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