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         var $mShowSummaryField = true;
  71
  72         # Form values
  73         var $save = false, $preview = false, $diff = false;
  74         var $minoredit = false, $watchthis = false, $recreate = false;
  75         var $textbox1 = '', $textbox2 = '', $summary = '', $nosummary = false;
  76         var $edittime = '', $section = '', $starttime = '';
  77         var $oldid = 0, $editintro = '', $scrolltop = null, $bot = true;
  78
  79         # Placeholders for text injection by hooks (must be HTML)
  80         # extensions should take care to _append_ to the present value
  81         public $editFormPageTop; // Before even the preview
  82         public $editFormTextTop;
  83         public $editFormTextBeforeContent;
  84         public $editFormTextAfterWarn;
  85         public $editFormTextAfterTools;
  86         public $editFormTextBottom;
  87         public $editFormTextAfterContent;
  88         public $previewTextAfterContent;
  89
  90         /* $didSave should be set to true whenever an article was succesfully altered. */
  91         public $didSave = false;
  92         public $undidRev = 0;
  93
  94         public $suppressIntro = false;
  95
  96         /**
  97          * @todo document
  98          * @param $article
  99          */
 100         function EditPage( $article ) {
 101                 $this->mArticle =& $article;
 102                 $this->mTitle = $article->getTitle();
 103                 $this->action = 'submit';
 104
 105                 # Placeholders for text injection by hooks (empty per default)
 106                 $this->editFormPageTop =
 107                 $this->editFormTextTop =
 108                 $this->editFormTextBeforeContent =
 109                 $this->editFormTextAfterWarn =
 110                 $this->editFormTextAfterTools =
 111                 $this->editFormTextBottom =
 112                 $this->editFormTextAfterContent =
 113                 $this->previewTextAfterContent =
 114                 $this->mPreloadText = "";
 115         }
 116
 117         function getArticle() {
 118                 return $this->mArticle;
 119         }
 120
 121
 122         /**
 123          * Fetch initial editing page content.
 124          * @returns mixed string on success, $def_text for invalid sections
 125          * @private
 126          */
 127         function getContent( $def_text = '' ) {
 128                 global $wgOut, $wgRequest, $wgParser, $wgContLang, $wgMessageCache;
 129
 130                 wfProfileIn( __METHOD__ );
 131                 # Get variables from query string :P
 132                 $section = $wgRequest->getVal( 'section' );
 133
 134                 $preload = $wgRequest->getVal( 'preload',
 135                         // Custom preload text for new sections
 136                         $section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 137                 $undoafter = $wgRequest->getVal( 'undoafter' );
 138                 $undo = $wgRequest->getVal( 'undo' );
 139
 140                 $text = '';
 141                 // For message page not locally set, use the i18n message.
 142                 // For other non-existent articles, use preload text if any.
 143                 if ( !$this->mTitle->exists() ) {
 144                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 145                                 # If this is a system message, get the default text.
 146                                 list( $message, $lang ) = $wgMessageCache->figureMessage( $wgContLang->lcfirst( $this->mTitle->getText() ) );
 147                                 $wgMessageCache->loadAllMessages( $lang );
 148                                 $text = wfMsgGetKey( $message, false, $lang, false );
 149                                 if( wfEmptyMsg( $message, $text ) )
 150                                         $text = $this->getPreloadedText( $preload );
 151                         } else {
 152                                 # If requested, preload some text.
 153                                 $text = $this->getPreloadedText( $preload );
 154                         }
 155                 // For existing pages, get text based on "undo" or section parameters.
 156                 } else {
 157                         $text = $this->mArticle->getContent();
 158                         if ( $undo > 0 && $undoafter > 0 && $undo < $undoafter ) {
 159                                 # If they got undoafter and undo round the wrong way, switch them
 160                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 161                         }
 162                         if ( $undo > 0 && $undo > $undoafter ) {
 163                                 # Undoing a specific edit overrides section editing; section-editing
 164                                 # doesn't work with undoing.
 165                                 if ( $undoafter ) {
 166                                         $undorev = Revision::newFromId( $undo );
 167                                         $oldrev = Revision::newFromId( $undoafter );
 168                                 } else {
 169                                         $undorev = Revision::newFromId( $undo );
 170                                         $oldrev = $undorev ? $undorev->getPrevious() : null;
 171                                 }
 172
 173                                 # Sanity check, make sure it's the right page,
 174                                 # the revisions exist and they were not deleted.
 175                                 # Otherwise, $text will be left as-is.
 176                                 if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 177                                         $undorev->getPage() == $oldrev->getPage() &&
 178                                         $undorev->getPage() == $this->mArticle->getID() &&
 179                                         !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 180                                         !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 181
 182                                         $undotext = $this->mArticle->getUndoText( $undorev, $oldrev );
 183                                         if ( $undotext === false ) {
 184                                                 # Warn the user that something went wrong
 185                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-failure">' . wfMsgNoTrans( 'undo-failure' ) . '</div>' );
 186                                         } else {
 187                                                 $text = $undotext;
 188                                                 # Inform the user of our success and set an automatic edit summary
 189                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="mw-undo-success">' . wfMsgNoTrans( 'undo-success' ) . '</div>' );
 190                                                 $firstrev = $oldrev->getNext();
 191                                                 # If we just undid one rev, use an autosummary
 192                                                 if ( $firstrev->mId == $undo ) {
 193                                                         $this->summary = wfMsgForContent( 'undo-summary', $undo, $undorev->getUserText() );
 194                                                         $this->undidRev = $undo;
 195                                                 }
 196                                                 $this->formtype = 'diff';
 197                                         }
 198                                 } else {
 199                                         // Failed basic sanity checks.
 200                                         // Older revisions may have been removed since the link
 201                                         // was created, or we may simply have got bogus input.
 202                                         $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-norev">' . wfMsgNoTrans( 'undo-norev' ) . '</div>' );
 203                                 }
 204                         } else if ( $section != '' ) {
 205                                 if ( $section == 'new' ) {
 206                                         $text = $this->getPreloadedText( $preload );
 207                                 } else {
 208                                         // Get section edit text (returns $def_text for invalid sections)
 209                                         $text = $wgParser->getSection( $text, $section, $def_text );
 210                                 }
 211                         }
 212                 }
 213
 214                 wfProfileOut( __METHOD__ );
 215                 return $text;
 216         }
 217
 218         /** Use this method before edit() to preload some text into the edit box */
 219         public function setPreloadedText( $text ) {
 220                 $this->mPreloadText = $text;
 221         }
 222
 223         /**
 224          * Get the contents of a page from its title and remove includeonly tags
 225          *
 226          * @param $preload String: the title of the page.
 227          * @return string The contents of the page.
 228          */
 229         protected function getPreloadedText( $preload ) {
 230                 if ( !empty( $this->mPreloadText ) ) {
 231                         return $this->mPreloadText;
 232                 } elseif ( $preload === '' ) {
 233                         return '';
 234                 } else {
 235                         $preloadTitle = Title::newFromText( $preload );
 236                         if ( isset( $preloadTitle ) && $preloadTitle->userCanRead() ) {
 237                                 $rev = Revision::newFromTitle( $preloadTitle );
 238                                 if ( is_object( $rev ) ) {
 239                                         $text = $rev->getText();
 240                                         // TODO FIXME: AAAAAAAAAAA, this shouldn't be implementing
 241                                         // its own mini-parser! -ævar
 242                                         $text = preg_replace( '~</?includeonly>~', '', $text );
 243                                         return $text;
 244                                 } else
 245                                         return '';
 246                         }
 247                 }
 248         }
 249
 250         /**
 251          * This is the function that extracts metadata from the article body on the first view.
 252          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
 253          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
 254          */
 255         function extractMetaDataFromArticle () {
 256                 global $wgUseMetadataEdit, $wgMetadataWhitelist, $wgContLang;
 257                 $this->mMetaData = '';
 258                 if ( !$wgUseMetadataEdit ) return;
 259                 if ( $wgMetadataWhitelist == '' ) return;
 260                 $s = '';
 261                 $t = $this->getContent();
 262
 263                 # MISSING : <nowiki> filtering
 264
 265                 # Categories and language links
 266                 $t = explode( "\n" , $t );
 267                 $catlow = strtolower( $wgContLang->getNsText( NS_CATEGORY ) );
 268                 $cat = $ll = array();
 269                 foreach ( $t as $key => $x ) {
 270                         $y = trim( strtolower ( $x ) );
 271                         while ( substr( $y , 0 , 2 ) == '[[' ) {
 272                                 $y = explode( ']]' , trim ( $x ) );
 273                                 $first = array_shift( $y );
 274                                 $first = explode( ':' , $first );
 275                                 $ns = array_shift( $first );
 276                                 $ns = trim( str_replace( '[' , '' , $ns ) );
 277                                 if ( $wgContLang->getLanguageName( $ns ) || strtolower( $ns ) == $catlow ) {
 278                                         $add = '[[' . $ns . ':' . implode( ':' , $first ) . ']]';
 279                                         if ( strtolower( $ns ) == $catlow ) $cat[] = $add;
 280                                         else $ll[] = $add;
 281                                         $x = implode( ']]', $y );
 282                                         $t[$key] = $x;
 283                                         $y = trim( strtolower( $x ) );
 284                                 } else {
 285                                         $x = implode( ']]' , $y );
 286                                         $y = trim( strtolower( $x ) );
 287                                 }
 288                         }
 289                 }
 290                 if ( count( $cat ) ) $s .= implode( ' ' , $cat ) . "\n";
 291                 if ( count( $ll ) ) $s .= implode( ' ' , $ll ) . "\n";
 292                 $t = implode( "\n" , $t );
 293
 294                 # Load whitelist
 295                 $sat = array () ; # stand-alone-templates; must be lowercase
 296                 $wl_title = Title::newFromText( $wgMetadataWhitelist );
 297                 $wl_article = new Article ( $wl_title );
 298                 $wl = explode ( "\n" , $wl_article->getContent() );
 299                 foreach ( $wl AS $x ) {
 300                         $isentry = false;
 301                         $x = trim ( $x );
 302                         while ( substr ( $x , 0 , 1 ) == '*' ) {
 303                                 $isentry = true;
 304                                 $x = trim ( substr ( $x , 1 ) );
 305                         }
 306                         if ( $isentry ) {
 307                                 $sat[] = strtolower ( $x );
 308                         }
 309
 310                 }
 311
 312                 # Templates, but only some
 313                 $t = explode( '{{' , $t );
 314                 $tl = array() ;
 315                 foreach ( $t as $key => $x ) {
 316                         $y = explode( '}}' , $x , 2 );
 317                         if ( count( $y ) == 2 ) {
 318                                 $z = $y[0];
 319                                 $z = explode( '|' , $z );
 320                                 $tn = array_shift( $z );
 321                                 if ( in_array( strtolower( $tn ) , $sat ) ) {
 322                                         $tl[] = '{{' . $y[0] . '}}';
 323                                         $t[$key] = $y[1];
 324                                         $y = explode( '}}' , $y[1] , 2 );
 325                                 }
 326                                 else $t[$key] = '{{' . $x;
 327                         }
 328                         else if ( $key != 0 ) $t[$key] = '{{' . $x;
 329                         else $t[$key] = $x;
 330                 }
 331                 if ( count( $tl ) ) $s .= implode( ' ' , $tl );
 332                 $t = implode( '' , $t );
 333
 334                 $t = str_replace( "\n\n\n", "\n", $t );
 335                 $this->mArticle->mContent = $t;
 336                 $this->mMetaData = $s;
 337         }
 338
 339         /*
 340          * Check if a page was deleted while the user was editing it, before submit.
 341          * Note that we rely on the logging table, which hasn't been always there,
 342          * but that doesn't matter, because this only applies to brand new
 343          * deletes.
 344          */
 345         protected function wasDeletedSinceLastEdit() {
 346                 if ( $this->deletedSinceEdit )
 347                         return true;
 348                 if ( $this->mTitle->isDeletedQuick() ) {
 349                         $this->lastDelete = $this->getLastDelete();
 350                         if ( $this->lastDelete ) {
 351                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
 352                                 if ( $deleteTime > $this->starttime ) {
 353                                         $this->deletedSinceEdit = true;
 354                                 }
 355                         }
 356                 }
 357                 return $this->deletedSinceEdit;
 358         }
 359
 360         function submit() {
 361                 $this->edit();
 362         }
 363
 364         /**
 365          * This is the function that gets called for "action=edit". It
 366          * sets up various member variables, then passes execution to
 367          * another function, usually showEditForm()
 368          *
 369          * The edit form is self-submitting, so that when things like
 370          * preview and edit conflicts occur, we get the same form back
 371          * with the extra stuff added.  Only when the final submission
 372          * is made and all is well do we actually save and redirect to
 373          * the newly-edited page.
 374          */
 375         function edit() {
 376                 global $wgOut, $wgRequest, $wgUser;
 377                 // Allow extensions to modify/prevent this form or submission
 378                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 379                         return;
 380                 }
 381
 382                 wfProfileIn( __METHOD__ );
 383                 wfDebug( __METHOD__.": enter\n" );
 384
 385                 // This is not an article
 386                 $wgOut->setArticleFlag( false );
 387
 388                 $this->importFormData( $wgRequest );
 389                 $this->firsttime = false;
 390
 391                 if ( $this->live ) {
 392                         $this->livePreview();
 393                         wfProfileOut( __METHOD__ );
 394                         return;
 395                 }
 396
 397                 if ( wfReadOnly() && $this->save ) {
 398                         // Force preview
 399                         $this->save = false;
 400                         $this->preview = true;
 401                 }
 402
 403                 $wgOut->addScriptFile( 'edit.js' );
 404
 405                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
 406                         $wgOut->includeJQuery();
 407                         $wgOut->addScriptFile( 'preview.js' );
 408                 }
 409                 // Bug #19334: textarea jumps when editing articles in IE8
 410                 $wgOut->addStyle( 'common/IE80Fixes.css', 'screen', 'IE 8' );
 411
 412                 $permErrors = $this->getEditPermissionErrors();
 413                 if ( $permErrors ) {
 414                         wfDebug( __METHOD__ . ": User can't edit\n" );
 415                         $this->readOnlyPage( $this->getContent( false ), true, $permErrors, 'edit' );
 416                         wfProfileOut( __METHOD__ );
 417                         return;
 418                 } else {
 419                         if ( $this->save ) {
 420                                 $this->formtype = 'save';
 421                         } else if ( $this->preview ) {
 422                                 $this->formtype = 'preview';
 423                         } else if ( $this->diff ) {
 424                                 $this->formtype = 'diff';
 425                         } else { # First time through
 426                                 $this->firsttime = true;
 427                                 if ( $this->previewOnOpen() ) {
 428                                         $this->formtype = 'preview';
 429                                 } else {
 430                                         $this->extractMetaDataFromArticle () ;
 431                                         $this->formtype = 'initial';
 432                                 }
 433                         }
 434                 }
 435
 436                 // If they used redlink=1 and the page exists, redirect to the main article
 437                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 438                         $wgOut->redirect( $this->mTitle->getFullURL() );
 439                 }
 440
 441                 wfProfileIn( __METHOD__."-business-end" );
 442
 443                 $this->isConflict = false;
 444                 // css / js subpages of user pages get a special treatment
 445                 $this->isCssJsSubpage      = $this->mTitle->isCssJsSubpage();
 446                 $this->isCssSubpage        = $this->mTitle->isCssSubpage();
 447                 $this->isJsSubpage         = $this->mTitle->isJsSubpage();
 448                 $this->isValidCssJsSubpage = $this->mTitle->isValidCssJsSubpage();
 449
 450                 # Show applicable editing introductions
 451                 if ( $this->formtype == 'initial' || $this->firsttime )
 452                         $this->showIntro();
 453
 454                 if ( $this->mTitle->isTalkPage() ) {
 455                         $wgOut->addWikiMsg( 'talkpagetext' );
 456                 }
 457
 458                 # Optional notices on a per-namespace and per-page basis
 459                 $editnotice_ns   = 'editnotice-'.$this->mTitle->getNamespace();
 460                 if ( !wfEmptyMsg( $editnotice_ns, wfMsgForContent( $editnotice_ns ) ) ) {
 461                         $wgOut->addWikiText( wfMsgForContent( $editnotice_ns )  );
 462                 }
 463                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
 464                         $parts = explode( '/', $this->mTitle->getDBkey() );
 465                         $editnotice_base = $editnotice_ns;
 466                         while ( count( $parts ) > 0 ) {
 467                                 $editnotice_base .= '-'.array_shift( $parts );
 468                                 if ( !wfEmptyMsg( $editnotice_base, wfMsgForContent( $editnotice_base ) ) ) {
 469                                         $wgOut->addWikiText( wfMsgForContent( $editnotice_base )  );
 470                                 }
 471                         }
 472                 }
 473
 474                 # Attempt submission here.  This will check for edit conflicts,
 475                 # and redundantly check for locked database, blocked IPs, etc.
 476                 # that edit() already checked just in case someone tries to sneak
 477                 # in the back door with a hand-edited submission URL.
 478
 479                 if ( 'save' == $this->formtype ) {
 480                         if ( !$this->attemptSave() ) {
 481                                 wfProfileOut( __METHOD__."-business-end" );
 482                                 wfProfileOut( __METHOD__ );
 483                                 return;
 484                         }
 485                 }
 486
 487                 # First time through: get contents, set time for conflict
 488                 # checking, etc.
 489                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 490                         if ( $this->initialiseForm() === false ) {
 491                                 $this->noSuchSectionPage();
 492                                 wfProfileOut( __METHOD__."-business-end" );
 493                                 wfProfileOut( __METHOD__ );
 494                                 return;
 495                         }
 496                         if ( !$this->mTitle->getArticleId() )
 497                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 498                 }
 499
 500                 $this->showEditForm();
 501                 wfProfileOut( __METHOD__."-business-end" );
 502                 wfProfileOut( __METHOD__ );
 503         }
 504
 505         protected function getEditPermissionErrors() {
 506                 global $wgUser;
 507                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 508                 # Can this title be created?
 509                 if ( !$this->mTitle->exists() ) {
 510                         $permErrors = array_merge( $permErrors,
 511                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 512                 }
 513                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 514                 $remove = array();
 515                 foreach( $permErrors as $error ) {
 516                         if ( ( $this->preview || $this->diff ) &&
 517                                 ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' ) )
 518                         {
 519                                 $remove[] = $error;
 520                         }
 521                 }
 522                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 523                 return $permErrors;
 524         }
 525
 526         /**
 527          * Show a read-only error
 528          * Parameters are the same as OutputPage:readOnlyPage()
 529          * Redirect to the article page if redlink=1
 530          */
 531         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 532                 global $wgRequest, $wgOut;
 533                 if ( $wgRequest->getBool( 'redlink' ) ) {
 534                         // The edit page was reached via a red link.
 535                         // Redirect to the article page and let them click the edit tab if
 536                         // they really want a permission error.
 537                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 538                 } else {
 539                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 540                 }
 541         }
 542
 543         /**
 544          * Should we show a preview when the edit form is first shown?
 545          *
 546          * @return bool
 547          */
 548         protected function previewOnOpen() {
 549                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 550                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 551                         // Explicit override from request
 552                         return true;
 553                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 554                         // Explicit override from request
 555                         return false;
 556                 } elseif ( $this->section == 'new' ) {
 557                         // Nothing *to* preview for new sections
 558                         return false;
 559                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 560                         // Standard preference behaviour
 561                         return true;
 562                 } elseif ( !$this->mTitle->exists() &&
 563                   isset($wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]) &&
 564                   $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 565                 {
 566                         // Categories are special
 567                         return true;
 568                 } else {
 569                         return false;
 570                 }
 571         }
 572
 573         /**
 574          * Does this EditPage class support section editing?
 575          * This is used by EditPage subclasses to indicate their ui cannot handle section edits
 576          *
 577          * @return bool
 578          */
 579         protected function isSectionEditSupported() {
 580                 return true;
 581         }
 582
 583         /**
 584          * Returns the URL to use in the form's action attribute.
 585          * This is used by EditPage subclasses when simply customizing the action
 586          * variable in the constructor is not enough. This can be used when the
 587          * EditPage lives inside of a Special page rather than a custom page action.
 588          *
 589          * @param Title $title The title for which is being edited (where we go to for &action= links)
 590          * @return string
 591          */
 592         protected function getActionURL( Title $title ) {
 593                 return $title->getLocalURL( array( 'action' => $this->action ) );
 594         }
 595
 596         /**
 597          * @todo document
 598          * @param $request
 599          */
 600         function importFormData( &$request ) {
 601                 global $wgLang, $wgUser;
 602
 603                 wfProfileIn( __METHOD__ );
 604
 605                 # Section edit can come from either the form or a link
 606                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 607
 608                 if ( $request->wasPosted() ) {
 609                         # These fields need to be checked for encoding.
 610                         # Also remove trailing whitespace, but don't remove _initial_
 611                         # whitespace from the text boxes. This may be significant formatting.
 612                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 613                         if ( !$request->getCheck('wpTextbox2') ) {
 614                                 // Skip this if wpTextbox2 has input, it indicates that we came
 615                                 // from a conflict page with raw page text, not a custom form
 616                                 // modified by subclasses
 617                                 wfProfileIn( get_class($this)."::importContentFormData" );
 618                                 $textbox1 = $this->importContentFormData( $request );
 619                                 if ( isset($textbox1) )
 620                                         $this->textbox1 = $textbox1;
 621                                 wfProfileOut( get_class($this)."::importContentFormData" );
 622                         }
 623                         $this->mMetaData = rtrim( $request->getText( 'metadata' ) );
 624                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 625                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary' ), 250, '' );
 626
 627                         # Remove extra headings from summaries and new sections.
 628                         $this->summary = preg_replace('/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary);
 629
 630                         $this->edittime = $request->getVal( 'wpEdittime' );
 631                         $this->starttime = $request->getVal( 'wpStarttime' );
 632
 633                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 634
 635                         if ( is_null( $this->edittime ) ) {
 636                                 # If the form is incomplete, force to preview.
 637                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 638                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 639                                 $this->preview = true;
 640                         } else {
 641                                 /* Fallback for live preview */
 642                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 643                                 $this->diff = $request->getCheck( 'wpDiff' );
 644
 645                                 // Remember whether a save was requested, so we can indicate
 646                                 // if we forced preview due to session failure.
 647                                 $this->mTriedSave = !$this->preview;
 648
 649                                 if ( $this->tokenOk( $request ) ) {
 650                                         # Some browsers will not report any submit button
 651                                         # if the user hits enter in the comment box.
 652                                         # The unmarked state will be assumed to be a save,
 653                                         # if the form seems otherwise complete.
 654                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 655                                 } else if ( $this->diff ) {
 656                                         # Failed token check, but only requested "Show Changes".
 657                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 658                                 } else {
 659                                         # Page might be a hack attempt posted from
 660                                         # an external site. Preview instead of saving.
 661                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 662                                         $this->preview = true;
 663                                 }
 664                         }
 665                         $this->save = !$this->preview && !$this->diff;
 666                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 667                                 $this->edittime = null;
 668                         }
 669
 670                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 671                                 $this->starttime = null;
 672                         }
 673
 674                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 675
 676                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 677                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 678
 679                         # Don't force edit summaries when a user is editing their own user or talk page
 680                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 681                                 $this->mTitle->getText() == $wgUser->getName() )
 682                         {
 683                                 $this->allowBlankSummary = true;
 684                         } else {
 685                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary');
 686                         }
 687
 688                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 689                 } else {
 690                         # Not a posted form? Start with nothing.
 691                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 692                         $this->textbox1  = '';
 693                         $this->mMetaData = '';
 694                         $this->summary   = '';
 695                         $this->edittime  = '';
 696                         $this->starttime = wfTimestampNow();
 697                         $this->edit      = false;
 698                         $this->preview   = false;
 699                         $this->save      = false;
 700                         $this->diff      = false;
 701                         $this->minoredit = false;
 702                         $this->watchthis = $request->getBool( 'watchthis', false ); // Watch may be overriden by request parameters
 703                         $this->recreate  = false;
 704
 705                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 706                                 $this->summary = $request->getVal( 'preloadtitle' );
 707                         }
 708                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 709                                 $this->summary = $request->getText( 'summary' );
 710                         }
 711
 712                         if ( $request->getVal( 'minor' ) ) {
 713                                 $this->minoredit = true;
 714                         }
 715                 }
 716
 717                 $this->bot = $request->getBool( 'bot', true );
 718                 $this->nosummary = $request->getBool( 'nosummary' );
 719
 720                 // FIXME: unused variable?
 721                 $this->oldid = $request->getInt( 'oldid' );
 722
 723                 $this->live = $request->getCheck( 'live' );
 724                 $this->editintro = $request->getText( 'editintro',
 725                         // Custom edit intro for new sections
 726                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 727
 728                 wfProfileOut( __METHOD__ );
 729
 730                 // Allow extensions to modify form data
 731                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 732         }
 733
 734         /**
 735          * Subpage overridable method for extracting the page content data from the
 736          * posted form to be placed in $this->textbox1, if using customized input
 737          * this method should be overrided and return the page text that will be used
 738          * for saving, preview parsing and so on...
 739          *
 740          * @praram WebRequest $request
 741          */
 742         protected function importContentFormData( &$request ) {
 743                 return; // Don't do anything, EditPage already extracted wpTextbox1
 744         }
 745
 746         /**
 747          * Make sure the form isn't faking a user's credentials.
 748          *
 749          * @param $request WebRequest
 750          * @return bool
 751          * @private
 752          */
 753         function tokenOk( &$request ) {
 754                 global $wgUser;
 755                 $token = $request->getVal( 'wpEditToken' );
 756                 $this->mTokenOk = $wgUser->matchEditToken( $token );
 757                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
 758                 return $this->mTokenOk;
 759         }
 760
 761         /**
 762          * Show all applicable editing introductions
 763          */
 764         protected function showIntro() {
 765                 global $wgOut, $wgUser;
 766                 if ( $this->suppressIntro ) {
 767                         return;
 768                 }
 769
 770                 $namespace = $this->mTitle->getNamespace();
 771
 772                 if ( $namespace == NS_MEDIAWIKI ) {
 773                         # Show a warning if editing an interface message
 774                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1</div>", 'editinginterface' );
 775                 }
 776
 777                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
 778                 # Show log extract when the user is currently blocked
 779                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
 780                         $parts = explode( '/', $this->mTitle->getText(), 2 );
 781                         $username = $parts[0];
 782                         $id = User::idFromName( $username );
 783                         $ip = User::isIP( $username );
 784                         if ( $id == 0 && !$ip ) { # User does not exist
 785                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1</div>",
 786                                         array( 'userpage-userdoesnotexist', $username ) );
 787                         } else if (User::newFromId($id)->isBlocked()) { # Show log extract if the user is currently blocked
 788                                 LogEventsList::showLogExtract(
 789                                         $wgOut,
 790                                         'block',
 791                                         $this->mTitle->getSubjectPage()->getPrefixedText(),
 792                                         '',
 793                                         array(
 794                                                 'lim' => 1,
 795                                                 'showIfEmpty' => false,
 796                                                 'msgKey' => array(
 797                                                         'sp-contributions-blocked-notice',
 798                                                         $this->mTitle->getSubjectPage()->getPrefixedText() # Support GENDER in notice
 799                                                 )
 800                                         )
 801                                 );
 802                         }
 803                 }
 804                 # Try to add a custom edit intro, or use the standard one if this is not possible.
 805                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
 806                         if ( $wgUser->isLoggedIn() ) {
 807                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1</div>", 'newarticletext' );
 808                         } else {
 809                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1</div>", 'newarticletextanon' );
 810                         }
 811                 }
 812                 # Give a notice if the user is editing a deleted/moved page...
 813                 if ( !$this->mTitle->exists() ) {
 814                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle->getPrefixedText(),
 815                                 '', array( 'lim' => 10,
 816                                            'conds' => array( "log_action != 'revision'" ),
 817                                            'showIfEmpty' => false,
 818                                            'msgKey' => array( 'recreate-moveddeleted-warn') )
 819                         );
 820                 }
 821         }
 822
 823         /**
 824          * Attempt to show a custom editing introduction, if supplied
 825          *
 826          * @return bool
 827          */
 828         protected function showCustomIntro() {
 829                 if ( $this->editintro ) {
 830                         $title = Title::newFromText( $this->editintro );
 831                         if ( $title instanceof Title && $title->exists() && $title->userCanRead() ) {
 832                                 global $wgOut;
 833                                 $revision = Revision::newFromTitle( $title );
 834                                 $wgOut->addWikiTextTitleTidy( $revision->getText(), $this->mTitle );
 835                                 return true;
 836                         } else {
 837                                 return false;
 838                         }
 839                 } else {
 840                         return false;
 841                 }
 842         }
 843
 844         /**
 845          * Attempt submission (no UI)
 846          * @return one of the constants describing the result
 847          */
 848         function internalAttemptSave( &$result, $bot = false ) {
 849                 global $wgFilterCallback, $wgUser, $wgOut, $wgParser;
 850                 global $wgMaxArticleSize;
 851
 852                 wfProfileIn( __METHOD__  );
 853                 wfProfileIn( __METHOD__ . '-checks' );
 854
 855                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) )
 856                 {
 857                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
 858                         return self::AS_HOOK_ERROR;
 859                 }
 860
 861                 # Check image redirect
 862                 if ( $this->mTitle->getNamespace() == NS_FILE &&
 863                         Title::newFromRedirect( $this->textbox1 ) instanceof Title &&
 864                         !$wgUser->isAllowed( 'upload' ) ) {
 865                                 if ( $wgUser->isAnon() ) {
 866                                         return self::AS_IMAGE_REDIRECT_ANON;
 867                                 } else {
 868                                         return self::AS_IMAGE_REDIRECT_LOGGED;
 869                                 }
 870                 }
 871
 872                 # Reintegrate metadata
 873                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 874                 $this->mMetaData = '' ;
 875
 876                 # Check for spam
 877                 $match = self::matchSummarySpamRegex( $this->summary );
 878                 if ( $match === false ) {
 879                         $match = self::matchSpamRegex( $this->textbox1 );
 880                 }
 881                 if ( $match !== false ) {
 882                         $result['spam'] = $match;
 883                         $ip = wfGetIP();
 884                         $pdbk = $this->mTitle->getPrefixedDBkey();
 885                         $match = str_replace( "\n", '', $match );
 886                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
 887                         wfProfileOut( __METHOD__ . '-checks' );
 888                         wfProfileOut( __METHOD__ );
 889                         return self::AS_SPAM_ERROR;
 890                 }
 891                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
 892                         # Error messages or other handling should be performed by the filter function
 893                         wfProfileOut( __METHOD__ . '-checks' );
 894                         wfProfileOut( __METHOD__ );
 895                         return self::AS_FILTERING;
 896                 }
 897                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
 898                         # Error messages etc. could be handled within the hook...
 899                         wfProfileOut( __METHOD__ . '-checks' );
 900                         wfProfileOut( __METHOD__ );
 901                         return self::AS_HOOK_ERROR;
 902                 } elseif ( $this->hookError != '' ) {
 903                         # ...or the hook could be expecting us to produce an error
 904                         wfProfileOut( __METHOD__ . '-checks' );
 905                         wfProfileOut( __METHOD__ );
 906                         return self::AS_HOOK_ERROR_EXPECTED;
 907                 }
 908                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 909                         # Check block state against master, thus 'false'.
 910                         wfProfileOut( __METHOD__ . '-checks' );
 911                         wfProfileOut( __METHOD__ );
 912                         return self::AS_BLOCKED_PAGE_FOR_USER;
 913                 }
 914                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
 915                 if ( $this->kblength > $wgMaxArticleSize ) {
 916                         // Error will be displayed by showEditForm()
 917                         $this->tooBig = true;
 918                         wfProfileOut( __METHOD__ . '-checks' );
 919                         wfProfileOut( __METHOD__ );
 920                         return self::AS_CONTENT_TOO_BIG;
 921                 }
 922
 923                 if ( !$wgUser->isAllowed( 'edit' ) ) {
 924                         if ( $wgUser->isAnon() ) {
 925                                 wfProfileOut( __METHOD__ . '-checks' );
 926                                 wfProfileOut( __METHOD__ );
 927                                 return self::AS_READ_ONLY_PAGE_ANON;
 928                         } else {
 929                                 wfProfileOut( __METHOD__ . '-checks' );
 930                                 wfProfileOut( __METHOD__ );
 931                                 return self::AS_READ_ONLY_PAGE_LOGGED;
 932                         }
 933                 }
 934
 935                 if ( wfReadOnly() ) {
 936                         wfProfileOut( __METHOD__ . '-checks' );
 937                         wfProfileOut( __METHOD__ );
 938                         return self::AS_READ_ONLY_PAGE;
 939                 }
 940                 if ( $wgUser->pingLimiter() ) {
 941                         wfProfileOut( __METHOD__ . '-checks' );
 942                         wfProfileOut( __METHOD__ );
 943                         return self::AS_RATE_LIMITED;
 944                 }
 945
 946                 # If the article has been deleted while editing, don't save it without
 947                 # confirmation
 948                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
 949                         wfProfileOut( __METHOD__ . '-checks' );
 950                         wfProfileOut( __METHOD__ );
 951                         return self::AS_ARTICLE_WAS_DELETED;
 952                 }
 953
 954                 wfProfileOut( __METHOD__ . '-checks' );
 955
 956                 # If article is new, insert it.
 957                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 958                 if ( 0 == $aid ) {
 959                         // Late check for create permission, just in case *PARANOIA*
 960                         if ( !$this->mTitle->userCan( 'create' ) ) {
 961                                 wfDebug( __METHOD__ . ": no create permission\n" );
 962                                 wfProfileOut( __METHOD__ );
 963                                 return self::AS_NO_CREATE_PERMISSION;
 964                         }
 965
 966                         # Don't save a new article if it's blank.
 967                         if ( $this->textbox1 == '' ) {
 968                                 wfProfileOut( __METHOD__ );
 969                                 return self::AS_BLANK_ARTICLE;
 970                         }
 971
 972                         // Run post-section-merge edit filter
 973                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
 974                                 # Error messages etc. could be handled within the hook...
 975                                 wfProfileOut( __METHOD__ );
 976                                 return self::AS_HOOK_ERROR;
 977                         } elseif ( $this->hookError != '' ) {
 978                                 # ...or the hook could be expecting us to produce an error
 979                                 wfProfileOut( __METHOD__ );
 980                                 return self::AS_HOOK_ERROR_EXPECTED;
 981                         }
 982
 983                         # Handle the user preference to force summaries here. Check if it's not a redirect.
 984                         if ( !$this->allowBlankSummary && !Title::newFromRedirect( $this->textbox1 ) ) {
 985                                 if ( md5( $this->summary ) == $this->autoSumm ) {
 986                                         $this->missingSummary = true;
 987                                         wfProfileOut( __METHOD__ );
 988                                         return self::AS_SUMMARY_NEEDED;
 989                                 }
 990                         }
 991
 992                         $isComment = ( $this->section == 'new' );
 993
 994                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 995                                 $this->minoredit, $this->watchthis, false, $isComment, $bot );
 996
 997                         wfProfileOut( __METHOD__ );
 998                         return self::AS_SUCCESS_NEW_ARTICLE;
 999                 }
1000
1001                 # Article exists. Check for edit conflict.
1002
1003                 $this->mArticle->clear(); # Force reload of dates, etc.
1004                 $this->mArticle->forUpdate( true ); # Lock the article
1005
1006                 wfDebug( "timestamp: {$this->mArticle->getTimestamp()}, edittime: {$this->edittime}\n" );
1007
1008                 if ( $this->mArticle->getTimestamp() != $this->edittime ) {
1009                         $this->isConflict = true;
1010                         if ( $this->section == 'new' ) {
1011                                 if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1012                                         $this->mArticle->getComment() == $this->summary ) {
1013                                         // Probably a duplicate submission of a new comment.
1014                                         // This can happen when squid resends a request after
1015                                         // a timeout but the first one actually went through.
1016                                         wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
1017                                 } else {
1018                                         // New comment; suppress conflict.
1019                                         $this->isConflict = false;
1020                                         wfDebug( __METHOD__ .": conflict suppressed; new section\n" );
1021                                 }
1022                         }
1023                 }
1024                 $userid = $wgUser->getId();
1025
1026                 # Suppress edit conflict with self, except for section edits where merging is required.
1027                 if ( $this->isConflict && $this->section == '' && $this->userWasLastToEdit( $userid, $this->edittime ) ) {
1028                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1029                         $this->isConflict = false;
1030                 }
1031
1032                 if ( $this->isConflict ) {
1033                         wfDebug( __METHOD__ . ": conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
1034                                 $this->mArticle->getTimestamp() . "')\n" );
1035                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime );
1036                 } else {
1037                         wfDebug( __METHOD__ . ": getting section '$this->section'\n" );
1038                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary );
1039                 }
1040                 if ( is_null( $text ) ) {
1041                         wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1042                         $this->isConflict = true;
1043                         $text = $this->textbox1; // do not try to merge here!
1044                 } else if ( $this->isConflict ) {
1045                         # Attempt merge
1046                         if ( $this->mergeChangesInto( $text ) ) {
1047                                 // Successful merge! Maybe we should tell the user the good news?
1048                                 $this->isConflict = false;
1049                                 wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1050                         } else {
1051                                 $this->section = '';
1052                                 $this->textbox1 = $text;
1053                                 wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1054                         }
1055                 }
1056
1057                 if ( $this->isConflict ) {
1058                         wfProfileOut( __METHOD__ );
1059                         return self::AS_CONFLICT_DETECTED;
1060                 }
1061
1062                 $oldtext = $this->mArticle->getContent();
1063
1064                 // Run post-section-merge edit filter
1065                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$this->hookError, $this->summary ) ) ) {
1066                         # Error messages etc. could be handled within the hook...
1067                         wfProfileOut( __METHOD__ );
1068                         return self::AS_HOOK_ERROR;
1069                 } elseif ( $this->hookError != '' ) {
1070                         # ...or the hook could be expecting us to produce an error
1071                         wfProfileOut( __METHOD__ );
1072                         return self::AS_HOOK_ERROR_EXPECTED;
1073                 }
1074
1075                 # Handle the user preference to force summaries here, but not for null edits
1076                 if ( $this->section != 'new' && !$this->allowBlankSummary && 0 != strcmp( $oldtext, $text )
1077                         && !Title::newFromRedirect( $text ) ) # check if it's not a redirect
1078                 {
1079                         if ( md5( $this->summary ) == $this->autoSumm ) {
1080                                 $this->missingSummary = true;
1081                                 wfProfileOut( __METHOD__ );
1082                                 return self::AS_SUMMARY_NEEDED;
1083                         }
1084                 }
1085
1086                 # And a similar thing for new sections
1087                 if ( $this->section == 'new' && !$this->allowBlankSummary ) {
1088                         if ( trim( $this->summary ) == '' ) {
1089                                 $this->missingSummary = true;
1090                                 wfProfileOut( __METHOD__ );
1091                                 return self::AS_SUMMARY_NEEDED;
1092                         }
1093                 }
1094
1095                 # All's well
1096                 wfProfileIn( __METHOD__ . '-sectionanchor' );
1097                 $sectionanchor = '';
1098                 if ( $this->section == 'new' ) {
1099                         if ( $this->textbox1 == '' ) {
1100                                 $this->missingComment = true;
1101                                 wfProfileOut( __METHOD__ . '-sectionanchor' );
1102                                 wfProfileOut( __METHOD__ );
1103                                 return self::AS_TEXTBOX_EMPTY;
1104                         }
1105                         if ( $this->summary != '' ) {
1106                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $this->summary );
1107                                 # This is a new section, so create a link to the new section
1108                                 # in the revision summary.
1109                                 $cleanSummary = $wgParser->stripSectionName( $this->summary );
1110                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1111                         }
1112                 } elseif ( $this->section != '' ) {
1113                         # Try to get a section anchor from the section source, redirect to edited section if header found
1114                         # XXX: might be better to integrate this into Article::replaceSection
1115                         # for duplicate heading checking and maybe parsing
1116                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1117                         # we can't deal with anchors, includes, html etc in the header for now,
1118                         # headline would need to be parsed to improve this
1119                         if ( $hasmatch and strlen( $matches[2] ) > 0 ) {
1120                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $matches[2] );
1121                         }
1122                 }
1123                 wfProfileOut( __METHOD__ . '-sectionanchor' );
1124
1125                 // Save errors may fall down to the edit form, but we've now
1126                 // merged the section into full text. Clear the section field
1127                 // so that later submission of conflict forms won't try to
1128                 // replace that into a duplicated mess.
1129                 $this->textbox1 = $text;
1130                 $this->section = '';
1131
1132                 // Check for length errors again now that the section is merged in
1133                 $this->kblength = (int)( strlen( $text ) / 1024 );
1134                 if ( $this->kblength > $wgMaxArticleSize ) {
1135                         $this->tooBig = true;
1136                         wfProfileOut( __METHOD__ );
1137                         return self::AS_MAX_ARTICLE_SIZE_EXCEEDED;
1138                 }
1139
1140                 # update the article here
1141                 if ( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
1142                         $this->watchthis, $bot, $sectionanchor ) )
1143                 {
1144                         wfProfileOut( __METHOD__ );
1145                         return self::AS_SUCCESS_UPDATE;
1146                 } else {
1147                         $this->isConflict = true;
1148                 }
1149                 wfProfileOut( __METHOD__ );
1150                 return self::AS_END;
1151         }
1152
1153         /**
1154          * Check if no edits were made by other users since
1155          * the time a user started editing the page. Limit to
1156          * 50 revisions for the sake of performance.
1157          */
1158         protected function userWasLastToEdit( $id, $edittime ) {
1159                 if( !$id ) return false;
1160                 $dbw = wfGetDB( DB_MASTER );
1161                 $res = $dbw->select( 'revision',
1162                         'rev_user',
1163                         array(
1164                                 'rev_page' => $this->mArticle->getId(),
1165                                 'rev_timestamp > '.$dbw->addQuotes( $dbw->timestamp($edittime) )
1166                         ),
1167                         __METHOD__,
1168                         array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
1169                 while( $row = $res->fetchObject() ) {
1170                         if( $row->rev_user != $id ) {
1171                                 return false;
1172                         }
1173                 }
1174                 return true;
1175         }
1176
1177         /**
1178          * Check given input text against $wgSpamRegex, and return the text of the first match.
1179          * @return mixed -- matching string or false
1180          */
1181         public static function matchSpamRegex( $text ) {
1182                 global $wgSpamRegex;
1183                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1184                 $regexes = (array)$wgSpamRegex;
1185                 return self::matchSpamRegexInternal( $text, $regexes );
1186         }
1187
1188         /**
1189          * Check given input text against $wgSpamRegex, and return the text of the first match.
1190          * @return mixed -- matching string or false
1191          */
1192         public static function matchSummarySpamRegex( $text ) {
1193                 global $wgSummarySpamRegex;
1194                 $regexes = (array)$wgSummarySpamRegex;
1195                 return self::matchSpamRegexInternal( $text, $regexes );
1196         }
1197
1198         protected static function matchSpamRegexInternal( $text, $regexes ) {
1199                 foreach( $regexes as $regex ) {
1200                         $matches = array();
1201                         if( preg_match( $regex, $text, $matches ) ) {
1202                                 return $matches[0];
1203                         }
1204                 }
1205                 return false;
1206         }
1207
1208         /**
1209          * Initialise form fields in the object
1210          * Called on the first invocation, e.g. when a user clicks an edit link
1211          * @returns bool -- if the requested section is valid
1212          */
1213         function initialiseForm() {
1214                 global $wgUser;
1215                 $this->edittime = $this->mArticle->getTimestamp();
1216                 $this->textbox1 = $this->getContent( false );
1217                 // activate checkboxes if user wants them to be always active
1218                 # Sort out the "watch" checkbox
1219                 if ( $wgUser->getOption( 'watchdefault' ) ) {
1220                         # Watch all edits
1221                         $this->watchthis = true;
1222                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1223                         # Watch creations
1224                         $this->watchthis = true;
1225                 } elseif ( $this->mTitle->userIsWatching() ) {
1226                         # Already watched
1227                         $this->watchthis = true;
1228                 }
1229                 if ( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
1230                 if ( $this->textbox1 === false ) return false;
1231                 wfProxyCheck();
1232                 return true;
1233         }
1234
1235         function setHeaders() {
1236                 global $wgOut, $wgTitle;
1237                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1238                 if ( $this->formtype == 'preview' ) {
1239                         $wgOut->setPageTitleActionText( wfMsg( 'preview' ) );
1240                 }
1241                 if ( $this->isConflict ) {
1242                         $wgOut->setPageTitle( wfMsg( 'editconflict', $wgTitle->getPrefixedText() ) );
1243                 } elseif ( $this->section != '' ) {
1244                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1245                         $wgOut->setPageTitle( wfMsg( $msg, $wgTitle->getPrefixedText() ) );
1246                 } else {
1247                         # Use the title defined by DISPLAYTITLE magic word when present
1248                         if ( isset( $this->mParserOutput )
1249                          && ( $dt = $this->mParserOutput->getDisplayTitle() ) !== false ) {
1250                                 $title = $dt;
1251                         } else {
1252                                 $title = $wgTitle->getPrefixedText();
1253                         }
1254                         $wgOut->setPageTitle( wfMsg( 'editing', $title ) );
1255                 }
1256         }
1257
1258         /**
1259          * Send the edit form and related headers to $wgOut
1260          * @param $formCallback Optional callable that takes an OutputPage
1261          *                      parameter; will be called during form output
1262          *                      near the top, for captchas and the like.
1263          */
1264         function showEditForm( $formCallback=null ) {
1265                 global $wgOut, $wgUser, $wgTitle;
1266
1267                 # If $wgTitle is null, that means we're in API mode.
1268                 # Some hook probably called this function  without checking
1269                 # for is_null($wgTitle) first. Bail out right here so we don't
1270                 # do lots of work just to discard it right after.
1271                 if ( is_null( $wgTitle ) )
1272                         return;
1273
1274                 wfProfileIn( __METHOD__ );
1275
1276                 $sk = $wgUser->getSkin();
1277
1278                 #need to parse the preview early so that we know which templates are used,
1279                 #otherwise users with "show preview after edit box" will get a blank list
1280                 #we parse this near the beginning so that setHeaders can do the title
1281                 #setting work instead of leaving it in getPreviewText
1282                 $previewOutput = '';
1283                 if ( $this->formtype == 'preview' ) {
1284                         $previewOutput = $this->getPreviewText();
1285                 }
1286
1287                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) );
1288
1289                 $this->setHeaders();
1290
1291                 # Enabled article-related sidebar, toplinks, etc.
1292                 $wgOut->setArticleRelated( true );
1293
1294                 if ( $this->showHeader() === false )
1295                         return;
1296
1297                 $action = htmlspecialchars($this->getActionURL($wgTitle));
1298
1299                 if ( $wgUser->getOption( 'showtoolbar' ) and !$this->isCssJsSubpage ) {
1300                         # prepare toolbar for edit buttons
1301                         $toolbar = EditPage::getEditToolbar();
1302                 } else {
1303                         $toolbar = '';
1304                 }
1305
1306
1307                 $wgOut->addHTML( $this->editFormPageTop );
1308
1309                 if ( $wgUser->getOption( 'previewontop' ) ) {
1310                         $this->displayPreviewArea( $previewOutput, true );
1311                 }
1312
1313                 $wgOut->addHTML( $this->editFormTextTop );
1314
1315                 $templates = $this->getTemplates();
1316                 $formattedtemplates = $sk->formatTemplates( $templates, $this->preview, $this->section != '');
1317
1318                 $hiddencats = $this->mArticle->getHiddenCategories();
1319                 $formattedhiddencats = $sk->formatHiddenCategories( $hiddencats );
1320
1321                 if ( $this->wasDeletedSinceLastEdit() && 'save' != $this->formtype ) {
1322                         $wgOut->wrapWikiMsg(
1323                                 "<div class='error mw-deleted-while-editing'>\n$1</div>",
1324                                 'deletedwhileediting' );
1325                 } elseif ( $this->wasDeletedSinceLastEdit() ) {
1326                         // Hide the toolbar and edit area, user can click preview to get it back
1327                         // Add an confirmation checkbox and explanation.
1328                         $toolbar = '';
1329                         // @todo move this to a cleaner conditional instead of blanking a variable
1330                 }
1331                 $wgOut->addHTML( <<<HTML
1332 {$toolbar}
1333 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1334 HTML
1335 );
1336
1337                 if ( is_callable( $formCallback ) ) {
1338                         call_user_func_array( $formCallback, array( &$wgOut ) );
1339                 }
1340
1341                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1342
1343                 // Put these up at the top to ensure they aren't lost on early form submission
1344                 $this->showFormBeforeText();
1345
1346                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
1347                         $wgOut->addHTML(
1348                                 '<div class="mw-confirm-recreate">' .
1349                                 $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ) ) .
1350                                 Xml::checkLabel( wfMsg( 'recreate' ), 'wpRecreate', 'wpRecreate', false,
1351                                         array( 'title' => $sk->titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
1352                                 ) .
1353                                 '</div>'
1354                         );
1355                 }
1356
1357                 # If a blank edit summary was previously provided, and the appropriate
1358                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1359                 # user being bounced back more than once in the event that a summary
1360                 # is not required.
1361                 #####
1362                 # For a bit more sophisticated detection of blank summaries, hash the
1363                 # automatic one and pass that in the hidden field wpAutoSummary.
1364                 if ( $this->missingSummary ||
1365                         ( $this->section == 'new' && $this->nosummary ) )
1366                                 $wgOut->addHTML( Xml::hidden( 'wpIgnoreBlankSummary', true ) );
1367                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1368                 $wgOut->addHTML( Xml::hidden( 'wpAutoSummary', $autosumm ) );
1369
1370                 $wgOut->addHTML( Xml::hidden( 'oldid', $this->mArticle->getOldID() ) );
1371
1372                 if ( $this->section == 'new' ) {
1373                         $this->showSummaryInput( true, $this->summary );
1374                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
1375                 }
1376
1377                 $wgOut->addHTML( $this->editFormTextBeforeContent );
1378
1379                 if ( $this->isConflict ) {
1380                         // In an edit conflict bypass the overrideable content form method
1381                         // and fallback to the raw wpTextbox1 since editconflicts can't be
1382                         // resolved between page source edits and custom ui edits using the
1383                         // custom edit ui.
1384                         $this->showTextbox1();
1385                 } else {
1386                         $this->showContentForm();
1387                 }
1388
1389                 $wgOut->addHTML( $this->editFormTextAfterContent );
1390
1391                 $wgOut->addWikiText( $this->getCopywarn() );
1392                 if ( isset($this->editFormTextAfterWarn) && $this->editFormTextAfterWarn !== '' )
1393                         $wgOut->addHTML( $this->editFormTextAfterWarn );
1394
1395                 global $wgUseMetadataEdit;
1396                 if ( $wgUseMetadataEdit )
1397                         $this->showMetaData();
1398
1399                 $this->showStandardInputs();
1400
1401                 $this->showFormAfterText();
1402
1403                 $this->showTosSummary();
1404                 $this->showEditTools();
1405
1406                 $wgOut->addHTML( <<<HTML
1407 {$this->editFormTextAfterTools}
1408 <div class='templatesUsed'>
1409 {$formattedtemplates}
1410 </div>
1411 <div class='hiddencats'>
1412 {$formattedhiddencats}
1413 </div>
1414 HTML
1415 );
1416
1417                 if ( $this->isConflict )
1418                         $this->showConflict();
1419
1420                 $wgOut->addHTML( $this->editFormTextBottom );
1421                 $wgOut->addHTML( "</form>\n" );
1422                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1423                         $this->displayPreviewArea( $previewOutput, false );
1424                 }
1425
1426                 wfProfileOut( __METHOD__ );
1427         }
1428
1429         protected function showHeader() {
1430                 global $wgOut, $wgUser, $wgTitle, $wgMaxArticleSize, $wgLang;
1431                 if ( $this->isConflict ) {
1432                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1</div>", 'explainconflict' );
1433                         $this->edittime = $this->mArticle->getTimestamp();
1434                 } else {
1435                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
1436                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
1437                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
1438                                 // Someone is welcome to try refactoring though
1439                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
1440                                 return false;
1441                         }
1442
1443                         if ( $this->section != '' && $this->section != 'new' ) {
1444                                 $matches = array();
1445                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
1446                                         preg_match( "/^(=+)(.+)\\1/mi", $this->textbox1, $matches );
1447                                         if ( !empty( $matches[2] ) ) {
1448                                                 global $wgParser;
1449                                                 $this->summary = "/* " .
1450                                                         $wgParser->stripSectionName(trim($matches[2])) .
1451                                                         " */ ";
1452                                         }
1453                                 }
1454                         }
1455
1456                         if ( $this->missingComment ) {
1457                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1</div>", 'missingcommenttext' );
1458                         }
1459
1460                         if ( $this->missingSummary && $this->section != 'new' ) {
1461                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1</div>", 'missingsummary' );
1462                         }
1463
1464                         if ( $this->missingSummary && $this->section == 'new' ) {
1465                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1</div>", 'missingcommentheader' );
1466                         }
1467
1468                         if ( $this->hookError !== '' ) {
1469                                 $wgOut->addWikiText( $this->hookError );
1470                         }
1471
1472                         if ( !$this->checkUnicodeCompliantBrowser() ) {
1473                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
1474                         }
1475
1476                         if ( isset( $this->mArticle ) && isset( $this->mArticle->mRevision ) ) {
1477                         // Let sysop know that this will make private content public if saved
1478
1479                                 if ( !$this->mArticle->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1480                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n", 'rev-deleted-text-permission' );
1481                                 } else if ( $this->mArticle->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1482                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n", 'rev-deleted-text-view' );
1483                                 }
1484
1485                                 if ( !$this->mArticle->mRevision->isCurrent() ) {
1486                                         $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
1487                                         $wgOut->addWikiMsg( 'editingold' );
1488                                 }
1489                         }
1490                 }
1491
1492                 if ( wfReadOnly() ) {
1493                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
1494                 } elseif ( $wgUser->isAnon() && $this->formtype != 'preview' ) {
1495                         $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
1496                 } else {
1497                         if ( $this->isCssJsSubpage ) {
1498                                 # Check the skin exists
1499                                 if ( !$this->isValidCssJsSubpage ) {
1500                                         $wgOut->addWikiMsg( 'userinvalidcssjstitle', $wgTitle->getSkinFromCssJsSubpage() );
1501                                 }
1502                                 if ( $this->formtype !== 'preview' ) {
1503                                         if ( $this->isCssSubpage )
1504                                                 $wgOut->addWikiMsg( 'usercssyoucanpreview' );
1505                                         if ( $this->isJsSubpage )
1506                                                 $wgOut->addWikiMsg( 'userjsyoucanpreview' );
1507                                 }
1508                         }
1509                 }
1510
1511                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
1512                         # Is the title semi-protected?
1513                         if ( $this->mTitle->isSemiProtected() ) {
1514                                 $noticeMsg = 'semiprotectedpagewarning';
1515                         } else {
1516                                 # Then it must be protected based on static groups (regular)
1517                                 $noticeMsg = 'protectedpagewarning';
1518                         }
1519                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle->getPrefixedText(), '',
1520                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
1521                 }
1522                 if ( $this->mTitle->isCascadeProtected() ) {
1523                         # Is this page under cascading protection from some source pages?
1524                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
1525                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
1526                         $cascadeSourcesCount = count( $cascadeSources );
1527                         if ( $cascadeSourcesCount > 0 ) {
1528                                 # Explain, and list the titles responsible
1529                                 foreach( $cascadeSources as $page ) {
1530                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
1531                                 }
1532                         }
1533                         $notice .= '</div>';
1534                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
1535                 }
1536                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
1537                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle->getPrefixedText(), '',
1538                                 array(  'lim' => 1,
1539                                         'showIfEmpty' => false,
1540                                         'msgKey' => array( 'titleprotectedwarning' ),
1541                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
1542                 }
1543
1544                 if ( $this->kblength === false ) {
1545                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1546                 }
1547
1548                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
1549                         $wgOut->addHTML( "<div class='error' id='mw-edit-longpageerror'>\n" );
1550                         $wgOut->addWikiMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) );
1551                         $wgOut->addHTML( "</div>\n" );
1552                 } elseif ( $this->kblength > 29 ) {
1553                         $wgOut->addHTML( "<div id='mw-edit-longpagewarning'>\n" );
1554                         $wgOut->addWikiMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) );
1555                         $wgOut->addHTML( "</div>\n" );
1556                 }
1557         }
1558
1559         /**
1560          * Standard summary input and label (wgSummary), abstracted so EditPage
1561          * subclasses may reorganize the form.
1562          * Note that you do not need to worry about the label's for=, it will be
1563          * inferred by the id given to the input. You can remove them both by
1564          * passing array( 'id' => false ) to $userInputAttrs.
1565          *
1566          * @param $summary The value of the summary input
1567          * @param $labelText The html to place inside the label
1568          * @param $userInputAttrs An array of attrs to use on the input
1569          * @param $userSpanAttrs An array of attrs to use on the span inside the label
1570          *
1571          * @return array An array in the format array( $label, $input )
1572          */
1573         function getSummaryInput($summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null) {
1574                 $inputAttrs = ( is_array($inputAttrs) ? $inputAttrs : array() ) + array(
1575                         'id' => 'wpSummary',
1576                         'maxlength' => '200',
1577                         'tabindex' => '1',
1578                         'size' => 60,
1579                         'spellcheck' => 'true',
1580                 );
1581
1582                 $spanLabelAttrs = ( is_array($spanLabelAttrs) ? $spanLabelAttrs : array() ) + array(
1583                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
1584                         'id' => "wpSummaryLabel"
1585                 );
1586
1587                 $label = null;
1588                 if ( $labelText ) {
1589                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
1590                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
1591                 }
1592
1593                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
1594
1595                 return array( $label, $input );
1596         }
1597
1598         /**
1599          * @param bool $isSubjectPreview true if this is the section subject/title
1600          *                               up top, or false if this is the comment
1601          *                               summary down below the textarea
1602          * @param string $summary The text of the summary to display
1603          * @return string
1604          */
1605         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
1606                 global $wgOut, $wgContLang;
1607                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
1608                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
1609                 if ( $isSubjectPreview ) {
1610                         if ( $this->nosummary )
1611                                 return;
1612                 } else {
1613                         if ( !$this->mShowSummaryField )
1614                                 return;
1615                 }
1616                 $summary = $wgContLang->recodeForEdit( $summary );
1617                 $labelText = wfMsgExt( $isSubjectPreview ? 'subject' : 'summary', 'parseinline' );
1618                 list($label, $input) = $this->getSummaryInput($summary, $labelText, array( 'class' => $summaryClass ), array());
1619                 $wgOut->addHTML("{$label} {$input}");
1620         }
1621
1622         /**
1623          * @param bool $isSubjectPreview true if this is the section subject/title
1624          *                               up top, or false if this is the comment
1625          *                               summary down below the textarea
1626          * @param string $summary The text of the summary to display
1627          * @return string
1628          */
1629         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
1630                 if ( !$summary || ( !$this->preview && !$this->diff ) )
1631                         return "";
1632
1633                 global $wgParser, $wgUser;
1634                 $sk = $wgUser->getSkin();
1635
1636                 if ( $isSubjectPreview )
1637                         $summary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $summary ) );
1638
1639                 $summary = wfMsgExt( 'subject-preview', 'parseinline' ) . $sk->commentBlock( $summary, $this->mTitle, !!$isSubjectPreview );
1640                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
1641         }
1642
1643         protected function showFormBeforeText() {
1644                 global $wgOut;
1645                 $section = htmlspecialchars( $this->section );
1646                 $wgOut->addHTML( <<<INPUTS
1647 <input type='hidden' value="{$section}" name="wpSection" />
1648 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
1649 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
1650 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
1651
1652 INPUTS
1653                 );
1654                 if ( !$this->checkUnicodeCompliantBrowser() )
1655                         $wgOut->addHTML(Xml::hidden( 'safemode', '1' ));
1656         }
1657
1658         protected function showFormAfterText() {
1659                 global $wgOut, $wgUser;
1660                 /**
1661                  * To make it harder for someone to slip a user a page
1662                  * which submits an edit form to the wiki without their
1663                  * knowledge, a random token is associated with the login
1664                  * session. If it's not passed back with the submission,
1665                  * we won't save the page, or render user JavaScript and
1666                  * CSS previews.
1667                  *
1668                  * For anon editors, who may not have a session, we just
1669                  * include the constant suffix to prevent editing from
1670                  * broken text-mangling proxies.
1671                  */
1672                 $wgOut->addHTML( "\n" . Xml::hidden( "wpEditToken", $wgUser->editToken() ) . "\n" );
1673         }
1674
1675         /**
1676          * Subpage overridable method for printing the form for page content editing
1677          * By default this simply outputs wpTextbox1
1678          * Subclasses can override this to provide a custom UI for editing;
1679          * be it a form, or simply wpTextbox1 with a modified content that will be
1680          * reverse modified when extracted from the post data.
1681          * Note that this is basically the inverse for importContentFormData
1682          *
1683          * @praram WebRequest $request
1684          */
1685         protected function showContentForm() {
1686                 $this->showTextbox1();
1687         }
1688
1689         /**
1690          * Method to output wpTextbox1
1691          * The $textoverride method can be used by subclasses overriding showContentForm
1692          * to pass back to this method.
1693          *
1694          * @param array $customAttribs An array of html attributes to use in the textarea
1695          * @param string $textoverride Optional text to override $this->textarea1 with
1696          */
1697         protected function showTextbox1($customAttribs = null, $textoverride = null) {
1698                 $classes = array(); // Textarea CSS
1699                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
1700                         # Is the title semi-protected?
1701                         if ( $this->mTitle->isSemiProtected() ) {
1702                                 $classes[] = 'mw-textarea-sprotected';
1703                         } else {
1704                                 # Then it must be protected based on static groups (regular)
1705                                 $classes[] = 'mw-textarea-protected';
1706                         }
1707                 }
1708                 $attribs = array( 'tabindex' => 1 );
1709                 if ( is_array($customAttribs) )
1710                         $attribs += $customAttribs;
1711
1712                 if ( $this->wasDeletedSinceLastEdit() )
1713                         $attribs['type'] = 'hidden';
1714                 if ( !empty( $classes ) ) {
1715                         if ( isset($attribs['class']) )
1716                                 $classes[] = $attribs['class'];
1717                         $attribs['class'] = implode( ' ', $classes );
1718                 }
1719
1720                 $this->showTextbox( isset($textoverride) ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
1721         }
1722
1723         protected function showTextbox2() {
1724                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6 ) );
1725         }
1726
1727         protected function showTextbox( $content, $name, $customAttribs = array() ) {
1728                 global $wgOut, $wgUser;
1729
1730                 $wikitext = $this->safeUnicodeOutput( $content );
1731                 if ( $wikitext !== '' ) {
1732                         // Ensure there's a newline at the end, otherwise adding lines
1733                         // is awkward.
1734                         // But don't add a newline if the ext is empty, or Firefox in XHTML
1735                         // mode will show an extra newline. A bit annoying.
1736                         $wikitext .= "\n";
1737                 }
1738
1739                 $attribs = $customAttribs + array(
1740                         'accesskey' => ',',
1741                         'id'   => $name,
1742                         'cols' => $wgUser->getIntOption( 'cols' ),
1743                         'rows' => $wgUser->getIntOption( 'rows' ),
1744                         'style' => '' // avoid php notices when appending for editwidth preference (appending allows customAttribs['style'] to still work
1745                 );
1746
1747                 if ( $wgUser->getOption( 'editwidth' ) )
1748                         $attribs['style'] .= 'width: 100%';
1749
1750                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
1751         }
1752
1753         protected function showMetaData() {
1754                 global $wgOut, $wgContLang, $wgUser;
1755                 $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $this->mMetaData ) );
1756                 $ew = $wgUser->getOption( 'editwidth' ) ? ' style="width:100%"' : '';
1757                 $cols = $wgUser->getIntOption( 'cols' );
1758                 $metadata = wfMsgWikiHtml( 'metadata_help' ) . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
1759                 $wgOut->addHTML( $metadata );
1760         }
1761
1762         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
1763                 global $wgOut;
1764                 $classes = array();
1765                 if ( $isOnTop )
1766                         $classes[] = 'ontop';
1767
1768                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
1769
1770                 if ( $this->formtype != 'preview' )
1771                         $attribs['style'] = 'display: none;';
1772
1773                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
1774
1775                 if ( $this->formtype == 'preview' ) {
1776                         $this->showPreview( $previewOutput );
1777                 }
1778
1779                 $wgOut->addHTML( '</div>' );
1780
1781                 if ( $this->formtype == 'diff') {
1782                         $this->showDiff();
1783                 }
1784         }
1785
1786         /**
1787          * Append preview output to $wgOut.
1788          * Includes category rendering if this is a category page.
1789          *
1790          * @param string $text The HTML to be output for the preview.
1791          */
1792         protected function showPreview( $text ) {
1793                 global $wgOut;
1794                 if ( $this->mTitle->getNamespace() == NS_CATEGORY) {
1795                         $this->mArticle->openShowCategory();
1796                 }
1797                 # This hook seems slightly odd here, but makes things more
1798                 # consistent for extensions.
1799                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
1800                 $wgOut->addHTML( $text );
1801                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
1802                         $this->mArticle->closeShowCategory();
1803                 }
1804         }
1805
1806         protected function showTosSummary() {
1807                 $msg = 'editpage-tos-summary';
1808                 // Give a chance for site and per-namespace customizations of
1809                 // terms of service summary link that might exist separately
1810                 // from the copyright notice.
1811                 //
1812                 // This will display between the save button and the edit tools,
1813                 // so should remain short!
1814                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
1815                 $text = wfMsg( $msg );
1816                 if( !wfEmptyMsg( $msg, $text ) && $text !== '-' ) {
1817                         global $wgOut;
1818                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
1819                         $wgOut->addWikiMsgArray( $msg, array() );
1820                         $wgOut->addHTML( '</div>' );
1821                 }
1822         }
1823
1824         protected function showEditTools() {
1825                 global $wgOut;
1826                 $wgOut->addHTML( '<div class="mw-editTools">' );
1827                 $wgOut->addWikiMsgArray( 'edittools', array(), array( 'content' ) );
1828                 $wgOut->addHTML( '</div>' );
1829         }
1830
1831         protected function getCopywarn() {
1832                 global $wgRightsText;
1833                 if ( $wgRightsText ) {
1834                         $copywarnMsg = array( 'copyrightwarning',
1835                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
1836                                 $wgRightsText );
1837                 } else {
1838                         $copywarnMsg = array( 'copyrightwarning2',
1839                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
1840                 }
1841                 // Allow for site and per-namespace customization of contribution/copyright notice.
1842                 wfRunHooks( 'EditPageCopyrightWarning', array( $this->mTitle, &$copywarnMsg ) );
1843
1844                 return "<div id=\"editpage-copywarn\">\n" . call_user_func_array("wfMsgNoTrans", $copywarnMsg) . "\n</div>";
1845         }
1846
1847         protected function showStandardInputs( &$tabindex = 2 ) {
1848                 global $wgOut, $wgUser;
1849                 $wgOut->addHTML( "<div class='editOptions'>\n" );
1850
1851                 if ( $this->section != 'new' ) {
1852                         $this->showSummaryInput( false, $this->summary );
1853                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
1854                 }
1855
1856                 $checkboxes = $this->getCheckboxes( $tabindex, $wgUser->getSkin(),
1857                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
1858                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
1859                 $wgOut->addHTML( "<div class='editButtons'>\n" );
1860                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
1861
1862                 $cancel = $this->getCancelLink();
1863                 $separator = wfMsgExt( 'pipe-separator' , 'escapenoentities' );
1864                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ) );
1865                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
1866                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
1867                         htmlspecialchars( wfMsg( 'newwindow' ) );
1868                 $wgOut->addHTML( "      <span class='editHelp'>{$cancel}{$separator}{$edithelp}</span>\n" );
1869                 $wgOut->addHTML( "</div><!-- editButtons -->\n</div><!-- editOptions -->\n" );
1870         }
1871
1872         protected function showConflict() {
1873                 global $wgOut;
1874                 $this->textbox2 = $this->textbox1;
1875                 $this->textbox1 = $this->getContent();
1876                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
1877                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
1878
1879                         $de = new DifferenceEngine( $this->mTitle );
1880                         $de->setText( $this->textbox2, $this->textbox1 );
1881                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1882
1883                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
1884                         $this->showTextbox2();
1885                 }
1886         }
1887
1888         protected function getLastDelete() {
1889                 $dbr = wfGetDB( DB_SLAVE );
1890                 $data = $dbr->selectRow(
1891                         array( 'logging', 'user' ),
1892                         array( 'log_type',
1893                                'log_action',
1894                                'log_timestamp',
1895                                'log_user',
1896                                'log_namespace',
1897                                'log_title',
1898                                'log_comment',
1899                                'log_params',
1900                                'log_deleted',
1901                                'user_name' ),
1902                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1903                                'log_title' => $this->mTitle->getDBkey(),
1904                                'log_type' => 'delete',
1905                                'log_action' => 'delete',
1906                                'user_id=log_user' ),
1907                         __METHOD__,
1908                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
1909                 );
1910                 // Quick paranoid permission checks...
1911                 if( is_object( $data ) ) {
1912                         if( $data->log_deleted & LogPage::DELETED_USER )
1913                                 $data->user_name = wfMsgHtml( 'rev-deleted-user' );
1914                         if( $data->log_deleted & LogPage::DELETED_COMMENT )
1915                                 $data->log_comment = wfMsgHtml( 'rev-deleted-comment' );
1916                 }
1917                 return $data;
1918         }
1919
1920         /**
1921          * Get the rendered text for previewing.
1922          * @return string
1923          */
1924         function getPreviewText() {
1925                 global $wgOut, $wgUser, $wgTitle, $wgParser, $wgLang, $wgContLang, $wgMessageCache;
1926
1927                 wfProfileIn( __METHOD__ );
1928
1929                 if ( $this->mTriedSave && !$this->mTokenOk ) {
1930                         if ( $this->mTokenOkExceptSuffix ) {
1931                                 $note = wfMsg( 'token_suffix_mismatch' );
1932                         } else {
1933                                 $note = wfMsg( 'session_fail_preview' );
1934                         }
1935                 } else {
1936                         $note = wfMsg( 'previewnote' );
1937                 }
1938
1939                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1940                 $parserOptions->setEditSection( false );
1941                 $parserOptions->setIsPreview( true );
1942                 $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
1943
1944                 global $wgRawHtml;
1945                 if ( $wgRawHtml && !$this->mTokenOk ) {
1946                         // Could be an offsite preview attempt. This is very unsafe if
1947                         // HTML is enabled, as it could be an attack.
1948                         return $wgOut->parse( "<div class='previewnote'>" .
1949                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1950                 }
1951
1952                 # don't parse user css/js, show message about preview
1953                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1954
1955                 if ( $this->isCssJsSubpage ) {
1956                         if (preg_match( "/\\.css$/", $this->mTitle->getText() ) ) {
1957                                 $previewtext = wfMsg( 'usercsspreview' );
1958                         } else if (preg_match( "/\\.js$/", $this->mTitle->getText() ) ) {
1959                                 $previewtext = wfMsg( 'userjspreview' );
1960                         }
1961                         $parserOptions->setTidy( true );
1962                         $parserOutput = $wgParser->parse( $previewtext, $this->mTitle, $parserOptions );
1963                         $previewHTML = $parserOutput->mText;
1964                 } elseif ( $rt = Title::newFromRedirectArray( $this->textbox1 ) ) {
1965                         $previewHTML = $this->mArticle->viewRedirect( $rt, false );
1966                 } else {
1967                         $toparse = $this->textbox1;
1968
1969                         # If we're adding a comment, we need to show the
1970                         # summary as the headline
1971                         if ( $this->section == "new" && $this->summary != "" ) {
1972                                 $toparse="== {$this->summary} ==\n\n" . $toparse;
1973                         }
1974
1975                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData;
1976
1977                         // Parse mediawiki messages with correct target language
1978                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1979                                 list( /* $unused */, $lang ) = $wgMessageCache->figureMessage( $this->mTitle->getText() );
1980                                 $obj = wfGetLangObj( $lang );
1981                                 $parserOptions->setTargetLanguage( $obj );
1982                         }
1983
1984
1985                         $parserOptions->setTidy( true );
1986                         $parserOptions->enableLimitReport();
1987                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ),
1988                                         $this->mTitle, $parserOptions );
1989
1990                         $previewHTML = $parserOutput->getText();
1991                         $this->mParserOutput = $parserOutput;
1992                         $wgOut->addParserOutputNoText( $parserOutput );
1993
1994                         if ( count( $parserOutput->getWarnings() ) ) {
1995                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
1996                         }
1997                 }
1998
1999                 if( $this->isConflict ) {
2000                         $conflict = '<h2 id="mw-previewconflict">' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
2001                 } else {
2002                         $conflict = '<hr />';
2003                 }
2004
2005                 $previewhead = "<div class='previewnote'>\n" .
2006                         '<h2 id="mw-previewheader">' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>" .
2007                         $wgOut->parse( $note ) . $conflict . "</div>\n";
2008
2009                 wfProfileOut( __METHOD__ );
2010                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
2011         }
2012
2013         function getTemplates() {
2014                 if ( $this->preview || $this->section != '' ) {
2015                         $templates = array();
2016                         if ( !isset( $this->mParserOutput ) ) return $templates;
2017                         foreach( $this->mParserOutput->getTemplates() as $ns => $template) {
2018                                 foreach( array_keys( $template ) as $dbk ) {
2019                                         $templates[] = Title::makeTitle($ns, $dbk);
2020                                 }
2021                         }
2022                         return $templates;
2023                 } else {
2024                         return $this->mArticle->getUsedTemplates();
2025                 }
2026         }
2027
2028         /**
2029          * Call the stock "user is blocked" page
2030          */
2031         function blockedPage() {
2032                 global $wgOut;
2033                 $wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
2034
2035                 # If the user made changes, preserve them when showing the markup
2036                 # (This happens when a user is blocked during edit, for instance)
2037                 $first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
2038                 if ( $first ) {
2039                         $source = $this->mTitle->exists() ? $this->getContent() : false;
2040                 } else {
2041                         $source = $this->textbox1;
2042                 }
2043
2044                 # Spit out the source or the user's modified version
2045                 if ( $source !== false ) {
2046                         $wgOut->addHTML( '<hr />' );
2047                         $wgOut->addWikiMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() );
2048                         $this->showTextbox1( array( 'readonly' ), $source );
2049                 }
2050         }
2051
2052         /**
2053          * Produce the stock "please login to edit pages" page
2054          */
2055         function userNotLoggedInPage() {
2056                 global $wgUser, $wgOut, $wgTitle;
2057                 $skin = $wgUser->getSkin();
2058
2059                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
2060                 $loginLink = $skin->link(
2061                         $loginTitle,
2062                         wfMsgHtml( 'loginreqlink' ),
2063                         array(),
2064                         array( 'returnto' => $wgTitle->getPrefixedText() ),
2065                         array( 'known', 'noclasses' )
2066                 );
2067
2068                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
2069                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2070                 $wgOut->setArticleRelated( false );
2071
2072                 $wgOut->addHTML( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
2073                 $wgOut->returnToMain( false, $wgTitle );
2074         }
2075
2076         /**
2077          * Creates a basic error page which informs the user that
2078          * they have attempted to edit a nonexistent section.
2079          */
2080         function noSuchSectionPage() {
2081                 global $wgOut;
2082
2083                 $wgOut->setPageTitle( wfMsg( 'nosuchsectiontitle' ) );
2084                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2085                 $wgOut->setArticleRelated( false );
2086
2087                 $res = wfMsgExt( 'nosuchsectiontext', 'parse', $this->section );
2088                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
2089                 $wgOut->addHTML( $res );
2090
2091                 $wgOut->returnToMain( false, $this->mTitle );
2092         }
2093
2094         /**
2095          * Produce the stock "your edit contains spam" page
2096          *
2097          * @param $match Text which triggered one or more filters
2098          */
2099         function spamPage( $match = false ) {
2100                 global $wgOut, $wgTitle;
2101
2102                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
2103                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2104                 $wgOut->setArticleRelated( false );
2105
2106                 $wgOut->addHTML( '<div id="spamprotected">' );
2107                 $wgOut->addWikiMsg( 'spamprotectiontext' );
2108                 if ( $match )
2109                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
2110                 $wgOut->addHTML( '</div>' );
2111
2112                 $wgOut->returnToMain( false, $wgTitle );
2113         }
2114
2115         /**
2116          * @private
2117          * @todo document
2118          */
2119         function mergeChangesInto( &$editText ){
2120                 wfProfileIn( __METHOD__ );
2121
2122                 $db = wfGetDB( DB_MASTER );
2123
2124                 // This is the revision the editor started from
2125                 $baseRevision = $this->getBaseRevision();
2126                 if ( is_null( $baseRevision ) ) {
2127                         wfProfileOut( __METHOD__ );
2128                         return false;
2129                 }
2130                 $baseText = $baseRevision->getText();
2131
2132                 // The current state, we want to merge updates into it
2133                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2134                 if ( is_null( $currentRevision ) ) {
2135                         wfProfileOut( __METHOD__ );
2136                         return false;
2137                 }
2138                 $currentText = $currentRevision->getText();
2139
2140                 $result = '';
2141                 if ( wfMerge( $baseText, $editText, $currentText, $result ) ) {
2142                         $editText = $result;
2143                         wfProfileOut( __METHOD__ );
2144                         return true;
2145                 } else {
2146                         wfProfileOut( __METHOD__ );
2147                         return false;
2148                 }
2149         }
2150
2151         /**
2152          * Check if the browser is on a blacklist of user-agents known to
2153          * mangle UTF-8 data on form submission. Returns true if Unicode
2154          * should make it through, false if it's known to be a problem.
2155          * @return bool
2156          * @private
2157          */
2158         function checkUnicodeCompliantBrowser() {
2159                 global $wgBrowserBlackList;
2160                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
2161                         // No User-Agent header sent? Trust it by default...
2162                         return true;
2163                 }
2164                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
2165                 foreach ( $wgBrowserBlackList as $browser ) {
2166                         if ( preg_match($browser, $currentbrowser) ) {
2167                                 return false;
2168                         }
2169                 }
2170                 return true;
2171         }
2172
2173         /**
2174          * @deprecated use $wgParser->stripSectionName()
2175          */
2176         function pseudoParseSectionAnchor( $text ) {
2177                 global $wgParser;
2178                 return $wgParser->stripSectionName( $text );
2179         }
2180
2181         /**
2182          * Format an anchor fragment as it would appear for a given section name
2183          * @param string $text
2184          * @return string
2185          * @private
2186          */
2187         function sectionAnchor( $text ) {
2188                 global $wgParser;
2189                 return $wgParser->guessSectionNameFromWikiText( $text );
2190         }
2191
2192         /**
2193          * Shows a bulletin board style toolbar for common editing functions.
2194          * It can be disabled in the user preferences.
2195          * The necessary JavaScript code can be found in skins/common/edit.js.
2196          *
2197          * @return string
2198          */
2199         static function getEditToolbar() {
2200                 global $wgStylePath, $wgContLang, $wgLang;
2201
2202                 /**
2203
2204                  * toolarray an array of arrays which each include the filename of
2205                  * the button image (without path), the opening tag, the closing tag,
2206                  * and optionally a sample text that is inserted between the two when no
2207                  * selection is highlighted.
2208                  * The tip text is shown when the user moves the mouse over the button.
2209                  *
2210                  * Already here are accesskeys (key), which are not used yet until someone
2211                  * can figure out a way to make them work in IE. However, we should make
2212                  * sure these keys are not defined on the edit page.
2213                  */
2214                 $toolarray = array(
2215                         array(
2216                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
2217                                 'id'     => 'mw-editbutton-bold',
2218                                 'open'   => '\'\'\'',
2219                                 'close'  => '\'\'\'',
2220                                 'sample' => wfMsg( 'bold_sample' ),
2221                                 'tip'    => wfMsg( 'bold_tip' ),
2222                                 'key'    => 'B'
2223                         ),
2224                         array(
2225                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
2226                                 'id'     => 'mw-editbutton-italic',
2227                                 'open'   => '\'\'',
2228                                 'close'  => '\'\'',
2229                                 'sample' => wfMsg( 'italic_sample' ),
2230                                 'tip'    => wfMsg( 'italic_tip' ),
2231                                 'key'    => 'I'
2232                         ),
2233                         array(
2234                                 'image'  => $wgLang->getImageFile( 'button-link' ),
2235                                 'id'     => 'mw-editbutton-link',
2236                                 'open'   => '[[',
2237                                 'close'  => ']]',
2238                                 'sample' => wfMsg( 'link_sample' ),
2239                                 'tip'    => wfMsg( 'link_tip' ),
2240                                 'key'    => 'L'
2241                         ),
2242                         array(
2243                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
2244                                 'id'     => 'mw-editbutton-extlink',
2245                                 'open'   => '[',
2246                                 'close'  => ']',
2247                                 'sample' => wfMsg( 'extlink_sample' ),
2248                                 'tip'    => wfMsg( 'extlink_tip' ),
2249                                 'key'    => 'X'
2250                         ),
2251                         array(
2252                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
2253                                 'id'     => 'mw-editbutton-headline',
2254                                 'open'   => "\n== ",
2255                                 'close'  => " ==\n",
2256                                 'sample' => wfMsg( 'headline_sample' ),
2257                                 'tip'    => wfMsg( 'headline_tip' ),
2258                                 'key'    => 'H'
2259                         ),
2260                         array(
2261                                 'image'  => $wgLang->getImageFile( 'button-image' ),
2262                                 'id'     => 'mw-editbutton-image',
2263                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
2264                                 'close'  => ']]',
2265                                 'sample' => wfMsg( 'image_sample' ),
2266                                 'tip'    => wfMsg( 'image_tip' ),
2267                                 'key'    => 'D'
2268                         ),
2269                         array(
2270                                 'image'  => $wgLang->getImageFile( 'button-media' ),
2271                                 'id'     => 'mw-editbutton-media',
2272                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
2273                                 'close'  => ']]',
2274                                 'sample' => wfMsg( 'media_sample' ),
2275                                 'tip'    => wfMsg( 'media_tip' ),
2276                                 'key'    => 'M'
2277                         ),
2278                         array(
2279                                 'image'  => $wgLang->getImageFile( 'button-math' ),
2280                                 'id'     => 'mw-editbutton-math',
2281                                 'open'   => "<math>",
2282                                 'close'  => "</math>",
2283                                 'sample' => wfMsg( 'math_sample' ),
2284                                 'tip'    => wfMsg( 'math_tip' ),
2285                                 'key'    => 'C'
2286                         ),
2287                         array(
2288                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
2289                                 'id'     => 'mw-editbutton-nowiki',
2290                                 'open'   => "<nowiki>",
2291                                 'close'  => "</nowiki>",
2292                                 'sample' => wfMsg( 'nowiki_sample' ),
2293                                 'tip'    => wfMsg( 'nowiki_tip' ),
2294                                 'key'    => 'N'
2295                         ),
2296                         array(
2297                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
2298                                 'id'     => 'mw-editbutton-signature',
2299                                 'open'   => '--~~~~',
2300                                 'close'  => '',
2301                                 'sample' => '',
2302                                 'tip'    => wfMsg( 'sig_tip' ),
2303                                 'key'    => 'Y'
2304                         ),
2305                         array(
2306                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
2307                                 'id'     => 'mw-editbutton-hr',
2308                                 'open'   => "\n----\n",
2309                                 'close'  => '',
2310                                 'sample' => '',
2311                                 'tip'    => wfMsg( 'hr_tip' ),
2312                                 'key'    => 'R'
2313                         )
2314                 );
2315                 $toolbar = "<div id='toolbar'>\n";
2316
2317                 $script = '';
2318                 foreach ( $toolarray as $tool ) {
2319                         $params = array(
2320                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
2321                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
2322                                 // Older browsers show a "speedtip" type message only for ALT.
2323                                 // Ideally these should be different, realistically they
2324                                 // probably don't need to be.
2325                                 $tip = $tool['tip'],
2326                                 $open = $tool['open'],
2327                                 $close = $tool['close'],
2328                                 $sample = $tool['sample'],
2329                                 $cssId = $tool['id'],
2330                         );
2331
2332                         $paramList = implode( ',',
2333                                 array_map( array( 'Xml', 'encodeJsVar' ), $params ) );
2334                         $script .= "addButton($paramList);\n";
2335                 }
2336                 $toolbar .= Html::inlineScript( "\n$script\n" );
2337
2338                 $toolbar .= "\n</div>";
2339
2340                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
2341
2342                 return $toolbar;
2343         }
2344
2345         /**
2346          * Returns an array of html code of the following checkboxes:
2347          * minor and watch
2348          *
2349          * @param $tabindex Current tabindex
2350          * @param $skin Skin object
2351          * @param $checked Array of checkbox => bool, where bool indicates the checked
2352          *                 status of the checkbox
2353          *
2354          * @return array
2355          */
2356         public function getCheckboxes( &$tabindex, $skin, $checked ) {
2357                 global $wgUser;
2358
2359                 $checkboxes = array();
2360
2361                 $checkboxes['minor'] = '';
2362                 $minorLabel = wfMsgExt( 'minoredit', array( 'parseinline' ) );
2363                 if ( $wgUser->isAllowed( 'minoredit' ) ) {
2364                         $attribs = array(
2365                                 'tabindex'  => ++$tabindex,
2366                                 'accesskey' => wfMsg( 'accesskey-minoredit' ),
2367                                 'id'        => 'wpMinoredit',
2368                         );
2369                         $checkboxes['minor'] =
2370                                 Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
2371                                 "&nbsp;<label for='wpMinoredit'" . $skin->tooltip( 'minoredit', 'withaccess' ) . ">{$minorLabel}</label>";
2372                 }
2373
2374                 $watchLabel = wfMsgExt( 'watchthis', array( 'parseinline' ) );
2375                 $checkboxes['watch'] = '';
2376                 if ( $wgUser->isLoggedIn() ) {
2377                         $attribs = array(
2378                                 'tabindex'  => ++$tabindex,
2379                                 'accesskey' => wfMsg( 'accesskey-watch' ),
2380                                 'id'        => 'wpWatchthis',
2381                         );
2382                         $checkboxes['watch'] =
2383                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
2384                                 "&nbsp;<label for='wpWatchthis'" . $skin->tooltip( 'watch', 'withaccess' ) . ">{$watchLabel}</label>";
2385                 }
2386                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
2387                 return $checkboxes;
2388         }
2389
2390         /**
2391          * Returns an array of html code of the following buttons:
2392          * save, diff, preview and live
2393          *
2394          * @param $tabindex Current tabindex
2395          *
2396          * @return array
2397          */
2398         public function getEditButtons(&$tabindex) {
2399                 $buttons = array();
2400
2401                 $temp = array(
2402                         'id'        => 'wpSave',
2403                         'name'      => 'wpSave',
2404                         'type'      => 'submit',
2405                         'tabindex'  => ++$tabindex,
2406                         'value'     => wfMsg( 'savearticle' ),
2407                         'accesskey' => wfMsg( 'accesskey-save' ),
2408                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
2409                 );
2410                 $buttons['save'] = Xml::element('input', $temp, '');
2411
2412                 ++$tabindex; // use the same for preview and live preview
2413                 $temp = array(
2414                         'id'        => 'wpPreview',
2415                         'name'      => 'wpPreview',
2416                         'type'      => 'submit',
2417                         'tabindex'  => $tabindex,
2418                         'value'     => wfMsg( 'showpreview' ),
2419                         'accesskey' => wfMsg( 'accesskey-preview' ),
2420                         'title'     => wfMsg( 'tooltip-preview' ) . ' [' . wfMsg( 'accesskey-preview' ) . ']',
2421                 );
2422                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
2423                 $buttons['live'] = '';
2424
2425                 $temp = array(
2426                         'id'        => 'wpDiff',
2427                         'name'      => 'wpDiff',
2428                         'type'      => 'submit',
2429                         'tabindex'  => ++$tabindex,
2430                         'value'     => wfMsg( 'showdiff' ),
2431                         'accesskey' => wfMsg( 'accesskey-diff' ),
2432                         'title'     => wfMsg( 'tooltip-diff' ) . ' [' . wfMsg( 'accesskey-diff' ) . ']',
2433                 );
2434                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
2435
2436                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
2437                 return $buttons;
2438         }
2439
2440         /**
2441          * Output preview text only. This can be sucked into the edit page
2442          * via JavaScript, and saves the server time rendering the skin as
2443          * well as theoretically being more robust on the client (doesn't
2444          * disturb the edit box's undo history, won't eat your text on
2445          * failure, etc).
2446          *
2447          * @todo This doesn't include category or interlanguage links.
2448          *       Would need to enhance it a bit, <s>maybe wrap them in XML
2449          *       or something...</s> that might also require more skin
2450          *       initialization, so check whether that's a problem.
2451          */
2452         function livePreview() {
2453                 global $wgOut;
2454                 $wgOut->disable();
2455                 header( 'Content-type: text/xml; charset=utf-8' );
2456                 header( 'Cache-control: no-cache' );
2457
2458                 $previewText = $this->getPreviewText();
2459                 #$categories = $skin->getCategoryLinks();
2460
2461                 $s =
2462                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
2463                 Xml::tags( 'livepreview', null,
2464                         Xml::element( 'preview', null, $previewText )
2465                         #.      Xml::element( 'category', null, $categories )
2466                 );
2467                 echo $s;
2468         }
2469
2470
2471         public function getCancelLink() {
2472                 global $wgUser, $wgTitle;
2473
2474                 $cancelParams = array();
2475                 if ( !$this->isConflict && $this->mArticle->getOldID() > 0 ) {
2476                         $cancelParams['oldid'] = $this->mArticle->getOldID();
2477                 }
2478
2479                 return $wgUser->getSkin()->link(
2480                         $wgTitle,
2481                         wfMsgExt( 'cancel', array( 'parseinline' ) ),
2482                         array( 'id' => 'mw-editform-cancel' ),
2483                         $cancelParams,
2484                         array( 'known', 'noclasses' )
2485                 );
2486         }
2487
2488         /**
2489          * Get a diff between the current contents of the edit box and the
2490          * version of the page we're editing from.
2491          *
2492          * If this is a section edit, we'll replace the section as for final
2493          * save and then make a comparison.
2494          */
2495         function showDiff() {
2496                 $oldtext = $this->mArticle->fetchContent();
2497                 $newtext = $this->mArticle->replaceSection(
2498                         $this->section, $this->textbox1, $this->summary, $this->edittime );
2499                 $newtext = $this->mArticle->preSaveTransform( $newtext );
2500                 $oldtitle = wfMsgExt( 'currentrev', array( 'parseinline' ) );
2501                 $newtitle = wfMsgExt( 'yourtext', array( 'parseinline' ) );
2502                 if ( $oldtext !== false  || $newtext != '' ) {
2503                         $de = new DifferenceEngine( $this->mTitle );
2504                         $de->setText( $oldtext, $newtext );
2505                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2506                         $de->showDiffStyle();
2507                 } else {
2508                         $difftext = '';
2509                 }
2510
2511                 global $wgOut;
2512                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2513         }
2514
2515         /**
2516          * Filter an input field through a Unicode de-armoring process if it
2517          * came from an old browser with known broken Unicode editing issues.
2518          *
2519          * @param WebRequest $request
2520          * @param string $field
2521          * @return string
2522          * @private
2523          */
2524         function safeUnicodeInput( $request, $field ) {
2525                 $text = rtrim( $request->getText( $field ) );
2526                 return $request->getBool( 'safemode' )
2527                         ? $this->unmakesafe( $text )
2528                         : $text;
2529         }
2530
2531         function safeUnicodeText( $request, $text ) {
2532                 $text = rtrim( $text );
2533                 return $request->getBool( 'safemode' )
2534                         ? $this->unmakesafe( $text )
2535                         : $text;
2536         }
2537
2538         /**
2539          * Filter an output field through a Unicode armoring process if it is
2540          * going to an old browser with known broken Unicode editing issues.
2541          *
2542          * @param string $text
2543          * @return string
2544          * @private
2545          */
2546         function safeUnicodeOutput( $text ) {
2547                 global $wgContLang;
2548                 $codedText = $wgContLang->recodeForEdit( $text );
2549                 return $this->checkUnicodeCompliantBrowser()
2550                         ? $codedText
2551                         : $this->makesafe( $codedText );
2552         }
2553
2554         /**
2555          * A number of web browsers are known to corrupt non-ASCII characters
2556          * in a UTF-8 text editing environment. To protect against this,
2557          * detected browsers will be served an armored version of the text,
2558          * with non-ASCII chars converted to numeric HTML character references.
2559          *
2560          * Preexisting such character references will have a 0 added to them
2561          * to ensure that round-trips do not alter the original data.
2562          *
2563          * @param string $invalue
2564          * @return string
2565          * @private
2566          */
2567         function makesafe( $invalue ) {
2568                 // Armor existing references for reversability.
2569                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
2570
2571                 $bytesleft = 0;
2572                 $result = "";
2573                 $working = 0;
2574                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2575                         $bytevalue = ord( $invalue{$i} );
2576                         if ( $bytevalue <= 0x7F ) { //0xxx xxxx
2577                                 $result .= chr( $bytevalue );
2578                                 $bytesleft = 0;
2579                         } elseif ( $bytevalue <= 0xBF ) { //10xx xxxx
2580                                 $working = $working << 6;
2581                                 $working += ($bytevalue & 0x3F);
2582                                 $bytesleft--;
2583                                 if ( $bytesleft <= 0 ) {
2584                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
2585                                 }
2586                         } elseif ( $bytevalue <= 0xDF ) { //110x xxxx
2587                                 $working = $bytevalue & 0x1F;
2588                                 $bytesleft = 1;
2589                         } elseif ( $bytevalue <= 0xEF ) { //1110 xxxx
2590                                 $working = $bytevalue & 0x0F;
2591                                 $bytesleft = 2;
2592                         } else { //1111 0xxx
2593                                 $working = $bytevalue & 0x07;
2594                                 $bytesleft = 3;
2595                         }
2596                 }
2597                 return $result;
2598         }
2599
2600         /**
2601          * Reverse the previously applied transliteration of non-ASCII characters
2602          * back to UTF-8. Used to protect data from corruption by broken web browsers
2603          * as listed in $wgBrowserBlackList.
2604          *
2605          * @param string $invalue
2606          * @return string
2607          * @private
2608          */
2609         function unmakesafe( $invalue ) {
2610                 $result = "";
2611                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2612                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
2613                                 $i += 3;
2614                                 $hexstring = "";
2615                                 do {
2616                                         $hexstring .= $invalue{$i};
2617                                         $i++;
2618                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
2619
2620                                 // Do some sanity checks. These aren't needed for reversability,
2621                                 // but should help keep the breakage down if the editor
2622                                 // breaks one of the entities whilst editing.
2623                                 if ( (substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6) ) {
2624                                         $codepoint = hexdec($hexstring);
2625                                         $result .= codepointToUtf8( $codepoint );
2626                                 } else {
2627                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
2628                                 }
2629                         } else {
2630                                 $result .= substr( $invalue, $i, 1 );
2631                         }
2632                 }
2633                 // reverse the transform that we made for reversability reasons.
2634                 return strtr( $result, array( "&#x0" => "&#x" ) );
2635         }
2636
2637         function noCreatePermission() {
2638                 global $wgOut;
2639                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
2640                 $wgOut->addWikiMsg( 'nocreatetext' );
2641         }
2642
2643         /**
2644          * Attempt submission
2645          * @return bool false if output is done, true if the rest of the form should be displayed
2646          */
2647         function attemptSave() {
2648                 global $wgUser, $wgOut, $wgTitle;
2649
2650                 $resultDetails = false;
2651                 # Allow bots to exempt some edits from bot flagging
2652                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
2653                 $value = $this->internalAttemptSave( $resultDetails, $bot );
2654
2655                 if ( $value == self::AS_SUCCESS_UPDATE || $value == self::AS_SUCCESS_NEW_ARTICLE ) {
2656                         $this->didSave = true;
2657                 }
2658
2659                 switch ( $value ) {
2660                         case self::AS_HOOK_ERROR_EXPECTED:
2661                         case self::AS_CONTENT_TOO_BIG:
2662                         case self::AS_ARTICLE_WAS_DELETED:
2663                         case self::AS_CONFLICT_DETECTED:
2664                         case self::AS_SUMMARY_NEEDED:
2665                         case self::AS_TEXTBOX_EMPTY:
2666                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
2667                         case self::AS_END:
2668                                 return true;
2669
2670                         case self::AS_HOOK_ERROR:
2671                         case self::AS_FILTERING:
2672                         case self::AS_SUCCESS_NEW_ARTICLE:
2673                         case self::AS_SUCCESS_UPDATE:
2674                                 return false;
2675
2676                         case self::AS_SPAM_ERROR:
2677                                 $this->spamPage( $resultDetails['spam'] );
2678                                 return false;
2679
2680                         case self::AS_BLOCKED_PAGE_FOR_USER:
2681                                 $this->blockedPage();
2682                                 return false;
2683
2684                         case self::AS_IMAGE_REDIRECT_ANON:
2685                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
2686                                 return false;
2687
2688                         case self::AS_READ_ONLY_PAGE_ANON:
2689                                 $this->userNotLoggedInPage();
2690                                 return false;
2691
2692                         case self::AS_READ_ONLY_PAGE_LOGGED:
2693                         case self::AS_READ_ONLY_PAGE:
2694                                 $wgOut->readOnlyPage();
2695                                 return false;
2696
2697                         case self::AS_RATE_LIMITED:
2698                                 $wgOut->rateLimited();
2699                                 return false;
2700
2701                         case self::AS_NO_CREATE_PERMISSION:
2702                                 $this->noCreatePermission();
2703                                 return;
2704
2705                         case self::AS_BLANK_ARTICLE:
2706                                 $wgOut->redirect( $wgTitle->getFullURL() );
2707                                 return false;
2708
2709                         case self::AS_IMAGE_REDIRECT_LOGGED:
2710                                 $wgOut->permissionRequired( 'upload' );
2711                                 return false;
2712                 }
2713         }
2714
2715         function getBaseRevision() {
2716                 if ( $this->mBaseRevision == false ) {
2717                         $db = wfGetDB( DB_MASTER );
2718                         $baseRevision = Revision::loadFromTimestamp(
2719                                 $db, $this->mTitle, $this->edittime );
2720                         return $this->mBaseRevision = $baseRevision;
2721                 } else {
2722                         return $this->mBaseRevision;
2723                 }
2724         }
2725 }