includes/EditPage.php

   1 <?php
   2 /**
   3  * Contain the EditPage class
   4  * @package MediaWiki
   5  */
   6
   7 /**
   8  * Splitting edit page/HTML interface 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  * @package MediaWiki
  14  */
  15
  16 class EditPage {
  17         var $mArticle;
  18         var $mTitle;
  19         var $mMetaData = '';
  20         var $isConflict = false;
  21         var $isCssJsSubpage = false;
  22         var $deletedSinceEdit = false;
  23         var $formtype;
  24         var $firsttime;
  25         var $lastDelete;
  26         var $mTokenOk = true;
  27
  28         # Form values
  29         var $save = false, $preview = false, $diff = false;
  30         var $minoredit = false, $watchthis = false, $recreate = false;
  31         var $textbox1 = '', $textbox2 = '', $summary = '';
  32         var $edittime = '', $section = '', $starttime = '';
  33         var $oldid = 0, $editintro = '', $scrolltop = null;
  34
  35         /**
  36          * @todo document
  37          * @param $article
  38          */
  39         function EditPage( $article ) {
  40                 $this->mArticle =& $article;
  41                 global $wgTitle;
  42                 $this->mTitle =& $wgTitle;
  43         }
  44
  45         /**
  46          * This is the function that extracts metadata from the article body on the first view.
  47          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
  48          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
  49          */
  50         function extractMetaDataFromArticle () {
  51                 global $wgUseMetadataEdit , $wgMetadataWhitelist , $wgLang ;
  52                 $this->mMetaData = '' ;
  53                 if ( !$wgUseMetadataEdit ) return ;
  54                 if ( $wgMetadataWhitelist == '' ) return ;
  55                 $s = '' ;
  56                 $t = $this->mArticle->getContent();
  57
  58                 # MISSING : <nowiki> filtering
  59
  60                 # Categories and language links
  61                 $t = explode ( "\n" , $t ) ;
  62                 $catlow = strtolower ( $wgLang->getNsText ( NS_CATEGORY ) ) ;
  63                 $cat = $ll = array() ;
  64                 foreach ( $t AS $key => $x )
  65                 {
  66                         $y = trim ( strtolower ( $x ) ) ;
  67                         while ( substr ( $y , 0 , 2 ) == '[[' )
  68                         {
  69                                 $y = explode ( ']]' , trim ( $x ) ) ;
  70                                 $first = array_shift ( $y ) ;
  71                                 $first = explode ( ':' , $first ) ;
  72                                 $ns = array_shift ( $first ) ;
  73                                 $ns = trim ( str_replace ( '[' , '' , $ns ) ) ;
  74                                 if ( strlen ( $ns ) == 2 OR strtolower ( $ns ) == $catlow )
  75                                 {
  76                                         $add = '[[' . $ns . ':' . implode ( ':' , $first ) . ']]' ;
  77                                         if ( strtolower ( $ns ) == $catlow ) $cat[] = $add ;
  78                                         else $ll[] = $add ;
  79                                         $x = implode ( ']]' , $y ) ;
  80                                         $t[$key] = $x ;
  81                                         $y = trim ( strtolower ( $x ) ) ;
  82                                 }
  83                         }
  84                 }
  85                 if ( count ( $cat ) ) $s .= implode ( ' ' , $cat ) . "\n" ;
  86                 if ( count ( $ll ) ) $s .= implode ( ' ' , $ll ) . "\n" ;
  87                 $t = implode ( "\n" , $t ) ;
  88
  89                 # Load whitelist
  90                 $sat = array () ; # stand-alone-templates; must be lowercase
  91                 $wl_title = Title::newFromText ( $wgMetadataWhitelist ) ;
  92                 $wl_article = new Article ( $wl_title ) ;
  93                 $wl = explode ( "\n" , $wl_article->getContent() ) ;
  94                 foreach ( $wl AS $x )
  95                 {
  96                         $isentry = false ;
  97                         $x = trim ( $x ) ;
  98                         while ( substr ( $x , 0 , 1 ) == '*' )
  99                         {
 100                                 $isentry = true ;
 101                                 $x = trim ( substr ( $x , 1 ) ) ;
 102                         }
 103                         if ( $isentry )
 104                         {
 105                                 $sat[] = strtolower ( $x ) ;
 106                         }
 107
 108                 }
 109
 110                 # Templates, but only some
 111                 $t = explode ( '{{' , $t ) ;
 112                 $tl = array () ;
 113                 foreach ( $t AS $key => $x )
 114                 {
 115                         $y = explode ( '}}' , $x , 2 ) ;
 116                         if ( count ( $y ) == 2 )
 117                         {
 118                                 $z = $y[0] ;
 119                                 $z = explode ( '|' , $z ) ;
 120                                 $tn = array_shift ( $z ) ;
 121                                 if ( in_array ( strtolower ( $tn ) , $sat ) )
 122                                 {
 123                                         $tl[] = '{{' . $y[0] . '}}' ;
 124                                         $t[$key] = $y[1] ;
 125                                         $y = explode ( '}}' , $y[1] , 2 ) ;
 126                                 }
 127                                 else $t[$key] = '{{' . $x ;
 128                         }
 129                         else if ( $key != 0 ) $t[$key] = '{{' . $x ;
 130                         else $t[$key] = $x ;
 131                 }
 132                 if ( count ( $tl ) ) $s .= implode ( ' ' , $tl ) ;
 133                 $t = implode ( '' , $t ) ;
 134
 135                 $t = str_replace ( "\n\n\n" , "\n" , $t ) ;
 136                 $this->mArticle->mContent = $t ;
 137                 $this->mMetaData = $s ;
 138         }
 139
 140         function submit() {
 141                 $this->edit();
 142         }
 143
 144         /**
 145          * This is the function that gets called for "action=edit". It
 146          * sets up various member variables, then passes execution to
 147          * another function, usually showEditForm()
 148          *
 149          * The edit form is self-submitting, so that when things like
 150          * preview and edit conflicts occur, we get the same form back
 151          * with the extra stuff added.  Only when the final submission
 152          * is made and all is well do we actually save and redirect to
 153          * the newly-edited page.
 154          */
 155         function edit() {
 156                 global $wgOut, $wgUser, $wgRequest, $wgTitle;
 157
 158                 if ( ! wfRunHooks( 'AlternateEdit', array( &$this  ) ) )
 159                         return;
 160
 161                 $fname = 'EditPage::edit';
 162                 wfProfileIn( $fname );
 163                 wfDebug( "$fname: enter\n" );
 164
 165                 // this is not an article
 166                 $wgOut->setArticleFlag(false);
 167
 168                 $this->importFormData( $wgRequest );
 169                 $this->firsttime = false;
 170
 171                 if( $this->live ) {
 172                         $this->livePreview();
 173                         wfProfileOut( $fname );
 174                         return;
 175                 }
 176
 177                 if ( ! $this->mTitle->userCanEdit() ) {
 178                         wfDebug( "$fname: user can't edit\n" );
 179                         $wgOut->readOnlyPage( $this->mArticle->getContent(), true );
 180                         wfProfileOut( $fname );
 181                         return;
 182                 }
 183                 wfDebug( "$fname: Checking blocks\n" );
 184                 if ( !$this->preview && !$this->diff && $wgUser->isBlockedFrom( $this->mTitle, !$this->save ) ) {
 185                         # When previewing, don't check blocked state - will get caught at save time.
 186                         # Also, check when starting edition is done against slave to improve performance.
 187                         wfDebug( "$fname: user is blocked\n" );
 188                         $wgOut->blockedPage();
 189                         wfProfileOut( $fname );
 190                         return;
 191                 }
 192                 if ( !$wgUser->isAllowed('edit') ) {
 193                         if ( $wgUser->isAnon() ) {
 194                                 wfDebug( "$fname: user must log in\n" );
 195                                 $this->userNotLoggedInPage();
 196                                 wfProfileOut( $fname );
 197                                 return;
 198                         } else {
 199                                 wfDebug( "$fname: read-only page\n" );
 200                                 $wgOut->readOnlyPage( $this->mArticle->getContent(), true );
 201                                 wfProfileOut( $fname );
 202                                 return;
 203                         }
 204                 }
 205                 if ( !$this->mTitle->userCan( 'create' ) && !$this->mTitle->exists() ) {
 206                         wfDebug( "$fname: no create permission\n" );
 207                         $this->noCreatePermission();
 208                         wfProfileOut( $fname );
 209                         return;
 210                 }
 211                 if ( wfReadOnly() ) {
 212                         wfDebug( "$fname: read-only mode is engaged\n" );
 213                         if( $this->save || $this->preview ) {
 214                                 $this->formtype = 'preview';
 215                         } else if ( $this->diff ) {
 216                                 $this->formtype = 'diff';
 217                         } else {
 218                                 $wgOut->readOnlyPage( $this->mArticle->getContent() );
 219                                 wfProfileOut( $fname );
 220                                 return;
 221                         }
 222                 } else {
 223                         if ( $this->save ) {
 224                                 $this->formtype = 'save';
 225                         } else if ( $this->preview ) {
 226                                 $this->formtype = 'preview';
 227                         } else if ( $this->diff ) {
 228                                 $this->formtype = 'diff';
 229                         } else { # First time through
 230                                 $this->firsttime = true;
 231                                 if( $this->previewOnOpen() ) {
 232                                         $this->formtype = 'preview';
 233                                 } else {
 234                                         $this->extractMetaDataFromArticle () ;
 235                                         $this->formtype = 'initial';
 236                                 }
 237                         }
 238                 }
 239
 240                 wfProfileIn( "$fname-business-end" );
 241
 242                 $this->isConflict = false;
 243                 // css / js subpages of user pages get a special treatment
 244                 $this->isCssJsSubpage = $wgTitle->isCssJsSubpage();
 245
 246                 /* Notice that we can't use isDeleted, because it returns true if article is ever deleted
 247                  * no matter it's current state
 248                  */
 249                 $this->deletedSinceEdit = false;
 250                 if ( $this->edittime != '' ) {
 251                         /* Note that we rely on logging table, which hasn't been always there,
 252                          * but that doesn't matter, because this only applies to brand new
 253                          * deletes. This is done on every preview and save request. Move it further down
 254                          * to only perform it on saves
 255                          */
 256                         if ( $this->mTitle->isDeleted() ) {
 257                                 $this->lastDelete = $this->getLastDelete();
 258                                 if ( !is_null($this->lastDelete) ) {
 259                                         $deletetime = $this->lastDelete->log_timestamp;
 260                                         if ( ($deletetime - $this->starttime) > 0 ) {
 261                                                 $this->deletedSinceEdit = true;
 262                                         }
 263                                 }
 264                         }
 265                 }
 266
 267                 if(!$this->mTitle->getArticleID() && ('initial' == $this->formtype || $this->firsttime )) { # new article
 268                         $this->showIntro();
 269                 }
 270                 if( $this->mTitle->isTalkPage() ) {
 271                         $wgOut->addWikiText( wfMsg( 'talkpagetext' ) );
 272                 }
 273
 274                 # Attempt submission here.  This will check for edit conflicts,
 275                 # and redundantly check for locked database, blocked IPs, etc.
 276                 # that edit() already checked just in case someone tries to sneak
 277                 # in the back door with a hand-edited submission URL.
 278
 279                 if ( 'save' == $this->formtype ) {
 280                         if ( !$this->attemptSave() ) {
 281                                 wfProfileOut( "$fname-business-end" );
 282                                 wfProfileOut( $fname );
 283                                 return;
 284                         }
 285                 }
 286
 287                 # First time through: get contents, set time for conflict
 288                 # checking, etc.
 289                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 290                         $this->initialiseForm();
 291                 }
 292
 293                 $this->showEditForm();
 294                 wfProfileOut( "$fname-business-end" );
 295                 wfProfileOut( $fname );
 296         }
 297
 298         /**
 299          * Return true if this page should be previewed when the edit form
 300          * is initially opened.
 301          * @return bool
 302          * @access private
 303          */
 304         function previewOnOpen() {
 305                 global $wgUser;
 306                 return $this->section != 'new' &&
 307                         ( ( $wgUser->getOption( 'previewonfirst' ) && $this->mTitle->exists() ) ||
 308                                 ( $this->mTitle->getNamespace() == NS_CATEGORY &&
 309                                         !$this->mTitle->exists() ) );
 310         }
 311
 312         /**
 313          * @todo document
 314          */
 315         function importFormData( &$request ) {
 316                 global $wgLang ;
 317                 $fname = 'EditPage::importFormData';
 318                 wfProfileIn( $fname );
 319
 320                 if( $request->wasPosted() ) {
 321                         # These fields need to be checked for encoding.
 322                         # Also remove trailing whitespace, but don't remove _initial_
 323                         # whitespace from the text boxes. This may be significant formatting.
 324                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 325                         $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
 326                         $this->mMetaData = rtrim( $request->getText( 'metadata'   ) );
 327                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 328                         $this->summary   = $wgLang->truncate( $request->getText( 'wpSummary'  ), 250 );
 329
 330                         $this->edittime = $request->getVal( 'wpEdittime' );
 331                         $this->starttime = $request->getVal( 'wpStarttime' );
 332
 333                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 334
 335                         if( is_null( $this->edittime ) ) {
 336                                 # If the form is incomplete, force to preview.
 337                                 wfDebug( "$fname: Form data appears to be incomplete\n" );
 338                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 339                                 $this->preview  = true;
 340                         } else {
 341                                 $this->preview = $request->getCheck( 'wpPreview' );
 342                                 $this->diff = $request->getCheck( 'wpDiff' );
 343
 344                                 if( !$this->preview ) {
 345                                         if ( $this->tokenOk( $request ) ) {
 346                                                 # Some browsers will not report any submit button
 347                                                 # if the user hits enter in the comment box.
 348                                                 # The unmarked state will be assumed to be a save,
 349                                                 # if the form seems otherwise complete.
 350                                                 wfDebug( "$fname: Passed token check.\n" );
 351                                         } else {
 352                                                 # Page might be a hack attempt posted from
 353                                                 # an external site. Preview instead of saving.
 354                                                 wfDebug( "$fname: Failed token check; forcing preview\n" );
 355                                                 $this->preview = true;
 356                                         }
 357                                 }
 358                         }
 359                         $this->save    = ! ( $this->preview OR $this->diff );
 360                         if( !preg_match( '/^\d{14}$/', $this->edittime )) {
 361                                 $this->edittime = null;
 362                         }
 363
 364                         if( !preg_match( '/^\d{14}$/', $this->starttime )) {
 365                                 $this->starttime = null;
 366                         }
 367
 368                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 369
 370                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 371                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 372                 } else {
 373                         # Not a posted form? Start with nothing.
 374                         wfDebug( "$fname: Not a posted form.\n" );
 375                         $this->textbox1  = '';
 376                         $this->textbox2  = '';
 377                         $this->mMetaData = '';
 378                         $this->summary   = '';
 379                         $this->edittime  = '';
 380                         $this->starttime = wfTimestampNow();
 381                         $this->preview   = false;
 382                         $this->save      = false;
 383                         $this->diff      = false;
 384                         $this->minoredit = false;
 385                         $this->watchthis = false;
 386                         $this->recreate  = false;
 387                 }
 388
 389                 $this->oldid = $request->getInt( 'oldid' );
 390
 391                 # Section edit can come from either the form or a link
 392                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 393
 394                 $this->live = $request->getCheck( 'live' );
 395                 $this->editintro = $request->getText( 'editintro' );
 396
 397                 wfProfileOut( $fname );
 398         }
 399
 400         /**
 401          * Make sure the form isn't faking a user's credentials.
 402          *
 403          * @param WebRequest $request
 404          * @return bool
 405          * @access private
 406          */
 407         function tokenOk( &$request ) {
 408                 global $wgUser;
 409                 if( $wgUser->isAnon() ) {
 410                         # Anonymous users may not have a session
 411                         # open. Don't tokenize.
 412                         $this->mTokenOk = true;
 413                 } else {
 414                         $this->mTokenOk = $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
 415                 }
 416                 return $this->mTokenOk;
 417         }
 418
 419         function showIntro() {
 420                 global $wgOut, $wgUser;
 421                 $addstandardintro=true;
 422                 if($this->editintro) {
 423                         $introtitle=Title::newFromText($this->editintro);
 424                         if(isset($introtitle) && $introtitle->userCanRead()) {
 425                                 $rev=Revision::newFromTitle($introtitle);
 426                                 if($rev) {
 427                                         $wgOut->addWikiText($rev->getText());
 428                                         $addstandardintro=false;
 429                                 }
 430                         }
 431                 }
 432                 if($addstandardintro) {
 433                         if ( $wgUser->isLoggedIn() )
 434                                 $wgOut->addWikiText( wfMsg( 'newarticletext' ) );
 435                         else
 436                                 $wgOut->addWikiText( wfMsg( 'newarticletextanon' ) );
 437                 }
 438         }
 439
 440         /**
 441          * Attempt submission
 442          * @return bool false if output is done, true if the rest of the form should be displayed
 443          */
 444         function attemptSave() {
 445                 global $wgSpamRegex, $wgFilterCallback, $wgUser, $wgOut;
 446
 447                 $fname = 'EditPage::attemptSave';
 448                 wfProfileIn( $fname );
 449                 wfProfileIn( "$fname-checks" );
 450
 451                 # Reintegrate metadata
 452                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 453                 $this->mMetaData = '' ;
 454
 455                 # Check for spam
 456                 if ( $wgSpamRegex && preg_match( $wgSpamRegex, $this->textbox1, $matches ) ) {
 457                         $this->spamPage ( $matches[0] );
 458                         wfProfileOut( "$fname-checks" );
 459                         wfProfileOut( $fname );
 460                         return false;
 461                 }
 462                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section ) ) {
 463                         # Error messages or other handling should be performed by the filter function
 464                         wfProfileOut( $fname );
 465                         wfProfileOut( "$fname-checks" );
 466                         return false;
 467                 }
 468                 if ( !wfRunHooks( 'EditFilter', array( &$this, $this->textbox1, $this->section ) ) ) {
 469                         # Error messages or other handling should be performed by the filter function
 470                         wfProfileOut( $fname );
 471                         wfProfileOut( "$fname-checks" );
 472                         return false;
 473                 }
 474                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 475                         # Check block state against master, thus 'false'.
 476                         $this->blockedIPpage();
 477                         wfProfileOut( "$fname-checks" );
 478                         wfProfileOut( $fname );
 479                         return false;
 480                 }
 481
 482                 if ( !$wgUser->isAllowed('edit') ) {
 483                         if ( $wgUser->isAnon() ) {
 484                                 $this->userNotLoggedInPage();
 485                                 wfProfileOut( "$fname-checks" );
 486                                 wfProfileOut( $fname );
 487                                 return false;
 488                         }
 489                         else {
 490                                 $wgOut->readOnlyPage();
 491                                 wfProfileOut( "$fname-checks" );
 492                                 wfProfileOut( $fname );
 493                                 return false;
 494                         }
 495                 }
 496
 497                 if ( wfReadOnly() ) {
 498                         $wgOut->readOnlyPage();
 499                         wfProfileOut( "$fname-checks" );
 500                         wfProfileOut( $fname );
 501                         return false;
 502                 }
 503                 if ( $wgUser->pingLimiter() ) {
 504                         $wgOut->rateLimited();
 505                         wfProfileOut( "$fname-checks" );
 506                         wfProfileOut( $fname );
 507                         return false;
 508                 }
 509
 510                 # If the article has been deleted while editing, don't save it without
 511                 # confirmation
 512                 if ( $this->deletedSinceEdit && !$this->recreate ) {
 513                         wfProfileOut( "$fname-checks" );
 514                         wfProfileOut( $fname );
 515                         return true;
 516                 }
 517
 518                 wfProfileOut( "$fname-checks" );
 519
 520                 # If article is new, insert it.
 521                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 522                 if ( 0 == $aid ) {
 523                         // Late check for create permission, just in case *PARANOIA*
 524                         if ( !$this->mTitle->userCan( 'create' ) ) {
 525                                 wfDebug( "$fname: no create permission\n" );
 526                                 $this->noCreatePermission();
 527                                 wfProfileOut( $fname );
 528                                 return;
 529                         }
 530
 531                         # Don't save a new article if it's blank.
 532                         if ( ( '' == $this->textbox1 ) ) {
 533                                         $wgOut->redirect( $this->mTitle->getFullURL() );
 534                                         wfProfileOut( $fname );
 535                                         return false;
 536                         }
 537
 538                         $isComment=($this->section=='new');
 539                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 540                                 $this->minoredit, $this->watchthis, false, $isComment);
 541
 542                         wfProfileOut( $fname );
 543                         return false;
 544                 }
 545
 546                 # Article exists. Check for edit conflict.
 547
 548                 $this->mArticle->clear(); # Force reload of dates, etc.
 549                 $this->mArticle->forUpdate( true ); # Lock the article
 550
 551                 if( $this->mArticle->getTimestamp() != $this->edittime ) {
 552                         $this->isConflict = true;
 553                         if( $this->section == 'new' ) {
 554                                 if( $this->mArticle->getUserText() == $wgUser->getName() &&
 555                                         $this->mArticle->getComment() == $this->summary ) {
 556                                         // Probably a duplicate submission of a new comment.
 557                                         // This can happen when squid resends a request after
 558                                         // a timeout but the first one actually went through.
 559                                         wfDebug( "EditPage::editForm duplicate new section submission; trigger edit conflict!\n" );
 560                                 } else {
 561                                         // New comment; suppress conflict.
 562                                         $this->isConflict = false;
 563                                         wfDebug( "EditPage::editForm conflict suppressed; new section\n" );
 564                                 }
 565                         }
 566                 }
 567                 $userid = $wgUser->getID();
 568
 569                 if ( $this->isConflict) {
 570                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 571                                 $this->mArticle->getTimestamp() . "'\n" );
 572                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime);
 573                 }
 574                 else {
 575                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 576                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary);
 577                 }
 578                 if( is_null( $text ) ) {
 579                         wfDebug( "EditPage::editForm activating conflict; section replace failed.\n" );
 580                         $this->isConflict = true;
 581                         $text = $this->textbox1;
 582                 }
 583
 584                 # Suppress edit conflict with self, except for section edits where merging is required.
 585                 if ( ( $this->section == '' ) && ( 0 != $userid ) && ( $this->mArticle->getUser() == $userid ) ) {
 586                         wfDebug( "Suppressing edit conflict, same user.\n" );
 587                         $this->isConflict = false;
 588                 } else {
 589                         # switch from section editing to normal editing in edit conflict
 590                         if($this->isConflict) {
 591                                 # Attempt merge
 592                                 if( $this->mergeChangesInto( $text ) ){
 593                                         // Successful merge! Maybe we should tell the user the good news?
 594                                         $this->isConflict = false;
 595                                         wfDebug( "Suppressing edit conflict, successful merge.\n" );
 596                                 } else {
 597                                         $this->section = '';
 598                                         $this->textbox1 = $text;
 599                                         wfDebug( "Keeping edit conflict, failed merge.\n" );
 600                                 }
 601                         }
 602                 }
 603
 604                 if ( $this->isConflict ) {
 605                         wfProfileOut( $fname );
 606                         return true;
 607                 }
 608
 609                 # All's well
 610                 wfProfileIn( "$fname-sectionanchor" );
 611                 $sectionanchor = '';
 612                 if( $this->section == 'new' ) {
 613                         if( $this->summary != '' ) {
 614                                 $sectionanchor = $this->sectionAnchor( $this->summary );
 615                         }
 616                 } elseif( $this->section != '' ) {
 617                         # Try to get a section anchor from the section source, redirect to edited section if header found
 618                         # XXX: might be better to integrate this into Article::replaceSection
 619                         # for duplicate heading checking and maybe parsing
 620                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 621                         # we can't deal with anchors, includes, html etc in the header for now,
 622                         # headline would need to be parsed to improve this
 623                         if($hasmatch and strlen($matches[2]) > 0) {
 624                                 $sectionanchor = $this->sectionAnchor( $matches[2] );
 625                         }
 626                 }
 627                 wfProfileOut( "$fname-sectionanchor" );
 628
 629                 // Save errors may fall down to the edit form, but we've now
 630                 // merged the section into full text. Clear the section field
 631                 // so that later submission of conflict forms won't try to
 632                 // replace that into a duplicated mess.
 633                 $this->textbox1 = $text;
 634                 $this->section = '';
 635
 636                 # update the article here
 637                 if( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
 638                         $this->watchthis, '', $sectionanchor ) ) {
 639                         wfProfileOut( $fname );
 640                         return false;
 641                 } else {
 642                         $this->isConflict = true;
 643                 }
 644                 wfProfileOut( $fname );
 645                 return true;
 646         }
 647
 648         /**
 649          * Initialise form fields in the object
 650          * Called on the first invocation, e.g. when a user clicks an edit link
 651          */
 652         function initialiseForm() {
 653                 $this->edittime = $this->mArticle->getTimestamp();
 654                 $this->textbox1 = $this->mArticle->getContent();
 655                 $this->summary = '';
 656                 if ( !$this->mArticle->exists() && $this->mArticle->mTitle->getNamespace() == NS_MEDIAWIKI )
 657                         $this->textbox1 = wfMsgWeirdKey ( $this->mArticle->mTitle->getText() ) ;
 658                 wfProxyCheck();
 659         }
 660
 661         /**
 662          * Send the edit form and related headers to $wgOut
 663          * @param $formCallback Optional callable that takes an OutputPage
 664          *                      parameter; will be called during form output
 665          *                      near the top, for captchas and the like.
 666          */
 667         function showEditForm( $formCallback=null ) {
 668                 global $wgOut, $wgUser, $wgLang, $wgContLang;
 669
 670                 $fname = 'EditPage::showEditForm';
 671                 wfProfileIn( $fname );
 672
 673                 $sk =& $wgUser->getSkin();
 674
 675                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) ) ;
 676
 677                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 678
 679                 # Enabled article-related sidebar, toplinks, etc.
 680                 $wgOut->setArticleRelated( true );
 681
 682                 if ( $this->isConflict ) {
 683                         $s = wfMsg( 'editconflict', $this->mTitle->getPrefixedText() );
 684                         $wgOut->setPageTitle( $s );
 685                         $wgOut->addWikiText( wfMsg( 'explainconflict' ) );
 686
 687                         $this->textbox2 = $this->textbox1;
 688                         $this->textbox1 = $this->mArticle->getContent();
 689                         $this->edittime = $this->mArticle->getTimestamp();
 690                 } else {
 691
 692                         if( $this->section != '' ) {
 693                                 if( $this->section == 'new' ) {
 694                                         $s = wfMsg('editingcomment', $this->mTitle->getPrefixedText() );
 695                                 } else {
 696                                         $s = wfMsg('editingsection', $this->mTitle->getPrefixedText() );
 697                                         if( !$this->preview && !$this->diff ) {
 698                                                 preg_match( "/^(=+)(.+)\\1/mi",
 699                                                         $this->textbox1,
 700                                                         $matches );
 701                                                 if( !empty( $matches[2] ) ) {
 702                                                         $this->summary = "/* ". trim($matches[2])." */ ";
 703                                                 }
 704                                         }
 705                                 }
 706                         } else {
 707                                 $s = wfMsg( 'editing', $this->mTitle->getPrefixedText() );
 708                         }
 709                         $wgOut->setPageTitle( $s );
 710                         if ( !$this->checkUnicodeCompliantBrowser() ) {
 711                                 $wgOut->addWikiText( wfMsg( 'nonunicodebrowser') );
 712                         }
 713                         if ( isset( $this->mArticle )
 714                              && isset( $this->mArticle->mRevision )
 715                              && !$this->mArticle->mRevision->isCurrent() ) {
 716                                 $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
 717                                 $wgOut->addWikiText( wfMsg( 'editingold' ) );
 718                         }
 719                 }
 720
 721                 if( wfReadOnly() ) {
 722                         $wgOut->addWikiText( wfMsg( 'readonlywarning' ) );
 723                 } else if ( $this->isCssJsSubpage and 'preview' != $this->formtype) {
 724                         $wgOut->addWikiText( wfMsg( 'usercssjsyoucanpreview' ));
 725                 }
 726                 if( $this->mTitle->isProtected('edit') ) {
 727                         $wgOut->addWikiText( wfMsg( 'protectedpagewarning' ) );
 728                 }
 729
 730                 $kblength = (int)(strlen( $this->textbox1 ) / 1024);
 731                 if( $kblength > 29 ) {
 732                         $wgOut->addWikiText( wfMsg( 'longpagewarning', $wgLang->formatNum( $kblength ) ) );
 733                 }
 734
 735                 $rows = $wgUser->getOption( 'rows' );
 736                 $cols = $wgUser->getOption( 'cols' );
 737
 738                 $ew = $wgUser->getOption( 'editwidth' );
 739                 if ( $ew ) $ew = " style=\"width:100%\"";
 740                 else $ew = '';
 741
 742                 $q = 'action=submit';
 743                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
 744                 $action = $this->mTitle->escapeLocalURL( $q );
 745
 746                 $summary = wfMsg('summary');
 747                 $subject = wfMsg('subject');
 748                 $minor   = wfMsg('minoredit');
 749                 $watchthis = wfMsg ('watchthis');
 750                 $save = wfMsg('savearticle');
 751                 $prev = wfMsg('showpreview');
 752                 $diff = wfMsg('showdiff');
 753
 754                 $cancel = $sk->makeKnownLink( $this->mTitle->getPrefixedText(),
 755                                 wfMsg('cancel') );
 756                 $edithelpurl = $sk->makeInternalOrExternalUrl( wfMsg( 'edithelppage' ));
 757                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
 758                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
 759                         htmlspecialchars( wfMsg( 'newwindow' ) );
 760
 761                 global $wgRightsText;
 762                 $copywarn = "<div id=\"editpage-copywarn\">\n" .
 763                         wfMsg( $wgRightsText ? 'copyrightwarning' : 'copyrightwarning2',
 764                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
 765                                 $wgRightsText ) . "\n</div>";
 766
 767                 if( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
 768                         # prepare toolbar for edit buttons
 769                         $toolbar = $this->getEditToolbar();
 770                 } else {
 771                         $toolbar = '';
 772                 }
 773
 774                 // activate checkboxes if user wants them to be always active
 775                 if( !$this->preview && !$this->diff ) {
 776                         if( $wgUser->getOption( 'watchdefault' ) ) $this->watchthis = true;
 777                         if( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
 778
 779                         // activate checkbox also if user is already watching the page,
 780                         // require wpWatchthis to be unset so that second condition is not
 781                         // checked unnecessarily
 782                         if( !$this->watchthis && $this->mTitle->userIsWatching() ) $this->watchthis = true;
 783                 }
 784
 785                 $minoredithtml = '';
 786
 787                 if ( $wgUser->isAllowed('minoredit') ) {
 788                         $minoredithtml =
 789                                 "<input tabindex='3' type='checkbox' value='1' name='wpMinoredit'".($this->minoredit?" checked='checked'":"").
 790                                 " accesskey='".wfMsg('accesskey-minoredit')."' id='wpMinoredit' />".
 791                                 "<label for='wpMinoredit' title='".wfMsg('tooltip-minoredit')."'>{$minor}</label>";
 792                 }
 793
 794                 $watchhtml = '';
 795
 796                 if ( $wgUser->isLoggedIn() ) {
 797                         $watchhtml = "<input tabindex='4' type='checkbox' name='wpWatchthis'".
 798                                 ($this->watchthis?" checked='checked'":"").
 799                                 " accesskey=\"".htmlspecialchars(wfMsg('accesskey-watch'))."\" id='wpWatchthis'  />".
 800                                 "<label for='wpWatchthis' title=\"" .
 801                                         htmlspecialchars(wfMsg('tooltip-watch'))."\">{$watchthis}</label>";
 802                 }
 803
 804                 $checkboxhtml = $minoredithtml . $watchhtml;
 805
 806                 if ( 'preview' == $this->formtype && $wgUser->getOption( 'previewontop' ) ) {
 807                         $this->showPreview();
 808                 }
 809                 if ( 'diff' == $this->formtype ) {
 810                         if ( $wgUser->getOption('previewontop' ) ) {
 811                                 $wgOut->addHTML( $this->getDiff() );
 812                         }
 813                 }
 814
 815
 816                 # if this is a comment, show a subject line at the top, which is also the edit summary.
 817                 # Otherwise, show a summary field at the bottom
 818                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
 819                 if( $this->section == 'new' ) {
 820                         $commentsubject="<span id='wpSummaryLabel'><label for='wpSummary'>{$subject}:</label></span> <div class='editOptions'><input tabindex='1' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
 821                         $editsummary = '';
 822                 } else {
 823                         $commentsubject = '';
 824                         $editsummary="<span id='wpSummaryLabel'><label for='wpSummary'>{$summary}:</label></span> <div class='editOptions'><input tabindex='2' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
 825                 }
 826
 827                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
 828                 if( !$this->preview && !$this->diff ) {
 829                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
 830                 }
 831                 $templates = $this->formatTemplates();
 832
 833                 global $wgLivePreview;
 834                 if ( $wgLivePreview ) {
 835                         $liveOnclick = $this->doLivePreviewScript();
 836                 } else {
 837                         $liveOnclick = '';
 838                 }
 839
 840                 global $wgUseMetadataEdit ;
 841                 if ( $wgUseMetadataEdit ) {
 842                         $metadata = $this->mMetaData ;
 843                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
 844                         $helppage = Title::newFromText( wfMsg( "metadata_page" ) ) ;
 845                         $top = wfMsg( 'metadata', $helppage->getLocalURL() );
 846                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
 847                 }
 848                 else $metadata = "" ;
 849
 850                 $hidden = '';
 851                 $recreate = '';
 852                 if ($this->deletedSinceEdit) {
 853                         if ( 'save' != $this->formtype ) {
 854                                 $wgOut->addWikiText( wfMsg('deletedwhileediting'));
 855                         } else {
 856                                 // Hide the toolbar and edit area, use can click preview to get it back
 857                                 // Add an confirmation checkbox and explanation.
 858                                 $toolbar = '';
 859                                 $hidden = 'type="hidden" style="display:none;"';
 860                                 $recreate = $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ));
 861                                 $recreate .=
 862                                         "<br /><input tabindex='1' type='checkbox' value='1' name='wpRecreate' id='wpRecreate' />".
 863                                         "<label for='wpRecreate' title='".wfMsg('tooltip-recreate')."'>". wfMsg('recreate')."</label>";
 864                         }
 865                 }
 866
 867                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
 868                         ? ""
 869                         : "<input type='hidden' name=\"safemode\" value='1' />\n";
 870
 871                 $wgOut->addHTML( <<<END
 872 {$toolbar}
 873 <form id="editform" name="editform" method="post" action="$action"
 874 enctype="multipart/form-data">
 875 END
 876 );
 877                 if( is_callable( $formCallback ) ) {
 878                         call_user_func_array( $formCallback, array( &$wgOut ) );
 879                 }
 880
 881                 // Put these up at the top to ensure they aren't lost on early form submission
 882                 $wgOut->addHTML( "
 883 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
 884 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
 885 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
 886 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
 887
 888                 $wgOut->addHTML( <<<END
 889 $recreate
 890 {$commentsubject}
 891 <textarea tabindex='1' accesskey="," name="wpTextbox1" id="wpTextbox1" rows='{$rows}'
 892 cols='{$cols}'{$ew} $hidden>
 893 END
 894 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox1 ) ) .
 895 "
 896 </textarea>
 897
 898                 " );
 899
 900                 $wgOut->addWikiText( $copywarn );
 901
 902                 $wgOut->addHTML( "
 903 {$metadata}
 904 {$editsummary}
 905 {$checkboxhtml}
 906 {$safemodehtml}
 907 ");
 908
 909                 $wgOut->addHTML( "
 910 <div class='editButtons'>
 911 <input tabindex='5' id='wpSave' type='submit' value=\"{$save}\" name=\"wpSave\" accesskey=\"".wfMsg('accesskey-save')."\"".
 912 " title=\"".wfMsg('tooltip-save')."\"/>
 913 <input tabindex='6' id='wpPreview' type='submit' $liveOnclick value=\"{$prev}\" name=\"wpPreview\" accesskey=\"".wfMsg('accesskey-preview')."\"".
 914 " title=\"".wfMsg('tooltip-preview')."\"/>
 915 <input tabindex='7' id='wpDiff' type='submit' value=\"{$diff}\" name=\"wpDiff\" accesskey=\"".wfMsg('accesskey-diff')."\"".
 916 " title=\"".wfMsg('tooltip-diff')."\"/> <span class='editHelp'>{$cancel} | {$edithelp}</span></div>
 917 </div>
 918 " );
 919
 920                 $wgOut->addWikiText( wfMsgForContent( 'edittools' ) );
 921
 922                 $wgOut->addHTML( "
 923 <div class='templatesUsed'>
 924 {$templates}
 925 </div>
 926 " );
 927
 928                 if ( $wgUser->isLoggedIn() ) {
 929                         /**
 930                          * To make it harder for someone to slip a user a page
 931                          * which submits an edit form to the wiki without their
 932                          * knowledge, a random token is associated with the login
 933                          * session. If it's not passed back with the submission,
 934                          * we won't save the page, or render user JavaScript and
 935                          * CSS previews.
 936                          */
 937                         $token = htmlspecialchars( $wgUser->editToken() );
 938                         $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
 939                 }
 940
 941
 942                 if ( $this->isConflict ) {
 943                         require_once( "DifferenceEngine.php" );
 944                         $wgOut->addWikiText( '==' . wfMsg( "yourdiff" ) . '==' );
 945
 946                         $de = new DifferenceEngine( $this->mTitle );
 947                         $de->setText( $this->textbox2, $this->textbox1 );
 948                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
 949
 950                         $wgOut->addWikiText( '==' . wfMsg( "yourtext" ) . '==' );
 951                         $wgOut->addHTML( "<textarea tabindex=6 id='wpTextbox2' name=\"wpTextbox2\" rows='{$rows}' cols='{$cols}' wrap='virtual'>"
 952                                 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox2 ) ) . "\n</textarea>" );
 953                 }
 954                 $wgOut->addHTML( "</form>\n" );
 955                 if ( $this->formtype == 'preview' && !$wgUser->getOption( 'previewontop' ) ) {
 956                         $this->showPreview();
 957                 }
 958                 if ( $this->formtype == 'diff' && !$wgUser->getOption( 'previewontop' ) ) {
 959                         #$wgOut->addHTML( '<div id="wikiPreview">' . $difftext . '</div>' );
 960                         $wgOut->addHTML( $this->getDiff() );
 961                 }
 962
 963                 wfProfileOut( $fname );
 964         }
 965
 966         /**
 967          * Append preview output to $wgOut.
 968          * Includes category rendering if this is a category page.
 969          * @access private
 970          */
 971         function showPreview() {
 972                 global $wgOut;
 973                 $wgOut->addHTML( '<div id="wikiPreview">' );
 974                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
 975                         $this->mArticle->openShowCategory();
 976                 }
 977                 $previewOutput = $this->getPreviewText();
 978                 $wgOut->addHTML( $previewOutput );
 979                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
 980                         $this->mArticle->closeShowCategory();
 981                 }
 982                 $wgOut->addHTML( "<br style=\"clear:both;\" />\n" );
 983                 $wgOut->addHTML( '</div>' );
 984         }
 985
 986         /**
 987          * Prepare a list of templates used by this page. Returns HTML.
 988          */
 989         function formatTemplates() {
 990                 global $wgUser;
 991
 992                 $fname = 'EditPage::formatTemplates';
 993                 wfProfileIn( $fname );
 994
 995                 $sk =& $wgUser->getSkin();
 996
 997                 $outText = '';
 998                 $templates = $this->mArticle->getUsedTemplates();
 999                 if ( count( $templates ) > 0 ) {
1000                         # Do a batch existence check
1001                         $batch = new LinkBatch;
1002                         foreach( $templates as $title ) {
1003                                 $batch->addObj( $title );
1004                         }
1005                         $batch->execute();
1006
1007                         # Construct the HTML
1008                         $outText = '<br />'. wfMsg( 'templatesused' ) . '<ul>';
1009                         foreach ( $templates as $titleObj ) {
1010                                 $outText .= '<li>' . $sk->makeLinkObj( $titleObj ) . '</li>';
1011                         }
1012                         $outText .= '</ul>';
1013                 }
1014                 wfProfileOut( $fname );
1015                 return $outText;
1016         }
1017
1018         /**
1019          * Live Preview lets us fetch rendered preview page content and
1020          * add it to the page without refreshing the whole page.
1021          * If not supported by the browser it will fall through to the normal form
1022          * submission method.
1023          *
1024          * This function outputs a script tag to support live preview, and
1025          * returns an onclick handler which should be added to the attributes
1026          * of the preview button
1027          */
1028         function doLivePreviewScript() {
1029                 global $wgStylePath, $wgJsMimeType, $wgOut;
1030                 $wgOut->addHTML( '<script type="'.$wgJsMimeType.'" src="' .
1031                         htmlspecialchars( $wgStylePath . '/common/preview.js' ) .
1032                         '"></script>' . "\n" );
1033                 $liveAction = $wgTitle->getLocalUrl( 'action=submit&wpPreview=true&live=true' );
1034                 return 'onclick="return !livePreview('.
1035                         'getElementById(\'wikiPreview\'),' .
1036                         'editform.wpTextbox1.value,' .
1037                         htmlspecialchars( '"' . $liveAction . '"' ) . ')"';
1038         }
1039
1040         function getLastDelete() {
1041                 $dbr =& wfGetDB( DB_SLAVE );
1042                 $fname = 'EditPage::getLastDelete';
1043                 $res = $dbr->select(
1044                         array( 'logging', 'user' ),
1045                         array( 'log_type',
1046                                'log_action',
1047                                'log_timestamp',
1048                                'log_user',
1049                                'log_namespace',
1050                                'log_title',
1051                                'log_comment',
1052                                'log_params',
1053                                'user_name', ),
1054                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1055                                'log_title' => $this->mTitle->getDBkey(),
1056                                'log_type' => 'delete',
1057                                'log_action' => 'delete',
1058                                'user_id=log_user' ),
1059                         $fname,
1060                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
1061
1062                 if($dbr->numRows($res) == 1) {
1063                         while ( $x = $dbr->fetchObject ( $res ) )
1064                                 $data = $x;
1065                         $dbr->freeResult ( $res ) ;
1066                 } else {
1067                         $data = null;
1068                 }
1069                 return $data;
1070         }
1071
1072         /**
1073          * @todo document
1074          */
1075         function getPreviewText() {
1076                 global $wgOut, $wgUser, $wgTitle, $wgParser;
1077
1078                 $fname = 'EditPage::getPreviewText';
1079                 wfProfileIn( $fname );
1080
1081                 if ( $this->mTokenOk ) {
1082                         $msg = 'previewnote';
1083                 } else {
1084                         $msg = 'session_fail_preview';
1085                 }
1086                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
1087                         "<div class='previewnote'>" . $wgOut->parse( wfMsg( $msg ) ) . "</div>\n";
1088                 if ( $this->isConflict ) {
1089                         $previewhead.='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1090                 }
1091
1092                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1093                 $parserOptions->setEditSection( false );
1094
1095                 # don't parse user css/js, show message about preview
1096                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1097
1098                 if ( $this->isCssJsSubpage ) {
1099                         if(preg_match("/\\.css$/", $wgTitle->getText() ) ) {
1100                                 $previewtext = wfMsg('usercsspreview');
1101                         } else if(preg_match("/\\.js$/", $wgTitle->getText() ) ) {
1102                                 $previewtext = wfMsg('userjspreview');
1103                         }
1104                         $parserOutput = $wgParser->parse( $previewtext , $wgTitle, $parserOptions );
1105                         $wgOut->addHTML( $parserOutput->mText );
1106                         wfProfileOut( $fname );
1107                         return $previewhead;
1108                 } else {
1109                         # if user want to see preview when he edit an article
1110                         if( $wgUser->getOption('previewonfirst') and ($this->textbox1 == '')) {
1111                                 $this->textbox1 = $this->mArticle->getContent();
1112                         }
1113
1114                         $toparse = $this->textbox1;
1115
1116                         # If we're adding a comment, we need to show the
1117                         # summary as the headline
1118                         if($this->section=="new" && $this->summary!="") {
1119                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1120                         }
1121
1122                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData ;
1123
1124                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ) ."\n\n",
1125                                         $wgTitle, $parserOptions );
1126
1127                         $previewHTML = $parserOutput->getText();
1128                         $wgOut->addParserOutputNoText( $parserOutput );
1129
1130                         wfProfileOut( $fname );
1131                         return $previewhead . $previewHTML;
1132                 }
1133         }
1134
1135         /**
1136          * @todo document
1137          */
1138         function blockedIPpage() {
1139                 global $wgOut;
1140                 $wgOut->blockedPage();
1141         }
1142
1143         /**
1144          * @todo document
1145          */
1146         function userNotLoggedInPage() {
1147                 global $wgOut;
1148
1149                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1150                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1151                 $wgOut->setArticleRelated( false );
1152
1153                 $wgOut->addWikiText( wfMsg( 'whitelistedittext' ) );
1154                 $wgOut->returnToMain( false );
1155         }
1156
1157         /**
1158          * @todo document
1159          */
1160         function spamPage ( $match = false )
1161         {
1162                 global $wgOut;
1163                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1164                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1165                 $wgOut->setArticleRelated( false );
1166
1167                 $wgOut->addWikiText( wfMsg( 'spamprotectiontext' ) );
1168                 if ( $match ) {
1169                         $wgOut->addWikiText( wfMsg( 'spamprotectionmatch', "<nowiki>{$match}</nowiki>" ) );
1170                 }
1171                 $wgOut->returnToMain( false );
1172         }
1173
1174         /**
1175          * @access private
1176          * @todo document
1177          */
1178         function mergeChangesInto( &$editText ){
1179                 $fname = 'EditPage::mergeChangesInto';
1180                 wfProfileIn( $fname );
1181
1182                 $db =& wfGetDB( DB_MASTER );
1183
1184                 // This is the revision the editor started from
1185                 $baseRevision = Revision::loadFromTimestamp(
1186                         $db, $this->mArticle->mTitle, $this->edittime );
1187                 if( is_null( $baseRevision ) ) {
1188                         wfProfileOut( $fname );
1189                         return false;
1190                 }
1191                 $baseText = $baseRevision->getText();
1192
1193                 // The current state, we want to merge updates into it
1194                 $currentRevision =  Revision::loadFromTitle(
1195                         $db, $this->mArticle->mTitle );
1196                 if( is_null( $currentRevision ) ) {
1197                         wfProfileOut( $fname );
1198                         return false;
1199                 }
1200                 $currentText = $currentRevision->getText();
1201
1202                 if( wfMerge( $baseText, $editText, $currentText, $result ) ){
1203                         $editText = $result;
1204                         wfProfileOut( $fname );
1205                         return true;
1206                 } else {
1207                         wfProfileOut( $fname );
1208                         return false;
1209                 }
1210         }
1211
1212         /**
1213          * Check if the browser is on a blacklist of user-agents known to
1214          * mangle UTF-8 data on form submission. Returns true if Unicode
1215          * should make it through, false if it's known to be a problem.
1216          * @return bool
1217          * @access private
1218          */
1219         function checkUnicodeCompliantBrowser() {
1220                 global $wgBrowserBlackList;
1221                 if( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
1222                         // No User-Agent header sent? Trust it by default...
1223                         return true;
1224                 }
1225                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1226                 foreach ( $wgBrowserBlackList as $browser ) {
1227                         if ( preg_match($browser, $currentbrowser) ) {
1228                                 return false;
1229                         }
1230                 }
1231                 return true;
1232         }
1233
1234         /**
1235          * Format an anchor fragment as it would appear for a given section name
1236          * @param string $text
1237          * @return string
1238          * @access private
1239          */
1240         function sectionAnchor( $text ) {
1241                 $headline = Sanitizer::decodeCharReferences( $text );
1242                 # strip out HTML
1243                 $headline = preg_replace( '/<.*?' . '>/', '', $headline );
1244                 $headline = trim( $headline );
1245                 $sectionanchor = '#' . urlencode( str_replace( ' ', '_', $headline ) );
1246                 $replacearray = array(
1247                         '%3A' => ':',
1248                         '%' => '.'
1249                 );
1250                 return str_replace(
1251                         array_keys( $replacearray ),
1252                         array_values( $replacearray ),
1253                         $sectionanchor );
1254         }
1255
1256         /**
1257          * Shows a bulletin board style toolbar for common editing functions.
1258          * It can be disabled in the user preferences.
1259          * The necessary JavaScript code can be found in style/wikibits.js.
1260          */
1261         function getEditToolbar() {
1262                 global $wgStylePath, $wgContLang, $wgJsMimeType;
1263
1264                 /**
1265                  * toolarray an array of arrays which each include the filename of
1266                  * the button image (without path), the opening tag, the closing tag,
1267                  * and optionally a sample text that is inserted between the two when no
1268                  * selection is highlighted.
1269                  * The tip text is shown when the user moves the mouse over the button.
1270                  *
1271                  * Already here are accesskeys (key), which are not used yet until someone
1272                  * can figure out a way to make them work in IE. However, we should make
1273                  * sure these keys are not defined on the edit page.
1274                  */
1275                 $toolarray=array(
1276                         array(  'image'=>'button_bold.png',
1277                                         'open'  =>      "\'\'\'",
1278                                         'close' =>      "\'\'\'",
1279                                         'sample'=>      wfMsg('bold_sample'),
1280                                         'tip'   =>      wfMsg('bold_tip'),
1281                                         'key'   =>      'B'
1282                                 ),
1283                         array(  'image'=>'button_italic.png',
1284                                         'open'  =>      "\'\'",
1285                                         'close' =>      "\'\'",
1286                                         'sample'=>      wfMsg('italic_sample'),
1287                                         'tip'   =>      wfMsg('italic_tip'),
1288                                         'key'   =>      'I'
1289                                 ),
1290                         array(  'image'=>'button_link.png',
1291                                         'open'  =>      '[[',
1292                                         'close' =>      ']]',
1293                                         'sample'=>      wfMsg('link_sample'),
1294                                         'tip'   =>      wfMsg('link_tip'),
1295                                         'key'   =>      'L'
1296                                 ),
1297                         array(  'image'=>'button_extlink.png',
1298                                         'open'  =>      '[',
1299                                         'close' =>      ']',
1300                                         'sample'=>      wfMsg('extlink_sample'),
1301                                         'tip'   =>      wfMsg('extlink_tip'),
1302                                         'key'   =>      'X'
1303                                 ),
1304                         array(  'image'=>'button_headline.png',
1305                                         'open'  =>      "\\n== ",
1306                                         'close' =>      " ==\\n",
1307                                         'sample'=>      wfMsg('headline_sample'),
1308                                         'tip'   =>      wfMsg('headline_tip'),
1309                                         'key'   =>      'H'
1310                                 ),
1311                         array(  'image'=>'button_image.png',
1312                                         'open'  =>      '[['.$wgContLang->getNsText(NS_IMAGE).":",
1313                                         'close' =>      ']]',
1314                                         'sample'=>      wfMsg('image_sample'),
1315                                         'tip'   =>      wfMsg('image_tip'),
1316                                         'key'   =>      'D'
1317                                 ),
1318                         array(  'image' =>'button_media.png',
1319                                         'open'  =>      '[['.$wgContLang->getNsText(NS_MEDIA).':',
1320                                         'close' =>      ']]',
1321                                         'sample'=>      wfMsg('media_sample'),
1322                                         'tip'   =>      wfMsg('media_tip'),
1323                                         'key'   =>      'M'
1324                                 ),
1325                         array(  'image' =>'button_math.png',
1326                                         'open'  =>      "\\<math\\>",
1327                                         'close' =>      "\\</math\\>",
1328                                         'sample'=>      wfMsg('math_sample'),
1329                                         'tip'   =>      wfMsg('math_tip'),
1330                                         'key'   =>      'C'
1331                                 ),
1332                         array(  'image' =>'button_nowiki.png',
1333                                         'open'  =>      "\\<nowiki\\>",
1334                                         'close' =>      "\\</nowiki\\>",
1335                                         'sample'=>      wfMsg('nowiki_sample'),
1336                                         'tip'   =>      wfMsg('nowiki_tip'),
1337                                         'key'   =>      'N'
1338                                 ),
1339                         array(  'image' =>'button_sig.png',
1340                                         'open'  =>      '--~~~~',
1341                                         'close' =>      '',
1342                                         'sample'=>      '',
1343                                         'tip'   =>      wfMsg('sig_tip'),
1344                                         'key'   =>      'Y'
1345                                 ),
1346                         array(  'image' =>'button_hr.png',
1347                                         'open'  =>      "\\n----\\n",
1348                                         'close' =>      '',
1349                                         'sample'=>      '',
1350                                         'tip'   =>      wfMsg('hr_tip'),
1351                                         'key'   =>      'R'
1352                                 )
1353                 );
1354                 $toolbar ="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
1355
1356                 $toolbar.="document.writeln(\"<div id='toolbar'>\");\n";
1357                 foreach($toolarray as $tool) {
1358
1359                         $image=$wgStylePath.'/common/images/'.$tool['image'];
1360                         $open=$tool['open'];
1361                         $close=$tool['close'];
1362                         $sample = wfEscapeJsString( $tool['sample'] );
1363
1364                         // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
1365                         // Older browsers show a "speedtip" type message only for ALT.
1366                         // Ideally these should be different, realistically they
1367                         // probably don't need to be.
1368                         $tip = wfEscapeJsString( $tool['tip'] );
1369
1370                         #$key = $tool["key"];
1371
1372                         $toolbar.="addButton('$image','$tip','$open','$close','$sample');\n";
1373                 }
1374
1375                 $toolbar.="document.writeln(\"</div>\");\n";
1376                 $toolbar.="/*]]>*/\n</script>";
1377                 return $toolbar;
1378         }
1379
1380         /**
1381          * Output preview text only. This can be sucked into the edit page
1382          * via JavaScript, and saves the server time rendering the skin as
1383          * well as theoretically being more robust on the client (doesn't
1384          * disturb the edit box's undo history, won't eat your text on
1385          * failure, etc).
1386          *
1387          * @todo This doesn't include category or interlanguage links.
1388          *       Would need to enhance it a bit, maybe wrap them in XML
1389          *       or something... that might also require more skin
1390          *       initialization, so check whether that's a problem.
1391          */
1392         function livePreview() {
1393                 global $wgOut;
1394                 $wgOut->disable();
1395                 header( 'Content-type: text/xml' );
1396                 header( 'Cache-control: no-cache' );
1397                 # FIXME
1398                 echo $this->getPreviewText( false, false );
1399         }
1400
1401
1402         /**
1403          * Get a diff between the current contents of the edit box and the
1404          * version of the page we're editing from.
1405          *
1406          * If this is a section edit, we'll replace the section as for final
1407          * save and then make a comparison.
1408          *
1409          * @return string HTML
1410          */
1411         function getDiff() {
1412                 global $wgUser;
1413
1414                 require_once( 'DifferenceEngine.php' );
1415                 $oldtext = $this->mArticle->fetchContent();
1416                 $newtext = $this->mArticle->replaceSection(
1417                         $this->section, $this->textbox1, $this->summary, $this->edittime );
1418                 $oldtitle = wfMsg( 'currentrev' );
1419                 $newtitle = wfMsg( 'yourtext' );
1420                 if ( $oldtext !== false  || $newtext != '' ) {
1421                         $de = new DifferenceEngine( $this->mTitle );
1422                         $de->setText( $oldtext, $newtext );
1423                         $difftext = $de->getDiff( $oldtitle, $newtitle );
1424                 } else {
1425                         $difftext = '';
1426                 }
1427
1428                 return '<div id="wikiDiff">' . $difftext . '</div>';
1429         }
1430
1431         /**
1432          * Filter an input field through a Unicode de-armoring process if it
1433          * came from an old browser with known broken Unicode editing issues.
1434          *
1435          * @param WebRequest $request
1436          * @param string $field
1437          * @return string
1438          * @access private
1439          */
1440         function safeUnicodeInput( $request, $field ) {
1441                 $text = rtrim( $request->getText( $field ) );
1442                 return $request->getBool( 'safemode' )
1443                         ? $this->unmakesafe( $text )
1444                         : $text;
1445         }
1446
1447         /**
1448          * Filter an output field through a Unicode armoring process if it is
1449          * going to an old browser with known broken Unicode editing issues.
1450          *
1451          * @param string $text
1452          * @return string
1453          * @access private
1454          */
1455         function safeUnicodeOutput( $text ) {
1456                 global $wgContLang;
1457                 $codedText = $wgContLang->recodeForEdit( $text );
1458                 return $this->checkUnicodeCompliantBrowser()
1459                         ? $codedText
1460                         : $this->makesafe( $codedText );
1461         }
1462
1463         /**
1464          * A number of web browsers are known to corrupt non-ASCII characters
1465          * in a UTF-8 text editing environment. To protect against this,
1466          * detected browsers will be served an armored version of the text,
1467          * with non-ASCII chars converted to numeric HTML character references.
1468          *
1469          * Preexisting such character references will have a 0 added to them
1470          * to ensure that round-trips do not alter the original data.
1471          *
1472          * @param string $invalue
1473          * @return string
1474          * @access private
1475          */
1476         function makesafe( $invalue ) {
1477                 // Armor existing references for reversability.
1478                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
1479
1480                 $bytesleft = 0;
1481                 $result = "";
1482                 $working = 0;
1483                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1484                         $bytevalue = ord( $invalue{$i} );
1485                         if( $bytevalue <= 0x7F ) { //0xxx xxxx
1486                                 $result .= chr( $bytevalue );
1487                                 $bytesleft = 0;
1488                         } elseif( $bytevalue <= 0xBF ) { //10xx xxxx
1489                                 $working = $working << 6;
1490                                 $working += ($bytevalue & 0x3F);
1491                                 $bytesleft--;
1492                                 if( $bytesleft <= 0 ) {
1493                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
1494                                 }
1495                         } elseif( $bytevalue <= 0xDF ) { //110x xxxx
1496                                 $working = $bytevalue & 0x1F;
1497                                 $bytesleft = 1;
1498                         } elseif( $bytevalue <= 0xEF ) { //1110 xxxx
1499                                 $working = $bytevalue & 0x0F;
1500                                 $bytesleft = 2;
1501                         } else { //1111 0xxx
1502                                 $working = $bytevalue & 0x07;
1503                                 $bytesleft = 3;
1504                         }
1505                 }
1506                 return $result;
1507         }
1508
1509         /**
1510          * Reverse the previously applied transliteration of non-ASCII characters
1511          * back to UTF-8. Used to protect data from corruption by broken web browsers
1512          * as listed in $wgBrowserBlackList.
1513          *
1514          * @param string $invalue
1515          * @return string
1516          * @access private
1517          */
1518         function unmakesafe( $invalue ) {
1519                 $result = "";
1520                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1521                         if( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
1522                                 $i += 3;
1523                                 $hexstring = "";
1524                                 do {
1525                                         $hexstring .= $invalue{$i};
1526                                         $i++;
1527                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
1528
1529                                 // Do some sanity checks. These aren't needed for reversability,
1530                                 // but should help keep the breakage down if the editor
1531                                 // breaks one of the entities whilst editing.
1532                                 if ((substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6)) {
1533                                         $codepoint = hexdec($hexstring);
1534                                         $result .= codepointToUtf8( $codepoint );
1535                                 } else {
1536                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
1537                                 }
1538                         } else {
1539                                 $result .= substr( $invalue, $i, 1 );
1540                         }
1541                 }
1542                 // reverse the transform that we made for reversability reasons.
1543                 return strtr( $result, array( "&#x0" => "&#x" ) );
1544         }
1545
1546         function noCreatePermission() {
1547                 global $wgOut;
1548                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
1549                 $wgOut->addWikiText( wfMsg( 'nocreatetext' ) );
1550         }
1551
1552 }
1553
1554 ?>