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                 $fname = 'EditPage::importFormData';
 299                 wfProfileIn( $fname );
 300
 301                 if( $request->wasPosted() ) {
 302                         # These fields need to be checked for encoding.
 303                         # Also remove trailing whitespace, but don't remove _initial_
 304                         # whitespace from the text boxes. This may be significant formatting.
 305                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 306                         $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
 307                         $this->mMetaData = rtrim( $request->getText( 'metadata'   ) );
 308                         $this->summary   =        $request->getText( 'wpSummary'  );
 309
 310                         $this->edittime = $request->getVal( 'wpEdittime' );
 311                         $this->starttime = $request->getVal( 'wpStarttime' );
 312                         if( is_null( $this->edittime ) ) {
 313                                 # If the form is incomplete, force to preview.
 314                                 $this->preview  = true;
 315                         } else {
 316                                 if( $this->tokenOk( $request ) ) {
 317                                         # Some browsers will not report any submit button
 318                                         # if the user hits enter in the comment box.
 319                                         # The unmarked state will be assumed to be a save,
 320                                         # if the form seems otherwise complete.
 321                                         $this->preview = $request->getCheck( 'wpPreview' );
 322                                         $this->diff = $request->getCheck( 'wpDiff' );
 323                                 } else {
 324                                         # Page might be a hack attempt posted from
 325                                         # an external site. Preview instead of saving.
 326                                         $this->preview = true;
 327                                 }
 328                         }
 329                         $this->save    = ! ( $this->preview OR $this->diff );
 330                         if( !preg_match( '/^\d{14}$/', $this->edittime )) {
 331                                 $this->edittime = null;
 332                         }
 333
 334                         if( !preg_match( '/^\d{14}$/', $this->starttime )) {
 335                                 $this->starttime = null;
 336                         }
 337
 338                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 339
 340                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 341                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 342                 } else {
 343                         # Not a posted form? Start with nothing.
 344                         $this->textbox1  = '';
 345                         $this->textbox2  = '';
 346                         $this->mMetaData = '';
 347                         $this->summary   = '';
 348                         $this->edittime  = '';
 349                         $this->starttime = wfTimestampNow();
 350                         $this->preview   = false;
 351                         $this->save      = false;
 352                         $this->diff      = false;
 353                         $this->minoredit = false;
 354                         $this->watchthis = false;
 355                         $this->recreate  = false;
 356                 }
 357
 358                 $this->oldid = $request->getInt( 'oldid' );
 359
 360                 # Section edit can come from either the form or a link
 361                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 362
 363                 $this->live = $request->getCheck( 'live' );
 364                 $this->editintro = $request->getText( 'editintro' );
 365
 366                 wfProfileOut( $fname );
 367         }
 368
 369         /**
 370          * Make sure the form isn't faking a user's credentials.
 371          *
 372          * @param WebRequest $request
 373          * @return bool
 374          * @access private
 375          */
 376         function tokenOk( &$request ) {
 377                 global $wgUser;
 378                 if( $wgUser->isAnon() ) {
 379                         # Anonymous users may not have a session
 380                         # open. Don't tokenize.
 381                         return true;
 382                 } else {
 383                         return $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
 384                 }
 385         }
 386
 387         function showIntro() {
 388                 global $wgOut;
 389                 $addstandardintro=true;
 390                 if($this->editintro) {
 391                         $introtitle=Title::newFromText($this->editintro);
 392                         if(isset($introtitle) && $introtitle->userCanRead()) {
 393                                 $rev=Revision::newFromTitle($introtitle);
 394                                 if($rev) {
 395                                         $wgOut->addWikiText($rev->getText());
 396                                         $addstandardintro=false;
 397                                 }
 398                         }
 399                 }
 400                 if($addstandardintro) {
 401                         $wgOut->addWikiText( wfMsg( 'newarticletext' ) );
 402                 }
 403         }
 404
 405         /**
 406          * Attempt submission
 407          * @return bool false if output is done, true if the rest of the form should be displayed
 408          */
 409         function attemptSave() {
 410                 global $wgSpamRegex, $wgFilterCallback, $wgUser, $wgOut;
 411
 412                 $fname = 'EditPage::attemptSave';
 413                 wfProfileIn( $fname );
 414                 wfProfileIn( "$fname-checks" );
 415
 416                 # Reintegrate metadata
 417                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 418                 $this->mMetaData = '' ;
 419
 420                 # Check for spam
 421                 if ( $wgSpamRegex && preg_match( $wgSpamRegex, $this->textbox1, $matches ) ) {
 422                         $this->spamPage ( $matches[0] );
 423                         wfProfileOut( "$fname-checks" );
 424                         wfProfileOut( $fname );
 425                         return false;
 426                 }
 427                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section ) ) {
 428                         # Error messages or other handling should be performed by the filter function
 429                         wfProfileOut( $fname );
 430                         wfProfileOut( "$fname-checks" );
 431                         return false;
 432                 }
 433                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 434                         # Check block state against master, thus 'false'.
 435                         $this->blockedIPpage();
 436                         wfProfileOut( "$fname-checks" );
 437                         wfProfileOut( $fname );
 438                         return false;
 439                 }
 440
 441                 if ( !$wgUser->isAllowed('edit') ) {
 442                         if ( $wgUser->isAnon() ) {
 443                                 $this->userNotLoggedInPage();
 444                                 wfProfileOut( "$fname-checks" );
 445                                 wfProfileOut( $fname );
 446                                 return false;
 447                         }
 448                         else {
 449                                 $wgOut->readOnlyPage();
 450                                 wfProfileOut( $fname );
 451                                 return false;
 452                         }
 453                 }
 454
 455                 if ( wfReadOnly() ) {
 456                         $wgOut->readOnlyPage();
 457                         wfProfileOut( "$fname-checks" );
 458                         wfProfileOut( $fname );
 459                         return false;
 460                 }
 461                 if ( $wgUser->pingLimiter() ) {
 462                         $wgOut->rateLimited();
 463                         wfProfileOut( "$fname-checks" );
 464                         wfProfileOut( $fname );
 465                         return false;
 466                 }
 467
 468                 # If the article has been deleted while editing, don't save it without
 469                 # confirmation
 470                 if ( $this->deletedSinceEdit && !$this->recreate ) {
 471                         wfProfileOut( "$fname-checks" );
 472                         wfProfileOut( $fname );
 473                         return true;
 474                 }
 475
 476                 wfProfileOut( "$fname-checks" );
 477
 478                 # If article is new, insert it.
 479                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 480                 if ( 0 == $aid ) {
 481                         # Don't save a new article if it's blank.
 482                         if ( ( '' == $this->textbox1 ) ||
 483                                 ( wfMsg( 'newarticletext' ) == $this->textbox1 ) ) {
 484                                         $wgOut->redirect( $this->mTitle->getFullURL() );
 485                                         wfProfileOut( $fname );
 486                                         return false;
 487                                 }
 488
 489                         $isComment=($this->section=='new');
 490                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 491                                 $this->minoredit, $this->watchthis, false, $isComment);
 492
 493                         wfProfileOut( $fname );
 494                         return false;
 495                 }
 496
 497                 # Article exists. Check for edit conflict.
 498
 499                 $this->mArticle->clear(); # Force reload of dates, etc.
 500                 $this->mArticle->forUpdate( true ); # Lock the article
 501
 502                 if( ( $this->section != 'new' ) &&
 503                         ($this->mArticle->getTimestamp() != $this->edittime ) )
 504                 {
 505                         $this->isConflict = true;
 506                 }
 507                 $userid = $wgUser->getID();
 508
 509                 if ( $this->isConflict) {
 510                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 511                                 $this->mArticle->getTimestamp() . "'\n" );
 512                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime);
 513                 }
 514                 else {
 515                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 516                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary);
 517                 }
 518
 519                 # Suppress edit conflict with self
 520                 if ( ( 0 != $userid ) && ( $this->mArticle->getUser() == $userid ) ) {
 521                         wfDebug( "Suppressing edit conflict, same user.\n" );
 522                         $this->isConflict = false;
 523                 } else {
 524                         # switch from section editing to normal editing in edit conflict
 525                         if($this->isConflict) {
 526                                 # Attempt merge
 527                                 if( $this->mergeChangesInto( $text ) ){
 528                                         // Successful merge! Maybe we should tell the user the good news?
 529                                         $this->isConflict = false;
 530                                         wfDebug( "Suppressing edit conflict, successful merge.\n" );
 531                                 } else {
 532                                         $this->section = '';
 533                                         $this->textbox1 = $text;
 534                                         wfDebug( "Keeping edit conflict, failed merge.\n" );
 535                                 }
 536                         }
 537                 }
 538
 539                 if ( $this->isConflict ) {
 540                         wfProfileOut( $fname );
 541                         return true;
 542                 }
 543
 544                 # All's well
 545                 wfProfileIn( "$fname-sectionanchor" );
 546                 $sectionanchor = '';
 547                 if( $this->section == 'new' ) {
 548                         if( $this->summary != '' ) {
 549                                 $sectionanchor = $this->sectionAnchor( $this->summary );
 550                         }
 551                 } elseif( $this->section != '' ) {
 552                         # Try to get a section anchor from the section source, redirect to edited section if header found
 553                         # XXX: might be better to integrate this into Article::replaceSection
 554                         # for duplicate heading checking and maybe parsing
 555                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 556                         # we can't deal with anchors, includes, html etc in the header for now,
 557                         # headline would need to be parsed to improve this
 558                         if($hasmatch and strlen($matches[2]) > 0) {
 559                                 $sectionanchor = $this->sectionAnchor( $matches[2] );
 560                         }
 561                 }
 562                 wfProfileOut( "$fname-sectionanchor" );
 563
 564                 // Save errors may fall down to the edit form, but we've now
 565                 // merged the section into full text. Clear the section field
 566                 // so that later submission of conflict forms won't try to
 567                 // replace that into a duplicated mess.
 568                 $this->textbox1 = $text;
 569                 $this->section = '';
 570
 571                 # update the article here
 572                 if( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
 573                         $this->watchthis, '', $sectionanchor ) ) {
 574                         wfProfileOut( $fname );
 575                         return false;
 576                 } else {
 577                         $this->isConflict = true;
 578                 }
 579                 wfProfileOut( $fname );
 580                 return true;
 581         }
 582
 583         /**
 584          * Initialise form fields in the object
 585          * Called on the first invocation, e.g. when a user clicks an edit link
 586          */
 587         function initialiseForm() {
 588                 $this->edittime = $this->mArticle->getTimestamp();
 589                 $this->textbox1 = $this->mArticle->getContent( true );
 590                 $this->summary = '';
 591                 $this->proxyCheck();
 592         }
 593
 594         /**
 595          * Send the edit form and related headers to $wgOut
 596          */
 597         function showEditForm() {
 598                 global $wgOut, $wgUser, $wgAllowAnonymousMinor, $wgLang, $wgContLang;
 599
 600                 $fname = 'EditPage::showEditForm';
 601                 wfProfileIn( $fname );
 602
 603                 $sk =& $wgUser->getSkin();
 604
 605                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 606
 607                 # Enabled article-related sidebar, toplinks, etc.
 608                 $wgOut->setArticleRelated( true );
 609
 610                 if ( $this->isConflict ) {
 611                         $s = wfMsg( 'editconflict', $this->mTitle->getPrefixedText() );
 612                         $wgOut->setPageTitle( $s );
 613                         $wgOut->addWikiText( wfMsg( 'explainconflict' ) );
 614
 615                         $this->textbox2 = $this->textbox1;
 616                         $this->textbox1 = $this->mArticle->getContent( true );
 617                         $this->edittime = $this->mArticle->getTimestamp();
 618                 } else {
 619
 620                         if( $this->section != '' ) {
 621                                 if( $this->section == 'new' ) {
 622                                         $s = wfMsg('editingcomment', $this->mTitle->getPrefixedText() );
 623                                 } else {
 624                                         $s = wfMsg('editingsection', $this->mTitle->getPrefixedText() );
 625                                         if( !$this->preview && !$this->diff ) {
 626                                                 preg_match( "/^(=+)(.+)\\1/mi",
 627                                                         $this->textbox1,
 628                                                         $matches );
 629                                                 if( !empty( $matches[2] ) ) {
 630                                                         $this->summary = "/* ". trim($matches[2])." */ ";
 631                                                 }
 632                                         }
 633                                 }
 634                         } else {
 635                                 $s = wfMsg( 'editing', $this->mTitle->getPrefixedText() );
 636                         }
 637                         $wgOut->setPageTitle( $s );
 638                         if ( !$this->checkUnicodeCompliantBrowser() ) {
 639                                 $this->mArticle->setOldSubtitle();
 640                                 $wgOut->addWikiText( wfMsg( 'nonunicodebrowser') );
 641                         }
 642                         if ( isset( $this->mArticle )
 643                              && isset( $this->mArticle->mRevision )
 644                              && !$this->mArticle->mRevision->isCurrent() ) {
 645                                 $this->mArticle->setOldSubtitle();
 646                                 $wgOut->addWikiText( wfMsg( 'editingold' ) );
 647                         }
 648                 }
 649
 650                 if( wfReadOnly() ) {
 651                         $wgOut->addWikiText( wfMsg( 'readonlywarning' ) );
 652                 } else if ( $this->isCssJsSubpage and 'preview' != $this->formtype) {
 653                         $wgOut->addWikiText( wfMsg( 'usercssjsyoucanpreview' ));
 654                 }
 655                 if( $this->mTitle->isProtected('edit') ) {
 656                         $wgOut->addWikiText( wfMsg( 'protectedpagewarning' ) );
 657                 }
 658
 659                 $kblength = (int)(strlen( $this->textbox1 ) / 1024);
 660                 if( $kblength > 29 ) {
 661                         $wgOut->addWikiText( wfMsg( 'longpagewarning', $wgLang->formatNum( $kblength ) ) );
 662                 }
 663
 664                 $rows = $wgUser->getOption( 'rows' );
 665                 $cols = $wgUser->getOption( 'cols' );
 666
 667                 $ew = $wgUser->getOption( 'editwidth' );
 668                 if ( $ew ) $ew = " style=\"width:100%\"";
 669                 else $ew = '';
 670
 671                 $q = 'action=submit';
 672                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
 673                 $action = $this->mTitle->escapeLocalURL( $q );
 674
 675                 $summary = wfMsg('summary');
 676                 $subject = wfMsg('subject');
 677                 $minor   = wfMsg('minoredit');
 678                 $watchthis = wfMsg ('watchthis');
 679                 $save = wfMsg('savearticle');
 680                 $prev = wfMsg('showpreview');
 681                 $diff = wfMsg('showdiff');
 682
 683                 $cancel = $sk->makeKnownLink( $this->mTitle->getPrefixedText(),
 684                                 wfMsg('cancel') );
 685                 $edithelpurl = $sk->makeInternalOrExternalUrl( wfMsg( 'edithelppage' ));
 686                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
 687                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
 688                         htmlspecialchars( wfMsg( 'newwindow' ) );
 689
 690                 global $wgRightsText;
 691                 $copywarn = "<div id=\"editpage-copywarn\">\n" .
 692                         wfMsg( $wgRightsText ? 'copyrightwarning' : 'copyrightwarning2',
 693                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
 694                                 $wgRightsText ) . "\n</div>";
 695
 696                 if( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
 697                         # prepare toolbar for edit buttons
 698                         $toolbar = $this->getEditToolbar();
 699                 } else {
 700                         $toolbar = '';
 701                 }
 702
 703                 // activate checkboxes if user wants them to be always active
 704                 if( !$this->preview && !$this->diff ) {
 705                         if( $wgUser->getOption( 'watchdefault' ) ) $this->watchthis = true;
 706                         if( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
 707
 708                         // activate checkbox also if user is already watching the page,
 709                         // require wpWatchthis to be unset so that second condition is not
 710                         // checked unnecessarily
 711                         if( !$this->watchthis && $this->mTitle->userIsWatching() ) $this->watchthis = true;
 712                 }
 713
 714                 $minoredithtml = '';
 715
 716                 if ( $wgUser->isLoggedIn() || $wgAllowAnonymousMinor ) {
 717                         $minoredithtml =
 718                                 "<input tabindex='3' type='checkbox' value='1' name='wpMinoredit'".($this->minoredit?" checked='checked'":"").
 719                                 " accesskey='".wfMsg('accesskey-minoredit')."' id='wpMinoredit' />".
 720                                 "<label for='wpMinoredit' title='".wfMsg('tooltip-minoredit')."'>{$minor}</label>";
 721                 }
 722
 723                 $watchhtml = '';
 724
 725                 if ( $wgUser->isLoggedIn() ) {
 726                         $watchhtml = "<input tabindex='4' type='checkbox' name='wpWatchthis'".
 727                                 ($this->watchthis?" checked='checked'":"").
 728                                 " accesskey=\"".htmlspecialchars(wfMsg('accesskey-watch'))."\" id='wpWatchthis'  />".
 729                                 "<label for='wpWatchthis' title=\"" .
 730                                         htmlspecialchars(wfMsg('tooltip-watch'))."\">{$watchthis}</label>";
 731                 }
 732
 733                 $checkboxhtml = $minoredithtml . $watchhtml . '<br />';
 734
 735                 $wgOut->addHTML( '<div id="wikiPreview">' );
 736                 if ( 'preview' == $this->formtype) {
 737                         $previewOutput = $this->getPreviewText();
 738                         if ( $wgUser->getOption('previewontop' ) ) {
 739                                 $wgOut->addHTML( $previewOutput );
 740                                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
 741                                         $this->mArticle->closeShowCategory();
 742                                 }
 743                                 $wgOut->addHTML( "<br style=\"clear:both;\" />\n" );
 744                         }
 745                 }
 746                 $wgOut->addHTML( '</div>' );
 747                 if ( 'diff' == $this->formtype ) {
 748                         if ( $wgUser->getOption('previewontop' ) ) {
 749                                 $wgOut->addHTML( $this->getDiff() );
 750                         }
 751                 }
 752
 753
 754                 # if this is a comment, show a subject line at the top, which is also the edit summary.
 755                 # Otherwise, show a summary field at the bottom
 756                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
 757                 if( $this->section == 'new' ) {
 758                         $commentsubject="{$subject}: <input tabindex='1' type='text' value=\"$summarytext\" name=\"wpSummary\" maxlength='200' size='60' /><br />";
 759                         $editsummary = '';
 760                 } else {
 761                         $commentsubject = '';
 762                         $editsummary="{$summary}: <input tabindex='2' type='text' value=\"$summarytext\" name=\"wpSummary\" maxlength='200' size='60' /><br />";
 763                 }
 764
 765                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
 766                 if( !$this->preview && !$this->diff ) {
 767                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
 768                 }
 769                 $templates = $this->getTemplatesUsed();
 770
 771                 global $wgLivePreview;
 772                 if ( $wgLivePreview ) {
 773                         $liveOnclick = $this->doLivePreviewScript();
 774                 } else {
 775                         $liveOnclick = '';
 776                 }
 777
 778                 global $wgUseMetadataEdit ;
 779                 if ( $wgUseMetadataEdit ) {
 780                         $metadata = $this->mMetaData ;
 781                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
 782                         $helppage = Title::newFromText( wfMsg( "metadata_page" ) ) ;
 783                         $top = wfMsg( 'metadata', $helppage->getInternalURL() );
 784                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
 785                 }
 786                 else $metadata = "" ;
 787
 788                 $hidden = '';
 789                 $recreate = '';
 790                 if ($this->deletedSinceEdit) {
 791                         if ( 'save' != $this->formtype ) {
 792                                 $wgOut->addWikiText( wfMsg('deletedwhileediting'));
 793                         } else {
 794                                 // Hide the toolbar and edit area, use can click preview to get it back
 795                                 // Add an confirmation checkbox and explanation.
 796                                 $toolbar = '';
 797                                 $hidden = 'type="hidden" style="display:none;"';
 798                                 $recreate = $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ));
 799                                 $recreate .=
 800                                         "<br /><input tabindex='1' type='checkbox' value='1' name='wpRecreate' id='wpRecreate' />".
 801                                         "<label for='wpRecreate' title='".wfMsg('tooltip-recreate')."'>". wfMsg('recreate')."</label>";
 802                         }
 803                 }
 804
 805                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
 806                         ? ""
 807                         : "<input type='hidden' name=\"safemode\" value='1' />\n";
 808
 809                 $wgOut->addHTML( <<<END
 810 {$toolbar}
 811 <form id="editform" name="editform" method="post" action="$action"
 812 enctype="multipart/form-data">
 813 $recreate
 814 {$commentsubject}
 815 <textarea tabindex='1' accesskey="," name="wpTextbox1" rows='{$rows}'
 816 cols='{$cols}'{$ew} $hidden>
 817 END
 818 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox1 ) ) .
 819 "
 820 </textarea>
 821 {$metadata}
 822 <br />{$editsummary}
 823 {$checkboxhtml}
 824 {$safemodehtml}
 825 <input tabindex='5' id='wpSave' type='submit' value=\"{$save}\" name=\"wpSave\" accesskey=\"".wfMsg('accesskey-save')."\"".
 826 " title=\"".wfMsg('tooltip-save')."\"/>
 827 <input tabindex='6' id='wpPreview' type='submit' $liveOnclick value=\"{$prev}\" name=\"wpPreview\" accesskey=\"".wfMsg('accesskey-preview')."\"".
 828 " title=\"".wfMsg('tooltip-preview')."\"/>
 829 <input tabindex='7' id='wpDiff' type='submit' value=\"{$diff}\" name=\"wpDiff\" accesskey=\"".wfMsg('accesskey-diff')."\"".
 830 " title=\"".wfMsg('tooltip-diff')."\"/>
 831 <em>{$cancel}</em> | <em>{$edithelp}</em>{$templates}" );
 832                 $wgOut->addWikiText( $copywarn );
 833                 $wgOut->addHTML( "
 834 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
 835 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
 836 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n" );
 837
 838                 if ( $wgUser->isLoggedIn() ) {
 839                         /**
 840                          * To make it harder for someone to slip a user a page
 841                          * which submits an edit form to the wiki without their
 842                          * knowledge, a random token is associated with the login
 843                          * session. If it's not passed back with the submission,
 844                          * we won't save the page, or render user JavaScript and
 845                          * CSS previews.
 846                          */
 847                         $token = htmlspecialchars( $wgUser->editToken() );
 848                         $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
 849                 }
 850
 851
 852                 if ( $this->isConflict ) {
 853                         require_once( "DifferenceEngine.php" );
 854                         $wgOut->addWikiText( '==' . wfMsg( "yourdiff" ) . '==' );
 855                         DifferenceEngine::showDiff( $this->textbox2, $this->textbox1,
 856                           wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
 857
 858                         $wgOut->addWikiText( '==' . wfMsg( "yourtext" ) . '==' );
 859                         $wgOut->addHTML( "<textarea tabindex=6 id='wpTextbox2' name=\"wpTextbox2\" rows='{$rows}' cols='{$cols}' wrap='virtual'>"
 860                                 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox2 ) ) . "\n</textarea>" );
 861                 }
 862                 $wgOut->addHTML( "</form>\n" );
 863                 if ( $this->formtype == 'preview' && !$wgUser->getOption( 'previewontop' ) ) {
 864                         $wgOut->addHTML( '<div id="wikiPreview">' . $previewOutput . '</div>' );
 865                 }
 866                 if ( $this->formtype == 'diff' && !$wgUser->getOption( 'previewontop' ) ) {
 867                         #$wgOut->addHTML( '<div id="wikiPreview">' . $difftext . '</div>' );
 868                         $wgOut->addHTML( $this->getDiff() );
 869                 }
 870
 871                 wfProfileOut( $fname );
 872         }
 873
 874         /**
 875          * Prepare a list of templates used by this page. Returns HTML.
 876          */
 877         function getTemplatesUsed() {
 878                 global $wgUser;
 879
 880                 $fname = 'EditPage::getTemplatesUsed';
 881                 wfProfileIn( $fname );
 882
 883                 $sk =& $wgUser->getSkin();
 884
 885                 $templates = '';
 886                 $articleTemplates = $this->mArticle->getUsedTemplates();
 887                 if ( count( $articleTemplates ) > 0 ) {
 888                         $templates = '<br />'. wfMsg( 'templatesused' ) . '<ul>';
 889                         foreach ( $articleTemplates as $tpl ) {
 890                                 if ( $titleObj = Title::makeTitle( NS_TEMPLATE, $tpl ) ) {
 891                                         $templates .= '<li>' . $sk->makeLinkObj( $titleObj ) . '</li>';
 892                                 }
 893                         }
 894                         $templates .= '</ul>';
 895                 }
 896                 wfProfileOut( $fname );
 897                 return $templates;
 898         }
 899
 900         /**
 901          * Live Preview lets us fetch rendered preview page content and
 902          * add it to the page without refreshing the whole page.
 903          * If not supported by the browser it will fall through to the normal form
 904          * submission method.
 905          *
 906          * This function outputs a script tag to support live preview, and
 907          * returns an onclick handler which should be added to the attributes
 908          * of the preview button
 909          */
 910         function doLivePreviewScript() {
 911                 global $wgStylePath, $wgJsMimeType, $wgOut;
 912                 $wgOut->addHTML( '<script type="'.$wgJsMimeType.'" src="' .
 913                         htmlspecialchars( $wgStylePath . '/common/preview.js' ) .
 914                         '"></script>' . "\n" );
 915                 $liveAction = $wgTitle->getLocalUrl( 'action=submit&wpPreview=true&live=true' );
 916                 return 'onclick="return !livePreview('.
 917                         'getElementById(\'wikiPreview\'),' .
 918                         'editform.wpTextbox1.value,' .
 919                         htmlspecialchars( '"' . $liveAction . '"' ) . ')"';
 920         }
 921
 922         function getLastDelete() {
 923                 $dbr =& wfGetDB( DB_SLAVE );
 924                 $fname = 'EditPage::getLastDelete';
 925                 $res = $dbr->select(
 926                         array( 'logging', 'user' ),
 927                         array( 'log_type',
 928                                'log_action',
 929                                'log_timestamp',
 930                                'log_user',
 931                                'log_namespace',
 932                                'log_title',
 933                                'log_comment',
 934                                'log_params',
 935                                'user_name', ),
 936                         array( 'log_namespace' => $this->mTitle->getNamespace(),
 937                                'log_title' => $this->mTitle->getDBkey(),
 938                                'log_type' => 'delete',
 939                                'log_action' => 'delete',
 940                                'user_id=log_user' ),
 941                         $fname,
 942                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
 943
 944                 if($dbr->numRows($res) == 1) {
 945                         while ( $x = $dbr->fetchObject ( $res ) )
 946                                 $data = $x;
 947                         $dbr->freeResult ( $res ) ;
 948                 } else {
 949                         $data = null;
 950                 }
 951                 return $data;
 952         }
 953
 954         /**
 955          * @todo document
 956          */
 957         function getPreviewText() {
 958                 global $wgOut, $wgUser, $wgTitle, $wgParser, $wgAllowDiffPreview, $wgEnableDiffPreviewPreference;
 959
 960                 $fname = 'EditPage::getPreviewText';
 961                 wfProfileIn( $fname );
 962
 963                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
 964                         "<p class='previewnote'>" . htmlspecialchars( wfMsg( 'previewnote' ) ) . "</p>\n";
 965                 if ( $this->isConflict ) {
 966                         $previewhead.='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) .
 967                                 "</h2>\n";
 968                 }
 969
 970                 $parserOptions = ParserOptions::newFromUser( $wgUser );
 971                 $parserOptions->setEditSection( false );
 972
 973                 # don't parse user css/js, show message about preview
 974                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
 975
 976                 if ( $this->isCssJsSubpage ) {
 977                         if(preg_match("/\\.css$/", $wgTitle->getText() ) ) {
 978                                 $previewtext = wfMsg('usercsspreview');
 979                         } else if(preg_match("/\\.js$/", $wgTitle->getText() ) ) {
 980                                 $previewtext = wfMsg('userjspreview');
 981                         }
 982                         $parserOutput = $wgParser->parse( $previewtext , $wgTitle, $parserOptions );
 983                         $wgOut->addHTML( $parserOutput->mText );
 984                         wfProfileOut( $fname );
 985                         return $previewhead;
 986                 } else {
 987                         # if user want to see preview when he edit an article
 988                         if( $wgUser->getOption('previewonfirst') and ($this->textbox1 == '')) {
 989                                 $this->textbox1 = $this->mArticle->getContent(true);
 990                         }
 991
 992                         $toparse = $this->textbox1;
 993
 994                         # If we're adding a comment, we need to show the
 995                         # summary as the headline
 996                         if($this->section=="new" && $this->summary!="") {
 997                                 $toparse="== {$this->summary} ==\n\n".$toparse;
 998                         }
 999
1000                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData ;
1001
1002                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ) ."\n\n",
1003                                         $wgTitle, $parserOptions );
1004
1005                         $previewHTML = $parserOutput->mText;
1006
1007                         $wgOut->addCategoryLinks($parserOutput->getCategoryLinks());
1008                         $wgOut->addLanguageLinks($parserOutput->getLanguageLinks());
1009
1010                         wfProfileOut( $fname );
1011                         return $previewhead . $previewHTML;
1012                 }
1013         }
1014
1015         /**
1016          * @todo document
1017          */
1018         function blockedIPpage() {
1019                 global $wgOut, $wgUser, $wgContLang, $wgIP;
1020
1021                 $wgOut->setPageTitle( wfMsg( 'blockedtitle' ) );
1022                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1023                 $wgOut->setArticleRelated( false );
1024
1025                 $id = $wgUser->blockedBy();
1026                 $reason = $wgUser->blockedFor();
1027                 $ip = $wgIP;
1028
1029                 if ( is_numeric( $id ) ) {
1030                         $name = User::whoIs( $id );
1031                 } else {
1032                         $name = $id;
1033                 }
1034                 $link = '[[' . $wgContLang->getNsText( NS_USER ) .
1035                   ":{$name}|{$name}]]";
1036
1037                 $wgOut->addWikiText( wfMsg( 'blockedtext', $link, $reason, $ip, $name ) );
1038                 $wgOut->returnToMain( false );
1039         }
1040
1041         /**
1042          * @todo document
1043          */
1044         function userNotLoggedInPage() {
1045                 global $wgOut;
1046
1047                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1048                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1049                 $wgOut->setArticleRelated( false );
1050
1051                 $wgOut->addWikiText( wfMsg( 'whitelistedittext' ) );
1052                 $wgOut->returnToMain( false );
1053         }
1054
1055         /**
1056          * @todo document
1057          */
1058         function spamPage ( $match = false )
1059         {
1060                 global $wgOut;
1061                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1062                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1063                 $wgOut->setArticleRelated( false );
1064
1065                 $wgOut->addWikiText( wfMsg( 'spamprotectiontext' ) );
1066                 if ( $match ) {
1067                         $wgOut->addWikiText( wfMsg( 'spamprotectionmatch', "<nowiki>{$match}</nowiki>" ) );
1068                 }
1069                 $wgOut->returnToMain( false );
1070         }
1071
1072         /**
1073          * Forks processes to scan the originating IP for an open proxy server
1074          * MemCached can be used to skip IPs that have already been scanned
1075          */
1076         function proxyCheck() {
1077                 global $wgBlockOpenProxies, $wgProxyPorts, $wgProxyScriptPath;
1078                 global $wgIP, $wgUseMemCached, $wgMemc, $wgDBname, $wgProxyMemcExpiry;
1079
1080                 if ( !$wgBlockOpenProxies ) {
1081                         return;
1082                 }
1083
1084                 # Get MemCached key
1085                 $skip = false;
1086                 if ( $wgUseMemCached ) {
1087                         $mcKey = $wgDBname.':proxy:ip:'.$wgIP;
1088                         $mcValue = $wgMemc->get( $mcKey );
1089                         if ( $mcValue ) {
1090                                 $skip = true;
1091                         }
1092                 }
1093
1094                 # Fork the processes
1095                 if ( !$skip ) {
1096                         $title = Title::makeTitle( NS_SPECIAL, 'Blockme' );
1097                         $iphash = md5( $wgIP . $wgProxyKey );
1098                         $url = $title->getFullURL( 'ip='.$iphash );
1099
1100                         foreach ( $wgProxyPorts as $port ) {
1101                                 $params = implode( ' ', array(
1102                                                         escapeshellarg( $wgProxyScriptPath ),
1103                                                         escapeshellarg( $wgIP ),
1104                                                         escapeshellarg( $port ),
1105                                                         escapeshellarg( $url )
1106                                                         ));
1107                                 exec( "php $params &>/dev/null &" );
1108                         }
1109                         # Set MemCached key
1110                         if ( $wgUseMemCached ) {
1111                                 $wgMemc->set( $mcKey, 1, $wgProxyMemcExpiry );
1112                         }
1113                 }
1114         }
1115
1116         /**
1117          * @access private
1118          * @todo document
1119          */
1120         function mergeChangesInto( &$editText ){
1121                 $fname = 'EditPage::mergeChangesInto';
1122                 wfProfileIn( $fname );
1123
1124                 $db =& wfGetDB( DB_MASTER );
1125
1126                 // This is the revision the editor started from
1127                 $baseRevision = Revision::loadFromTimestamp(
1128                         $db, $this->mArticle->mTitle, $this->edittime );
1129                 if( is_null( $baseRevision ) ) {
1130                         wfProfileOut( $fname );
1131                         return false;
1132                 }
1133                 $baseText = $baseRevision->getText();
1134
1135                 // The current state, we want to merge updates into it
1136                 $currentRevision =  Revision::loadFromTitle(
1137                         $db, $this->mArticle->mTitle );
1138                 if( is_null( $currentRevision ) ) {
1139                         wfProfileOut( $fname );
1140                         return false;
1141                 }
1142                 $currentText = $currentRevision->getText();
1143
1144                 if( wfMerge( $baseText, $editText, $currentText, $result ) ){
1145                         $editText = $result;
1146                         wfProfileOut( $fname );
1147                         return true;
1148                 } else {
1149                         wfProfileOut( $fname );
1150                         return false;
1151                 }
1152         }
1153
1154
1155         function checkUnicodeCompliantBrowser() {
1156                 global $wgBrowserBlackList;
1157                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1158                 foreach ( $wgBrowserBlackList as $browser ) {
1159                         if ( preg_match($browser, $currentbrowser) ) {
1160                                 return false;
1161                         }
1162                 }
1163                 return true;
1164         }
1165
1166         /**
1167          * Format an anchor fragment as it would appear for a given section name
1168          * @param string $text
1169          * @return string
1170          * @access private
1171          */
1172         function sectionAnchor( $text ) {
1173                 $headline = Sanitizer::decodeCharReferences( $text );
1174                 # strip out HTML
1175                 $headline = preg_replace( '/<.*?' . '>/', '', $headline );
1176                 $headline = trim( $headline );
1177                 $sectionanchor = '#' . urlencode( str_replace( ' ', '_', $headline ) );
1178                 $replacearray = array(
1179                         '%3A' => ':',
1180                         '%' => '.'
1181                 );
1182                 return str_replace(
1183                         array_keys( $replacearray ),
1184                         array_values( $replacearray ),
1185                         $sectionanchor );
1186         }
1187
1188         /**
1189          * Shows a bulletin board style toolbar for common editing functions.
1190          * It can be disabled in the user preferences.
1191          * The necessary JavaScript code can be found in style/wikibits.js.
1192          */
1193         function getEditToolbar() {
1194                 global $wgStylePath, $wgLang, $wgMimeType, $wgJsMimeType;
1195
1196                 /**
1197                  * toolarray an array of arrays which each include the filename of
1198                  * the button image (without path), the opening tag, the closing tag,
1199                  * and optionally a sample text that is inserted between the two when no
1200                  * selection is highlighted.
1201                  * The tip text is shown when the user moves the mouse over the button.
1202                  *
1203                  * Already here are accesskeys (key), which are not used yet until someone
1204                  * can figure out a way to make them work in IE. However, we should make
1205                  * sure these keys are not defined on the edit page.
1206                  */
1207                 $toolarray=array(
1208                         array(  'image'=>'button_bold.png',
1209                                         'open'  =>      "\'\'\'",
1210                                         'close' =>      "\'\'\'",
1211                                         'sample'=>      wfMsg('bold_sample'),
1212                                         'tip'   =>      wfMsg('bold_tip'),
1213                                         'key'   =>      'B'
1214                                 ),
1215                         array(  'image'=>'button_italic.png',
1216                                         'open'  =>      "\'\'",
1217                                         'close' =>      "\'\'",
1218                                         'sample'=>      wfMsg('italic_sample'),
1219                                         'tip'   =>      wfMsg('italic_tip'),
1220                                         'key'   =>      'I'
1221                                 ),
1222                         array(  'image'=>'button_link.png',
1223                                         'open'  =>      '[[',
1224                                         'close' =>      ']]',
1225                                         'sample'=>      wfMsg('link_sample'),
1226                                         'tip'   =>      wfMsg('link_tip'),
1227                                         'key'   =>      'L'
1228                                 ),
1229                         array(  'image'=>'button_extlink.png',
1230                                         'open'  =>      '[',
1231                                         'close' =>      ']',
1232                                         'sample'=>      wfMsg('extlink_sample'),
1233                                         'tip'   =>      wfMsg('extlink_tip'),
1234                                         'key'   =>      'X'
1235                                 ),
1236                         array(  'image'=>'button_headline.png',
1237                                         'open'  =>      "\\n== ",
1238                                         'close' =>      " ==\\n",
1239                                         'sample'=>      wfMsg('headline_sample'),
1240                                         'tip'   =>      wfMsg('headline_tip'),
1241                                         'key'   =>      'H'
1242                                 ),
1243                         array(  'image'=>'button_image.png',
1244                                         'open'  =>      '[['.$wgLang->getNsText(NS_IMAGE).":",
1245                                         'close' =>      ']]',
1246                                         'sample'=>      wfMsg('image_sample'),
1247                                         'tip'   =>      wfMsg('image_tip'),
1248                                         'key'   =>      'D'
1249                                 ),
1250                         array(  'image' =>'button_media.png',
1251                                         'open'  =>      '[['.$wgLang->getNsText(NS_MEDIA).':',
1252                                         'close' =>      ']]',
1253                                         'sample'=>      wfMsg('media_sample'),
1254                                         'tip'   =>      wfMsg('media_tip'),
1255                                         'key'   =>      'M'
1256                                 ),
1257                         array(  'image' =>'button_math.png',
1258                                         'open'  =>      "\\<math\\>",
1259                                         'close' =>      "\\</math\\>",
1260                                         'sample'=>      wfMsg('math_sample'),
1261                                         'tip'   =>      wfMsg('math_tip'),
1262                                         'key'   =>      'C'
1263                                 ),
1264                         array(  'image' =>'button_nowiki.png',
1265                                         'open'  =>      "\\<nowiki\\>",
1266                                         'close' =>      "\\</nowiki\\>",
1267                                         'sample'=>      wfMsg('nowiki_sample'),
1268                                         'tip'   =>      wfMsg('nowiki_tip'),
1269                                         'key'   =>      'N'
1270                                 ),
1271                         array(  'image' =>'button_sig.png',
1272                                         'open'  =>      '--~~~~',
1273                                         'close' =>      '',
1274                                         'sample'=>      '',
1275                                         'tip'   =>      wfMsg('sig_tip'),
1276                                         'key'   =>      'Y'
1277                                 ),
1278                         array(  'image' =>'button_hr.png',
1279                                         'open'  =>      "\\n----\\n",
1280                                         'close' =>      '',
1281                                         'sample'=>      '',
1282                                         'tip'   =>      wfMsg('hr_tip'),
1283                                         'key'   =>      'R'
1284                                 )
1285                 );
1286                 $toolbar ="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
1287
1288                 $toolbar.="document.writeln(\"<div id='toolbar'>\");\n";
1289                 foreach($toolarray as $tool) {
1290
1291                         $image=$wgStylePath.'/common/images/'.$tool['image'];
1292                         $open=$tool['open'];
1293                         $close=$tool['close'];
1294                         $sample = wfEscapeJsString( $tool['sample'] );
1295
1296                         // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
1297                         // Older browsers show a "speedtip" type message only for ALT.
1298                         // Ideally these should be different, realistically they
1299                         // probably don't need to be.
1300                         $tip = wfEscapeJsString( $tool['tip'] );
1301
1302                         #$key = $tool["key"];
1303
1304                         $toolbar.="addButton('$image','$tip','$open','$close','$sample');\n";
1305                 }
1306
1307                 $toolbar.="addInfobox('" . wfEscapeJsString( wfMsg( "infobox" ) ) .
1308                         "','" . wfEscapeJsString( wfMsg( "infobox_alert" ) ) . "');\n";
1309                 $toolbar.="document.writeln(\"</div>\");\n";
1310
1311                 $toolbar.="/*]]>*/\n</script>";
1312                 return $toolbar;
1313         }
1314
1315         /**
1316          * Output preview text only. This can be sucked into the edit page
1317          * via JavaScript, and saves the server time rendering the skin as
1318          * well as theoretically being more robust on the client (doesn't
1319          * disturb the edit box's undo history, won't eat your text on
1320          * failure, etc).
1321          *
1322          * @todo This doesn't include category or interlanguage links.
1323          *       Would need to enhance it a bit, maybe wrap them in XML
1324          *       or something... that might also require more skin
1325          *       initialization, so check whether that's a problem.
1326          */
1327         function livePreview() {
1328                 global $wgOut;
1329                 $wgOut->disable();
1330                 header( 'Content-type: text/xml' );
1331                 header( 'Cache-control: no-cache' );
1332                 # FIXME
1333                 echo $this->getPreviewText( false, false );
1334         }
1335
1336
1337         /**
1338          * Get a diff between the current contents of the edit box and the
1339          * version of the page we're editing from.
1340          *
1341          * If this is a section edit, we'll replace the section as for final
1342          * save and then make a comparison.
1343          *
1344          * @return string HTML
1345          */
1346         function getDiff() {
1347                 require_once( 'DifferenceEngine.php' );
1348                 $oldtext = $this->mArticle->fetchContent();
1349                 $newtext = $this->mArticle->replaceSection(
1350                         $this->section, $this->textbox1, $this->summary, $this->edittime );
1351                 $oldtitle = wfMsg( 'currentrev' );
1352                 $newtitle = wfMsg( 'yourtext' );
1353                 if ( $oldtext != wfMsg( 'noarticletext' ) || $newtext != '' ) {
1354                         $difftext = DifferenceEngine::getDiff( $oldtext, $newtext, $oldtitle, $newtitle );
1355                 }
1356
1357                 return '<div id="wikiDiff">' . $difftext . '</div>';
1358         }
1359
1360         /**
1361          * Filter an input field through a Unicode de-armoring process if it
1362          * came from an old browser with known broken Unicode editing issues.
1363          *
1364          * @param WebRequest $request
1365          * @param string $field
1366          * @return string
1367          * @access private
1368          */
1369         function safeUnicodeInput( $request, $field ) {
1370                 $text = rtrim( $request->getText( $field ) );
1371                 return $request->getBool( 'safemode' )
1372                         ? $this->unmakesafe( $text )
1373                         : $text;
1374         }
1375
1376         /**
1377          * Filter an output field through a Unicode armoring process if it is
1378          * going to an old browser with known broken Unicode editing issues.
1379          *
1380          * @param string $text
1381          * @return string
1382          * @access private
1383          */
1384         function safeUnicodeOutput( $text ) {
1385                 global $wgContLang;
1386                 $codedText = $wgContLang->recodeForEdit( $text );
1387                 return $this->checkUnicodeCompliantBrowser()
1388                         ? $codedText
1389                         : $this->makesafe( $codedText );
1390         }
1391
1392         /**
1393          * A number of web browsers are known to corrupt non-ASCII characters
1394          * in a UTF-8 text editing environment. To protect against this,
1395          * detected browsers will be served an armored version of the text,
1396          * with non-ASCII chars converted to numeric HTML character references.
1397          *
1398          * Preexisting such character references will have a 0 added to them
1399          * to ensure that round-trips do not alter the original data.
1400          *
1401          * @param string $invalue
1402          * @return string
1403          * @access private
1404          */
1405         function makesafe( $invalue ) {
1406                 // Armor existing references for reversability.
1407                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
1408
1409                 $bytesleft = 0;
1410                 $result = "";
1411                 $working = 0;
1412                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1413                         $bytevalue = ord( $invalue{$i} );
1414                         if( $bytevalue <= 0x7F ) { //0xxx xxxx
1415                                 $result .= chr( $bytevalue );
1416                                 $bytesleft = 0;
1417                         } elseif( $bytevalue <= 0xBF ) { //10xx xxxx
1418                                 $working = $working << 6;
1419                                 $working += ($bytevalue & 0x3F);
1420                                 $bytesleft--;
1421                                 if( $bytesleft <= 0 ) {
1422                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
1423                                 }
1424                         } elseif( $bytevalue <= 0xDF ) { //110x xxxx
1425                                 $working = $bytevalue & 0x1F;
1426                                 $bytesleft = 1;
1427                         } elseif( $bytevalue <= 0xEF ) { //1110 xxxx
1428                                 $working = $bytevalue & 0x0F;
1429                                 $bytesleft = 2;
1430                         } else { //1111 0xxx
1431                                 $working = $bytevalue & 0x07;
1432                                 $bytesleft = 3;
1433                         }
1434                 }
1435                 return $result;
1436         }
1437
1438         /**
1439          * Reverse the previously applied transliteration of non-ASCII characters
1440          * back to UTF-8. Used to protect data from corruption by broken web browsers
1441          * as listed in $wgBrowserBlackList.
1442          *
1443          * @param string $invalue
1444          * @return string
1445          * @access private
1446          */
1447         function unmakesafe( $invalue ) {
1448                 $result = "";
1449                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1450                         if( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
1451                                 $i += 3;
1452                                 $hexstring = "";
1453                                 do {
1454                                         $hexstring .= $invalue{$i};
1455                                         $i++;
1456                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
1457
1458                                 // Do some sanity checks. These aren't needed for reversability,
1459                                 // but should help keep the breakage down if the editor
1460                                 // breaks one of the entities whilst editing.
1461                                 if ((substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6)) {
1462                                         $codepoint = hexdec($hexstring);
1463                                         $result .= codepointToUtf8( $codepoint );
1464                                 } else {
1465                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
1466                                 }
1467                         } else {
1468                                 $result .= substr( $invalue, $i, 1 );
1469                         }
1470                 }
1471                 // reverse the transform that we made for reversability reasons.
1472                 return strtr( $result, array( "&#x0" => "&#x" ) );
1473         }
1474
1475
1476 }
1477
1478 ?>