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
  26         # Form values
  27         var $save = false, $preview = false, $diff = false;
  28         var $minoredit = false, $watchthis = false, $recreate = false;
  29         var $textbox1 = '', $textbox2 = '', $summary = '';
  30         var $edittime = '', $section = '', $starttime = '';
  31         var $oldid = 0, $editintro = '';
  32
  33         /**
  34          * @todo document
  35          * @param $article
  36          */
  37         function EditPage( $article ) {
  38                 $this->mArticle =& $article;
  39                 global $wgTitle;
  40                 $this->mTitle =& $wgTitle;
  41         }
  42
  43         /**
  44          * This is the function that extracts metadata from the article body on the first view.
  45          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
  46          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
  47          */
  48         function extractMetaDataFromArticle () {
  49                 global $wgUseMetadataEdit , $wgMetadataWhitelist , $wgLang ;
  50                 $this->mMetaData = '' ;
  51                 if ( !$wgUseMetadataEdit ) return ;
  52                 if ( $wgMetadataWhitelist == '' ) return ;
  53                 $s = '' ;
  54                 $t = $this->mArticle->getContent ( true ) ;
  55
  56                 # MISSING : <nowiki> filtering
  57
  58                 # Categories and language links
  59                 $t = explode ( "\n" , $t ) ;
  60                 $catlow = strtolower ( $wgLang->getNsText ( NS_CATEGORY ) ) ;
  61                 $cat = $ll = array() ;
  62                 foreach ( $t AS $key => $x )
  63                 {
  64                         $y = trim ( strtolower ( $x ) ) ;
  65                         while ( substr ( $y , 0 , 2 ) == '[[' )
  66                         {
  67                                 $y = explode ( ']]' , trim ( $x ) ) ;
  68                                 $first = array_shift ( $y ) ;
  69                                 $first = explode ( ':' , $first ) ;
  70                                 $ns = array_shift ( $first ) ;
  71                                 $ns = trim ( str_replace ( '[' , '' , $ns ) ) ;
  72                                 if ( strlen ( $ns ) == 2 OR strtolower ( $ns ) == $catlow )
  73                                 {
  74                                         $add = '[[' . $ns . ':' . implode ( ':' , $first ) . ']]' ;
  75                                         if ( strtolower ( $ns ) == $catlow ) $cat[] = $add ;
  76                                         else $ll[] = $add ;
  77                                         $x = implode ( ']]' , $y ) ;
  78                                         $t[$key] = $x ;
  79                                         $y = trim ( strtolower ( $x ) ) ;
  80                                 }
  81                         }
  82                 }
  83                 if ( count ( $cat ) ) $s .= implode ( ' ' , $cat ) . "\n" ;
  84                 if ( count ( $ll ) ) $s .= implode ( ' ' , $ll ) . "\n" ;
  85                 $t = implode ( "\n" , $t ) ;
  86
  87                 # Load whitelist
  88                 $sat = array () ; # stand-alone-templates; must be lowercase
  89                 $wl_title = Title::newFromText ( $wgMetadataWhitelist ) ;
  90                 $wl_article = new Article ( $wl_title ) ;
  91                 $wl = explode ( "\n" , $wl_article->getContent(true) ) ;
  92                 foreach ( $wl AS $x )
  93                 {
  94                         $isentry = false ;
  95                         $x = trim ( $x ) ;
  96                         while ( substr ( $x , 0 , 1 ) == '*' )
  97                         {
  98                                 $isentry = true ;
  99                                 $x = trim ( substr ( $x , 1 ) ) ;
 100                         }
 101                         if ( $isentry )
 102                         {
 103                                 $sat[] = strtolower ( $x ) ;
 104                         }
 105
 106                 }
 107
 108                 # Templates, but only some
 109                 $t = explode ( '{{' , $t ) ;
 110                 $tl = array () ;
 111                 foreach ( $t AS $key => $x )
 112                 {
 113                         $y = explode ( '}}' , $x , 2 ) ;
 114                         if ( count ( $y ) == 2 )
 115                         {
 116                                 $z = $y[0] ;
 117                                 $z = explode ( '|' , $z ) ;
 118                                 $tn = array_shift ( $z ) ;
 119                                 if ( in_array ( strtolower ( $tn ) , $sat ) )
 120                                 {
 121                                         $tl[] = '{{' . $y[0] . '}}' ;
 122                                         $t[$key] = $y[1] ;
 123                                         $y = explode ( '}}' , $y[1] , 2 ) ;
 124                                 }
 125                                 else $t[$key] = '{{' . $x ;
 126                         }
 127                         else if ( $key != 0 ) $t[$key] = '{{' . $x ;
 128                         else $t[$key] = $x ;
 129                 }
 130                 if ( count ( $tl ) ) $s .= implode ( ' ' , $tl ) ;
 131                 $t = implode ( '' , $t ) ;
 132
 133                 $t = str_replace ( "\n\n\n" , "\n" , $t ) ;
 134                 $this->mArticle->mContent = $t ;
 135                 $this->mMetaData = $s ;
 136         }
 137
 138         function submit() {
 139                 $this->edit();
 140         }
 141
 142         /**
 143          * This is the function that gets called for "action=edit". It
 144          * sets up various member variables, then passes execution to
 145          * another function, usually showEditForm()
 146          *
 147          * The edit form is self-submitting, so that when things like
 148          * preview and edit conflicts occur, we get the same form back
 149          * with the extra stuff added.  Only when the final submission
 150          * is made and all is well do we actually save and redirect to
 151          * the newly-edited page.
 152          */
 153         function edit() {
 154                 global $wgOut, $wgUser, $wgRequest, $wgTitle;
 155                 // this is not an article
 156                 $wgOut->setArticleFlag(false);
 157
 158                 $this->importFormData( $wgRequest );
 159                 $this->firsttime = false;
 160
 161                 if( $this->live ) {
 162                         $this->livePreview();
 163                         return;
 164                 }
 165
 166                 if ( ! $this->mTitle->userCanEdit() ) {
 167                         $wgOut->readOnlyPage( $this->mArticle->getContent( true ), true );
 168                         return;
 169                 }
 170                 if ( !$this->preview && !$this->diff && $wgUser->isBlockedFrom( $this->mTitle, !$this->save ) ) {
 171                         # When previewing, don't check blocked state - will get caught at save time.
 172                         # Also, check when starting edition is done against slave to improve performance.
 173                         $this->blockedIPpage();
 174                         return;
 175                 }
 176                 if ( !$wgUser->isAllowed('edit') ) {
 177                         if ( $wgUser->isAnon() ) {
 178                                 $this->userNotLoggedInPage();
 179                                 return;
 180                         } else {
 181                                 $wgOut->readOnlyPage( $this->mArticle->getContent( true ), true );
 182                                 return;
 183                         }
 184                 }
 185                 if ( wfReadOnly() ) {
 186                         if( $this->save || $this->preview ) {
 187                                 $this->formtype = 'preview';
 188                         } else if ( $this->diff ) {
 189                                 $this->formtype = 'diff';
 190                         } else {
 191                                 $wgOut->readOnlyPage( $this->mArticle->getContent( true ) );
 192                                 return;
 193                         }
 194                 } else {
 195                         if ( $this->save ) {
 196                                 $this->formtype = 'save';
 197                         } else if ( $this->preview ) {
 198                                 $this->formtype = 'preview';
 199                         } else if ( $this->diff ) {
 200                                 $this->formtype = 'diff';
 201                         } else { # First time through
 202                                 $this->firsttime = true;
 203                                 if( $this->previewOnOpen() ) {
 204                                         $this->formtype = 'preview';
 205                                 } else {
 206                                         $this->extractMetaDataFromArticle () ;
 207                                         $this->formtype = 'initial';
 208                                 }
 209                         }
 210                 }
 211
 212                 $this->isConflict = false;
 213                 // css / js subpages of user pages get a special treatment
 214                 $this->isCssJsSubpage = $wgTitle->isCssJsSubpage();
 215
 216                 /* Notice that we can't use isDeleted, because it returns true if article is ever deleted
 217                  * no matter it's current state
 218                  */
 219                 $this->deletedSinceEdit = false;
 220                 if ( $this->edittime != '' ) {
 221                         /* Note that we rely on logging table, which hasn't been always there,
 222                          * but that doesn't matter, because this only applies to brand new
 223                          * deletes. This is done on every preview and save request. Move it further down
 224                          * to only perform it on saves
 225                          */
 226                         if ( $this->mTitle->isDeleted() ) {
 227                                 $query = $this->getLastDelete();
 228                                 if ( !is_null($query) ) {
 229                                         $deletetime = $query->log_timestamp;
 230                                         if ( ($deletetime - $this->starttime) > 0 ) {
 231                                                 $this->deletedSinceEdit = true;
 232                                         }
 233                                 }
 234                         }
 235                 }
 236
 237                 if(!$this->mTitle->getArticleID() && ('initial' == $this->formtype || $this->firsttime )) { # new article
 238                         $this->showIntro();
 239                 }
 240                 if( $this->mTitle->isTalkPage() ) {
 241                         $wgOut->addWikiText( wfMsg( 'talkpagetext' ) );
 242                 }
 243
 244                 # Attempt submission here.  This will check for edit conflicts,
 245                 # and redundantly check for locked database, blocked IPs, etc.
 246                 # that edit() already checked just in case someone tries to sneak
 247                 # in the back door with a hand-edited submission URL.
 248
 249                 if ( 'save' == $this->formtype ) {
 250                         if ( !$this->attemptSave() ) {
 251                                 return;
 252                         }
 253                 }
 254
 255                 # First time through: get contents, set time for conflict
 256                 # checking, etc.
 257                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 258                         $this->initialiseForm();
 259                 }
 260
 261                 $this->showEditForm();
 262         }
 263
 264         /**
 265          * Return true if this page should be previewed when the edit form
 266          * is initially opened.
 267          * @return bool
 268          * @access private
 269          */
 270         function previewOnOpen() {
 271                 global $wgUser;
 272                 return $wgUser->getOption( 'previewonfirst' ) ||
 273                         ( $this->mTitle->getNamespace() == NS_CATEGORY &&
 274                                 !$this->mTitle->exists() );
 275         }
 276
 277         /**
 278          * @todo document
 279          */
 280         function importFormData( &$request ) {
 281                 if( $request->wasPosted() ) {
 282                         # These fields need to be checked for encoding.
 283                         # Also remove trailing whitespace, but don't remove _initial_
 284                         # whitespace from the text boxes. This may be significant formatting.
 285                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 286                         $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
 287                         $this->mMetaData = rtrim( $request->getText( 'metadata'   ) );
 288                         $this->summary   =        $request->getText( 'wpSummary'  );
 289
 290                         $this->edittime = $request->getVal( 'wpEdittime' );
 291                         $this->starttime = $request->getVal( 'wpStarttime' );
 292                         if( is_null( $this->edittime ) ) {
 293                                 # If the form is incomplete, force to preview.
 294                                 $this->preview  = true;
 295                         } else {
 296                                 if( $this->tokenOk( $request ) ) {
 297                                         # Some browsers will not report any submit button
 298                                         # if the user hits enter in the comment box.
 299                                         # The unmarked state will be assumed to be a save,
 300                                         # if the form seems otherwise complete.
 301                                         $this->preview = $request->getCheck( 'wpPreview' );
 302                                         $this->diff = $request->getCheck( 'wpDiff' );
 303                                 } else {
 304                                         # Page might be a hack attempt posted from
 305                                         # an external site. Preview instead of saving.
 306                                         $this->preview = true;
 307                                 }
 308                         }
 309                         $this->save    = ! ( $this->preview OR $this->diff );
 310                         if( !preg_match( '/^\d{14}$/', $this->edittime )) {
 311                                 $this->edittime = null;
 312                         }
 313
 314                         if( !preg_match( '/^\d{14}$/', $this->starttime )) {
 315                                 $this->starttime = null;
 316                         }
 317
 318                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 319
 320                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 321                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 322                 } else {
 323                         # Not a posted form? Start with nothing.
 324                         $this->textbox1  = '';
 325                         $this->textbox2  = '';
 326                         $this->mMetaData = '';
 327                         $this->summary   = '';
 328                         $this->edittime  = '';
 329                         $this->starttime = wfTimestampNow();
 330                         $this->preview   = false;
 331                         $this->save      = false;
 332                         $this->diff      = false;
 333                         $this->minoredit = false;
 334                         $this->watchthis = false;
 335                         $this->recreate  = false;
 336                 }
 337
 338                 $this->oldid = $request->getInt( 'oldid' );
 339
 340                 # Section edit can come from either the form or a link
 341                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 342
 343                 $this->live = $request->getCheck( 'live' );
 344                 $this->editintro = $request->getText( 'editintro' );
 345
 346         }
 347
 348         /**
 349          * Make sure the form isn't faking a user's credentials.
 350          *
 351          * @param WebRequest $request
 352          * @return bool
 353          * @access private
 354          */
 355         function tokenOk( &$request ) {
 356                 global $wgUser;
 357                 if( $wgUser->isAnon() ) {
 358                         # Anonymous users may not have a session
 359                         # open. Don't tokenize.
 360                         return true;
 361                 } else {
 362                         return $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
 363                 }
 364         }
 365
 366         function showIntro() {
 367                 global $wgOut;
 368                 $addstandardintro=true;
 369                 if($this->editintro) {
 370                         $introtitle=Title::newFromText($this->editintro);
 371                         if(isset($introtitle) && $introtitle->userCanRead()) {
 372                                 $rev=Revision::newFromTitle($introtitle);
 373                                 if($rev) {
 374                                         $wgOut->addWikiText($rev->getText());
 375                                         $addstandardintro=false;
 376                                 }
 377                         }
 378                 }
 379                 if($addstandardintro) {
 380                         $wgOut->addWikiText( wfMsg( 'newarticletext' ) );
 381                 }
 382         }
 383
 384         /**
 385          * Attempt submission
 386          * @return bool false if output is done, true if the rest of the form should be displayed
 387          */
 388         function attemptSave() {
 389                 global $wgSpamRegex, $wgFilterCallback, $wgUser, $wgOut;
 390
 391                 # Reintegrate metadata
 392                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 393                 $this->mMetaData = '' ;
 394
 395                 # Check for spam
 396                 if ( $wgSpamRegex && preg_match( $wgSpamRegex, $this->textbox1, $matches ) ) {
 397                         $this->spamPage ( $matches[0] );
 398                         return false;
 399                 }
 400                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section ) ) {
 401                         # Error messages or other handling should be performed by the filter function
 402                         return false;
 403                 }
 404                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 405                         # Check block state against master, thus 'false'.
 406                         $this->blockedIPpage();
 407                         return false;
 408                 }
 409
 410                 if ( !$wgUser->isAllowed('edit') ) {
 411                         if ( $wgUser->isAnon() ) {
 412                                 $this->userNotLoggedInPage();
 413                                 return false;
 414                         }
 415                         else {
 416                                 $wgOut->readOnlyPage();
 417                                 return false;
 418                         }
 419                 }
 420
 421                 if ( wfReadOnly() ) {
 422                         $wgOut->readOnlyPage();
 423                         return false;
 424                 }
 425                 if ( $wgUser->pingLimiter() ) {
 426                         $wgOut->rateLimited();
 427                         return false;
 428                 }
 429
 430                 # If the article has been deleted while editing, don't save it without
 431                 # confirmation
 432                 if ( $this->deletedSinceEdit && !$this->recreate ) {
 433                         return true;
 434                 }
 435
 436                 # If article is new, insert it.
 437                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 438                 if ( 0 == $aid ) {
 439                         # Don't save a new article if it's blank.
 440                         if ( ( '' == $this->textbox1 ) ||
 441                                 ( wfMsg( 'newarticletext' ) == $this->textbox1 ) ) {
 442                                         $wgOut->redirect( $this->mTitle->getFullURL() );
 443                                         return false;
 444                                 }
 445                         if (wfRunHooks('ArticleSave', array(&$this->mArticle, &$wgUser, &$this->textbox1,
 446                                 &$this->summary, &$this->minoredit, &$this->watchthis, NULL)))
 447                         {
 448
 449                                 $isComment=($this->section=='new');
 450                                 $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 451                                         $this->minoredit, $this->watchthis, false, $isComment);
 452                                 wfRunHooks('ArticleSaveComplete', array(&$this->mArticle, &$wgUser, $this->textbox1,
 453                                         $this->summary, $this->minoredit,
 454                                         $this->watchthis, NULL));
 455                         }
 456                         return false;
 457                 }
 458
 459                 # Article exists. Check for edit conflict.
 460
 461                 $this->mArticle->clear(); # Force reload of dates, etc.
 462                 $this->mArticle->forUpdate( true ); # Lock the article
 463
 464                 if( ( $this->section != 'new' ) &&
 465                         ($this->mArticle->getTimestamp() != $this->edittime ) )
 466                 {
 467                         $this->isConflict = true;
 468                 }
 469                 $userid = $wgUser->getID();
 470
 471                 if ( $this->isConflict) {
 472                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 473                                 $this->mArticle->getTimestamp() . "'\n" );
 474                         $text = $this->mArticle->getTextOfLastEditWithSectionReplacedOrAdded(
 475                                 $this->section, $this->textbox1, $this->summary, $this->edittime);
 476                 }
 477                 else {
 478                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 479                         $text = $this->mArticle->getTextOfLastEditWithSectionReplacedOrAdded(
 480                                 $this->section, $this->textbox1, $this->summary);
 481                 }
 482
 483                 # Suppress edit conflict with self
 484                 if ( ( 0 != $userid ) && ( $this->mArticle->getUser() == $userid ) ) {
 485                         wfDebug( "Suppressing edit conflict, same user.\n" );
 486                         $this->isConflict = false;
 487                 } else {
 488                         # switch from section editing to normal editing in edit conflict
 489                         if($this->isConflict) {
 490                                 # Attempt merge
 491                                 if( $this->mergeChangesInto( $text ) ){
 492                                         // Successful merge! Maybe we should tell the user the good news?
 493                                         $this->isConflict = false;
 494                                         wfDebug( "Suppressing edit conflict, successful merge.\n" );
 495                                 } else {
 496                                         $this->section = '';
 497                                         $this->textbox1 = $text;
 498                                         wfDebug( "Keeping edit conflict, failed merge.\n" );
 499                                 }
 500                         }
 501                 }
 502
 503                 if ( $this->isConflict ) {
 504                         return true;
 505                 }
 506
 507                 # All's well
 508                 $sectionanchor = '';
 509                 if( $this->section == 'new' ) {
 510                         if( $this->summary != '' ) {
 511                                 $sectionanchor = $this->sectionAnchor( $this->summary );
 512                         }
 513                 } elseif( $this->section != '' ) {
 514                         # Try to get a section anchor from the section source, redirect to edited section if header found
 515                         # XXX: might be better to integrate this into Article::getTextOfLastEditWithSectionReplacedOrAdded
 516                         # for duplicate heading checking and maybe parsing
 517                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
 518                         # we can't deal with anchors, includes, html etc in the header for now,
 519                         # headline would need to be parsed to improve this
 520                         if($hasmatch and strlen($matches[2]) > 0) {
 521                                 $sectionanchor = $this->sectionAnchor( $matches[2] );
 522                         }
 523                 }
 524
 525                 // Save errors may fall down to the edit form, but we've now
 526                 // merged the section into full text. Clear the section field
 527                 // so that later submission of conflict forms won't try to
 528                 // replace that into a duplicated mess.
 529                 $this->textbox1 = $text;
 530                 $this->section = '';
 531
 532                 if (wfRunHooks('ArticleSave', array(&$this->mArticle, &$wgUser, &$text,
 533                         &$this->summary, &$this->minoredit,
 534                         &$this->watchthis, &$sectionanchor)))
 535                 {
 536                         # update the article here
 537                         if($this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
 538                                 $this->watchthis, '', $sectionanchor ))
 539                         {
 540                                 wfRunHooks('ArticleSaveComplete',
 541                                         array(&$this->mArticle, &$wgUser, $text,
 542                                         $this->summary, $this->minoredit,
 543                                         $this->watchthis, $sectionanchor));
 544                                 return false;
 545                         } else {
 546                                 $this->isConflict = true;
 547                         }
 548                 }
 549                 return true;
 550         }
 551
 552         /**
 553          * Initialise form fields in the object
 554          * Called on the first invocation, e.g. when a user clicks an edit link
 555          */
 556         function initialiseForm() {
 557                 $this->edittime = $this->mArticle->getTimestamp();
 558                 $this->textbox1 = $this->mArticle->getContent( true );
 559                 $this->summary = '';
 560                 $this->proxyCheck();
 561         }
 562
 563         /**
 564          * Send the edit form and related headers to $wgOut
 565          */
 566         function showEditForm() {
 567                 global $wgOut, $wgUser, $wgAllowAnonymousMinor, $wgLang, $wgContLang;
 568
 569                 $sk =& $wgUser->getSkin();
 570
 571                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 572
 573                 # Enabled article-related sidebar, toplinks, etc.
 574                 $wgOut->setArticleRelated( true );
 575
 576                 if ( $this->isConflict ) {
 577                         $s = wfMsg( 'editconflict', $this->mTitle->getPrefixedText() );
 578                         $wgOut->setPageTitle( $s );
 579                         $wgOut->addWikiText( wfMsg( 'explainconflict' ) );
 580
 581                         $this->textbox2 = $this->textbox1;
 582                         $this->textbox1 = $this->mArticle->getContent( true );
 583                         $this->edittime = $this->mArticle->getTimestamp();
 584                 } else {
 585
 586                         if( $this->section != '' ) {
 587                                 if( $this->section == 'new' ) {
 588                                         $s = wfMsg('editingcomment', $this->mTitle->getPrefixedText() );
 589                                 } else {
 590                                         $s = wfMsg('editingsection', $this->mTitle->getPrefixedText() );
 591                                         if( !$this->preview && !$this->diff ) {
 592                                                 preg_match( "/^(=+)(.+)\\1/mi",
 593                                                         $this->textbox1,
 594                                                         $matches );
 595                                                 if( !empty( $matches[2] ) ) {
 596                                                         $this->summary = "/* ". trim($matches[2])." */ ";
 597                                                 }
 598                                         }
 599                                 }
 600                         } else {
 601                                 $s = wfMsg( 'editing', $this->mTitle->getPrefixedText() );
 602                         }
 603                         $wgOut->setPageTitle( $s );
 604                         if ( !$this->checkUnicodeCompliantBrowser() ) {
 605                                 $this->mArticle->setOldSubtitle();
 606                                 $wgOut->addWikiText( wfMsg( 'nonunicodebrowser') );
 607                         }
 608                         if ( isset( $this->mArticle )
 609                              && isset( $this->mArticle->mRevision )
 610                              && !$this->mArticle->mRevision->isCurrent() ) {
 611                                 $this->mArticle->setOldSubtitle();
 612                                 $wgOut->addWikiText( wfMsg( 'editingold' ) );
 613                         }
 614                 }
 615
 616                 if( wfReadOnly() ) {
 617                         $wgOut->addWikiText( wfMsg( 'readonlywarning' ) );
 618                 } else if ( $this->isCssJsSubpage and 'preview' != $this->formtype) {
 619                         $wgOut->addWikiText( wfMsg( 'usercssjsyoucanpreview' ));
 620                 }
 621                 if( $this->mTitle->isProtected('edit') ) {
 622                         $wgOut->addWikiText( wfMsg( 'protectedpagewarning' ) );
 623                 }
 624
 625                 $kblength = (int)(strlen( $this->textbox1 ) / 1024);
 626                 if( $kblength > 29 ) {
 627                         $wgOut->addWikiText( wfMsg( 'longpagewarning', $wgLang->formatNum( $kblength ) ) );
 628                 }
 629
 630                 $rows = $wgUser->getOption( 'rows' );
 631                 $cols = $wgUser->getOption( 'cols' );
 632
 633                 $ew = $wgUser->getOption( 'editwidth' );
 634                 if ( $ew ) $ew = " style=\"width:100%\"";
 635                 else $ew = '';
 636
 637                 $q = 'action=submit';
 638                 #if ( "no" == $redirect ) { $q .= "&redirect=no"; }
 639                 $action = $this->mTitle->escapeLocalURL( $q );
 640
 641                 $summary = wfMsg('summary');
 642                 $subject = wfMsg('subject');
 643                 $minor   = wfMsg('minoredit');
 644                 $watchthis = wfMsg ('watchthis');
 645                 $save = wfMsg('savearticle');
 646                 $prev = wfMsg('showpreview');
 647                 $diff = wfMsg('showdiff');
 648
 649                 $cancel = $sk->makeKnownLink( $this->mTitle->getPrefixedText(),
 650                                 wfMsg('cancel') );
 651                 $edithelpurl = $sk->makeInternalOrExternalUrl( wfMsg( 'edithelppage' ));
 652                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
 653                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
 654                         htmlspecialchars( wfMsg( 'newwindow' ) );
 655
 656                 global $wgRightsText;
 657                 $copywarn = "<div id=\"editpage-copywarn\">\n" .
 658                         wfMsg( $wgRightsText ? 'copyrightwarning' : 'copyrightwarning2',
 659                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
 660                                 $wgRightsText ) . "\n</div>";
 661
 662                 if( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
 663                         # prepare toolbar for edit buttons
 664                         $toolbar = $this->getEditToolbar();
 665                 } else {
 666                         $toolbar = '';
 667                 }
 668
 669                 // activate checkboxes if user wants them to be always active
 670                 if( !$this->preview && !$this->diff ) {
 671                         if( $wgUser->getOption( 'watchdefault' ) ) $this->watchthis = true;
 672                         if( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
 673
 674                         // activate checkbox also if user is already watching the page,
 675                         // require wpWatchthis to be unset so that second condition is not
 676                         // checked unnecessarily
 677                         if( !$this->watchthis && $this->mTitle->userIsWatching() ) $this->watchthis = true;
 678                 }
 679
 680                 $minoredithtml = '';
 681
 682                 if ( $wgUser->isLoggedIn() || $wgAllowAnonymousMinor ) {
 683                         $minoredithtml =
 684                                 "<input tabindex='3' type='checkbox' value='1' name='wpMinoredit'".($this->minoredit?" checked='checked'":"").
 685                                 " accesskey='".wfMsg('accesskey-minoredit')."' id='wpMinoredit' />".
 686                                 "<label for='wpMinoredit' title='".wfMsg('tooltip-minoredit')."'>{$minor}</label>";
 687                 }
 688
 689                 $watchhtml = '';
 690
 691                 if ( $wgUser->isLoggedIn() ) {
 692                         $watchhtml = "<input tabindex='4' type='checkbox' name='wpWatchthis'".
 693                                 ($this->watchthis?" checked='checked'":"").
 694                                 " accesskey=\"".htmlspecialchars(wfMsg('accesskey-watch'))."\" id='wpWatchthis'  />".
 695                                 "<label for='wpWatchthis' title=\"" .
 696                                         htmlspecialchars(wfMsg('tooltip-watch'))."\">{$watchthis}</label>";
 697                 }
 698
 699                 $checkboxhtml = $minoredithtml . $watchhtml . '<br />';
 700
 701                 $wgOut->addHTML( '<div id="wikiPreview">' );
 702                 if ( 'preview' == $this->formtype) {
 703                         $previewOutput = $this->getPreviewText();
 704                         if ( $wgUser->getOption('previewontop' ) ) {
 705                                 $wgOut->addHTML( $previewOutput );
 706                                 if($this->mTitle->getNamespace() == NS_CATEGORY) {
 707                                         $this->mArticle->closeShowCategory();
 708                                 }
 709                                 $wgOut->addHTML( "<br style=\"clear:both;\" />\n" );
 710                         }
 711                 }
 712                 $wgOut->addHTML( '</div>' );
 713                 if ( 'diff' == $this->formtype ) {
 714                         if ( $wgUser->getOption('previewontop' ) ) {
 715                                 $wgOut->addHTML( $this->getDiff() );
 716                         }
 717                 }
 718
 719
 720                 # if this is a comment, show a subject line at the top, which is also the edit summary.
 721                 # Otherwise, show a summary field at the bottom
 722                 $summarytext = htmlspecialchars( $wgContLang->recodeForEdit( $this->summary ) ); # FIXME
 723                 if( $this->section == 'new' ) {
 724                         $commentsubject="{$subject}: <input tabindex='1' type='text' value=\"$summarytext\" name=\"wpSummary\" maxlength='200' size='60' /><br />";
 725                         $editsummary = '';
 726                 } else {
 727                         $commentsubject = '';
 728                         $editsummary="{$summary}: <input tabindex='2' type='text' value=\"$summarytext\" name=\"wpSummary\" maxlength='200' size='60' /><br />";
 729                 }
 730
 731                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
 732                 if( !$this->preview && !$this->diff ) {
 733                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
 734                 }
 735                 $templates = $this->getTemplatesUsed();
 736
 737                 global $wgLivePreview;
 738                 if ( $wgLivePreview ) {
 739                         $liveOnclick = $this->doLivePreviewScript();
 740                 } else {
 741                         $liveOnclick = '';
 742                 }
 743
 744                 global $wgUseMetadataEdit ;
 745                 if ( $wgUseMetadataEdit ) {
 746                         $metadata = $this->mMetaData ;
 747                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
 748                         $helppage = Title::newFromText( wfMsg( "metadata_page" ) ) ;
 749                         $top = wfMsg( 'metadata', $helppage->getInternalURL() );
 750                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
 751                 }
 752                 else $metadata = "" ;
 753
 754                 $hidden = '';
 755                 $recreate = '';
 756                 if ($this->deletedSinceEdit) {
 757                         if ( 'save' != $this->formtype ) {
 758                                 $wgOut->addWikiText( wfMsg('deletedwhileediting'));
 759                         } else {
 760                                 // Hide the toolbar and edit area, use can click preview to get it back
 761                                 // Add an confirmation checkbox and explanation.
 762                                 $toolbar = '';
 763                                 $hidden = 'type="hidden" style="display:none;"';
 764                                 $recreate = $wgOut->parse( wfMsg( 'confirmrecreate',  $query->user_name , $query->log_comment ));
 765                                 $recreate .=
 766                                         "<br /><input tabindex='1' type='checkbox' value='1' name='wpRecreate' id='wpRecreate' />".
 767                                         "<label for='wpRecreate' title='".wfMsg('tooltip-recreate')."'>". wfMsg('recreate')."</label>";
 768                         }
 769                 }
 770
 771                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
 772                         ? ""
 773                         : "<input type='hidden' name=\"safemode\" value='1' />\n";
 774
 775                 $wgOut->addHTML( <<<END
 776 {$toolbar}
 777 <form id="editform" name="editform" method="post" action="$action"
 778 enctype="multipart/form-data">
 779 $recreate
 780 {$commentsubject}
 781 <textarea tabindex='1' accesskey="," name="wpTextbox1" rows='{$rows}'
 782 cols='{$cols}'{$ew} $hidden>
 783 END
 784 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox1 ) ) .
 785 "
 786 </textarea>
 787 {$metadata}
 788 <br />{$editsummary}
 789 {$checkboxhtml}
 790 {$safemodehtml}
 791 <input tabindex='5' id='wpSave' type='submit' value=\"{$save}\" name=\"wpSave\" accesskey=\"".wfMsg('accesskey-save')."\"".
 792 " title=\"".wfMsg('tooltip-save')."\"/>
 793 <input tabindex='6' id='wpPreview' type='submit' $liveOnclick value=\"{$prev}\" name=\"wpPreview\" accesskey=\"".wfMsg('accesskey-preview')."\"".
 794 " title=\"".wfMsg('tooltip-preview')."\"/>
 795 <input tabindex='7' id='wpDiff' type='submit' value=\"{$diff}\" name=\"wpDiff\" accesskey=\"".wfMsg('accesskey-diff')."\"".
 796 " title=\"".wfMsg('tooltip-diff')."\"/>
 797 <em>{$cancel}</em> | <em>{$edithelp}</em>{$templates}" );
 798                 $wgOut->addWikiText( $copywarn );
 799                 $wgOut->addHTML( "
 800 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
 801 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
 802 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n" );
 803
 804                 if ( $wgUser->isLoggedIn() ) {
 805                         /**
 806                          * To make it harder for someone to slip a user a page
 807                          * which submits an edit form to the wiki without their
 808                          * knowledge, a random token is associated with the login
 809                          * session. If it's not passed back with the submission,
 810                          * we won't save the page, or render user JavaScript and
 811                          * CSS previews.
 812                          */
 813                         $token = htmlspecialchars( $wgUser->editToken() );
 814                         $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
 815                 }
 816
 817
 818                 if ( $this->isConflict ) {
 819                         require_once( "DifferenceEngine.php" );
 820                         $wgOut->addWikiText( '==' . wfMsg( "yourdiff" ) . '==' );
 821                         DifferenceEngine::showDiff( $this->textbox2, $this->textbox1,
 822                           wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
 823
 824                         $wgOut->addWikiText( '==' . wfMsg( "yourtext" ) . '==' );
 825                         $wgOut->addHTML( "<textarea tabindex=6 id='wpTextbox2' name=\"wpTextbox2\" rows='{$rows}' cols='{$cols}' wrap='virtual'>"
 826                                 . htmlspecialchars( $this->safeUnicodeOutput( $this->textbox2 ) ) . "\n</textarea>" );
 827                 }
 828                 $wgOut->addHTML( "</form>\n" );
 829                 if ( $this->formtype == 'preview' && !$wgUser->getOption( 'previewontop' ) ) {
 830                         $wgOut->addHTML( '<div id="wikiPreview">' . $previewOutput . '</div>' );
 831                 }
 832                 if ( $this->formtype == 'diff' && !$wgUser->getOption( 'previewontop' ) ) {
 833                         #$wgOut->addHTML( '<div id="wikiPreview">' . $difftext . '</div>' );
 834                         $wgOut->addHTML( $this->getDiff() );
 835                 }
 836         }
 837
 838         /**
 839          * Prepare a list of templates used by this page. Returns HTML.
 840          */
 841         function getTemplatesUsed() {
 842                 global $wgUser;
 843                 $sk =& $wgUser->getSkin();
 844
 845                 $templates = '';
 846                 $articleTemplates = $this->mArticle->getUsedTemplates();
 847                 if ( count( $articleTemplates ) > 0 ) {
 848                         $templates = '<br />'. wfMsg( 'templatesused' ) . '<ul>';
 849                         foreach ( $articleTemplates as $tpl ) {
 850                                 if ( $titleObj = Title::makeTitle( NS_TEMPLATE, $tpl ) ) {
 851                                         $templates .= '<li>' . $sk->makeLinkObj( $titleObj ) . '</li>';
 852                                 }
 853                         }
 854                         $templates .= '</ul>';
 855                 }
 856                 return $templates;
 857         }
 858
 859         /**
 860          * Live Preview lets us fetch rendered preview page content and
 861          * add it to the page without refreshing the whole page.
 862          * If not supported by the browser it will fall through to the normal form
 863          * submission method.
 864          *
 865          * This function outputs a script tag to support live preview, and
 866          * returns an onclick handler which should be added to the attributes
 867          * of the preview button
 868          */
 869         function doLivePreviewScript() {
 870                 global $wgStylePath, $wgJsMimeType, $wgOut;
 871                 $wgOut->addHTML( '<script type="'.$wgJsMimeType.'" src="' .
 872                         htmlspecialchars( $wgStylePath . '/common/preview.js' ) .
 873                         '"></script>' . "\n" );
 874                 $liveAction = $wgTitle->getLocalUrl( 'action=submit&wpPreview=true&live=true' );
 875                 return 'onclick="return !livePreview('.
 876                         'getElementById(\'wikiPreview\'),' .
 877                         'editform.wpTextbox1.value,' .
 878                         htmlspecialchars( '"' . $liveAction . '"' ) . ')"';
 879         }
 880
 881         function getLastDelete() {
 882                 $dbr =& wfGetDB( DB_SLAVE );
 883                 $fname = 'EditPage::getLastDelete';
 884                 $res = $dbr->select(
 885                         array( 'logging', 'user' ),
 886                         array( 'log_type',
 887                                'log_action',
 888                                'log_timestamp',
 889                                'log_user',
 890                                'log_namespace',
 891                                'log_title',
 892                                'log_comment',
 893                                'log_params',
 894                                'user_name', ),
 895                         array( 'log_namespace="' . $this->mTitle->getNamespace() . '"',
 896                                'log_title="' . $this->mTitle->getDBkey() . '"',
 897                                'log_type="delete"',
 898                                'log_action="delete"',
 899                                'user_id=log_user' ),
 900                         $fname,
 901                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' ) );
 902
 903                 if($dbr->numRows($res) == 1) {
 904                         while ( $x = $dbr->fetchObject ( $res ) )
 905                                 $data = $x;
 906                         $dbr->freeResult ( $res ) ;
 907                 } else {
 908                         $data = null;
 909                 }
 910                 return $data;
 911         }
 912
 913         /**
 914          * @todo document
 915          */
 916         function getPreviewText() {
 917                 global $wgOut, $wgUser, $wgTitle, $wgParser, $wgAllowDiffPreview, $wgEnableDiffPreviewPreference;
 918                 $previewhead = '<h2>' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>\n" .
 919                         "<p class='previewnote'>" . htmlspecialchars( wfMsg( 'previewnote' ) ) . "</p>\n";
 920                 if ( $this->isConflict ) {
 921                         $previewhead.='<h2>' . htmlspecialchars( wfMsg( 'previewconflict' ) ) .
 922                                 "</h2>\n";
 923                 }
 924
 925                 $parserOptions = ParserOptions::newFromUser( $wgUser );
 926                 $parserOptions->setEditSection( false );
 927
 928                 # don't parse user css/js, show message about preview
 929                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
 930
 931                 if ( $this->isCssJsSubpage ) {
 932                         if(preg_match("/\\.css$/", $wgTitle->getText() ) ) {
 933                                 $previewtext = wfMsg('usercsspreview');
 934                         } else if(preg_match("/\\.js$/", $wgTitle->getText() ) ) {
 935                                 $previewtext = wfMsg('userjspreview');
 936                         }
 937                         $parserOutput = $wgParser->parse( $previewtext , $wgTitle, $parserOptions );
 938                         $wgOut->addHTML( $parserOutput->mText );
 939                         return $previewhead;
 940                 } else {
 941                         # if user want to see preview when he edit an article
 942                         if( $wgUser->getOption('previewonfirst') and ($this->textbox1 == '')) {
 943                                 $this->textbox1 = $this->mArticle->getContent(true);
 944                         }
 945
 946                         $toparse = $this->textbox1;
 947
 948                         # If we're adding a comment, we need to show the
 949                         # summary as the headline
 950                         if($this->section=="new" && $this->summary!="") {
 951                                 $toparse="== {$this->summary} ==\n\n".$toparse;
 952                         }
 953
 954                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData ;
 955
 956                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ) ."\n\n",
 957                                         $wgTitle, $parserOptions );
 958
 959                         $previewHTML = $parserOutput->mText;
 960
 961                         $wgOut->addCategoryLinks($parserOutput->getCategoryLinks());
 962                         $wgOut->addLanguageLinks($parserOutput->getLanguageLinks());
 963                         return $previewhead . $previewHTML;
 964                 }
 965         }
 966
 967         /**
 968          * @todo document
 969          */
 970         function blockedIPpage() {
 971                 global $wgOut, $wgUser, $wgContLang, $wgIP;
 972
 973                 $wgOut->setPageTitle( wfMsg( 'blockedtitle' ) );
 974                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 975                 $wgOut->setArticleRelated( false );
 976
 977                 $id = $wgUser->blockedBy();
 978                 $reason = $wgUser->blockedFor();
 979                 $ip = $wgIP;
 980
 981                 if ( is_numeric( $id ) ) {
 982                         $name = User::whoIs( $id );
 983                 } else {
 984                         $name = $id;
 985                 }
 986                 $link = '[[' . $wgContLang->getNsText( NS_USER ) .
 987                   ":{$name}|{$name}]]";
 988
 989                 $wgOut->addWikiText( wfMsg( 'blockedtext', $link, $reason, $ip, $name ) );
 990                 $wgOut->returnToMain( false );
 991         }
 992
 993         /**
 994          * @todo document
 995          */
 996         function userNotLoggedInPage() {
 997                 global $wgOut;
 998
 999                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1000                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1001                 $wgOut->setArticleRelated( false );
1002
1003                 $wgOut->addWikiText( wfMsg( 'whitelistedittext' ) );
1004                 $wgOut->returnToMain( false );
1005         }
1006
1007         /**
1008          * @todo document
1009          */
1010         function spamPage ( $match = false )
1011         {
1012                 global $wgOut;
1013                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1014                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1015                 $wgOut->setArticleRelated( false );
1016
1017                 $wgOut->addWikiText( wfMsg( 'spamprotectiontext' ) );
1018                 if ( $match ) {
1019                         $wgOut->addWikiText( wfMsg( 'spamprotectionmatch', "<nowiki>{$match}</nowiki>" ) );
1020                 }
1021                 $wgOut->returnToMain( false );
1022         }
1023
1024         /**
1025          * Forks processes to scan the originating IP for an open proxy server
1026          * MemCached can be used to skip IPs that have already been scanned
1027          */
1028         function proxyCheck() {
1029                 global $wgBlockOpenProxies, $wgProxyPorts, $wgProxyScriptPath;
1030                 global $wgIP, $wgUseMemCached, $wgMemc, $wgDBname, $wgProxyMemcExpiry;
1031
1032                 if ( !$wgBlockOpenProxies ) {
1033                         return;
1034                 }
1035
1036                 # Get MemCached key
1037                 $skip = false;
1038                 if ( $wgUseMemCached ) {
1039                         $mcKey = $wgDBname.':proxy:ip:'.$wgIP;
1040                         $mcValue = $wgMemc->get( $mcKey );
1041                         if ( $mcValue ) {
1042                                 $skip = true;
1043                         }
1044                 }
1045
1046                 # Fork the processes
1047                 if ( !$skip ) {
1048                         $title = Title::makeTitle( NS_SPECIAL, 'Blockme' );
1049                         $iphash = md5( $wgIP . $wgProxyKey );
1050                         $url = $title->getFullURL( 'ip='.$iphash );
1051
1052                         foreach ( $wgProxyPorts as $port ) {
1053                                 $params = implode( ' ', array(
1054                                                         escapeshellarg( $wgProxyScriptPath ),
1055                                                         escapeshellarg( $wgIP ),
1056                                                         escapeshellarg( $port ),
1057                                                         escapeshellarg( $url )
1058                                                         ));
1059                                 exec( "php $params &>/dev/null &" );
1060                         }
1061                         # Set MemCached key
1062                         if ( $wgUseMemCached ) {
1063                                 $wgMemc->set( $mcKey, 1, $wgProxyMemcExpiry );
1064                         }
1065                 }
1066         }
1067
1068         /**
1069          * @access private
1070          * @todo document
1071          */
1072         function mergeChangesInto( &$editText ){
1073                 $fname = 'EditPage::mergeChangesInto';
1074                 wfProfileIn( $fname );
1075
1076                 $db =& wfGetDB( DB_MASTER );
1077
1078                 // This is the revision the editor started from
1079                 $baseRevision = Revision::loadFromTimestamp(
1080                         $db, $this->mArticle->mTitle, $this->edittime );
1081                 if( is_null( $baseRevision ) ) {
1082                         wfProfileOut( $fname );
1083                         return false;
1084                 }
1085                 $baseText = $baseRevision->getText();
1086
1087                 // The current state, we want to merge updates into it
1088                 $currentRevision =  Revision::loadFromTitle(
1089                         $db, $this->mArticle->mTitle );
1090                 if( is_null( $currentRevision ) ) {
1091                         wfProfileOut( $fname );
1092                         return false;
1093                 }
1094                 $currentText = $currentRevision->getText();
1095
1096                 if( wfMerge( $baseText, $editText, $currentText, $result ) ){
1097                         $editText = $result;
1098                         wfProfileOut( $fname );
1099                         return true;
1100                 } else {
1101                         wfProfileOut( $fname );
1102                         return false;
1103                 }
1104         }
1105
1106
1107         function checkUnicodeCompliantBrowser() {
1108                 global $wgBrowserBlackList;
1109                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
1110                 foreach ( $wgBrowserBlackList as $browser ) {
1111                         if ( preg_match($browser, $currentbrowser) ) {
1112                                 return false;
1113                         }
1114                 }
1115                 return true;
1116         }
1117
1118         /**
1119          * Format an anchor fragment as it would appear for a given section name
1120          * @param string $text
1121          * @return string
1122          * @access private
1123          */
1124         function sectionAnchor( $text ) {
1125                 $headline = Sanitizer::decodeCharReferences( $text );
1126                 # strip out HTML
1127                 $headline = preg_replace( '/<.*?' . '>/', '', $headline );
1128                 $headline = trim( $headline );
1129                 $sectionanchor = '#' . urlencode( str_replace( ' ', '_', $headline ) );
1130                 $replacearray = array(
1131                         '%3A' => ':',
1132                         '%' => '.'
1133                 );
1134                 return str_replace(
1135                         array_keys( $replacearray ),
1136                         array_values( $replacearray ),
1137                         $sectionanchor );
1138         }
1139
1140         /**
1141          * Shows a bulletin board style toolbar for common editing functions.
1142          * It can be disabled in the user preferences.
1143          * The necessary JavaScript code can be found in style/wikibits.js.
1144          */
1145         function getEditToolbar() {
1146                 global $wgStylePath, $wgLang, $wgMimeType, $wgJsMimeType;
1147
1148                 /**
1149                  * toolarray an array of arrays which each include the filename of
1150                  * the button image (without path), the opening tag, the closing tag,
1151                  * and optionally a sample text that is inserted between the two when no
1152                  * selection is highlighted.
1153                  * The tip text is shown when the user moves the mouse over the button.
1154                  *
1155                  * Already here are accesskeys (key), which are not used yet until someone
1156                  * can figure out a way to make them work in IE. However, we should make
1157                  * sure these keys are not defined on the edit page.
1158                  */
1159                 $toolarray=array(
1160                         array(  'image'=>'button_bold.png',
1161                                         'open'  =>      "\'\'\'",
1162                                         'close' =>      "\'\'\'",
1163                                         'sample'=>      wfMsg('bold_sample'),
1164                                         'tip'   =>      wfMsg('bold_tip'),
1165                                         'key'   =>      'B'
1166                                 ),
1167                         array(  'image'=>'button_italic.png',
1168                                         'open'  =>      "\'\'",
1169                                         'close' =>      "\'\'",
1170                                         'sample'=>      wfMsg('italic_sample'),
1171                                         'tip'   =>      wfMsg('italic_tip'),
1172                                         'key'   =>      'I'
1173                                 ),
1174                         array(  'image'=>'button_link.png',
1175                                         'open'  =>      '[[',
1176                                         'close' =>      ']]',
1177                                         'sample'=>      wfMsg('link_sample'),
1178                                         'tip'   =>      wfMsg('link_tip'),
1179                                         'key'   =>      'L'
1180                                 ),
1181                         array(  'image'=>'button_extlink.png',
1182                                         'open'  =>      '[',
1183                                         'close' =>      ']',
1184                                         'sample'=>      wfMsg('extlink_sample'),
1185                                         'tip'   =>      wfMsg('extlink_tip'),
1186                                         'key'   =>      'X'
1187                                 ),
1188                         array(  'image'=>'button_headline.png',
1189                                         'open'  =>      "\\n== ",
1190                                         'close' =>      " ==\\n",
1191                                         'sample'=>      wfMsg('headline_sample'),
1192                                         'tip'   =>      wfMsg('headline_tip'),
1193                                         'key'   =>      'H'
1194                                 ),
1195                         array(  'image'=>'button_image.png',
1196                                         'open'  =>      '[['.$wgLang->getNsText(NS_IMAGE).":",
1197                                         'close' =>      ']]',
1198                                         'sample'=>      wfMsg('image_sample'),
1199                                         'tip'   =>      wfMsg('image_tip'),
1200                                         'key'   =>      'D'
1201                                 ),
1202                         array(  'image' =>'button_media.png',
1203                                         'open'  =>      '[['.$wgLang->getNsText(NS_MEDIA).':',
1204                                         'close' =>      ']]',
1205                                         'sample'=>      wfMsg('media_sample'),
1206                                         'tip'   =>      wfMsg('media_tip'),
1207                                         'key'   =>      'M'
1208                                 ),
1209                         array(  'image' =>'button_math.png',
1210                                         'open'  =>      "\\<math\\>",
1211                                         'close' =>      "\\</math\\>",
1212                                         'sample'=>      wfMsg('math_sample'),
1213                                         'tip'   =>      wfMsg('math_tip'),
1214                                         'key'   =>      'C'
1215                                 ),
1216                         array(  'image' =>'button_nowiki.png',
1217                                         'open'  =>      "\\<nowiki\\>",
1218                                         'close' =>      "\\</nowiki\\>",
1219                                         'sample'=>      wfMsg('nowiki_sample'),
1220                                         'tip'   =>      wfMsg('nowiki_tip'),
1221                                         'key'   =>      'N'
1222                                 ),
1223                         array(  'image' =>'button_sig.png',
1224                                         'open'  =>      '--~~~~',
1225                                         'close' =>      '',
1226                                         'sample'=>      '',
1227                                         'tip'   =>      wfMsg('sig_tip'),
1228                                         'key'   =>      'Y'
1229                                 ),
1230                         array(  'image' =>'button_hr.png',
1231                                         'open'  =>      "\\n----\\n",
1232                                         'close' =>      '',
1233                                         'sample'=>      '',
1234                                         'tip'   =>      wfMsg('hr_tip'),
1235                                         'key'   =>      'R'
1236                                 )
1237                 );
1238                 $toolbar ="<script type='$wgJsMimeType'>\n/*<![CDATA[*/\n";
1239
1240                 $toolbar.="document.writeln(\"<div id='toolbar'>\");\n";
1241                 foreach($toolarray as $tool) {
1242
1243                         $image=$wgStylePath.'/common/images/'.$tool['image'];
1244                         $open=$tool['open'];
1245                         $close=$tool['close'];
1246                         $sample = wfEscapeJsString( $tool['sample'] );
1247
1248                         // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
1249                         // Older browsers show a "speedtip" type message only for ALT.
1250                         // Ideally these should be different, realistically they
1251                         // probably don't need to be.
1252                         $tip = wfEscapeJsString( $tool['tip'] );
1253
1254                         #$key = $tool["key"];
1255
1256                         $toolbar.="addButton('$image','$tip','$open','$close','$sample');\n";
1257                 }
1258
1259                 $toolbar.="addInfobox('" . wfEscapeJsString( wfMsg( "infobox" ) ) .
1260                         "','" . wfEscapeJsString( wfMsg( "infobox_alert" ) ) . "');\n";
1261                 $toolbar.="document.writeln(\"</div>\");\n";
1262
1263                 $toolbar.="/*]]>*/\n</script>";
1264                 return $toolbar;
1265         }
1266
1267         /**
1268          * Output preview text only. This can be sucked into the edit page
1269          * via JavaScript, and saves the server time rendering the skin as
1270          * well as theoretically being more robust on the client (doesn't
1271          * disturb the edit box's undo history, won't eat your text on
1272          * failure, etc).
1273          *
1274          * @todo This doesn't include category or interlanguage links.
1275          *       Would need to enhance it a bit, maybe wrap them in XML
1276          *       or something... that might also require more skin
1277          *       initialization, so check whether that's a problem.
1278          */
1279         function livePreview() {
1280                 global $wgOut;
1281                 $wgOut->disable();
1282                 header( 'Content-type: text/xml' );
1283                 header( 'Cache-control: no-cache' );
1284                 # FIXME
1285                 echo $this->getPreviewText( false, false );
1286         }
1287
1288
1289         /**
1290          * Get a diff between the current contents of the edit box and the
1291          * version of the page we're editing from.
1292          *
1293          * If this is a section edit, we'll replace the section as for final
1294          * save and then make a comparison.
1295          *
1296          * @return string HTML
1297          */
1298         function getDiff() {
1299                 require_once( 'DifferenceEngine.php' );
1300                 $oldtext = $this->mArticle->fetchContent();
1301                 $newtext = $this->mArticle->getTextOfLastEditWithSectionReplacedOrAdded(
1302                         $this->section, $this->textbox1, $this->summary, $this->edittime );
1303                 $oldtitle = wfMsg( 'currentrev' );
1304                 $newtitle = wfMsg( 'yourtext' );
1305                 if ( $oldtext != wfMsg( 'noarticletext' ) || $newtext != '' ) {
1306                         $difftext = DifferenceEngine::getDiff( $oldtext, $newtext, $oldtitle, $newtitle );
1307                 }
1308
1309                 return '<div id="wikiDiff">' . $difftext . '</div>';
1310         }
1311
1312         /**
1313          * Filter an input field through a Unicode de-armoring process if it
1314          * came from an old browser with known broken Unicode editing issues.
1315          *
1316          * @param WebRequest $request
1317          * @param string $field
1318          * @return string
1319          * @access private
1320          */
1321         function safeUnicodeInput( $request, $field ) {
1322                 $text = rtrim( $request->getText( $field ) );
1323                 return $request->getBool( 'safemode' )
1324                         ? $this->unmakesafe( $text )
1325                         : $text;
1326         }
1327
1328         /**
1329          * Filter an output field through a Unicode armoring process if it is
1330          * going to an old browser with known broken Unicode editing issues.
1331          *
1332          * @param string $text
1333          * @return string
1334          * @access private
1335          */
1336         function safeUnicodeOutput( $text ) {
1337                 global $wgContLang;
1338                 $codedText = $wgContLang->recodeForEdit( $text );
1339                 return $this->checkUnicodeCompliantBrowser()
1340                         ? $codedText
1341                         : $this->makesafe( $codedText );
1342         }
1343
1344         /**
1345          * A number of web browsers are known to corrupt non-ASCII characters
1346          * in a UTF-8 text editing environment. To protect against this,
1347          * detected browsers will be served an armored version of the text,
1348          * with non-ASCII chars converted to numeric HTML character references.
1349          *
1350          * Preexisting such character references will have a 0 added to them
1351          * to ensure that round-trips do not alter the original data.
1352          *
1353          * @param string $invalue
1354          * @return string
1355          * @access private
1356          */
1357         function makesafe( $invalue ) {
1358                 // Armor existing references for reversability.
1359                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
1360
1361                 $bytesleft = 0;
1362                 $result = "";
1363                 $working = 0;
1364                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1365                         $bytevalue = ord( $invalue{$i} );
1366                         if( $bytevalue <= 0x7F ) { //0xxx xxxx
1367                                 $result .= chr( $bytevalue );
1368                                 $bytesleft = 0;
1369                         } elseif( $bytevalue <= 0xBF ) { //10xx xxxx
1370                                 $working = $working << 6;
1371                                 $working += ($bytevalue & 0x3F);
1372                                 $bytesleft--;
1373                                 if( $bytesleft <= 0 ) {
1374                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
1375                                 }
1376                         } elseif( $bytevalue <= 0xDF ) { //110x xxxx
1377                                 $working = $bytevalue & 0x1F;
1378                                 $bytesleft = 1;
1379                         } elseif( $bytevalue <= 0xEF ) { //1110 xxxx
1380                                 $working = $bytevalue & 0x0F;
1381                                 $bytesleft = 2;
1382                         } else { //1111 0xxx
1383                                 $working = $bytevalue & 0x07;
1384                                 $bytesleft = 3;
1385                         }
1386                 }
1387                 return $result;
1388         }
1389
1390         /**
1391          * Reverse the previously applied transliteration of non-ASCII characters
1392          * back to UTF-8. Used to protect data from corruption by broken web browsers
1393          * as listed in $wgBrowserBlackList.
1394          *
1395          * @param string $invalue
1396          * @return string
1397          * @access private
1398          */
1399         function unmakesafe( $invalue ) {
1400                 $result = "";
1401                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
1402                         if( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
1403                                 $i += 3;
1404                                 $hexstring = "";
1405                                 do {
1406                                         $hexstring .= $invalue{$i};
1407                                         $i++;
1408                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
1409
1410                                 // Do some sanity checks. These aren't needed for reversability,
1411                                 // but should help keep the breakage down if the editor
1412                                 // breaks one of the entities whilst editing.
1413                                 if ((substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6)) {
1414                                         $codepoint = hexdec($hexstring);
1415                                         $result .= codepointToUtf8( $codepoint );
1416                                 } else {
1417                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
1418                                 }
1419                         } else {
1420                                 $result .= substr( $invalue, $i, 1 );
1421                         }
1422                 }
1423                 // reverse the transform that we made for reversability reasons.
1424                 return strtr( $result, array( "&#x0" => "&#x" ) );
1425         }
1426
1427
1428 }
1429
1430 ?>