includes/EditPage.php

   1 <?php
   2 /**
   3  * Contains the EditPage class
   4  * @file
   5  */
   6
   7 /**
   8  * The edit page/HTML interface (split 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  * EditPage cares about two distinct titles:
  14  * $wgTitle is the page that forms submit to, links point to,
  15  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  16  * page in the database that is actually being edited. These are
  17  * usually the same, but they are now allowed to be different.
  18  */
  19 class EditPage {
  20         const AS_SUCCESS_UPDATE                 = 200;
  21         const AS_SUCCESS_NEW_ARTICLE            = 201;
  22         const AS_HOOK_ERROR                     = 210;
  23         const AS_FILTERING                      = 211;
  24         const AS_HOOK_ERROR_EXPECTED            = 212;
  25         const AS_BLOCKED_PAGE_FOR_USER          = 215;
  26         const AS_CONTENT_TOO_BIG                = 216;
  27         const AS_USER_CANNOT_EDIT               = 217;
  28         const AS_READ_ONLY_PAGE_ANON            = 218;
  29         const AS_READ_ONLY_PAGE_LOGGED          = 219;
  30         const AS_READ_ONLY_PAGE                 = 220;
  31         const AS_RATE_LIMITED                   = 221;
  32         const AS_ARTICLE_WAS_DELETED            = 222;
  33         const AS_NO_CREATE_PERMISSION           = 223;
  34         const AS_BLANK_ARTICLE                  = 224;
  35         const AS_CONFLICT_DETECTED              = 225;
  36         const AS_SUMMARY_NEEDED                 = 226;
  37         const AS_TEXTBOX_EMPTY                  = 228;
  38         const AS_MAX_ARTICLE_SIZE_EXCEEDED      = 229;
  39         const AS_OK                             = 230;
  40         const AS_END                            = 231;
  41         const AS_SPAM_ERROR                     = 232;
  42         const AS_IMAGE_REDIRECT_ANON            = 233;
  43         const AS_IMAGE_REDIRECT_LOGGED          = 234;
  44
  45         var $mArticle;
  46         var $mTitle;
  47         var $action;
  48         var $mMetaData = '';
  49         var $isConflict = false;
  50         var $isCssJsSubpage = false;
  51         var $isCssSubpage = false;
  52         var $isJsSubpage = false;
  53         var $deletedSinceEdit = false;
  54         var $formtype;
  55         var $firsttime;
  56         var $lastDelete;
  57         var $mTokenOk = false;
  58         var $mTokenOkExceptSuffix = false;
  59         var $mTriedSave = false;
  60         var $tooBig = false;
  61         var $kblength = false;
  62         var $missingComment = false;
  63         var $missingSummary = false;
  64         var $allowBlankSummary = false;
  65         var $autoSumm = '';
  66         var $hookError = '';
  67         #var $mPreviewTemplates;
  68         var $mParserOutput;
  69         var $mBaseRevision = false;
  70
  71         # Form values
  72         var $save = false, $preview = false, $diff = false;
  73         var $minoredit = false, $watchthis = false, $recreate = false;
  74         var $textbox1 = '', $textbox2 = '', $summary = '';
  75         var $edittime = '', $section = '', $starttime = '';
  76         var $oldid = 0, $editintro = '', $scrolltop = null;
  77
  78         # Placeholders for text injection by hooks (must be HTML)
  79         # extensions should take care to _append_ to the present value
  80         public $editFormPageTop; // Before even the preview
  81         public $editFormTextTop;
  82         public $editFormTextBeforeContent;
  83         public $editFormTextAfterWarn;
  84         public $editFormTextAfterTools;
  85         public $editFormTextBottom;
  86
  87         /* $didSave should be set to true whenever an article was succesfully altered. */
  88         public $didSave = false;
  89         public $undidRev = 0;
  90
  91         public $suppressIntro = false;
  92
  93         /**
  94          * @todo document
  95          * @param $article
  96          */
  97         function EditPage( $article ) {
  98                 $this->mArticle =& $article;
  99                 $this->mTitle = $article->getTitle();
 100                 $this->action = 'submit';
 101
 102                 # Placeholders for text injection by hooks (empty per default)
 103                 $this->editFormPageTop =
 104                 $this->editFormTextTop =
 105                 $this->editFormTextBeforeContent =
 106                 $this->editFormTextAfterWarn =
 107                 $this->editFormTextAfterTools =
 108                 $this->editFormTextBottom =
 109                 $this->mPreloadText = "";
 110         }
 111
 112         function getArticle() {
 113                 return $this->mArticle;
 114         }
 115
 116
 117         /**
 118          * Fetch initial editing page content.
 119          * @private
 120          */
 121         function getContent( $def_text = '' ) {
 122                 global $wgOut, $wgRequest, $wgParser, $wgContLang, $wgMessageCache;
 123
 124                 wfProfileIn( __METHOD__ );
 125                 # Get variables from query string :P
 126                 $section = $wgRequest->getVal( 'section' );
 127                 $preload = $wgRequest->getVal( 'preload' );
 128                 $undoafter = $wgRequest->getVal( 'undoafter' );
 129                 $undo = $wgRequest->getVal( 'undo' );
 130
 131                 $text = '';
 132                 // For message page not locally set, use the i18n message.
 133                 // For other non-existent articles, use preload text if any.
 134                 if ( !$this->mTitle->exists() ) {
 135                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 136                                 # If this is a system message, get the default text.
 137                                 list( $message, $lang ) = $wgMessageCache->figureMessage( $wgContLang->lcfirst( $this->mTitle->getText() ) );
 138                                 $wgMessageCache->loadAllMessages( $lang );
 139                                 $text = wfMsgGetKey( $message, false, $lang, false );
 140                                 if( wfEmptyMsg( $message, $text ) )
 141                                         $text = $this->getPreloadedText( $preload );
 142                         } else {
 143                                 # If requested, preload some text.
 144                                 $text = $this->getPreloadedText( $preload );
 145                         }
 146                 // For existing pages, get text based on "undo" or section parameters.
 147                 } else {
 148                         $text = $this->mArticle->getContent();
 149                         if ( $undo > 0 && $undoafter > 0 && $undo < $undoafter ) {
 150                                 # If they got undoafter and undo round the wrong way, switch them
 151                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 152                         }
 153                         if ( $undo > 0 && $undo > $undoafter ) {
 154                                 # Undoing a specific edit overrides section editing; section-editing
 155                                 # doesn't work with undoing.
 156                                 if ( $undoafter ) {
 157                                         $undorev = Revision::newFromId($undo);
 158                                         $oldrev = Revision::newFromId($undoafter);
 159                                 } else {
 160                                         $undorev = Revision::newFromId($undo);
 161                                         $oldrev = $undorev ? $undorev->getPrevious() : null;
 162                                 }
 163
 164                                 # Sanity check, make sure it's the right page,
 165                                 # the revisions exist and they were not deleted.
 166                                 # Otherwise, $text will be left as-is.
 167                                 if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 168                                         $undorev->getPage() == $oldrev->getPage() &&
 169                                         $undorev->getPage() == $this->mArticle->getID() &&
 170                                         !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 171                                         !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 172
 173                                         $undotext = $this->mArticle->getUndoText( $undorev, $oldrev );
 174                                         if ( $undotext === false ) {
 175                                                 # Warn the user that something went wrong
 176                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-failure">' . wfMsgNoTrans( 'undo-failure' ) . '</div>' );
 177                                         } else {
 178                                                 $text = $undotext;
 179                                                 # Inform the user of our success and set an automatic edit summary
 180                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="mw-undo-success">' . wfMsgNoTrans( 'undo-success' ) . '</div>' );
 181                                                 $firstrev = $oldrev->getNext();
 182                                                 # If we just undid one rev, use an autosummary
 183                                                 if ( $firstrev->mId == $undo ) {
 184                                                         $this->summary = wfMsgForContent( 'undo-summary', $undo, $undorev->getUserText() );
 185                                                         $this->undidRev = $undo;
 186                                                 }
 187                                                 $this->formtype = 'diff';
 188                                         }
 189                                 } else {
 190                                         // Failed basic sanity checks.
 191                                         // Older revisions may have been removed since the link
 192                                         // was created, or we may simply have got bogus input.
 193                                         $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-norev">' . wfMsgNoTrans( 'undo-norev' ) . '</div>' );
 194                                 }
 195                         } else if ( $section != '' ) {
 196                                 if ( $section == 'new' ) {
 197                                         $text = $this->getPreloadedText( $preload );
 198                                 } else {
 199                                         $text = $wgParser->getSection( $text, $section, $def_text );
 200                                 }
 201                         }
 202                 }
 203
 204                 wfProfileOut( __METHOD__ );
 205                 return $text;
 206         }
 207
 208         /** Use this method before edit() to preload some text into the edit box */
 209         public function setPreloadedText( $text ) {
 210                 $this->mPreloadText = $text;
 211         }
 212
 213         /**
 214          * Get the contents of a page from its title and remove includeonly tags
 215          *
 216          * @param $preload String: the title of the page.
 217          * @return string The contents of the page.
 218          */
 219         protected function getPreloadedText( $preload ) {
 220                 if ( !empty($this->mPreloadText) ) {
 221                         return $this->mPreloadText;
 222                 } elseif ( $preload === '' ) {
 223                         return '';
 224                 } else {
 225                         $preloadTitle = Title::newFromText( $preload );
 226                         if ( isset( $preloadTitle ) && $preloadTitle->userCanRead() ) {
 227                                 $rev = Revision::newFromTitle($preloadTitle);
 228                                 if ( is_object( $rev ) ) {
 229                                         $text = $rev->getText();
 230                                         // TODO FIXME: AAAAAAAAAAA, this shouldn't be implementing
 231                                         // its own mini-parser! -ævar
 232                                         $text = preg_replace( '~</?includeonly>~', '', $text );
 233                                         return $text;
 234                                 } else
 235                                         return '';
 236                         }
 237                 }
 238         }
 239
 240         /**
 241          * This is the function that extracts metadata from the article body on the first view.
 242          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
 243          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
 244          */
 245         function extractMetaDataFromArticle () {
 246                 global $wgUseMetadataEdit, $wgMetadataWhitelist, $wgContLang;
 247                 $this->mMetaData = '';
 248                 if ( !$wgUseMetadataEdit ) return;
 249                 if ( $wgMetadataWhitelist == '' ) return;
 250                 $s = '';
 251                 $t = $this->getContent();
 252
 253                 # MISSING : <nowiki> filtering
 254
 255                 # Categories and language links
 256                 $t = explode ( "\n" , $t );
 257                 $catlow = strtolower ( $wgContLang->getNsText( NS_CATEGORY ) );
 258                 $cat = $ll = array();
 259                 foreach ( $t AS $key => $x ) {
 260                         $y = trim ( strtolower ( $x ) );
 261                         while ( substr ( $y , 0 , 2 ) == '[[' ) {
 262                                 $y = explode ( ']]' , trim ( $x ) );
 263                                 $first = array_shift ( $y );
 264                                 $first = explode ( ':' , $first );
 265                                 $ns = array_shift ( $first );
 266                                 $ns = trim ( str_replace ( '[' , '' , $ns ) );
 267                                 if ( $wgContLang->getLanguageName( $ns ) || strtolower ( $ns ) == $catlow ) {
 268                                         $add = '[[' . $ns . ':' . implode ( ':' , $first ) . ']]';
 269                                         if ( strtolower ( $ns ) == $catlow ) $cat[] = $add;
 270                                         else $ll[] = $add;
 271                                         $x = implode ( ']]' , $y );
 272                                         $t[$key] = $x;
 273                                         $y = trim ( strtolower ( $x ) );
 274                                 } else {
 275                                         $x = implode ( ']]' , $y );
 276                                         $y = trim ( strtolower ( $x ) );
 277                                 }
 278                         }
 279                 }
 280                 if ( count ( $cat ) ) $s .= implode ( ' ' , $cat ) . "\n";
 281                 if ( count ( $ll ) ) $s .= implode ( ' ' , $ll ) . "\n";
 282                 $t = implode ( "\n" , $t );
 283
 284                 # Load whitelist
 285                 $sat = array () ; # stand-alone-templates; must be lowercase
 286                 $wl_title = Title::newFromText ( $wgMetadataWhitelist );
 287                 $wl_article = new Article ( $wl_title );
 288                 $wl = explode ( "\n" , $wl_article->getContent() );
 289                 foreach ( $wl AS $x ) {
 290                         $isentry = false;
 291                         $x = trim ( $x );
 292                         while ( substr ( $x , 0 , 1 ) == '*' ) {
 293                                 $isentry = true;
 294                                 $x = trim ( substr ( $x , 1 ) );
 295                         }
 296                         if ( $isentry ) {
 297                                 $sat[] = strtolower ( $x );
 298                         }
 299
 300                 }
 301
 302                 # Templates, but only some
 303                 $t = explode ( '{{' , $t );
 304                 $tl = array () ;
 305                 foreach ( $t AS $key => $x ) {
 306                         $y = explode ( '}}' , $x , 2 );
 307                         if ( count ( $y ) == 2 ) {
 308                                 $z = $y[0];
 309                                 $z = explode ( '|' , $z );
 310                                 $tn = array_shift ( $z );
 311                                 if ( in_array ( strtolower ( $tn ) , $sat ) ) {
 312                                         $tl[] = '{{' . $y[0] . '}}';
 313                                         $t[$key] = $y[1];
 314                                         $y = explode ( '}}' , $y[1] , 2 );
 315                                 }
 316                                 else $t[$key] = '{{' . $x;
 317                         }
 318                         else if ( $key != 0 ) $t[$key] = '{{' . $x;
 319                         else $t[$key] = $x;
 320                 }
 321                 if ( count ( $tl ) ) $s .= implode ( ' ' , $tl );
 322                 $t = implode ( '' , $t );
 323
 324                 $t = str_replace ( "\n\n\n" , "\n" , $t );
 325                 $this->mArticle->mContent = $t;
 326                 $this->mMetaData = $s;
 327         }
 328
 329         /*
 330          * Check if a page was deleted while the user was editing it, before submit.
 331          * Note that we rely on the logging table, which hasn't been always there,
 332          * but that doesn't matter, because this only applies to brand new
 333          * deletes.
 334          */
 335         protected function wasDeletedSinceLastEdit() {
 336                 if ( $this->deletedSinceEdit )
 337                         return true;
 338                 if ( $this->mTitle->isDeletedQuick() ) {
 339                         $this->lastDelete = $this->getLastDelete();
 340                         if ( $this->lastDelete ) {
 341                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
 342                                 if ( $deleteTime > $this->starttime ) {
 343                                         $this->deletedSinceEdit = true;
 344                                 }
 345                         }
 346                 }
 347                 return $this->deletedSinceEdit;
 348         }
 349
 350         function submit() {
 351                 $this->edit();
 352         }
 353
 354         /**
 355          * This is the function that gets called for "action=edit". It
 356          * sets up various member variables, then passes execution to
 357          * another function, usually showEditForm()
 358          *
 359          * The edit form is self-submitting, so that when things like
 360          * preview and edit conflicts occur, we get the same form back
 361          * with the extra stuff added.  Only when the final submission
 362          * is made and all is well do we actually save and redirect to
 363          * the newly-edited page.
 364          */
 365         function edit() {
 366                 global $wgOut, $wgRequest, $wgEnableJS2system;
 367                 // Allow extensions to modify/prevent this form or submission
 368                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 369                         return;
 370                 }
 371
 372                 wfProfileIn( __METHOD__ );
 373                 wfDebug( __METHOD__.": enter\n" );
 374
 375                 // This is not an article
 376                 $wgOut->setArticleFlag( false );
 377
 378                 $this->importFormData( $wgRequest );
 379                 $this->firsttime = false;
 380
 381                 if ( $this->live ) {
 382                         $this->livePreview();
 383                         wfProfileOut( __METHOD__ );
 384                         return;
 385                 }
 386
 387                 if ( wfReadOnly() && $this->save ) {
 388                         // Force preview
 389                         $this->save = false;
 390                         $this->preview = true;
 391                 }
 392
 393                 $wgOut->addScriptFile( 'edit.js' );
 394
 395                 if( $wgEnableJS2system )
 396                     $wgOut->addScriptClass( 'editPage' );
 397
 398                 $permErrors = $this->getEditPermissionErrors();
 399                 if ( $permErrors ) {
 400                         wfDebug( __METHOD__.": User can't edit\n" );
 401                         $this->readOnlyPage( $this->getContent(), true, $permErrors, 'edit' );
 402                         wfProfileOut( __METHOD__ );
 403                         return;
 404                 } else {
 405                         if ( $this->save ) {
 406                                 $this->formtype = 'save';
 407                         } else if ( $this->preview ) {
 408                                 $this->formtype = 'preview';
 409                         } else if ( $this->diff ) {
 410                                 $this->formtype = 'diff';
 411                         } else { # First time through
 412                                 $this->firsttime = true;
 413                                 if ( $this->previewOnOpen() ) {
 414                                         $this->formtype = 'preview';
 415                                 } else {
 416                                         $this->extractMetaDataFromArticle () ;
 417                                         $this->formtype = 'initial';
 418                                 }
 419                         }
 420                 }
 421
 422                 # Evaluate if the edit interface should be shown or
 423                 # if the page should be shown, in case redlink=true
 424                 if ( $wgRequest->getBool( 'redlink' ) )
 425                         $this->showPageOnRedlink();
 426
 427                 wfProfileIn( __METHOD__."-business-end" );
 428
 429                 $this->isConflict = false;
 430                 // css / js subpages of user pages get a special treatment
 431                 $this->isCssJsSubpage      = $this->mTitle->isCssJsSubpage();
 432                 $this->isCssSubpage        = $this->mTitle->isCssSubpage();
 433                 $this->isJsSubpage         = $this->mTitle->isJsSubpage();
 434                 $this->isValidCssJsSubpage = $this->mTitle->isValidCssJsSubpage();
 435
 436                 # Show applicable editing introductions
 437                 if ( $this->formtype == 'initial' || $this->firsttime )
 438                         $this->showIntro();
 439
 440                 if ( $this->mTitle->isTalkPage() ) {
 441                         $wgOut->addWikiMsg( 'talkpagetext' );
 442                 }
 443
 444                 # Optional notices on a per-namespace and per-page basis
 445                 $editnotice_ns   = 'editnotice-'.$this->mTitle->getNamespace();
 446                 if ( !wfEmptyMsg( $editnotice_ns, wfMsgForContent( $editnotice_ns ) ) ) {
 447                         $wgOut->addWikiText( wfMsgForContent( $editnotice_ns )  );
 448                 }
 449                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
 450                         $parts = explode( '/', $this->mTitle->getDBkey() );
 451                         $editnotice_base = $editnotice_ns;
 452                         while ( count( $parts ) > 0 ) {
 453                                 $editnotice_base .= '-'.array_shift( $parts );
 454                                 if ( !wfEmptyMsg( $editnotice_base, wfMsgForContent( $editnotice_base ) ) ) {
 455                                         $wgOut->addWikiText( wfMsgForContent( $editnotice_base )  );
 456                                 }
 457                         }
 458                 }
 459
 460                 # Attempt submission here.  This will check for edit conflicts,
 461                 # and redundantly check for locked database, blocked IPs, etc.
 462                 # that edit() already checked just in case someone tries to sneak
 463                 # in the back door with a hand-edited submission URL.
 464
 465                 if ( 'save' == $this->formtype ) {
 466                         if ( !$this->attemptSave() ) {
 467                                 wfProfileOut( __METHOD__."-business-end" );
 468                                 wfProfileOut( __METHOD__ );
 469                                 return;
 470                         }
 471                 }
 472
 473                 # First time through: get contents, set time for conflict
 474                 # checking, etc.
 475                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 476                         if ( $this->initialiseForm() === false) {
 477                                 $this->noSuchSectionPage();
 478                                 wfProfileOut( __METHOD__."-business-end" );
 479                                 wfProfileOut( __METHOD__ );
 480                                 return;
 481                         }
 482                         if ( !$this->mTitle->getArticleId() )
 483                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 484                 }
 485
 486                 $this->showEditForm();
 487                 wfProfileOut( __METHOD__."-business-end" );
 488                 wfProfileOut( __METHOD__ );
 489         }
 490
 491         /*
 492          * Evaluate if the edit interface should be shown or the page, in case redlink=true.
 493          * If the page exists, it is always shown. If it doesn't, it depends on the settings
 494          * of $wgShowPageOnRedlink (see DefaultSettings for documentation).
 495          */
 496         protected function showPageOnRedlink() {
 497                 global $wgShowPageOnRedlink, $wgUser, $wgRequest, $wgOut;
 498                 $redirectToPage = false;
 499                 # If the page exists (it has been created after the link has been emerged),
 500                 # redirect to the page instead of editing the current page
 501                 if ( $this->mTitle->exists() )
 502                         $wgOut->redirect( $this->mTitle->getFullURL() );
 503                 # Check site configuration ($wgShowPageOnRedlink)
 504                 if ( is_array( $wgShowPageOnRedlink ) ) {
 505                         $ns = $this->mTitle->getNamespace();
 506                         $groups = $wgUser->getEffectiveGroups();
 507                         # Gets overwritten if user is member of a group that has been specified:
 508                         $redirectToPage = true;
 509                         foreach ( $groups as $i => $group ) {
 510                                 # Test if there is a rule for a specific usergroup and a specific namespace
 511                                 if ( isset( $wgShowPageOnRedlink[$group][$ns] ) && $wgShowPageOnRedlink[$group][$ns] == false ) {
 512                                         $redirectToPage = false;
 513                                 }
 514                                 # Test if there is a rule for a specific usergroup in all namespaces
 515                                 elseif ( isset( $wgShowPageOnRedlink[$group] ) && !is_array( $wgShowPageOnRedlink[$group] )
 516                                            && $wgShowPageOnRedlink[$group] == false ) {
 517                                         $redirectToPage = false;
 518                                 }
 519                         }
 520                 }
 521                 else {
 522                         $redirectToPage = $wgShowPageOnRedlink;
 523                 }
 524                 if ( $redirectToPage ) {
 525                         $wgOut->redirect( $this->mTitle->getFullURL() );
 526                 }
 527         }
 528
 529         protected function getEditPermissionErrors() {
 530                 global $wgUser;
 531                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 532                 # Can this title be created?
 533                 if ( !$this->mTitle->exists() ) {
 534                         $permErrors = array_merge( $permErrors,
 535                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 536                 }
 537                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 538                 $remove = array();
 539                 foreach( $permErrors as $error ) {
 540                         if ( ($this->preview || $this->diff) &&
 541                                 ($error[0] == 'blockedtext' || $error[0] == 'autoblockedtext') )
 542                         {
 543                                 $remove[] = $error;
 544                         }
 545                 }
 546                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 547                 return $permErrors;
 548         }
 549
 550         /**
 551          * Show a read-only error
 552          * Parameters are the same as OutputPage:readOnlyPage()
 553          * Redirect to the article page if redlink=1
 554          */
 555         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 556                 global $wgRequest, $wgOut;
 557                 if ( $wgRequest->getBool( 'redlink' ) ) {
 558                         // The edit page was reached via a red link.
 559                         // Redirect to the article page and let them click the edit tab if
 560                         // they really want a permission error.
 561                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 562                 } else {
 563                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 564                 }
 565         }
 566
 567         /**
 568          * Should we show a preview when the edit form is first shown?
 569          *
 570          * @return bool
 571          */
 572         protected function previewOnOpen() {
 573                 global $wgRequest, $wgUser;
 574                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 575                         // Explicit override from request
 576                         return true;
 577                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 578                         // Explicit override from request
 579                         return false;
 580                 } elseif ( $this->section == 'new' ) {
 581                         // Nothing *to* preview for new sections
 582                         return false;
 583                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 584                         // Standard preference behaviour
 585                         return true;
 586                 } elseif ( !$this->mTitle->exists() && $this->mTitle->getNamespace() == NS_CATEGORY ) {
 587                         // Categories are special
 588                         return true;
 589                 } else {
 590                         return false;
 591                 }
 592         }
 593
 594         /**
 595          * @todo document
 596          * @param $request
 597          */
 598         function importFormData( &$request ) {
 599                 global $wgLang, $wgUser;
 600                 $fname = 'EditPage::importFormData';
 601                 wfProfileIn( $fname );
 602
 603                 # Section edit can come from either the form or a link
 604                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 605
 606                 if ( $request->wasPosted() ) {
 607                         # These fields need to be checked for encoding.
 608                         # Also remove trailing whitespace, but don't remove _initial_
 609                         # whitespace from the text boxes. This may be significant formatting.
 610                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 611                         $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
 612                         $this->mMetaData = rtrim( $request->getText( 'metadata' ) );
 613                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 614                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary' ), 250, '' );
 615
 616                         # Remove extra headings from summaries and new sections.
 617                         $this->summary = preg_replace('/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary);
 618
 619                         $this->edittime = $request->getVal( 'wpEdittime' );
 620                         $this->starttime = $request->getVal( 'wpStarttime' );
 621
 622                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 623
 624                         if ( is_null( $this->edittime ) ) {
 625                                 # If the form is incomplete, force to preview.
 626                                 wfDebug( "$fname: Form data appears to be incomplete\n" );
 627                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 628                                 $this->preview = true;
 629                         } else {
 630                                 /* Fallback for live preview */
 631                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 632                                 $this->diff = $request->getCheck( 'wpDiff' );
 633
 634                                 // Remember whether a save was requested, so we can indicate
 635                                 // if we forced preview due to session failure.
 636                                 $this->mTriedSave = !$this->preview;
 637
 638                                 if ( $this->tokenOk( $request ) ) {
 639                                         # Some browsers will not report any submit button
 640                                         # if the user hits enter in the comment box.
 641                                         # The unmarked state will be assumed to be a save,
 642                                         # if the form seems otherwise complete.
 643                                         wfDebug( "$fname: Passed token check.\n" );
 644                                 } else if ( $this->diff ) {
 645                                         # Failed token check, but only requested "Show Changes".
 646                                         wfDebug( "$fname: Failed token check; Show Changes requested.\n" );
 647                                 } else {
 648                                         # Page might be a hack attempt posted from
 649                                         # an external site. Preview instead of saving.
 650                                         wfDebug( "$fname: Failed token check; forcing preview\n" );
 651                                         $this->preview = true;
 652                                 }
 653                         }
 654                         $this->save = !$this->preview && !$this->diff;
 655                         if ( !preg_match( '/^\d{14}$/', $this->edittime )) {
 656                                 $this->edittime = null;
 657                         }
 658
 659                         if ( !preg_match( '/^\d{14}$/', $this->starttime )) {
 660                                 $this->starttime = null;
 661                         }
 662
 663                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 664
 665                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 666                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 667
 668                         # Don't force edit summaries when a user is editing their own user or talk page
 669                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 670                                 $this->mTitle->getText() == $wgUser->getName() )
 671                         {
 672                                 $this->allowBlankSummary = true;
 673                         } else {
 674                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary');
 675                         }
 676
 677                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 678                 } else {
 679                         # Not a posted form? Start with nothing.
 680                         wfDebug( "$fname: Not a posted form.\n" );
 681                         $this->textbox1  = '';
 682                         $this->textbox2  = '';
 683                         $this->mMetaData = '';
 684                         $this->summary   = '';
 685                         $this->edittime  = '';
 686                         $this->starttime = wfTimestampNow();
 687                         $this->edit      = false;
 688                         $this->preview   = false;
 689                         $this->save      = false;
 690                         $this->diff      = false;
 691                         $this->minoredit = false;
 692                         $this->watchthis = false;
 693                         $this->recreate  = false;
 694
 695                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 696                                 $this->summary = $request->getVal( 'preloadtitle' );
 697                         }
 698                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 699                                 $this->summary = $request->getText( 'summary' );
 700                         }
 701
 702                         if ( $request->getVal( 'minor' ) ) {
 703                                 $this->minoredit = true;
 704                         }
 705                 }
 706
 707                 // FIXME: unused variable?
 708                 $this->oldid = $request->getInt( 'oldid' );
 709
 710                 $this->live = $request->getCheck( 'live' );
 711                 $this->editintro = $request->getText( 'editintro' );
 712
 713                 wfProfileOut( $fname );
 714
 715                 // Allow extensions to modify form data
 716                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 717         }
 718
 719         /**
 720          * Make sure the form isn't faking a user's credentials.
 721          *
 722          * @param $request WebRequest
 723          * @return bool
 724          * @private
 725          */
 726         function tokenOk( &$request ) {
 727                 global $wgUser;
 728                 $token = $request->getVal( 'wpEditToken' );
 729                 $this->mTokenOk = $wgUser->matchEditToken( $token );
 730                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
 731                 return $this->mTokenOk;
 732         }
 733
 734         /**
 735          * Show all applicable editing introductions
 736          */
 737         protected function showIntro() {
 738                 global $wgOut, $wgUser;
 739                 if ( $this->suppressIntro ) {
 740                         return;
 741                 }
 742
 743                 $namespace = $this->mTitle->getNamespace();
 744
 745                 if ( $namespace == NS_MEDIAWIKI ) {
 746                         # Show a warning if editing an interface message
 747                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1</div>", 'editinginterface' );
 748                 }
 749
 750                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exists
 751                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
 752                         $parts = explode( '/', $this->mTitle->getText(), 2 );
 753                         $username = $parts[0];
 754                         $id = User::idFromName( $username );
 755                         $ip = User::isIP( $username );
 756                         if ( $id == 0 && !$ip ) {
 757                                 $wgOut->wrapWikiMsg( '<div class="mw-userpage-userdoesnotexist error">$1</div>',
 758                                         array( 'userpage-userdoesnotexist', $username ) );
 759                         }
 760                 }
 761                 # Try to add a custom edit intro, or use the standard one if this is not possible.
 762                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
 763                         if ( $wgUser->isLoggedIn() ) {
 764                                 $wgOut->wrapWikiMsg( '<div class="mw-newarticletext">$1</div>', 'newarticletext' );
 765                         } else {
 766                                 $wgOut->wrapWikiMsg( '<div class="mw-newarticletextanon">$1</div>', 'newarticletextanon' );
 767                         }
 768                 }
 769                 # Give a notice if the user is editing a deleted/moved page...
 770                 if ( !$this->mTitle->exists() ) {
 771                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle->getPrefixedText(),
 772                                 '', array( 'lim' => 10,
 773                                            'conds' => array( "log_action != 'revision'" ),
 774                                            'showIfEmpty' => false,
 775                                            'msgKey' => array( 'recreate-moveddeleted-warn') )
 776                         );
 777                 }
 778         }
 779
 780         /**
 781          * Attempt to show a custom editing introduction, if supplied
 782          *
 783          * @return bool
 784          */
 785         protected function showCustomIntro() {
 786                 if ( $this->editintro ) {
 787                         $title = Title::newFromText( $this->editintro );
 788                         if ( $title instanceof Title && $title->exists() && $title->userCanRead() ) {
 789                                 global $wgOut;
 790                                 $revision = Revision::newFromTitle( $title );
 791                                 $wgOut->addWikiTextTitleTidy( $revision->getText(), $this->mTitle );
 792                                 return true;
 793                         } else {
 794                                 return false;
 795                         }
 796                 } else {
 797                         return false;
 798                 }
 799         }
 800
 801         /**
 802          * Attempt submission (no UI)
 803          * @return one of the constants describing the result
 804          */
 805         function internalAttemptSave( &$result, $bot = false ) {
 806                 global $wgFilterCallback, $wgUser, $wgOut, $wgParser;
 807                 global $wgMaxArticleSize;
 808
 809                 $fname = 'EditPage::attemptSave';
 810                 wfProfileIn( $fname );
 811                 wfProfileIn( "$fname-checks" );
 812
 813                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) )
 814                 {
 815                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
 816                         return self::AS_HOOK_ERROR;
 817                 }
 818
 819                 # Check image redirect
 820                 if ( $this->mTitle->getNamespace() == NS_FILE &&
 821                         Title::newFromRedirect( $this->textbox1 ) instanceof Title &&
 822                         !$wgUser->isAllowed( 'upload' ) ) {
 823                                 if ( $wgUser->isAnon() ) {
 824                                         return self::AS_IMAGE_REDIRECT_ANON;
 825                                 } else {
 826                                         return self::AS_IMAGE_REDIRECT_LOGGED;
 827                                 }
 828                 }
 829
 830                 # Reintegrate metadata
 831                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 832                 $this->mMetaData = '' ;
 833
 834                 # Check for spam
 835                 $match = self::matchSummarySpamRegex( $this->summary );
 836                 if ( $match === false ) {
 837                         $match = self::matchSpamRegex( $this->textbox1 );
 838                 }
 839                 if ( $match !== false ) {
 840                         $result['spam'] = $match;
 841                         $ip = wfGetIP();
 842                         $pdbk = $this->mTitle->getPrefixedDBkey();
 843                         $match = str_replace( "\n", '', $match );
 844                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
 845                         wfProfileOut( "$fname-checks" );
 846                         wfProfileOut( $fname );
 847                         return self::AS_SPAM_ERROR;
 848                 }
 849                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
 850                         # Error messages or other handling should be performed by the filter function
 851                         wfProfileOut( "$fname-checks" );
 852                         wfProfileOut( $fname );
 853                         return self::AS_FILTERING;
 854                 }
 855                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
 856                         # Error messages etc. could be handled within the hook...
 857                         wfProfileOut( "$fname-checks" );
 858                         wfProfileOut( $fname );
 859                         return self::AS_HOOK_ERROR;
 860                 } elseif ( $this->hookError != '' ) {
 861                         # ...or the hook could be expecting us to produce an error
 862                         wfProfileOut( "$fname-checks" );
 863                         wfProfileOut( $fname );
 864                         return self::AS_HOOK_ERROR_EXPECTED;
 865                 }
 866                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 867                         # Check block state against master, thus 'false'.
 868                         wfProfileOut( "$fname-checks" );
 869                         wfProfileOut( $fname );
 870                         return self::AS_BLOCKED_PAGE_FOR_USER;
 871                 }
 872                 $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 873                 if ( $this->kblength > $wgMaxArticleSize ) {
 874                         // Error will be displayed by showEditForm()
 875                         $this->tooBig = true;
 876                         wfProfileOut( "$fname-checks" );
 877                         wfProfileOut( $fname );
 878                         return self::AS_CONTENT_TOO_BIG;
 879                 }
 880
 881                 if ( !$wgUser->isAllowed('edit') ) {
 882                         if ( $wgUser->isAnon() ) {
 883                                 wfProfileOut( "$fname-checks" );
 884                                 wfProfileOut( $fname );
 885                                 return self::AS_READ_ONLY_PAGE_ANON;
 886                         }
 887                         else {
 888                                 wfProfileOut( "$fname-checks" );
 889                                 wfProfileOut( $fname );
 890                                 return self::AS_READ_ONLY_PAGE_LOGGED;
 891                         }
 892                 }
 893
 894                 if ( wfReadOnly() ) {
 895                         wfProfileOut( "$fname-checks" );
 896                         wfProfileOut( $fname );
 897                         return self::AS_READ_ONLY_PAGE;
 898                 }
 899                 if ( $wgUser->pingLimiter() ) {
 900                         wfProfileOut( "$fname-checks" );
 901                         wfProfileOut( $fname );
 902                         return self::AS_RATE_LIMITED;
 903                 }
 904
 905                 # If the article has been deleted while editing, don't save it without
 906                 # confirmation
 907                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
 908                         wfProfileOut( "$fname-checks" );
 909                         wfProfileOut( $fname );
 910                         return self::AS_ARTICLE_WAS_DELETED;
 911                 }
 912
 913                 wfProfileOut( "$fname-checks" );
 914
 915                 # If article is new, insert it.
 916                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 917                 if ( 0 == $aid ) {
 918                         // Late check for create permission, just in case *PARANOIA*
 919                         if ( !$this->mTitle->userCan( 'create' ) ) {
 920                                 wfDebug( "$fname: no create permission\n" );
 921                                 wfProfileOut( $fname );
 922                                 return self::AS_NO_CREATE_PERMISSION;
 923                         }
 924
 925                         # Don't save a new article if it's blank.
 926                         if ( '' == $this->textbox1 ) {
 927                                 wfProfileOut( $fname );
 928                                 return self::AS_BLANK_ARTICLE;
 929                         }
 930
 931                         // Run post-section-merge edit filter
 932                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
 933                                 # Error messages etc. could be handled within the hook...
 934                                 wfProfileOut( $fname );
 935                                 return self::AS_HOOK_ERROR;
 936                         } elseif ( $this->hookError != '' ) {
 937                                 # ...or the hook could be expecting us to produce an error
 938                                 wfProfileOut( $fname );
 939                                 return self::AS_HOOK_ERROR_EXPECTED;
 940                         }
 941
 942                         # Handle the user preference to force summaries here. Check if it's not a redirect.
 943                         if ( !$this->allowBlankSummary && !Title::newFromRedirect( $this->textbox1 ) ) {
 944                                 if ( md5( $this->summary ) == $this->autoSumm ) {
 945                                         $this->missingSummary = true;
 946                                         wfProfileOut( $fname );
 947                                         return self::AS_SUMMARY_NEEDED;
 948                                 }
 949                         }
 950
 951                         $isComment = ( $this->section == 'new' );
 952
 953                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 954                                 $this->minoredit, $this->watchthis, false, $isComment, $bot );
 955
 956                         wfProfileOut( $fname );
 957                         return self::AS_SUCCESS_NEW_ARTICLE;
 958                 }
 959
 960                 # Article exists. Check for edit conflict.
 961
 962                 $this->mArticle->clear(); # Force reload of dates, etc.
 963                 $this->mArticle->forUpdate( true ); # Lock the article
 964
 965                 wfDebug("timestamp: {$this->mArticle->getTimestamp()}, edittime: {$this->edittime}\n");
 966
 967                 if ( $this->mArticle->getTimestamp() != $this->edittime ) {
 968                         $this->isConflict = true;
 969                         if ( $this->section == 'new' ) {
 970                                 if ( $this->mArticle->getUserText() == $wgUser->getName() &&
 971                                         $this->mArticle->getComment() == $this->summary ) {
 972                                         // Probably a duplicate submission of a new comment.
 973                                         // This can happen when squid resends a request after
 974                                         // a timeout but the first one actually went through.
 975                                         wfDebug( "EditPage::editForm duplicate new section submission; trigger edit conflict!\n" );
 976                                 } else {
 977                                         // New comment; suppress conflict.
 978                                         $this->isConflict = false;
 979                                         wfDebug( "EditPage::editForm conflict suppressed; new section\n" );
 980                                 }
 981                         }
 982                 }
 983                 $userid = $wgUser->getId();
 984
 985                 # Suppress edit conflict with self, except for section edits where merging is required.
 986                 if ( $this->isConflict && $this->section == '' && $this->userWasLastToEdit($userid,$this->edittime) ) {
 987                         wfDebug( "EditPage::editForm Suppressing edit conflict, same user.\n" );
 988                         $this->isConflict = false;
 989                 }
 990
 991                 if ( $this->isConflict ) {
 992                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 993                                 $this->mArticle->getTimestamp() . "')\n" );
 994                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime );
 995                 } else {
 996                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 997                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary );
 998                 }
 999                 if ( is_null( $text ) ) {
1000                         wfDebug( "EditPage::editForm activating conflict; section replace failed.\n" );
1001                         $this->isConflict = true;
1002                         $text = $this->textbox1; // do not try to merge here!
1003                 } else if ( $this->isConflict ) {
1004                         # Attempt merge
1005                         if ( $this->mergeChangesInto( $text ) ) {
1006                                 // Successful merge! Maybe we should tell the user the good news?
1007                                 $this->isConflict = false;
1008                                 wfDebug( "EditPage::editForm Suppressing edit conflict, successful merge.\n" );
1009                         } else {
1010                                 $this->section = '';
1011                                 $this->textbox1 = $text;
1012                                 wfDebug( "EditPage::editForm Keeping edit conflict, failed merge.\n" );
1013                         }
1014                 }
1015
1016                 if ( $this->isConflict ) {
1017                         wfProfileOut( $fname );
1018                         return self::AS_CONFLICT_DETECTED;
1019                 }
1020
1021                 $oldtext = $this->mArticle->getContent();
1022
1023                 // Run post-section-merge edit filter
1024                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$this->hookError, $this->summary ) ) ) {
1025                         # Error messages etc. could be handled within the hook...
1026                         wfProfileOut( $fname );
1027                         return self::AS_HOOK_ERROR;
1028                 } elseif ( $this->hookError != '' ) {
1029                         # ...or the hook could be expecting us to produce an error
1030                         wfProfileOut( $fname );
1031                         return self::AS_HOOK_ERROR_EXPECTED;
1032                 }
1033
1034                 # Handle the user preference to force summaries here, but not for null edits
1035                 if ( $this->section != 'new' && !$this->allowBlankSummary && 0 != strcmp($oldtext,$text)
1036                         && !Title::newFromRedirect( $text ) ) # check if it's not a redirect
1037                 {
1038                         if ( md5( $this->summary ) == $this->autoSumm ) {
1039                                 $this->missingSummary = true;
1040                                 wfProfileOut( $fname );
1041                                 return self::AS_SUMMARY_NEEDED;
1042                         }
1043                 }
1044
1045                 # And a similar thing for new sections
1046                 if ( $this->section == 'new' && !$this->allowBlankSummary ) {
1047                         if (trim($this->summary) == '') {
1048                                 $this->missingSummary = true;
1049                                 wfProfileOut( $fname );
1050                                 return self::AS_SUMMARY_NEEDED;
1051                         }
1052                 }
1053
1054                 # All's well
1055                 wfProfileIn( "$fname-sectionanchor" );
1056                 $sectionanchor = '';
1057                 if ( $this->section == 'new' ) {
1058                         if ( $this->textbox1 == '' ) {
1059                                 $this->missingComment = true;
1060                                 return self::AS_TEXTBOX_EMPTY;
1061                         }
1062                         if ( $this->summary != '' ) {
1063                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $this->summary );
1064                                 # This is a new section, so create a link to the new section
1065                                 # in the revision summary.
1066                                 $cleanSummary = $wgParser->stripSectionName( $this->summary );
1067                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1068                         }
1069                 } elseif ( $this->section != '' ) {
1070                         # Try to get a section anchor from the section source, redirect to edited section if header found
1071                         # XXX: might be better to integrate this into Article::replaceSection
1072                         # for duplicate heading checking and maybe parsing
1073                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1074                         # we can't deal with anchors, includes, html etc in the header for now,
1075                         # headline would need to be parsed to improve this
1076                         if ( $hasmatch and strlen($matches[2]) > 0 ) {
1077                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $matches[2] );
1078                         }
1079                 }
1080                 wfProfileOut( "$fname-sectionanchor" );
1081
1082                 // Save errors may fall down to the edit form, but we've now
1083                 // merged the section into full text. Clear the section field
1084                 // so that later submission of conflict forms won't try to
1085                 // replace that into a duplicated mess.
1086                 $this->textbox1 = $text;
1087                 $this->section = '';
1088
1089                 // Check for length errors again now that the section is merged in
1090                 $this->kblength = (int)(strlen( $text ) / 1024);
1091                 if ( $this->kblength > $wgMaxArticleSize ) {
1092                         $this->tooBig = true;
1093                         wfProfileOut( $fname );
1094                         return self::AS_MAX_ARTICLE_SIZE_EXCEEDED;
1095                 }
1096
1097                 # update the article here
1098                 if ( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
1099                         $this->watchthis, $bot, $sectionanchor ) )
1100                 {
1101                         wfProfileOut( $fname );
1102                         return self::AS_SUCCESS_UPDATE;
1103                 } else {
1104                         $this->isConflict = true;
1105                 }
1106                 wfProfileOut( $fname );
1107                 return self::AS_END;
1108         }
1109
1110         /**
1111          * Check if no edits were made by other users since
1112          * the time a user started editing the page. Limit to
1113          * 50 revisions for the sake of performance.
1114          */
1115         protected function userWasLastToEdit( $id, $edittime ) {
1116                 if( !$id ) return false;
1117                 $dbw = wfGetDB( DB_MASTER );
1118                 $res = $dbw->select( 'revision',
1119                         'rev_user',
1120                         array(
1121                                 'rev_page' => $this->mArticle->getId(),
1122                                 'rev_timestamp > '.$dbw->addQuotes( $dbw->timestamp($edittime) )
1123                         ),
1124                         __METHOD__,
1125                         array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
1126                 while( $row = $res->fetchObject() ) {
1127                         if( $row->rev_user != $id ) {
1128                                 return false;
1129                         }
1130                 }
1131                 return true;
1132         }
1133
1134         /**
1135          * Check given input text against $wgSpamRegex, and return the text of the first match.
1136          * @return mixed -- matching string or false
1137          */
1138         public static function matchSpamRegex( $text ) {
1139                 global $wgSpamRegex;
1140                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1141                 $regexes = (array)$wgSpamRegex;
1142                 return self::matchSpamRegexInternal( $text, $regexes );
1143         }
1144
1145         /**
1146          * Check given input text against $wgSpamRegex, and return the text of the first match.
1147          * @return mixed -- matching string or false
1148          */
1149         public static function matchSummarySpamRegex( $text ) {
1150                 global $wgSummarySpamRegex;
1151                 $regexes = (array)$wgSummarySpamRegex;
1152                 return self::matchSpamRegexInternal( $text, $regexes );
1153         }
1154
1155         protected static function matchSpamRegexInternal( $text, $regexes ) {
1156                 foreach( $regexes as $regex ) {
1157                         $matches = array();
1158                         if( preg_match( $regex, $text, $matches ) ) {
1159                                 return $matches[0];
1160                         }
1161                 }
1162                 return false;
1163         }
1164
1165         /**
1166          * Initialise form fields in the object
1167          * Called on the first invocation, e.g. when a user clicks an edit link
1168          */
1169         function initialiseForm() {
1170                 $this->edittime = $this->mArticle->getTimestamp();
1171                 $this->textbox1 = $this->getContent( false );
1172                 if ( $this->textbox1 === false ) return false;
1173                 wfProxyCheck();
1174                 return true;
1175         }
1176
1177         function setHeaders() {
1178                 global $wgOut, $wgTitle;
1179                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1180                 if ( $this->formtype == 'preview' ) {
1181                         $wgOut->setPageTitleActionText( wfMsg( 'preview' ) );
1182                 }
1183                 if ( $this->isConflict ) {
1184                         $wgOut->setPageTitle( wfMsg( 'editconflict', $wgTitle->getPrefixedText() ) );
1185                 } elseif ( $this->section != '' ) {
1186                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1187                         $wgOut->setPageTitle( wfMsg( $msg, $wgTitle->getPrefixedText() ) );
1188                 } else {
1189                         # Use the title defined by DISPLAYTITLE magic word when present
1190                         if ( isset($this->mParserOutput)
1191                          && ( $dt = $this->mParserOutput->getDisplayTitle() ) !== false ) {
1192                                 $title = $dt;
1193                         } else {
1194                                 $title = $wgTitle->getPrefixedText();
1195                         }
1196                         $wgOut->setPageTitle( wfMsg( 'editing', $title ) );
1197                 }
1198         }
1199
1200         /**
1201          * Send the edit form and related headers to $wgOut
1202          * @param $formCallback Optional callable that takes an OutputPage
1203          *                      parameter; will be called during form output
1204          *                      near the top, for captchas and the like.
1205          */
1206         function showEditForm( $formCallback=null ) {
1207                 global $wgOut, $wgUser, $wgLang, $wgContLang, $wgMaxArticleSize, $wgTitle, $wgRequest;
1208
1209                 # If $wgTitle is null, that means we're in API mode.
1210                 # Some hook probably called this function  without checking
1211                 # for is_null($wgTitle) first. Bail out right here so we don't
1212                 # do lots of work just to discard it right after.
1213                 if (is_null($wgTitle))
1214                         return;
1215
1216                 $fname = 'EditPage::showEditForm';
1217                 wfProfileIn( $fname );
1218
1219                 $sk = $wgUser->getSkin();
1220
1221                 #need to parse the preview early so that we know which templates are used,
1222                 #otherwise users with "show preview after edit box" will get a blank list
1223                 #we parse this near the beginning so that setHeaders can do the title
1224                 #setting work instead of leaving it in getPreviewText
1225                 $previewOutput = '';
1226                 if ( $this->formtype == 'preview' ) {
1227                         $previewOutput = $this->getPreviewText();
1228                 }
1229
1230                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) ) ;
1231
1232                 $this->setHeaders();
1233
1234                 # Enabled article-related sidebar, toplinks, etc.
1235                 $wgOut->setArticleRelated( true );
1236
1237                 $cancelParams = array();
1238
1239                 if ( $this->isConflict ) {
1240                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1</div>", 'explainconflict' );
1241
1242                         $this->textbox2 = $this->textbox1;
1243                         $this->textbox1 = $this->getContent();
1244                         $this->edittime = $this->mArticle->getTimestamp();
1245                 } else {
1246                         if ( $this->section != '' && $this->section != 'new' ) {
1247                                 $matches = array();
1248                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
1249                                         preg_match( "/^(=+)(.+)\\1/mi", $this->textbox1, $matches );
1250                                         if ( !empty( $matches[2] ) ) {
1251                                                 global $wgParser;
1252                                                 $this->summary = "/* " .
1253                                                         $wgParser->stripSectionName(trim($matches[2])) .
1254                                                         " */ ";
1255                                         }
1256                                 }
1257                         }
1258
1259                         if ( $this->missingComment ) {
1260                                 $wgOut->wrapWikiMsg( '<div id="mw-missingcommenttext">$1</div>', 'missingcommenttext' );
1261                         }
1262
1263                         if ( $this->missingSummary && $this->section != 'new' ) {
1264                                 $wgOut->wrapWikiMsg( '<div id="mw-missingsummary">$1</div>', 'missingsummary' );
1265                         }
1266
1267                         if ( $this->missingSummary && $this->section == 'new' ) {
1268                                 $wgOut->wrapWikiMsg( '<div id="mw-missingcommentheader">$1</div>', 'missingcommentheader' );
1269                         }
1270
1271                         if ( $this->hookError !== '' ) {
1272                                 $wgOut->addWikiText( $this->hookError );
1273                         }
1274
1275                         if ( !$this->checkUnicodeCompliantBrowser() ) {
1276                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
1277                         }
1278                         if ( isset( $this->mArticle ) && isset( $this->mArticle->mRevision ) ) {
1279                         // Let sysop know that this will make private content public if saved
1280
1281                                 if ( !$this->mArticle->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1282                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n", 'rev-deleted-text-permission' );
1283                                 } else if ( $this->mArticle->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1284                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n", 'rev-deleted-text-view' );
1285                                 }
1286
1287                                 if ( !$this->mArticle->mRevision->isCurrent() ) {
1288                                         $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
1289                                         $cancelParams['oldid'] = $this->mArticle->mRevision->getId();
1290                                         $wgOut->addWikiMsg( 'editingold' );
1291                                 }
1292                         }
1293                 }
1294
1295                 if ( wfReadOnly() ) {
1296                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
1297                 } elseif ( $wgUser->isAnon() && $this->formtype != 'preview' ) {
1298                         $wgOut->wrapWikiMsg( '<div id="mw-anon-edit-warning">$1</div>', 'anoneditwarning' );
1299                 } else {
1300                         if ( $this->isCssJsSubpage ) {
1301                                 # Check the skin exists
1302                                 if ( !$this->isValidCssJsSubpage ) {
1303                                         $wgOut->addWikiMsg( 'userinvalidcssjstitle', $wgTitle->getSkinFromCssJsSubpage() );
1304                                 }
1305                                 if ( $this->formtype !== 'preview' ) {
1306                                         if ( $this->isCssSubpage )
1307                                                 $wgOut->addWikiMsg( 'usercssyoucanpreview' );
1308                                         if ( $this->isJsSubpage )
1309                                                 $wgOut->addWikiMsg( 'userjsyoucanpreview' );
1310                                 }
1311                         }
1312                 }
1313
1314                 $classes = array(); // Textarea CSS
1315                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1316                 } elseif ( $this->mTitle->isProtected( 'edit' ) ) {
1317                         # Is the title semi-protected?
1318                         if ( $this->mTitle->isSemiProtected() ) {
1319                                 $noticeMsg = 'semiprotectedpagewarning';
1320                                 $classes[] = 'mw-textarea-sprotected';
1321                         } else {
1322                                 # Then it must be protected based on static groups (regular)
1323                                 $noticeMsg = 'protectedpagewarning';
1324                                 $classes[] = 'mw-textarea-protected';
1325                         }
1326                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle->getPrefixedText(), '',
1327                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
1328                 }
1329                 if ( $this->mTitle->isCascadeProtected() ) {
1330                         # Is this page under cascading protection from some source pages?
1331                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
1332                         $notice = "<div class='mw-cascadeprotectedwarning'>$1\n";
1333                         $cascadeSourcesCount = count( $cascadeSources );
1334                         if ( $cascadeSourcesCount > 0 ) {
1335                                 # Explain, and list the titles responsible
1336                                 foreach( $cascadeSources as $page ) {
1337                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
1338                                 }
1339                         }
1340                         $notice .= '</div>';
1341                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
1342                 }
1343                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
1344                         $wgOut->wrapWikiMsg( '<div class="mw-titleprotectedwarning">$1</div>', 'titleprotectedwarning' );
1345                 }
1346
1347                 if ( $this->kblength === false ) {
1348                         $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
1349                 }
1350                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
1351                         $wgOut->addHTML( "<div class='error' id='mw-edit-longpageerror'>\n" );
1352                         $wgOut->addWikiMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) );
1353                         $wgOut->addHTML( "</div>\n" );
1354                 } elseif ( $this->kblength > 29 ) {
1355                         $wgOut->addHTML( "<div id='mw-edit-longpagewarning'>\n" );
1356                         $wgOut->addWikiMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) );
1357                         $wgOut->addHTML( "</div>\n" );
1358                 }
1359
1360                 $action = $wgTitle->escapeLocalURL( array( 'action' => $this->action ) );
1361
1362                 $summary = wfMsgExt( 'summary', 'parseinline' );
1363                 $subject = wfMsgExt( 'subject', 'parseinline' );
1364
1365                 $cancel = $sk->link(
1366                         $wgTitle,
1367                         wfMsgExt( 'cancel', array( 'parseinline' ) ),
1368                         array( 'id' => 'mw-editform-cancel' ),
1369                         $cancelParams,
1370                         array( 'known', 'noclasses' )
1371                 );
1372                 $separator = wfMsgExt( 'pipe-separator' , 'escapenoentities' );
1373                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ));
1374                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
1375                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
1376                         htmlspecialchars( wfMsg( 'newwindow' ) );
1377
1378                 global $wgRightsText;
1379                 if ( $wgRightsText ) {
1380                         $copywarnMsg = array( 'copyrightwarning',
1381                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
1382                                 $wgRightsText );
1383                 } else {
1384                         $copywarnMsg = array( 'copyrightwarning2',
1385                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
1386                 }
1387                 // Allow for site and per-namespace customization of contribution/copyright notice.
1388                 wfRunHooks( 'EditPageCopyrightWarning', array( $this->mTitle, &$copywarnMsg ) );
1389
1390                 if ( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
1391                         # prepare toolbar for edit buttons
1392                         $toolbar = EditPage::getEditToolbar();
1393                 } else {
1394                         $toolbar = '';
1395                 }
1396
1397
1398                 // activate checkboxes if user wants them to be always active
1399                 if ( !$this->preview && !$this->diff ) {
1400                         # Sort out the "watch" checkbox
1401                         if ( $wgUser->getOption( 'watchdefault' ) ) {
1402                                 # Watch all edits
1403                                 $this->watchthis = true;
1404                         } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1405                                 # Watch creations
1406                                 $this->watchthis = true;
1407                         } elseif ( $this->mTitle->userIsWatching() ) {
1408                                 # Already watched
1409                                 $this->watchthis = true;
1410                         }
1411
1412                         # May be overriden by request parameters
1413                         if( $wgRequest->getBool( 'watchthis' ) ) {
1414                                 $this->watchthis = true;
1415                         }
1416
1417                         if ( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
1418                 }
1419
1420                 $wgOut->addHTML( $this->editFormPageTop );
1421
1422                 if ( $wgUser->getOption( 'previewontop' ) ) {
1423                         $this->displayPreviewArea( $previewOutput, true );
1424                 }
1425
1426
1427                 $wgOut->addHTML( $this->editFormTextTop );
1428
1429                 # if this is a comment, show a subject line at the top, which is also the edit summary.
1430                 # Otherwise, show a summary field at the bottom
1431                 $summarytext = $wgContLang->recodeForEdit( $this->summary );
1432
1433                 # If a blank edit summary was previously provided, and the appropriate
1434                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1435                 # user being bounced back more than once in the event that a summary
1436                 # is not required.
1437                 #####
1438                 # For a bit more sophisticated detection of blank summaries, hash the
1439                 # automatic one and pass that in the hidden field wpAutoSummary.
1440                 $summaryhiddens =  '';
1441                 if ( $this->missingSummary ) $summaryhiddens .= Xml::hidden( 'wpIgnoreBlankSummary', true );
1442                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1443                 $summaryhiddens .= Xml::hidden( 'wpAutoSummary', $autosumm );
1444                 if ( $this->section == 'new' ) {
1445                         $commentsubject = '';
1446                         if ( !$wgRequest->getBool( 'nosummary' ) ) {
1447                                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
1448                                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
1449
1450                                 $commentsubject =
1451                                         Xml::tags( 'label', array( 'for' => 'wpSummary' ), $subject );
1452                                 $commentsubject =
1453                                         Xml::tags( 'span', array( 'class' => $summaryClass, 'id' => "wpSummaryLabel" ),
1454                                                 $commentsubject );
1455                                 $commentsubject .= '&nbsp;';
1456                                 $commentsubject .= Xml::input( 'wpSummary',
1457                                                                         60,
1458                                                                         $summarytext,
1459                                                                         array(
1460                                                                                 'id' => 'wpSummary',
1461                                                                                 'maxlength' => '200',
1462                                                                                 'tabindex' => '1'
1463                                                                         ) );
1464                         } else {
1465                                 $summaryhiddens .= Xml::hidden( 'wpIgnoreBlankSummary', true ); # bug 18699
1466                         }
1467                         $editsummary = "<div class='editOptions'>\n";
1468                         global $wgParser;
1469                         $formattedSummary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $this->summary ) );
1470                         $subjectpreview = $summarytext && ( $this->preview || $this->diff ) ?
1471                                 "<div class=\"mw-summary-preview\">". wfMsgExt('subject-preview', 'parseinline') . $sk->commentBlock( $formattedSummary, $this->mTitle, true )."</div>\n" : '';
1472                         $summarypreview = '';
1473                 } else {
1474                         $commentsubject = '';
1475
1476                         # Add a class if 'missingsummary' is triggered to allow styling of the summary line
1477                         $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
1478
1479                         $editsummary = Xml::tags( 'label', array( 'for' => 'wpSummary' ), $summary );
1480                         $editsummary = Xml::tags( 'span',  array( 'class' => $summaryClass, 'id' => "wpSummaryLabel" ),
1481                                         $editsummary ) . ' ';
1482
1483                         $editsummary .= Xml::input( 'wpSummary',
1484                                 60,
1485                                 $summarytext,
1486                                 array(
1487                                         'id' => 'wpSummary',
1488                                         'maxlength' => '200',
1489                                         'tabindex' => '1'
1490                                 ) );
1491
1492                         // No idea where this is closed.
1493                         $editsummary = Xml::openElement( 'div', array( 'class' => 'editOptions' ) )
1494                                                         . $editsummary . '<br/>';
1495
1496                         $summarypreview = '';
1497                         if ( $summarytext && ( $this->preview || $this->diff ) ) {
1498                                 $summarypreview =
1499                                         Xml::tags( 'div',
1500                                                 array( 'class' => 'mw-summary-preview' ),
1501                                                 wfMsgExt( 'summary-preview', 'parseinline' ) .
1502                                                         $sk->commentBlock( $this->summary, $this->mTitle )
1503                                         );
1504                         }
1505                         $subjectpreview = '';
1506                 }
1507                 $commentsubject .= $summaryhiddens;
1508
1509                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
1510                 if ( !$this->preview && !$this->diff ) {
1511                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
1512                 }
1513                 $templates = $this->getTemplates();
1514                 $formattedtemplates = $sk->formatTemplates( $templates, $this->preview, $this->section != '');
1515
1516                 $hiddencats = $this->mArticle->getHiddenCategories();
1517                 $formattedhiddencats = $sk->formatHiddenCategories( $hiddencats );
1518
1519                 global $wgUseMetadataEdit ;
1520                 if ( $wgUseMetadataEdit ) {
1521                         $metadata = $this->mMetaData ;
1522                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
1523                         $top = wfMsgWikiHtml( 'metadata_help' );
1524                         /* ToDo: Replace with clean code */
1525                         $ew = $wgUser->getOption( 'editwidth' );
1526                         if ( $ew ) $ew = " style=\"width:100%\"";
1527                         else $ew = '';
1528                         $cols = $wgUser->getIntOption( 'cols' );
1529                         /* /ToDo */
1530                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
1531                 }
1532                 else $metadata = "" ;
1533
1534                 $recreate = '';
1535                 if ( $this->wasDeletedSinceLastEdit() ) {
1536                         if ( 'save' != $this->formtype ) {
1537                                 $wgOut->wrapWikiMsg(
1538                                         "<div class='error mw-deleted-while-editing'>\n$1</div>",
1539                                         'deletedwhileediting' );
1540                         } else {
1541                                 // Hide the toolbar and edit area, user can click preview to get it back
1542                                 // Add an confirmation checkbox and explanation.
1543                                 $toolbar = '';
1544                                 $recreate = '<div class="mw-confirm-recreate">' .
1545                                                 $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ) ) .
1546                                                 Xml::checkLabel( wfMsg( 'recreate' ), 'wpRecreate', 'wpRecreate', false,
1547                                                         array( 'title' => $sk->titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
1548                                                 ) . '</div>';
1549                         }
1550                 }
1551
1552                 $tabindex = 2;
1553
1554                 $checkboxes = $this->getCheckboxes( $tabindex, $sk,
1555                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
1556
1557                 $checkboxhtml = implode( $checkboxes, "\n" );
1558
1559                 $buttons = $this->getEditButtons( $tabindex );
1560                 $buttonshtml = implode( $buttons, "\n" );
1561
1562                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
1563                         ? '' : Xml::hidden( 'safemode', '1' );
1564
1565                 $wgOut->addHTML( <<<END
1566 {$toolbar}
1567 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1568 END
1569 );
1570
1571                 if ( is_callable( $formCallback ) ) {
1572                         call_user_func_array( $formCallback, array( &$wgOut ) );
1573                 }
1574
1575                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1576
1577                 // Put these up at the top to ensure they aren't lost on early form submission
1578                 $this->showFormBeforeText();
1579
1580                 $wgOut->addHTML( <<<END
1581 {$recreate}
1582 {$commentsubject}
1583 {$subjectpreview}
1584 {$this->editFormTextBeforeContent}
1585 END
1586 );
1587                 $this->showTextbox1( $classes );
1588
1589                 $wgOut->wrapWikiMsg( "<div id=\"editpage-copywarn\">\n$1\n</div>", $copywarnMsg );
1590                 $wgOut->addHTML( <<<END
1591 {$this->editFormTextAfterWarn}
1592 {$metadata}
1593 {$editsummary}
1594 {$summarypreview}
1595 {$checkboxhtml}
1596 {$safemodehtml}
1597 END
1598 );
1599
1600                 $wgOut->addHTML(
1601 "<div class='editButtons'>
1602 {$buttonshtml}
1603         <span class='editHelp'>{$cancel}{$separator}{$edithelp}</span>
1604 </div><!-- editButtons -->
1605 </div><!-- editOptions -->");
1606
1607                 /**
1608                  * To make it harder for someone to slip a user a page
1609                  * which submits an edit form to the wiki without their
1610                  * knowledge, a random token is associated with the login
1611                  * session. If it's not passed back with the submission,
1612                  * we won't save the page, or render user JavaScript and
1613                  * CSS previews.
1614                  *
1615                  * For anon editors, who may not have a session, we just
1616                  * include the constant suffix to prevent editing from
1617                  * broken text-mangling proxies.
1618                  */
1619                 $token = htmlspecialchars( $wgUser->editToken() );
1620                 $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
1621
1622                 $this->showTosSummary();
1623                 $this->showEditTools();
1624
1625                 $wgOut->addHTML( <<<END
1626 {$this->editFormTextAfterTools}
1627 <div class='templatesUsed'>
1628 {$formattedtemplates}
1629 </div>
1630 <div class='hiddencats'>
1631 {$formattedhiddencats}
1632 </div>
1633 END
1634 );
1635
1636                 if ( $this->isConflict && wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
1637                         $wgOut->wrapWikiMsg( '==$1==', "yourdiff" );
1638
1639                         $de = new DifferenceEngine( $this->mTitle );
1640                         $de->setText( $this->textbox2, $this->textbox1 );
1641                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1642
1643                         $wgOut->wrapWikiMsg( '==$1==', "yourtext" );
1644                         $this->showTextbox2();
1645                 }
1646                 $wgOut->addHTML( $this->editFormTextBottom );
1647                 $wgOut->addHTML( "</form>\n" );
1648                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1649                         $this->displayPreviewArea( $previewOutput, false );
1650                 }
1651
1652                 wfProfileOut( $fname );
1653         }
1654
1655         protected function showFormBeforeText() {
1656                 global $wgOut;
1657                 $wgOut->addHTML( "
1658 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
1659 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
1660 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
1661 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
1662         }
1663
1664         protected function showTextbox1( $classes ) {
1665                 $attribs = array( 'tabindex' => 1 );
1666
1667                 if ( $this->wasDeletedSinceLastEdit() )
1668                         $attribs['type'] = 'hidden';
1669                 if ( !empty($classes) )
1670                         $attribs['class'] = implode(' ',$classes);
1671
1672                 $this->showTextbox( $this->textbox1, 'wpTextbox1', $attribs );
1673         }
1674
1675         protected function showTextbox2() {
1676                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6 ) );
1677         }
1678
1679         protected function showTextbox( $content, $name, $attribs = array() ) {
1680                 global $wgOut, $wgUser;
1681
1682                 $wikitext = $this->safeUnicodeOutput( $content );
1683                 if ( $wikitext !== '' ) {
1684                         // Ensure there's a newline at the end, otherwise adding lines
1685                         // is awkward.
1686                         // But don't add a newline if the ext is empty, or Firefox in XHTML
1687                         // mode will show an extra newline. A bit annoying.
1688                         $wikitext .= "\n";
1689                 }
1690
1691                 $attribs['accesskey'] = ',';
1692                 $attribs['id'] = $name;
1693
1694                 if ( $wgUser->getOption( 'editwidth' ) )
1695                         $attribs['style'] = 'width: 100%';
1696
1697                 $wgOut->addHTML( Xml::textarea(
1698                         $name,
1699                         $wikitext,
1700                         $wgUser->getIntOption( 'cols' ), $wgUser->getIntOption( 'rows' ),
1701                         $attribs ) );
1702         }
1703
1704         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
1705                 global $wgOut;
1706                 $classes = array();
1707                 if ( $isOnTop )
1708                         $classes[] = 'ontop';
1709
1710                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
1711
1712                 if ( $this->formtype != 'preview' )
1713                         $attribs['style'] = 'display: none;';
1714
1715                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
1716
1717                 if ( $this->formtype == 'preview' ) {
1718                         $this->showPreview( $previewOutput );
1719                 }
1720
1721                 $wgOut->addHTML( '</div>' );
1722
1723                 if ( $this->formtype == 'diff') {
1724                         $this->showDiff();
1725                 }
1726         }
1727
1728         /**
1729          * Append preview output to $wgOut.
1730          * Includes category rendering if this is a category page.
1731          *
1732          * @param string $text The HTML to be output for the preview.
1733          */
1734         protected function showPreview( $text ) {
1735                 global $wgOut;
1736                 if ( $this->mTitle->getNamespace() == NS_CATEGORY) {
1737                         $this->mArticle->openShowCategory();
1738                 }
1739                 # This hook seems slightly odd here, but makes things more
1740                 # consistent for extensions.
1741                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
1742                 $wgOut->addHTML( $text );
1743                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
1744                         $this->mArticle->closeShowCategory();
1745                 }
1746         }
1747
1748         /**
1749          * Live Preview lets us fetch rendered preview page content and
1750          * add it to the page without refreshing the whole page.
1751          * If not supported by the browser it will fall through to the normal form
1752          * submission method.
1753          *
1754          * This function outputs a script tag to support live preview, and
1755          * returns an onclick handler which should be added to the attributes
1756          * of the preview button
1757          */
1758         function doLivePreviewScript() {
1759                 global $wgOut, $wgTitle;
1760                 $wgOut->addScriptFile( 'preview.js' );
1761                 return "";
1762         }
1763
1764         protected function showTosSummary() {
1765                 $msg = 'editpage-tos-summary';
1766                 // Give a chance for site and per-namespace customizations of
1767                 // terms of service summary link that might exist separately
1768                 // from the copyright notice.
1769                 //
1770                 // This will display between the save button and the edit tools,
1771                 // so should remain short!
1772                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
1773                 $text = wfMsg( $msg );
1774                 if( !wfEmptyMsg( $msg, $text ) && $text !== '-' ) {
1775                         global $wgOut;
1776                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
1777                         $wgOut->addWikiMsgArray( $msg, array() );
1778                         $wgOut->addHTML( '</div>' );
1779                 }
1780         }
1781
1782         protected function showEditTools() {
1783                 global $wgOut;
1784                 $wgOut->addHTML( '<div class="mw-editTools">' );
1785                 $wgOut->addWikiMsgArray( 'edittools', array(), array( 'content' ) );
1786                 $wgOut->addHTML( '</div>' );
1787         }
1788
1789         protected function getLastDelete() {
1790                 $dbr = wfGetDB( DB_SLAVE );
1791                 $data = $dbr->selectRow(
1792                         array( 'logging', 'user' ),
1793                         array( 'log_type',
1794                                'log_action',
1795                                'log_timestamp',
1796                                'log_user',
1797                                'log_namespace',
1798                                'log_title',
1799                                'log_comment',
1800                                'log_params',
1801                                    'log_deleted',
1802                                'user_name' ),
1803                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1804                                'log_title' => $this->mTitle->getDBkey(),
1805                                'log_type' => 'delete',
1806                                'log_action' => 'delete',
1807                                'user_id=log_user' ),
1808                         __METHOD__,
1809                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
1810                 );
1811                 // Quick paranoid permission checks...
1812                 if( is_object($data) ) {
1813                         if( $data->log_deleted & LogPage::DELETED_USER )
1814                                 $data->user_name = wfMsgHtml('rev-deleted-user');
1815                         if( $data->log_deleted & LogPage::DELETED_COMMENT )
1816                                 $data->log_comment = wfMsgHtml('rev-deleted-comment');
1817                 }
1818                 return $data;
1819         }
1820
1821         /**
1822          * Get the rendered text for previewing.
1823          * @return string
1824          */
1825         function getPreviewText() {
1826                 global $wgOut, $wgUser, $wgTitle, $wgParser, $wgLang, $wgContLang, $wgMessageCache;
1827
1828                 wfProfileIn( __METHOD__ );
1829
1830                 if ( $this->mTriedSave && !$this->mTokenOk ) {
1831                         if ( $this->mTokenOkExceptSuffix ) {
1832                                 $note = wfMsg( 'token_suffix_mismatch' );
1833                         } else {
1834                                 $note = wfMsg( 'session_fail_preview' );
1835                         }
1836                 } else {
1837                         $note = wfMsg( 'previewnote' );
1838                 }
1839
1840                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1841                 $parserOptions->setEditSection( false );
1842                 $parserOptions->setIsPreview( true );
1843                 $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
1844
1845                 global $wgRawHtml;
1846                 if ( $wgRawHtml && !$this->mTokenOk ) {
1847                         // Could be an offsite preview attempt. This is very unsafe if
1848                         // HTML is enabled, as it could be an attack.
1849                         return $wgOut->parse( "<div class='previewnote'>" .
1850                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1851                 }
1852
1853                 # don't parse user css/js, show message about preview
1854                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1855
1856                 if ( $this->isCssJsSubpage ) {
1857                         if (preg_match("/\\.css$/", $this->mTitle->getText() ) ) {
1858                                 $previewtext = wfMsg('usercsspreview');
1859                         } else if (preg_match("/\\.js$/", $this->mTitle->getText() ) ) {
1860                                 $previewtext = wfMsg('userjspreview');
1861                         }
1862                         $parserOptions->setTidy(true);
1863                         $parserOutput = $wgParser->parse( $previewtext, $this->mTitle, $parserOptions );
1864                         $previewHTML = $parserOutput->mText;
1865                 } elseif ( $rt = Title::newFromRedirectArray( $this->textbox1 ) ) {
1866                         $previewHTML = $this->mArticle->viewRedirect( $rt, false );
1867                 } else {
1868                         $toparse = $this->textbox1;
1869
1870                         # If we're adding a comment, we need to show the
1871                         # summary as the headline
1872                         if ( $this->section=="new" && $this->summary!="" ) {
1873                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1874                         }
1875
1876                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData;
1877
1878                         // Parse mediawiki messages with correct target language
1879                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1880                                 list( /* $unused */, $lang ) = $wgMessageCache->figureMessage( $this->mTitle->getText() );
1881                                 $obj = wfGetLangObj( $lang );
1882                                 $parserOptions->setTargetLanguage( $obj );
1883                         }
1884
1885
1886                         $parserOptions->setTidy(true);
1887                         $parserOptions->enableLimitReport();
1888                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ),
1889                                         $this->mTitle, $parserOptions );
1890
1891                         $previewHTML = $parserOutput->getText();
1892                         $this->mParserOutput = $parserOutput;
1893                         $wgOut->addParserOutputNoText( $parserOutput );
1894
1895                         if ( count( $parserOutput->getWarnings() ) ) {
1896                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
1897                         }
1898                 }
1899
1900                 if( $this->isConflict ) {
1901                         $conflict = '<h2 id="mw-previewconflict">' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1902                 } else {
1903                         $conflict = '<hr />';
1904                 }
1905
1906                 $previewhead = "<div class='previewnote'>\n" .
1907                         '<h2 id="mw-previewheader">' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>" .
1908                         $wgOut->parse( $note ) . $conflict . "</div>\n";
1909
1910                 wfProfileOut( __METHOD__ );
1911                 return $previewhead . $previewHTML;
1912         }
1913
1914         function getTemplates() {
1915                 if ( $this->preview || $this->section != '' ) {
1916                         $templates = array();
1917                         if ( !isset($this->mParserOutput) ) return $templates;
1918                         foreach( $this->mParserOutput->getTemplates() as $ns => $template) {
1919                                 foreach( array_keys( $template ) as $dbk ) {
1920                                         $templates[] = Title::makeTitle($ns, $dbk);
1921                                 }
1922                         }
1923                         return $templates;
1924                 } else {
1925                         return $this->mArticle->getUsedTemplates();
1926                 }
1927         }
1928
1929         /**
1930          * Call the stock "user is blocked" page
1931          */
1932         function blockedPage() {
1933                 global $wgOut, $wgUser;
1934                 $wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
1935
1936                 # If the user made changes, preserve them when showing the markup
1937                 # (This happens when a user is blocked during edit, for instance)
1938                 $first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
1939                 if ( $first ) {
1940                         $source = $this->mTitle->exists() ? $this->getContent() : false;
1941                 } else {
1942                         $source = $this->textbox1;
1943                 }
1944
1945                 # Spit out the source or the user's modified version
1946                 if ( $source !== false ) {
1947                         $rows = $wgUser->getIntOption( 'rows' );
1948                         $cols = $wgUser->getIntOption( 'cols' );
1949                         $attribs = array( 'id' => 'wpTextbox1', 'name' => 'wpTextbox1', 'cols' => $cols, 'rows' => $rows, 'readonly' => 'readonly' );
1950                         $wgOut->addHTML( '<hr />' );
1951                         $wgOut->addWikiMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() );
1952                         # Why we don't use Xml::element here?
1953                         # Is it because if $source is '', it returns <textarea />?
1954                         $wgOut->addHTML( Xml::openElement( 'textarea', $attribs ) . htmlspecialchars( $source ) . Xml::closeElement( 'textarea' ) );
1955                 }
1956         }
1957
1958         /**
1959          * Produce the stock "please login to edit pages" page
1960          */
1961         function userNotLoggedInPage() {
1962                 global $wgUser, $wgOut, $wgTitle;
1963                 $skin = $wgUser->getSkin();
1964
1965                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1966                 $loginLink = $skin->link(
1967                         $loginTitle,
1968                         wfMsgHtml( 'loginreqlink' ),
1969                         array(),
1970                         array( 'returnto' => $wgTitle->getPrefixedText() ),
1971                         array( 'known', 'noclasses' )
1972                 );
1973
1974                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1975                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1976                 $wgOut->setArticleRelated( false );
1977
1978                 $wgOut->addHTML( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
1979                 $wgOut->returnToMain( false, $wgTitle );
1980         }
1981
1982         /**
1983          * Creates a basic error page which informs the user that
1984          * they have attempted to edit a nonexistent section.
1985          */
1986         function noSuchSectionPage() {
1987                 global $wgOut, $wgTitle;
1988
1989                 $wgOut->setPageTitle( wfMsg( 'nosuchsectiontitle' ) );
1990                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1991                 $wgOut->setArticleRelated( false );
1992
1993                 $wgOut->addWikiMsg( 'nosuchsectiontext', $this->section );
1994                 $wgOut->returnToMain( false, $wgTitle );
1995         }
1996
1997         /**
1998          * Produce the stock "your edit contains spam" page
1999          *
2000          * @param $match Text which triggered one or more filters
2001          */
2002         function spamPage( $match = false ) {
2003                 global $wgOut, $wgTitle;
2004
2005                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
2006                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2007                 $wgOut->setArticleRelated( false );
2008
2009                 $wgOut->addHTML( '<div id="spamprotected">' );
2010                 $wgOut->addWikiMsg( 'spamprotectiontext' );
2011                 if ( $match )
2012                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
2013                 $wgOut->addHTML( '</div>' );
2014
2015                 $wgOut->returnToMain( false, $wgTitle );
2016         }
2017
2018         /**
2019          * @private
2020          * @todo document
2021          */
2022         function mergeChangesInto( &$editText ){
2023                 $fname = 'EditPage::mergeChangesInto';
2024                 wfProfileIn( $fname );
2025
2026                 $db = wfGetDB( DB_MASTER );
2027
2028                 // This is the revision the editor started from
2029                 $baseRevision = $this->getBaseRevision();
2030                 if ( is_null( $baseRevision ) ) {
2031                         wfProfileOut( $fname );
2032                         return false;
2033                 }
2034                 $baseText = $baseRevision->getText();
2035
2036                 // The current state, we want to merge updates into it
2037                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2038                 if ( is_null( $currentRevision ) ) {
2039                         wfProfileOut( $fname );
2040                         return false;
2041                 }
2042                 $currentText = $currentRevision->getText();
2043
2044                 $result = '';
2045                 if ( wfMerge( $baseText, $editText, $currentText, $result ) ) {
2046                         $editText = $result;
2047                         wfProfileOut( $fname );
2048                         return true;
2049                 } else {
2050                         wfProfileOut( $fname );
2051                         return false;
2052                 }
2053         }
2054
2055         /**
2056          * Check if the browser is on a blacklist of user-agents known to
2057          * mangle UTF-8 data on form submission. Returns true if Unicode
2058          * should make it through, false if it's known to be a problem.
2059          * @return bool
2060          * @private
2061          */
2062         function checkUnicodeCompliantBrowser() {
2063                 global $wgBrowserBlackList;
2064                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
2065                         // No User-Agent header sent? Trust it by default...
2066                         return true;
2067                 }
2068                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
2069                 foreach ( $wgBrowserBlackList as $browser ) {
2070                         if ( preg_match($browser, $currentbrowser) ) {
2071                                 return false;
2072                         }
2073                 }
2074                 return true;
2075         }
2076
2077         /**
2078          * @deprecated use $wgParser->stripSectionName()
2079          */
2080         function pseudoParseSectionAnchor( $text ) {
2081                 global $wgParser;
2082                 return $wgParser->stripSectionName( $text );
2083         }
2084
2085         /**
2086          * Format an anchor fragment as it would appear for a given section name
2087          * @param string $text
2088          * @return string
2089          * @private
2090          */
2091         function sectionAnchor( $text ) {
2092                 global $wgParser;
2093                 return $wgParser->guessSectionNameFromWikiText( $text );
2094         }
2095
2096         /**
2097          * Shows a bulletin board style toolbar for common editing functions.
2098          * It can be disabled in the user preferences.
2099          * The necessary JavaScript code can be found in skins/common/edit.js.
2100          *
2101          * @return string
2102          */
2103         static function getEditToolbar() {
2104                 global $wgStylePath, $wgContLang, $wgLang;
2105
2106                 /**
2107                  * toolarray an array of arrays which each include the filename of
2108                  * the button image (without path), the opening tag, the closing tag,
2109                  * and optionally a sample text that is inserted between the two when no
2110                  * selection is highlighted.
2111                  * The tip text is shown when the user moves the mouse over the button.
2112                  *
2113                  * Already here are accesskeys (key), which are not used yet until someone
2114                  * can figure out a way to make them work in IE. However, we should make
2115                  * sure these keys are not defined on the edit page.
2116                  */
2117                 $toolarray = array(
2118                         array(
2119                                 'image'  => $wgLang->getImageFile('button-bold'),
2120                                 'id'     => 'mw-editbutton-bold',
2121                                 'open'   => '\'\'\'',
2122                                 'close'  => '\'\'\'',
2123                                 'sample' => wfMsg('bold_sample'),
2124                                 'tip'    => wfMsg('bold_tip'),
2125                                 'key'    => 'B'
2126                         ),
2127                         array(
2128                                 'image'  => $wgLang->getImageFile('button-italic'),
2129                                 'id'     => 'mw-editbutton-italic',
2130                                 'open'   => '\'\'',
2131                                 'close'  => '\'\'',
2132                                 'sample' => wfMsg('italic_sample'),
2133                                 'tip'    => wfMsg('italic_tip'),
2134                                 'key'    => 'I'
2135                         ),
2136                         array(
2137                                 'image'  => $wgLang->getImageFile('button-link'),
2138                                 'id'     => 'mw-editbutton-link',
2139                                 'open'   => '[[',
2140                                 'close'  => ']]',
2141                                 'sample' => wfMsg('link_sample'),
2142                                 'tip'    => wfMsg('link_tip'),
2143                                 'key'    => 'L'
2144                         ),
2145                         array(
2146                                 'image'  => $wgLang->getImageFile('button-extlink'),
2147                                 'id'     => 'mw-editbutton-extlink',
2148                                 'open'   => '[',
2149                                 'close'  => ']',
2150                                 'sample' => wfMsg('extlink_sample'),
2151                                 'tip'    => wfMsg('extlink_tip'),
2152                                 'key'    => 'X'
2153                         ),
2154                         array(
2155                                 'image'  => $wgLang->getImageFile('button-headline'),
2156                                 'id'     => 'mw-editbutton-headline',
2157                                 'open'   => "\n== ",
2158                                 'close'  => " ==\n",
2159                                 'sample' => wfMsg('headline_sample'),
2160                                 'tip'    => wfMsg('headline_tip'),
2161                                 'key'    => 'H'
2162                         ),
2163                         array(
2164                                 'image'  => $wgLang->getImageFile('button-image'),
2165                                 'id'     => 'mw-editbutton-image',
2166                                 'open'   => '[['.$wgContLang->getNsText(NS_FILE).':',
2167                                 'close'  => ']]',
2168                                 'sample' => wfMsg('image_sample'),
2169                                 'tip'    => wfMsg('image_tip'),
2170                                 'key'    => 'D'
2171                         ),
2172                         array(
2173                                 'image'  => $wgLang->getImageFile('button-media'),
2174                                 'id'     => 'mw-editbutton-media',
2175                                 'open'   => '[['.$wgContLang->getNsText(NS_MEDIA).':',
2176                                 'close'  => ']]',
2177                                 'sample' => wfMsg('media_sample'),
2178                                 'tip'    => wfMsg('media_tip'),
2179                                 'key'    => 'M'
2180                         ),
2181                         array(
2182                                 'image'  => $wgLang->getImageFile('button-math'),
2183                                 'id'     => 'mw-editbutton-math',
2184                                 'open'   => "<math>",
2185                                 'close'  => "</math>",
2186                                 'sample' => wfMsg('math_sample'),
2187                                 'tip'    => wfMsg('math_tip'),
2188                                 'key'    => 'C'
2189                         ),
2190                         array(
2191                                 'image'  => $wgLang->getImageFile('button-nowiki'),
2192                                 'id'     => 'mw-editbutton-nowiki',
2193                                 'open'   => "<nowiki>",
2194                                 'close'  => "</nowiki>",
2195                                 'sample' => wfMsg('nowiki_sample'),
2196                                 'tip'    => wfMsg('nowiki_tip'),
2197                                 'key'    => 'N'
2198                         ),
2199                         array(
2200                                 'image'  => $wgLang->getImageFile('button-sig'),
2201                                 'id'     => 'mw-editbutton-signature',
2202                                 'open'   => '--~~~~',
2203                                 'close'  => '',
2204                                 'sample' => '',
2205                                 'tip'    => wfMsg('sig_tip'),
2206                                 'key'    => 'Y'
2207                         ),
2208                         array(
2209                                 'image'  => $wgLang->getImageFile('button-hr'),
2210                                 'id'     => 'mw-editbutton-hr',
2211                                 'open'   => "\n----\n",
2212                                 'close'  => '',
2213                                 'sample' => '',
2214                                 'tip'    => wfMsg('hr_tip'),
2215                                 'key'    => 'R'
2216                         )
2217                 );
2218                 $toolbar = "<div id='toolbar'>\n";
2219
2220                 $script = '';
2221                 foreach ( $toolarray as $tool ) {
2222                         $params = array(
2223                                 $image = $wgStylePath.'/common/images/'.$tool['image'],
2224                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
2225                                 // Older browsers show a "speedtip" type message only for ALT.
2226                                 // Ideally these should be different, realistically they
2227                                 // probably don't need to be.
2228                                 $tip = $tool['tip'],
2229                                 $open = $tool['open'],
2230                                 $close = $tool['close'],
2231                                 $sample = $tool['sample'],
2232                                 $cssId = $tool['id'],
2233                         );
2234
2235                         $paramList = implode( ',',
2236                                 array_map( array( 'Xml', 'encodeJsVar' ), $params ) );
2237                         $script .= "addButton($paramList);\n";
2238                 }
2239                 $toolbar .= Html::inlineScript( "\n$script\n" );
2240
2241                 $toolbar .= "\n</div>";
2242
2243                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
2244
2245                 return $toolbar;
2246         }
2247
2248         /**
2249          * Returns an array of html code of the following checkboxes:
2250          * minor and watch
2251          *
2252          * @param $tabindex Current tabindex
2253          * @param $skin Skin object
2254          * @param $checked Array of checkbox => bool, where bool indicates the checked
2255          *                 status of the checkbox
2256          *
2257          * @return array
2258          */
2259         public function getCheckboxes( &$tabindex, $skin, $checked ) {
2260                 global $wgUser;
2261
2262                 $checkboxes = array();
2263
2264                 $checkboxes['minor'] = '';
2265                 $minorLabel = wfMsgExt('minoredit', array('parseinline'));
2266                 if ( $wgUser->isAllowed('minoredit') ) {
2267                         $attribs = array(
2268                                 'tabindex'  => ++$tabindex,
2269                                 'accesskey' => wfMsg( 'accesskey-minoredit' ),
2270                                 'id'        => 'wpMinoredit',
2271                         );
2272                         $checkboxes['minor'] =
2273                                 Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
2274                                 "&nbsp;<label for='wpMinoredit'".$skin->tooltip('minoredit', 'withaccess').">{$minorLabel}</label>";
2275                 }
2276
2277                 $watchLabel = wfMsgExt('watchthis', array('parseinline'));
2278                 $checkboxes['watch'] = '';
2279                 if ( $wgUser->isLoggedIn() ) {
2280                         $attribs = array(
2281                                 'tabindex'  => ++$tabindex,
2282                                 'accesskey' => wfMsg( 'accesskey-watch' ),
2283                                 'id'        => 'wpWatchthis',
2284                         );
2285                         $checkboxes['watch'] =
2286                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
2287                                 "&nbsp;<label for='wpWatchthis'".$skin->tooltip('watch', 'withaccess').">{$watchLabel}</label>";
2288                 }
2289                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
2290                 return $checkboxes;
2291         }
2292
2293         /**
2294          * Returns an array of html code of the following buttons:
2295          * save, diff, preview and live
2296          *
2297          * @param $tabindex Current tabindex
2298          *
2299          * @return array
2300          */
2301         public function getEditButtons(&$tabindex) {
2302                 $buttons = array();
2303
2304                 $temp = array(
2305                         'id'        => 'wpSave',
2306                         'name'      => 'wpSave',
2307                         'type'      => 'submit',
2308                         'tabindex'  => ++$tabindex,
2309                         'value'     => wfMsg('savearticle'),
2310                         'accesskey' => wfMsg('accesskey-save'),
2311                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
2312                 );
2313                 $buttons['save'] = Xml::element('input', $temp, '');
2314
2315                 ++$tabindex; // use the same for preview and live preview
2316                 if ( $this->useLivePreview() ) {
2317                         $this->doLivePreviewScript(); // Add to output
2318
2319                         $temp = array(
2320                                 'id'        => 'wpPreview',
2321                                 'name'      => 'wpPreview',
2322                                 'type'      => 'submit',
2323                                 'tabindex'  => $tabindex,
2324                                 'value'     => wfMsg('showpreview'),
2325                                 'accesskey' => '',
2326                                 'title'     => wfMsg( 'tooltip-preview' ).' ['.wfMsg( 'accesskey-preview' ).']',
2327                         );
2328                         $buttons['preview'] = Xml::element('input', $temp, '');
2329
2330                         $temp = array(
2331                                 'id'        => 'wpLivePreview',
2332                                 'name'      => 'wpLivePreview',
2333                                 'type'      => 'submit',
2334                                 'tabindex'  => $tabindex,
2335                                 'value'     => wfMsg('showlivepreview'),
2336                                 'accesskey' => wfMsg('accesskey-preview'),
2337                                 'title'     => '',
2338                                 'style'     => 'display: none;',
2339                         );
2340
2341                         $buttons['live'] = Xml::element('input', $temp, '');
2342                 } else {
2343                         $temp = array(
2344                                 'id'        => 'wpPreview',
2345                                 'name'      => 'wpPreview',
2346                                 'type'      => 'submit',
2347                                 'tabindex'  => $tabindex,
2348                                 'value'     => wfMsg('showpreview'),
2349                                 'accesskey' => wfMsg('accesskey-preview'),
2350                                 'title'     => wfMsg( 'tooltip-preview' ).' ['.wfMsg( 'accesskey-preview' ).']',
2351                         );
2352                         $buttons['preview'] = Xml::element('input', $temp, '');
2353                         $buttons['live'] = '';
2354                 }
2355
2356                 $temp = array(
2357                         'id'        => 'wpDiff',
2358                         'name'      => 'wpDiff',
2359                         'type'      => 'submit',
2360                         'tabindex'  => ++$tabindex,
2361                         'value'     => wfMsg('showdiff'),
2362                         'accesskey' => wfMsg('accesskey-diff'),
2363                         'title'     => wfMsg( 'tooltip-diff' ).' ['.wfMsg( 'accesskey-diff' ).']',
2364                 );
2365                 $buttons['diff'] = Xml::element('input', $temp, '');
2366
2367                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
2368                 return $buttons;
2369         }
2370
2371         /**
2372          * Whether to use live preview for this page
2373          * This disables live preview when editing css/js user subpages so that the
2374          * user can preview them (bug 3421)
2375          *
2376          * @return Boolean
2377          */
2378         public function useLivePreview() {
2379                 global $wgLivePreview, $wgUser;
2380
2381                 return $wgLivePreview && $wgUser->getOption( 'uselivepreview' ) &&
2382                         !( ( $this->mTitle->isCssSubpage() && $this->mTitle->userCanEditCssSubpage() ) ||
2383                         ( $this->mTitle->isJsSubpage() && $this->mTitle->userCanEditCssSubpage() ) );
2384         }
2385
2386         /**
2387          * Output preview text only. This can be sucked into the edit page
2388          * via JavaScript, and saves the server time rendering the skin as
2389          * well as theoretically being more robust on the client (doesn't
2390          * disturb the edit box's undo history, won't eat your text on
2391          * failure, etc).
2392          *
2393          * @todo This doesn't include category or interlanguage links.
2394          *       Would need to enhance it a bit, <s>maybe wrap them in XML
2395          *       or something...</s> that might also require more skin
2396          *       initialization, so check whether that's a problem.
2397          */
2398         function livePreview() {
2399                 global $wgOut;
2400                 $wgOut->disable();
2401                 header( 'Content-type: text/xml; charset=utf-8' );
2402                 header( 'Cache-control: no-cache' );
2403
2404                 $previewText = $this->getPreviewText();
2405                 #$categories = $skin->getCategoryLinks();
2406
2407                 $s =
2408                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
2409                 Xml::tags( 'livepreview', null,
2410                         Xml::element( 'preview', null, $previewText )
2411                         #.      Xml::element( 'category', null, $categories )
2412                 );
2413                 echo $s;
2414         }
2415
2416
2417         /**
2418          * Get a diff between the current contents of the edit box and the
2419          * version of the page we're editing from.
2420          *
2421          * If this is a section edit, we'll replace the section as for final
2422          * save and then make a comparison.
2423          */
2424         function showDiff() {
2425                 $oldtext = $this->mArticle->fetchContent();
2426                 $newtext = $this->mArticle->replaceSection(
2427                         $this->section, $this->textbox1, $this->summary, $this->edittime );
2428                 $newtext = $this->mArticle->preSaveTransform( $newtext );
2429                 $oldtitle = wfMsgExt( 'currentrev', array('parseinline') );
2430                 $newtitle = wfMsgExt( 'yourtext', array('parseinline') );
2431                 if ( $oldtext !== false  || $newtext != '' ) {
2432                         $de = new DifferenceEngine( $this->mTitle );
2433                         $de->setText( $oldtext, $newtext );
2434                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2435                         $de->showDiffStyle();
2436                 } else {
2437                         $difftext = '';
2438                 }
2439
2440                 global $wgOut;
2441                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2442         }
2443
2444         /**
2445          * Filter an input field through a Unicode de-armoring process if it
2446          * came from an old browser with known broken Unicode editing issues.
2447          *
2448          * @param WebRequest $request
2449          * @param string $field
2450          * @return string
2451          * @private
2452          */
2453         function safeUnicodeInput( $request, $field ) {
2454                 $text = rtrim( $request->getText( $field ) );
2455                 return $request->getBool( 'safemode' )
2456                         ? $this->unmakesafe( $text )
2457                         : $text;
2458         }
2459
2460         /**
2461          * Filter an output field through a Unicode armoring process if it is
2462          * going to an old browser with known broken Unicode editing issues.
2463          *
2464          * @param string $text
2465          * @return string
2466          * @private
2467          */
2468         function safeUnicodeOutput( $text ) {
2469                 global $wgContLang;
2470                 $codedText = $wgContLang->recodeForEdit( $text );
2471                 return $this->checkUnicodeCompliantBrowser()
2472                         ? $codedText
2473                         : $this->makesafe( $codedText );
2474         }
2475
2476         /**
2477          * A number of web browsers are known to corrupt non-ASCII characters
2478          * in a UTF-8 text editing environment. To protect against this,
2479          * detected browsers will be served an armored version of the text,
2480          * with non-ASCII chars converted to numeric HTML character references.
2481          *
2482          * Preexisting such character references will have a 0 added to them
2483          * to ensure that round-trips do not alter the original data.
2484          *
2485          * @param string $invalue
2486          * @return string
2487          * @private
2488          */
2489         function makesafe( $invalue ) {
2490                 // Armor existing references for reversability.
2491                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
2492
2493                 $bytesleft = 0;
2494                 $result = "";
2495                 $working = 0;
2496                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2497                         $bytevalue = ord( $invalue{$i} );
2498                         if ( $bytevalue <= 0x7F ) { //0xxx xxxx
2499                                 $result .= chr( $bytevalue );
2500                                 $bytesleft = 0;
2501                         } elseif ( $bytevalue <= 0xBF ) { //10xx xxxx
2502                                 $working = $working << 6;
2503                                 $working += ($bytevalue & 0x3F);
2504                                 $bytesleft--;
2505                                 if ( $bytesleft <= 0 ) {
2506                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
2507                                 }
2508                         } elseif ( $bytevalue <= 0xDF ) { //110x xxxx
2509                                 $working = $bytevalue & 0x1F;
2510                                 $bytesleft = 1;
2511                         } elseif ( $bytevalue <= 0xEF ) { //1110 xxxx
2512                                 $working = $bytevalue & 0x0F;
2513                                 $bytesleft = 2;
2514                         } else { //1111 0xxx
2515                                 $working = $bytevalue & 0x07;
2516                                 $bytesleft = 3;
2517                         }
2518                 }
2519                 return $result;
2520         }
2521
2522         /**
2523          * Reverse the previously applied transliteration of non-ASCII characters
2524          * back to UTF-8. Used to protect data from corruption by broken web browsers
2525          * as listed in $wgBrowserBlackList.
2526          *
2527          * @param string $invalue
2528          * @return string
2529          * @private
2530          */
2531         function unmakesafe( $invalue ) {
2532                 $result = "";
2533                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2534                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
2535                                 $i += 3;
2536                                 $hexstring = "";
2537                                 do {
2538                                         $hexstring .= $invalue{$i};
2539                                         $i++;
2540                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
2541
2542                                 // Do some sanity checks. These aren't needed for reversability,
2543                                 // but should help keep the breakage down if the editor
2544                                 // breaks one of the entities whilst editing.
2545                                 if ( (substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6) ) {
2546                                         $codepoint = hexdec($hexstring);
2547                                         $result .= codepointToUtf8( $codepoint );
2548                                 } else {
2549                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
2550                                 }
2551                         } else {
2552                                 $result .= substr( $invalue, $i, 1 );
2553                         }
2554                 }
2555                 // reverse the transform that we made for reversability reasons.
2556                 return strtr( $result, array( "&#x0" => "&#x" ) );
2557         }
2558
2559         function noCreatePermission() {
2560                 global $wgOut;
2561                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
2562                 $wgOut->addWikiMsg( 'nocreatetext' );
2563         }
2564
2565         /**
2566          * Attempt submission
2567          * @return bool false if output is done, true if the rest of the form should be displayed
2568          */
2569         function attemptSave() {
2570                 global $wgUser, $wgOut, $wgTitle, $wgRequest;
2571
2572                 $resultDetails = false;
2573                 # Allow bots to exempt some edits from bot flagging
2574                 $bot = $wgUser->isAllowed('bot') && $wgRequest->getBool('bot',true);
2575                 $value = $this->internalAttemptSave( $resultDetails, $bot );
2576
2577                 if ( $value == self::AS_SUCCESS_UPDATE || $value == self::AS_SUCCESS_NEW_ARTICLE ) {
2578                         $this->didSave = true;
2579                 }
2580
2581                 switch ($value) {
2582                         case self::AS_HOOK_ERROR_EXPECTED:
2583                         case self::AS_CONTENT_TOO_BIG:
2584                         case self::AS_ARTICLE_WAS_DELETED:
2585                         case self::AS_CONFLICT_DETECTED:
2586                         case self::AS_SUMMARY_NEEDED:
2587                         case self::AS_TEXTBOX_EMPTY:
2588                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
2589                         case self::AS_END:
2590                                 return true;
2591
2592                         case self::AS_HOOK_ERROR:
2593                         case self::AS_FILTERING:
2594                         case self::AS_SUCCESS_NEW_ARTICLE:
2595                         case self::AS_SUCCESS_UPDATE:
2596                                 return false;
2597
2598                         case self::AS_SPAM_ERROR:
2599                                 $this->spamPage ( $resultDetails['spam'] );
2600                                 return false;
2601
2602                         case self::AS_BLOCKED_PAGE_FOR_USER:
2603                                 $this->blockedPage();
2604                                 return false;
2605
2606                         case self::AS_IMAGE_REDIRECT_ANON:
2607                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
2608                                 return false;
2609
2610                         case self::AS_READ_ONLY_PAGE_ANON:
2611                                 $this->userNotLoggedInPage();
2612                                 return false;
2613
2614                         case self::AS_READ_ONLY_PAGE_LOGGED:
2615                         case self::AS_READ_ONLY_PAGE:
2616                                 $wgOut->readOnlyPage();
2617                                 return false;
2618
2619                         case self::AS_RATE_LIMITED:
2620                                 $wgOut->rateLimited();
2621                                 return false;
2622
2623                         case self::AS_NO_CREATE_PERMISSION;
2624                                 $this->noCreatePermission();
2625                                 return;
2626
2627                         case self::AS_BLANK_ARTICLE:
2628                                 $wgOut->redirect( $wgTitle->getFullURL() );
2629                                 return false;
2630
2631                         case self::AS_IMAGE_REDIRECT_LOGGED:
2632                                 $wgOut->permissionRequired( 'upload' );
2633                                 return false;
2634                 }
2635         }
2636
2637         function getBaseRevision() {
2638                 if ( $this->mBaseRevision == false ) {
2639                         $db = wfGetDB( DB_MASTER );
2640                         $baseRevision = Revision::loadFromTimestamp(
2641                                 $db, $this->mTitle, $this->edittime );
2642                         return $this->mBaseRevision = $baseRevision;
2643                 } else {
2644                         return $this->mBaseRevision;
2645                 }
2646         }
2647 }