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