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