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
  21         # Form values
  22         var $save = false, $preview = false, $diff = false;
  23         var $minoredit = false, $watchthis = false, $recreate = false;
  24         var $textbox1 = '', $textbox2 = '', $summary = '';
  25         var $edittime = '', $section = '', $starttime = '';
  26         var $oldid = 0;
  27
  28         /**
  29          * @todo document
  30          * @param $article
  31          */
  32         function EditPage( $article ) {
  33                 $this->mArticle =& $article;
  34                 global $wgTitle;
  35                 $this->mTitle =& $wgTitle;
  36         }
  37
  38         /**
  39          * This is the function that extracts metadata from the article body on the first view.
  40          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
  41          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
  42          */
  43         function extractMetaDataFromArticle () {
  44                 global $wgUseMetadataEdit , $wgMetadataWhitelist , $wgLang ;
  45                 $this->mMetaData = '' ;
  46                 if ( !$wgUseMetadataEdit ) return ;
  47                 if ( $wgMetadataWhitelist == '' ) return ;
  48                 $s = '' ;
  49                 $t = $this->mArticle->getContent ( true ) ;
  50
  51                 # MISSING : <nowiki> filtering
  52
  53                 # Categories and language links
  54                 $t = explode ( "\n" , $t ) ;
  55                 $catlow = strtolower ( $wgLang->getNsText ( NS_CATEGORY ) ) ;
  56                 $cat = $ll = array() ;
  57                 foreach ( $t AS $key => $x )
  58                 {
  59                         $y = trim ( strtolower ( $x ) ) ;
  60                         while ( substr ( $y , 0 , 2 ) == '[[' )
  61                         {
  62                                 $y = explode ( ']]' , trim ( $x ) ) ;
  63                                 $first = array_shift ( $y ) ;
  64                                 $first = explode ( ':' , $first ) ;
  65                                 $ns = array_shift ( $first ) ;
  66                                 $ns = trim ( str_replace ( '[' , '' , $ns ) ) ;
  67                                 if ( strlen ( $ns ) == 2 OR strtolower ( $ns ) == $catlow )
  68                                 {
  69                                         $add = '[[' . $ns . ':' . implode ( ':' , $first ) . ']]' ;
  70                                         if ( strtolower ( $ns ) == $catlow ) $cat[] = $add ;
  71                                         else $ll[] = $add ;
  72                                         $x = implode ( ']]' , $y ) ;
  73                                         $t[$key] = $x ;
  74                                         $y = trim ( strtolower ( $x ) ) ;
  75                                 }
  76                         }
  77                 }
  78                 if ( count ( $cat ) ) $s .= implode ( ' ' , $cat ) . "\n" ;
  79                 if ( count ( $ll ) ) $s .= implode ( ' ' , $ll ) . "\n" ;
  80                 $t = implode ( "\n" , $t ) ;
  81
  82                 # Load whitelist
  83                 $sat = array () ; # stand-alone-templates; must be lowercase
  84                 $wl_title = Title::newFromText ( $wgMetadataWhitelist ) ;
  85                 $wl_article = new Article ( $wl_title ) ;
  86                 $wl = explode ( "\n" , $wl_article->getContent(true) ) ;
  87                 foreach ( $wl AS $x )
  88                 {
  89                         $isentry = false ;
  90                         $x = trim ( $x ) ;
  91                         while ( substr ( $x , 0 , 1 ) == '*' )
  92                         {
  93                                 $isentry = true ;
  94                                 $x = trim ( substr ( $x , 1 ) ) ;
  95                         }
  96                         if ( $isentry )
  97                         {
  98                                 $sat[] = strtolower ( $x ) ;
  99                         }
 100
 101                 }
 102
 103                 # Templates, but only some
 104                 $t = explode ( '{{' , $t ) ;
 105                 $tl = array () ;
 106                 foreach ( $t AS $key => $x )
 107                 {
 108                         $y = explode ( '}}' , $x , 2 ) ;
 109                         if ( count ( $y ) == 2 )
 110                         {
 111                                 $z = $y[0] ;
 112                                 $z = explode ( '|' , $z ) ;
 113                                 $tn = array_shift ( $z ) ;
 114                                 if ( in_array ( strtolower ( $tn ) , $sat ) )
 115                                 {
 116                                         $tl[] = '{{' . $y[0] . '}}' ;
 117                                         $t[$key] = $y[1] ;
 118                                         $y = explode ( '}}' , $y[1] , 2 ) ;
 119                                 }
 120                                 else $t[$key] = '{{' . $x ;
 121                         }
 122                         else if ( $key != 0 ) $t[$key] = '{{' . $x ;
 123                         else $t[$key] = $x ;
 124                 }
 125                 if ( count ( $tl ) ) $s .= implode ( ' ' , $tl ) ;
 126                 $t = implode ( '' , $t ) ;
 127
 128                 $t = str_replace ( "\n\n\n" , "\n" , $t ) ;
 129                 $this->mArticle->mContent = $t ;
 130                 $this->mMetaData = $s ;
 131         }
 132
 133         /**
 134          * This is the function that gets called for "action=edit".
 135          */
 136         function edit() {
 137                 global $wgOut, $wgUser, $wgRequest;
 138                 // this is not an article
 139                 $wgOut->setArticleFlag(false);
 140
 141                 $this->importFormData( $wgRequest );
 142
 143                 if( $this->live ) {
 144                         $this->livePreview();
 145                         return;
 146                 }
 147
 148                 if ( ! $this->mTitle->userCanEdit() ) {
 149                         $wgOut->readOnlyPage( $this->mArticle->getContent( true ), true );
 150                         return;
 151                 }
 152                 if ( !$this->preview && !$this->diff && $wgUser->isBlockedFrom( $this->mTitle, !$this->save ) ) {
 153                         # When previewing, don't check blocked state - will get caught at save time.
 154                         # Also, check when starting edition is done against slave to improve performance.
 155                         $this->blockedIPpage();
 156                         return;
 157                 }
 158                 if ( !$wgUser->isAllowed('edit') ) {
 159                         if ( $wgUser->isAnon() ) {
 160                                 $this->userNotLoggedInPage();
 161                                 return;
 162                         } else {
 163                                 $wgOut->readOnlyPage( $this->mArticle->getContent( true ), true );
 164                                 return;
 165                         }
 166                 }
 167                 if ( wfReadOnly() ) {
 168                         if( $this->save || $this->preview ) {
 169                                 $this->editForm( 'preview' );
 170                         } else if ( $this->diff ) {
 171                                 $this->editForm( 'diff' );
 172                         } else {
 173                                 $wgOut->readOnlyPage( $this->mArticle->getContent( true ) );
 174                         }
 175                         return;
 176                 }
 177                 if ( $this->save ) {
 178                         $this->editForm( 'save' );
 179                 } else if ( $this->preview ) {
 180                         $this->editForm( 'preview' );
 181                 } else if ( $this->diff ) {
 182                         $this->editForm( 'diff' );
 183                 } else { # First time through
 184                         if( $this->previewOnOpen() ) {
 185                                 $this->editForm( 'preview', true );
 186                         } else {
 187                                 $this->extractMetaDataFromArticle () ;
 188                                 $this->editForm( 'initial', true );
 189                         }
 190                 }
 191         }
 192
 193         /**
 194          * Return true if this page should be previewed when the edit form
 195          * is initially opened.
 196          * @return bool
 197          * @access private
 198          */
 199         function previewOnOpen() {
 200                 global $wgUser;
 201                 return $wgUser->getOption( 'previewonfirst' ) ||
 202                         ( $this->mTitle->getNamespace() == NS_CATEGORY &&
 203                                 !$this->mTitle->exists() );
 204         }
 205
 206         /**
 207          * @todo document
 208          */
 209         function importFormData( &$request ) {
 210                 if( $request->wasPosted() ) {
 211                         # These fields need to be checked for encoding.
 212                         # Also remove trailing whitespace, but don't remove _initial_
 213                         # whitespace from the text boxes. This may be significant formatting.
 214                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 215                         $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
 216                         $this->mMetaData = rtrim( $request->getText( 'metadata'   ) );
 217                         $this->summary   =        $request->getText( 'wpSummary'  );
 218
 219                         $this->edittime = $request->getVal( 'wpEdittime' );
 220                         $this->starttime = $request->getVal( 'wpStarttime' );
 221                         if( is_null( $this->edittime ) ) {
 222                                 # If the form is incomplete, force to preview.
 223                                 $this->preview  = true;
 224                         } else {
 225                                 if( $this->tokenOk( $request ) ) {
 226                                         # Some browsers will not report any submit button
 227                                         # if the user hits enter in the comment box.
 228                                         # The unmarked state will be assumed to be a save,
 229                                         # if the form seems otherwise complete.
 230                                         $this->preview = $request->getCheck( 'wpPreview' );
 231                                         $this->diff = $request->getCheck( 'wpDiff' );
 232                                 } else {
 233                                         # Page might be a hack attempt posted from
 234                                         # an external site. Preview instead of saving.
 235                                         $this->preview = true;
 236                                 }
 237                         }
 238                         $this->save    = ! ( $this->preview OR $this->diff );
 239                         if( !preg_match( '/^\d{14}$/', $this->edittime )) {
 240                                 $this->edittime = null;
 241                         }
 242
 243                         if( !preg_match( '/^\d{14}$/', $this->starttime )) {
 244                                 $this->starttime = null;
 245                         }
 246
 247                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 248
 249                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 250                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 251                 } else {
 252                         # Not a posted form? Start with nothing.
 253                         $this->textbox1  = '';
 254                         $this->textbox2  = '';
 255                         $this->mMetaData = '';
 256                         $this->summary   = '';
 257                         $this->edittime  = '';
 258                         $this->starttime = wfTimestampNow();
 259                         $this->preview   = false;
 260                         $this->save      = false;
 261                         $this->diff      = false;
 262                         $this->minoredit = false;
 263                         $this->watchthis = false;
 264                         $this->recreate  = false;
 265                 }
 266
 267                 $this->oldid = $request->getInt( 'oldid' );
 268
 269                 # Section edit can come from either the form or a link
 270                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 271
 272                 $this->live = $request->getCheck( 'live' );
 273         }
 274
 275         /**
 276          * Make sure the form isn't faking a user's credentials.
 277          *
 278          * @param WebRequest $request
 279          * @return bool
 280          * @access private
 281          */
 282         function tokenOk( &$request ) {
 283                 global $wgUser;
 284                 if( $wgUser->isAnon() ) {
 285                         # Anonymous users may not have a session
 286                         # open. Don't tokenize.
 287                         return true;
 288                 } else {
 289                         return $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
 290                 }
 291         }
 292
 293         function submit() {
 294                 $this->edit();
 295         }
 296
 297         /**
 298          * The edit form is self-submitting, so that when things like
 299          * preview and edit conflicts occur, we get the same form back
 300          * with the extra stuff added.  Only when the final submission
 301          * is made and all is well do we actually save and redirect to
 302          * the newly-edited page.
 303          *
 304          * @param string $formtype Type of form either : save, initial, diff or preview
 305          * @param bool $firsttime True to load form data from db
 306          */
 307         function editForm( $formtype, $firsttime = false ) {
 308                 global $wgOut, $wgUser;
 309                 global $wgLang, $wgContLang, $wgParser, $wgTitle;
 310                 global $wgAllowAnonymousMinor, $wgRequest;
 311                 global $wgSpamRegex, $wgFilterCallback;
 312
 313                 $sk = $wgUser->getSkin();
 314                 $isConflict = false;
 315                 // css / js subpages of user pages get a special treatment
 316                 $isCssJsSubpage = $wgTitle->isCssJsSubpage();
 317
 318
 319                 /* Notice that we can't use isDeleted, because it returns true if article is ever deleted
 320                  * no matter it's current state
 321                  */
 322                 $deletetime = 0;
 323                 $confirmdelete = false;
 324                 if ( $this->edittime != '' ) {
 325                         /* Note that we rely on logging table, which hasn't been always there,
 326                          * but that doesn't matter, because this only applies to brand new
 327                          * deletes. This is done on every preview and save request. Move it further down
 328                          * to only perform it on saves
 329                          */
 330                         if ( $this->mTitle->isDeleted() ) {
 331                                 $query = $this->getLastDelete();
 332                                 if ( !is_null($query) ) {
 333                                         $deletetime = $query->log_timestamp;
 334                                         if ( ($deletetime - $this->starttime) > 0 ) {
 335                                                 $confirmdelete = true;
 336                                         }
 337                                 }
 338                         }
 339                 }
 340
 341
 342
 343                 if(!$this->mTitle->getArticleID() && ('initial' == $formtype || $firsttime )) { # new article
 344                         $editintro = $wgRequest->getText( 'editintro' );
 345                         $addstandardintro=true;
 346                         if($editintro) {
 347                                 $introtitle=Title::newFromText($editintro);
 348                                 if(isset($introtitle) && $introtitle->userCanRead()) {
 349                                         $rev=Revision::newFromTitle($introtitle);
 350                                         if($rev) {
 351                                                 $wgOut->addWikiText($rev->getText());
 352                                                 $addstandardintro=false;
 353                                         }
 354                                 }
 355                         }
 356                         if($addstandardintro) {
 357                                 $wgOut->addWikiText( wfMsg( 'newarticletext' ) );
 358                         }
 359                 }
 360
 361                 if( $this->mTitle->isTalkPage() ) {
 362                         $wgOut->addWikiText( wfMsg( 'talkpagetext' ) );
 363                 }
 364
 365                 # Attempt submission here.  This will check for edit conflicts,
 366                 # and redundantly check for locked database, blocked IPs, etc.
 367                 # that edit() already checked just in case someone tries to sneak
 368                 # in the back door with a hand-edited submission URL.
 369
 370                 if ( 'save' == $formtype ) {
 371                         # Reintegrate metadata
 372                         if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 373                         $this->mMetaData = '' ;
 374
 375                         # Check for spam
 376                         if ( $wgSpamRegex && preg_match( $wgSpamRegex, $this->textbox1, $matches ) ) {
 377                                 $this->spamPage ( $matches[0] );
 378                                 return;
 379                         }
 380                         if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section ) ) {
 381                                 # Error messages or other handling should be performed by the filter function
 382                                 return;
 383                         }
 384                         if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 385                                 # Check block state against master, thus 'false'.
 386                                 $this->blockedIPpage();
 387                                 return;
 388                         }
 389
 390                         if ( !$wgUser->isAllowed('edit') ) {
 391                                 if ( $wgUser->isAnon() ) {
 392                                 $this->userNotLoggedInPage();
 393                                 return;
 394                         }
 395                                 else {
 396                                         $wgOut->readOnlyPage();
 397                                         return;
 398                                 }
 399                         }
 400
 401                         if ( wfReadOnly() ) {
 402                                 $wgOut->readOnlyPage();
 403                                 return;
 404                         }
 405                         if ( $wgUser->pingLimiter() ) {
 406                                 $wgOut->rateLimited();
 407                                 return;
 408                         }
 409
 410                         # If the article has been deleted while editing, don't save it without
 411                         # confirmation
 412                         if ( !$confirmdelete || $this->recreate ) {
 413
 414
 415                         # If article is new, insert it.
 416                         $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 417                         if ( 0 == $aid ) {
 418                                 # Don't save a new article if it's blank.
 419                                 if ( ( '' == $this->textbox1 ) ||
 420                                   ( wfMsg( 'newarticletext' ) == $this->textbox1 ) ) {
 421                                         $wgOut->redirect( $this->mTitle->getFullURL() );
 422                                         return;
 423                                 }
 424                                 if (wfRunHooks('ArticleSave', array(&$this->mArticle, &$wgUser, &$this->textbox1,
 425                                                            &$this->summary, &$this->minoredit, &$this->watchthis, NULL)))
 426                                 {
 427
 428                                         $isComment=($this->section=='new');
 429                                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 430                                                                                                            $this->minoredit, $this->watchthis, false, $isComment);
 431                                         wfRunHooks('ArticleSaveComplete', array(&$this->mArticle, &$wgUser, $this->textbox1,
 432                                                                                                                         $this->summary, $this->minoredit,
 433                                                                                                                         $this->watchthis, NULL));
 434                                 }
 435                                 return;
 436                         }
 437
 438                         # Article exists. Check for edit conflict.
 439
 440                         $this->mArticle->clear(); # Force reload of dates, etc.
 441                         $this->mArticle->forUpdate( true ); # Lock the article
 442
 443                         if( ( $this->section != 'new' ) &&
 444                                 ($this->mArticle->getTimestamp() != $this->edittime ) ) {
 445                                 $isConflict = true;
 446                         }
 447                         $userid = $wgUser->getID();
 448
 449                         if ( $isConflict) {
 450                                 wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 451                                         $this->mArticle->getTimestamp() . "'\n" );
 452                                 $text = $this->mArticle->getTextOfLastEditWithSectionReplacedOrAdded(
 453                                         $this->section, $this->textbox1, $this->summary, $this->edittime);
 454                         }
 455                         else {
 456                                 wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 457                                 $text = $this->mArticle->getTextOfLastEditWithSectionReplacedOrAdded(
 458                                         $this->section, $this->textbox1, $this->summary);
 459                         }
 460                         # Suppress edit conflict with self
 461
 462                         if ( ( 0 != $userid ) && ( $this->mArticle->getUser() == $userid ) ) {
 463                                 wfDebug( "Suppressing edit conflict, same user.\n" );
 464                                 $isConflict = false;
 465                         } else {
 466                                 # switch from section editing to normal editing in edit conflict
 467                                 if($isConflict) {
 468                                         # Attempt merge
 469                                         if( $this->mergeChangesInto( $text ) ){
 470                                                 // Successful merge! Maybe we should tell the user the good news?
 471                                                 $isConflict = false;
 472                                                 wfDebug( "Suppressing edit conflict, successful merge.\n" );
 473                                         } else {
 474                                                 $this->section = '';
 475                                                 $this->textbox1 = $text;
 476                                                 wfDebug( "Keeping edit conflict, failed merge.\n" );
 477                                         }
 478                                 }
 479                         }
 480                         if ( ! $isConflict ) {
 481                                 # All's well
 482                                 $sectionanchor = '';
 483                                 if( $this->section == 'new' ) {
 484                                         if( $this->summary != '' ) {
 485                                                 $sectionanchor = $this->sectionAnchor( $this->summary );
 486                                         }
 487                                 } elseif( $this->section != '' ) {
 488                                         # Try to get a section anchor from the section source, redirect to edited section if header found
 489                                         # XXX: might be better to integrate this into Article::getTextOfLastEditWithSectionReplacedOrAdded
 490                                         # for duplicate heading checking and maybe parsing
 491                                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 492                                         # we can't deal with anchors, includes, html etc in the header for now,
 493                                         # headline would need to be parsed to improve this
 494                                         #if($hasmatch and strlen($matches[2]) > 0 and !preg_match( "/[\\['{<>]/", $matches[2])) {
 495                                         if($hasmatch and strlen($matches[2]) > 0) {
 496                                                 $sectionanchor = $this->sectionAnchor( $matches[2] );
 497                                         }
 498                                 }
 499
 500                                 // Save errors may fall down to the edit form, but we've now
 501                                 // merged the section into full text. Clear the section field
 502                                 // so that later submission of conflict forms won't try to
 503                                 // replace that into a duplicated mess.
 504                                 $this->textbox1 = $text;
 505                                 $this->section = '';
 506
 507                                 if (wfRunHooks('ArticleSave', array(&$this->mArticle, &$wgUser, &$text,
 508                                                                 &$this->summary, &$this->minoredit,
 509                                                                 &$this->watchthis, &$sectionanchor)))
 510                                 {
 511                                         # update the article here
 512                                         if($this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
 513                                                                            $this->watchthis, '', $sectionanchor ))
 514                                         {
 515                                                 wfRunHooks('ArticleSaveComplete',
 516                                                         array(&$this->mArticle, &$wgUser, $text,
 517                                                                 $this->summary, $this->minoredit,
 518                                                                 $this->watchthis, $sectionanchor));
 519                                                 return;
 520                                         } else {
 521                                                 $isConflict = true;
 522                                         }
 523                                 }
 524                         }
 525                 }
 526                 }
 527                 # First time through: get contents, set time for conflict
 528                 # checking, etc.
 529
 530                 if ( 'initial' == $formtype || $firsttime ) {
 531                         $this->edittime = $this->mArticle->getTimestamp();
 532                         $this->textbox1 = $this->mArticle->getContent( true );
 533                         $this->summary = '';
 534                         $this->proxyCheck();
 535                 }
 536                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 537
 538                 # Enabled article-related sidebar, toplinks, etc.
 539                 $wgOut->setArticleRelated( true );
 540
 541                 if ( $isConflict ) {
 542                         $s = wfMsg( 'editconflict', $this->mTitle->getPrefixedText() );
 543                         $wgOut->setPageTitle( $s );
 544                         $wgOut->addWikiText( wfMsg( 'explainconflict' ) );
 545
 546                         $this->textbox2 = $this->textbox1;
 547                         $this->textbox1 = $this->mArticle->getContent( true );
 548                         $this->edittime = $this->mArticle->getTimestamp();
 549                 } else {
 550
 551                         if( $this->section != '' ) {
 552                                 if( $this->section == 'new' ) {
 553                                         $s = wfMsg('editingcomment', $this->mTitle->getPrefixedText() );
 554                                 } else {
 555                                         $s = wfMsg('editingsection', $this->mTitle->getPrefixedText() );
 556                                         if( !$this->preview && !$this->diff ) {
 557                                                 preg_match( "/^(=+)(.+)\\1/mi",
 558                                                         $this->textbox1,
 559                                                         $matches );
 560                                                 if( !empty( $matches[2] ) ) {
 561                                                         $this->summary = "/* ". trim($matches[2])." */ ";
 562                                                 }
 563                                         }
 564                                 }
 565                         } else {
 566                                 $s = wfMsg( 'editing', $this->mTitle->getPrefixedText() );
 567                         }
 568                         $wgOut->setPageTitle( $s );
 569                         if ( !$this->checkUnicodeCompliantBrowser() ) {
 570                                 $this->mArticle->setOldSubtitle();
 571                                 $wgOut->addWikiText( wfMsg( 'nonunicodebrowser') );
 572                         }
 573                         if ( isset( $this->mArticle )
 574                              && isset( $this->mArticle->mRevision )
 575                              && !$this->mArticle->mRevision->isCurrent() ) {
 576                                 $this->mArticle->setOldSubtitle();
 577                                 $wgOut->addWikiText( wfMsg( 'editingold' ) );
 578                         }
 579                 }
 580
 581                 if( wfReadOnly() ) {
 582                         $wgOut->addWikiText( wfMsg( 'readonlywarning' ) );
 583                 } else if ( $isCssJsSubpage and 'preview' != $formtype) {
 584                         $wgOut->addWikiText( wfMsg( 'usercssjsyoucanpreview' ));
 585                 }
 586                 if( $this->mTitle->isProtected('edit') ) {
 587                         $wgOut->addWikiText( wfMsg( 'protectedpagewarning' ) );
 588                 }
 589
 590                 $kblength = (int)(strlen( $this->textbox1 ) / 1024);
 591                 if( $kblength > 29 ) {
 592                         $wgOut->addWikiText( wfMsg( 'longpagewarning', $wgLang->formatNum( $kblength ) ) );
 593                 }
 594
 595                 $rows = $wgUser->getOption( 'rows' );
 596                 $cols = $wgUser->getOption( 'cols' );
 597
 598                 $ew = $wgUser->getOption( 'editwidth' );
 599                 if ( $ew ) $ew = " style=\"width:100%\"";
 600                 else $ew = '';
 601
 602                 $q = 'action=submit';
 603                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
 604                 $action = $this->mTitle->escapeLocalURL( $q );
 605
 606                 $summary = wfMsg('summary');
 607                 $subject = wfMsg('subject');
 608                 $minor   = wfMsg('minoredit');
 609                 $watchthis = wfMsg ('watchthis');
 610                 $save = wfMsg('savearticle');
 611                 $prev = wfMsg('showpreview');
 612                 $diff = wfMsg('showdiff');
 613
 614                 $cancel = $sk->makeKnownLink( $this->mTitle->getPrefixedText(),
 615                                 wfMsg('cancel') );
 616                 $edithelpurl = $sk->makeInternalOrExternalUrl( wfMsg( 'edithelppage' ));
 617                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
 618                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
 619                         htmlspecialchars( wfMsg( 'newwindow' ) );
 620
 621                 global $wgRightsText;
 622                 $copywarn = "<div id=\"editpage-copywarn\">\n" .
 623                         wfMsg( $wgRightsText ? 'copyrightwarning' : 'copyrightwarning2',
 624                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
 625                                 $wgRightsText ) . "\n</div>";
 626
 627                 if( $wgUser->getOption('showtoolbar') and !$isCssJsSubpage ) {
 628                         # prepare toolbar for edit buttons
 629                         $toolbar = $this->getEditToolbar();
 630                 } else {
 631                         $toolbar = '';
 632                 }
 633
 634                 // activate checkboxes if user wants them to be always active
 635                 if( !$this->preview && !$this->diff ) {
 636                         if( $wgUser->getOption( 'watchdefault' ) ) $this->watchthis = true;
 637                         if( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
 638
 639                         // activate checkbox also if user is already watching the page,
 640                         // require wpWatchthis to be unset so that second condition is not
 641                         // checked unnecessarily
 642                         if( !$this->watchthis && $this->mTitle->userIsWatching() ) $this->watchthis = true;
 643                 }
 644
 645                 $minoredithtml = '';
 646
 647                 if ( $wgUser->isLoggedIn() || $wgAllowAnonymousMinor ) {
 648                         $minoredithtml =
 649                                 "<input tabindex='3' type='checkbox' value='1' name='wpMinoredit'".($this->minoredit?" checked='checked'":"").
 650                                 " accesskey='".wfMsg('accesskey-minoredit')."' id='wpMinoredit' />".
 651                                 "<label for='wpMinoredit' title='".wfMsg('tooltip-minoredit')."'>{$minor}</label>";
 652                 }
 653
 654                 $watchhtml = '';
 655
 656                 if ( $wgUser->isLoggedIn() ) {
 657                         $watchhtml = "<input tabindex='4' type='checkbox' name='wpWatchthis'".
 658                                 ($this->watchthis?" checked='checked'":"").
 659                                 " accesskey=\"".htmlspecialchars(wfMsg('accesskey-watch'))."\" id='wpWatchthis'  />".
 660                                 "<label for='wpWatchthis' title=\"" .
 661                                         htmlspecialchars(wfMsg('tooltip-watch'))."\">{$watchthis}</label>";
 662                 }
 663
 664                 $checkboxhtml = $minoredithtml . $watchhtml . '<br />';
 665
 666                 $wgOut->addHTML( '<div id="wikiPreview">' );
 667                 if ( 'preview' == $formtype) {
 668                         $previewOutput = $this->getPreviewText( $isConflict, $isCssJsSubpage );
 669                         if ( $wgUser->getOption('previewontop' ) ) {
 670                                 $wgOut->addHTML( $previewOutput );
 671                                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
 672                                         $this->mArticle->closeShowCategory();
 673                                 }
 674                                 $wgOut->addHTML( "<br style=\"clear:both;\" />\n" );
 675                         }
 676                 }
 677                 $wgOut->addHTML( '</div>' );
 678                 if ( 'diff' == $formtype ) {
 679                         if ( $wgUser->getOption('previewontop' ) ) {
 680                                 $wgOut->addHTML( $this->getDiff() );
 681                         }
 682                 }
 683
 684
 685                 # if this is a comment, show a subject line at the top, which is also the edit summary.
 686                 # Otherwise, show a summary field at the bottom
 687                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
 688                         if( $this->section == 'new' ) {
 689                                 $commentsubject="{$subject}: <input tabindex='1' type='text' value=\"$summarytext\" name=\"wpSummary\" maxlength='200' size='60' /><br />";
 690                                 $editsummary = '';
 691                         } else {
 692                                 $commentsubject = '';
 693                                 $editsummary="{$summary}: <input tabindex='2' type='text' value=\"$summarytext\" name=\"wpSummary\" maxlength='200' size='60' /><br />";
 694                         }
 695
 696                 if( !$this->preview && !$this->diff ) {
 697                 # Don't select the edit box on preview; this interferes with seeing what's going on.
 698                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
 699                 }
 700                 # Prepare a list of templates used by this page
 701                 $templates = '';
 702                 $articleTemplates = $this->mArticle->getUsedTemplates();
 703                 if ( count( $articleTemplates ) > 0 ) {
 704                         $templates = '<br />'. wfMsg( 'templatesused' ) . '<ul>';
 705                         foreach ( $articleTemplates as $tpl ) {
 706                                 if ( $titleObj = Title::makeTitle( NS_TEMPLATE, $tpl ) ) {
 707                                         $templates .= '<li>' . $sk->makeLinkObj( $titleObj ) . '</li>';
 708                                 }
 709                         }
 710                         $templates .= '</ul>';
 711                 }
 712
 713                 global $wgLivePreview, $wgStylePath;
 714                 /**
 715                  * Live Preview lets us fetch rendered preview page content and
 716                  * add it to the page without refreshing the whole page.
 717                  * Set up the button for it; if not supported by the browser
 718                  * it will fall through to the normal form submission method.
 719                  */
 720                 if( $wgLivePreview ) {
 721                         global $wgJsMimeType;
 722                         $wgOut->addHTML( '<script type="'.$wgJsMimeType.'" src="' .
 723                                 htmlspecialchars( $wgStylePath . '/common/preview.js' ) .
 724                                 '"></script>' . "\n" );
 725                         $liveAction = $wgTitle->getLocalUrl( 'action=submit&wpPreview=true&live=true' );
 726                         $liveOnclick = 'onclick="return !livePreview('.
 727                                 'getElementById(\'wikiPreview\'),' .
 728                                 'editform.wpTextbox1.value,' .
 729                                 htmlspecialchars( '"' . $liveAction . '"' ) . ')"';
 730                 } else {
 731                         $liveOnclick = '';
 732                 }
 733
 734                 global $wgUseMetadataEdit ;
 735                 if ( $wgUseMetadataEdit ) {
 736                         $metadata = $this->mMetaData ;
 737                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
 738                         $helppage = Title::newFromText( wfMsg( "metadata_page" ) ) ;
 739                         $top = wfMsg( 'metadata', $helppage->getInternalURL() );
 740                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
 741                 }
 742                 else $metadata = "" ;
 743
 744                 $hidden = '';
 745                 $recreate = '';
 746                 if ($confirmdelete) {
 747                         if ( 'save' != $formtype ) {
 748                                 $wgOut->addWikiText( wfMsg('deletedwhileediting'));
 749                         } else {
 750                                 // Hide the toolbar and edit area, use can click preview to get it back
 751                                 // Add an confirmation checkbox and explanation.
 752                                 $toolbar = '';
 753                                 $hidden = 'type="hidden" style="display:none;"';
 754                                 $recreate = $wgOut->parse( wfMsg( 'confirmrecreate',  $query->user_name , $query->log_comment ));
 755                                 $recreate .=
 756                                         "<br /><input tabindex='1' type='checkbox' value='1' name='wpRecreate' id='wpRecreate' />".
 757                                         "<label for='wpRecreate' title='".wfMsg('tooltip-recreate')."'>". wfMsg('recreate')."</label>";
 758                         }
 759                 }
 760
 761                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
 762                         ? ""
 763                         : "<input type='hidden' name=\"safemode\" value='1' />\n";
 764
 765                 $wgOut->addHTML( <<<END
 766 {$toolbar}
 767 <form id="editform" name="editform" method="post" action="$action"
 768 enctype="multipart/form-data">
 769 $recreate
 770 {$commentsubject}
 771 <textarea tabindex='1' accesskey="," name="wpTextbox1" rows='{$rows}'
 772 cols='{$cols}'{$ew} $hidden>
 773 END
 774 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox1 ) ) .
 775 "
 776 </textarea>
 777 {$metadata}
 778 <br />{$editsummary}
 779 {$checkboxhtml}
 780 {$safemodehtml}
 781 <input tabindex='5' id='wpSave' type='submit' value=\"{$save}\" name=\"wpSave\" accesskey=\"".wfMsg('accesskey-save')."\"".
 782 " title=\"".wfMsg('tooltip-save')."\"/>
 783 <input tabindex='6' id='wpPreview' type='submit' $liveOnclick value=\"{$prev}\" name=\"wpPreview\" accesskey=\"".wfMsg('accesskey-preview')."\"".
 784 " title=\"".wfMsg('tooltip-preview')."\"/>
 785 <input tabindex='7' id='wpDiff' type='submit' value=\"{$diff}\" name=\"wpDiff\" accesskey=\"".wfMsg('accesskey-diff')."\"".
 786 " title=\"".wfMsg('tooltip-diff')."\"/>
 787 <em>{$cancel}</em> | <em>{$edithelp}</em>{$templates}" );
 788                 $wgOut->addWikiText( $copywarn );
 789                 $wgOut->addHTML( "
 790 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
 791 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
 792 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n" );
 793
 794                 if ( $wgUser->isLoggedIn() ) {
 795                         /**
 796                          * To make it harder for someone to slip a user a page
 797                          * which submits an edit form to the wiki without their
 798                          * knowledge, a random token is associated with the login
 799                          * session. If it's not passed back with the submission,
 800                          * we won't save the page, or render user JavaScript and
 801                          * CSS previews.
 802                          */
 803                         $token = htmlspecialchars( $wgUser->editToken() );
 804                         $wgOut->addHTML( "
 805 <input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
 806                 }
 807
 808
 809                 if ( $isConflict ) {
 810                         require_once( "DifferenceEngine.php" );
 811                         $wgOut->addWikiText( '==' . wfMsg( "yourdiff" ) . '==' );
 812                         DifferenceEngine::showDiff( $this->textbox2, $this->textbox1,
 813                           wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
 814
 815                         $wgOut->addWikiText( '==' . wfMsg( "yourtext" ) . '==' );
 816                         $wgOut->addHTML( "<textarea tabindex=6 id='wpTextbox2' name=\"wpTextbox2\" rows='{$rows}' cols='{$cols}' wrap='virtual'>"
 817 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox2 ) ) .
 818 "
 819 </textarea>" );
 820                 }
 821                 $wgOut->addHTML( "</form>\n" );
 822                 if ( $formtype == 'preview' && !$wgUser->getOption( 'previewontop' ) ) {
 823                         $wgOut->addHTML( '<div id="wikiPreview">' . $previewOutput . '</div>' );
 824                 }
 825                 if ( $formtype == 'diff' && !$wgUser->getOption( 'previewontop' ) ) {
 826                         #$wgOut->addHTML( '<div id="wikiPreview">' . $difftext . '</div>' );
 827                         $wgOut->addHTML( $this->getDiff() );
 828                 }
 829         }
 830
 831         function getLastDelete() {
 832                 $dbr =& wfGetDB( DB_SLAVE );
 833                 $fname = 'EditPage::getLastDelete';
 834                 $res = $dbr->select(
 835                         array( 'logging', 'user' ),
 836                         array( 'log_type',
 837                                'log_action',
 838                                'log_timestamp',
 839                                'log_user',
 840                                'log_namespace',
 841                                'log_title',
 842                                'log_comment',
 843                                'log_params',
 844                                'user_name', ),
 845                         array( 'log_namespace="' . $this->mTitle->getNamespace() . '"',
 846                                'log_title="' . $this->mTitle->getDBkey() . '"',
 847                                'log_type="delete"',
 848                                'log_action="delete"',
 849                                'user_id=log_user' ),
 850                         $fname,
 851                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
 852
 853                 if($dbr->numRows($res) == 1) {
 854                         while ( $x = $dbr->fetchObject ( $res ) )
 855                                 $data = $x;
 856                         $dbr->freeResult ( $res ) ;
 857                 } else {
 858                         $data = null;
 859                 }
 860                 return $data;
 861         }
 862
 863         /**
 864          * @todo document
 865          */
 866         function getPreviewText( $isConflict, $isCssJsSubpage ) {
 867                 global $wgOut, $wgUser, $wgTitle, $wgParser, $wgAllowDiffPreview, $wgEnableDiffPreviewPreference;
 868                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
 869                         "<p class='previewnote'>" . htmlspecialchars( wfMsg( 'previewnote' ) ) . "</p>\n";
 870                 if ( $isConflict ) {
 871                         $previewhead.='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) .
 872                                 "</h2>\n";
 873                 }
 874
 875                 $parserOptions = ParserOptions::newFromUser( $wgUser );
 876                 $parserOptions->setEditSection( false );
 877
 878                 # don't parse user css/js, show message about preview
 879                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
 880
 881                 if ( $isCssJsSubpage ) {
 882                         if(preg_match("/\\.css$/", $wgTitle->getText() ) ) {
 883                                 $previewtext = wfMsg('usercsspreview');
 884                         } else if(preg_match("/\\.js$/", $wgTitle->getText() ) ) {
 885                                 $previewtext = wfMsg('userjspreview');
 886                         }
 887                         $parserOutput = $wgParser->parse( $previewtext , $wgTitle, $parserOptions );
 888                         $wgOut->addHTML( $parserOutput->mText );
 889                         return $previewhead;
 890                 } else {
 891                         # if user want to see preview when he edit an article
 892                         if( $wgUser->getOption('previewonfirst') and ($this->textbox1 == '')) {
 893                                 $this->textbox1 = $this->mArticle->getContent(true);
 894                         }
 895
 896                         $toparse = $this->textbox1;
 897
 898                         # If we're adding a comment, we need to show the
 899                         # summary as the headline
 900                         if($this->section=="new" && $this->summary!="") {
 901                                 $toparse="== {$this->summary} ==\n\n".$toparse;
 902                         }
 903
 904                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData ;
 905
 906                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ) ."\n\n",
 907                                         $wgTitle, $parserOptions );
 908
 909                         $previewHTML = $parserOutput->mText;
 910
 911                         $wgOut->addCategoryLinks($parserOutput->getCategoryLinks());
 912                         $wgOut->addLanguageLinks($parserOutput->getLanguageLinks());
 913                         return $previewhead . $previewHTML;
 914                 }
 915         }
 916
 917         /**
 918          * @todo document
 919          */
 920         function blockedIPpage() {
 921                 global $wgOut, $wgUser, $wgContLang, $wgIP;
 922
 923                 $wgOut->setPageTitle( wfMsg( 'blockedtitle' ) );
 924                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 925                 $wgOut->setArticleRelated( false );
 926
 927                 $id = $wgUser->blockedBy();
 928                 $reason = $wgUser->blockedFor();
 929                 $ip = $wgIP;
 930
 931                 if ( is_numeric( $id ) ) {
 932                         $name = User::whoIs( $id );
 933                 } else {
 934                         $name = $id;
 935                 }
 936                 $link = '[[' . $wgContLang->getNsText( NS_USER ) .
 937                   ":{$name}|{$name}]]";
 938
 939                 $wgOut->addWikiText( wfMsg( 'blockedtext', $link, $reason, $ip, $name ) );
 940                 $wgOut->returnToMain( false );
 941         }
 942
 943         /**
 944          * @todo document
 945          */
 946         function userNotLoggedInPage() {
 947                 global $wgOut;
 948
 949                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
 950                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 951                 $wgOut->setArticleRelated( false );
 952
 953                 $wgOut->addWikiText( wfMsg( 'whitelistedittext' ) );
 954                 $wgOut->returnToMain( false );
 955         }
 956
 957         /**
 958          * @todo document
 959          */
 960         function spamPage ( $match = false )
 961         {
 962                 global $wgOut;
 963                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
 964                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 965                 $wgOut->setArticleRelated( false );
 966
 967                 $wgOut->addWikiText( wfMsg( 'spamprotectiontext' ) );
 968                 if ( $match ) {
 969                         $wgOut->addWikiText( wfMsg( 'spamprotectionmatch', "<nowiki>{$match}</nowiki>" ) );
 970                 }
 971                 $wgOut->returnToMain( false );
 972         }
 973
 974         /**
 975          * Forks processes to scan the originating IP for an open proxy server
 976          * MemCached can be used to skip IPs that have already been scanned
 977          */
 978         function proxyCheck() {
 979                 global $wgBlockOpenProxies, $wgProxyPorts, $wgProxyScriptPath;
 980                 global $wgIP, $wgUseMemCached, $wgMemc, $wgDBname, $wgProxyMemcExpiry;
 981
 982                 if ( !$wgBlockOpenProxies ) {
 983                         return;
 984                 }
 985
 986                 # Get MemCached key
 987                 $skip = false;
 988                 if ( $wgUseMemCached ) {
 989                         $mcKey = $wgDBname.':proxy:ip:'.$wgIP;
 990                         $mcValue = $wgMemc->get( $mcKey );
 991                         if ( $mcValue ) {
 992                                 $skip = true;
 993                         }
 994                 }
 995
 996                 # Fork the processes
 997                 if ( !$skip ) {
 998                         $title = Title::makeTitle( NS_SPECIAL, 'Blockme' );
 999                         $iphash = md5( $wgIP . $wgProxyKey );
1000                         $url = $title->getFullURL( 'ip='.$iphash );
1001
1002                         foreach ( $wgProxyPorts as $port ) {
1003                                 $params = implode( ' ', array(
1004                                                         escapeshellarg( $wgProxyScriptPath ),
1005                                                         escapeshellarg( $wgIP ),
1006                                                         escapeshellarg( $port ),
1007                                                         escapeshellarg( $url )
1008                                                         ));
1009                                 exec( "php $params &>/dev/null &" );
1010                         }
1011                         # Set MemCached key
1012                         if ( $wgUseMemCached ) {
1013                                 $wgMemc->set( $mcKey, 1, $wgProxyMemcExpiry );
1014                         }
1015                 }
1016         }
1017
1018         /**
1019          * @access private
1020          * @todo document
1021          */
1022         function mergeChangesInto( &$editText ){
1023                 $fname = 'EditPage::mergeChangesInto';
1024                 wfProfileIn( $fname );
1025
1026                 $db =& wfGetDB( DB_MASTER );
1027
1028                 // This is the revision the editor started from
1029                 $baseRevision = Revision::loadFromTimestamp(
1030                         $db, $this->mArticle->mTitle, $this->edittime );
1031                 if( is_null( $baseRevision ) ) {
1032                         wfProfileOut( $fname );
1033                         return false;
1034                 }
1035                 $baseText = $baseRevision->getText();
1036
1037                 // The current state, we want to merge updates into it
1038                 $currentRevision =  Revision::loadFromTitle(
1039                         $db, $this->mArticle->mTitle );
1040                 if( is_null( $currentRevision ) ) {
1041                         wfProfileOut( $fname );
1042                         return false;
1043                 }
1044                 $currentText = $currentRevision->getText();
1045
1046                 if( wfMerge( $baseText, $editText, $currentText, $result ) ){
1047                         $editText = $result;
1048                         wfProfileOut( $fname );
1049                         return true;
1050                 } else {
1051                         wfProfileOut( $fname );
1052                         return false;
1053                 }
1054         }
1055
1056
1057         function checkUnicodeCompliantBrowser() {
1058                 global $wgBrowserBlackList;
1059                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1060                 foreach ( $wgBrowserBlackList as $browser ) {
1061                         if ( preg_match($browser, $currentbrowser) ) {
1062                                 return false;
1063                         }
1064                 }
1065                 return true;
1066         }
1067
1068         /**
1069          * Format an anchor fragment as it would appear for a given section name
1070          * @param string $text
1071          * @return string
1072          * @access private
1073          */
1074         function sectionAnchor( $text ) {
1075                 $headline = Sanitizer::decodeCharReferences( $text );
1076                 # strip out HTML
1077                 $headline = preg_replace( '/<.*?' . '>/', '', $headline );
1078                 $headline = trim( $headline );
1079                 $sectionanchor = '#' . urlencode( str_replace( ' ', '_', $headline ) );
1080                 $replacearray = array(
1081                         '%3A' => ':',
1082                         '%' => '.'
1083                 );
1084                 return str_replace(
1085                         array_keys( $replacearray ),
1086                         array_values( $replacearray ),
1087                         $sectionanchor );
1088         }
1089
1090         /**
1091          * Shows a bulletin board style toolbar for common editing functions.
1092          * It can be disabled in the user preferences.
1093          * The necessary JavaScript code can be found in style/wikibits.js.
1094          */
1095         function getEditToolbar() {
1096                 global $wgStylePath, $wgLang, $wgMimeType, $wgJsMimeType;
1097
1098                 /**
1099                  * toolarray an array of arrays which each include the filename of
1100                  * the button image (without path), the opening tag, the closing tag,
1101                  * and optionally a sample text that is inserted between the two when no
1102                  * selection is highlighted.
1103                  * The tip text is shown when the user moves the mouse over the button.
1104                  *
1105                  * Already here are accesskeys (key), which are not used yet until someone
1106                  * can figure out a way to make them work in IE. However, we should make
1107                  * sure these keys are not defined on the edit page.
1108                  */
1109                 $toolarray=array(
1110                         array(  'image'=>'button_bold.png',
1111                                         'open'  =>      "\'\'\'",
1112                                         'close' =>      "\'\'\'",
1113                                         'sample'=>      wfMsg('bold_sample'),
1114                                         'tip'   =>      wfMsg('bold_tip'),
1115                                         'key'   =>      'B'
1116                                 ),
1117                         array(  'image'=>'button_italic.png',
1118                                         'open'  =>      "\'\'",
1119                                         'close' =>      "\'\'",
1120                                         'sample'=>      wfMsg('italic_sample'),
1121                                         'tip'   =>      wfMsg('italic_tip'),
1122                                         'key'   =>      'I'
1123                                 ),
1124                         array(  'image'=>'button_link.png',
1125                                         'open'  =>      '[[',
1126                                         'close' =>      ']]',
1127                                         'sample'=>      wfMsg('link_sample'),
1128                                         'tip'   =>      wfMsg('link_tip'),
1129                                         'key'   =>      'L'
1130                                 ),
1131                         array(  'image'=>'button_extlink.png',
1132                                         'open'  =>      '[',
1133                                         'close' =>      ']',
1134                                         'sample'=>      wfMsg('extlink_sample'),
1135                                         'tip'   =>      wfMsg('extlink_tip'),
1136                                         'key'   =>      'X'
1137                                 ),
1138                         array(  'image'=>'button_headline.png',
1139                                         'open'  =>      "\\n== ",
1140                                         'close' =>      " ==\\n",
1141                                         'sample'=>      wfMsg('headline_sample'),
1142                                         'tip'   =>      wfMsg('headline_tip'),
1143                                         'key'   =>      'H'
1144                                 ),
1145                         array(  'image'=>'button_image.png',
1146                                         'open'  =>      '[['.$wgLang->getNsText(NS_IMAGE).":",
1147                                         'close' =>      ']]',
1148                                         'sample'=>      wfMsg('image_sample'),
1149                                         'tip'   =>      wfMsg('image_tip'),
1150                                         'key'   =>      'D'
1151                                 ),
1152                         array(  'image' =>'button_media.png',
1153                                         'open'  =>      '[['.$wgLang->getNsText(NS_MEDIA).':',
1154                                         'close' =>      ']]',
1155                                         'sample'=>      wfMsg('media_sample'),
1156                                         'tip'   =>      wfMsg('media_tip'),
1157                                         'key'   =>      'M'
1158                                 ),
1159                         array(  'image' =>'button_math.png',
1160                                         'open'  =>      "\\<math\\>",
1161                                         'close' =>      "\\</math\\>",
1162                                         'sample'=>      wfMsg('math_sample'),
1163                                         'tip'   =>      wfMsg('math_tip'),
1164                                         'key'   =>      'C'
1165                                 ),
1166                         array(  'image' =>'button_nowiki.png',
1167                                         'open'  =>      "\\<nowiki\\>",
1168                                         'close' =>      "\\</nowiki\\>",
1169                                         'sample'=>      wfMsg('nowiki_sample'),
1170                                         'tip'   =>      wfMsg('nowiki_tip'),
1171                                         'key'   =>      'N'
1172                                 ),
1173                         array(  'image' =>'button_sig.png',
1174                                         'open'  =>      '--~~~~',
1175                                         'close' =>      '',
1176                                         'sample'=>      '',
1177                                         'tip'   =>      wfMsg('sig_tip'),
1178                                         'key'   =>      'Y'
1179                                 ),
1180                         array(  'image' =>'button_hr.png',
1181                                         'open'  =>      "\\n----\\n",
1182                                         'close' =>      '',
1183                                         'sample'=>      '',
1184                                         'tip'   =>      wfMsg('hr_tip'),
1185                                         'key'   =>      'R'
1186                                 )
1187                 );
1188                 $toolbar ="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
1189
1190                 $toolbar.="document.writeln(\"<div id='toolbar'>\");\n";
1191                 foreach($toolarray as $tool) {
1192
1193                         $image=$wgStylePath.'/common/images/'.$tool['image'];
1194                         $open=$tool['open'];
1195                         $close=$tool['close'];
1196                         $sample = wfEscapeJsString( $tool['sample'] );
1197
1198                         // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
1199                         // Older browsers show a "speedtip" type message only for ALT.
1200                         // Ideally these should be different, realistically they
1201                         // probably don't need to be.
1202                         $tip = wfEscapeJsString( $tool['tip'] );
1203
1204                         #$key = $tool["key"];
1205
1206                         $toolbar.="addButton('$image','$tip','$open','$close','$sample');\n";
1207                 }
1208
1209                 $toolbar.="addInfobox('" . wfEscapeJsString( wfMsg( "infobox" ) ) .
1210                         "','" . wfEscapeJsString( wfMsg( "infobox_alert" ) ) . "');\n";
1211                 $toolbar.="document.writeln(\"</div>\");\n";
1212
1213                 $toolbar.="/*]]>*/\n</script>";
1214                 return $toolbar;
1215         }
1216
1217         /**
1218          * Output preview text only. This can be sucked into the edit page
1219          * via JavaScript, and saves the server time rendering the skin as
1220          * well as theoretically being more robust on the client (doesn't
1221          * disturb the edit box's undo history, won't eat your text on
1222          * failure, etc).
1223          *
1224          * @todo This doesn't include category or interlanguage links.
1225          *       Would need to enhance it a bit, maybe wrap them in XML
1226          *       or something... that might also require more skin
1227          *       initialization, so check whether that's a problem.
1228          */
1229         function livePreview() {
1230                 global $wgOut;
1231                 $wgOut->disable();
1232                 header( 'Content-type: text/xml' );
1233                 header( 'Cache-control: no-cache' );
1234                 # FIXME
1235                 echo $this->getPreviewText( false, false );
1236         }
1237
1238
1239         /**
1240          * Get a diff between the current contents of the edit box and the
1241          * version of the page we're editing from.
1242          *
1243          * If this is a section edit, we'll replace the section as for final
1244          * save and then make a comparison.
1245          *
1246          * @return string HTML
1247          */
1248         function getDiff() {
1249                 require_once( 'DifferenceEngine.php' );
1250                 $oldtext = $this->mArticle->fetchContent();
1251                 $newtext = $this->mArticle->getTextOfLastEditWithSectionReplacedOrAdded(
1252                         $this->section, $this->textbox1, $this->summary, $this->edittime );
1253                 $oldtitle = wfMsg( 'currentrev' );
1254                 $newtitle = wfMsg( 'yourtext' );
1255                 if ( $oldtext != wfMsg( 'noarticletext' ) || $newtext != '' ) {
1256                         $difftext = DifferenceEngine::getDiff( $oldtext, $newtext, $oldtitle, $newtitle );
1257                 }
1258
1259                 return '<div id="wikiDiff">' . $difftext . '</div>';
1260         }
1261
1262         /**
1263          * Filter an input field through a Unicode de-armoring process if it
1264          * came from an old browser with known broken Unicode editing issues.
1265          *
1266          * @param WebRequest $request
1267          * @param string $field
1268          * @return string
1269          * @access private
1270          */
1271         function safeUnicodeInput( $request, $field ) {
1272                 $text = rtrim( $request->getText( $field ) );
1273                 return $request->getBool( 'safemode' )
1274                         ? $this->unmakesafe( $text )
1275                         : $text;
1276         }
1277
1278         /**
1279          * Filter an output field through a Unicode armoring process if it is
1280          * going to an old browser with known broken Unicode editing issues.
1281          *
1282          * @param string $text
1283          * @return string
1284          * @access private
1285          */
1286         function safeUnicodeOutput( $text ) {
1287                 global $wgContLang;
1288                 $codedText = $wgContLang->recodeForEdit( $text );
1289                 return $this->checkUnicodeCompliantBrowser()
1290                         ? $codedText
1291                         : $this->makesafe( $codedText );
1292         }
1293
1294         /**
1295          * A number of web browsers are known to corrupt non-ASCII characters
1296          * in a UTF-8 text editing environment. To protect against this,
1297          * detected browsers will be served an armored version of the text,
1298          * with non-ASCII chars converted to numeric HTML character references.
1299          *
1300          * Preexisting such character references will have a 0 added to them
1301          * to ensure that round-trips do not alter the original data.
1302          *
1303          * @param string $invalue
1304          * @return string
1305          * @access private
1306          */
1307         function makesafe( $invalue ) {
1308                 // Armor existing references for reversability.
1309                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
1310
1311                 $bytesleft = 0;
1312                 $result = "";
1313                 $working = 0;
1314                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1315                         $bytevalue = ord( $invalue{$i} );
1316                         if( $bytevalue <= 0x7F ) { //0xxx xxxx
1317                                 $result .= chr( $bytevalue );
1318                                 $bytesleft = 0;
1319                         } elseif( $bytevalue <= 0xBF ) { //10xx xxxx
1320                                 $working = $working << 6;
1321                                 $working += ($bytevalue & 0x3F);
1322                                 $bytesleft--;
1323                                 if( $bytesleft <= 0 ) {
1324                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
1325                                 }
1326                         } elseif( $bytevalue <= 0xDF ) { //110x xxxx
1327                                 $working = $bytevalue & 0x1F;
1328                                 $bytesleft = 1;
1329                         } elseif( $bytevalue <= 0xEF ) { //1110 xxxx
1330                                 $working = $bytevalue & 0x0F;
1331                                 $bytesleft = 2;
1332                         } else { //1111 0xxx
1333                                 $working = $bytevalue & 0x07;
1334                                 $bytesleft = 3;
1335                         }
1336                 }
1337                 return $result;
1338         }
1339
1340         /**
1341          * Reverse the previously applied transliteration of non-ASCII characters
1342          * back to UTF-8. Used to protect data from corruption by broken web browsers
1343          * as listed in $wgBrowserBlackList.
1344          *
1345          * @param string $invalue
1346          * @return string
1347          * @access private
1348          */
1349         function unmakesafe( $invalue ) {
1350                 $result = "";
1351                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1352                         if( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
1353                                 $i += 3;
1354                                 $hexstring = "";
1355                                 do {
1356                                         $hexstring .= $invalue{$i};
1357                                         $i++;
1358                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
1359
1360                                 // Do some sanity checks. These aren't needed for reversability,
1361                                 // but should help keep the breakage down if the editor
1362                                 // breaks one of the entities whilst editing.
1363                                 if ((substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6)) {
1364                                         $codepoint = hexdec($hexstring);
1365                                         $result .= codepointToUtf8( $codepoint );
1366                                 } else {
1367                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
1368                                 }
1369                         } else {
1370                                 $result .= substr( $invalue, $i, 1 );
1371                         }
1372                 }
1373                 // reverse the transform that we made for reversability reasons.
1374                 return strtr( $result, array( "&#x0" => "&#x" ) );
1375         }
1376
1377
1378 }
1379
1380 ?>