165                 global $wgLivePreview, $wgUser;
2166
2167                 $buttons = array();
2168
2169                 $temp = array(
2170                         'id'        => 'wpSave',
2171                         'name'      => 'wpSave',
2172                         'type'      => 'submit',
2173                         'tabindex'  => ++$tabindex,
2174                         'value'     => wfMsg('savearticle'),
2175                         'accesskey' => wfMsg('accesskey-save'),
2176                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
2177                 );
2178                 $buttons['save'] = Xml::element('input', $temp, '');
2179
2180                 ++$tabindex; // use the same for preview and live preview
2181                 if ( $wgLivePreview && $wgUser->getOption( 'uselivepreview' ) ) {
2182                         $temp = array(
2183                                 'id'        => 'wpPreview',
2184                                 'name'      => 'wpPreview',
2185                                 'type'      => 'submit',
2186                                 'tabindex'  => $tabindex,
2187                                 'value'     => wfMsg('showpreview'),
2188                                 'accesskey' => '',
2189                                 'title'     => wfMsg( 'tooltip-preview' ).' ['.wfMsg( 'accesskey-preview' ).']',
2190                                 'style'     => 'display: none;',
2191                         );
2192                         $buttons['preview'] = Xml::element('input', $temp, '');
2193
2194                         $temp = array(
2195                                 'id'        => 'wpLivePreview',
2196                                 'name'      => 'wpLivePreview',
2197                                 'type'      => 'submit',
2198                                 'tabindex'  => $tabindex,
2199                                 'value'     => wfMsg('showlivepreview'),
2200                                 'accesskey' => wfMsg('accesskey-preview'),
2201                                 'title'     => '',
2202                                 'onclick'   => $this->doLivePreviewScript(),
2203                         );
2204                         $buttons['live'] = Xml::element('input', $temp, '');
2205                 } else {
2206                         $temp = array(
2207                                 'id'        => 'wpPreview',
2208                                 'name'      => 'wpPreview',
2209                                 'type'      => 'submit',
2210                                 'tabindex'  => $tabindex,
2211                                 'value'     => wfMsg('showpreview'),
2212                                 'accesskey' => wfMsg('accesskey-preview'),
2213                                 'title'     => wfMsg( 'tooltip-preview' ).' ['.wfMsg( 'accesskey-preview' ).']',
2214                         );
2215                         $buttons['preview'] = Xml::element('input', $temp, '');
2216                         $buttons['live'] = '';
2217                 }
2218
2219                 $temp = array(
2220                         'id'        => 'wpDiff',
2221                         'name'      => 'wpDiff',
2222                         'type'      => 'submit',
2223                         'tabindex'  => ++$tabindex,
2224                         'value'     => wfMsg('showdiff'),
2225                         'accesskey' => wfMsg('accesskey-diff'),
2226                         'title'     => wfMsg( 'tooltip-diff' ).' ['.wfMsg( 'accesskey-diff' ).']',
2227                 );
2228                 $buttons['diff'] = Xml::element('input', $temp, '');
2229
2230                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
2231                 return $buttons;
2232         }
2233
2234         /**
2235          * Output preview text only. This can be sucked into the edit page
2236          * via JavaScript, and saves the server time rendering the skin as
2237          * well as theoretically being more robust on the client (doesn't
2238          * disturb the edit box's undo history, won't eat your text on
2239          * failure, etc).
2240          *
2241          * @todo This doesn't include category or interlanguage links.
2242          *       Would need to enhance it a bit, <s>maybe wrap them in XML
2243          *       or something...</s> that might also require more skin
2244          *       initialization, so check whether that's a problem.
2245          */
2246         function livePreview() {
2247                 global $wgOut;
2248                 $wgOut->disable();
2249                 header( 'Content-type: text/xml; charset=utf-8' );
2250                 header( 'Cache-control: no-cache' );
2251
2252                 $previewText = $this->getPreviewText();
2253                 #$categories = $skin->getCategoryLinks();
2254
2255                 $s =
2256                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
2257                 Xml::tags( 'livepreview', null,
2258                         Xml::element( 'preview', null, $previewText )
2259                         #.      Xml::element( 'category', null, $categories )
2260                 );
2261                 echo $s;
2262         }
2263
2264
2265         /**
2266          * Get a diff between the current contents of the edit box and the
2267          * version of the page we're editing from.
2268          *
2269          * If this is a section edit, we'll replace the section as for final
2270          * save and then make a comparison.
2271          */
2272         function showDiff() {
2273                 $oldtext = $this->mArticle->fetchContent();
2274                 $newtext = $this->mArticle->replaceSection(
2275                         $this->section, $this->textbox1, $this->summary, $this->edittime );
2276                 $newtext = $this->mArticle->preSaveTransform( $newtext );
2277                 $oldtitle = wfMsgExt( 'currentrev', array('parseinline') );
2278                 $newtitle = wfMsgExt( 'yourtext', array('parseinline') );
2279                 if ( $oldtext !== false  || $newtext != '' ) {
2280                         $de = new DifferenceEngine( $this->mTitle );
2281                         $de->setText( $oldtext, $newtext );
2282                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2283                         $de->showDiffStyle();
2284                 } else {
2285                         $difftext = '';
2286                 }
2287
2288                 global $wgOut;
2289                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2290         }
2291
2292         /**
2293          * Filter an input field through a Unicode de-armoring process if it
2294          * came from an old browser with known broken Unicode editing issues.
2295          *
2296          * @param WebRequest $request
2297          * @param string $field
2298          * @return string
2299          * @private
2300          */
2301         function safeUnicodeInput( $request, $field ) {
2302                 $text = rtrim( $request->getText( $field ) );
2303                 return $request->getBool( 'safemode' )
2304                         ? $this->unmakesafe( $text )
2305                         : $text;
2306         }
2307
2308         /**
2309          * Filter an output field through a Unicode armoring process if it is
2310          * going to an old browser with known broken Unicode editing issues.
2311          *
2312          * @param string $text
2313          * @return string
2314          * @private
2315          */
2316         function safeUnicodeOutput( $text ) {
2317                 global $wgContLang;
2318                 $codedText = $wgContLang->recodeForEdit( $text );
2319                 return $this->checkUnicodeCompliantBrowser()
2320                         ? $codedText
2321                         : $this->makesafe( $codedText );
2322         }
2323
2324         /**
2325          * A number of web browsers are known to corrupt non-ASCII characters
2326          * in a UTF-8 text editing environment. To protect against this,
2327          * detected browsers will be served an armored version of the text,
2328          * with non-ASCII chars converted to numeric HTML character references.
2329          *
2330          * Preexisting such character references will have a 0 added to them
2331          * to ensure that round-trips do not alter the original data.
2332          *
2333          * @param string $invalue
2334          * @return string
2335          * @private
2336          */
2337         function makesafe( $invalue ) {
2338                 // Armor existing references for reversability.
2339                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
2340
2341                 $bytesleft = 0;
2342                 $result = "";
2343                 $working = 0;
2344                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2345                         $bytevalue = ord( $invalue{$i} );
2346                         if ( $bytevalue <= 0x7F ) { //0xxx xxxx
2347                                 $result .= chr( $bytevalue );
2348                                 $bytesleft = 0;
2349                         } elseif ( $bytevalue <= 0xBF ) { //10xx xxxx
2350                                 $working = $working << 6;
2351                                 $working += ($bytevalue & 0x3F);
2352                                 $bytesleft--;
2353                                 if ( $bytesleft <= 0 ) {
2354                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
2355                                 }
2356                         } elseif ( $bytevalue <= 0xDF ) { //110x xxxx
2357                                 $working = $bytevalue & 0x1F;
2358                                 $bytesleft = 1;
2359                         } elseif ( $bytevalue <= 0xEF ) { //1110 xxxx
2360                                 $working = $bytevalue & 0x0F;
2361                                 $bytesleft = 2;
2362                         } else { //1111 0xxx
2363                                 $working = $bytevalue & 0x07;
2364                                 $bytesleft = 3;
2365                         }
2366                 }
2367                 return $result;
2368         }
2369
2370         /**
2371          * Reverse the previously applied transliteration of non-ASCII characters
2372          * back to UTF-8. Used to protect data from corruption by broken web browsers
2373          * as listed in $wgBrowserBlackList.
2374          *
2375          * @param string $invalue
2376          * @return string
2377          * @private
2378          */
2379         function unmakesafe( $invalue ) {
2380                 $result = "";
2381                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2382                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
2383                                 $i += 3;
2384                                 $hexstring = "";
2385                                 do {
2386                                         $hexstring .= $invalue{$i};
2387                                         $i++;
2388                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
2389
2390                                 // Do some sanity checks. These aren't needed for reversability,
2391                                 // but should help keep the breakage down if the editor
2392                                 // breaks one of the entities whilst editing.
2393                                 if ( (substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6) ) {
2394                                         $codepoint = hexdec($hexstring);
2395                                         $result .= codepointToUtf8( $codepoint );
2396                                 } else {
2397                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
2398                                 }
2399                         } else {
2400                                 $result .= substr( $invalue, $i, 1 );
2401                         }
2402                 }
2403                 // reverse the transform that we made for reversability reasons.
2404                 return strtr( $result, array( "&#x0" => "&#x" ) );
2405         }
2406
2407         function noCreatePermission() {
2408                 global $wgOut;
2409                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
2410                 $wgOut->addWikiMsg( 'nocreatetext' );
2411         }
2412
2413         /**
2414          * If there are rows in the deletion log for this page, show them,
2415          * along with a nice little note for the user
2416          *
2417          * @param OutputPage $out
2418          */
2419         protected function showDeletionLog( $out ) {
2420                 global $wgUser;
2421                 $loglist = new LogEventsList( $wgUser->getSkin(), $out );
2422                 $pager = new LogPager( $loglist, 'delete', false, $this->mTitle->getPrefixedText() );
2423                 $count = $pager->getNumRows();
2424                 if ( $count > 0 ) {
2425                         $pager->mLimit = 10;
2426                         $out->addHTML( '<div class="mw-warning-with-logexcerpt">' );
2427                         $out->addWikiMsg( 'recreate-deleted-warn' );
2428                         $out->addHTML(
2429                                 $loglist->beginLogEventsList() .
2430                                 $pager->getBody() .
2431                                 $loglist->endLogEventsList()
2432                         );
2433                         if($count > 10){
2434                                 $out->addHTML( $wgUser->getSkin()->link(
2435                                         SpecialPage::getTitleFor( 'Log' ),
2436                                         wfMsgHtml( 'deletelog-fulllog' ),
2437                                         array(),
2438                                         array(
2439                                                 'type' => 'delete',
2440                                                 'page' => $this->mTitle->getPrefixedText() ) ) );
2441                         }
2442                         $out->addHTML( '</div>' );
2443                         return true;
2444                 }
2445
2446                 return false;
2447         }
2448
2449         /**
2450          * Attempt submission
2451          * @return bool false if output is done, true if the rest of the form should be displayed
2452          */
2453         function attemptSave() {
2454                 global $wgUser, $wgOut, $wgTitle, $wgRequest;
2455
2456                 $resultDetails = false;
2457                 # Allow bots to exempt some edits from bot flagging
2458                 $bot = $wgUser->isAllowed('bot') && $wgRequest->getBool('bot',true);
2459                 $value = $this->internalAttemptSave( $resultDetails, $bot );
2460
2461                 if ( $value == self::AS_SUCCESS_UPDATE || $value == self::AS_SUCCESS_NEW_ARTICLE ) {
2462                         $this->didSave = true;
2463                 }
2464
2465                 switch ($value) {
2466                         case self::AS_HOOK_ERROR_EXPECTED:
2467                         case self::AS_CONTENT_TOO_BIG:
2468                         case self::AS_ARTICLE_WAS_DELETED:
2469                         case self::AS_CONFLICT_DETECTED:
2470                         case self::AS_SUMMARY_NEEDED:
2471                         case self::AS_TEXTBOX_EMPTY:
2472                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
2473                         case self::AS_END:
2474                                 return true;
2475
2476                         case self::AS_HOOK_ERROR:
2477                         case self::AS_FILTERING:
2478                         case self::AS_SUCCESS_NEW_ARTICLE:
2479                         case self::AS_SUCCESS_UPDATE:
2480                                 return false;
2481
2482                         case self::AS_SPAM_ERROR:
2483                                 $this->spamPage ( $resultDetails['spam'] );
2484                                 return false;
2485
2486                         case self::AS_BLOCKED_PAGE_FOR_USER:
2487                                 $this->blockedPage();
2488                                 return false;
2489
2490                         case self::AS_IMAGE_REDIRECT_ANON:
2491                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
2492                                 return false;
2493
2494                         case self::AS_READ_ONLY_PAGE_ANON:
2495                                 $this->userNotLoggedInPage();
2496                                 return false;
2497
2498                         case self::AS_READ_ONLY_PAGE_LOGGED:
2499                         case self::AS_READ_ONLY_PAGE:
2500                                 $wgOut->readOnlyPage();
2501                                 return false;
2502
2503                         case self::AS_RATE_LIMITED:
2504                                 $wgOut->rateLimited();
2505                                 return false;
2506
2507                         case self::AS_NO_CREATE_PERMISSION;
2508                                 $this->noCreatePermission();
2509                                 return;
2510
2511                         case self::AS_BLANK_ARTICLE:
2512                                 $wgOut->redirect( $wgTitle->getFullURL() );
2513                                 return false;
2514
2515                         case self::AS_IMAGE_REDIRECT_LOGGED:
2516                                 $wgOut->permissionRequired( 'upload' );
2517                                 return false;
2518                 }
2519         }
2520
2521         function getBaseRevision() {
2522                 if ( $this->mBaseRevision == false ) {
2523                         $db = wfGetDB( DB_MASTER );
2524                         $baseRevision = Revision::loadFromTimestamp(
2525                                 $db, $this->mTitle, $this->edittime );
2526                         return $this->mBaseRevision = $baseRevision;
2527                 } else {
2528                         return $this->mBaseRevision;
2529                 }
2530         }
2531 }