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