includes/EditPage.php

   1 <?php
   2 /**
   3  * Contains the EditPage class
   4  * @file
   5  */
   6
   7 /**
   8  * The edit page/HTML interface (split from Article)
   9  * The actual database and text munging is still in Article,
  10  * but it should get easier to call those from alternate
  11  * interfaces.
  12  *
  13  * EditPage cares about two distinct titles:
  14  * $wgTitle is the page that forms submit to, links point to,
  15  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  16  * page in the database that is actually being edited. These are
  17  * usually the same, but they are now allowed to be different.
  18  */
  19 class EditPage {
  20         const AS_SUCCESS_UPDATE                 = 200;
  21         const AS_SUCCESS_NEW_ARTICLE            = 201;
  22         const AS_HOOK_ERROR                     = 210;
  23         const AS_FILTERING                      = 211;
  24         const AS_HOOK_ERROR_EXPECTED            = 212;
  25         const AS_BLOCKED_PAGE_FOR_USER          = 215;
  26         const AS_CONTENT_TOO_BIG                = 216;
  27         const AS_USER_CANNOT_EDIT               = 217;
  28         const AS_READ_ONLY_PAGE_ANON            = 218;
  29         const AS_READ_ONLY_PAGE_LOGGED          = 219;
  30         const AS_READ_ONLY_PAGE                 = 220;
  31         const AS_RATE_LIMITED                   = 221;
  32         const AS_ARTICLE_WAS_DELETED            = 222;
  33         const AS_NO_CREATE_PERMISSION           = 223;
  34         const AS_BLANK_ARTICLE                  = 224;
  35         const AS_CONFLICT_DETECTED              = 225;
  36         const AS_SUMMARY_NEEDED                 = 226;
  37         const AS_TEXTBOX_EMPTY                  = 228;
  38         const AS_MAX_ARTICLE_SIZE_EXCEEDED      = 229;
  39         const AS_OK                             = 230;
  40         const AS_END                            = 231;
  41         const AS_SPAM_ERROR                     = 232;
  42         const AS_IMAGE_REDIRECT_ANON            = 233;
  43         const AS_IMAGE_REDIRECT_LOGGED          = 234;
  44
  45         var $mArticle;
  46         var $mTitle;
  47         var $action;
  48         var $mMetaData = '';
  49         var $isConflict = false;
  50         var $isCssJsSubpage = false;
  51         var $isCssSubpage = false;
  52         var $isJsSubpage = false;
  53         var $deletedSinceEdit = false;
  54         var $formtype;
  55         var $firsttime;
  56         var $lastDelete;
  57         var $mTokenOk = false;
  58         var $mTokenOkExceptSuffix = false;
  59         var $mTriedSave = false;
  60         var $tooBig = false;
  61         var $kblength = false;
  62         var $missingComment = false;
  63         var $missingSummary = false;
  64         var $allowBlankSummary = false;
  65         var $autoSumm = '';
  66         var $hookError = '';
  67         #var $mPreviewTemplates;
  68         var $mParserOutput;
  69         var $mBaseRevision = false;
  70
  71         # Form values
  72         var $save = false, $preview = false, $diff = false;
  73         var $minoredit = false, $watchthis = false, $recreate = false;
  74         var $textbox1 = '', $textbox2 = '', $summary = '';
  75         var $edittime = '', $section = '', $starttime = '';
  76         var $oldid = 0, $editintro = '', $scrolltop = null;
  77
  78         # Placeholders for text injection by hooks (must be HTML)
  79         # extensions should take care to _append_ to the present value
  80         public $editFormPageTop; // Before even the preview
  81         public $editFormTextTop;
  82         public $editFormTextBeforeContent;
  83         public $editFormTextAfterWarn;
  84         public $editFormTextAfterTools;
  85         public $editFormTextBottom;
  86
  87         /* $didSave should be set to true whenever an article was succesfully altered. */
  88         public $didSave = false;
  89         public $undidRev = 0;
  90
  91         public $suppressIntro = false;
  92
  93         /**
  94          * @todo document
  95          * @param $article
  96          */
  97         function EditPage( $article ) {
  98                 $this->mArticle =& $article;
  99                 $this->mTitle = $article->getTitle();
 100                 $this->action = 'submit';
 101
 102                 # Placeholders for text injection by hooks (empty per default)
 103                 $this->editFormPageTop =
 104                 $this->editFormTextTop =
 105                 $this->editFormTextBeforeContent =
 106                 $this->editFormTextAfterWarn =
 107                 $this->editFormTextAfterTools =
 108                 $this->editFormTextBottom =
 109                 $this->mPreloadText = "";
 110         }
 111
 112         function getArticle() {
 113                 return $this->mArticle;
 114         }
 115
 116
 117         /**
 118          * Fetch initial editing page content.
 119          * @private
 120          */
 121         function getContent( $def_text = '' ) {
 122                 global $wgOut, $wgRequest, $wgParser, $wgContLang, $wgMessageCache;
 123
 124                 wfProfileIn( __METHOD__ );
 125                 # Get variables from query string :P
 126                 $section = $wgRequest->getVal( 'section' );
 127                 $preload = $wgRequest->getVal( 'preload' );
 128                 $undoafter = $wgRequest->getVal( 'undoafter' );
 129                 $undo = $wgRequest->getVal( 'undo' );
 130
 131                 $text = '';
 132                 // For message page not locally set, use the i18n message.
 133                 // For other non-existent articles, use preload text if any.
 134                 if ( !$this->mTitle->exists() ) {
 135                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 136                                 # If this is a system message, get the default text.
 137                                 list( $message, $lang ) = $wgMessageCache->figureMessage( $wgContLang->lcfirst( $this->mTitle->getText() ) );
 138                                 $wgMessageCache->loadAllMessages( $lang );
 139                                 $text = wfMsgGetKey( $message, false, $lang, false );
 140                                 if( wfEmptyMsg( $message, $text ) )
 141                                         $text = '';
 142                         } else {
 143                                 # If requested, preload some text.
 144                                 $text = $this->getPreloadedText( $preload );
 145                         }
 146                 // For existing pages, get text based on "undo" or section parameters.
 147                 } else {
 148                         $text = $this->mArticle->getContent();
 149                         if ( $undo > 0 && $undoafter > 0 && $undo < $undoafter ) {
 150                                 # If they got undoafter and undo round the wrong way, switch them
 151                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 152                         }
 153                         if ( $undo > 0 && $undo > $undoafter ) {
 154                                 # Undoing a specific edit overrides section editing; section-editing
 155                                 # doesn't work with undoing.
 156                                 if ( $undoafter ) {
 157                                         $undorev = Revision::newFromId($undo);
 158                                         $oldrev = Revision::newFromId($undoafter);
 159                                 } else {
 160                                         $undorev = Revision::newFromId($undo);
 161                                         $oldrev = $undorev ? $undorev->getPrevious() : null;
 162                                 }
 163
 164                                 # Sanity check, make sure it's the right page,
 165                                 # the revisions exist and they were not deleted.
 166                                 # Otherwise, $text will be left as-is.
 167                                 if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 168                                         $undorev->getPage() == $oldrev->getPage() &&
 169                                         $undorev->getPage() == $this->mArticle->getID() &&
 170                                         !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 171                                         !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 172
 173                                         $undotext = $this->mArticle->getUndoText( $undorev, $oldrev );
 174                                         if ( $undotext === false ) {
 175                                                 # Warn the user that something went wrong
 176                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-failure">' . wfMsgNoTrans( 'undo-failure' ) . '</div>' );
 177                                         } else {
 178                                                 $text = $undotext;
 179                                                 # Inform the user of our success and set an automatic edit summary
 180                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="mw-undo-success">' . wfMsgNoTrans( 'undo-success' ) . '</div>' );
 181                                                 $firstrev = $oldrev->getNext();
 182                                                 # If we just undid one rev, use an autosummary
 183                                                 if ( $firstrev->mId == $undo ) {
 184                                                         $this->summary = wfMsgForContent( 'undo-summary', $undo, $undorev->getUserText() );
 185                                                         $this->undidRev = $undo;
 186                                                 }
 187                                                 $this->formtype = 'diff';
 188                                         }
 189                                 } else {
 190                                         // Failed basic sanity checks.
 191                                         // Older revisions may have been removed since the link
 192                                         // was created, or we may simply have got bogus input.
 193                                         $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-norev">' . wfMsgNoTrans( 'undo-norev' ) . '</div>' );
 194                                 }
 195                         } else if ( $section != '' ) {
 196                                 if ( $section == 'new' ) {
 197                                         $text = $this->getPreloadedText( $preload );
 198                                 } else {
 199                                         $text = $wgParser->getSection( $text, $section, $def_text );
 200                                 }
 201                         }
 202                 }
 203
 204                 wfProfileOut( __METHOD__ );
 205                 return $text;
 206         }
 207
 208         /** Use this method before edit() to preload some text into the edit box */
 209         public function setPreloadedText( $text ) {
 210                 $this->mPreloadText = $text;
 211         }
 212
 213         /**
 214          * Get the contents of a page from its title and remove includeonly tags
 215          *
 216          * @param $preload String: the title of the page.
 217          * @return string The contents of the page.
 218          */
 219         protected function getPreloadedText( $preload ) {
 220                 if ( !empty($this->mPreloadText) ) {
 221                         return $this->mPreloadText;
 222                 } elseif ( $preload === '' ) {
 223                         return '';
 224                 } else {
 225                         $preloadTitle = Title::newFromText( $preload );
 226                         if ( isset( $preloadTitle ) && $preloadTitle->userCanRead() ) {
 227                                 $rev = Revision::newFromTitle($preloadTitle);
 228                                 if ( is_object( $rev ) ) {
 229                                         $text = $rev->getText();
 230                                         // TODO FIXME: AAAAAAAAAAA, this shouldn't be implementing
 231                                         // its own mini-parser! -ævar
 232                                         $text = preg_replace( '~</?includeonly>~', '', $text );
 233                                         return $text;
 234                                 } else
 235                                         return '';
 236                         }
 237                 }
 238         }
 239
 240         /**
 241          * This is the function that extracts metadata from the article body on the first view.
 242          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
 243          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
 244          */
 245         function extractMetaDataFromArticle () {
 246                 global $wgUseMetadataEdit, $wgMetadataWhitelist, $wgContLang;
 247                 $this->mMetaData = '';
 248                 if ( !$wgUseMetadataEdit ) return;
 249                 if ( $wgMetadataWhitelist == '' ) return;
 250                 $s = '';
 251                 $t = $this->getContent();
 252
 253                 # MISSING : <nowiki> filtering
 254
 255                 # Categories and language links
 256                 $t = explode ( "\n" , $t );
 257                 $catlow = strtolower ( $wgContLang->getNsText( NS_CATEGORY ) );
 258                 $cat = $ll = array();
 259                 foreach ( $t AS $key => $x ) {
 260                         $y = trim ( strtolower ( $x ) );
 261                         while ( substr ( $y , 0 , 2 ) == '[[' ) {
 262                                 $y = explode ( ']]' , trim ( $x ) );
 263                                 $first = array_shift ( $y );
 264                                 $first = explode ( ':' , $first );
 265                                 $ns = array_shift ( $first );
 266                                 $ns = trim ( str_replace ( '[' , '' , $ns ) );
 267                                 if ( $wgContLang->getLanguageName( $ns ) || strtolower ( $ns ) == $catlow ) {
 268                                         $add = '[[' . $ns . ':' . implode ( ':' , $first ) . ']]';
 269                                         if ( strtolower ( $ns ) == $catlow ) $cat[] = $add;
 270                                         else $ll[] = $add;
 271                                         $x = implode ( ']]' , $y );
 272                                         $t[$key] = $x;
 273                                         $y = trim ( strtolower ( $x ) );
 274                                 } else {
 275                                         $x = implode ( ']]' , $y );
 276                                         $y = trim ( strtolower ( $x ) );
 277                                 }
 278                         }
 279                 }
 280                 if ( count ( $cat ) ) $s .= implode ( ' ' , $cat ) . "\n";
 281                 if ( count ( $ll ) ) $s .= implode ( ' ' , $ll ) . "\n";
 282                 $t = implode ( "\n" , $t );
 283
 284                 # Load whitelist
 285                 $sat = array () ; # stand-alone-templates; must be lowercase
 286                 $wl_title = Title::newFromText ( $wgMetadataWhitelist );
 287                 $wl_article = new Article ( $wl_title );
 288                 $wl = explode ( "\n" , $wl_article->getContent() );
 289                 foreach ( $wl AS $x ) {
 290                         $isentry = false;
 291                         $x = trim ( $x );
 292                         while ( substr ( $x , 0 , 1 ) == '*' ) {
 293                                 $isentry = true;
 294                                 $x = trim ( substr ( $x , 1 ) );
 295                         }
 296                         if ( $isentry ) {
 297                                 $sat[] = strtolower ( $x );
 298                         }
 299
 300                 }
 301
 302                 # Templates, but only some
 303                 $t = explode ( '{{' , $t );
 304                 $tl = array () ;
 305                 foreach ( $t AS $key => $x ) {
 306                         $y = explode ( '}}' , $x , 2 );
 307                         if ( count ( $y ) == 2 ) {
 308                                 $z = $y[0];
 309                                 $z = explode ( '|' , $z );
 310                                 $tn = array_shift ( $z );
 311                                 if ( in_array ( strtolower ( $tn ) , $sat ) ) {
 312                                         $tl[] = '{{' . $y[0] . '}}';
 313                                         $t[$key] = $y[1];
 314                                         $y = explode ( '}}' , $y[1] , 2 );
 315                                 }
 316                                 else $t[$key] = '{{' . $x;
 317                         }
 318                         else if ( $key != 0 ) $t[$key] = '{{' . $x;
 319                         else $t[$key] = $x;
 320                 }
 321                 if ( count ( $tl ) ) $s .= implode ( ' ' , $tl );
 322                 $t = implode ( '' , $t );
 323
 324                 $t = str_replace ( "\n\n\n" , "\n" , $t );
 325                 $this->mArticle->mContent = $t;
 326                 $this->mMetaData = $s;
 327         }
 328
 329         /*
 330          * Check if a page was deleted while the user was editing it, before submit.
 331          * Note that we rely on the logging table, which hasn't been always there,
 332          * but that doesn't matter, because this only applies to brand new
 333          * deletes.
 334          */
 335         protected function wasDeletedSinceLastEdit() {
 336                 if ( $this->deletedSinceEdit )
 337                         return true;
 338                 if ( $this->mTitle->isDeletedQuick() ) {
 339                         $this->lastDelete = $this->getLastDelete();
 340                         if ( $this->lastDelete ) {
 341                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
 342                                 if ( $deleteTime > $this->starttime ) {
 343                                         $this->deletedSinceEdit = true;
 344                                 }
 345                         }
 346                 }
 347                 return $this->deletedSinceEdit;
 348         }
 349
 350         function submit() {
 351                 $this->edit();
 352         }
 353
 354         /**
 355          * This is the function that gets called for "action=edit". It
 356          * sets up various member variables, then passes execution to
 357          * another function, usually showEditForm()
 358          *
 359          * The edit form is self-submitting, so that when things like
 360          * preview and edit conflicts occur, we get the same form back
 361          * with the extra stuff added.  Only when the final submission
 362          * is made and all is well do we actually save and redirect to
 363          * the newly-edited page.
 364          */
 365         function edit() {
 366                 global $wgOut, $wgRequest, $wgEnableJS2system;
 367                 // Allow extensions to modify/prevent this form or submission
 368                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 369                         return;
 370                 }
 371
 372                 wfProfileIn( __METHOD__ );
 373                 wfDebug( __METHOD__.": enter\n" );
 374
 375                 // This is not an article
 376                 $wgOut->setArticleFlag( false );
 377
 378                 $this->importFormData( $wgRequest );
 379                 $this->firsttime = false;
 380
 381                 if ( $this->live ) {
 382                         $this->livePreview();
 383                         wfProfileOut( __METHOD__ );
 384                         return;
 385                 }
 386
 387                 if ( wfReadOnly() && $this->save ) {
 388                         // Force preview
 389                         $this->save = false;
 390                         $this->preview = true;
 391                 }
 392
 393                 $wgOut->addScriptFile( 'edit.js' );
 394
 395                 if( $wgEnableJS2system )
 396                     $wgOut->addScriptClass( 'editPage' );
 397
 398                 $permErrors = $this->getEditPermissionErrors();
 399                 if ( $permErrors ) {
 400                         wfDebug( __METHOD__.": User can't edit\n" );
 401                         $this->readOnlyPage( $this->getContent(), true, $permErrors, 'edit' );
 402                         wfProfileOut( __METHOD__ );
 403                         return;
 404                 } else {
 405                         if ( $this->save ) {
 406                                 $this->formtype = 'save';
 407                         } else if ( $this->preview ) {
 408                                 $this->formtype = 'preview';
 409                         } else if ( $this->diff ) {
 410                                 $this->formtype = 'diff';
 411                         } else { # First time through
 412                                 $this->firsttime = true;
 413                                 if ( $this->previewOnOpen() ) {
 414                                         $this->formtype = 'preview';
 415                                 } else {
 416                                         $this->extractMetaDataFromArticle () ;
 417                                         $this->formtype = 'initial';
 418                                 }
 419                         }
 420                 }
 421
 422                 // If they used redlink=1 and the page exists, redirect to the main article
 423                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 424                         $wgOut->redirect( $this->mTitle->getFullURL() );
 425                 }
 426
 427                 wfProfileIn( __METHOD__."-business-end" );
 428
 429                 $this->isConflict = false;
 430                 // css / js subpages of user pages get a special treatment
 431                 $this->isCssJsSubpage      = $this->mTitle->isCssJsSubpage();
 432                 $this->isCssSubpage        = $this->mTitle->isCssSubpage();
 433                 $this->isJsSubpage         = $this->mTitle->isJsSubpage();
 434                 $this->isValidCssJsSubpage = $this->mTitle->isValidCssJsSubpage();
 435
 436                 # Show applicable editing introductions
 437                 if ( $this->formtype == 'initial' || $this->firsttime )
 438                         $this->showIntro();
 439
 440                 if ( $this->mTitle->isTalkPage() ) {
 441                         $wgOut->addWikiMsg( 'talkpagetext' );
 442                 }
 443
 444                 # Optional notices on a per-namespace and per-page basis
 445                 $editnotice_ns   = 'editnotice-'.$this->mTitle->getNamespace();
 446                 if ( !wfEmptyMsg( $editnotice_ns, wfMsgForContent( $editnotice_ns ) ) ) {
 447                         $wgOut->addWikiText( wfMsgForContent( $editnotice_ns )  );
 448                 }
 449                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
 450                         $parts = explode( '/', $this->mTitle->getDBkey() );
 451                         $editnotice_base = $editnotice_ns;
 452                         while ( count( $parts ) > 0 ) {
 453                                 $editnotice_base .= '-'.array_shift( $parts );
 454                                 if ( !wfEmptyMsg( $editnotice_base, wfMsgForContent( $editnotice_base ) ) ) {
 455                                         $wgOut->addWikiText( wfMsgForContent( $editnotice_base )  );
 456                                 }
 457                         }
 458                 }
 459
 460                 # Attempt submission here.  This will check for edit conflicts,
 461                 # and redundantly check for locked database, blocked IPs, etc.
 462                 # that edit() already checked just in case someone tries to sneak
 463                 # in the back door with a hand-edited submission URL.
 464
 465                 if ( 'save' == $this->formtype ) {
 466                         if ( !$this->attemptSave() ) {
 467                                 wfProfileOut( __METHOD__."-business-end" );
 468                                 wfProfileOut( __METHOD__ );
 469                                 return;
 470                         }
 471                 }
 472
 473                 # First time through: get contents, set time for conflict
 474                 # checking, etc.
 475                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 476                         if ( $this->initialiseForm() === false) {
 477                                 $this->noSuchSectionPage();
 478                                 wfProfileOut( __METHOD__."-business-end" );
 479                                 wfProfileOut( __METHOD__ );
 480                                 return;
 481                         }
 482                         if ( !$this->mTitle->getArticleId() )
 483                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 484                 }
 485
 486                 $this->showEditForm();
 487                 wfProfileOut( __METHOD__."-business-end" );
 488                 wfProfileOut( __METHOD__ );
 489         }
 490
 491         protected function getEditPermissionErrors() {
 492                 global $wgUser;
 493                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 494                 # Can this title be created?
 495                 if ( !$this->mTitle->exists() ) {
 496                         $permErrors = array_merge( $permErrors,
 497                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 498                 }
 499                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 500                 $remove = array();
 501                 foreach( $permErrors as $error ) {
 502                         if ( ($this->preview || $this->diff) &&
 503                                 ($error[0] == 'blockedtext' || $error[0] == 'autoblockedtext') )
 504                         {
 505                                 $remove[] = $error;
 506                         }
 507                 }
 508                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 509                 return $permErrors;
 510         }
 511
 512         /**
 513          * Show a read-only error
 514          * Parameters are the same as OutputPage:readOnlyPage()
 515          * Redirect to the article page if redlink=1
 516          */
 517         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 518                 global $wgRequest, $wgOut;
 519                 if ( $wgRequest->getBool( 'redlink' ) ) {
 520                         // The edit page was reached via a red link.
 521                         // Redirect to the article page and let them click the edit tab if
 522                         // they really want a permission error.
 523                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 524                 } else {
 525                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 526                 }
 527         }
 528
 529         /**
 530          * Should we show a preview when the edit form is first shown?
 531          *
 532          * @return bool
 533          */
 534         protected function previewOnOpen() {
 535                 global $wgRequest, $wgUser;
 536                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 537                         // Explicit override from request
 538                         return true;
 539                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 540                         // Explicit override from request
 541                         return false;
 542                 } elseif ( $this->section == 'new' ) {
 543                         // Nothing *to* preview for new sections
 544                         return false;
 545                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 546                         // Standard preference behaviour
 547                         return true;
 548                 } elseif ( !$this->mTitle->exists() && $this->mTitle->getNamespace() == NS_CATEGORY ) {
 549                         // Categories are special
 550                         return true;
 551                 } else {
 552                         return false;
 553                 }
 554         }
 555
 556         /**
 557          * @todo document
 558          * @param $request
 559          */
 560         function importFormData( &$request ) {
 561                 global $wgLang, $wgUser;
 562                 $fname = 'EditPage::importFormData';
 563                 wfProfileIn( $fname );
 564
 565                 # Section edit can come from either the form or a link
 566                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 567
 568                 if ( $request->wasPosted() ) {
 569                         # These fields need to be checked for encoding.
 570                         # Also remove trailing whitespace, but don't remove _initial_
 571                         # whitespace from the text boxes. This may be significant formatting.
 572                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 573                         $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
 574                         $this->mMetaData = rtrim( $request->getText( 'metadata' ) );
 575                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 576                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary' ), 250, '' );
 577
 578                         # Remove extra headings from summaries and new sections.
 579                         $this->summary = preg_replace('/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary);
 580
 581                         $this->edittime = $request->getVal( 'wpEdittime' );
 582                         $this->starttime = $request->getVal( 'wpStarttime' );
 583
 584                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 585
 586                         if ( is_null( $this->edittime ) ) {
 587                                 # If the form is incomplete, force to preview.
 588                                 wfDebug( "$fname: Form data appears to be incomplete\n" );
 589                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 590                                 $this->preview = true;
 591                         } else {
 592                                 /* Fallback for live preview */
 593                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 594                                 $this->diff = $request->getCheck( 'wpDiff' );
 595
 596                                 // Remember whether a save was requested, so we can indicate
 597                                 // if we forced preview due to session failure.
 598                                 $this->mTriedSave = !$this->preview;
 599
 600                                 if ( $this->tokenOk( $request ) ) {
 601                                         # Some browsers will not report any submit button
 602                                         # if the user hits enter in the comment box.
 603                                         # The unmarked state will be assumed to be a save,
 604                                         # if the form seems otherwise complete.
 605                                         wfDebug( "$fname: Passed token check.\n" );
 606                                 } else if ( $this->diff ) {
 607                                         # Failed token check, but only requested "Show Changes".
 608                                         wfDebug( "$fname: Failed token check; Show Changes requested.\n" );
 609                                 } else {
 610                                         # Page might be a hack attempt posted from
 611                                         # an external site. Preview instead of saving.
 612                                         wfDebug( "$fname: Failed token check; forcing preview\n" );
 613                                         $this->preview = true;
 614                                 }
 615                         }
 616                         $this->save = !$this->preview && !$this->diff;
 617                         if ( !preg_match( '/^\d{14}$/', $this->edittime )) {
 618                                 $this->edittime = null;
 619                         }
 620
 621                         if ( !preg_match( '/^\d{14}$/', $this->starttime )) {
 622                                 $this->starttime = null;
 623                         }
 624
 625                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 626
 627                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 628                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 629
 630                         # Don't force edit summaries when a user is editing their own user or talk page
 631                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 632                                 $this->mTitle->getText() == $wgUser->getName() )
 633                         {
 634                                 $this->allowBlankSummary = true;
 635                         } else {
 636                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary');
 637                         }
 638
 639                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 640                 } else {
 641                         # Not a posted form? Start with nothing.
 642                         wfDebug( "$fname: Not a posted form.\n" );
 643                         $this->textbox1  = '';
 644                         $this->textbox2  = '';
 645                         $this->mMetaData = '';
 646                         $this->summary   = '';
 647                         $this->edittime  = '';
 648                         $this->starttime = wfTimestampNow();
 649                         $this->edit      = false;
 650                         $this->preview   = false;
 651                         $this->save      = false;
 652                         $this->diff      = false;
 653                         $this->minoredit = false;
 654                         $this->watchthis = false;
 655                         $this->recreate  = false;
 656
 657                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 658                                 $this->summary = $request->getVal( 'preloadtitle' );
 659                         }
 660                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 661                                 $this->summary = $request->getText( 'summary' );
 662                         }
 663
 664                         if ( $request->getVal( 'minor' ) ) {
 665                                 $this->minoredit = true;
 666                         }
 667                 }
 668
 669                 // FIXME: unused variable?
 670                 $this->oldid = $request->getInt( 'oldid' );
 671
 672                 $this->live = $request->getCheck( 'live' );
 673                 $this->editintro = $request->getText( 'editintro' );
 674
 675                 wfProfileOut( $fname );
 676
 677                 // Allow extensions to modify form data
 678                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 679         }
 680
 681         /**
 682          * Make sure the form isn't faking a user's credentials.
 683          *
 684          * @param $request WebRequest
 685          * @return bool
 686          * @private
 687          */
 688         function tokenOk( &$request ) {
 689                 global $wgUser;
 690                 $token = $request->getVal( 'wpEditToken' );
 691                 $this->mTokenOk = $wgUser->matchEditToken( $token );
 692                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
 693                 return $this->mTokenOk;
 694         }
 695
 696         /**
 697          * Show all applicable editing introductions
 698          */
 699         protected function showIntro() {
 700                 global $wgOut, $wgUser;
 701                 if ( $this->suppressIntro ) {
 702                         return;
 703                 }
 704
 705                 $namespace = $this->mTitle->getNamespace();
 706
 707                 if ( $namespace == NS_MEDIAWIKI ) {
 708                         # Show a warning if editing an interface message
 709                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1</div>", 'editinginterface' );
 710                 }
 711
 712                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exists
 713                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
 714                         $parts = explode( '/', $this->mTitle->getText(), 2 );
 715                         $username = $parts[0];
 716                         $id = User::idFromName( $username );
 717                         $ip = User::isIP( $username );
 718                         if ( $id == 0 && !$ip ) {
 719                                 $wgOut->wrapWikiMsg( '<div class="mw-userpage-userdoesnotexist error">$1</div>',
 720                                         array( 'userpage-userdoesnotexist', $username ) );
 721                         }
 722                 }
 723                 # Try to add a custom edit intro, or use the standard one if this is not possible.
 724                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
 725                         if ( $wgUser->isLoggedIn() ) {
 726                                 $wgOut->wrapWikiMsg( '<div class="mw-newarticletext">$1</div>', 'newarticletext' );
 727                         } else {
 728                                 $wgOut->wrapWikiMsg( '<div class="mw-newarticletextanon">$1</div>', 'newarticletextanon' );
 729                         }
 730                 }
 731                 # Give a notice if the user is editing a deleted/moved page...
 732                 if ( !$this->mTitle->exists() ) {
 733                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle->getPrefixedText(),
 734                                 '', array( 'lim' => 10,
 735                                            'conds' => array( "log_action != 'revision'" ),
 736                                            'showIfEmpty' => false,
 737                                            'msgKey' => array( 'recreate-moveddeleted-warn') )
 738                         );
 739                 }
 740         }
 741
 742         /**
 743          * Attempt to show a custom editing introduction, if supplied
 744          *
 745          * @return bool
 746          */
 747         protected function showCustomIntro() {
 748                 if ( $this->editintro ) {
 749                         $title = Title::newFromText( $this->editintro );
 750                         if ( $title instanceof Title && $title->exists() && $title->userCanRead() ) {
 751                                 global $wgOut;
 752                                 $revision = Revision::newFromTitle( $title );
 753                                 $wgOut->addWikiTextTitleTidy( $revision->getText(), $this->mTitle );
 754                                 return true;
 755                         } else {
 756                                 return false;
 757                         }
 758                 } else {
 759                         return false;
 760                 }
 761         }
 762
 763         /**
 764          * Attempt submission (no UI)
 765          * @return one of the constants describing the result
 766          */
 767         function internalAttemptSave( &$result, $bot = false ) {
 768                 global $wgFilterCallback, $wgUser, $wgOut, $wgParser;
 769                 global $wgMaxArticleSize;
 770
 771                 $fname = 'EditPage::attemptSave';
 772                 wfProfileIn( $fname );
 773                 wfProfileIn( "$fname-checks" );
 774
 775                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) )
 776                 {
 777                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
 778                         return self::AS_HOOK_ERROR;
 779                 }
 780
 781                 # Check image redirect
 782                 if ( $this->mTitle->getNamespace() == NS_FILE &&
 783                         Title::newFromRedirect( $this->textbox1 ) instanceof Title &&
 784                         !$wgUser->isAllowed( 'upload' ) ) {
 785                                 if ( $wgUser->isAnon() ) {
 786                                         return self::AS_IMAGE_REDIRECT_ANON;
 787                                 } else {
 788                                         return self::AS_IMAGE_REDIRECT_LOGGED;
 789                                 }
 790                 }
 791
 792                 # Reintegrate metadata
 793                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 794                 $this->mMetaData = '' ;
 795
 796                 # Check for spam
 797                 $match = self::matchSummarySpamRegex( $this->summary );
 798                 if ( $match === false ) {
 799                         $match = self::matchSpamRegex( $this->textbox1 );
 800                 }
 801                 if ( $match !== false ) {
 802                         $result['spam'] = $match;
 803                         $ip = wfGetIP();
 804                         $pdbk = $this->mTitle->getPrefixedDBkey();
 805                         $match = str_replace( "\n", '', $match );
 806                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
 807                         wfProfileOut( "$fname-checks" );
 808                         wfProfileOut( $fname );
 809                         return self::AS_SPAM_ERROR;
 810                 }
 811                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
 812                         # Error messages or other handling should be performed by the filter function
 813                         wfProfileOut( "$fname-checks" );
 814                         wfProfileOut( $fname );
 815                         return self::AS_FILTERING;
 816                 }
 817                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
 818                         # Error messages etc. could be handled within the hook...
 819                         wfProfileOut( "$fname-checks" );
 820                         wfProfileOut( $fname );
 821                         return self::AS_HOOK_ERROR;
 822                 } elseif ( $this->hookError != '' ) {
 823                         # ...or the hook could be expecting us to produce an error
 824                         wfProfileOut( "$fname-checks" );
 825                         wfProfileOut( $fname );
 826                         return self::AS_HOOK_ERROR_EXPECTED;
 827                 }
 828                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 829                         # Check block state against master, thus 'false'.
 830                         wfProfileOut( "$fname-checks" );
 831                         wfProfileOut( $fname );
 832                         return self::AS_BLOCKED_PAGE_FOR_USER;
 833                 }
 834                 $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
 835                 if ( $this->kblength > $wgMaxArticleSize ) {
 836                         // Error will be displayed by showEditForm()
 837                         $this->tooBig = true;
 838                         wfProfileOut( "$fname-checks" );
 839                         wfProfileOut( $fname );
 840                         return self::AS_CONTENT_TOO_BIG;
 841                 }
 842
 843                 if ( !$wgUser->isAllowed('edit') ) {
 844                         if ( $wgUser->isAnon() ) {
 845                                 wfProfileOut( "$fname-checks" );
 846                                 wfProfileOut( $fname );
 847                                 return self::AS_READ_ONLY_PAGE_ANON;
 848                         }
 849                         else {
 850                                 wfProfileOut( "$fname-checks" );
 851                                 wfProfileOut( $fname );
 852                                 return self::AS_READ_ONLY_PAGE_LOGGED;
 853                         }
 854                 }
 855
 856                 if ( wfReadOnly() ) {
 857                         wfProfileOut( "$fname-checks" );
 858                         wfProfileOut( $fname );
 859                         return self::AS_READ_ONLY_PAGE;
 860                 }
 861                 if ( $wgUser->pingLimiter() ) {
 862                         wfProfileOut( "$fname-checks" );
 863                         wfProfileOut( $fname );
 864                         return self::AS_RATE_LIMITED;
 865                 }
 866
 867                 # If the article has been deleted while editing, don't save it without
 868                 # confirmation
 869                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
 870                         wfProfileOut( "$fname-checks" );
 871                         wfProfileOut( $fname );
 872                         return self::AS_ARTICLE_WAS_DELETED;
 873                 }
 874
 875                 wfProfileOut( "$fname-checks" );
 876
 877                 # If article is new, insert it.
 878                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 879                 if ( 0 == $aid ) {
 880                         // Late check for create permission, just in case *PARANOIA*
 881                         if ( !$this->mTitle->userCan( 'create' ) ) {
 882                                 wfDebug( "$fname: no create permission\n" );
 883                                 wfProfileOut( $fname );
 884                                 return self::AS_NO_CREATE_PERMISSION;
 885                         }
 886
 887                         # Don't save a new article if it's blank.
 888                         if ( '' == $this->textbox1 ) {
 889                                 wfProfileOut( $fname );
 890                                 return self::AS_BLANK_ARTICLE;
 891                         }
 892
 893                         // Run post-section-merge edit filter
 894                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
 895                                 # Error messages etc. could be handled within the hook...
 896                                 wfProfileOut( $fname );
 897                                 return self::AS_HOOK_ERROR;
 898                         } elseif ( $this->hookError != '' ) {
 899                                 # ...or the hook could be expecting us to produce an error
 900                                 wfProfileOut( $fname );
 901                                 return self::AS_HOOK_ERROR_EXPECTED;
 902                         }
 903
 904                         # Handle the user preference to force summaries here. Check if it's not a redirect.
 905                         if ( !$this->allowBlankSummary && !Title::newFromRedirect( $this->textbox1 ) ) {
 906                                 if ( md5( $this->summary ) == $this->autoSumm ) {
 907                                         $this->missingSummary = true;
 908                                         wfProfileOut( $fname );
 909                                         return self::AS_SUMMARY_NEEDED;
 910                                 }
 911                         }
 912
 913                         $isComment = ( $this->section == 'new' );
 914
 915                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 916                                 $this->minoredit, $this->watchthis, false, $isComment, $bot );
 917
 918                         wfProfileOut( $fname );
 919                         return self::AS_SUCCESS_NEW_ARTICLE;
 920                 }
 921
 922                 # Article exists. Check for edit conflict.
 923
 924                 $this->mArticle->clear(); # Force reload of dates, etc.
 925                 $this->mArticle->forUpdate( true ); # Lock the article
 926
 927                 wfDebug("timestamp: {$this->mArticle->getTimestamp()}, edittime: {$this->edittime}\n");
 928
 929                 if ( $this->mArticle->getTimestamp() != $this->edittime ) {
 930                         $this->isConflict = true;
 931                         if ( $this->section == 'new' ) {
 932                                 if ( $this->mArticle->getUserText() == $wgUser->getName() &&
 933                                         $this->mArticle->getComment() == $this->summary ) {
 934                                         // Probably a duplicate submission of a new comment.
 935                                         // This can happen when squid resends a request after
 936                                         // a timeout but the first one actually went through.
 937                                         wfDebug( "EditPage::editForm duplicate new section submission; trigger edit conflict!\n" );
 938                                 } else {
 939                                         // New comment; suppress conflict.
 940                                         $this->isConflict = false;
 941                                         wfDebug( "EditPage::editForm conflict suppressed; new section\n" );
 942                                 }
 943                         }
 944                 }
 945                 $userid = $wgUser->getId();
 946
 947                 # Suppress edit conflict with self, except for section edits where merging is required.
 948                 if ( $this->isConflict && $this->section == '' && $this->userWasLastToEdit($userid,$this->edittime) ) {
 949                         wfDebug( "EditPage::editForm Suppressing edit conflict, same user.\n" );
 950                         $this->isConflict = false;
 951                 }
 952
 953                 if ( $this->isConflict ) {
 954                         wfDebug( "EditPage::editForm conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 955                                 $this->mArticle->getTimestamp() . "')\n" );
 956                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime );
 957                 } else {
 958                         wfDebug( "EditPage::editForm getting section '$this->section'\n" );
 959                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary );
 960                 }
 961                 if ( is_null( $text ) ) {
 962                         wfDebug( "EditPage::editForm activating conflict; section replace failed.\n" );
 963                         $this->isConflict = true;
 964                         $text = $this->textbox1; // do not try to merge here!
 965                 } else if ( $this->isConflict ) {
 966                         # Attempt merge
 967                         if ( $this->mergeChangesInto( $text ) ) {
 968                                 // Successful merge! Maybe we should tell the user the good news?
 969                                 $this->isConflict = false;
 970                                 wfDebug( "EditPage::editForm Suppressing edit conflict, successful merge.\n" );
 971                         } else {
 972                                 $this->section = '';
 973                                 $this->textbox1 = $text;
 974                                 wfDebug( "EditPage::editForm Keeping edit conflict, failed merge.\n" );
 975                         }
 976                 }
 977
 978                 if ( $this->isConflict ) {
 979                         wfProfileOut( $fname );
 980                         return self::AS_CONFLICT_DETECTED;
 981                 }
 982
 983                 $oldtext = $this->mArticle->getContent();
 984
 985                 // Run post-section-merge edit filter
 986                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$this->hookError, $this->summary ) ) ) {
 987                         # Error messages etc. could be handled within the hook...
 988                         wfProfileOut( $fname );
 989                         return self::AS_HOOK_ERROR;
 990                 } elseif ( $this->hookError != '' ) {
 991                         # ...or the hook could be expecting us to produce an error
 992                         wfProfileOut( $fname );
 993                         return self::AS_HOOK_ERROR_EXPECTED;
 994                 }
 995
 996                 # Handle the user preference to force summaries here, but not for null edits
 997                 if ( $this->section != 'new' && !$this->allowBlankSummary && 0 != strcmp($oldtext,$text)
 998                         && !Title::newFromRedirect( $text ) ) # check if it's not a redirect
 999                 {
1000                         if ( md5( $this->summary ) == $this->autoSumm ) {
1001                                 $this->missingSummary = true;
1002                                 wfProfileOut( $fname );
1003                                 return self::AS_SUMMARY_NEEDED;
1004                         }
1005                 }
1006
1007                 # And a similar thing for new sections
1008                 if ( $this->section == 'new' && !$this->allowBlankSummary ) {
1009                         if (trim($this->summary) == '') {
1010                                 $this->missingSummary = true;
1011                                 wfProfileOut( $fname );
1012                                 return self::AS_SUMMARY_NEEDED;
1013                         }
1014                 }
1015
1016                 # All's well
1017                 wfProfileIn( "$fname-sectionanchor" );
1018                 $sectionanchor = '';
1019                 if ( $this->section == 'new' ) {
1020                         if ( $this->textbox1 == '' ) {
1021                                 $this->missingComment = true;
1022                                 return self::AS_TEXTBOX_EMPTY;
1023                         }
1024                         if ( $this->summary != '' ) {
1025                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $this->summary );
1026                                 # This is a new section, so create a link to the new section
1027                                 # in the revision summary.
1028                                 $cleanSummary = $wgParser->stripSectionName( $this->summary );
1029                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1030                         }
1031                 } elseif ( $this->section != '' ) {
1032                         # Try to get a section anchor from the section source, redirect to edited section if header found
1033                         # XXX: might be better to integrate this into Article::replaceSection
1034                         # for duplicate heading checking and maybe parsing
1035                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1036                         # we can't deal with anchors, includes, html etc in the header for now,
1037                         # headline would need to be parsed to improve this
1038                         if ( $hasmatch and strlen($matches[2]) > 0 ) {
1039                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $matches[2] );
1040                         }
1041                 }
1042                 wfProfileOut( "$fname-sectionanchor" );
1043
1044                 // Save errors may fall down to the edit form, but we've now
1045                 // merged the section into full text. Clear the section field
1046                 // so that later submission of conflict forms won't try to
1047                 // replace that into a duplicated mess.
1048                 $this->textbox1 = $text;
1049                 $this->section = '';
1050
1051                 // Check for length errors again now that the section is merged in
1052                 $this->kblength = (int)(strlen( $text ) / 1024);
1053                 if ( $this->kblength > $wgMaxArticleSize ) {
1054                         $this->tooBig = true;
1055                         wfProfileOut( $fname );
1056                         return self::AS_MAX_ARTICLE_SIZE_EXCEEDED;
1057                 }
1058
1059                 # update the article here
1060                 if ( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
1061                         $this->watchthis, $bot, $sectionanchor ) )
1062                 {
1063                         wfProfileOut( $fname );
1064                         return self::AS_SUCCESS_UPDATE;
1065                 } else {
1066                         $this->isConflict = true;
1067                 }
1068                 wfProfileOut( $fname );
1069                 return self::AS_END;
1070         }
1071
1072         /**
1073          * Check if no edits were made by other users since
1074          * the time a user started editing the page. Limit to
1075          * 50 revisions for the sake of performance.
1076          */
1077         protected function userWasLastToEdit( $id, $edittime ) {
1078                 if( !$id ) return false;
1079                 $dbw = wfGetDB( DB_MASTER );
1080                 $res = $dbw->select( 'revision',
1081                         'rev_user',
1082                         array(
1083                                 'rev_page' => $this->mArticle->getId(),
1084                                 'rev_timestamp > '.$dbw->addQuotes( $dbw->timestamp($edittime) )
1085                         ),
1086                         __METHOD__,
1087                         array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
1088                 while( $row = $res->fetchObject() ) {
1089                         if( $row->rev_user != $id ) {
1090                                 return false;
1091                         }
1092                 }
1093                 return true;
1094         }
1095
1096         /**
1097          * Check given input text against $wgSpamRegex, and return the text of the first match.
1098          * @return mixed -- matching string or false
1099          */
1100         public static function matchSpamRegex( $text ) {
1101                 global $wgSpamRegex;
1102                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1103                 $regexes = (array)$wgSpamRegex;
1104                 return self::matchSpamRegexInternal( $text, $regexes );
1105         }
1106
1107         /**
1108          * Check given input text against $wgSpamRegex, and return the text of the first match.
1109          * @return mixed -- matching string or false
1110          */
1111         public static function matchSummarySpamRegex( $text ) {
1112                 global $wgSummarySpamRegex;
1113                 $regexes = (array)$wgSummarySpamRegex;
1114                 return self::matchSpamRegexInternal( $text, $regexes );
1115         }
1116
1117         protected static function matchSpamRegexInternal( $text, $regexes ) {
1118                 foreach( $regexes as $regex ) {
1119                         $matches = array();
1120                         if( preg_match( $regex, $text, $matches ) ) {
1121                                 return $matches[0];
1122                         }
1123                 }
1124                 return false;
1125         }
1126
1127         /**
1128          * Initialise form fields in the object
1129          * Called on the first invocation, e.g. when a user clicks an edit link
1130          */
1131         function initialiseForm() {
1132                 $this->edittime = $this->mArticle->getTimestamp();
1133                 $this->textbox1 = $this->getContent( false );
1134                 if ( $this->textbox1 === false ) return false;
1135                 wfProxyCheck();
1136                 return true;
1137         }
1138
1139         function setHeaders() {
1140                 global $wgOut, $wgTitle;
1141                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1142                 if ( $this->formtype == 'preview' ) {
1143                         $wgOut->setPageTitleActionText( wfMsg( 'preview' ) );
1144                 }
1145                 if ( $this->isConflict ) {
1146                         $wgOut->setPageTitle( wfMsg( 'editconflict', $wgTitle->getPrefixedText() ) );
1147                 } elseif ( $this->section != '' ) {
1148                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1149                         $wgOut->setPageTitle( wfMsg( $msg, $wgTitle->getPrefixedText() ) );
1150                 } else {
1151                         # Use the title defined by DISPLAYTITLE magic word when present
1152                         if ( isset($this->mParserOutput)
1153                          && ( $dt = $this->mParserOutput->getDisplayTitle() ) !== false ) {
1154                                 $title = $dt;
1155                         } else {
1156                                 $title = $wgTitle->getPrefixedText();
1157                         }
1158                         $wgOut->setPageTitle( wfMsg( 'editing', $title ) );
1159                 }
1160         }
1161
1162         /**
1163          * Send the edit form and related headers to $wgOut
1164          * @param $formCallback Optional callable that takes an OutputPage
1165          *                      parameter; will be called during form output
1166          *                      near the top, for captchas and the like.
1167          */
1168         function showEditForm( $formCallback=null ) {
1169                 global $wgOut, $wgUser, $wgLang, $wgContLang, $wgMaxArticleSize, $wgTitle, $wgRequest;
1170
1171                 # If $wgTitle is null, that means we're in API mode.
1172                 # Some hook probably called this function  without checking
1173                 # for is_null($wgTitle) first. Bail out right here so we don't
1174                 # do lots of work just to discard it right after.
1175                 if (is_null($wgTitle))
1176                         return;
1177
1178                 $fname = 'EditPage::showEditForm';
1179                 wfProfileIn( $fname );
1180
1181                 $sk = $wgUser->getSkin();
1182
1183                 #need to parse the preview early so that we know which templates are used,
1184                 #otherwise users with "show preview after edit box" will get a blank list
1185                 #we parse this near the beginning so that setHeaders can do the title
1186                 #setting work instead of leaving it in getPreviewText
1187                 $previewOutput = '';
1188                 if ( $this->formtype == 'preview' ) {
1189                         $previewOutput = $this->getPreviewText();
1190                 }
1191
1192                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) ) ;
1193
1194                 $this->setHeaders();
1195
1196                 # Enabled article-related sidebar, toplinks, etc.
1197                 $wgOut->setArticleRelated( true );
1198
1199                 if ( $this->isConflict ) {
1200                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1</div>", 'explainconflict' );
1201
1202                         $this->textbox2 = $this->textbox1;
1203                         $this->textbox1 = $this->getContent();
1204                         $this->edittime = $this->mArticle->getTimestamp();
1205                 } else {
1206                         if ( $this->section != '' && $this->section != 'new' ) {
1207                                 $matches = array();
1208                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
1209                                         preg_match( "/^(=+)(.+)\\1/mi", $this->textbox1, $matches );
1210                                         if ( !empty( $matches[2] ) ) {
1211                                                 global $wgParser;
1212                                                 $this->summary = "/* " .
1213                                                         $wgParser->stripSectionName(trim($matches[2])) .
1214                                                         " */ ";
1215                                         }
1216                                 }
1217                         }
1218
1219                         if ( $this->missingComment ) {
1220                                 $wgOut->wrapWikiMsg( '<div id="mw-missingcommenttext">$1</div>', 'missingcommenttext' );
1221                         }
1222
1223                         if ( $this->missingSummary && $this->section != 'new' ) {
1224                                 $wgOut->wrapWikiMsg( '<div id="mw-missingsummary">$1</div>', 'missingsummary' );
1225                         }
1226
1227                         if ( $this->missingSummary && $this->section == 'new' ) {
1228                                 $wgOut->wrapWikiMsg( '<div id="mw-missingcommentheader">$1</div>', 'missingcommentheader' );
1229                         }
1230
1231                         if ( $this->hookError !== '' ) {
1232                                 $wgOut->addWikiText( $this->hookError );
1233                         }
1234
1235                         if ( !$this->checkUnicodeCompliantBrowser() ) {
1236                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
1237                         }
1238                         if ( isset( $this->mArticle ) && isset( $this->mArticle->mRevision ) ) {
1239                         // Let sysop know that this will make private content public if saved
1240
1241                                 if ( !$this->mArticle->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1242                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n", 'rev-deleted-text-permission' );
1243                                 } else if ( $this->mArticle->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1244                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n", 'rev-deleted-text-view' );
1245                                 }
1246
1247                                 if ( !$this->mArticle->mRevision->isCurrent() ) {
1248                                         $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
1249                                         $wgOut->addWikiMsg( 'editingold' );
1250                                 }
1251                         }
1252                 }
1253
1254                 if ( wfReadOnly() ) {
1255                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
1256                 } elseif ( $wgUser->isAnon() && $this->formtype != 'preview' ) {
1257                         $wgOut->wrapWikiMsg( '<div id="mw-anon-edit-warning">$1</div>', 'anoneditwarning' );
1258                 } else {
1259                         if ( $this->isCssJsSubpage ) {
1260                                 # Check the skin exists
1261                                 if ( !$this->isValidCssJsSubpage ) {
1262                                         $wgOut->addWikiMsg( 'userinvalidcssjstitle', $wgTitle->getSkinFromCssJsSubpage() );
1263                                 }
1264                                 if ( $this->formtype !== 'preview' ) {
1265                                         if ( $this->isCssSubpage )
1266                                                 $wgOut->addWikiMsg( 'usercssyoucanpreview' );
1267                                         if ( $this->isJsSubpage )
1268                                                 $wgOut->addWikiMsg( 'userjsyoucanpreview' );
1269                                 }
1270                         }
1271                 }
1272
1273                 $classes = array(); // Textarea CSS
1274                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1275                 } elseif ( $this->mTitle->isProtected( 'edit' ) ) {
1276                         # Is the title semi-protected?
1277                         if ( $this->mTitle->isSemiProtected() ) {
1278                                 $noticeMsg = 'semiprotectedpagewarning';
1279                                 $classes[] = 'mw-textarea-sprotected';
1280                         } else {
1281                                 # Then it must be protected based on static groups (regular)
1282                                 $noticeMsg = 'protectedpagewarning';
1283                                 $classes[] = 'mw-textarea-protected';
1284                         }
1285                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle->getPrefixedText(), '',
1286                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
1287                 }
1288                 if ( $this->mTitle->isCascadeProtected() ) {
1289                         # Is this page under cascading protection from some source pages?
1290                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
1291                         $notice = "<div class='mw-cascadeprotectedwarning'>$1\n";
1292                         $cascadeSourcesCount = count( $cascadeSources );
1293                         if ( $cascadeSourcesCount > 0 ) {
1294                                 # Explain, and list the titles responsible
1295                                 foreach( $cascadeSources as $page ) {
1296                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
1297                                 }
1298                         }
1299                         $notice .= '</div>';
1300                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
1301                 }
1302                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
1303                         $wgOut->wrapWikiMsg( '<div class="mw-titleprotectedwarning">$1</div>', 'titleprotectedwarning' );
1304                 }
1305
1306                 if ( $this->kblength === false ) {
1307                         $this->kblength = (int)(strlen( $this->textbox1 ) / 1024);
1308                 }
1309                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
1310                         $wgOut->addHTML( "<div class='error' id='mw-edit-longpageerror'>\n" );
1311                         $wgOut->addWikiMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) );
1312                         $wgOut->addHTML( "</div>\n" );
1313                 } elseif ( $this->kblength > 29 ) {
1314                         $wgOut->addHTML( "<div id='mw-edit-longpagewarning'>\n" );
1315                         $wgOut->addWikiMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) );
1316                         $wgOut->addHTML( "</div>\n" );
1317                 }
1318
1319                 $action = $wgTitle->escapeLocalURL( array( 'action' => $this->action ) );
1320
1321                 $summary = wfMsgExt( 'summary', 'parseinline' );
1322                 $subject = wfMsgExt( 'subject', 'parseinline' );
1323
1324                 $cancel = $sk->link(
1325                         $wgTitle,
1326                         wfMsgExt( 'cancel', array( 'parseinline' ) ),
1327                         array( 'id' => 'mw-editform-cancel' ),
1328                         array(),
1329                         array( 'known', 'noclasses' )
1330                 );
1331                 $separator = wfMsgExt( 'pipe-separator' , 'escapenoentities' );
1332                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ));
1333                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
1334                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
1335                         htmlspecialchars( wfMsg( 'newwindow' ) );
1336
1337                 global $wgRightsText;
1338                 if ( $wgRightsText ) {
1339                         $copywarnMsg = array( 'copyrightwarning',
1340                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
1341                                 $wgRightsText );
1342                 } else {
1343                         $copywarnMsg = array( 'copyrightwarning2',
1344                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
1345                 }
1346                 // Allow for site and per-namespace customization of contribution/copyright notice.
1347                 wfRunHooks( 'EditPageCopyrightWarning', array( $this->mTitle, &$copywarnMsg ) );
1348
1349                 if ( $wgUser->getOption('showtoolbar') and !$this->isCssJsSubpage ) {
1350                         # prepare toolbar for edit buttons
1351                         $toolbar = EditPage::getEditToolbar();
1352                 } else {
1353                         $toolbar = '';
1354                 }
1355
1356
1357                 // activate checkboxes if user wants them to be always active
1358                 if ( !$this->preview && !$this->diff ) {
1359                         # Sort out the "watch" checkbox
1360                         if ( $wgUser->getOption( 'watchdefault' ) ) {
1361                                 # Watch all edits
1362                                 $this->watchthis = true;
1363                         } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1364                                 # Watch creations
1365                                 $this->watchthis = true;
1366                         } elseif ( $this->mTitle->userIsWatching() ) {
1367                                 # Already watched
1368                                 $this->watchthis = true;
1369                         }
1370
1371                         # May be overriden by request parameters
1372                         if( $wgRequest->getBool( 'watchthis' ) ) {
1373                                 $this->watchthis = true;
1374                         }
1375
1376                         if ( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
1377                 }
1378
1379                 $wgOut->addHTML( $this->editFormPageTop );
1380
1381                 if ( $wgUser->getOption( 'previewontop' ) ) {
1382                         $this->displayPreviewArea( $previewOutput, true );
1383                 }
1384
1385
1386                 $wgOut->addHTML( $this->editFormTextTop );
1387
1388                 # if this is a comment, show a subject line at the top, which is also the edit summary.
1389                 # Otherwise, show a summary field at the bottom
1390                 $summarytext = $wgContLang->recodeForEdit( $this->summary );
1391
1392                 # If a blank edit summary was previously provided, and the appropriate
1393                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1394                 # user being bounced back more than once in the event that a summary
1395                 # is not required.
1396                 #####
1397                 # For a bit more sophisticated detection of blank summaries, hash the
1398                 # automatic one and pass that in the hidden field wpAutoSummary.
1399                 $summaryhiddens =  '';
1400                 if ( $this->missingSummary ) $summaryhiddens .= Xml::hidden( 'wpIgnoreBlankSummary', true );
1401                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1402                 $summaryhiddens .= Xml::hidden( 'wpAutoSummary', $autosumm );
1403                 if ( $this->section == 'new' ) {
1404                         $commentsubject = '';
1405                         if ( !$wgRequest->getBool( 'nosummary' ) ) {
1406                                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
1407                                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
1408
1409                                 $commentsubject =
1410                                         Xml::tags( 'label', array( 'for' => 'wpSummary' ), $subject );
1411                                 $commentsubject =
1412                                         Xml::tags( 'span', array( 'class' => $summaryClass, 'id' => "wpSummaryLabel" ),
1413                                                 $commentsubject );
1414                                 $commentsubject .= '&nbsp;';
1415                                 $commentsubject .= Xml::input( 'wpSummary',
1416                                                                         60,
1417                                                                         $summarytext,
1418                                                                         array(
1419                                                                                 'id' => 'wpSummary',
1420                                                                                 'maxlength' => '200',
1421                                                                                 'tabindex' => '1'
1422                                                                         ) );
1423                         } else {
1424                                 $summaryhiddens .= Xml::hidden( 'wpIgnoreBlankSummary', true ); # bug 18699
1425                         }
1426                         $editsummary = "<div class='editOptions'>\n";
1427                         global $wgParser;
1428                         $formattedSummary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $this->summary ) );
1429                         $subjectpreview = $summarytext && ( $this->preview || $this->diff ) ?
1430                                 "<div class=\"mw-summary-preview\">". wfMsgExt('subject-preview', 'parseinline') . $sk->commentBlock( $formattedSummary, $this->mTitle, true )."</div>\n" : '';
1431                         $summarypreview = '';
1432                 } else {
1433                         $commentsubject = '';
1434
1435                         # Add a class if 'missingsummary' is triggered to allow styling of the summary line
1436                         $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
1437
1438                         $editsummary = Xml::tags( 'label', array( 'for' => 'wpSummary' ), $summary );
1439                         $editsummary = Xml::tags( 'span',  array( 'class' => $summaryClass, 'id' => "wpSummaryLabel" ),
1440                                         $editsummary ) . ' ';
1441
1442                         $editsummary .= Xml::input( 'wpSummary',
1443                                 60,
1444                                 $summarytext,
1445                                 array(
1446                                         'id' => 'wpSummary',
1447                                         'maxlength' => '200',
1448                                         'tabindex' => '1'
1449                                 ) );
1450
1451                         // No idea where this is closed.
1452                         $editsummary = Xml::openElement( 'div', array( 'class' => 'editOptions' ) )
1453                                                         . $editsummary . '<br/>';
1454
1455                         $summarypreview = '';
1456                         if ( $summarytext && ( $this->preview || $this->diff ) ) {
1457                                 $summarypreview =
1458                                         Xml::tags( 'div',
1459                                                 array( 'class' => 'mw-summary-preview' ),
1460                                                 wfMsgExt( 'summary-preview', 'parseinline' ) .
1461                                                         $sk->commentBlock( $this->summary, $this->mTitle )
1462                                         );
1463                         }
1464                         $subjectpreview = '';
1465                 }
1466                 $commentsubject .= $summaryhiddens;
1467
1468                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
1469                 if ( !$this->preview && !$this->diff ) {
1470                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
1471                 }
1472                 $templates = $this->getTemplates();
1473                 $formattedtemplates = $sk->formatTemplates( $templates, $this->preview, $this->section != '');
1474
1475                 $hiddencats = $this->mArticle->getHiddenCategories();
1476                 $formattedhiddencats = $sk->formatHiddenCategories( $hiddencats );
1477
1478                 global $wgUseMetadataEdit ;
1479                 if ( $wgUseMetadataEdit ) {
1480                         $metadata = $this->mMetaData ;
1481                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
1482                         $top = wfMsgWikiHtml( 'metadata_help' );
1483                         /* ToDo: Replace with clean code */
1484                         $ew = $wgUser->getOption( 'editwidth' );
1485                         if ( $ew ) $ew = " style=\"width:100%\"";
1486                         else $ew = '';
1487                         $cols = $wgUser->getIntOption( 'cols' );
1488                         /* /ToDo */
1489                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
1490                 }
1491                 else $metadata = "" ;
1492
1493                 $recreate = '';
1494                 if ( $this->wasDeletedSinceLastEdit() ) {
1495                         if ( 'save' != $this->formtype ) {
1496                                 $wgOut->wrapWikiMsg(
1497                                         "<div class='error mw-deleted-while-editing'>\n$1</div>",
1498                                         'deletedwhileediting' );
1499                         } else {
1500                                 // Hide the toolbar and edit area, user can click preview to get it back
1501                                 // Add an confirmation checkbox and explanation.
1502                                 $toolbar = '';
1503                                 $recreate = '<div class="mw-confirm-recreate">' .
1504                                                 $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ) ) .
1505                                                 Xml::checkLabel( wfMsg( 'recreate' ), 'wpRecreate', 'wpRecreate', false,
1506                                                         array( 'title' => $sk->titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
1507                                                 ) . '</div>';
1508                         }
1509                 }
1510
1511                 $tabindex = 2;
1512
1513                 $checkboxes = $this->getCheckboxes( $tabindex, $sk,
1514                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
1515
1516                 $checkboxhtml = implode( $checkboxes, "\n" );
1517
1518                 $buttons = $this->getEditButtons( $tabindex );
1519                 $buttonshtml = implode( $buttons, "\n" );
1520
1521                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
1522                         ? '' : Xml::hidden( 'safemode', '1' );
1523
1524                 $wgOut->addHTML( <<<END
1525 {$toolbar}
1526 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1527 END
1528 );
1529
1530                 if ( is_callable( $formCallback ) ) {
1531                         call_user_func_array( $formCallback, array( &$wgOut ) );
1532                 }
1533
1534                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1535
1536                 // Put these up at the top to ensure they aren't lost on early form submission
1537                 $this->showFormBeforeText();
1538
1539                 $wgOut->addHTML( <<<END
1540 {$recreate}
1541 {$commentsubject}
1542 {$subjectpreview}
1543 {$this->editFormTextBeforeContent}
1544 END
1545 );
1546                 $this->showTextbox1( $classes );
1547
1548                 $wgOut->wrapWikiMsg( "<div id=\"editpage-copywarn\">\n$1\n</div>", $copywarnMsg );
1549                 $wgOut->addHTML( <<<END
1550 {$this->editFormTextAfterWarn}
1551 {$metadata}
1552 {$editsummary}
1553 {$summarypreview}
1554 {$checkboxhtml}
1555 {$safemodehtml}
1556 END
1557 );
1558
1559                 $wgOut->addHTML(
1560 "<div class='editButtons'>
1561 {$buttonshtml}
1562         <span class='editHelp'>{$cancel}{$separator}{$edithelp}</span>
1563 </div><!-- editButtons -->
1564 </div><!-- editOptions -->");
1565
1566                 /**
1567                  * To make it harder for someone to slip a user a page
1568                  * which submits an edit form to the wiki without their
1569                  * knowledge, a random token is associated with the login
1570                  * session. If it's not passed back with the submission,
1571                  * we won't save the page, or render user JavaScript and
1572                  * CSS previews.
1573                  *
1574                  * For anon editors, who may not have a session, we just
1575                  * include the constant suffix to prevent editing from
1576                  * broken text-mangling proxies.
1577                  */
1578                 $token = htmlspecialchars( $wgUser->editToken() );
1579                 $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
1580
1581                 $this->showTosSummary();
1582                 $this->showEditTools();
1583
1584                 $wgOut->addHTML( <<<END
1585 {$this->editFormTextAfterTools}
1586 <div class='templatesUsed'>
1587 {$formattedtemplates}
1588 </div>
1589 <div class='hiddencats'>
1590 {$formattedhiddencats}
1591 </div>
1592 END
1593 );
1594
1595                 if (!$this->preview) {
1596                         $wgOut->addHTML( Xml::tags( 'div',
1597                                                                                 array( 'class' => 'catlinks catlinks-allhidden',
1598                                                                                                 'id' => 'catlinks' ), ' ' ) );
1599                 }
1600
1601                 if ( $this->isConflict && wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
1602                         $wgOut->wrapWikiMsg( '==$1==', "yourdiff" );
1603
1604                         $de = new DifferenceEngine( $this->mTitle );
1605                         $de->setText( $this->textbox2, $this->textbox1 );
1606                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1607
1608                         $wgOut->wrapWikiMsg( '==$1==', "yourtext" );
1609                         $this->showTextbox2();
1610                 }
1611                 $wgOut->addHTML( $this->editFormTextBottom );
1612                 $wgOut->addHTML( "</form>\n" );
1613                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1614                         $this->displayPreviewArea( $previewOutput, false );
1615                 }
1616
1617                 wfProfileOut( $fname );
1618         }
1619
1620         protected function showFormBeforeText() {
1621                 global $wgOut;
1622                 $wgOut->addHTML( "
1623 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
1624 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
1625 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
1626 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
1627         }
1628
1629         protected function showTextbox1( $classes ) {
1630                 $attribs = array( 'tabindex' => 1 );
1631
1632                 if ( $this->wasDeletedSinceLastEdit() )
1633                         $attribs['type'] = 'hidden';
1634                 if ( !empty($classes) )
1635                         $attribs['class'] = implode(' ',$classes);
1636
1637                 $this->showTextbox( $this->textbox1, 'wpTextbox1', $attribs );
1638         }
1639
1640         protected function showTextbox2() {
1641                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6 ) );
1642         }
1643
1644         protected function showTextbox( $content, $name, $attribs = array() ) {
1645                 global $wgOut, $wgUser;
1646
1647                 $wikitext = $this->safeUnicodeOutput( $content );
1648                 if ( $wikitext !== '' ) {
1649                         // Ensure there's a newline at the end, otherwise adding lines
1650                         // is awkward.
1651                         // But don't add a newline if the ext is empty, or Firefox in XHTML
1652                         // mode will show an extra newline. A bit annoying.
1653                         $wikitext .= "\n";
1654                 }
1655
1656                 $attribs['accesskey'] = ',';
1657                 $attribs['id'] = $name;
1658
1659                 if ( $wgUser->getOption( 'editwidth' ) )
1660                         $attribs['style'] = 'width: 100%';
1661
1662                 $wgOut->addHTML( Xml::textarea(
1663                         $name,
1664                         $wikitext,
1665                         $wgUser->getIntOption( 'cols' ), $wgUser->getIntOption( 'rows' ),
1666                         $attribs ) );
1667         }
1668
1669         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
1670                 global $wgOut;
1671                 $classes = array();
1672                 if ( $isOnTop )
1673                         $classes[] = 'ontop';
1674
1675                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
1676
1677                 if ( $this->formtype != 'preview' )
1678                         $attribs['style'] = 'display: none;';
1679
1680                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
1681
1682                 if ( $this->formtype == 'preview' ) {
1683                         $this->showPreview( $previewOutput );
1684                 }
1685
1686                 $wgOut->addHTML( '</div>' );
1687
1688                 if ( $this->formtype == 'diff') {
1689                         $this->showDiff();
1690                 }
1691         }
1692
1693         /**
1694          * Append preview output to $wgOut.
1695          * Includes category rendering if this is a category page.
1696          *
1697          * @param string $text The HTML to be output for the preview.
1698          */
1699         protected function showPreview( $text ) {
1700                 global $wgOut;
1701                 if ( $this->mTitle->getNamespace() == NS_CATEGORY) {
1702                         $this->mArticle->openShowCategory();
1703                 }
1704                 # This hook seems slightly odd here, but makes things more
1705                 # consistent for extensions.
1706                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
1707                 $wgOut->addHTML( $text );
1708                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
1709                         $this->mArticle->closeShowCategory();
1710                 }
1711         }
1712
1713         /**
1714          * Live Preview lets us fetch rendered preview page content and
1715          * add it to the page without refreshing the whole page.
1716          * If not supported by the browser it will fall through to the normal form
1717          * submission method.
1718          *
1719          * This function outputs a script tag to support live preview, and
1720          * returns an onclick handler which should be added to the attributes
1721          * of the preview button
1722          */
1723         function doLivePreviewScript() {
1724                 global $wgOut, $wgTitle;
1725                 $wgOut->addScriptFile( 'preview.js' );
1726                 return "";
1727         }
1728
1729         protected function showTosSummary() {
1730                 $msg = 'editpage-tos-summary';
1731                 // Give a chance for site and per-namespace customizations of
1732                 // terms of service summary link that might exist separately
1733                 // from the copyright notice.
1734                 //
1735                 // This will display between the save button and the edit tools,
1736                 // so should remain short!
1737                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
1738                 $text = wfMsg( $msg );
1739                 if( !wfEmptyMsg( $msg, $text ) && $text !== '-' ) {
1740                         global $wgOut;
1741                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
1742                         $wgOut->addWikiMsgArray( $msg, array() );
1743                         $wgOut->addHTML( '</div>' );
1744                 }
1745         }
1746
1747         protected function showEditTools() {
1748                 global $wgOut;
1749                 $wgOut->addHTML( '<div class="mw-editTools">' );
1750                 $wgOut->addWikiMsgArray( 'edittools', array(), array( 'content' ) );
1751                 $wgOut->addHTML( '</div>' );
1752         }
1753
1754         protected function getLastDelete() {
1755                 $dbr = wfGetDB( DB_SLAVE );
1756                 $data = $dbr->selectRow(
1757                         array( 'logging', 'user' ),
1758                         array( 'log_type',
1759                                'log_action',
1760                                'log_timestamp',
1761                                'log_user',
1762                                'log_namespace',
1763                                'log_title',
1764                                'log_comment',
1765                                'log_params',
1766                                    'log_deleted',
1767                                'user_name' ),
1768                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1769                                'log_title' => $this->mTitle->getDBkey(),
1770                                'log_type' => 'delete',
1771                                'log_action' => 'delete',
1772                                'user_id=log_user' ),
1773                         __METHOD__,
1774                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
1775                 );
1776                 // Quick paranoid permission checks...
1777                 if( is_object($data) ) {
1778                         if( $data->log_deleted & LogPage::DELETED_USER )
1779                                 $data->user_name = wfMsgHtml('rev-deleted-user');
1780                         if( $data->log_deleted & LogPage::DELETED_COMMENT )
1781                                 $data->log_comment = wfMsgHtml('rev-deleted-comment');
1782                 }
1783                 return $data;
1784         }
1785
1786         /**
1787          * Get the rendered text for previewing.
1788          * @return string
1789          */
1790         function getPreviewText() {
1791                 global $wgOut, $wgUser, $wgTitle, $wgParser, $wgLang, $wgContLang, $wgMessageCache;
1792
1793                 wfProfileIn( __METHOD__ );
1794
1795                 if ( $this->mTriedSave && !$this->mTokenOk ) {
1796                         if ( $this->mTokenOkExceptSuffix ) {
1797                                 $note = wfMsg( 'token_suffix_mismatch' );
1798                         } else {
1799                                 $note = wfMsg( 'session_fail_preview' );
1800                         }
1801                 } else {
1802                         $note = wfMsg( 'previewnote' );
1803                 }
1804
1805                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1806                 $parserOptions->setEditSection( false );
1807                 $parserOptions->setIsPreview( true );
1808                 $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
1809
1810                 global $wgRawHtml;
1811                 if ( $wgRawHtml && !$this->mTokenOk ) {
1812                         // Could be an offsite preview attempt. This is very unsafe if
1813                         // HTML is enabled, as it could be an attack.
1814                         return $wgOut->parse( "<div class='previewnote'>" .
1815                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1816                 }
1817
1818                 # don't parse user css/js, show message about preview
1819                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1820
1821                 if ( $this->isCssJsSubpage ) {
1822                         if (preg_match("/\\.css$/", $this->mTitle->getText() ) ) {
1823                                 $previewtext = wfMsg('usercsspreview');
1824                         } else if (preg_match("/\\.js$/", $this->mTitle->getText() ) ) {
1825                                 $previewtext = wfMsg('userjspreview');
1826                         }
1827                         $parserOptions->setTidy(true);
1828                         $parserOutput = $wgParser->parse( $previewtext, $this->mTitle, $parserOptions );
1829                         $previewHTML = $parserOutput->mText;
1830                 } elseif ( $rt = Title::newFromRedirectArray( $this->textbox1 ) ) {
1831                         $previewHTML = $this->mArticle->viewRedirect( $rt, false );
1832                 } else {
1833                         $toparse = $this->textbox1;
1834
1835                         # If we're adding a comment, we need to show the
1836                         # summary as the headline
1837                         if ( $this->section=="new" && $this->summary!="" ) {
1838                                 $toparse="== {$this->summary} ==\n\n".$toparse;
1839                         }
1840
1841                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData;
1842
1843                         // Parse mediawiki messages with correct target language
1844                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1845                                 list( /* $unused */, $lang ) = $wgMessageCache->figureMessage( $this->mTitle->getText() );
1846                                 $obj = wfGetLangObj( $lang );
1847                                 $parserOptions->setTargetLanguage( $obj );
1848                         }
1849
1850
1851                         $parserOptions->setTidy(true);
1852                         $parserOptions->enableLimitReport();
1853                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ),
1854                                         $this->mTitle, $parserOptions );
1855
1856                         $previewHTML = $parserOutput->getText();
1857                         $this->mParserOutput = $parserOutput;
1858                         $wgOut->addParserOutputNoText( $parserOutput );
1859
1860                         if ( count( $parserOutput->getWarnings() ) ) {
1861                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
1862                         }
1863                 }
1864
1865                 if( $this->isConflict ) {
1866                         $conflict = '<h2 id="mw-previewconflict">' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1867                 } else {
1868                         $conflict = '<hr />';
1869                 }
1870
1871                 $previewhead = "<div class='previewnote'>\n" .
1872                         '<h2 id="mw-previewheader">' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>" .
1873                         $wgOut->parse( $note ) . $conflict . "</div>\n";
1874
1875                 wfProfileOut( __METHOD__ );
1876                 return $previewhead . $previewHTML;
1877         }
1878
1879         function getTemplates() {
1880                 if ( $this->preview || $this->section != '' ) {
1881                         $templates = array();
1882                         if ( !isset($this->mParserOutput) ) return $templates;
1883                         foreach( $this->mParserOutput->getTemplates() as $ns => $template) {
1884                                 foreach( array_keys( $template ) as $dbk ) {
1885                                         $templates[] = Title::makeTitle($ns, $dbk);
1886                                 }
1887                         }
1888                         return $templates;
1889                 } else {
1890                         return $this->mArticle->getUsedTemplates();
1891                 }
1892         }
1893
1894         /**
1895          * Call the stock "user is blocked" page
1896          */
1897         function blockedPage() {
1898                 global $wgOut, $wgUser;
1899                 $wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
1900
1901                 # If the user made changes, preserve them when showing the markup
1902                 # (This happens when a user is blocked during edit, for instance)
1903                 $first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
1904                 if ( $first ) {
1905                         $source = $this->mTitle->exists() ? $this->getContent() : false;
1906                 } else {
1907                         $source = $this->textbox1;
1908                 }
1909
1910                 # Spit out the source or the user's modified version
1911                 if ( $source !== false ) {
1912                         $rows = $wgUser->getIntOption( 'rows' );
1913                         $cols = $wgUser->getIntOption( 'cols' );
1914                         $attribs = array( 'id' => 'wpTextbox1', 'name' => 'wpTextbox1', 'cols' => $cols, 'rows' => $rows, 'readonly' => 'readonly' );
1915                         $wgOut->addHTML( '<hr />' );
1916                         $wgOut->addWikiMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() );
1917                         # Why we don't use Xml::element here?
1918                         # Is it because if $source is '', it returns <textarea />?
1919                         $wgOut->addHTML( Xml::openElement( 'textarea', $attribs ) . htmlspecialchars( $source ) . Xml::closeElement( 'textarea' ) );
1920                 }
1921         }
1922
1923         /**
1924          * Produce the stock "please login to edit pages" page
1925          */
1926         function userNotLoggedInPage() {
1927                 global $wgUser, $wgOut, $wgTitle;
1928                 $skin = $wgUser->getSkin();
1929
1930                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1931                 $loginLink = $skin->link(
1932                         $loginTitle,
1933                         wfMsgHtml( 'loginreqlink' ),
1934                         array(),
1935                         array( 'returnto' => $wgTitle->getPrefixedText() ),
1936                         array( 'known', 'noclasses' )
1937                 );
1938
1939                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1940                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1941                 $wgOut->setArticleRelated( false );
1942
1943                 $wgOut->addHTML( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
1944                 $wgOut->returnToMain( false, $wgTitle );
1945         }
1946
1947         /**
1948          * Creates a basic error page which informs the user that
1949          * they have attempted to edit a nonexistent section.
1950          */
1951         function noSuchSectionPage() {
1952                 global $wgOut, $wgTitle;
1953
1954                 $wgOut->setPageTitle( wfMsg( 'nosuchsectiontitle' ) );
1955                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1956                 $wgOut->setArticleRelated( false );
1957
1958                 $wgOut->addWikiMsg( 'nosuchsectiontext', $this->section );
1959                 $wgOut->returnToMain( false, $wgTitle );
1960         }
1961
1962         /**
1963          * Produce the stock "your edit contains spam" page
1964          *
1965          * @param $match Text which triggered one or more filters
1966          */
1967         function spamPage( $match = false ) {
1968                 global $wgOut, $wgTitle;
1969
1970                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1971                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1972                 $wgOut->setArticleRelated( false );
1973
1974                 $wgOut->addHTML( '<div id="spamprotected">' );
1975                 $wgOut->addWikiMsg( 'spamprotectiontext' );
1976                 if ( $match )
1977                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
1978                 $wgOut->addHTML( '</div>' );
1979
1980                 $wgOut->returnToMain( false, $wgTitle );
1981         }
1982
1983         /**
1984          * @private
1985          * @todo document
1986          */
1987         function mergeChangesInto( &$editText ){
1988                 $fname = 'EditPage::mergeChangesInto';
1989                 wfProfileIn( $fname );
1990
1991                 $db = wfGetDB( DB_MASTER );
1992
1993                 // This is the revision the editor started from
1994                 $baseRevision = $this->getBaseRevision();
1995                 if ( is_null( $baseRevision ) ) {
1996                         wfProfileOut( $fname );
1997                         return false;
1998                 }
1999                 $baseText = $baseRevision->getText();
2000
2001                 // The current state, we want to merge updates into it
2002                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2003                 if ( is_null( $currentRevision ) ) {
2004                         wfProfileOut( $fname );
2005                         return false;
2006                 }
2007                 $currentText = $currentRevision->getText();
2008
2009                 $result = '';
2010                 if ( wfMerge( $baseText, $editText, $currentText, $result ) ) {
2011                         $editText = $result;
2012                         wfProfileOut( $fname );
2013                         return true;
2014                 } else {
2015                         wfProfileOut( $fname );
2016                         return false;
2017                 }
2018         }
2019
2020         /**
2021          * Check if the browser is on a blacklist of user-agents known to
2022          * mangle UTF-8 data on form submission. Returns true if Unicode
2023          * should make it through, false if it's known to be a problem.
2024          * @return bool
2025          * @private
2026          */
2027         function checkUnicodeCompliantBrowser() {
2028                 global $wgBrowserBlackList;
2029                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
2030                         // No User-Agent header sent? Trust it by default...
2031                         return true;
2032                 }
2033                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
2034                 foreach ( $wgBrowserBlackList as $browser ) {
2035                         if ( preg_match($browser, $currentbrowser) ) {
2036                                 return false;
2037                         }
2038                 }
2039                 return true;
2040         }
2041
2042         /**
2043          * @deprecated use $wgParser->stripSectionName()
2044          */
2045         function pseudoParseSectionAnchor( $text ) {
2046                 global $wgParser;
2047                 return $wgParser->stripSectionName( $text );
2048         }
2049
2050         /**
2051          * Format an anchor fragment as it would appear for a given section name
2052          * @param string $text
2053          * @return string
2054          * @private
2055          */
2056         function sectionAnchor( $text ) {
2057                 global $wgParser;
2058                 return $wgParser->guessSectionNameFromWikiText( $text );
2059         }
2060
2061         /**
2062          * Shows a bulletin board style toolbar for common editing functions.
2063          * It can be disabled in the user preferences.
2064          * The necessary JavaScript code can be found in skins/common/edit.js.
2065          *
2066          * @return string
2067          */
2068         static function getEditToolbar() {
2069                 global $wgStylePath, $wgContLang, $wgLang;
2070
2071                 /**
2072                  * toolarray an array of arrays which each include the filename of
2073                  * the button image (without path), the opening tag, the closing tag,
2074                  * and optionally a sample text that is inserted between the two when no
2075                  * selection is highlighted.
2076                  * The tip text is shown when the user moves the mouse over the button.
2077                  *
2078                  * Already here are accesskeys (key), which are not used yet until someone
2079                  * can figure out a way to make them work in IE. However, we should make
2080                  * sure these keys are not defined on the edit page.
2081                  */
2082                 $toolarray = array(
2083                         array(
2084                                 'image'  => $wgLang->getImageFile('button-bold'),
2085                                 'id'     => 'mw-editbutton-bold',
2086                                 'open'   => '\'\'\'',
2087                                 'close'  => '\'\'\'',
2088                                 'sample' => wfMsg('bold_sample'),
2089                                 'tip'    => wfMsg('bold_tip'),
2090                                 'key'    => 'B'
2091                         ),
2092                         array(
2093                                 'image'  => $wgLang->getImageFile('button-italic'),
2094                                 'id'     => 'mw-editbutton-italic',
2095                                 'open'   => '\'\'',
2096                                 'close'  => '\'\'',
2097                                 'sample' => wfMsg('italic_sample'),
2098                                 'tip'    => wfMsg('italic_tip'),
2099                                 'key'    => 'I'
2100                         ),
2101                         array(
2102                                 'image'  => $wgLang->getImageFile('button-link'),
2103                                 'id'     => 'mw-editbutton-link',
2104                                 'open'   => '[[',
2105                                 'close'  => ']]',
2106                                 'sample' => wfMsg('link_sample'),
2107                                 'tip'    => wfMsg('link_tip'),
2108                                 'key'    => 'L'
2109                         ),
2110                         array(
2111                                 'image'  => $wgLang->getImageFile('button-extlink'),
2112                                 'id'     => 'mw-editbutton-extlink',
2113                                 'open'   => '[',
2114                                 'close'  => ']',
2115                                 'sample' => wfMsg('extlink_sample'),
2116                                 'tip'    => wfMsg('extlink_tip'),
2117                                 'key'    => 'X'
2118                         ),
2119                         array(
2120                                 'image'  => $wgLang->getImageFile('button-headline'),
2121                                 'id'     => 'mw-editbutton-headline',
2122                                 'open'   => "\n== ",
2123                                 'close'  => " ==\n",
2124                                 'sample' => wfMsg('headline_sample'),
2125                                 'tip'    => wfMsg('headline_tip'),
2126                                 'key'    => 'H'
2127                         ),
2128                         array(
2129                                 'image'  => $wgLang->getImageFile('button-image'),
2130                                 'id'     => 'mw-editbutton-image',
2131                                 'open'   => '[['.$wgContLang->getNsText(NS_FILE).':',
2132                                 'close'  => ']]',
2133                                 'sample' => wfMsg('image_sample'),
2134                                 'tip'    => wfMsg('image_tip'),
2135                                 'key'    => 'D'
2136                         ),
2137                         array(
2138                                 'image'  => $wgLang->getImageFile('button-media'),
2139                                 'id'     => 'mw-editbutton-media',
2140                                 'open'   => '[['.$wgContLang->getNsText(NS_MEDIA).':',
2141                                 'close'  => ']]',
2142                                 'sample' => wfMsg('media_sample'),
2143                                 'tip'    => wfMsg('media_tip'),
2144                                 'key'    => 'M'
2145                         ),
2146                         array(
2147                                 'image'  => $wgLang->getImageFile('button-math'),
2148                                 'id'     => 'mw-editbutton-math',
2149                                 'open'   => "<math>",
2150                                 'close'  => "</math>",
2151                                 'sample' => wfMsg('math_sample'),
2152                                 'tip'    => wfMsg('math_tip'),
2153                                 'key'    => 'C'
2154                         ),
2155                         array(
2156                                 'image'  => $wgLang->getImageFile('button-nowiki'),
2157                                 'id'     => 'mw-editbutton-nowiki',
2158                                 'open'   => "<nowiki>",
2159                                 'close'  => "</nowiki>",
2160                                 'sample' => wfMsg('nowiki_sample'),
2161                                 'tip'    => wfMsg('nowiki_tip'),
2162                                 'key'    => 'N'
2163                         ),
2164                         array(
2165                                 'image'  => $wgLang->getImageFile('button-sig'),
2166                                 'id'     => 'mw-editbutton-signature',
2167                                 'open'   => '--~~~~',
2168                                 'close'  => '',
2169                                 'sample' => '',
2170                                 'tip'    => wfMsg('sig_tip'),
2171                                 'key'    => 'Y'
2172                         ),
2173                         array(
2174                                 'image'  => $wgLang->getImageFile('button-hr'),
2175                                 'id'     => 'mw-editbutton-hr',
2176                                 'open'   => "\n----\n",
2177                                 'close'  => '',
2178                                 'sample' => '',
2179                                 'tip'    => wfMsg('hr_tip'),
2180                                 'key'    => 'R'
2181                         )
2182                 );
2183                 $toolbar = "<div id='toolbar'>\n";
2184
2185                 $script = '';
2186                 foreach ( $toolarray as $tool ) {
2187                         $params = array(
2188                                 $image = $wgStylePath.'/common/images/'.$tool['image'],
2189                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
2190                                 // Older browsers show a "speedtip" type message only for ALT.
2191                                 // Ideally these should be different, realistically they
2192                                 // probably don't need to be.
2193                                 $tip = $tool['tip'],
2194                                 $open = $tool['open'],
2195                                 $close = $tool['close'],
2196                                 $sample = $tool['sample'],
2197                                 $cssId = $tool['id'],
2198                         );
2199
2200                         $paramList = implode( ',',
2201                                 array_map( array( 'Xml', 'encodeJsVar' ), $params ) );
2202                         $script .= "addButton($paramList);\n";
2203                 }
2204                 $toolbar .= Html::inlineScript( "\n$script\n" );
2205
2206                 $toolbar .= "\n</div>";
2207
2208                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
2209
2210                 return $toolbar;
2211         }
2212
2213         /**
2214          * Returns an array of html code of the following checkboxes:
2215          * minor and watch
2216          *
2217          * @param $tabindex Current tabindex
2218          * @param $skin Skin object
2219          * @param $checked Array of checkbox => bool, where bool indicates the checked
2220          *                 status of the checkbox
2221          *
2222          * @return array
2223          */
2224         public function getCheckboxes( &$tabindex, $skin, $checked ) {
2225                 global $wgUser;
2226
2227                 $checkboxes = array();
2228
2229                 $checkboxes['minor'] = '';
2230                 $minorLabel = wfMsgExt('minoredit', array('parseinline'));
2231                 if ( $wgUser->isAllowed('minoredit') ) {
2232                         $attribs = array(
2233                                 'tabindex'  => ++$tabindex,
2234                                 'accesskey' => wfMsg( 'accesskey-minoredit' ),
2235                                 'id'        => 'wpMinoredit',
2236                         );
2237                         $checkboxes['minor'] =
2238                                 Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
2239                                 "&nbsp;<label for='wpMinoredit'".$skin->tooltip('minoredit', 'withaccess').">{$minorLabel}</label>";
2240                 }
2241
2242                 $watchLabel = wfMsgExt('watchthis', array('parseinline'));
2243                 $checkboxes['watch'] = '';
2244                 if ( $wgUser->isLoggedIn() ) {
2245                         $attribs = array(
2246                                 'tabindex'  => ++$tabindex,
2247                                 'accesskey' => wfMsg( 'accesskey-watch' ),
2248                                 'id'        => 'wpWatchthis',
2249                         );
2250                         $checkboxes['watch'] =
2251                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
2252                                 "&nbsp;<label for='wpWatchthis'".$skin->tooltip('watch', 'withaccess').">{$watchLabel}</label>";
2253                 }
2254                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
2255                 return $checkboxes;
2256         }
2257
2258         /**
2259          * Returns an array of html code of the following buttons:
2260          * save, diff, preview and live
2261          *
2262          * @param $tabindex Current tabindex
2263          *
2264          * @return array
2265          */
2266         public function getEditButtons(&$tabindex) {
2267                 global $wgLivePreview, $wgUser;
2268
2269                 $buttons = array();
2270
2271                 $temp = array(
2272                         'id'        => 'wpSave',
2273                         'name'      => 'wpSave',
2274                         'type'      => 'submit',
2275                         'tabindex'  => ++$tabindex,
2276                         'value'     => wfMsg('savearticle'),
2277                         'accesskey' => wfMsg('accesskey-save'),
2278                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
2279                 );
2280                 $buttons['save'] = Xml::element('input', $temp, '');
2281
2282                 ++$tabindex; // use the same for preview and live preview
2283                 if ( $wgLivePreview && $wgUser->getOption( 'uselivepreview' ) ) {
2284                         $this->doLivePreviewScript(); // Add to output
2285
2286                         $temp = array(
2287                                 'id'        => 'wpPreview',
2288                                 'name'      => 'wpPreview',
2289                                 'type'      => 'submit',
2290                                 'tabindex'  => $tabindex,
2291                                 'value'     => wfMsg('showpreview'),
2292                                 'accesskey' => '',
2293                                 'title'     => wfMsg( 'tooltip-preview' ).' ['.wfMsg( 'accesskey-preview' ).']',
2294                                 'style'     => 'display: none;',
2295                         );
2296                         $buttons['preview'] = Xml::element('input', $temp, '');
2297
2298                         $temp = array(
2299                                 'id'        => 'wpLivePreview',
2300                                 'name'      => 'wpLivePreview',
2301                                 'type'      => 'submit',
2302                                 'tabindex'  => $tabindex,
2303                                 'value'     => wfMsg('showlivepreview'),
2304                                 'accesskey' => wfMsg('accesskey-preview'),
2305                                 'title'     => '',
2306                         );
2307
2308                         $buttons['live'] = Xml::element('input', $temp, '');
2309                 } else {
2310                         $temp = array(
2311                                 'id'        => 'wpPreview',
2312                                 'name'      => 'wpPreview',
2313                                 'type'      => 'submit',
2314                                 'tabindex'  => $tabindex,
2315                                 'value'     => wfMsg('showpreview'),
2316                                 'accesskey' => wfMsg('accesskey-preview'),
2317                                 'title'     => wfMsg( 'tooltip-preview' ).' ['.wfMsg( 'accesskey-preview' ).']',
2318                         );
2319                         $buttons['preview'] = Xml::element('input', $temp, '');
2320                         $buttons['live'] = '';
2321                 }
2322
2323                 $temp = array(
2324                         'id'        => 'wpDiff',
2325                         'name'      => 'wpDiff',
2326                         'type'      => 'submit',
2327                         'tabindex'  => ++$tabindex,
2328                         'value'     => wfMsg('showdiff'),
2329                         'accesskey' => wfMsg('accesskey-diff'),
2330                         'title'     => wfMsg( 'tooltip-diff' ).' ['.wfMsg( 'accesskey-diff' ).']',
2331                 );
2332                 $buttons['diff'] = Xml::element('input', $temp, '');
2333
2334                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
2335                 return $buttons;
2336         }
2337
2338
2339         /**
2340          * Get a diff between the current contents of the edit box and the
2341          * version of the page we're editing from.
2342          *
2343          * If this is a section edit, we'll replace the section as for final
2344          * save and then make a comparison.
2345          */
2346         function showDiff() {
2347                 $oldtext = $this->mArticle->fetchContent();
2348                 $newtext = $this->mArticle->replaceSection(
2349                         $this->section, $this->textbox1, $this->summary, $this->edittime );
2350                 $newtext = $this->mArticle->preSaveTransform( $newtext );
2351                 $oldtitle = wfMsgExt( 'currentrev', array('parseinline') );
2352                 $newtitle = wfMsgExt( 'yourtext', array('parseinline') );
2353                 if ( $oldtext !== false  || $newtext != '' ) {
2354                         $de = new DifferenceEngine( $this->mTitle );
2355                         $de->setText( $oldtext, $newtext );
2356                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2357                         $de->showDiffStyle();
2358                 } else {
2359                         $difftext = '';
2360                 }
2361
2362                 global $wgOut;
2363                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2364         }
2365
2366         /**
2367          * Filter an input field through a Unicode de-armoring process if it
2368          * came from an old browser with known broken Unicode editing issues.
2369          *
2370          * @param WebRequest $request
2371          * @param string $field
2372          * @return string
2373          * @private
2374          */
2375         function safeUnicodeInput( $request, $field ) {
2376                 $text = rtrim( $request->getText( $field ) );
2377                 return $request->getBool( 'safemode' )
2378                         ? $this->unmakesafe( $text )
2379                         : $text;
2380         }
2381
2382         /**
2383          * Filter an output field through a Unicode armoring process if it is
2384          * going to an old browser with known broken Unicode editing issues.
2385          *
2386          * @param string $text
2387          * @return string
2388          * @private
2389          */
2390         function safeUnicodeOutput( $text ) {
2391                 global $wgContLang;
2392                 $codedText = $wgContLang->recodeForEdit( $text );
2393                 return $this->checkUnicodeCompliantBrowser()
2394                         ? $codedText
2395                         : $this->makesafe( $codedText );
2396         }
2397
2398         /**
2399          * A number of web browsers are known to corrupt non-ASCII characters
2400          * in a UTF-8 text editing environment. To protect against this,
2401          * detected browsers will be served an armored version of the text,
2402          * with non-ASCII chars converted to numeric HTML character references.
2403          *
2404          * Preexisting such character references will have a 0 added to them
2405          * to ensure that round-trips do not alter the original data.
2406          *
2407          * @param string $invalue
2408          * @return string
2409          * @private
2410          */
2411         function makesafe( $invalue ) {
2412                 // Armor existing references for reversability.
2413                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
2414
2415                 $bytesleft = 0;
2416                 $result = "";
2417                 $working = 0;
2418                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2419                         $bytevalue = ord( $invalue{$i} );
2420                         if ( $bytevalue <= 0x7F ) { //0xxx xxxx
2421                                 $result .= chr( $bytevalue );
2422                                 $bytesleft = 0;
2423                         } elseif ( $bytevalue <= 0xBF ) { //10xx xxxx
2424                                 $working = $working << 6;
2425                                 $working += ($bytevalue & 0x3F);
2426                                 $bytesleft--;
2427                                 if ( $bytesleft <= 0 ) {
2428                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
2429                                 }
2430                         } elseif ( $bytevalue <= 0xDF ) { //110x xxxx
2431                                 $working = $bytevalue & 0x1F;
2432                                 $bytesleft = 1;
2433                         } elseif ( $bytevalue <= 0xEF ) { //1110 xxxx
2434                                 $working = $bytevalue & 0x0F;
2435                                 $bytesleft = 2;
2436                         } else { //1111 0xxx
2437                                 $working = $bytevalue & 0x07;
2438                                 $bytesleft = 3;
2439                         }
2440                 }
2441                 return $result;
2442         }
2443
2444         /**
2445          * Reverse the previously applied transliteration of non-ASCII characters
2446          * back to UTF-8. Used to protect data from corruption by broken web browsers
2447          * as listed in $wgBrowserBlackList.
2448          *
2449          * @param string $invalue
2450          * @return string
2451          * @private
2452          */
2453         function unmakesafe( $invalue ) {
2454                 $result = "";
2455                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2456                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
2457                                 $i += 3;
2458                                 $hexstring = "";
2459                                 do {
2460                                         $hexstring .= $invalue{$i};
2461                                         $i++;
2462                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
2463
2464                                 // Do some sanity checks. These aren't needed for reversability,
2465                                 // but should help keep the breakage down if the editor
2466                                 // breaks one of the entities whilst editing.
2467                                 if ( (substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6) ) {
2468                                         $codepoint = hexdec($hexstring);
2469                                         $result .= codepointToUtf8( $codepoint );
2470                                 } else {
2471                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
2472                                 }
2473                         } else {
2474                                 $result .= substr( $invalue, $i, 1 );
2475                         }
2476                 }
2477                 // reverse the transform that we made for reversability reasons.
2478                 return strtr( $result, array( "&#x0" => "&#x" ) );
2479         }
2480
2481         function noCreatePermission() {
2482                 global $wgOut;
2483                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
2484                 $wgOut->addWikiMsg( 'nocreatetext' );
2485         }
2486
2487         /**
2488          * Attempt submission
2489          * @return bool false if output is done, true if the rest of the form should be displayed
2490          */
2491         function attemptSave() {
2492                 global $wgUser, $wgOut, $wgTitle, $wgRequest;
2493
2494                 $resultDetails = false;
2495                 # Allow bots to exempt some edits from bot flagging
2496                 $bot = $wgUser->isAllowed('bot') && $wgRequest->getBool('bot',true);
2497                 $value = $this->internalAttemptSave( $resultDetails, $bot );
2498
2499                 if ( $value == self::AS_SUCCESS_UPDATE || $value == self::AS_SUCCESS_NEW_ARTICLE ) {
2500                         $this->didSave = true;
2501                 }
2502
2503                 switch ($value) {
2504                         case self::AS_HOOK_ERROR_EXPECTED:
2505                         case self::AS_CONTENT_TOO_BIG:
2506                         case self::AS_ARTICLE_WAS_DELETED:
2507                         case self::AS_CONFLICT_DETECTED:
2508                         case self::AS_SUMMARY_NEEDED:
2509                         case self::AS_TEXTBOX_EMPTY:
2510                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
2511                         case self::AS_END:
2512                                 return true;
2513
2514                         case self::AS_HOOK_ERROR:
2515                         case self::AS_FILTERING:
2516                         case self::AS_SUCCESS_NEW_ARTICLE:
2517                         case self::AS_SUCCESS_UPDATE:
2518                                 return false;
2519
2520                         case self::AS_SPAM_ERROR:
2521                                 $this->spamPage ( $resultDetails['spam'] );
2522                                 return false;
2523
2524                         case self::AS_BLOCKED_PAGE_FOR_USER:
2525                                 $this->blockedPage();
2526                                 return false;
2527
2528                         case self::AS_IMAGE_REDIRECT_ANON:
2529                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
2530                                 return false;
2531
2532                         case self::AS_READ_ONLY_PAGE_ANON:
2533                                 $this->userNotLoggedInPage();
2534                                 return false;
2535
2536                         case self::AS_READ_ONLY_PAGE_LOGGED:
2537                         case self::AS_READ_ONLY_PAGE:
2538                                 $wgOut->readOnlyPage();
2539                                 return false;
2540
2541                         case self::AS_RATE_LIMITED:
2542                                 $wgOut->rateLimited();
2543                                 return false;
2544
2545                         case self::AS_NO_CREATE_PERMISSION;
2546                                 $this->noCreatePermission();
2547                                 return;
2548
2549                         case self::AS_BLANK_ARTICLE:
2550                                 $wgOut->redirect( $wgTitle->getFullURL() );
2551                                 return false;
2552
2553                         case self::AS_IMAGE_REDIRECT_LOGGED:
2554                                 $wgOut->permissionRequired( 'upload' );
2555                                 return false;
2556                 }
2557         }
2558
2559         function getBaseRevision() {
2560                 if ( $this->mBaseRevision == false ) {
2561                         $db = wfGetDB( DB_MASTER );
2562                         $baseRevision = Revision::loadFromTimestamp(
2563                                 $db, $this->mTitle, $this->edittime );
2564                         return $this->mBaseRevision = $baseRevision;
2565                 } else {
2566                         return $this->mBaseRevision;
2567                 }
2568         }
2569 }