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         var $tooBig = false;
  28         var $kblength = false;
  29
  30         # Form values
  31         var $save = false, $preview = false, $diff = false;
  32         var $minoredit = false, $watchthis = false, $recreate = false;
  33         var $textbox1 = '', $textbox2 = '', $summary = '';
  34         var $edittime = '', $section = '', $starttime = '';
  35         var $oldid = 0, $editintro = '', $scrolltop = null;
  36
  37         /**
  38          * @todo document
  39          * @param $article
  40          */
  41         function EditPage( $article ) {
  42                 $this->mArticle =& $article;
  43                 global $wgTitle;
  44                 $this->mTitle =& $wgTitle;
  45         }
  46
  47         /**
  48          * This is the function that extracts metadata from the article body on the first view.
  49          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
  50          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
  51          */
  52         function extractMetaDataFromArticle () {
  53                 global $wgUseMetadataEdit , $wgMetadataWhitelist , $wgLang ;
  54                 $this->mMetaData = '' ;
  55                 if ( !$wgUseMetadataEdit ) return ;
  56                 if ( $wgMetadataWhitelist == '' ) return ;
  57                 $s = '' ;
  58                 $t = $this->mArticle->getContent();
  59
  60                 # MISSING : <nowiki> filtering
  61
  62                 # Categories and language links
  63                 $t = explode ( "\n" , $t ) ;
  64                 $catlow = strtolower ( $wgLang->getNsText ( NS_CATEGORY ) ) ;
  65                 $cat = $ll = array() ;
  66                 foreach ( $t AS $key => $x )
  67                 {
  68                         $y = trim ( strtolower ( $x ) ) ;
  69                         while ( substr ( $y , 0 , 2 ) == '[[' )
  70                         {
  71                                 $y = explode ( ']]' , trim ( $x ) ) ;
  72                                 $first = array_shift ( $y ) ;
  73                                 $first = explode ( ':' , $first ) ;
  74                                 $ns = array_shift ( $first ) ;
  75                                 $ns = trim ( str_replace ( '[' , '' , $ns ) ) ;
  76                                 if ( strlen ( $ns ) == 2 OR strtolower ( $ns ) == $catlow )
  77                                 {
  78                                         $add = '[[' . $ns . ':' . implode ( ':' , $first ) . ']]' ;
  79                                         if ( strtolower ( $ns ) == $catlow ) $cat[] = $add ;
  80                                         else $ll[] = $add ;
  81                                         $x = implode ( ']]' , $y ) ;
  82                                         $t[$key] = $x ;
  83                                         $y = trim ( strtolower ( $x ) ) ;
  84                                 }
  85                         }
  86                 }
  87                 if ( count ( $cat ) ) $s .= implode ( ' ' , $cat ) . "\n" ;
  88                 if ( count ( $ll ) ) $s .= implode ( ' ' , $ll ) . "\n" ;
  89                 $t = implode ( "\n" , $t ) ;
  90
  91                 # Load whitelist
  92                 $sat = array () ; # stand-alone-templates; must be lowercase
  93                 $wl_title = Title::newFromText ( $wgMetadataWhitelist ) ;
  94                 $wl_article = new Article ( $wl_title ) ;
  95                 $wl = explode ( "\n" , $wl_article->getContent() ) ;
  96                 foreach ( $wl AS $x )
  97                 {
  98                         $isentry = false ;
  99                         $x = trim ( $x ) ;
 100                         while ( substr ( $x , 0 , 1 ) == '*' )
 101                         {
 102                                 $isentry = true ;
 103                                 $x = trim ( substr ( $x , 1 ) ) ;
 104                         }
 105                         if ( $isentry )
 106                         {
 107                                 $sat[] = strtolower ( $x ) ;
 108                         }
 109
 110                 }
 111
 112                 # Templates, but only some
 113                 $t = explode ( '{{' , $t ) ;
 114                 $tl = array () ;
 115                 foreach ( $t AS $key => $x )
 116                 {
 117                         $y = explode ( '}}' , $x , 2 ) ;
 118                         if ( count ( $y ) == 2 )
 119                         {
 120                                 $z = $y[0] ;
 121                                 $z = explode ( '|' , $z ) ;
 122                                 $tn = array_shift ( $z ) ;
 123                                 if ( in_array ( strtolower ( $tn ) , $sat ) )
 124                                 {
 125                                         $tl[] = '{{' . $y[0] . '}}' ;
 126                                         $t[$key] = $y[1] ;
 127                                         $y = explode ( '}}' , $y[1] , 2 ) ;
 128                                 }
 129                                 else $t[$key] = '{{' . $x ;
 130                         }
 131                         else if ( $key != 0 ) $t[$key] = '{{' . $x ;
 132                         else $t[$key] = $x ;
 133                 }
 134                 if ( count ( $tl ) ) $s .= implode ( ' ' , $tl ) ;
 135                 $t = implode ( '' , $t ) ;
 136
 137                 $t = str_replace ( "\n\n\n" , "\n" , $t ) ;
 138                 $this->mArticle->mContent = $t ;
 139                 $this->mMetaData = $s ;
 140         }
 141
 142         function submit() {
 143                 $this->edit();
 144         }
 145
 146         /**
 147          * This is the function that gets called for "action=edit". It
 148          * sets up various member variables, then passes execution to
 149          * another function, usually showEditForm()
 150          *
 151          * The edit form is self-submitting, so that when things like
 152          * preview and edit conflicts occur, we get the same form back
 153          * with the extra stuff added.  Only when the final submission
 154          * is made and all is well do we actually save and redirect to
 155          * the newly-edited page.
 156          */
 157         function edit() {
 158                 global $wgOut, $wgUser, $wgRequest, $wgTitle,
 159                        $wgEmailConfirmToEdit;
 160
 161                 if ( ! wfRunHooks( 'AlternateEdit', array( &$this  ) ) )
 162                         return;
 163
 164                 $fname = 'EditPage::edit';
 165                 wfProfileIn( $fname );
 166                 wfDebug( "$fname: enter\n" );
 167
 168                 // this is not an article
 169                 $wgOut->setArticleFlag(false);
 170
 171                 $this->importFormData( $wgRequest );
 172                 $this->firsttime = false;
 173
 174                 if( $this->live ) {
 175                         $this->livePreview();
 176                         wfProfileOut( $fname );
 177                         return;
 178                 }
 179
 180                 if ( ! $this->mTitle->userCanEdit() ) {
 181                         wfDebug( "$fname: user can't edit\n" );
 182                         $wgOut->readOnlyPage( $this->mArticle->getContent(), true );
 183                         wfProfileOut( $fname );
 184                         return;
 185                 }
 186                 wfDebug( "$fname: Checking blocks\n" );
 187                 if ( !$this->preview && !$this->diff && $wgUser->isBlockedFrom( $this->mTitle, !$this->save ) ) {
 188                         # When previewing, don't check blocked state - will get caught at save time.
 189                         # Also, check when starting edition is done against slave to improve performance.
 190                         wfDebug( "$fname: user is blocked\n" );
 191                         $wgOut->blockedPage();
 192                         wfProfileOut( $fname );
 193                         return;
 194                 }
 195                 if ( !$wgUser->isAllowed('edit') ) {
 196                         if ( $wgUser->isAnon() ) {
 197                                 wfDebug( "$fname: user must log in\n" );
 198                                 $this->userNotLoggedInPage();
 199                                 wfProfileOut( $fname );
 200                                 return;
 201                         } else {
 202                                 wfDebug( "$fname: read-only page\n" );
 203                                 $wgOut->readOnlyPage( $this->mArticle->getContent(), true );
 204                                 wfProfileOut( $fname );
 205                                 return;
 206                         }
 207                 }
 208                 if ($wgEmailConfirmToEdit && !$wgUser->isEmailConfirmed()) {
 209                         wfDebug("$fname: user must confirm e-mail address\n");
 210                         $this->userNotConfirmedPage();
 211                         wfProfileOut($fname);
 212                         return;
 213                 }
 214                 if ( !$this->mTitle->userCan( 'create' ) && !$this->mTitle->exists() ) {
 215                         wfDebug( "$fname: no create permission\n" );
 216                         $this->noCreatePermission();
 217                         wfProfileOut( $fname );
 218                         return;
 219                 }
 220                 if ( wfReadOnly() ) {
 221                         wfDebug( "$fname: read-only mode is engaged\n" );
 222                         if( $this->save || $this->preview ) {
 223                                 $this->formtype = 'preview';
 224                         } else if ( $this->diff ) {
 225                                 $this->formtype = 'diff';
 226                         } else {
 227                                 $wgOut->readOnlyPage( $this->mArticle->getContent() );
 228                                 wfProfileOut( $fname );
 229                                 return;
 230                         }
 231                 } else {
 232                         if ( $this->save ) {
 233                                 $this->formtype = 'save';
 234                         } else if ( $this->preview ) {
 235                                 $this->formtype = 'preview';
 236                         } else if ( $this->diff ) {
 237                                 $this->formtype = 'diff';
 238                         } else { # First time through
 239                                 $this->firsttime = true;
 240                                 if( $this->previewOnOpen() ) {
 241                                         $this->formtype = 'preview';
 242                                 } else {
 243                                         $this->extractMetaDataFromArticle () ;
 244                                         $this->formtype = 'initial';
 245                                 }
 246                         }
 247                 }
 248
 249                 wfProfileIn( "$fname-business-end" );
 250
 251                 $this->isConflict = false;
 252                 // css / js subpages of user pages get a special treatment
 253                 $this->isCssJsSubpage      = $wgTitle->isCssJsSubpage();
 254                 $this->isValidCssJsSubpage = $wgTitle->isValidCssJsSubpage();
 255
 256                 /* Notice that we can't use isDeleted, because it returns true if article is ever deleted
 257                  * no matter it's current state
 258                  */
 259                 $this->deletedSinceEdit = false;
 260                 if ( $this->edittime != '' ) {
 261                         /* Note that we rely on logging table, which hasn't been always there,
 262                          * but that doesn't matter, because this only applies to brand new
 263                          * deletes. This is done on every preview and save request. Move it further down
 264                          * to only perform it on saves
 265                          */
 266                         if ( $this->mTitle->isDeleted() ) {
 267                                 $this->lastDelete = $this->getLastDelete();
 268                                 if ( !is_null($this->lastDelete) ) {
 269                                         $deletetime = $this->lastDelete->log_timestamp;
 270                                         if ( ($deletetime - $this->starttime) > 0 ) {
 271                                                 $this->deletedSinceEdit = true;
 272                                         }
 273                                 }
 274                         }
 275                 }
 276
 277                 if(!$this->mTitle->getArticleID() && ('initial' == $this->formtype || $this->firsttime )) { # new article
 278                         $this->showIntro();
 279                 }
 280                 if( $this->mTitle->isTalkPage() ) {
 281                         $wgOut->addWikiText( wfMsg( 'talkpagetext' ) );
 282                 }
 283
 284                 # Attempt submission here.  This will check for edit conflicts,
 285                 # and redundantly check for locked database, blocked IPs, etc.
 286                 # that edit() already checked just in case someone tries to sneak
 287                 # in the back door with a hand-edited submission URL.
 288
 289                 if ( 'save' == $this->formtype ) {
 290                         if ( !$this->attemptSave() ) {
 291                                 wfProfileOut( "$fname-business-end" );
 292                                 wfProfileOut( $fname );
 293                                 return;
 294                         }
 295                 }
 296
 297                 # First time through: get contents, set time for conflict
 298                 # checking, etc.
 299                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 300                         $this->initialiseForm();
 301                 }
 302
 303                 $this->showEditForm();
 304                 wfProfileOut( "$fname-business-end" );
 305                 wfProfileOut( $fname );
 306         }
 307
 308         /**
 309          * Return true if this page should be previewed when the edit form
 310          * is initially opened.
 311          * @return bool
 312          * @access private
 313          */
 314         function previewOnOpen() {
 315                 global $wgUser;
 316                 return $this->section != 'new' &&
 317                         ( ( $wgUser->getOption( 'previewonfirst' ) && $this->mTitle->exists() ) ||
 318                                 ( $this->mTitle->getNamespace() == NS_CATEGORY &&
 319                                         !$this->mTitle->exists() ) );
 320         }
 321
 322         /**
 323          * @todo document
 324          */
 325         function importFormData( &$request ) {
 326                 global $wgLang ;
 327                 $fname = 'EditPage::importFormData';
 328                 wfProfileIn( $fname );
 329
 330                 if( $request->wasPosted() ) {
 331                         # These fields need to be checked for encoding.
 332                         # Also remove trailing whitespace, but don't remove _initial_
 333                         # whitespace from the text boxes. This may be significant formatting.
 334                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 335                         $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
 336                         $this->mMetaData = rtrim( $request->getText( 'metadata'   ) );
 337                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 338                         $this->summary   = $wgLang->truncate( $request->getText( 'wpSummary'  ), 250 );
 339
 340                         $this->edittime = $request->getVal( 'wpEdittime' );
 341                         $this->starttime = $request->getVal( 'wpStarttime' );
 342
 343                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 344
 345                         if( is_null( $this->edittime ) ) {
 346                                 # If the form is incomplete, force to preview.
 347                                 wfDebug( "$fname: Form data appears to be incomplete\n" );
 348                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 349                                 $this->preview  = true;
 350                         } else {
 351                                 /* Fallback for live preview */
 352                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 353                                 $this->diff = $request->getCheck( 'wpDiff' );
 354
 355                                 if( !$this->preview ) {
 356                                         if ( $this->tokenOk( $request ) ) {
 357                                                 # Some browsers will not report any submit button
 358                                                 # if the user hits enter in the comment box.
 359                                                 # The unmarked state will be assumed to be a save,
 360                                                 # if the form seems otherwise complete.
 361                                                 wfDebug( "$fname: Passed token check.\n" );
 362                                         } else {
 363                                                 # Page might be a hack attempt posted from
 364                                                 # an external site. Preview instead of saving.
 365                                                 wfDebug( "$fname: Failed token check; forcing preview\n" );
 366                                                 $this->preview = true;
 367                                         }
 368                                 }
 369                         }
 370                         $this->save    = ! ( $this->preview OR $this->diff );
 371                         if( !preg_match( '/^\d{14}$/', $this->edittime )) {
 372                                 $this->edittime = null;
 373                         }
 374
 375                         if( !preg_match( '/^\d{14}$/', $this->starttime )) {
 376                                 $this->starttime = null;
 377                         }
 378
 379                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 380
 381                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 382                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 383                 } else {
 384                         # Not a posted form? Start with nothing.
 385                         wfDebug( "$fname: Not a posted form.\n" );
 386                         $this->textbox1  = '';
 387                         $this->textbox2  = '';
 388                         $this->mMetaData = '';
 389                         $this->summary   = '';
 390                         $this->edittime  = '';
 391                         $this->starttime = wfTimestampNow();
 392                         $this->preview   = false;
 393                         $this->save      = false;
 394                         $this->diff      = false;
 395                         $this->minoredit = false;
 396                         $this->watchthis = false;
 397                         $this->recreate  = false;
 398                 }
 399
 400                 $this->oldid = $request->getInt( 'oldid' );
 401
 402                 # Section edit can come from either the form or a link
 403                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 404
 405                 $this->live = $request->getCheck( 'live' );
 406                 $this->editintro = $request->getText( 'editintro' );
 407
 408                 wfProfileOut( $fname );
 409         }
 410
 411         /**
 412          * Make sure the form isn't faking a user's credentials.
 413          *
 414          * @param WebRequest $request
 415          * @return bool
 416          * @access private
 417          */
 418         function tokenOk( &$request ) {
 419                 global $wgUser;
 420                 if( $wgUser->isAnon() ) {
 421                         # Anonymous users may not have a session
 422                         # open. Don't tokenize.
 423                         $this->mTokenOk = true;
 424                 } else {
 425                         $this->mTokenOk = $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
 426                 }
 427                 return $this->mTokenOk;
 428         }
 429
 430         function showIntro() {
 431                 global $wgOut, $wgUser;
 432                 $addstandardintro=true;
 433                 if($this->editintro) {
 434                         $introtitle=Title::newFromText($this->editintro);
 435                         if(isset($introtitle) && $introtitle->userCanRead()) {
 436                                 $rev=Revision::newFromTitle($introtitle);
 437                                 if($rev) {
 438                                         $wgOut->addSecondaryWikiText($rev->getText());
 439                                         $addstandardintro=false;
 440                                 }
 441                         }
 442                 }
 443                 if($addstandardintro) {
 444                         if ( $wgUser->isLoggedIn() )
 445                                 $wgOut->addWikiText( wfMsg( 'newarticletext' ) );
 446                         else
 447                                 $wgOut->addWikiText( wfMsg( 'newarticletextanon' ) );
 448                 }
 449         }
 450
 451         /**
 452          * Attempt submission
 453          * @return bool false if output is done, true if the rest of the form should be displayed
 454          */
 455         function attemptSave() {
 456                 global $wgSpamRegex, $wgFilterCallback, $wgUser, $wgOut;
 457                 global $wgMaxArticleSize;
 458
 459                 $fname = 'EditPage::attemptSave';
 460                 wfProfileIn( $fname );
 461                 wfProfileIn( "$fname-checks" );
 462
 463                 # Reintegrate metadata
 464                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 465                 $this->mMetaData = '' ;
 466
 467                 # Check for spam
 468                 if ( $wgSpamRegex && preg_match( $wgSpamRegex, $this->textbox1, $matches ) ) {
 469                         $this->spamPage ( $matches[0] );
 470                         wfProfileOut( "$fname-checks" );
 471                         wfProfileOut( $fname );
 472                         return false;
 473                 }
 474                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section ) ) {
 475                         # Error messages or other handling should be performed by the filter function
 476                         wfProfileOut( $fname );
 477                         wfProfileOut( "$fname-checks" );
 478                         return false;
 479                 }
 480                 if ( !wfRunHooks( 'EditFilter', array( &$this, $this->textbox1, $this->section ) ) ) {
 481                         # Error messages or other handling should be performed by the filter function
 482                         wfProfileOut( $fname );
 483                         wfProfileOut( "$fname-checks" );
 484                         return false;
 485                 }
 486                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 487                         # Check block state against master, thus 'false'.
 488                         $this->blockedIPpage();
 489                         wfProfileOut( "$fname-checks" );
 490                         wfProfileOut( $fname );
 491                         return false;
 492                 }
 493                 $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 494                 if ( $this->kblength > $wgMaxArticleSize ) {
 495                         // Error will be displayed by showEditForm()
 496                         $this->tooBig = true;
 497                         wfProfileOut( "$fname-checks" );
 498                         wfProfileOut( $fname );
 499                         return true;
 500                 }
 501
 502                 if ( !$wgUser->isAllowed('edit') ) {
 503                         if ( $wgUser->isAnon() ) {
 504                                 $this->userNotLoggedInPage();
 505                                 wfProfileOut( "$fname-checks" );
 506                                 wfProfileOut( $fname );
 507                                 return false;
 508                         }
 509                         else {
 510                                 $wgOut->readOnlyPage();
 511                                 wfProfileOut( "$fname-checks" );
 512                                 wfProfileOut( $fname );
 513                                 return false;
 514                         }
 515                 }
 516
 517                 if ( wfReadOnly() ) {
 518                         $wgOut->readOnlyPage();
 519                         wfProfileOut( "$fname-checks" );
 520                         wfProfileOut( $fname );
 521                         return false;
 522                 }
 523                 if ( $wgUser->pingLimiter() ) {
 524                         $wgOut->rateLimited();
 525                         wfProfileOut( "$fname-checks" );
 526                         wfProfileOut( $fname );
 527                         return false;
 528                 }
 529
 530                 # If the article has been deleted while editing, don't save it without
 531                 # confirmation
 532                 if ( $this->deletedSinceEdit && !$this->recreate ) {
 533                         wfProfileOut( "$fname-checks" );
 534                         wfProfileOut( $fname );
 535                         return true;
 536                 }
 537
 538                 wfProfileOut( "$fname-checks" );
 539
 540                 # If article is new, insert it.
 541                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 542                 if ( 0 == $aid ) {
 543                         // Late check for create permission, just in case *PARANOIA*
 544                         if ( !$this->mTitle->userCan( 'create' ) ) {
 545                                 wfDebug( "$fname: no create permission\n" );
 546                                 $this->noCreatePermission();
 547                                 wfProfileOut( $fname );
 548                                 return;
 549                         }
 550
 551                         # Don't save a new article if it's blank.
 552                         if ( ( '' == $this->textbox1 ) ) {
 553                                         $wgOut->redirect( $this->mTitle->getFullURL() );
 554                                         wfProfileOut( $fname );
 555                                         return false;
 556                         }
 557
 558                         $isComment=($this->section=='new');
 559                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 560                                 $this->minoredit, $this->watchthis, false, $isComment);
 561
 562                         wfProfileOut( $fname );
 563                         return false;
 564                 }
 565
 566                 # Article exists. Check for edit conflict.
 567
 568                 $this->mArticle->clear(); # Force reload of dates, etc.
 569                 $this->mArticle->forUpdate( true ); # Lock the article
 570
 571                 if( $this->mArticle->getTimestamp() != $this->edittime ) {
 572                         $this->isConflict = true;
 573                         if( $this->section == 'new' ) {
 574                                 if( $this->mArticle->getUserText() == $wgUser->getName() &&
 575                                         $this->mArticle->getComment() == $this->summary ) {
 576                                         // Probably a duplicate submission of a new comment.
 577                                         // This can happen when squid resends a request after
 578                                         // a timeout but the first one actually went through.
 579                                         wfDebug( "EditPage::editForm duplicate new section submission; trigger edit conflict!\n" );
 580                                 } else {
 581                                         // New comment; suppress conflict.
 582                                         $this->isConflict = false;
 583                                         wfDebug( "EditPage::editForm conflict suppressed; new section\n" );
 584                                 }
 585                         }
 586                 }
 587                 $userid = $wgUser->getID();
 588
 589                 if ( $this->isConflict) {
 590                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 591                                 $this->mArticle->getTimestamp() . "'\n" );
 592                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime);
 593                 }
 594                 else {
 595                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 596                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary);
 597                 }
 598                 if( is_null( $text ) ) {
 599                         wfDebug( "EditPage::editForm activating conflict; section replace failed.\n" );
 600                         $this->isConflict = true;
 601                         $text = $this->textbox1;
 602                 }
 603
 604                 # Suppress edit conflict with self, except for section edits where merging is required.
 605                 if ( ( $this->section == '' ) && ( 0 != $userid ) && ( $this->mArticle->getUser() == $userid ) ) {
 606                         wfDebug( "Suppressing edit conflict, same user.\n" );
 607                         $this->isConflict = false;
 608                 } else {
 609                         # switch from section editing to normal editing in edit conflict
 610                         if($this->isConflict) {
 611                                 # Attempt merge
 612                                 if( $this->mergeChangesInto( $text ) ){
 613                                         // Successful merge! Maybe we should tell the user the good news?
 614                                         $this->isConflict = false;
 615                                         wfDebug( "Suppressing edit conflict, successful merge.\n" );
 616                                 } else {
 617                                         $this->section = '';
 618                                         $this->textbox1 = $text;
 619                                         wfDebug( "Keeping edit conflict, failed merge.\n" );
 620                                 }
 621                         }
 622                 }
 623
 624                 if ( $this->isConflict ) {
 625                         wfProfileOut( $fname );
 626                         return true;
 627                 }
 628
 629                 # All's well
 630                 wfProfileIn( "$fname-sectionanchor" );
 631                 $sectionanchor = '';
 632                 if( $this->section == 'new' ) {
 633                         if( $this->summary != '' ) {
 634                                 $sectionanchor = $this->sectionAnchor( $this->summary );
 635                         }
 636                 } elseif( $this->section != '' ) {
 637                         # Try to get a section anchor from the section source, redirect to edited section if header found
 638                         # XXX: might be better to integrate this into Article::replaceSection
 639                         # for duplicate heading checking and maybe parsing
 640                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 641                         # we can't deal with anchors, includes, html etc in the header for now,
 642                         # headline would need to be parsed to improve this
 643                         if($hasmatch and strlen($matches[2]) > 0) {
 644                                 $sectionanchor = $this->sectionAnchor( $matches[2] );
 645                         }
 646                 }
 647                 wfProfileOut( "$fname-sectionanchor" );
 648
 649                 // Save errors may fall down to the edit form, but we've now
 650                 // merged the section into full text. Clear the section field
 651                 // so that later submission of conflict forms won't try to
 652                 // replace that into a duplicated mess.
 653                 $this->textbox1 = $text;
 654                 $this->section = '';
 655
 656                 // Check for length errors again now that the section is merged in
 657                 $this->kblength = (int)(strlen( $text ) / 1024);
 658                 if ( $this->kblength > $wgMaxArticleSize ) {
 659                         $this->tooBig = true;
 660                         wfProfileOut( $fname );
 661                         return true;
 662                 }
 663
 664                 # update the article here
 665                 if( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
 666                         $this->watchthis, '', $sectionanchor ) ) {
 667                         wfProfileOut( $fname );
 668                         return false;
 669                 } else {
 670                         $this->isConflict = true;
 671                 }
 672                 wfProfileOut( $fname );
 673                 return true;
 674         }
 675
 676         /**
 677          * Initialise form fields in the object
 678          * Called on the first invocation, e.g. when a user clicks an edit link
 679          */
 680         function initialiseForm() {
 681                 $this->edittime = $this->mArticle->getTimestamp();
 682                 $this->textbox1 = $this->mArticle->getContent();
 683                 $this->summary = '';
 684                 if ( !$this->mArticle->exists() && $this->mArticle->mTitle->getNamespace() == NS_MEDIAWIKI )
 685                         $this->textbox1 = wfMsgWeirdKey ( $this->mArticle->mTitle->getText() ) ;
 686                 wfProxyCheck();
 687         }
 688
 689         /**
 690          * Send the edit form and related headers to $wgOut
 691          * @param $formCallback Optional callable that takes an OutputPage
 692          *                      parameter; will be called during form output
 693          *                      near the top, for captchas and the like.
 694          */
 695         function showEditForm( $formCallback=null ) {
 696                 global $wgOut, $wgUser, $wgLang, $wgContLang, $wgMaxArticleSize;
 697
 698                 $fname = 'EditPage::showEditForm';
 699                 wfProfileIn( $fname );
 700
 701                 $sk =& $wgUser->getSkin();
 702
 703                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) ) ;
 704
 705                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 706
 707                 # Enabled article-related sidebar, toplinks, etc.
 708                 $wgOut->setArticleRelated( true );
 709
 710                 if ( $this->isConflict ) {
 711                         $s = wfMsg( 'editconflict', $this->mTitle->getPrefixedText() );
 712                         $wgOut->setPageTitle( $s );
 713                         $wgOut->addWikiText( wfMsg( 'explainconflict' ) );
 714
 715                         $this->textbox2 = $this->textbox1;
 716                         $this->textbox1 = $this->mArticle->getContent();
 717                         $this->edittime = $this->mArticle->getTimestamp();
 718                 } else {
 719
 720                         if( $this->section != '' ) {
 721                                 if( $this->section == 'new' ) {
 722                                         $s = wfMsg('editingcomment', $this->mTitle->getPrefixedText() );
 723                                 } else {
 724                                         $s = wfMsg('editingsection', $this->mTitle->getPrefixedText() );
 725                                         if( !$this->preview && !$this->diff ) {
 726                                                 preg_match( "/^(=+)(.+)\\1/mi",
 727                                                         $this->textbox1,
 728                                                         $matches );
 729                                                 if( !empty( $matches[2] ) ) {
 730                                                         $this->summary = "/* ". trim($matches[2])." */ ";
 731                                                 }
 732                                         }
 733                                 }
 734                         } else {
 735                                 $s = wfMsg( 'editing', $this->mTitle->getPrefixedText() );
 736                         }
 737                         $wgOut->setPageTitle( $s );
 738                         if ( !$this->checkUnicodeCompliantBrowser() ) {
 739                                 $wgOut->addWikiText( wfMsg( 'nonunicodebrowser') );
 740                         }
 741                         if ( isset( $this->mArticle )
 742                              && isset( $this->mArticle->mRevision )
 743                              && !$this->mArticle->mRevision->isCurrent() ) {
 744                                 $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
 745                                 $wgOut->addWikiText( wfMsg( 'editingold' ) );
 746                         }
 747                 }
 748
 749                 if( wfReadOnly() ) {
 750                         $wgOut->addWikiText( wfMsg( 'readonlywarning' ) );
 751                 } elseif( $wgUser->isAnon() && $this->formtype != 'preview' ) {
 752                         $wgOut->addWikiText( wfMsg( 'anoneditwarning' ) );
 753                 } else {
 754                         if( $this->isCssJsSubpage && $this->formtype != 'preview' ) {
 755                                 # Check the skin exists
 756                                 if( $this->isValidCssJsSubpage ) {
 757                                         $wgOut->addWikiText( wfMsg( 'usercssjsyoucanpreview' ) );
 758                                 } else {
 759                                         $wgOut->addWikiText( wfMsg( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
 760                                 }
 761                         }
 762                 }
 763
 764                 if( $this->mTitle->isProtected( 'edit' ) ) {
 765                         if( $this->mTitle->isSemiProtected() ) {
 766                                 $notice = wfMsg( 'semiprotectedpagewarning' );
 767                                 if( wfEmptyMsg( 'semiprotectedpagewarning', $notice ) || $notice == '-' ) {
 768                                         $notice = '';
 769                                 }
 770                         } else {
 771                                 $notice = wfMsg( 'protectedpagewarning' );
 772                         }
 773                         $wgOut->addWikiText( $notice );
 774                 }
 775
 776                 if ( $this->kblength === false ) {
 777                         $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 778                 }
 779                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
 780                         $wgOut->addWikiText( wfMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgMaxArticleSize ) );
 781                 } elseif( $this->kblength > 29 ) {
 782                         $wgOut->addWikiText( wfMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) ) );
 783                 }
 784
 785                 $rows = $wgUser->getOption( 'rows' );
 786                 $cols = $wgUser->getOption( 'cols' );
 787
 788                 $ew = $wgUser->getOption( 'editwidth' );
 789                 if ( $ew ) $ew = " style=\"width:100%\"";
 790                 else $ew = '';
 791
 792                 $q = 'action=submit';
 793                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
 794                 $action = $this->mTitle->escapeLocalURL( $q );
 795
 796                 $summary = wfMsg('summary');
 797                 $subject = wfMsg('subject');
 798                 $minor   = wfMsg('minoredit');
 799                 $watchthis = wfMsg ('watchthis');
 800
 801                 $cancel = $sk->makeKnownLink( $this->mTitle->getPrefixedText(),
 802                                 wfMsg('cancel') );
 803                 $edithelpurl = $sk->makeInternalOrExternalUrl( wfMsg( 'edithelppage' ));
 804                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
 805                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
 806                         htmlspecialchars( wfMsg( 'newwindow' ) );
 807
 808                 global $wgRightsText;
 809                 $copywarn = "<div id=\"editpage-copywarn\">\n" .
 810                         wfMsg( $wgRightsText ? 'copyrightwarning' : 'copyrightwarning2',
 811                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
 812                                 $wgRightsText ) . "\n</div>";
 813
 814                 if( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
 815                         # prepare toolbar for edit buttons
 816                         $toolbar = $this->getEditToolbar();
 817                 } else {
 818                         $toolbar = '';
 819                 }
 820
 821                 // activate checkboxes if user wants them to be always active
 822                 if( !$this->preview && !$this->diff ) {
 823                         if( $wgUser->getOption( 'watchdefault' ) ) $this->watchthis = true;
 824                         if( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
 825
 826                         // activate checkbox also if user is already watching the page,
 827                         // require wpWatchthis to be unset so that second condition is not
 828                         // checked unnecessarily
 829                         if( !$this->watchthis && $this->mTitle->userIsWatching() ) $this->watchthis = true;
 830                 }
 831
 832                 $minoredithtml = '';
 833
 834                 if ( $wgUser->isAllowed('minoredit') ) {
 835                         $minoredithtml =
 836                                 "<input tabindex='3' type='checkbox' value='1' name='wpMinoredit'".($this->minoredit?" checked='checked'":"").
 837                                 " accesskey='".wfMsg('accesskey-minoredit')."' id='wpMinoredit' />".
 838                                 "<label for='wpMinoredit' title='".wfMsg('tooltip-minoredit')."'>{$minor}</label>";
 839                 }
 840
 841                 $watchhtml = '';
 842
 843                 if ( $wgUser->isLoggedIn() ) {
 844                         $watchhtml = "<input tabindex='4' type='checkbox' name='wpWatchthis'".
 845                                 ($this->watchthis?" checked='checked'":"").
 846                                 " accesskey=\"".htmlspecialchars(wfMsg('accesskey-watch'))."\" id='wpWatchthis'  />".
 847                                 "<label for='wpWatchthis' title=\"" .
 848                                         htmlspecialchars(wfMsg('tooltip-watch'))."\">{$watchthis}</label>";
 849                 }
 850
 851                 $checkboxhtml = $minoredithtml . $watchhtml;
 852
 853                 if ( $wgUser->getOption( 'previewontop' ) ) {
 854
 855                         if ( 'preview' == $this->formtype ) {
 856                                 $this->showPreview();
 857                         } else {
 858                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
 859                         }
 860
 861                         if ( 'diff' == $this->formtype ) {
 862                                 $wgOut->addHTML( $this->getDiff() );
 863                         }
 864                 }
 865
 866
 867                 # if this is a comment, show a subject line at the top, which is also the edit summary.
 868                 # Otherwise, show a summary field at the bottom
 869                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
 870                 if( $this->section == 'new' ) {
 871                         $commentsubject="<span id='wpSummaryLabel'><label for='wpSummary'>{$subject}:</label></span> <div class='editOptions'><input tabindex='1' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
 872                         $editsummary = '';
 873                 } else {
 874                         $commentsubject = '';
 875                         $editsummary="<span id='wpSummaryLabel'><label for='wpSummary'>{$summary}:</label></span> <div class='editOptions'><input tabindex='2' type='text' value=\"$summarytext\" name='wpSummary' id='wpSummary' maxlength='200' size='60' /><br />";
 876                 }
 877
 878                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
 879                 if( !$this->preview && !$this->diff ) {
 880                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
 881                 }
 882                 $templates = $this->formatTemplates();
 883
 884                 global $wgUseMetadataEdit ;
 885                 if ( $wgUseMetadataEdit ) {
 886                         $metadata = $this->mMetaData ;
 887                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
 888                         $helppage = Title::newFromText( wfMsg( "metadata_page" ) ) ;
 889                         $top = wfMsg( 'metadata', $helppage->getLocalURL() );
 890                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
 891                 }
 892                 else $metadata = "" ;
 893
 894                 $hidden = '';
 895                 $recreate = '';
 896                 if ($this->deletedSinceEdit) {
 897                         if ( 'save' != $this->formtype ) {
 898                                 $wgOut->addWikiText( wfMsg('deletedwhileediting'));
 899                         } else {
 900                                 // Hide the toolbar and edit area, use can click preview to get it back
 901                                 // Add an confirmation checkbox and explanation.
 902                                 $toolbar = '';
 903                                 $hidden = 'type="hidden" style="display:none;"';
 904                                 $recreate = $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ));
 905                                 $recreate .=
 906                                         "<br /><input tabindex='1' type='checkbox' value='1' name='wpRecreate' id='wpRecreate' />".
 907                                         "<label for='wpRecreate' title='".wfMsg('tooltip-recreate')."'>". wfMsg('recreate')."</label>";
 908                         }
 909                 }
 910
 911                 $temp = array(
 912                         'id'        => 'wpSave',
 913                         'name'      => 'wpSave',
 914                         'type'      => 'submit',
 915                         'tabindex'  => '5',
 916                         'value'     => wfMsg('savearticle'),
 917                         'accesskey' => wfMsg('accesskey-save'),
 918                         'title'     => wfMsg('tooltip-save'),
 919                 );
 920                 $buttons['save'] = wfElement('input', $temp, '');
 921                 $temp = array(
 922                         'id'        => 'wpDiff',
 923                         'name'      => 'wpDiff',
 924                         'type'      => 'submit',
 925                         'tabindex'  => '7',
 926                         'value'     => wfMsg('showdiff'),
 927                         'accesskey' => wfMsg('accesskey-diff'),
 928                         'title'     => wfMsg('tooltip-diff'),
 929                 );
 930                 $buttons['diff'] = wfElement('input', $temp, '');
 931
 932                 global $wgLivePreview;
 933                 if ( $wgLivePreview ) {
 934                         $temp = array(
 935                                 'id'        => 'wpPreview',
 936                                 'name'      => 'wpPreview',
 937                                 'type'      => 'submit',
 938                                 'tabindex'  => '6',
 939                                 'value'     => wfMsg('showpreview'),
 940                                 'accesskey' => '',
 941                                 'title'     => wfMsg('tooltip-preview'),
 942                                 'style'     => 'display: none;',
 943                         );
 944                         $buttons['preview'] = wfElement('input', $temp, '');
 945                         $temp = array(
 946                                 'id'        => 'wpLivePreview',
 947                                 'name'      => 'wpLivePreview',
 948                                 'type'      => 'submit',
 949                                 'tabindex'  => '6',
 950                                 'value'     => wfMsg('showlivepreview'),
 951                                 'accesskey' => wfMsg('accesskey-preview'),
 952                                 'title'     => '',
 953                                 'onclick'   => $this->doLivePreviewScript(),
 954                         );
 955                         $buttons['live'] = wfElement('input', $temp, '');
 956                 } else {
 957                         $temp = array(
 958                                 'id'        => 'wpPreview',
 959                                 'name'      => 'wpPreview',
 960                                 'type'      => 'submit',
 961                                 'tabindex'  => '6',
 962                                 'value'     => wfMsg('showpreview'),
 963                                 'accesskey' => wfMsg('accesskey-preview'),
 964                                 'title'     => wfMsg('tooltip-preview'),
 965                         );
 966                         $buttons['preview'] = wfElement('input', $temp, '');
 967                         $buttons['live'] = '';
 968                 }
 969
 970                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
 971                         ? ""
 972                         : "<input type='hidden' name=\"safemode\" value='1' />\n";
 973
 974                 $wgOut->addHTML( <<<END
 975 {$toolbar}
 976 <form id="editform" name="editform" method="post" action="$action"
 977 enctype="multipart/form-data">
 978 END
 979 );
 980
 981                 if( is_callable( $formCallback ) ) {
 982                         call_user_func_array( $formCallback, array( &$wgOut ) );
 983                 }
 984
 985                 // Put these up at the top to ensure they aren't lost on early form submission
 986                 $wgOut->addHTML( "
 987 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
 988 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
 989 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
 990 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
 991
 992                 $wgOut->addHTML( <<<END
 993 $recreate
 994 {$commentsubject}
 995 <textarea tabindex='1' accesskey="," name="wpTextbox1" id="wpTextbox1" rows='{$rows}'
 996 cols='{$cols}'{$ew} $hidden>
 997 END
 998 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox1 ) ) .
 999 "
1000 </textarea>
1001                 " );
1002
1003                 $wgOut->addWikiText( $copywarn );
1004                 $wgOut->addHTML( "
1005 {$metadata}
1006 {$editsummary}
1007 {$checkboxhtml}
1008 {$safemodehtml}
1009 ");
1010
1011                 $wgOut->addHTML("
1012 <div class='editButtons'>
1013         {$buttons['save']}
1014         {$buttons['preview']}
1015         {$buttons['live']}
1016         {$buttons['diff']}
1017         <span class='editHelp'>{$cancel} | {$edithelp}</span>
1018 </div><!-- editButtons -->
1019 </div><!-- editOptions -->");
1020
1021                 $wgOut->addWikiText( wfMsgForContent( 'edittools' ) );
1022
1023                 $wgOut->addHTML( "
1024 <div class='templatesUsed'>
1025 {$templates}
1026 </div>
1027 " );
1028
1029                 if ( $wgUser->isLoggedIn() ) {
1030                         /**
1031                          * To make it harder for someone to slip a user a page
1032                          * which submits an edit form to the wiki without their
1033                          * knowledge, a random token is associated with the login
1034                          * session. If it's not passed back with the submission,
1035                          * we won't save the page, or render user JavaScript and
1036                          * CSS previews.
1037                          */
1038                         $token = htmlspecialchars( $wgUser->editToken() );
1039                         $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
1040                 }
1041
1042
1043                 if ( $this->isConflict ) {
1044                         require_once( "DifferenceEngine.php" );
1045                         $wgOut->addWikiText( '==' . wfMsg( "yourdiff" ) . '==' );
1046
1047                         $de = new DifferenceEngine( $this->mTitle );
1048                         $de->setText( $this->textbox2, $this->textbox1 );
1049                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1050
1051                         $wgOut->addWikiText( '==' . wfMsg( "yourtext" ) . '==' );
1052                         $wgOut->addHTML( "<textarea tabindex=6 id='wpTextbox2' name=\"wpTextbox2\" rows='{$rows}' cols='{$cols}' wrap='virtual'>"
1053                                 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox2 ) ) . "\n</textarea>" );
1054                 }
1055                 $wgOut->addHTML( "</form>\n" );
1056                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1057
1058                         if ( $this->formtype == 'preview') {
1059                                 $this->showPreview();
1060                         } else {
1061                                 $wgOut->addHTML( '<div id="wikiPreview"></div>' );
1062                         }
1063
1064                         if ( $this->formtype == 'diff') {
1065                                 $wgOut->addHTML( $this->getDiff() );
1066                         }
1067
1068                 }
1069
1070                 wfProfileOut( $fname );
1071         }
1072
1073         /**
1074          * Append preview output to $wgOut.
1075          * Includes category rendering if this is a category page.
1076          * @access private
1077          */
1078         function showPreview() {
1079                 global $wgOut;
1080                 $wgOut->addHTML( '<div id="wikiPreview">' );
1081                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1082                         $this->mArticle->openShowCategory();
1083                 }
1084                 $previewOutput = $this->getPreviewText();
1085                 $wgOut->addHTML( $previewOutput );
1086                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
1087                         $this->mArticle->closeShowCategory();
1088                 }
1089                 $wgOut->addHTML( "<br style=\"clear:both;\" />\n" );
1090                 $wgOut->addHTML( '</div>' );
1091         }
1092
1093         /**
1094          * Prepare a list of templates used by this page. Returns HTML.
1095          */
1096         function formatTemplates() {
1097                 global $wgUser;
1098
1099                 $fname = 'EditPage::formatTemplates';
1100                 wfProfileIn( $fname );
1101
1102                 $sk =& $wgUser->getSkin();
1103
1104                 $outText = '';
1105                 $templates = $this->mArticle->getUsedTemplates();
1106                 if ( count( $templates ) > 0 ) {
1107                         # Do a batch existence check
1108                         $batch = new LinkBatch;
1109                         foreach( $templates as $title ) {
1110                                 $batch->addObj( $title );
1111                         }
1112                         $batch->execute();
1113
1114                         # Construct the HTML
1115                         $outText = '<br />'. wfMsg( 'templatesused' ) . '<ul>';
1116                         foreach ( $templates as $titleObj ) {
1117                                 $outText .= '<li>' . $sk->makeLinkObj( $titleObj ) . '</li>';
1118                         }
1119                         $outText .= '</ul>';
1120                 }
1121                 wfProfileOut( $fname );
1122                 return $outText;
1123         }
1124
1125         /**
1126          * Live Preview lets us fetch rendered preview page content and
1127          * add it to the page without refreshing the whole page.
1128          * If not supported by the browser it will fall through to the normal form
1129          * submission method.
1130          *
1131          * This function outputs a script tag to support live preview, and
1132          * returns an onclick handler which should be added to the attributes
1133          * of the preview button
1134          */
1135         function doLivePreviewScript() {
1136                 global $wgStylePath, $wgJsMimeType, $wgOut, $wgTitle;
1137                 $wgOut->addHTML( '<script type="'.$wgJsMimeType.'" src="' .
1138                         htmlspecialchars( $wgStylePath . '/common/preview.js' ) .
1139                         '"></script>' . "\n" );
1140                 $liveAction = $wgTitle->getLocalUrl( 'action=submit&wpPreview=true&live=true' );
1141                 return "return !livePreview(" .
1142                         "getElementById('wikiPreview')," .
1143                         "editform.wpTextbox1.value," .
1144                         '"' . $liveAction . '"' . ")";
1145         }
1146
1147         function getLastDelete() {
1148                 $dbr =& wfGetDB( DB_SLAVE );
1149                 $fname = 'EditPage::getLastDelete';
1150                 $res = $dbr->select(
1151                         array( 'logging', 'user' ),
1152                         array( 'log_type',
1153                                'log_action',
1154                                'log_timestamp',
1155                                'log_user',
1156                                'log_namespace',
1157                                'log_title',
1158                                'log_comment',
1159                                'log_params',
1160                                'user_name', ),
1161                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1162                                'log_title' => $this->mTitle->getDBkey(),
1163                                'log_type' => 'delete',
1164                                'log_action' => 'delete',
1165                                'user_id=log_user' ),
1166                         $fname,
1167                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
1168
1169                 if($dbr->numRows($res) == 1) {
1170                         while ( $x = $dbr->fetchObject ( $res ) )
1171                                 $data = $x;
1172                         $dbr->freeResult ( $res ) ;
1173                 } else {
1174                         $data = null;
1175                 }
1176                 return $data;
1177         }
1178
1179         /**
1180          * @todo document
1181          */
1182         function getPreviewText() {
1183                 global $wgOut, $wgUser, $wgTitle, $wgParser;
1184
1185                 $fname = 'EditPage::getPreviewText';
1186                 wfProfileIn( $fname );
1187
1188                 if ( $this->mTokenOk ) {
1189                         $msg = 'previewnote';
1190                 } else {
1191                         $msg = 'session_fail_preview';
1192                 }
1193                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
1194                         "<div class='previewnote'>" . $wgOut->parse( wfMsg( $msg ) ) . "</div>\n";
1195                 if ( $this->isConflict ) {
1196                         $previewhead.='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1197                 }
1198
1199                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1200                 $parserOptions->setEditSection( false );
1201
1202                 # don't parse user css/js, show message about preview
1203                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1204
1205                 if ( $this->isCssJsSubpage ) {
1206                         if(preg_match("/\\.css$/", $wgTitle->getText() ) ) {
1207                                 $previewtext = wfMsg('usercsspreview');
1208                         } else if(preg_match("/\\.js$/", $wgTitle->getText() ) ) {
1209                                 $previewtext = wfMsg('userjspreview');
1210                         }
1211                         $parserOptions->setTidy(true);
1212                         $parserOutput = $wgParser->parse( $previewtext , $wgTitle, $parserOptions );
1213                         $wgOut->addHTML( $parserOutput->mText );
1214                         wfProfileOut( $fname );
1215                         return $previewhead;
1216                 } else {
1217                         # if user want to see preview when he edit an article
1218                         if( $wgUser->getOption('previewonfirst') and ($this->textbox1 == '')) {
1219                                 $this->textbox1 = $this->mArticle->getContent();
1220                         }
1221
1222                         $toparse = $this->textbox1;
1223
1224                         # If we're adding a comment, we need to show the
1225                         # summary as the headline
1226                         if($this->section=="new" && $this->summary!="") {
1227                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1228                         }
1229
1230                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData ;
1231                         $parserOptions->setTidy(true);
1232                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ) ."\n\n",
1233                                         $wgTitle, $parserOptions );
1234
1235                         $previewHTML = $parserOutput->getText();
1236                         $wgOut->addParserOutputNoText( $parserOutput );
1237
1238                         wfProfileOut( $fname );
1239                         return $previewhead . $previewHTML;
1240                 }
1241         }
1242
1243         /**
1244          * @todo document
1245          */
1246         function blockedIPpage() {
1247                 global $wgOut;
1248                 $wgOut->blockedPage();
1249         }
1250
1251         /**
1252          * @todo document
1253          */
1254         function userNotLoggedInPage() {
1255                 global $wgOut;
1256
1257                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1258                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1259                 $wgOut->setArticleRelated( false );
1260
1261                 $wgOut->addWikiText( wfMsg( 'whitelistedittext' ) );
1262                 $wgOut->returnToMain( false );
1263         }
1264
1265         /**
1266          * Creates a basic error page which informs the user that
1267          * they have to validate their email address before being
1268          * allowed to edit.
1269          */
1270         function userNotConfirmedPage() {
1271
1272                 global $wgOut;
1273
1274                 $wgOut->setPageTitle( wfMsg( 'confirmedittitle' ) );
1275                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1276                 $wgOut->setArticleRelated( false );
1277                 $wgOut->addWikiText( wfMsg( 'confirmedittext' ) );
1278                 $wgOut->returnToMain( false );
1279         }
1280
1281         /**
1282          * @todo document
1283          */
1284         function spamPage ( $match = false )
1285         {
1286                 global $wgOut;
1287                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1288                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1289                 $wgOut->setArticleRelated( false );
1290
1291                 $wgOut->addWikiText( wfMsg( 'spamprotectiontext' ) );
1292                 if ( $match ) {
1293                         $wgOut->addWikiText( wfMsg( 'spamprotectionmatch', "<nowiki>{$match}</nowiki>" ) );
1294                 }
1295                 $wgOut->returnToMain( false );
1296         }
1297
1298         /**
1299          * @access private
1300          * @todo document
1301          */
1302         function mergeChangesInto( &$editText ){
1303                 $fname = 'EditPage::mergeChangesInto';
1304                 wfProfileIn( $fname );
1305
1306                 $db =& wfGetDB( DB_MASTER );
1307
1308                 // This is the revision the editor started from
1309                 $baseRevision = Revision::loadFromTimestamp(
1310                         $db, $this->mArticle->mTitle, $this->edittime );
1311                 if( is_null( $baseRevision ) ) {
1312                         wfProfileOut( $fname );
1313                         return false;
1314                 }
1315                 $baseText = $baseRevision->getText();
1316
1317                 // The current state, we want to merge updates into it
1318                 $currentRevision =  Revision::loadFromTitle(
1319                         $db, $this->mArticle->mTitle );
1320                 if( is_null( $currentRevision ) ) {
1321                         wfProfileOut( $fname );
1322                         return false;
1323                 }
1324                 $currentText = $currentRevision->getText();
1325
1326                 if( wfMerge( $baseText, $editText, $currentText, $result ) ){
1327                         $editText = $result;
1328                         wfProfileOut( $fname );
1329                         return true;
1330                 } else {
1331                         wfProfileOut( $fname );
1332                         return false;
1333                 }
1334         }
1335
1336         /**
1337          * Check if the browser is on a blacklist of user-agents known to
1338          * mangle UTF-8 data on form submission. Returns true if Unicode
1339          * should make it through, false if it's known to be a problem.
1340          * @return bool
1341          * @access private
1342          */
1343         function checkUnicodeCompliantBrowser() {
1344                 global $wgBrowserBlackList;
1345                 if( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
1346                         // No User-Agent header sent? Trust it by default...
1347                         return true;
1348                 }
1349                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1350                 foreach ( $wgBrowserBlackList as $browser ) {
1351                         if ( preg_match($browser, $currentbrowser) ) {
1352                                 return false;
1353                         }
1354                 }
1355                 return true;
1356         }
1357
1358         /**
1359          * Format an anchor fragment as it would appear for a given section name
1360          * @param string $text
1361          * @return string
1362          * @access private
1363          */
1364         function sectionAnchor( $text ) {
1365                 $headline = Sanitizer::decodeCharReferences( $text );
1366                 # strip out HTML
1367                 $headline = preg_replace( '/<.*?' . '>/', '', $headline );
1368                 $headline = trim( $headline );
1369                 $sectionanchor = '#' . urlencode( str_replace( ' ', '_', $headline ) );
1370                 $replacearray = array(
1371                         '%3A' => ':',
1372                         '%' => '.'
1373                 );
1374                 return str_replace(
1375                         array_keys( $replacearray ),
1376                         array_values( $replacearray ),
1377                         $sectionanchor );
1378         }
1379
1380         /**
1381          * Shows a bulletin board style toolbar for common editing functions.
1382          * It can be disabled in the user preferences.
1383          * The necessary JavaScript code can be found in style/wikibits.js.
1384          */
1385         function getEditToolbar() {
1386                 global $wgStylePath, $wgContLang, $wgJsMimeType;
1387
1388                 /**
1389                  * toolarray an array of arrays which each include the filename of
1390                  * the button image (without path), the opening tag, the closing tag,
1391                  * and optionally a sample text that is inserted between the two when no
1392                  * selection is highlighted.
1393                  * The tip text is shown when the user moves the mouse over the button.
1394                  *
1395                  * Already here are accesskeys (key), which are not used yet until someone
1396                  * can figure out a way to make them work in IE. However, we should make
1397                  * sure these keys are not defined on the edit page.
1398                  */
1399                 $toolarray=array(
1400                         array(  'image'=>'button_bold.png',
1401                                         'open'  =>      "\'\'\'",
1402                                         'close' =>      "\'\'\'",
1403                                         'sample'=>      wfMsg('bold_sample'),
1404                                         'tip'   =>      wfMsg('bold_tip'),
1405                                         'key'   =>      'B'
1406                                 ),
1407                         array(  'image'=>'button_italic.png',
1408                                         'open'  =>      "\'\'",
1409                                         'close' =>      "\'\'",
1410                                         'sample'=>      wfMsg('italic_sample'),
1411                                         'tip'   =>      wfMsg('italic_tip'),
1412                                         'key'   =>      'I'
1413                                 ),
1414                         array(  'image'=>'button_link.png',
1415                                         'open'  =>      '[[',
1416                                         'close' =>      ']]',
1417                                         'sample'=>      wfMsg('link_sample'),
1418                                         'tip'   =>      wfMsg('link_tip'),
1419                                         'key'   =>      'L'
1420                                 ),
1421                         array(  'image'=>'button_extlink.png',
1422                                         'open'  =>      '[',
1423                                         'close' =>      ']',
1424                                         'sample'=>      wfMsg('extlink_sample'),
1425                                         'tip'   =>      wfMsg('extlink_tip'),
1426                                         'key'   =>      'X'
1427                                 ),
1428                         array(  'image'=>'button_headline.png',
1429                                         'open'  =>      "\\n== ",
1430                                         'close' =>      " ==\\n",
1431                                         'sample'=>      wfMsg('headline_sample'),
1432                                         'tip'   =>      wfMsg('headline_tip'),
1433                                         'key'   =>      'H'
1434                                 ),
1435                         array(  'image'=>'button_image.png',
1436                                         'open'  =>      '[['.$wgContLang->getNsText(NS_IMAGE).":",
1437                                         'close' =>      ']]',
1438                                         'sample'=>      wfMsg('image_sample'),
1439                                         'tip'   =>      wfMsg('image_tip'),
1440                                         'key'   =>      'D'
1441                                 ),
1442                         array(  'image' =>'button_media.png',
1443                                         'open'  =>      '[['.$wgContLang->getNsText(NS_MEDIA).':',
1444                                         'close' =>      ']]',
1445                                         'sample'=>      wfMsg('media_sample'),
1446                                         'tip'   =>      wfMsg('media_tip'),
1447                                         'key'   =>      'M'
1448                                 ),
1449                         array(  'image' =>'button_math.png',
1450                                         'open'  =>      "\\<math\\>",
1451                                         'close' =>      "\\</math\\>",
1452                                         'sample'=>      wfMsg('math_sample'),
1453                                         'tip'   =>      wfMsg('math_tip'),
1454                                         'key'   =>      'C'
1455                                 ),
1456                         array(  'image' =>'button_nowiki.png',
1457                                         'open'  =>      "\\<nowiki\\>",
1458                                         'close' =>      "\\</nowiki\\>",
1459                                         'sample'=>      wfMsg('nowiki_sample'),
1460                                         'tip'   =>      wfMsg('nowiki_tip'),
1461                                         'key'   =>      'N'
1462                                 ),
1463                         array(  'image' =>'button_sig.png',
1464                                         'open'  =>      '--~~~~',
1465                                         'close' =>      '',
1466                                         'sample'=>      '',
1467                                         'tip'   =>      wfMsg('sig_tip'),
1468                                         'key'   =>      'Y'
1469                                 ),
1470                         array(  'image' =>'button_hr.png',
1471                                         'open'  =>      "\\n----\\n",
1472                                         'close' =>      '',
1473                                         'sample'=>      '',
1474                                         'tip'   =>      wfMsg('hr_tip'),
1475                                         'key'   =>      'R'
1476                                 )
1477                 );
1478                 $toolbar ="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
1479
1480                 $toolbar.="document.writeln(\"<div id='toolbar'>\");\n";
1481                 foreach($toolarray as $tool) {
1482
1483                         $image=$wgStylePath.'/common/images/'.$tool['image'];
1484                         $open=$tool['open'];
1485                         $close=$tool['close'];
1486                         $sample = wfEscapeJsString( $tool['sample'] );
1487
1488                         // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
1489                         // Older browsers show a "speedtip" type message only for ALT.
1490                         // Ideally these should be different, realistically they
1491                         // probably don't need to be.
1492                         $tip = wfEscapeJsString( $tool['tip'] );
1493
1494                         #$key = $tool["key"];
1495
1496                         $toolbar.="addButton('$image','$tip','$open','$close','$sample');\n";
1497                 }
1498
1499                 $toolbar.="document.writeln(\"</div>\");\n";
1500                 $toolbar.="/*]]>*/\n</script>";
1501                 return $toolbar;
1502         }
1503
1504         /**
1505          * Output preview text only. This can be sucked into the edit page
1506          * via JavaScript, and saves the server time rendering the skin as
1507          * well as theoretically being more robust on the client (doesn't
1508          * disturb the edit box's undo history, won't eat your text on
1509          * failure, etc).
1510          *
1511          * @todo This doesn't include category or interlanguage links.
1512          *       Would need to enhance it a bit, maybe wrap them in XML
1513          *       or something... that might also require more skin
1514          *       initialization, so check whether that's a problem.
1515          */
1516         function livePreview() {
1517                 global $wgOut;
1518                 $wgOut->disable();
1519                 header( 'Content-type: text/xml' );
1520                 header( 'Cache-control: no-cache' );
1521                 # FIXME
1522                 echo $this->getPreviewText( );
1523                 /* To not shake screen up and down between preview and live-preview */
1524                 echo "<br style=\"clear:both;\" />\n";
1525         }
1526
1527
1528         /**
1529          * Get a diff between the current contents of the edit box and the
1530          * version of the page we're editing from.
1531          *
1532          * If this is a section edit, we'll replace the section as for final
1533          * save and then make a comparison.
1534          *
1535          * @return string HTML
1536          */
1537         function getDiff() {
1538                 global $wgUser;
1539
1540                 require_once( 'DifferenceEngine.php' );
1541                 $oldtext = $this->mArticle->fetchContent();
1542                 $newtext = $this->mArticle->replaceSection(
1543                         $this->section, $this->textbox1, $this->summary, $this->edittime );
1544                 $oldtitle = wfMsg( 'currentrev' );
1545                 $newtitle = wfMsg( 'yourtext' );
1546                 if ( $oldtext !== false  || $newtext != '' ) {
1547                         $de = new DifferenceEngine( $this->mTitle );
1548                         $de->setText( $oldtext, $newtext );
1549                         $difftext = $de->getDiff( $oldtitle, $newtitle );
1550                 } else {
1551                         $difftext = '';
1552                 }
1553
1554                 return '<div id="wikiDiff">' . $difftext . '</div>';
1555         }
1556
1557         /**
1558          * Filter an input field through a Unicode de-armoring process if it
1559          * came from an old browser with known broken Unicode editing issues.
1560          *
1561          * @param WebRequest $request
1562          * @param string $field
1563          * @return string
1564          * @access private
1565          */
1566         function safeUnicodeInput( $request, $field ) {
1567                 $text = rtrim( $request->getText( $field ) );
1568                 return $request->getBool( 'safemode' )
1569                         ? $this->unmakesafe( $text )
1570                         : $text;
1571         }
1572
1573         /**
1574          * Filter an output field through a Unicode armoring process if it is
1575          * going to an old browser with known broken Unicode editing issues.
1576          *
1577          * @param string $text
1578          * @return string
1579          * @access private
1580          */
1581         function safeUnicodeOutput( $text ) {
1582                 global $wgContLang;
1583                 $codedText = $wgContLang->recodeForEdit( $text );
1584                 return $this->checkUnicodeCompliantBrowser()
1585                         ? $codedText
1586                         : $this->makesafe( $codedText );
1587         }
1588
1589         /**
1590          * A number of web browsers are known to corrupt non-ASCII characters
1591          * in a UTF-8 text editing environment. To protect against this,
1592          * detected browsers will be served an armored version of the text,
1593          * with non-ASCII chars converted to numeric HTML character references.
1594          *
1595          * Preexisting such character references will have a 0 added to them
1596          * to ensure that round-trips do not alter the original data.
1597          *
1598          * @param string $invalue
1599          * @return string
1600          * @access private
1601          */
1602         function makesafe( $invalue ) {
1603                 // Armor existing references for reversability.
1604                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
1605
1606                 $bytesleft = 0;
1607                 $result = "";
1608                 $working = 0;
1609                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1610                         $bytevalue = ord( $invalue{$i} );
1611                         if( $bytevalue <= 0x7F ) { //0xxx xxxx
1612                                 $result .= chr( $bytevalue );
1613                                 $bytesleft = 0;
1614                         } elseif( $bytevalue <= 0xBF ) { //10xx xxxx
1615                                 $working = $working << 6;
1616                                 $working += ($bytevalue & 0x3F);
1617                                 $bytesleft--;
1618                                 if( $bytesleft <= 0 ) {
1619                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
1620                                 }
1621                         } elseif( $bytevalue <= 0xDF ) { //110x xxxx
1622                                 $working = $bytevalue & 0x1F;
1623                                 $bytesleft = 1;
1624                         } elseif( $bytevalue <= 0xEF ) { //1110 xxxx
1625                                 $working = $bytevalue & 0x0F;
1626                                 $bytesleft = 2;
1627                         } else { //1111 0xxx
1628                                 $working = $bytevalue & 0x07;
1629                                 $bytesleft = 3;
1630                         }
1631                 }
1632                 return $result;
1633         }
1634
1635         /**
1636          * Reverse the previously applied transliteration of non-ASCII characters
1637          * back to UTF-8. Used to protect data from corruption by broken web browsers
1638          * as listed in $wgBrowserBlackList.
1639          *
1640          * @param string $invalue
1641          * @return string
1642          * @access private
1643          */
1644         function unmakesafe( $invalue ) {
1645                 $result = "";
1646                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1647                         if( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
1648                                 $i += 3;
1649                                 $hexstring = "";
1650                                 do {
1651                                         $hexstring .= $invalue{$i};
1652                                         $i++;
1653                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
1654
1655                                 // Do some sanity checks. These aren't needed for reversability,
1656                                 // but should help keep the breakage down if the editor
1657                                 // breaks one of the entities whilst editing.
1658                                 if ((substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6)) {
1659                                         $codepoint = hexdec($hexstring);
1660                                         $result .= codepointToUtf8( $codepoint );
1661                                 } else {
1662                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
1663                                 }
1664                         } else {
1665                                 $result .= substr( $invalue, $i, 1 );
1666                         }
1667                 }
1668                 // reverse the transform that we made for reversability reasons.
1669                 return strtr( $result, array( "&#x0" => "&#x" ) );
1670         }
1671
1672         function noCreatePermission() {
1673                 global $wgOut;
1674                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
1675                 $wgOut->addWikiText( wfMsg( 'nocreatetext' ) );
1676         }
1677
1678 }
1679
1680 ?>