includes/EditPage.php

   1 <?php
   2 /**
   3  * Contains the EditPage class
   4  * @file
   5  */
   6
   7 /**
   8  * The edit page/HTML interface (split from Article)
   9  * The actual database and text munging is still in Article,
  10  * but it should get easier to call those from alternate
  11  * interfaces.
  12  *
  13  * EditPage cares about two distinct titles:
  14  * $wgTitle is the page that forms submit to, links point to,
  15  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  16  * page in the database that is actually being edited. These are
  17  * usually the same, but they are now allowed to be different.
  18  */
  19 class EditPage {
  20         const AS_SUCCESS_UPDATE                 = 200;
  21         const AS_SUCCESS_NEW_ARTICLE            = 201;
  22         const AS_HOOK_ERROR                     = 210;
  23         const AS_FILTERING                      = 211;
  24         const AS_HOOK_ERROR_EXPECTED            = 212;
  25         const AS_BLOCKED_PAGE_FOR_USER          = 215;
  26         const AS_CONTENT_TOO_BIG                = 216;
  27         const AS_USER_CANNOT_EDIT               = 217;
  28         const AS_READ_ONLY_PAGE_ANON            = 218;
  29         const AS_READ_ONLY_PAGE_LOGGED          = 219;
  30         const AS_READ_ONLY_PAGE                 = 220;
  31         const AS_RATE_LIMITED                   = 221;
  32         const AS_ARTICLE_WAS_DELETED            = 222;
  33         const AS_NO_CREATE_PERMISSION           = 223;
  34         const AS_BLANK_ARTICLE                  = 224;
  35         const AS_CONFLICT_DETECTED              = 225;
  36         const AS_SUMMARY_NEEDED                 = 226;
  37         const AS_TEXTBOX_EMPTY                  = 228;
  38         const AS_MAX_ARTICLE_SIZE_EXCEEDED      = 229;
  39         const AS_OK                             = 230;
  40         const AS_END                            = 231;
  41         const AS_SPAM_ERROR                     = 232;
  42         const AS_IMAGE_REDIRECT_ANON            = 233;
  43         const AS_IMAGE_REDIRECT_LOGGED          = 234;
  44
  45         var $mArticle;
  46         var $mTitle;
  47         var $action;
  48         var $mMetaData = '';
  49         var $isConflict = false;
  50         var $isCssJsSubpage = false;
  51         var $isCssSubpage = false;
  52         var $isJsSubpage = false;
  53         var $deletedSinceEdit = false;
  54         var $formtype;
  55         var $firsttime;
  56         var $lastDelete;
  57         var $mTokenOk = false;
  58         var $mTokenOkExceptSuffix = false;
  59         var $mTriedSave = false;
  60         var $tooBig = false;
  61         var $kblength = false;
  62         var $missingComment = false;
  63         var $missingSummary = false;
  64         var $allowBlankSummary = false;
  65         var $autoSumm = '';
  66         var $hookError = '';
  67         #var $mPreviewTemplates;
  68         var $mParserOutput;
  69         var $mBaseRevision = false;
  70
  71         # Form values
  72         var $save = false, $preview = false, $diff = false;
  73         var $minoredit = false, $watchthis = false, $recreate = false;
  74         var $textbox1 = '', $textbox2 = '', $summary = '';
  75         var $edittime = '', $section = '', $starttime = '';
  76         var $oldid = 0, $editintro = '', $scrolltop = null;
  77
  78         # Placeholders for text injection by hooks (must be HTML)
  79         # extensions should take care to _append_ to the present value
  80         public $editFormPageTop; // Before even the preview
  81         public $editFormTextTop;
  82         public $editFormTextBeforeContent;
  83         public $editFormTextAfterWarn;
  84         public $editFormTextAfterTools;
  85         public $editFormTextBottom;
  86         public $editFormTextAfterContent;
  87         public $previewTextAfterContent;
  88
  89         /* $didSave should be set to true whenever an article was succesfully altered. */
  90         public $didSave = false;
  91         public $undidRev = 0;
  92
  93         public $suppressIntro = false;
  94
  95         /**
  96          * @todo document
  97          * @param $article
  98          */
  99         function EditPage( $article ) {
 100                 $this->mArticle =& $article;
 101                 $this->mTitle = $article->getTitle();
 102                 $this->action = 'submit';
 103
 104                 # Placeholders for text injection by hooks (empty per default)
 105                 $this->editFormPageTop =
 106                 $this->editFormTextTop =
 107                 $this->editFormTextBeforeContent =
 108                 $this->editFormTextAfterWarn =
 109                 $this->editFormTextAfterTools =
 110                 $this->editFormTextBottom =
 111                 $this->editFormTextAfterContent =
 112                 $this->previewTextAfterContent =
 113                 $this->mPreloadText = "";
 114         }
 115
 116         function getArticle() {
 117                 return $this->mArticle;
 118         }
 119
 120
 121         /**
 122          * Fetch initial editing page content.
 123          * @private
 124          */
 125         function getContent( $def_text = '' ) {
 126                 global $wgOut, $wgRequest, $wgParser, $wgContLang, $wgMessageCache;
 127
 128                 wfProfileIn( __METHOD__ );
 129                 # Get variables from query string :P
 130                 $section = $wgRequest->getVal( 'section' );
 131                 $preload = $wgRequest->getVal( 'preload' );
 132                 $undoafter = $wgRequest->getVal( 'undoafter' );
 133                 $undo = $wgRequest->getVal( 'undo' );
 134
 135                 $text = '';
 136                 // For message page not locally set, use the i18n message.
 137                 // For other non-existent articles, use preload text if any.
 138                 if ( !$this->mTitle->exists() ) {
 139                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 140                                 # If this is a system message, get the default text.
 141                                 list( $message, $lang ) = $wgMessageCache->figureMessage( $wgContLang->lcfirst( $this->mTitle->getText() ) );
 142                                 $wgMessageCache->loadAllMessages( $lang );
 143                                 $text = wfMsgGetKey( $message, false, $lang, false );
 144                                 if( wfEmptyMsg( $message, $text ) )
 145                                         $text = $this->getPreloadedText( $preload );
 146                         } else {
 147                                 # If requested, preload some text.
 148                                 $text = $this->getPreloadedText( $preload );
 149                         }
 150                 // For existing pages, get text based on "undo" or section parameters.
 151                 } else {
 152                         $text = $this->mArticle->getContent();
 153                         if ( $undo > 0 && $undoafter > 0 && $undo < $undoafter ) {
 154                                 # If they got undoafter and undo round the wrong way, switch them
 155                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 156                         }
 157                         if ( $undo > 0 && $undo > $undoafter ) {
 158                                 # Undoing a specific edit overrides section editing; section-editing
 159                                 # doesn't work with undoing.
 160                                 if ( $undoafter ) {
 161                                         $undorev = Revision::newFromId( $undo );
 162                                         $oldrev = Revision::newFromId( $undoafter );
 163                                 } else {
 164                                         $undorev = Revision::newFromId( $undo );
 165                                         $oldrev = $undorev ? $undorev->getPrevious() : null;
 166                                 }
 167
 168                                 # Sanity check, make sure it's the right page,
 169                                 # the revisions exist and they were not deleted.
 170                                 # Otherwise, $text will be left as-is.
 171                                 if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 172                                         $undorev->getPage() == $oldrev->getPage() &&
 173                                         $undorev->getPage() == $this->mArticle->getID() &&
 174                                         !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 175                                         !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 176
 177                                         $undotext = $this->mArticle->getUndoText( $undorev, $oldrev );
 178                                         if ( $undotext === false ) {
 179                                                 # Warn the user that something went wrong
 180                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-failure">' . wfMsgNoTrans( 'undo-failure' ) . '</div>' );
 181                                         } else {
 182                                                 $text = $undotext;
 183                                                 # Inform the user of our success and set an automatic edit summary
 184                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="mw-undo-success">' . wfMsgNoTrans( 'undo-success' ) . '</div>' );
 185                                                 $firstrev = $oldrev->getNext();
 186                                                 # If we just undid one rev, use an autosummary
 187                                                 if ( $firstrev->mId == $undo ) {
 188                                                         $this->summary = wfMsgForContent( 'undo-summary', $undo, $undorev->getUserText() );
 189                                                         $this->undidRev = $undo;
 190                                                 }
 191                                                 $this->formtype = 'diff';
 192                                         }
 193                                 } else {
 194                                         // Failed basic sanity checks.
 195                                         // Older revisions may have been removed since the link
 196                                         // was created, or we may simply have got bogus input.
 197                                         $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-norev">' . wfMsgNoTrans( 'undo-norev' ) . '</div>' );
 198                                 }
 199                         } else if ( $section != '' ) {
 200                                 if ( $section == 'new' ) {
 201                                         $text = $this->getPreloadedText( $preload );
 202                                 } else {
 203                                         $text = $wgParser->getSection( $text, $section, $def_text );
 204                                 }
 205                         }
 206                 }
 207
 208                 wfProfileOut( __METHOD__ );
 209                 return $text;
 210         }
 211
 212         /** Use this method before edit() to preload some text into the edit box */
 213         public function setPreloadedText( $text ) {
 214                 $this->mPreloadText = $text;
 215         }
 216
 217         /**
 218          * Get the contents of a page from its title and remove includeonly tags
 219          *
 220          * @param $preload String: the title of the page.
 221          * @return string The contents of the page.
 222          */
 223         protected function getPreloadedText( $preload ) {
 224                 if ( !empty( $this->mPreloadText ) ) {
 225                         return $this->mPreloadText;
 226                 } elseif ( $preload === '' ) {
 227                         return '';
 228                 } else {
 229                         $preloadTitle = Title::newFromText( $preload );
 230                         if ( isset( $preloadTitle ) && $preloadTitle->userCanRead() ) {
 231                                 $rev = Revision::newFromTitle( $preloadTitle );
 232                                 if ( is_object( $rev ) ) {
 233                                         $text = $rev->getText();
 234                                         // TODO FIXME: AAAAAAAAAAA, this shouldn't be implementing
 235                                         // its own mini-parser! -ævar
 236                                         $text = preg_replace( '~</?includeonly>~', '', $text );
 237                                         return $text;
 238                                 } else
 239                                         return '';
 240                         }
 241                 }
 242         }
 243
 244         /**
 245          * This is the function that extracts metadata from the article body on the first view.
 246          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
 247          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
 248          */
 249         function extractMetaDataFromArticle () {
 250                 global $wgUseMetadataEdit, $wgMetadataWhitelist, $wgContLang;
 251                 $this->mMetaData = '';
 252                 if ( !$wgUseMetadataEdit ) return;
 253                 if ( $wgMetadataWhitelist == '' ) return;
 254                 $s = '';
 255                 $t = $this->getContent();
 256
 257                 # MISSING : <nowiki> filtering
 258
 259                 # Categories and language links
 260                 $t = explode( "\n" , $t );
 261                 $catlow = strtolower( $wgContLang->getNsText( NS_CATEGORY ) );
 262                 $cat = $ll = array();
 263                 foreach ( $t as $key => $x ) {
 264                         $y = trim( strtolower ( $x ) );
 265                         while ( substr( $y , 0 , 2 ) == '[[' ) {
 266                                 $y = explode( ']]' , trim ( $x ) );
 267                                 $first = array_shift( $y );
 268                                 $first = explode( ':' , $first );
 269                                 $ns = array_shift( $first );
 270                                 $ns = trim( str_replace( '[' , '' , $ns ) );
 271                                 if ( $wgContLang->getLanguageName( $ns ) || strtolower( $ns ) == $catlow ) {
 272                                         $add = '[[' . $ns . ':' . implode( ':' , $first ) . ']]';
 273                                         if ( strtolower( $ns ) == $catlow ) $cat[] = $add;
 274                                         else $ll[] = $add;
 275                                         $x = implode( ']]', $y );
 276                                         $t[$key] = $x;
 277                                         $y = trim( strtolower( $x ) );
 278                                 } else {
 279                                         $x = implode( ']]' , $y );
 280                                         $y = trim( strtolower( $x ) );
 281                                 }
 282                         }
 283                 }
 284                 if ( count( $cat ) ) $s .= implode( ' ' , $cat ) . "\n";
 285                 if ( count( $ll ) ) $s .= implode( ' ' , $ll ) . "\n";
 286                 $t = implode( "\n" , $t );
 287
 288                 # Load whitelist
 289                 $sat = array () ; # stand-alone-templates; must be lowercase
 290                 $wl_title = Title::newFromText( $wgMetadataWhitelist );
 291                 $wl_article = new Article ( $wl_title );
 292                 $wl = explode ( "\n" , $wl_article->getContent() );
 293                 foreach ( $wl AS $x ) {
 294                         $isentry = false;
 295                         $x = trim ( $x );
 296                         while ( substr ( $x , 0 , 1 ) == '*' ) {
 297                                 $isentry = true;
 298                                 $x = trim ( substr ( $x , 1 ) );
 299                         }
 300                         if ( $isentry ) {
 301                                 $sat[] = strtolower ( $x );
 302                         }
 303
 304                 }
 305
 306                 # Templates, but only some
 307                 $t = explode( '{{' , $t );
 308                 $tl = array() ;
 309                 foreach ( $t as $key => $x ) {
 310                         $y = explode( '}}' , $x , 2 );
 311                         if ( count( $y ) == 2 ) {
 312                                 $z = $y[0];
 313                                 $z = explode( '|' , $z );
 314                                 $tn = array_shift( $z );
 315                                 if ( in_array( strtolower( $tn ) , $sat ) ) {
 316                                         $tl[] = '{{' . $y[0] . '}}';
 317                                         $t[$key] = $y[1];
 318                                         $y = explode( '}}' , $y[1] , 2 );
 319                                 }
 320                                 else $t[$key] = '{{' . $x;
 321                         }
 322                         else if ( $key != 0 ) $t[$key] = '{{' . $x;
 323                         else $t[$key] = $x;
 324                 }
 325                 if ( count( $tl ) ) $s .= implode( ' ' , $tl );
 326                 $t = implode( '' , $t );
 327
 328                 $t = str_replace( "\n\n\n", "\n", $t );
 329                 $this->mArticle->mContent = $t;
 330                 $this->mMetaData = $s;
 331         }
 332
 333         /*
 334          * Check if a page was deleted while the user was editing it, before submit.
 335          * Note that we rely on the logging table, which hasn't been always there,
 336          * but that doesn't matter, because this only applies to brand new
 337          * deletes.
 338          */
 339         protected function wasDeletedSinceLastEdit() {
 340                 if ( $this->deletedSinceEdit )
 341                         return true;
 342                 if ( $this->mTitle->isDeletedQuick() ) {
 343                         $this->lastDelete = $this->getLastDelete();
 344                         if ( $this->lastDelete ) {
 345                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
 346                                 if ( $deleteTime > $this->starttime ) {
 347                                         $this->deletedSinceEdit = true;
 348                                 }
 349                         }
 350                 }
 351                 return $this->deletedSinceEdit;
 352         }
 353
 354         function submit() {
 355                 $this->edit();
 356         }
 357
 358         /**
 359          * This is the function that gets called for "action=edit". It
 360          * sets up various member variables, then passes execution to
 361          * another function, usually showEditForm()
 362          *
 363          * The edit form is self-submitting, so that when things like
 364          * preview and edit conflicts occur, we get the same form back
 365          * with the extra stuff added.  Only when the final submission
 366          * is made and all is well do we actually save and redirect to
 367          * the newly-edited page.
 368          */
 369         function edit() {
 370                 global $wgOut, $wgRequest, $wgEnableJS2system;
 371                 // Allow extensions to modify/prevent this form or submission
 372                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 373                         return;
 374                 }
 375
 376                 wfProfileIn( __METHOD__ );
 377                 wfDebug( __METHOD__.": enter\n" );
 378
 379                 // This is not an article
 380                 $wgOut->setArticleFlag( false );
 381
 382                 $this->importFormData( $wgRequest );
 383                 $this->firsttime = false;
 384
 385                 if ( $this->live ) {
 386                         $this->livePreview();
 387                         wfProfileOut( __METHOD__ );
 388                         return;
 389                 }
 390
 391                 if ( wfReadOnly() && $this->save ) {
 392                         // Force preview
 393                         $this->save = false;
 394                         $this->preview = true;
 395                 }
 396
 397                 $wgOut->addScriptFile( 'edit.js' );
 398
 399                 if( $wgEnableJS2system )
 400                     $wgOut->addScriptClass( 'editPage' );
 401
 402                 $permErrors = $this->getEditPermissionErrors();
 403                 if ( $permErrors ) {
 404                         wfDebug( __METHOD__ . ": User can't edit\n" );
 405                         $this->readOnlyPage( $this->getContent(), true, $permErrors, 'edit' );
 406                         wfProfileOut( __METHOD__ );
 407                         return;
 408                 } else {
 409                         if ( $this->save ) {
 410                                 $this->formtype = 'save';
 411                         } else if ( $this->preview ) {
 412                                 $this->formtype = 'preview';
 413                         } else if ( $this->diff ) {
 414                                 $this->formtype = 'diff';
 415                         } else { # First time through
 416                                 $this->firsttime = true;
 417                                 if ( $this->previewOnOpen() ) {
 418                                         $this->formtype = 'preview';
 419                                 } else {
 420                                         $this->extractMetaDataFromArticle () ;
 421                                         $this->formtype = 'initial';
 422                                 }
 423                         }
 424                 }
 425
 426                 // If they used redlink=1 and the page exists, redirect to the main article
 427                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 428                         $wgOut->redirect( $this->mTitle->getFullURL() );
 429                 }
 430
 431                 wfProfileIn( __METHOD__."-business-end" );
 432
 433                 $this->isConflict = false;
 434                 // css / js subpages of user pages get a special treatment
 435                 $this->isCssJsSubpage      = $this->mTitle->isCssJsSubpage();
 436                 $this->isCssSubpage        = $this->mTitle->isCssSubpage();
 437                 $this->isJsSubpage         = $this->mTitle->isJsSubpage();
 438                 $this->isValidCssJsSubpage = $this->mTitle->isValidCssJsSubpage();
 439
 440                 # Show applicable editing introductions
 441                 if ( $this->formtype == 'initial' || $this->firsttime )
 442                         $this->showIntro();
 443
 444                 if ( $this->mTitle->isTalkPage() ) {
 445                         $wgOut->addWikiMsg( 'talkpagetext' );
 446                 }
 447
 448                 # Optional notices on a per-namespace and per-page basis
 449                 $editnotice_ns   = 'editnotice-'.$this->mTitle->getNamespace();
 450                 if ( !wfEmptyMsg( $editnotice_ns, wfMsgForContent( $editnotice_ns ) ) ) {
 451                         $wgOut->addWikiText( wfMsgForContent( $editnotice_ns )  );
 452                 }
 453                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
 454                         $parts = explode( '/', $this->mTitle->getDBkey() );
 455                         $editnotice_base = $editnotice_ns;
 456                         while ( count( $parts ) > 0 ) {
 457                                 $editnotice_base .= '-'.array_shift( $parts );
 458                                 if ( !wfEmptyMsg( $editnotice_base, wfMsgForContent( $editnotice_base ) ) ) {
 459                                         $wgOut->addWikiText( wfMsgForContent( $editnotice_base )  );
 460                                 }
 461                         }
 462                 }
 463
 464                 # Attempt submission here.  This will check for edit conflicts,
 465                 # and redundantly check for locked database, blocked IPs, etc.
 466                 # that edit() already checked just in case someone tries to sneak
 467                 # in the back door with a hand-edited submission URL.
 468
 469                 if ( 'save' == $this->formtype ) {
 470                         if ( !$this->attemptSave() ) {
 471                                 wfProfileOut( __METHOD__."-business-end" );
 472                                 wfProfileOut( __METHOD__ );
 473                                 return;
 474                         }
 475                 }
 476
 477                 # First time through: get contents, set time for conflict
 478                 # checking, etc.
 479                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 480                         if ( $this->initialiseForm() === false ) {
 481                                 $this->noSuchSectionPage();
 482                                 wfProfileOut( __METHOD__."-business-end" );
 483                                 wfProfileOut( __METHOD__ );
 484                                 return;
 485                         }
 486                         if ( !$this->mTitle->getArticleId() )
 487                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 488                 }
 489
 490                 $this->showEditForm();
 491                 wfProfileOut( __METHOD__."-business-end" );
 492                 wfProfileOut( __METHOD__ );
 493         }
 494
 495         protected function getEditPermissionErrors() {
 496                 global $wgUser;
 497                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 498                 # Can this title be created?
 499                 if ( !$this->mTitle->exists() ) {
 500                         $permErrors = array_merge( $permErrors,
 501                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 502                 }
 503                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 504                 $remove = array();
 505                 foreach( $permErrors as $error ) {
 506                         if ( ( $this->preview || $this->diff ) &&
 507                                 ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' ) )
 508                         {
 509                                 $remove[] = $error;
 510                         }
 511                 }
 512                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 513                 return $permErrors;
 514         }
 515
 516         /**
 517          * Show a read-only error
 518          * Parameters are the same as OutputPage:readOnlyPage()
 519          * Redirect to the article page if redlink=1
 520          */
 521         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 522                 global $wgRequest, $wgOut;
 523                 if ( $wgRequest->getBool( 'redlink' ) ) {
 524                         // The edit page was reached via a red link.
 525                         // Redirect to the article page and let them click the edit tab if
 526                         // they really want a permission error.
 527                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 528                 } else {
 529                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 530                 }
 531         }
 532
 533         /**
 534          * Should we show a preview when the edit form is first shown?
 535          *
 536          * @return bool
 537          */
 538         protected function previewOnOpen() {
 539                 global $wgRequest, $wgUser;
 540                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 541                         // Explicit override from request
 542                         return true;
 543                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 544                         // Explicit override from request
 545                         return false;
 546                 } elseif ( $this->section == 'new' ) {
 547                         // Nothing *to* preview for new sections
 548                         return false;
 549                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 550                         // Standard preference behaviour
 551                         return true;
 552                 } elseif ( !$this->mTitle->exists() && $this->mTitle->getNamespace() == NS_CATEGORY ) {
 553                         // Categories are special
 554                         return true;
 555                 } else {
 556                         return false;
 557                 }
 558         }
 559
 560         /**
 561          * @todo document
 562          * @param $request
 563          */
 564         function importFormData( &$request ) {
 565                 global $wgLang, $wgUser;
 566
 567                 wfProfileIn( __METHOD__ );
 568
 569                 # Section edit can come from either the form or a link
 570                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 571
 572                 if ( $request->wasPosted() ) {
 573                         # These fields need to be checked for encoding.
 574                         # Also remove trailing whitespace, but don't remove _initial_
 575                         # whitespace from the text boxes. This may be significant formatting.
 576                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 577                         $this->textbox2 = $this->safeUnicodeInput( $request, 'wpTextbox2' );
 578                         $this->mMetaData = rtrim( $request->getText( 'metadata' ) );
 579                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 580                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary' ), 250, '' );
 581
 582                         # Remove extra headings from summaries and new sections.
 583                         $this->summary = preg_replace('/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary);
 584
 585                         $this->edittime = $request->getVal( 'wpEdittime' );
 586                         $this->starttime = $request->getVal( 'wpStarttime' );
 587
 588                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 589
 590                         if ( is_null( $this->edittime ) ) {
 591                                 # If the form is incomplete, force to preview.
 592                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 593                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 594                                 $this->preview = true;
 595                         } else {
 596                                 /* Fallback for live preview */
 597                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 598                                 $this->diff = $request->getCheck( 'wpDiff' );
 599
 600                                 // Remember whether a save was requested, so we can indicate
 601                                 // if we forced preview due to session failure.
 602                                 $this->mTriedSave = !$this->preview;
 603
 604                                 if ( $this->tokenOk( $request ) ) {
 605                                         # Some browsers will not report any submit button
 606                                         # if the user hits enter in the comment box.
 607                                         # The unmarked state will be assumed to be a save,
 608                                         # if the form seems otherwise complete.
 609                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 610                                 } else if ( $this->diff ) {
 611                                         # Failed token check, but only requested "Show Changes".
 612                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 613                                 } else {
 614                                         # Page might be a hack attempt posted from
 615                                         # an external site. Preview instead of saving.
 616                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 617                                         $this->preview = true;
 618                                 }
 619                         }
 620                         $this->save = !$this->preview && !$this->diff;
 621                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 622                                 $this->edittime = null;
 623                         }
 624
 625                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 626                                 $this->starttime = null;
 627                         }
 628
 629                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 630
 631                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 632                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 633
 634                         # Don't force edit summaries when a user is editing their own user or talk page
 635                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 636                                 $this->mTitle->getText() == $wgUser->getName() )
 637                         {
 638                                 $this->allowBlankSummary = true;
 639                         } else {
 640                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary');
 641                         }
 642
 643                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 644                 } else {
 645                         # Not a posted form? Start with nothing.
 646                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 647                         $this->textbox1  = '';
 648                         $this->textbox2  = '';
 649                         $this->mMetaData = '';
 650                         $this->summary   = '';
 651                         $this->edittime  = '';
 652                         $this->starttime = wfTimestampNow();
 653                         $this->edit      = false;
 654                         $this->preview   = false;
 655                         $this->save      = false;
 656                         $this->diff      = false;
 657                         $this->minoredit = false;
 658                         $this->watchthis = false;
 659                         $this->recreate  = false;
 660
 661                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 662                                 $this->summary = $request->getVal( 'preloadtitle' );
 663                         }
 664                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 665                                 $this->summary = $request->getText( 'summary' );
 666                         }
 667
 668                         if ( $request->getVal( 'minor' ) ) {
 669                                 $this->minoredit = true;
 670                         }
 671                 }
 672
 673                 // FIXME: unused variable?
 674                 $this->oldid = $request->getInt( 'oldid' );
 675
 676                 $this->live = $request->getCheck( 'live' );
 677                 $this->editintro = $request->getText( 'editintro' );
 678
 679                 wfProfileOut( __METHOD__ );
 680
 681                 // Allow extensions to modify form data
 682                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 683         }
 684
 685         /**
 686          * Make sure the form isn't faking a user's credentials.
 687          *
 688          * @param $request WebRequest
 689          * @return bool
 690          * @private
 691          */
 692         function tokenOk( &$request ) {
 693                 global $wgUser;
 694                 $token = $request->getVal( 'wpEditToken' );
 695                 $this->mTokenOk = $wgUser->matchEditToken( $token );
 696                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
 697                 return $this->mTokenOk;
 698         }
 699
 700         /**
 701          * Show all applicable editing introductions
 702          */
 703         protected function showIntro() {
 704                 global $wgOut, $wgUser;
 705                 if ( $this->suppressIntro ) {
 706                         return;
 707                 }
 708
 709                 $namespace = $this->mTitle->getNamespace();
 710
 711                 if ( $namespace == NS_MEDIAWIKI ) {
 712                         # Show a warning if editing an interface message
 713                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1</div>", 'editinginterface' );
 714                 }
 715
 716                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exists
 717                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
 718                         $parts = explode( '/', $this->mTitle->getText(), 2 );
 719                         $username = $parts[0];
 720                         $id = User::idFromName( $username );
 721                         $ip = User::isIP( $username );
 722                         if ( $id == 0 && !$ip ) {
 723                                 $wgOut->wrapWikiMsg( '<div class="mw-userpage-userdoesnotexist error">$1</div>',
 724                                         array( 'userpage-userdoesnotexist', $username ) );
 725                         }
 726                 }
 727                 # Try to add a custom edit intro, or use the standard one if this is not possible.
 728                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
 729                         if ( $wgUser->isLoggedIn() ) {
 730                                 $wgOut->wrapWikiMsg( '<div class="mw-newarticletext">$1</div>', 'newarticletext' );
 731                         } else {
 732                                 $wgOut->wrapWikiMsg( '<div class="mw-newarticletextanon">$1</div>', 'newarticletextanon' );
 733                         }
 734                 }
 735                 # Give a notice if the user is editing a deleted/moved page...
 736                 if ( !$this->mTitle->exists() ) {
 737                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle->getPrefixedText(),
 738                                 '', array( 'lim' => 10,
 739                                            'conds' => array( "log_action != 'revision'" ),
 740                                            'showIfEmpty' => false,
 741                                            'msgKey' => array( 'recreate-moveddeleted-warn') )
 742                         );
 743                 }
 744         }
 745
 746         /**
 747          * Attempt to show a custom editing introduction, if supplied
 748          *
 749          * @return bool
 750          */
 751         protected function showCustomIntro() {
 752                 if ( $this->editintro ) {
 753                         $title = Title::newFromText( $this->editintro );
 754                         if ( $title instanceof Title && $title->exists() && $title->userCanRead() ) {
 755                                 global $wgOut;
 756                                 $revision = Revision::newFromTitle( $title );
 757                                 $wgOut->addWikiTextTitleTidy( $revision->getText(), $this->mTitle );
 758                                 return true;
 759                         } else {
 760                                 return false;
 761                         }
 762                 } else {
 763                         return false;
 764                 }
 765         }
 766
 767         /**
 768          * Attempt submission (no UI)
 769          * @return one of the constants describing the result
 770          */
 771         function internalAttemptSave( &$result, $bot = false ) {
 772                 global $wgFilterCallback, $wgUser, $wgOut, $wgParser;
 773                 global $wgMaxArticleSize;
 774
 775                 wfProfileIn( __METHOD__  );
 776                 wfProfileIn( __METHOD__ . '-checks' );
 777
 778                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) )
 779                 {
 780                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
 781                         return self::AS_HOOK_ERROR;
 782                 }
 783
 784                 # Check image redirect
 785                 if ( $this->mTitle->getNamespace() == NS_FILE &&
 786                         Title::newFromRedirect( $this->textbox1 ) instanceof Title &&
 787                         !$wgUser->isAllowed( 'upload' ) ) {
 788                                 if ( $wgUser->isAnon() ) {
 789                                         return self::AS_IMAGE_REDIRECT_ANON;
 790                                 } else {
 791                                         return self::AS_IMAGE_REDIRECT_LOGGED;
 792                                 }
 793                 }
 794
 795                 # Reintegrate metadata
 796                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 797                 $this->mMetaData = '' ;
 798
 799                 # Check for spam
 800                 $match = self::matchSummarySpamRegex( $this->summary );
 801                 if ( $match === false ) {
 802                         $match = self::matchSpamRegex( $this->textbox1 );
 803                 }
 804                 if ( $match !== false ) {
 805                         $result['spam'] = $match;
 806                         $ip = wfGetIP();
 807                         $pdbk = $this->mTitle->getPrefixedDBkey();
 808                         $match = str_replace( "\n", '', $match );
 809                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
 810                         wfProfileOut( __METHOD__ . '-checks' );
 811                         wfProfileOut( __METHOD__ );
 812                         return self::AS_SPAM_ERROR;
 813                 }
 814                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
 815                         # Error messages or other handling should be performed by the filter function
 816                         wfProfileOut( __METHOD__ . '-checks' );
 817                         wfProfileOut( __METHOD__ );
 818                         return self::AS_FILTERING;
 819                 }
 820                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
 821                         # Error messages etc. could be handled within the hook...
 822                         wfProfileOut( __METHOD__ . '-checks' );
 823                         wfProfileOut( __METHOD__ );
 824                         return self::AS_HOOK_ERROR;
 825                 } elseif ( $this->hookError != '' ) {
 826                         # ...or the hook could be expecting us to produce an error
 827                         wfProfileOut( __METHOD__ . '-checks' );
 828                         wfProfileOut( __METHOD__ );
 829                         return self::AS_HOOK_ERROR_EXPECTED;
 830                 }
 831                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 832                         # Check block state against master, thus 'false'.
 833                         wfProfileOut( __METHOD__ . '-checks' );
 834                         wfProfileOut( __METHOD__ );
 835                         return self::AS_BLOCKED_PAGE_FOR_USER;
 836                 }
 837                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
 838                 if ( $this->kblength > $wgMaxArticleSize ) {
 839                         // Error will be displayed by showEditForm()
 840                         $this->tooBig = true;
 841                         wfProfileOut( __METHOD__ . '-checks' );
 842                         wfProfileOut( __METHOD__ );
 843                         return self::AS_CONTENT_TOO_BIG;
 844                 }
 845
 846                 if ( !$wgUser->isAllowed( 'edit' ) ) {
 847                         if ( $wgUser->isAnon() ) {
 848                                 wfProfileOut( __METHOD__ . '-checks' );
 849                                 wfProfileOut( __METHOD__ );
 850                                 return self::AS_READ_ONLY_PAGE_ANON;
 851                         } else {
 852                                 wfProfileOut( __METHOD__ . '-checks' );
 853                                 wfProfileOut( __METHOD__ );
 854                                 return self::AS_READ_ONLY_PAGE_LOGGED;
 855                         }
 856                 }
 857
 858                 if ( wfReadOnly() ) {
 859                         wfProfileOut( __METHOD__ . '-checks' );
 860                         wfProfileOut( __METHOD__ );
 861                         return self::AS_READ_ONLY_PAGE;
 862                 }
 863                 if ( $wgUser->pingLimiter() ) {
 864                         wfProfileOut( __METHOD__ . '-checks' );
 865                         wfProfileOut( __METHOD__ );
 866                         return self::AS_RATE_LIMITED;
 867                 }
 868
 869                 # If the article has been deleted while editing, don't save it without
 870                 # confirmation
 871                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
 872                         wfProfileOut( __METHOD__ . '-checks' );
 873                         wfProfileOut( __METHOD__ );
 874                         return self::AS_ARTICLE_WAS_DELETED;
 875                 }
 876
 877                 wfProfileOut( __METHOD__ . '-checks' );
 878
 879                 # If article is new, insert it.
 880                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 881                 if ( 0 == $aid ) {
 882                         // Late check for create permission, just in case *PARANOIA*
 883                         if ( !$this->mTitle->userCan( 'create' ) ) {
 884                                 wfDebug( __METHOD__ . ": no create permission\n" );
 885                                 wfProfileOut( __METHOD__ );
 886                                 return self::AS_NO_CREATE_PERMISSION;
 887                         }
 888
 889                         # Don't save a new article if it's blank.
 890                         if ( '' == $this->textbox1 ) {
 891                                 wfProfileOut( __METHOD__ );
 892                                 return self::AS_BLANK_ARTICLE;
 893                         }
 894
 895                         // Run post-section-merge edit filter
 896                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
 897                                 # Error messages etc. could be handled within the hook...
 898                                 wfProfileOut( __METHOD__ );
 899                                 return self::AS_HOOK_ERROR;
 900                         } elseif ( $this->hookError != '' ) {
 901                                 # ...or the hook could be expecting us to produce an error
 902                                 wfProfileOut( __METHOD__ );
 903                                 return self::AS_HOOK_ERROR_EXPECTED;
 904                         }
 905
 906                         # Handle the user preference to force summaries here. Check if it's not a redirect.
 907                         if ( !$this->allowBlankSummary && !Title::newFromRedirect( $this->textbox1 ) ) {
 908                                 if ( md5( $this->summary ) == $this->autoSumm ) {
 909                                         $this->missingSummary = true;
 910                                         wfProfileOut( __METHOD__ );
 911                                         return self::AS_SUMMARY_NEEDED;
 912                                 }
 913                         }
 914
 915                         $isComment = ( $this->section == 'new' );
 916
 917                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 918                                 $this->minoredit, $this->watchthis, false, $isComment, $bot );
 919
 920                         wfProfileOut( __METHOD__ );
 921                         return self::AS_SUCCESS_NEW_ARTICLE;
 922                 }
 923
 924                 # Article exists. Check for edit conflict.
 925
 926                 $this->mArticle->clear(); # Force reload of dates, etc.
 927                 $this->mArticle->forUpdate( true ); # Lock the article
 928
 929                 wfDebug( "timestamp: {$this->mArticle->getTimestamp()}, edittime: {$this->edittime}\n" );
 930
 931                 if ( $this->mArticle->getTimestamp() != $this->edittime ) {
 932                         $this->isConflict = true;
 933                         if ( $this->section == 'new' ) {
 934                                 if ( $this->mArticle->getUserText() == $wgUser->getName() &&
 935                                         $this->mArticle->getComment() == $this->summary ) {
 936                                         // Probably a duplicate submission of a new comment.
 937                                         // This can happen when squid resends a request after
 938                                         // a timeout but the first one actually went through.
 939                                         wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
 940                                 } else {
 941                                         // New comment; suppress conflict.
 942                                         $this->isConflict = false;
 943                                         wfDebug( __METHOD__ .": conflict suppressed; new section\n" );
 944                                 }
 945                         }
 946                 }
 947                 $userid = $wgUser->getId();
 948
 949                 # Suppress edit conflict with self, except for section edits where merging is required.
 950                 if ( $this->isConflict && $this->section == '' && $this->userWasLastToEdit( $userid, $this->edittime ) ) {
 951                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
 952                         $this->isConflict = false;
 953                 }
 954
 955                 if ( $this->isConflict ) {
 956                         wfDebug( __METHOD__ . ": conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
 957                                 $this->mArticle->getTimestamp() . "')\n" );
 958                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime );
 959                 } else {
 960                         wfDebug( __METHOD__ . ": getting section '$this->section'\n" );
 961                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary );
 962                 }
 963                 if ( is_null( $text ) ) {
 964                         wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
 965                         $this->isConflict = true;
 966                         $text = $this->textbox1; // do not try to merge here!
 967                 } else if ( $this->isConflict ) {
 968                         # Attempt merge
 969                         if ( $this->mergeChangesInto( $text ) ) {
 970                                 // Successful merge! Maybe we should tell the user the good news?
 971                                 $this->isConflict = false;
 972                                 wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
 973                         } else {
 974                                 $this->section = '';
 975                                 $this->textbox1 = $text;
 976                                 wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
 977                         }
 978                 }
 979
 980                 if ( $this->isConflict ) {
 981                         wfProfileOut( __METHOD__ );
 982                         return self::AS_CONFLICT_DETECTED;
 983                 }
 984
 985                 $oldtext = $this->mArticle->getContent();
 986
 987                 // Run post-section-merge edit filter
 988                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$this->hookError, $this->summary ) ) ) {
 989                         # Error messages etc. could be handled within the hook...
 990                         wfProfileOut( __METHOD__ );
 991                         return self::AS_HOOK_ERROR;
 992                 } elseif ( $this->hookError != '' ) {
 993                         # ...or the hook could be expecting us to produce an error
 994                         wfProfileOut( __METHOD__ );
 995                         return self::AS_HOOK_ERROR_EXPECTED;
 996                 }
 997
 998                 # Handle the user preference to force summaries here, but not for null edits
 999                 if ( $this->section != 'new' && !$this->allowBlankSummary && 0 != strcmp( $oldtext, $text )
1000                         && !Title::newFromRedirect( $text ) ) # check if it's not a redirect
1001                 {
1002                         if ( md5( $this->summary ) == $this->autoSumm ) {
1003                                 $this->missingSummary = true;
1004                                 wfProfileOut( __METHOD__ );
1005                                 return self::AS_SUMMARY_NEEDED;
1006                         }
1007                 }
1008
1009                 # And a similar thing for new sections
1010                 if ( $this->section == 'new' && !$this->allowBlankSummary ) {
1011                         if ( trim( $this->summary ) == '' ) {
1012                                 $this->missingSummary = true;
1013                                 wfProfileOut( __METHOD__ );
1014                                 return self::AS_SUMMARY_NEEDED;
1015                         }
1016                 }
1017
1018                 # All's well
1019                 wfProfileIn( __METHOD__ . '-sectionanchor' );
1020                 $sectionanchor = '';
1021                 if ( $this->section == 'new' ) {
1022                         if ( $this->textbox1 == '' ) {
1023                                 $this->missingComment = true;
1024                                 wfProfileOut( __METHOD__ . '-sectionanchor' );
1025                                 wfProfileOut( __METHOD__ );
1026                                 return self::AS_TEXTBOX_EMPTY;
1027                         }
1028                         if ( $this->summary != '' ) {
1029                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $this->summary );
1030                                 # This is a new section, so create a link to the new section
1031                                 # in the revision summary.
1032                                 $cleanSummary = $wgParser->stripSectionName( $this->summary );
1033                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1034                         }
1035                 } elseif ( $this->section != '' ) {
1036                         # Try to get a section anchor from the section source, redirect to edited section if header found
1037                         # XXX: might be better to integrate this into Article::replaceSection
1038                         # for duplicate heading checking and maybe parsing
1039                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1040                         # we can't deal with anchors, includes, html etc in the header for now,
1041                         # headline would need to be parsed to improve this
1042                         if ( $hasmatch and strlen( $matches[2] ) > 0 ) {
1043                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $matches[2] );
1044                         }
1045                 }
1046                 wfProfileOut( __METHOD__ . '-sectionanchor' );
1047
1048                 // Save errors may fall down to the edit form, but we've now
1049                 // merged the section into full text. Clear the section field
1050                 // so that later submission of conflict forms won't try to
1051                 // replace that into a duplicated mess.
1052                 $this->textbox1 = $text;
1053                 $this->section = '';
1054
1055                 // Check for length errors again now that the section is merged in
1056                 $this->kblength = (int)( strlen( $text ) / 1024 );
1057                 if ( $this->kblength > $wgMaxArticleSize ) {
1058                         $this->tooBig = true;
1059                         wfProfileOut( __METHOD__ );
1060                         return self::AS_MAX_ARTICLE_SIZE_EXCEEDED;
1061                 }
1062
1063                 # update the article here
1064                 if ( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
1065                         $this->watchthis, $bot, $sectionanchor ) )
1066                 {
1067                         wfProfileOut( __METHOD__ );
1068                         return self::AS_SUCCESS_UPDATE;
1069                 } else {
1070                         $this->isConflict = true;
1071                 }
1072                 wfProfileOut( __METHOD__ );
1073                 return self::AS_END;
1074         }
1075
1076         /**
1077          * Check if no edits were made by other users since
1078          * the time a user started editing the page. Limit to
1079          * 50 revisions for the sake of performance.
1080          */
1081         protected function userWasLastToEdit( $id, $edittime ) {
1082                 if( !$id ) return false;
1083                 $dbw = wfGetDB( DB_MASTER );
1084                 $res = $dbw->select( 'revision',
1085                         'rev_user',
1086                         array(
1087                                 'rev_page' => $this->mArticle->getId(),
1088                                 'rev_timestamp > '.$dbw->addQuotes( $dbw->timestamp($edittime) )
1089                         ),
1090                         __METHOD__,
1091                         array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
1092                 while( $row = $res->fetchObject() ) {
1093                         if( $row->rev_user != $id ) {
1094                                 return false;
1095                         }
1096                 }
1097                 return true;
1098         }
1099
1100         /**
1101          * Check given input text against $wgSpamRegex, and return the text of the first match.
1102          * @return mixed -- matching string or false
1103          */
1104         public static function matchSpamRegex( $text ) {
1105                 global $wgSpamRegex;
1106                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1107                 $regexes = (array)$wgSpamRegex;
1108                 return self::matchSpamRegexInternal( $text, $regexes );
1109         }
1110
1111         /**
1112          * Check given input text against $wgSpamRegex, and return the text of the first match.
1113          * @return mixed -- matching string or false
1114          */
1115         public static function matchSummarySpamRegex( $text ) {
1116                 global $wgSummarySpamRegex;
1117                 $regexes = (array)$wgSummarySpamRegex;
1118                 return self::matchSpamRegexInternal( $text, $regexes );
1119         }
1120
1121         protected static function matchSpamRegexInternal( $text, $regexes ) {
1122                 foreach( $regexes as $regex ) {
1123                         $matches = array();
1124                         if( preg_match( $regex, $text, $matches ) ) {
1125                                 return $matches[0];
1126                         }
1127                 }
1128                 return false;
1129         }
1130
1131         /**
1132          * Initialise form fields in the object
1133          * Called on the first invocation, e.g. when a user clicks an edit link
1134          */
1135         function initialiseForm() {
1136                 $this->edittime = $this->mArticle->getTimestamp();
1137                 $this->textbox1 = $this->getContent( false );
1138                 if ( $this->textbox1 === false ) return false;
1139                 wfProxyCheck();
1140                 return true;
1141         }
1142
1143         function setHeaders() {
1144                 global $wgOut, $wgTitle;
1145                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1146                 if ( $this->formtype == 'preview' ) {
1147                         $wgOut->setPageTitleActionText( wfMsg( 'preview' ) );
1148                 }
1149                 if ( $this->isConflict ) {
1150                         $wgOut->setPageTitle( wfMsg( 'editconflict', $wgTitle->getPrefixedText() ) );
1151                 } elseif ( $this->section != '' ) {
1152                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1153                         $wgOut->setPageTitle( wfMsg( $msg, $wgTitle->getPrefixedText() ) );
1154                 } else {
1155                         # Use the title defined by DISPLAYTITLE magic word when present
1156                         if ( isset( $this->mParserOutput )
1157                          && ( $dt = $this->mParserOutput->getDisplayTitle() ) !== false ) {
1158                                 $title = $dt;
1159                         } else {
1160                                 $title = $wgTitle->getPrefixedText();
1161                         }
1162                         $wgOut->setPageTitle( wfMsg( 'editing', $title ) );
1163                 }
1164         }
1165
1166         /**
1167          * Send the edit form and related headers to $wgOut
1168          * @param $formCallback Optional callable that takes an OutputPage
1169          *                      parameter; will be called during form output
1170          *                      near the top, for captchas and the like.
1171          */
1172         function showEditForm( $formCallback=null ) {
1173                 global $wgOut, $wgUser, $wgLang, $wgContLang, $wgMaxArticleSize, $wgTitle, $wgRequest;
1174
1175                 # If $wgTitle is null, that means we're in API mode.
1176                 # Some hook probably called this function  without checking
1177                 # for is_null($wgTitle) first. Bail out right here so we don't
1178                 # do lots of work just to discard it right after.
1179                 if ( is_null( $wgTitle ) )
1180                         return;
1181
1182                 wfProfileIn( __METHOD__ );
1183
1184                 $sk = $wgUser->getSkin();
1185
1186                 #need to parse the preview early so that we know which templates are used,
1187                 #otherwise users with "show preview after edit box" will get a blank list
1188                 #we parse this near the beginning so that setHeaders can do the title
1189                 #setting work instead of leaving it in getPreviewText
1190                 $previewOutput = '';
1191                 if ( $this->formtype == 'preview' ) {
1192                         $previewOutput = $this->getPreviewText();
1193                 }
1194
1195                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) );
1196
1197                 $this->setHeaders();
1198
1199                 # Enabled article-related sidebar, toplinks, etc.
1200                 $wgOut->setArticleRelated( true );
1201
1202                 $cancelParams = array();
1203
1204                 if ( $this->isConflict ) {
1205                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1</div>", 'explainconflict' );
1206
1207                         $this->textbox2 = $this->textbox1;
1208                         $this->textbox1 = $this->getContent();
1209                         $this->edittime = $this->mArticle->getTimestamp();
1210                 } else {
1211                         if ( $this->section != '' && $this->section != 'new' ) {
1212                                 $matches = array();
1213                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
1214                                         preg_match( "/^(=+)(.+)\\1/mi", $this->textbox1, $matches );
1215                                         if ( !empty( $matches[2] ) ) {
1216                                                 global $wgParser;
1217                                                 $this->summary = "/* " .
1218                                                         $wgParser->stripSectionName(trim($matches[2])) .
1219                                                         " */ ";
1220                                         }
1221                                 }
1222                         }
1223
1224                         if ( $this->missingComment ) {
1225                                 $wgOut->wrapWikiMsg( '<div id="mw-missingcommenttext">$1</div>', 'missingcommenttext' );
1226                         }
1227
1228                         if ( $this->missingSummary && $this->section != 'new' ) {
1229                                 $wgOut->wrapWikiMsg( '<div id="mw-missingsummary">$1</div>', 'missingsummary' );
1230                         }
1231
1232                         if ( $this->missingSummary && $this->section == 'new' ) {
1233                                 $wgOut->wrapWikiMsg( '<div id="mw-missingcommentheader">$1</div>', 'missingcommentheader' );
1234                         }
1235
1236                         if ( $this->hookError !== '' ) {
1237                                 $wgOut->addWikiText( $this->hookError );
1238                         }
1239
1240                         if ( !$this->checkUnicodeCompliantBrowser() ) {
1241                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
1242                         }
1243                         if ( isset( $this->mArticle ) && isset( $this->mArticle->mRevision ) ) {
1244                         // Let sysop know that this will make private content public if saved
1245
1246                                 if ( !$this->mArticle->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1247                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n", 'rev-deleted-text-permission' );
1248                                 } else if ( $this->mArticle->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1249                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n", 'rev-deleted-text-view' );
1250                                 }
1251
1252                                 if ( !$this->mArticle->mRevision->isCurrent() ) {
1253                                         $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
1254                                         $cancelParams['oldid'] = $this->mArticle->mRevision->getId();
1255                                         $wgOut->addWikiMsg( 'editingold' );
1256                                 }
1257                         }
1258                 }
1259
1260                 if ( wfReadOnly() ) {
1261                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
1262                 } elseif ( $wgUser->isAnon() && $this->formtype != 'preview' ) {
1263                         $wgOut->wrapWikiMsg( '<div id="mw-anon-edit-warning">$1</div>', 'anoneditwarning' );
1264                 } else {
1265                         if ( $this->isCssJsSubpage ) {
1266                                 # Check the skin exists
1267                                 if ( !$this->isValidCssJsSubpage ) {
1268                                         $wgOut->addWikiMsg( 'userinvalidcssjstitle', $wgTitle->getSkinFromCssJsSubpage() );
1269                                 }
1270                                 if ( $this->formtype !== 'preview' ) {
1271                                         if ( $this->isCssSubpage )
1272                                                 $wgOut->addWikiMsg( 'usercssyoucanpreview' );
1273                                         if ( $this->isJsSubpage )
1274                                                 $wgOut->addWikiMsg( 'userjsyoucanpreview' );
1275                                 }
1276                         }
1277                 }
1278
1279                 $classes = array(); // Textarea CSS
1280                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1281                 } elseif ( $this->mTitle->isProtected( 'edit' ) ) {
1282                         # Is the title semi-protected?
1283                         if ( $this->mTitle->isSemiProtected() ) {
1284                                 $noticeMsg = 'semiprotectedpagewarning';
1285                                 $classes[] = 'mw-textarea-sprotected';
1286                         } else {
1287                                 # Then it must be protected based on static groups (regular)
1288                                 $noticeMsg = 'protectedpagewarning';
1289                                 $classes[] = 'mw-textarea-protected';
1290                         }
1291                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle->getPrefixedText(), '',
1292                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
1293                 }
1294                 if ( $this->mTitle->isCascadeProtected() ) {
1295                         # Is this page under cascading protection from some source pages?
1296                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
1297                         $notice = "<div class='mw-cascadeprotectedwarning'>$1\n";
1298                         $cascadeSourcesCount = count( $cascadeSources );
1299                         if ( $cascadeSourcesCount > 0 ) {
1300                                 # Explain, and list the titles responsible
1301                                 foreach( $cascadeSources as $page ) {
1302                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
1303                                 }
1304                         }
1305                         $notice .= '</div>';
1306                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
1307                 }
1308                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
1309                         $wgOut->wrapWikiMsg( '<div class="mw-titleprotectedwarning">$1</div>', 'titleprotectedwarning' );
1310                 }
1311
1312                 if ( $this->kblength === false ) {
1313                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1314                 }
1315                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
1316                         $wgOut->addHTML( "<div class='error' id='mw-edit-longpageerror'>\n" );
1317                         $wgOut->addWikiMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) );
1318                         $wgOut->addHTML( "</div>\n" );
1319                 } elseif ( $this->kblength > 29 ) {
1320                         $wgOut->addHTML( "<div id='mw-edit-longpagewarning'>\n" );
1321                         $wgOut->addWikiMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) );
1322                         $wgOut->addHTML( "</div>\n" );
1323                 }
1324
1325                 $action = $wgTitle->escapeLocalURL( array( 'action' => $this->action ) );
1326
1327                 $summary = wfMsgExt( 'summary', 'parseinline' );
1328                 $subject = wfMsgExt( 'subject', 'parseinline' );
1329
1330                 $cancel = $sk->link(
1331                         $wgTitle,
1332                         wfMsgExt( 'cancel', array( 'parseinline' ) ),
1333                         array( 'id' => 'mw-editform-cancel' ),
1334                         $cancelParams,
1335                         array( 'known', 'noclasses' )
1336                 );
1337                 $separator = wfMsgExt( 'pipe-separator' , 'escapenoentities' );
1338                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ) );
1339                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
1340                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
1341                         htmlspecialchars( wfMsg( 'newwindow' ) );
1342
1343                 global $wgRightsText;
1344                 if ( $wgRightsText ) {
1345                         $copywarnMsg = array( 'copyrightwarning',
1346                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
1347                                 $wgRightsText );
1348                 } else {
1349                         $copywarnMsg = array( 'copyrightwarning2',
1350                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
1351                 }
1352                 // Allow for site and per-namespace customization of contribution/copyright notice.
1353                 wfRunHooks( 'EditPageCopyrightWarning', array( $this->mTitle, &$copywarnMsg ) );
1354
1355                 if ( $wgUser->getOption( 'showtoolbar' ) and !$this->isCssJsSubpage ) {
1356                         # prepare toolbar for edit buttons
1357                         $toolbar = EditPage::getEditToolbar();
1358                 } else {
1359                         $toolbar = '';
1360                 }
1361
1362
1363                 // activate checkboxes if user wants them to be always active
1364                 if ( !$this->preview && !$this->diff ) {
1365                         # Sort out the "watch" checkbox
1366                         if ( $wgUser->getOption( 'watchdefault' ) ) {
1367                                 # Watch all edits
1368                                 $this->watchthis = true;
1369                         } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1370                                 # Watch creations
1371                                 $this->watchthis = true;
1372                         } elseif ( $this->mTitle->userIsWatching() ) {
1373                                 # Already watched
1374                                 $this->watchthis = true;
1375                         }
1376
1377                         # May be overriden by request parameters
1378                         if( $wgRequest->getBool( 'watchthis' ) ) {
1379                                 $this->watchthis = true;
1380                         }
1381
1382                         if ( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
1383                 }
1384
1385                 $wgOut->addHTML( $this->editFormPageTop );
1386
1387                 if ( $wgUser->getOption( 'previewontop' ) ) {
1388                         $this->displayPreviewArea( $previewOutput, true );
1389                 }
1390
1391
1392                 $wgOut->addHTML( $this->editFormTextTop );
1393
1394                 # if this is a comment, show a subject line at the top, which is also the edit summary.
1395                 # Otherwise, show a summary field at the bottom
1396                 $summarytext = $wgContLang->recodeForEdit( $this->summary );
1397
1398                 # If a blank edit summary was previously provided, and the appropriate
1399                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1400                 # user being bounced back more than once in the event that a summary
1401                 # is not required.
1402                 #####
1403                 # For a bit more sophisticated detection of blank summaries, hash the
1404                 # automatic one and pass that in the hidden field wpAutoSummary.
1405                 $summaryhiddens =  '';
1406                 if ( $this->missingSummary ) $summaryhiddens .= Xml::hidden( 'wpIgnoreBlankSummary', true );
1407                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1408                 $summaryhiddens .= Xml::hidden( 'wpAutoSummary', $autosumm );
1409                 if ( $this->section == 'new' ) {
1410                         $commentsubject = '';
1411                         if ( !$wgRequest->getBool( 'nosummary' ) ) {
1412                                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
1413                                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
1414
1415                                 $commentsubject =
1416                                         Xml::tags( 'label', array( 'for' => 'wpSummary' ), $subject );
1417                                 $commentsubject =
1418                                         Xml::tags( 'span', array( 'class' => $summaryClass, 'id' => "wpSummaryLabel" ),
1419                                                 $commentsubject );
1420                                 $commentsubject .= '&nbsp;';
1421                                 $commentsubject .= Xml::input( 'wpSummary',
1422                                                                         60,
1423                                                                         $summarytext,
1424                                                                         array(
1425                                                                                 'id' => 'wpSummary',
1426                                                                                 'maxlength' => '200',
1427                                                                                 'tabindex' => '1'
1428                                                                         ) );
1429                         } else {
1430                                 $summaryhiddens .= Xml::hidden( 'wpIgnoreBlankSummary', true ); # bug 18699
1431                         }
1432                         $editsummary = "<div class='editOptions'>\n";
1433                         global $wgParser;
1434                         $formattedSummary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $this->summary ) );
1435                         $subjectpreview = $summarytext && ( $this->preview || $this->diff ) ?
1436                                 "<div class=\"mw-summary-preview\">". wfMsgExt( 'subject-preview', 'parseinline' ) . $sk->commentBlock( $formattedSummary, $this->mTitle, true )."</div>\n" : '';
1437                         $summarypreview = '';
1438                 } else {
1439                         $commentsubject = '';
1440
1441                         # Add a class if 'missingsummary' is triggered to allow styling of the summary line
1442                         $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
1443
1444                         $editsummary = Xml::tags( 'label', array( 'for' => 'wpSummary' ), $summary );
1445                         $editsummary = Xml::tags( 'span',  array( 'class' => $summaryClass, 'id' => "wpSummaryLabel" ),
1446                                         $editsummary ) . ' ';
1447
1448                         $editsummary .= Xml::input( 'wpSummary',
1449                                 60,
1450                                 $summarytext,
1451                                 array(
1452                                         'id' => 'wpSummary',
1453                                         'maxlength' => '200',
1454                                         'tabindex' => '1'
1455                                 ) );
1456
1457                         // No idea where this is closed.
1458                         $editsummary = Xml::openElement( 'div', array( 'class' => 'editOptions' ) )
1459                                                         . $editsummary . '<br/>';
1460
1461                         $summarypreview = '';
1462                         if ( $summarytext && ( $this->preview || $this->diff ) ) {
1463                                 $summarypreview =
1464                                         Xml::tags( 'div',
1465                                                 array( 'class' => 'mw-summary-preview' ),
1466                                                 wfMsgExt( 'summary-preview', 'parseinline' ) .
1467                                                         $sk->commentBlock( $this->summary, $this->mTitle )
1468                                         );
1469                         }
1470                         $subjectpreview = '';
1471                 }
1472                 $commentsubject .= $summaryhiddens;
1473
1474                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
1475                 if ( !$this->preview && !$this->diff ) {
1476                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus()' );
1477                 }
1478                 $templates = $this->getTemplates();
1479                 $formattedtemplates = $sk->formatTemplates( $templates, $this->preview, $this->section != '');
1480
1481                 $hiddencats = $this->mArticle->getHiddenCategories();
1482                 $formattedhiddencats = $sk->formatHiddenCategories( $hiddencats );
1483
1484                 global $wgUseMetadataEdit ;
1485                 if ( $wgUseMetadataEdit ) {
1486                         $metadata = $this->mMetaData ;
1487                         $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $metadata ) ) ;
1488                         $top = wfMsgWikiHtml( 'metadata_help' );
1489                         /* ToDo: Replace with clean code */
1490                         $ew = $wgUser->getOption( 'editwidth' );
1491                         if ( $ew ) $ew = " style=\"width:100%\"";
1492                         else $ew = '';
1493                         $cols = $wgUser->getIntOption( 'cols' );
1494                         /* /ToDo */
1495                         $metadata = $top . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
1496                 }
1497                 else $metadata = "" ;
1498
1499                 $recreate = '';
1500                 if ( $this->wasDeletedSinceLastEdit() ) {
1501                         if ( 'save' != $this->formtype ) {
1502                                 $wgOut->wrapWikiMsg(
1503                                         "<div class='error mw-deleted-while-editing'>\n$1</div>",
1504                                         'deletedwhileediting' );
1505                         } else {
1506                                 // Hide the toolbar and edit area, user can click preview to get it back
1507                                 // Add an confirmation checkbox and explanation.
1508                                 $toolbar = '';
1509                                 $recreate = '<div class="mw-confirm-recreate">' .
1510                                                 $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ) ) .
1511                                                 Xml::checkLabel( wfMsg( 'recreate' ), 'wpRecreate', 'wpRecreate', false,
1512                                                         array( 'title' => $sk->titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
1513                                                 ) . '</div>';
1514                         }
1515                 }
1516
1517                 $tabindex = 2;
1518
1519                 $checkboxes = $this->getCheckboxes( $tabindex, $sk,
1520                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
1521
1522                 $checkboxhtml = implode( $checkboxes, "\n" );
1523
1524                 $buttons = $this->getEditButtons( $tabindex );
1525                 $buttonshtml = implode( $buttons, "\n" );
1526
1527                 $safemodehtml = $this->checkUnicodeCompliantBrowser()
1528                         ? '' : Xml::hidden( 'safemode', '1' );
1529
1530                 $wgOut->addHTML( <<<END
1531 {$toolbar}
1532 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1533 END
1534 );
1535
1536                 if ( is_callable( $formCallback ) ) {
1537                         call_user_func_array( $formCallback, array( &$wgOut ) );
1538                 }
1539
1540                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1541
1542                 // Put these up at the top to ensure they aren't lost on early form submission
1543                 $this->showFormBeforeText();
1544
1545                 $wgOut->addHTML( <<<END
1546 {$recreate}
1547 {$commentsubject}
1548 {$subjectpreview}
1549 {$this->editFormTextBeforeContent}
1550 END
1551 );
1552                 $this->showTextbox1( $classes );
1553
1554                 $wgOut->addHTML( $this->editFormTextAfterContent );
1555
1556                 $wgOut->wrapWikiMsg( "<div id=\"editpage-copywarn\">\n$1\n</div>", $copywarnMsg );
1557                 $wgOut->addHTML( <<<END
1558 {$this->editFormTextAfterWarn}
1559 {$metadata}
1560 {$editsummary}
1561 {$summarypreview}
1562 {$checkboxhtml}
1563 {$safemodehtml}
1564 END
1565 );
1566
1567                 $wgOut->addHTML(
1568 "<div class='editButtons'>
1569 {$buttonshtml}
1570         <span class='editHelp'>{$cancel}{$separator}{$edithelp}</span>
1571 </div><!-- editButtons -->
1572 </div><!-- editOptions -->");
1573
1574                 /**
1575                  * To make it harder for someone to slip a user a page
1576                  * which submits an edit form to the wiki without their
1577                  * knowledge, a random token is associated with the login
1578                  * session. If it's not passed back with the submission,
1579                  * we won't save the page, or render user JavaScript and
1580                  * CSS previews.
1581                  *
1582                  * For anon editors, who may not have a session, we just
1583                  * include the constant suffix to prevent editing from
1584                  * broken text-mangling proxies.
1585                  */
1586                 $token = htmlspecialchars( $wgUser->editToken() );
1587                 $wgOut->addHTML( "\n<input type='hidden' value=\"$token\" name=\"wpEditToken\" />\n" );
1588
1589                 $this->showTosSummary();
1590                 $this->showEditTools();
1591
1592                 $wgOut->addHTML( <<<END
1593 {$this->editFormTextAfterTools}
1594 <div class='templatesUsed'>
1595 {$formattedtemplates}
1596 </div>
1597 <div class='hiddencats'>
1598 {$formattedhiddencats}
1599 </div>
1600 END
1601 );
1602
1603                 if ( $this->isConflict && wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
1604                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
1605
1606                         $de = new DifferenceEngine( $this->mTitle );
1607                         $de->setText( $this->textbox2, $this->textbox1 );
1608                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1609
1610                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
1611                         $this->showTextbox2();
1612                 }
1613                 $wgOut->addHTML( $this->editFormTextBottom );
1614                 $wgOut->addHTML( "</form>\n" );
1615                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1616                         $this->displayPreviewArea( $previewOutput, false );
1617                 }
1618
1619                 wfProfileOut( __METHOD__ );
1620         }
1621
1622         protected function showFormBeforeText() {
1623                 global $wgOut;
1624                 $wgOut->addHTML( "
1625 <input type='hidden' value=\"" . htmlspecialchars( $this->section ) . "\" name=\"wpSection\" />
1626 <input type='hidden' value=\"{$this->starttime}\" name=\"wpStarttime\" />\n
1627 <input type='hidden' value=\"{$this->edittime}\" name=\"wpEdittime\" />\n
1628 <input type='hidden' value=\"{$this->scrolltop}\" name=\"wpScrolltop\" id=\"wpScrolltop\" />\n" );
1629         }
1630
1631         protected function showTextbox1( $classes ) {
1632                 $attribs = array( 'tabindex' => 1 );
1633
1634                 if ( $this->wasDeletedSinceLastEdit() )
1635                         $attribs['type'] = 'hidden';
1636                 if ( !empty( $classes ) )
1637                         $attribs['class'] = implode( ' ', $classes );
1638
1639                 $this->showTextbox( $this->textbox1, 'wpTextbox1', $attribs );
1640         }
1641
1642         protected function showTextbox2() {
1643                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6 ) );
1644         }
1645
1646         protected function showTextbox( $content, $name, $attribs = array() ) {
1647                 global $wgOut, $wgUser;
1648
1649                 $wikitext = $this->safeUnicodeOutput( $content );
1650                 if ( $wikitext !== '' ) {
1651                         // Ensure there's a newline at the end, otherwise adding lines
1652                         // is awkward.
1653                         // But don't add a newline if the ext is empty, or Firefox in XHTML
1654                         // mode will show an extra newline. A bit annoying.
1655                         $wikitext .= "\n";
1656                 }
1657
1658                 $attribs['accesskey'] = ',';
1659                 $attribs['id'] = $name;
1660
1661                 if ( $wgUser->getOption( 'editwidth' ) )
1662                         $attribs['style'] = 'width: 100%';
1663
1664                 $wgOut->addHTML( Xml::textarea(
1665                         $name,
1666                         $wikitext,
1667                         $wgUser->getIntOption( 'cols' ), $wgUser->getIntOption( 'rows' ),
1668                         $attribs ) );
1669         }
1670
1671         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
1672                 global $wgOut;
1673                 $classes = array();
1674                 if ( $isOnTop )
1675                         $classes[] = 'ontop';
1676
1677                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
1678
1679                 if ( $this->formtype != 'preview' )
1680                         $attribs['style'] = 'display: none;';
1681
1682                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
1683
1684                 if ( $this->formtype == 'preview' ) {
1685                         $this->showPreview( $previewOutput );
1686                 }
1687
1688                 $wgOut->addHTML( '</div>' );
1689
1690                 if ( $this->formtype == 'diff') {
1691                         $this->showDiff();
1692                 }
1693         }
1694
1695         /**
1696          * Append preview output to $wgOut.
1697          * Includes category rendering if this is a category page.
1698          *
1699          * @param string $text The HTML to be output for the preview.
1700          */
1701         protected function showPreview( $text ) {
1702                 global $wgOut;
1703                 if ( $this->mTitle->getNamespace() == NS_CATEGORY) {
1704                         $this->mArticle->openShowCategory();
1705                 }
1706                 # This hook seems slightly odd here, but makes things more
1707                 # consistent for extensions.
1708                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
1709                 $wgOut->addHTML( $text );
1710                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
1711                         $this->mArticle->closeShowCategory();
1712                 }
1713         }
1714
1715         /**
1716          * Live Preview lets us fetch rendered preview page content and
1717          * add it to the page without refreshing the whole page.
1718          * If not supported by the browser it will fall through to the normal form
1719          * submission method.
1720          *
1721          * This function outputs a script tag to support live preview, and
1722          * returns an onclick handler which should be added to the attributes
1723          * of the preview button
1724          */
1725         function doLivePreviewScript() {
1726                 global $wgOut, $wgTitle;
1727                 $wgOut->addScriptFile( 'preview.js' );
1728                 return "";
1729         }
1730
1731         protected function showTosSummary() {
1732                 $msg = 'editpage-tos-summary';
1733                 // Give a chance for site and per-namespace customizations of
1734                 // terms of service summary link that might exist separately
1735                 // from the copyright notice.
1736                 //
1737                 // This will display between the save button and the edit tools,
1738                 // so should remain short!
1739                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
1740                 $text = wfMsg( $msg );
1741                 if( !wfEmptyMsg( $msg, $text ) && $text !== '-' ) {
1742                         global $wgOut;
1743                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
1744                         $wgOut->addWikiMsgArray( $msg, array() );
1745                         $wgOut->addHTML( '</div>' );
1746                 }
1747         }
1748
1749         protected function showEditTools() {
1750                 global $wgOut;
1751                 $wgOut->addHTML( '<div class="mw-editTools">' );
1752                 $wgOut->addWikiMsgArray( 'edittools', array(), array( 'content' ) );
1753                 $wgOut->addHTML( '</div>' );
1754         }
1755
1756         protected function getLastDelete() {
1757                 $dbr = wfGetDB( DB_SLAVE );
1758                 $data = $dbr->selectRow(
1759                         array( 'logging', 'user' ),
1760                         array( 'log_type',
1761                                'log_action',
1762                                'log_timestamp',
1763                                'log_user',
1764                                'log_namespace',
1765                                'log_title',
1766                                'log_comment',
1767                                'log_params',
1768                                'log_deleted',
1769                                'user_name' ),
1770                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1771                                'log_title' => $this->mTitle->getDBkey(),
1772                                'log_type' => 'delete',
1773                                'log_action' => 'delete',
1774                                'user_id=log_user' ),
1775                         __METHOD__,
1776                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
1777                 );
1778                 // Quick paranoid permission checks...
1779                 if( is_object( $data ) ) {
1780                         if( $data->log_deleted & LogPage::DELETED_USER )
1781                                 $data->user_name = wfMsgHtml( 'rev-deleted-user' );
1782                         if( $data->log_deleted & LogPage::DELETED_COMMENT )
1783                                 $data->log_comment = wfMsgHtml( 'rev-deleted-comment' );
1784                 }
1785                 return $data;
1786         }
1787
1788         /**
1789          * Get the rendered text for previewing.
1790          * @return string
1791          */
1792         function getPreviewText() {
1793                 global $wgOut, $wgUser, $wgTitle, $wgParser, $wgLang, $wgContLang, $wgMessageCache;
1794
1795                 wfProfileIn( __METHOD__ );
1796
1797                 if ( $this->mTriedSave && !$this->mTokenOk ) {
1798                         if ( $this->mTokenOkExceptSuffix ) {
1799                                 $note = wfMsg( 'token_suffix_mismatch' );
1800                         } else {
1801                                 $note = wfMsg( 'session_fail_preview' );
1802                         }
1803                 } else {
1804                         $note = wfMsg( 'previewnote' );
1805                 }
1806
1807                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1808                 $parserOptions->setEditSection( false );
1809                 $parserOptions->setIsPreview( true );
1810                 $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
1811
1812                 global $wgRawHtml;
1813                 if ( $wgRawHtml && !$this->mTokenOk ) {
1814                         // Could be an offsite preview attempt. This is very unsafe if
1815                         // HTML is enabled, as it could be an attack.
1816                         return $wgOut->parse( "<div class='previewnote'>" .
1817                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1818                 }
1819
1820                 # don't parse user css/js, show message about preview
1821                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1822
1823                 if ( $this->isCssJsSubpage ) {
1824                         if (preg_match( "/\\.css$/", $this->mTitle->getText() ) ) {
1825                                 $previewtext = wfMsg( 'usercsspreview' );
1826                         } else if (preg_match( "/\\.js$/", $this->mTitle->getText() ) ) {
1827                                 $previewtext = wfMsg( 'userjspreview' );
1828                         }
1829                         $parserOptions->setTidy( true );
1830                         $parserOutput = $wgParser->parse( $previewtext, $this->mTitle, $parserOptions );
1831                         $previewHTML = $parserOutput->mText;
1832                 } elseif ( $rt = Title::newFromRedirectArray( $this->textbox1 ) ) {
1833                         $previewHTML = $this->mArticle->viewRedirect( $rt, false );
1834                 } else {
1835                         $toparse = $this->textbox1;
1836
1837                         # If we're adding a comment, we need to show the
1838                         # summary as the headline
1839                         if ( $this->section == "new" && $this->summary != "" ) {
1840                                 $toparse="== {$this->summary} ==\n\n" . $toparse;
1841                         }
1842
1843                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData;
1844
1845                         // Parse mediawiki messages with correct target language
1846                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1847                                 list( /* $unused */, $lang ) = $wgMessageCache->figureMessage( $this->mTitle->getText() );
1848                                 $obj = wfGetLangObj( $lang );
1849                                 $parserOptions->setTargetLanguage( $obj );
1850                         }
1851
1852
1853                         $parserOptions->setTidy( true );
1854                         $parserOptions->enableLimitReport();
1855                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ),
1856                                         $this->mTitle, $parserOptions );
1857
1858                         $previewHTML = $parserOutput->getText();
1859                         $this->mParserOutput = $parserOutput;
1860                         $wgOut->addParserOutputNoText( $parserOutput );
1861
1862                         if ( count( $parserOutput->getWarnings() ) ) {
1863                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
1864                         }
1865                 }
1866
1867                 if( $this->isConflict ) {
1868                         $conflict = '<h2 id="mw-previewconflict">' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1869                 } else {
1870                         $conflict = '<hr />';
1871                 }
1872
1873                 $previewhead = "<div class='previewnote'>\n" .
1874                         '<h2 id="mw-previewheader">' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>" .
1875                         $wgOut->parse( $note ) . $conflict . "</div>\n";
1876
1877                 wfProfileOut( __METHOD__ );
1878                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
1879         }
1880
1881         function getTemplates() {
1882                 if ( $this->preview || $this->section != '' ) {
1883                         $templates = array();
1884                         if ( !isset( $this->mParserOutput ) ) return $templates;
1885                         foreach( $this->mParserOutput->getTemplates() as $ns => $template) {
1886                                 foreach( array_keys( $template ) as $dbk ) {
1887                                         $templates[] = Title::makeTitle($ns, $dbk);
1888                                 }
1889                         }
1890                         return $templates;
1891                 } else {
1892                         return $this->mArticle->getUsedTemplates();
1893                 }
1894         }
1895
1896         /**
1897          * Call the stock "user is blocked" page
1898          */
1899         function blockedPage() {
1900                 global $wgOut, $wgUser;
1901                 $wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
1902
1903                 # If the user made changes, preserve them when showing the markup
1904                 # (This happens when a user is blocked during edit, for instance)
1905                 $first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
1906                 if ( $first ) {
1907                         $source = $this->mTitle->exists() ? $this->getContent() : false;
1908                 } else {
1909                         $source = $this->textbox1;
1910                 }
1911
1912                 # Spit out the source or the user's modified version
1913                 if ( $source !== false ) {
1914                         $rows = $wgUser->getIntOption( 'rows' );
1915                         $cols = $wgUser->getIntOption( 'cols' );
1916                         $attribs = array( 'id' => 'wpTextbox1', 'name' => 'wpTextbox1', 'cols' => $cols, 'rows' => $rows, 'readonly' => 'readonly' );
1917                         $wgOut->addHTML( '<hr />' );
1918                         $wgOut->addWikiMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() );
1919                         # Why we don't use Xml::element here?
1920                         # Is it because if $source is '', it returns <textarea />?
1921                         $wgOut->addHTML( Xml::openElement( 'textarea', $attribs ) . htmlspecialchars( $source ) . Xml::closeElement( 'textarea' ) );
1922                 }
1923         }
1924
1925         /**
1926          * Produce the stock "please login to edit pages" page
1927          */
1928         function userNotLoggedInPage() {
1929                 global $wgUser, $wgOut, $wgTitle;
1930                 $skin = $wgUser->getSkin();
1931
1932                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1933                 $loginLink = $skin->link(
1934                         $loginTitle,
1935                         wfMsgHtml( 'loginreqlink' ),
1936                         array(),
1937                         array( 'returnto' => $wgTitle->getPrefixedText() ),
1938                         array( 'known', 'noclasses' )
1939                 );
1940
1941                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
1942                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1943                 $wgOut->setArticleRelated( false );
1944
1945                 $wgOut->addHTML( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
1946                 $wgOut->returnToMain( false, $wgTitle );
1947         }
1948
1949         /**
1950          * Creates a basic error page which informs the user that
1951          * they have attempted to edit a nonexistent section.
1952          */
1953         function noSuchSectionPage() {
1954                 global $wgOut, $wgTitle;
1955
1956                 $wgOut->setPageTitle( wfMsg( 'nosuchsectiontitle' ) );
1957                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1958                 $wgOut->setArticleRelated( false );
1959
1960                 $wgOut->addWikiMsg( 'nosuchsectiontext', $this->section );
1961                 $wgOut->returnToMain( false, $wgTitle );
1962         }
1963
1964         /**
1965          * Produce the stock "your edit contains spam" page
1966          *
1967          * @param $match Text which triggered one or more filters
1968          */
1969         function spamPage( $match = false ) {
1970                 global $wgOut, $wgTitle;
1971
1972                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
1973                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1974                 $wgOut->setArticleRelated( false );
1975
1976                 $wgOut->addHTML( '<div id="spamprotected">' );
1977                 $wgOut->addWikiMsg( 'spamprotectiontext' );
1978                 if ( $match )
1979                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
1980                 $wgOut->addHTML( '</div>' );
1981
1982                 $wgOut->returnToMain( false, $wgTitle );
1983         }
1984
1985         /**
1986          * @private
1987          * @todo document
1988          */
1989         function mergeChangesInto( &$editText ){
1990                 wfProfileIn( __METHOD__ );
1991
1992                 $db = wfGetDB( DB_MASTER );
1993
1994                 // This is the revision the editor started from
1995                 $baseRevision = $this->getBaseRevision();
1996                 if ( is_null( $baseRevision ) ) {
1997                         wfProfileOut( __METHOD__ );
1998                         return false;
1999                 }
2000                 $baseText = $baseRevision->getText();
2001
2002                 // The current state, we want to merge updates into it
2003                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2004                 if ( is_null( $currentRevision ) ) {
2005                         wfProfileOut( __METHOD__ );
2006                         return false;
2007                 }
2008                 $currentText = $currentRevision->getText();
2009
2010                 $result = '';
2011                 if ( wfMerge( $baseText, $editText, $currentText, $result ) ) {
2012                         $editText = $result;
2013                         wfProfileOut( __METHOD__ );
2014                         return true;
2015                 } else {
2016                         wfProfileOut( __METHOD__ );
2017                         return false;
2018                 }
2019         }
2020
2021         /**
2022          * Check if the browser is on a blacklist of user-agents known to
2023          * mangle UTF-8 data on form submission. Returns true if Unicode
2024          * should make it through, false if it's known to be a problem.
2025          * @return bool
2026          * @private
2027          */
2028         function checkUnicodeCompliantBrowser() {
2029                 global $wgBrowserBlackList;
2030                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
2031                         // No User-Agent header sent? Trust it by default...
2032                         return true;
2033                 }
2034                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
2035                 foreach ( $wgBrowserBlackList as $browser ) {
2036                         if ( preg_match($browser, $currentbrowser) ) {
2037                                 return false;
2038                         }
2039                 }
2040                 return true;
2041         }
2042
2043         /**
2044          * @deprecated use $wgParser->stripSectionName()
2045          */
2046         function pseudoParseSectionAnchor( $text ) {
2047                 global $wgParser;
2048                 return $wgParser->stripSectionName( $text );
2049         }
2050
2051         /**
2052          * Format an anchor fragment as it would appear for a given section name
2053          * @param string $text
2054          * @return string
2055          * @private
2056          */
2057         function sectionAnchor( $text ) {
2058                 global $wgParser;
2059                 return $wgParser->guessSectionNameFromWikiText( $text );
2060         }
2061
2062         /**
2063          * Shows a bulletin board style toolbar for common editing functions.
2064          * It can be disabled in the user preferences.
2065          * The necessary JavaScript code can be found in skins/common/edit.js.
2066          *
2067          * @return string
2068          */
2069         static function getEditToolbar() {
2070                 global $wgStylePath, $wgContLang, $wgLang;
2071
2072                 /**
2073                  * toolarray an array of arrays which each include the filename of
2074                  * the button image (without path), the opening tag, the closing tag,
2075                  * and optionally a sample text that is inserted between the two when no
2076                  * selection is highlighted.
2077                  * The tip text is shown when the user moves the mouse over the button.
2078                  *
2079                  * Already here are accesskeys (key), which are not used yet until someone
2080                  * can figure out a way to make them work in IE. However, we should make
2081                  * sure these keys are not defined on the edit page.
2082                  */
2083                 $toolarray = array(
2084                         array(
2085                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
2086                                 'id'     => 'mw-editbutton-bold',
2087                                 'open'   => '\'\'\'',
2088                                 'close'  => '\'\'\'',
2089                                 'sample' => wfMsg( 'bold_sample' ),
2090                                 'tip'    => wfMsg( 'bold_tip' ),
2091                                 'key'    => 'B'
2092                         ),
2093                         array(
2094                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
2095                                 'id'     => 'mw-editbutton-italic',
2096                                 'open'   => '\'\'',
2097                                 'close'  => '\'\'',
2098                                 'sample' => wfMsg( 'italic_sample' ),
2099                                 'tip'    => wfMsg( 'italic_tip' ),
2100                                 'key'    => 'I'
2101                         ),
2102                         array(
2103                                 'image'  => $wgLang->getImageFile( 'button-link' ),
2104                                 'id'     => 'mw-editbutton-link',
2105                                 'open'   => '[[',
2106                                 'close'  => ']]',
2107                                 'sample' => wfMsg( 'link_sample' ),
2108                                 'tip'    => wfMsg( 'link_tip' ),
2109                                 'key'    => 'L'
2110                         ),
2111                         array(
2112                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
2113                                 'id'     => 'mw-editbutton-extlink',
2114                                 'open'   => '[',
2115                                 'close'  => ']',
2116                                 'sample' => wfMsg( 'extlink_sample' ),
2117                                 'tip'    => wfMsg( 'extlink_tip' ),
2118                                 'key'    => 'X'
2119                         ),
2120                         array(
2121                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
2122                                 'id'     => 'mw-editbutton-headline',
2123                                 'open'   => "\n== ",
2124                                 'close'  => " ==\n",
2125                                 'sample' => wfMsg( 'headline_sample' ),
2126                                 'tip'    => wfMsg( 'headline_tip' ),
2127                                 'key'    => 'H'
2128                         ),
2129                         array(
2130                                 'image'  => $wgLang->getImageFile( 'button-image' ),
2131                                 'id'     => 'mw-editbutton-image',
2132                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
2133                                 'close'  => ']]',
2134                                 'sample' => wfMsg( 'image_sample' ),
2135                                 'tip'    => wfMsg( 'image_tip' ),
2136                                 'key'    => 'D'
2137                         ),
2138                         array(
2139                                 'image'  => $wgLang->getImageFile( 'button-media' ),
2140                                 'id'     => 'mw-editbutton-media',
2141                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
2142                                 'close'  => ']]',
2143                                 'sample' => wfMsg( 'media_sample' ),
2144                                 'tip'    => wfMsg( 'media_tip' ),
2145                                 'key'    => 'M'
2146                         ),
2147                         array(
2148                                 'image'  => $wgLang->getImageFile( 'button-math' ),
2149                                 'id'     => 'mw-editbutton-math',
2150                                 'open'   => "<math>",
2151                                 'close'  => "</math>",
2152                                 'sample' => wfMsg( 'math_sample' ),
2153                                 'tip'    => wfMsg( 'math_tip' ),
2154                                 'key'    => 'C'
2155                         ),
2156                         array(
2157                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
2158                                 'id'     => 'mw-editbutton-nowiki',
2159                                 'open'   => "<nowiki>",
2160                                 'close'  => "</nowiki>",
2161                                 'sample' => wfMsg( 'nowiki_sample' ),
2162                                 'tip'    => wfMsg( 'nowiki_tip' ),
2163                                 'key'    => 'N'
2164                         ),
2165                         array(
2166                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
2167                                 'id'     => 'mw-editbutton-signature',
2168                                 'open'   => '--~~~~',
2169                                 'close'  => '',
2170                                 'sample' => '',
2171                                 'tip'    => wfMsg( 'sig_tip' ),
2172                                 'key'    => 'Y'
2173                         ),
2174                         array(
2175                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
2176                                 'id'     => 'mw-editbutton-hr',
2177                                 'open'   => "\n----\n",
2178                                 'close'  => '',
2179                                 'sample' => '',
2180                                 'tip'    => wfMsg( 'hr_tip' ),
2181                                 'key'    => 'R'
2182                         )
2183                 );
2184                 $toolbar = "<div id='toolbar'>\n";
2185
2186                 $script = '';
2187                 foreach ( $toolarray as $tool ) {
2188                         $params = array(
2189                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
2190                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
2191                                 // Older browsers show a "speedtip" type message only for ALT.
2192                                 // Ideally these should be different, realistically they
2193                                 // probably don't need to be.
2194                                 $tip = $tool['tip'],
2195                                 $open = $tool['open'],
2196                                 $close = $tool['close'],
2197                                 $sample = $tool['sample'],
2198                                 $cssId = $tool['id'],
2199                         );
2200
2201                         $paramList = implode( ',',
2202                                 array_map( array( 'Xml', 'encodeJsVar' ), $params ) );
2203                         $script .= "addButton($paramList);\n";
2204                 }
2205                 $toolbar .= Html::inlineScript( "\n$script\n" );
2206
2207                 $toolbar .= "\n</div>";
2208
2209                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
2210
2211                 return $toolbar;
2212         }
2213
2214         /**
2215          * Returns an array of html code of the following checkboxes:
2216          * minor and watch
2217          *
2218          * @param $tabindex Current tabindex
2219          * @param $skin Skin object
2220          * @param $checked Array of checkbox => bool, where bool indicates the checked
2221          *                 status of the checkbox
2222          *
2223          * @return array
2224          */
2225         public function getCheckboxes( &$tabindex, $skin, $checked ) {
2226                 global $wgUser;
2227
2228                 $checkboxes = array();
2229
2230                 $checkboxes['minor'] = '';
2231                 $minorLabel = wfMsgExt( 'minoredit', array( 'parseinline' ) );
2232                 if ( $wgUser->isAllowed( 'minoredit' ) ) {
2233                         $attribs = array(
2234                                 'tabindex'  => ++$tabindex,
2235                                 'accesskey' => wfMsg( 'accesskey-minoredit' ),
2236                                 'id'        => 'wpMinoredit',
2237                         );
2238                         $checkboxes['minor'] =
2239                                 Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
2240                                 "&nbsp;<label for='wpMinoredit'" . $skin->tooltip( 'minoredit', 'withaccess' ) . ">{$minorLabel}</label>";
2241                 }
2242
2243                 $watchLabel = wfMsgExt( 'watchthis', array( 'parseinline' ) );
2244                 $checkboxes['watch'] = '';
2245                 if ( $wgUser->isLoggedIn() ) {
2246                         $attribs = array(
2247                                 'tabindex'  => ++$tabindex,
2248                                 'accesskey' => wfMsg( 'accesskey-watch' ),
2249                                 'id'        => 'wpWatchthis',
2250                         );
2251                         $checkboxes['watch'] =
2252                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
2253                                 "&nbsp;<label for='wpWatchthis'" . $skin->tooltip( 'watch', 'withaccess' ) . ">{$watchLabel}</label>";
2254                 }
2255                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
2256                 return $checkboxes;
2257         }
2258
2259         /**
2260          * Returns an array of html code of the following buttons:
2261          * save, diff, preview and live
2262          *
2263          * @param $tabindex Current tabindex
2264          *
2265          * @return array
2266          */
2267         public function getEditButtons(&$tabindex) {
2268                 $buttons = array();
2269
2270                 $temp = array(
2271                         'id'        => 'wpSave',
2272                         'name'      => 'wpSave',
2273                         'type'      => 'submit',
2274                         'tabindex'  => ++$tabindex,
2275                         'value'     => wfMsg( 'savearticle' ),
2276                         'accesskey' => wfMsg( 'accesskey-save' ),
2277                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
2278                 );
2279                 $buttons['save'] = Xml::element('input', $temp, '');
2280
2281                 ++$tabindex; // use the same for preview and live preview
2282                 if ( $this->useLivePreview() ) {
2283                         $this->doLivePreviewScript(); // Add to output
2284
2285                         $temp = array(
2286                                 'id'        => 'wpPreview',
2287                                 'name'      => 'wpPreview',
2288                                 'type'      => 'submit',
2289                                 'tabindex'  => $tabindex,
2290                                 'value'     => wfMsg( 'showpreview' ),
2291                                 'accesskey' => '',
2292                                 'title'     => wfMsg( 'tooltip-preview' ).' ['.wfMsg( 'accesskey-preview' ).']',
2293                         );
2294                         $buttons['preview'] = Xml::element('input', $temp, '');
2295
2296                         $temp = array(
2297                                 'id'        => 'wpLivePreview',
2298                                 'name'      => 'wpLivePreview',
2299                                 'type'      => 'submit',
2300                                 'tabindex'  => $tabindex,
2301                                 'value'     => wfMsg( 'showlivepreview' ),
2302                                 'accesskey' => wfMsg( 'accesskey-preview' ),
2303                                 'title'     => '',
2304                                 'style'     => 'display: none;',
2305                         );
2306
2307                         $buttons['live'] = Xml::element( 'input', $temp, '' );
2308                 } else {
2309                         $temp = array(
2310                                 'id'        => 'wpPreview',
2311                                 'name'      => 'wpPreview',
2312                                 'type'      => 'submit',
2313                                 'tabindex'  => $tabindex,
2314                                 'value'     => wfMsg( 'showpreview' ),
2315                                 'accesskey' => wfMsg( 'accesskey-preview' ),
2316                                 'title'     => wfMsg( 'tooltip-preview' ) . ' [' . wfMsg( 'accesskey-preview' ) . ']',
2317                         );
2318                         $buttons['preview'] = Xml::element( 'input', $temp, '' );
2319                         $buttons['live'] = '';
2320                 }
2321
2322                 $temp = array(
2323                         'id'        => 'wpDiff',
2324                         'name'      => 'wpDiff',
2325                         'type'      => 'submit',
2326                         'tabindex'  => ++$tabindex,
2327                         'value'     => wfMsg( 'showdiff' ),
2328                         'accesskey' => wfMsg( 'accesskey-diff' ),
2329                         'title'     => wfMsg( 'tooltip-diff' ) . ' [' . wfMsg( 'accesskey-diff' ) . ']',
2330                 );
2331                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
2332
2333                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
2334                 return $buttons;
2335         }
2336
2337         /**
2338          * Whether to use live preview for this page
2339          * This disables live preview when editing css/js user subpages so that the
2340          * user can preview them (bug 3421)
2341          *
2342          * @return Boolean
2343          */
2344         public function useLivePreview() {
2345                 global $wgLivePreview, $wgUser;
2346
2347                 return $wgLivePreview && $wgUser->getOption( 'uselivepreview' ) &&
2348                         !( ( $this->mTitle->isCssSubpage() && $this->mTitle->userCanEditCssSubpage() ) ||
2349                         ( $this->mTitle->isJsSubpage() && $this->mTitle->userCanEditCssSubpage() ) );
2350         }
2351
2352         /**
2353          * Output preview text only. This can be sucked into the edit page
2354          * via JavaScript, and saves the server time rendering the skin as
2355          * well as theoretically being more robust on the client (doesn't
2356          * disturb the edit box's undo history, won't eat your text on
2357          * failure, etc).
2358          *
2359          * @todo This doesn't include category or interlanguage links.
2360          *       Would need to enhance it a bit, <s>maybe wrap them in XML
2361          *       or something...</s> that might also require more skin
2362          *       initialization, so check whether that's a problem.
2363          */
2364         function livePreview() {
2365                 global $wgOut;
2366                 $wgOut->disable();
2367                 header( 'Content-type: text/xml; charset=utf-8' );
2368                 header( 'Cache-control: no-cache' );
2369
2370                 $previewText = $this->getPreviewText();
2371                 #$categories = $skin->getCategoryLinks();
2372
2373                 $s =
2374                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
2375                 Xml::tags( 'livepreview', null,
2376                         Xml::element( 'preview', null, $previewText )
2377                         #.      Xml::element( 'category', null, $categories )
2378                 );
2379                 echo $s;
2380         }
2381
2382
2383         /**
2384          * Get a diff between the current contents of the edit box and the
2385          * version of the page we're editing from.
2386          *
2387          * If this is a section edit, we'll replace the section as for final
2388          * save and then make a comparison.
2389          */
2390         function showDiff() {
2391                 $oldtext = $this->mArticle->fetchContent();
2392                 $newtext = $this->mArticle->replaceSection(
2393                         $this->section, $this->textbox1, $this->summary, $this->edittime );
2394                 $newtext = $this->mArticle->preSaveTransform( $newtext );
2395                 $oldtitle = wfMsgExt( 'currentrev', array( 'parseinline' ) );
2396                 $newtitle = wfMsgExt( 'yourtext', array( 'parseinline' ) );
2397                 if ( $oldtext !== false  || $newtext != '' ) {
2398                         $de = new DifferenceEngine( $this->mTitle );
2399                         $de->setText( $oldtext, $newtext );
2400                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2401                         $de->showDiffStyle();
2402                 } else {
2403                         $difftext = '';
2404                 }
2405
2406                 global $wgOut;
2407                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2408         }
2409
2410         /**
2411          * Filter an input field through a Unicode de-armoring process if it
2412          * came from an old browser with known broken Unicode editing issues.
2413          *
2414          * @param WebRequest $request
2415          * @param string $field
2416          * @return string
2417          * @private
2418          */
2419         function safeUnicodeInput( $request, $field ) {
2420                 $text = rtrim( $request->getText( $field ) );
2421                 return $request->getBool( 'safemode' )
2422                         ? $this->unmakesafe( $text )
2423                         : $text;
2424         }
2425
2426         /**
2427          * Filter an output field through a Unicode armoring process if it is
2428          * going to an old browser with known broken Unicode editing issues.
2429          *
2430          * @param string $text
2431          * @return string
2432          * @private
2433          */
2434         function safeUnicodeOutput( $text ) {
2435                 global $wgContLang;
2436                 $codedText = $wgContLang->recodeForEdit( $text );
2437                 return $this->checkUnicodeCompliantBrowser()
2438                         ? $codedText
2439                         : $this->makesafe( $codedText );
2440         }
2441
2442         /**
2443          * A number of web browsers are known to corrupt non-ASCII characters
2444          * in a UTF-8 text editing environment. To protect against this,
2445          * detected browsers will be served an armored version of the text,
2446          * with non-ASCII chars converted to numeric HTML character references.
2447          *
2448          * Preexisting such character references will have a 0 added to them
2449          * to ensure that round-trips do not alter the original data.
2450          *
2451          * @param string $invalue
2452          * @return string
2453          * @private
2454          */
2455         function makesafe( $invalue ) {
2456                 // Armor existing references for reversability.
2457                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
2458
2459                 $bytesleft = 0;
2460                 $result = "";
2461                 $working = 0;
2462                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2463                         $bytevalue = ord( $invalue{$i} );
2464                         if ( $bytevalue <= 0x7F ) { //0xxx xxxx
2465                                 $result .= chr( $bytevalue );
2466                                 $bytesleft = 0;
2467                         } elseif ( $bytevalue <= 0xBF ) { //10xx xxxx
2468                                 $working = $working << 6;
2469                                 $working += ($bytevalue & 0x3F);
2470                                 $bytesleft--;
2471                                 if ( $bytesleft <= 0 ) {
2472                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
2473                                 }
2474                         } elseif ( $bytevalue <= 0xDF ) { //110x xxxx
2475                                 $working = $bytevalue & 0x1F;
2476                                 $bytesleft = 1;
2477                         } elseif ( $bytevalue <= 0xEF ) { //1110 xxxx
2478                                 $working = $bytevalue & 0x0F;
2479                                 $bytesleft = 2;
2480                         } else { //1111 0xxx
2481                                 $working = $bytevalue & 0x07;
2482                                 $bytesleft = 3;
2483                         }
2484                 }
2485                 return $result;
2486         }
2487
2488         /**
2489          * Reverse the previously applied transliteration of non-ASCII characters
2490          * back to UTF-8. Used to protect data from corruption by broken web browsers
2491          * as listed in $wgBrowserBlackList.
2492          *
2493          * @param string $invalue
2494          * @return string
2495          * @private
2496          */
2497         function unmakesafe( $invalue ) {
2498                 $result = "";
2499                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2500                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
2501                                 $i += 3;
2502                                 $hexstring = "";
2503                                 do {
2504                                         $hexstring .= $invalue{$i};
2505                                         $i++;
2506                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
2507
2508                                 // Do some sanity checks. These aren't needed for reversability,
2509                                 // but should help keep the breakage down if the editor
2510                                 // breaks one of the entities whilst editing.
2511                                 if ( (substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6) ) {
2512                                         $codepoint = hexdec($hexstring);
2513                                         $result .= codepointToUtf8( $codepoint );
2514                                 } else {
2515                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
2516                                 }
2517                         } else {
2518                                 $result .= substr( $invalue, $i, 1 );
2519                         }
2520                 }
2521                 // reverse the transform that we made for reversability reasons.
2522                 return strtr( $result, array( "&#x0" => "&#x" ) );
2523         }
2524
2525         function noCreatePermission() {
2526                 global $wgOut;
2527                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
2528                 $wgOut->addWikiMsg( 'nocreatetext' );
2529         }
2530
2531         /**
2532          * Attempt submission
2533          * @return bool false if output is done, true if the rest of the form should be displayed
2534          */
2535         function attemptSave() {
2536                 global $wgUser, $wgOut, $wgTitle, $wgRequest;
2537
2538                 $resultDetails = false;
2539                 # Allow bots to exempt some edits from bot flagging
2540                 $bot = $wgUser->isAllowed( 'bot' ) && $wgRequest->getBool( 'bot', true );
2541                 $value = $this->internalAttemptSave( $resultDetails, $bot );
2542
2543                 if ( $value == self::AS_SUCCESS_UPDATE || $value == self::AS_SUCCESS_NEW_ARTICLE ) {
2544                         $this->didSave = true;
2545                 }
2546
2547                 switch ( $value ) {
2548                         case self::AS_HOOK_ERROR_EXPECTED:
2549                         case self::AS_CONTENT_TOO_BIG:
2550                         case self::AS_ARTICLE_WAS_DELETED:
2551                         case self::AS_CONFLICT_DETECTED:
2552                         case self::AS_SUMMARY_NEEDED:
2553                         case self::AS_TEXTBOX_EMPTY:
2554                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
2555                         case self::AS_END:
2556                                 return true;
2557
2558                         case self::AS_HOOK_ERROR:
2559                         case self::AS_FILTERING:
2560                         case self::AS_SUCCESS_NEW_ARTICLE:
2561                         case self::AS_SUCCESS_UPDATE:
2562                                 return false;
2563
2564                         case self::AS_SPAM_ERROR:
2565                                 $this->spamPage( $resultDetails['spam'] );
2566                                 return false;
2567
2568                         case self::AS_BLOCKED_PAGE_FOR_USER:
2569                                 $this->blockedPage();
2570                                 return false;
2571
2572                         case self::AS_IMAGE_REDIRECT_ANON:
2573                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
2574                                 return false;
2575
2576                         case self::AS_READ_ONLY_PAGE_ANON:
2577                                 $this->userNotLoggedInPage();
2578                                 return false;
2579
2580                         case self::AS_READ_ONLY_PAGE_LOGGED:
2581                         case self::AS_READ_ONLY_PAGE:
2582                                 $wgOut->readOnlyPage();
2583                                 return false;
2584
2585                         case self::AS_RATE_LIMITED:
2586                                 $wgOut->rateLimited();
2587                                 return false;
2588
2589                         case self::AS_NO_CREATE_PERMISSION;
2590                                 $this->noCreatePermission();
2591                                 return;
2592
2593                         case self::AS_BLANK_ARTICLE:
2594                                 $wgOut->redirect( $wgTitle->getFullURL() );
2595                                 return false;
2596
2597                         case self::AS_IMAGE_REDIRECT_LOGGED:
2598                                 $wgOut->permissionRequired( 'upload' );
2599                                 return false;
2600                 }
2601         }
2602
2603         function getBaseRevision() {
2604                 if ( $this->mBaseRevision == false ) {
2605                         $db = wfGetDB( DB_MASTER );
2606                         $baseRevision = Revision::loadFromTimestamp(
2607                                 $db, $this->mTitle, $this->edittime );
2608                         return $this->mBaseRevision = $baseRevision;
2609                 } else {
2610                         return $this->mBaseRevision;
2611                 }
2612         }
2613 }