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