includes/EditPage.php

   1 <?php
   2 /**
   3  * Contains the EditPage class
   4  * @file
   5  */
   6
   7 /**
   8  * The edit page/HTML interface (split from Article)
   9  * The actual database and text munging is still in Article,
  10  * but it should get easier to call those from alternate
  11  * interfaces.
  12  *
  13  * EditPage cares about two distinct titles:
  14  * $wgTitle is the page that forms submit to, links point to,
  15  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  16  * page in the database that is actually being edited. These are
  17  * usually the same, but they are now allowed to be different.
  18  */
  19 class EditPage {
  20         const AS_SUCCESS_UPDATE            = 200;
  21         const AS_SUCCESS_NEW_ARTICLE       = 201;
  22         const AS_HOOK_ERROR                = 210;
  23         const AS_FILTERING                 = 211;
  24         const AS_HOOK_ERROR_EXPECTED       = 212;
  25         const AS_BLOCKED_PAGE_FOR_USER     = 215;
  26         const AS_CONTENT_TOO_BIG           = 216;
  27         const AS_USER_CANNOT_EDIT          = 217;
  28         const AS_READ_ONLY_PAGE_ANON       = 218;
  29         const AS_READ_ONLY_PAGE_LOGGED     = 219;
  30         const AS_READ_ONLY_PAGE            = 220;
  31         const AS_RATE_LIMITED              = 221;
  32         const AS_ARTICLE_WAS_DELETED       = 222;
  33         const AS_NO_CREATE_PERMISSION      = 223;
  34         const AS_BLANK_ARTICLE             = 224;
  35         const AS_CONFLICT_DETECTED         = 225;
  36         const AS_SUMMARY_NEEDED            = 226;
  37         const AS_TEXTBOX_EMPTY             = 228;
  38         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
  39         const AS_OK                        = 230;
  40         const AS_END                       = 231;
  41         const AS_SPAM_ERROR                = 232;
  42         const AS_IMAGE_REDIRECT_ANON       = 233;
  43         const AS_IMAGE_REDIRECT_LOGGED     = 234;
  44
  45         var $mArticle;
  46         var $mTitle;
  47         var $action;
  48         var $mMetaData = '';
  49         var $isConflict = false;
  50         var $isCssJsSubpage = false;
  51         var $isCssSubpage = false;
  52         var $isJsSubpage = false;
  53         var $deletedSinceEdit = false;
  54         var $formtype;
  55         var $firsttime;
  56         var $lastDelete;
  57         var $mTokenOk = false;
  58         var $mTokenOkExceptSuffix = false;
  59         var $mTriedSave = false;
  60         var $tooBig = false;
  61         var $kblength = false;
  62         var $missingComment = false;
  63         var $missingSummary = false;
  64         var $allowBlankSummary = false;
  65         var $autoSumm = '';
  66         var $hookError = '';
  67         #var $mPreviewTemplates;
  68         var $mParserOutput;
  69         var $mBaseRevision = false;
  70         var $mShowSummaryField = true;
  71
  72         # Form values
  73         var $save = false, $preview = false, $diff = false;
  74         var $minoredit = false, $watchthis = false, $recreate = false;
  75         var $textbox1 = '', $textbox2 = '', $summary = '', $nosummary = false;
  76         var $edittime = '', $section = '', $starttime = '';
  77         var $oldid = 0, $editintro = '', $scrolltop = null, $bot = true;
  78
  79         # Placeholders for text injection by hooks (must be HTML)
  80         # extensions should take care to _append_ to the present value
  81         public $editFormPageTop; // Before even the preview
  82         public $editFormTextTop;
  83         public $editFormTextBeforeContent;
  84         public $editFormTextAfterWarn;
  85         public $editFormTextAfterTools;
  86         public $editFormTextBottom;
  87         public $editFormTextAfterContent;
  88         public $previewTextAfterContent;
  89
  90         /* $didSave should be set to true whenever an article was succesfully altered. */
  91         public $didSave = false;
  92         public $undidRev = 0;
  93
  94         public $suppressIntro = false;
  95
  96         /**
  97          * @todo document
  98          * @param $article
  99          */
 100         function EditPage( $article ) {
 101                 $this->mArticle =& $article;
 102                 $this->mTitle = $article->getTitle();
 103                 $this->action = 'submit';
 104
 105                 # Placeholders for text injection by hooks (empty per default)
 106                 $this->editFormPageTop =
 107                 $this->editFormTextTop =
 108                 $this->editFormTextBeforeContent =
 109                 $this->editFormTextAfterWarn =
 110                 $this->editFormTextAfterTools =
 111                 $this->editFormTextBottom =
 112                 $this->editFormTextAfterContent =
 113                 $this->previewTextAfterContent =
 114                 $this->mPreloadText = "";
 115         }
 116
 117         function getArticle() {
 118                 return $this->mArticle;
 119         }
 120
 121
 122         /**
 123          * Fetch initial editing page content.
 124          * @private
 125          */
 126         function getContent( $def_text = '' ) {
 127                 global $wgOut, $wgRequest, $wgParser, $wgContLang, $wgMessageCache;
 128
 129                 wfProfileIn( __METHOD__ );
 130                 # Get variables from query string :P
 131                 $section = $wgRequest->getVal( 'section' );
 132
 133                 $preload = $wgRequest->getVal( 'preload',
 134                         // Custom preload text for new sections
 135                         $section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 136                 $undoafter = $wgRequest->getVal( 'undoafter' );
 137                 $undo = $wgRequest->getVal( 'undo' );
 138
 139                 $text = '';
 140                 // For message page not locally set, use the i18n message.
 141                 // For other non-existent articles, use preload text if any.
 142                 if ( !$this->mTitle->exists() ) {
 143                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 144                                 # If this is a system message, get the default text.
 145                                 list( $message, $lang ) = $wgMessageCache->figureMessage( $wgContLang->lcfirst( $this->mTitle->getText() ) );
 146                                 $wgMessageCache->loadAllMessages( $lang );
 147                                 $text = wfMsgGetKey( $message, false, $lang, false );
 148                                 if( wfEmptyMsg( $message, $text ) )
 149                                         $text = $this->getPreloadedText( $preload );
 150                         } else {
 151                                 # If requested, preload some text.
 152                                 $text = $this->getPreloadedText( $preload );
 153                         }
 154                 // For existing pages, get text based on "undo" or section parameters.
 155                 } else {
 156                         $text = $this->mArticle->getContent();
 157                         if ( $undo > 0 && $undoafter > 0 && $undo < $undoafter ) {
 158                                 # If they got undoafter and undo round the wrong way, switch them
 159                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 160                         }
 161                         if ( $undo > 0 && $undo > $undoafter ) {
 162                                 # Undoing a specific edit overrides section editing; section-editing
 163                                 # doesn't work with undoing.
 164                                 if ( $undoafter ) {
 165                                         $undorev = Revision::newFromId( $undo );
 166                                         $oldrev = Revision::newFromId( $undoafter );
 167                                 } else {
 168                                         $undorev = Revision::newFromId( $undo );
 169                                         $oldrev = $undorev ? $undorev->getPrevious() : null;
 170                                 }
 171
 172                                 # Sanity check, make sure it's the right page,
 173                                 # the revisions exist and they were not deleted.
 174                                 # Otherwise, $text will be left as-is.
 175                                 if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 176                                         $undorev->getPage() == $oldrev->getPage() &&
 177                                         $undorev->getPage() == $this->mArticle->getID() &&
 178                                         !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 179                                         !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 180
 181                                         $undotext = $this->mArticle->getUndoText( $undorev, $oldrev );
 182                                         if ( $undotext === false ) {
 183                                                 # Warn the user that something went wrong
 184                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-failure">' . wfMsgNoTrans( 'undo-failure' ) . '</div>' );
 185                                         } else {
 186                                                 $text = $undotext;
 187                                                 # Inform the user of our success and set an automatic edit summary
 188                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="mw-undo-success">' . wfMsgNoTrans( 'undo-success' ) . '</div>' );
 189                                                 $firstrev = $oldrev->getNext();
 190                                                 # If we just undid one rev, use an autosummary
 191                                                 if ( $firstrev->mId == $undo ) {
 192                                                         $this->summary = wfMsgForContent( 'undo-summary', $undo, $undorev->getUserText() );
 193                                                         $this->undidRev = $undo;
 194                                                 }
 195                                                 $this->formtype = 'diff';
 196                                         }
 197                                 } else {
 198                                         // Failed basic sanity checks.
 199                                         // Older revisions may have been removed since the link
 200                                         // was created, or we may simply have got bogus input.
 201                                         $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-norev">' . wfMsgNoTrans( 'undo-norev' ) . '</div>' );
 202                                 }
 203                         } else if ( $section != '' ) {
 204                                 if ( $section == 'new' ) {
 205                                         $text = $this->getPreloadedText( $preload );
 206                                 } else {
 207                                         $text = $wgParser->getSection( $text, $section, $def_text );
 208                                 }
 209                         }
 210                 }
 211
 212                 wfProfileOut( __METHOD__ );
 213                 return $text;
 214         }
 215
 216         /** Use this method before edit() to preload some text into the edit box */
 217         public function setPreloadedText( $text ) {
 218                 $this->mPreloadText = $text;
 219         }
 220
 221         /**
 222          * Get the contents of a page from its title and remove includeonly tags
 223          *
 224          * @param $preload String: the title of the page.
 225          * @return string The contents of the page.
 226          */
 227         protected function getPreloadedText( $preload ) {
 228                 if ( !empty( $this->mPreloadText ) ) {
 229                         return $this->mPreloadText;
 230                 } elseif ( $preload === '' ) {
 231                         return '';
 232                 } else {
 233                         $preloadTitle = Title::newFromText( $preload );
 234                         if ( isset( $preloadTitle ) && $preloadTitle->userCanRead() ) {
 235                                 $rev = Revision::newFromTitle( $preloadTitle );
 236                                 if ( is_object( $rev ) ) {
 237                                         $text = $rev->getText();
 238                                         // TODO FIXME: AAAAAAAAAAA, this shouldn't be implementing
 239                                         // its own mini-parser! -ævar
 240                                         $text = preg_replace( '~</?includeonly>~', '', $text );
 241                                         return $text;
 242                                 } else
 243                                         return '';
 244                         }
 245                 }
 246         }
 247
 248         /**
 249          * This is the function that extracts metadata from the article body on the first view.
 250          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
 251          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
 252          */
 253         function extractMetaDataFromArticle () {
 254                 global $wgUseMetadataEdit, $wgMetadataWhitelist, $wgContLang;
 255                 $this->mMetaData = '';
 256                 if ( !$wgUseMetadataEdit ) return;
 257                 if ( $wgMetadataWhitelist == '' ) return;
 258                 $s = '';
 259                 $t = $this->getContent();
 260
 261                 # MISSING : <nowiki> filtering
 262
 263                 # Categories and language links
 264                 $t = explode( "\n" , $t );
 265                 $catlow = strtolower( $wgContLang->getNsText( NS_CATEGORY ) );
 266                 $cat = $ll = array();
 267                 foreach ( $t as $key => $x ) {
 268                         $y = trim( strtolower ( $x ) );
 269                         while ( substr( $y , 0 , 2 ) == '[[' ) {
 270                                 $y = explode( ']]' , trim ( $x ) );
 271                                 $first = array_shift( $y );
 272                                 $first = explode( ':' , $first );
 273                                 $ns = array_shift( $first );
 274                                 $ns = trim( str_replace( '[' , '' , $ns ) );
 275                                 if ( $wgContLang->getLanguageName( $ns ) || strtolower( $ns ) == $catlow ) {
 276                                         $add = '[[' . $ns . ':' . implode( ':' , $first ) . ']]';
 277                                         if ( strtolower( $ns ) == $catlow ) $cat[] = $add;
 278                                         else $ll[] = $add;
 279                                         $x = implode( ']]', $y );
 280                                         $t[$key] = $x;
 281                                         $y = trim( strtolower( $x ) );
 282                                 } else {
 283                                         $x = implode( ']]' , $y );
 284                                         $y = trim( strtolower( $x ) );
 285                                 }
 286                         }
 287                 }
 288                 if ( count( $cat ) ) $s .= implode( ' ' , $cat ) . "\n";
 289                 if ( count( $ll ) ) $s .= implode( ' ' , $ll ) . "\n";
 290                 $t = implode( "\n" , $t );
 291
 292                 # Load whitelist
 293                 $sat = array () ; # stand-alone-templates; must be lowercase
 294                 $wl_title = Title::newFromText( $wgMetadataWhitelist );
 295                 $wl_article = new Article ( $wl_title );
 296                 $wl = explode ( "\n" , $wl_article->getContent() );
 297                 foreach ( $wl AS $x ) {
 298                         $isentry = false;
 299                         $x = trim ( $x );
 300                         while ( substr ( $x , 0 , 1 ) == '*' ) {
 301                                 $isentry = true;
 302                                 $x = trim ( substr ( $x , 1 ) );
 303                         }
 304                         if ( $isentry ) {
 305                                 $sat[] = strtolower ( $x );
 306                         }
 307
 308                 }
 309
 310                 # Templates, but only some
 311                 $t = explode( '{{' , $t );
 312                 $tl = array() ;
 313                 foreach ( $t as $key => $x ) {
 314                         $y = explode( '}}' , $x , 2 );
 315                         if ( count( $y ) == 2 ) {
 316                                 $z = $y[0];
 317                                 $z = explode( '|' , $z );
 318                                 $tn = array_shift( $z );
 319                                 if ( in_array( strtolower( $tn ) , $sat ) ) {
 320                                         $tl[] = '{{' . $y[0] . '}}';
 321                                         $t[$key] = $y[1];
 322                                         $y = explode( '}}' , $y[1] , 2 );
 323                                 }
 324                                 else $t[$key] = '{{' . $x;
 325                         }
 326                         else if ( $key != 0 ) $t[$key] = '{{' . $x;
 327                         else $t[$key] = $x;
 328                 }
 329                 if ( count( $tl ) ) $s .= implode( ' ' , $tl );
 330                 $t = implode( '' , $t );
 331
 332                 $t = str_replace( "\n\n\n", "\n", $t );
 333                 $this->mArticle->mContent = $t;
 334                 $this->mMetaData = $s;
 335         }
 336
 337         /*
 338          * Check if a page was deleted while the user was editing it, before submit.
 339          * Note that we rely on the logging table, which hasn't been always there,
 340          * but that doesn't matter, because this only applies to brand new
 341          * deletes.
 342          */
 343         protected function wasDeletedSinceLastEdit() {
 344                 if ( $this->deletedSinceEdit )
 345                         return true;
 346                 if ( $this->mTitle->isDeletedQuick() ) {
 347                         $this->lastDelete = $this->getLastDelete();
 348                         if ( $this->lastDelete ) {
 349                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
 350                                 if ( $deleteTime > $this->starttime ) {
 351                                         $this->deletedSinceEdit = true;
 352                                 }
 353                         }
 354                 }
 355                 return $this->deletedSinceEdit;
 356         }
 357
 358         function submit() {
 359                 $this->edit();
 360         }
 361
 362         /**
 363          * This is the function that gets called for "action=edit". It
 364          * sets up various member variables, then passes execution to
 365          * another function, usually showEditForm()
 366          *
 367          * The edit form is self-submitting, so that when things like
 368          * preview and edit conflicts occur, we get the same form back
 369          * with the extra stuff added.  Only when the final submission
 370          * is made and all is well do we actually save and redirect to
 371          * the newly-edited page.
 372          */
 373         function edit() {
 374                 global $wgOut, $wgRequest;
 375                 // Allow extensions to modify/prevent this form or submission
 376                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 377                         return;
 378                 }
 379
 380                 wfProfileIn( __METHOD__ );
 381                 wfDebug( __METHOD__.": enter\n" );
 382
 383                 // This is not an article
 384                 $wgOut->setArticleFlag( false );
 385
 386                 $this->importFormData( $wgRequest );
 387                 $this->firsttime = false;
 388
 389                 if ( $this->live ) {
 390                         $this->livePreview();
 391                         wfProfileOut( __METHOD__ );
 392                         return;
 393                 }
 394
 395                 if ( wfReadOnly() && $this->save ) {
 396                         // Force preview
 397                         $this->save = false;
 398                         $this->preview = true;
 399                 }
 400
 401                 $wgOut->addScriptFile( 'edit.js' );
 402
 403                 $permErrors = $this->getEditPermissionErrors();
 404                 if ( $permErrors ) {
 405                         wfDebug( __METHOD__ . ": User can't edit\n" );
 406                         $this->readOnlyPage( $this->getContent(), true, $permErrors, 'edit' );
 407                         wfProfileOut( __METHOD__ );
 408                         return;
 409                 } else {
 410                         if ( $this->save ) {
 411                                 $this->formtype = 'save';
 412                         } else if ( $this->preview ) {
 413                                 $this->formtype = 'preview';
 414                         } else if ( $this->diff ) {
 415                                 $this->formtype = 'diff';
 416                         } else { # First time through
 417                                 $this->firsttime = true;
 418                                 if ( $this->previewOnOpen() ) {
 419                                         $this->formtype = 'preview';
 420                                 } else {
 421                                         $this->extractMetaDataFromArticle () ;
 422                                         $this->formtype = 'initial';
 423                                 }
 424                         }
 425                 }
 426
 427                 // If they used redlink=1 and the page exists, redirect to the main article
 428                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 429                         $wgOut->redirect( $this->mTitle->getFullURL() );
 430                 }
 431
 432                 wfProfileIn( __METHOD__."-business-end" );
 433
 434                 $this->isConflict = false;
 435                 // css / js subpages of user pages get a special treatment
 436                 $this->isCssJsSubpage      = $this->mTitle->isCssJsSubpage();
 437                 $this->isCssSubpage        = $this->mTitle->isCssSubpage();
 438                 $this->isJsSubpage         = $this->mTitle->isJsSubpage();
 439                 $this->isValidCssJsSubpage = $this->mTitle->isValidCssJsSubpage();
 440
 441                 # Show applicable editing introductions
 442                 if ( $this->formtype == 'initial' || $this->firsttime )
 443                         $this->showIntro();
 444
 445                 if ( $this->mTitle->isTalkPage() ) {
 446                         $wgOut->addWikiMsg( 'talkpagetext' );
 447                 }
 448
 449                 # Optional notices on a per-namespace and per-page basis
 450                 $editnotice_ns   = 'editnotice-'.$this->mTitle->getNamespace();
 451                 if ( !wfEmptyMsg( $editnotice_ns, wfMsgForContent( $editnotice_ns ) ) ) {
 452                         $wgOut->addWikiText( wfMsgForContent( $editnotice_ns )  );
 453                 }
 454                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
 455                         $parts = explode( '/', $this->mTitle->getDBkey() );
 456                         $editnotice_base = $editnotice_ns;
 457                         while ( count( $parts ) > 0 ) {
 458                                 $editnotice_base .= '-'.array_shift( $parts );
 459                                 if ( !wfEmptyMsg( $editnotice_base, wfMsgForContent( $editnotice_base ) ) ) {
 460                                         $wgOut->addWikiText( wfMsgForContent( $editnotice_base )  );
 461                                 }
 462                         }
 463                 }
 464
 465                 # Attempt submission here.  This will check for edit conflicts,
 466                 # and redundantly check for locked database, blocked IPs, etc.
 467                 # that edit() already checked just in case someone tries to sneak
 468                 # in the back door with a hand-edited submission URL.
 469
 470                 if ( 'save' == $this->formtype ) {
 471                         if ( !$this->attemptSave() ) {
 472                                 wfProfileOut( __METHOD__."-business-end" );
 473                                 wfProfileOut( __METHOD__ );
 474                                 return;
 475                         }
 476                 }
 477
 478                 # First time through: get contents, set time for conflict
 479                 # checking, etc.
 480                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 481                         if ( $this->initialiseForm() === false ) {
 482                                 $this->noSuchSectionPage();
 483                                 wfProfileOut( __METHOD__."-business-end" );
 484                                 wfProfileOut( __METHOD__ );
 485                                 return;
 486                         }
 487                         if ( !$this->mTitle->getArticleId() )
 488                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 489                 }
 490
 491                 $this->showEditForm();
 492                 wfProfileOut( __METHOD__."-business-end" );
 493                 wfProfileOut( __METHOD__ );
 494         }
 495
 496         protected function getEditPermissionErrors() {
 497                 global $wgUser;
 498                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 499                 # Can this title be created?
 500                 if ( !$this->mTitle->exists() ) {
 501                         $permErrors = array_merge( $permErrors,
 502                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 503                 }
 504                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 505                 $remove = array();
 506                 foreach( $permErrors as $error ) {
 507                         if ( ( $this->preview || $this->diff ) &&
 508                                 ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' ) )
 509                         {
 510                                 $remove[] = $error;
 511                         }
 512                 }
 513                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 514                 return $permErrors;
 515         }
 516
 517         /**
 518          * Show a read-only error
 519          * Parameters are the same as OutputPage:readOnlyPage()
 520          * Redirect to the article page if redlink=1
 521          */
 522         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 523                 global $wgRequest, $wgOut;
 524                 if ( $wgRequest->getBool( 'redlink' ) ) {
 525                         // The edit page was reached via a red link.
 526                         // Redirect to the article page and let them click the edit tab if
 527                         // they really want a permission error.
 528                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 529                 } else {
 530                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 531                 }
 532         }
 533
 534         /**
 535          * Should we show a preview when the edit form is first shown?
 536          *
 537          * @return bool
 538          */
 539         protected function previewOnOpen() {
 540                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 541                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 542                         // Explicit override from request
 543                         return true;
 544                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 545                         // Explicit override from request
 546                         return false;
 547                 } elseif ( $this->section == 'new' ) {
 548                         // Nothing *to* preview for new sections
 549                         return false;
 550                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 551                         // Standard preference behaviour
 552                         return true;
 553                 } elseif ( !$this->mTitle->exists() &&
 554                   isset($wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]) &&
 555                   $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 556                 {
 557                         // Categories are special
 558                         return true;
 559                 } else {
 560                         return false;
 561                 }
 562         }
 563
 564         /**
 565          * Does this EditPage class support section editing?
 566          * This is used by EditPage subclasses to indicate their ui cannot handle section edits
 567          *
 568          * @return bool
 569          */
 570         protected function isSectionEditSupported() {
 571                 return true;
 572         }
 573
 574         /**
 575          * Returns the URL to use in the form's action attribute.
 576          * This is used by EditPage subclasses when simply customizing the action
 577          * variable in the constructor is not enough. This can be used when the
 578          * EditPage lives inside of a Special page rather than a custom page action.
 579          *
 580          * @param Title $title The title for which is being edited (where we go to for &action= links)
 581          * @return string
 582          */
 583         protected function getActionURL( Title $title ) {
 584                 return $title->getLocalURL( array( 'action' => $this->action ) );
 585         }
 586
 587         /**
 588          * @todo document
 589          * @param $request
 590          */
 591         function importFormData( &$request ) {
 592                 global $wgLang, $wgUser;
 593
 594                 wfProfileIn( __METHOD__ );
 595
 596                 # Section edit can come from either the form or a link
 597                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 598
 599                 if ( $request->wasPosted() ) {
 600                         # These fields need to be checked for encoding.
 601                         # Also remove trailing whitespace, but don't remove _initial_
 602                         # whitespace from the text boxes. This may be significant formatting.
 603                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 604                         if ( !$request->getCheck('wpTextbox2') ) {
 605                                 // Skip this if wpTextbox2 has input, it indicates that we came
 606                                 // from a conflict page with raw page text, not a custom form
 607                                 // modified by subclasses
 608                                 wfProfileIn( get_class($this)."::importContentFormData" );
 609                                 $textbox1 = $this->importContentFormData( $request );
 610                                 if ( isset($textbox1) )
 611                                         $this->textbox1 = $textbox1;
 612                                 wfProfileOut( get_class($this)."::importContentFormData" );
 613                         }
 614                         $this->mMetaData = rtrim( $request->getText( 'metadata' ) );
 615                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 616                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary' ), 250, '' );
 617
 618                         # Remove extra headings from summaries and new sections.
 619                         $this->summary = preg_replace('/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary);
 620
 621                         $this->edittime = $request->getVal( 'wpEdittime' );
 622                         $this->starttime = $request->getVal( 'wpStarttime' );
 623
 624                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 625
 626                         if ( is_null( $this->edittime ) ) {
 627                                 # If the form is incomplete, force to preview.
 628                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 629                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 630                                 $this->preview = true;
 631                         } else {
 632                                 /* Fallback for live preview */
 633                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 634                                 $this->diff = $request->getCheck( 'wpDiff' );
 635
 636                                 // Remember whether a save was requested, so we can indicate
 637                                 // if we forced preview due to session failure.
 638                                 $this->mTriedSave = !$this->preview;
 639
 640                                 if ( $this->tokenOk( $request ) ) {
 641                                         # Some browsers will not report any submit button
 642                                         # if the user hits enter in the comment box.
 643                                         # The unmarked state will be assumed to be a save,
 644                                         # if the form seems otherwise complete.
 645                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 646                                 } else if ( $this->diff ) {
 647                                         # Failed token check, but only requested "Show Changes".
 648                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 649                                 } else {
 650                                         # Page might be a hack attempt posted from
 651                                         # an external site. Preview instead of saving.
 652                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 653                                         $this->preview = true;
 654                                 }
 655                         }
 656                         $this->save = !$this->preview && !$this->diff;
 657                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 658                                 $this->edittime = null;
 659                         }
 660
 661                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 662                                 $this->starttime = null;
 663                         }
 664
 665                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 666
 667                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 668                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 669
 670                         # Don't force edit summaries when a user is editing their own user or talk page
 671                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 672                                 $this->mTitle->getText() == $wgUser->getName() )
 673                         {
 674                                 $this->allowBlankSummary = true;
 675                         } else {
 676                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary');
 677                         }
 678
 679                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 680                 } else {
 681                         # Not a posted form? Start with nothing.
 682                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 683                         $this->textbox1  = '';
 684                         $this->mMetaData = '';
 685                         $this->summary   = '';
 686                         $this->edittime  = '';
 687                         $this->starttime = wfTimestampNow();
 688                         $this->edit      = false;
 689                         $this->preview   = false;
 690                         $this->save      = false;
 691                         $this->diff      = false;
 692                         $this->minoredit = false;
 693                         $this->watchthis = $request->getBool( 'watchthis', false ); // Watch may be overriden by request parameters
 694                         $this->recreate  = false;
 695
 696                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 697                                 $this->summary = $request->getVal( 'preloadtitle' );
 698                         }
 699                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 700                                 $this->summary = $request->getText( 'summary' );
 701                         }
 702
 703                         if ( $request->getVal( 'minor' ) ) {
 704                                 $this->minoredit = true;
 705                         }
 706                 }
 707
 708                 $this->bot = $request->getBool( 'bot', true );
 709                 $this->nosummary = $request->getBool( 'nosummary' );
 710
 711                 // FIXME: unused variable?
 712                 $this->oldid = $request->getInt( 'oldid' );
 713
 714                 $this->live = $request->getCheck( 'live' );
 715                 $this->editintro = $request->getText( 'editintro',
 716                         // Custom edit intro for new sections
 717                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 718
 719                 wfProfileOut( __METHOD__ );
 720
 721                 // Allow extensions to modify form data
 722                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 723         }
 724
 725         /**
 726          * Subpage overridable method for extracting the page content data from the
 727          * posted form to be placed in $this->textbox1, if using customized input
 728          * this method should be overrided and return the page text that will be used
 729          * for saving, preview parsing and so on...
 730          *
 731          * @praram WebRequest $request
 732          */
 733         protected function importContentFormData( &$request ) {
 734                 return; // Don't do anything, EditPage already extracted wpTextbox1
 735         }
 736
 737         /**
 738          * Make sure the form isn't faking a user's credentials.
 739          *
 740          * @param $request WebRequest
 741          * @return bool
 742          * @private
 743          */
 744         function tokenOk( &$request ) {
 745                 global $wgUser;
 746                 $token = $request->getVal( 'wpEditToken' );
 747                 $this->mTokenOk = $wgUser->matchEditToken( $token );
 748                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
 749                 return $this->mTokenOk;
 750         }
 751
 752         /**
 753          * Show all applicable editing introductions
 754          */
 755         protected function showIntro() {
 756                 global $wgOut, $wgUser;
 757                 if ( $this->suppressIntro ) {
 758                         return;
 759                 }
 760
 761                 $namespace = $this->mTitle->getNamespace();
 762
 763                 if ( $namespace == NS_MEDIAWIKI ) {
 764                         # Show a warning if editing an interface message
 765                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1</div>", 'editinginterface' );
 766                 }
 767
 768                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exists
 769                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
 770                         $parts = explode( '/', $this->mTitle->getText(), 2 );
 771                         $username = $parts[0];
 772                         $id = User::idFromName( $username );
 773                         $ip = User::isIP( $username );
 774                         if ( $id == 0 && !$ip ) {
 775                                 $wgOut->wrapWikiMsg( '<div class="mw-userpage-userdoesnotexist error">$1</div>',
 776                                         array( 'userpage-userdoesnotexist', $username ) );
 777                         }
 778                 }
 779                 # Try to add a custom edit intro, or use the standard one if this is not possible.
 780                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
 781                         if ( $wgUser->isLoggedIn() ) {
 782                                 $wgOut->wrapWikiMsg( '<div class="mw-newarticletext">$1</div>', 'newarticletext' );
 783                         } else {
 784                                 $wgOut->wrapWikiMsg( '<div class="mw-newarticletextanon">$1</div>', 'newarticletextanon' );
 785                         }
 786                 }
 787                 # Give a notice if the user is editing a deleted/moved page...
 788                 if ( !$this->mTitle->exists() ) {
 789                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle->getPrefixedText(),
 790                                 '', array( 'lim' => 10,
 791                                            'conds' => array( "log_action != 'revision'" ),
 792                                            'showIfEmpty' => false,
 793                                            'msgKey' => array( 'recreate-moveddeleted-warn') )
 794                         );
 795                 }
 796         }
 797
 798         /**
 799          * Attempt to show a custom editing introduction, if supplied
 800          *
 801          * @return bool
 802          */
 803         protected function showCustomIntro() {
 804                 if ( $this->editintro ) {
 805                         $title = Title::newFromText( $this->editintro );
 806                         if ( $title instanceof Title && $title->exists() && $title->userCanRead() ) {
 807                                 global $wgOut;
 808                                 $revision = Revision::newFromTitle( $title );
 809                                 $wgOut->addWikiTextTitleTidy( $revision->getText(), $this->mTitle );
 810                                 return true;
 811                         } else {
 812                                 return false;
 813                         }
 814                 } else {
 815                         return false;
 816                 }
 817         }
 818
 819         /**
 820          * Attempt submission (no UI)
 821          * @return one of the constants describing the result
 822          */
 823         function internalAttemptSave( &$result, $bot = false ) {
 824                 global $wgFilterCallback, $wgUser, $wgOut, $wgParser;
 825                 global $wgMaxArticleSize;
 826
 827                 wfProfileIn( __METHOD__  );
 828                 wfProfileIn( __METHOD__ . '-checks' );
 829
 830                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) )
 831                 {
 832                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
 833                         return self::AS_HOOK_ERROR;
 834                 }
 835
 836                 # Check image redirect
 837                 if ( $this->mTitle->getNamespace() == NS_FILE &&
 838                         Title::newFromRedirect( $this->textbox1 ) instanceof Title &&
 839                         !$wgUser->isAllowed( 'upload' ) ) {
 840                                 if ( $wgUser->isAnon() ) {
 841                                         return self::AS_IMAGE_REDIRECT_ANON;
 842                                 } else {
 843                                         return self::AS_IMAGE_REDIRECT_LOGGED;
 844                                 }
 845                 }
 846
 847                 # Reintegrate metadata
 848                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 849                 $this->mMetaData = '' ;
 850
 851                 # Check for spam
 852                 $match = self::matchSummarySpamRegex( $this->summary );
 853                 if ( $match === false ) {
 854                         $match = self::matchSpamRegex( $this->textbox1 );
 855                 }
 856                 if ( $match !== false ) {
 857                         $result['spam'] = $match;
 858                         $ip = wfGetIP();
 859                         $pdbk = $this->mTitle->getPrefixedDBkey();
 860                         $match = str_replace( "\n", '', $match );
 861                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
 862                         wfProfileOut( __METHOD__ . '-checks' );
 863                         wfProfileOut( __METHOD__ );
 864                         return self::AS_SPAM_ERROR;
 865                 }
 866                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
 867                         # Error messages or other handling should be performed by the filter function
 868                         wfProfileOut( __METHOD__ . '-checks' );
 869                         wfProfileOut( __METHOD__ );
 870                         return self::AS_FILTERING;
 871                 }
 872                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
 873                         # Error messages etc. could be handled within the hook...
 874                         wfProfileOut( __METHOD__ . '-checks' );
 875                         wfProfileOut( __METHOD__ );
 876                         return self::AS_HOOK_ERROR;
 877                 } elseif ( $this->hookError != '' ) {
 878                         # ...or the hook could be expecting us to produce an error
 879                         wfProfileOut( __METHOD__ . '-checks' );
 880                         wfProfileOut( __METHOD__ );
 881                         return self::AS_HOOK_ERROR_EXPECTED;
 882                 }
 883                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 884                         # Check block state against master, thus 'false'.
 885                         wfProfileOut( __METHOD__ . '-checks' );
 886                         wfProfileOut( __METHOD__ );
 887                         return self::AS_BLOCKED_PAGE_FOR_USER;
 888                 }
 889                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
 890                 if ( $this->kblength > $wgMaxArticleSize ) {
 891                         // Error will be displayed by showEditForm()
 892                         $this->tooBig = true;
 893                         wfProfileOut( __METHOD__ . '-checks' );
 894                         wfProfileOut( __METHOD__ );
 895                         return self::AS_CONTENT_TOO_BIG;
 896                 }
 897
 898                 if ( !$wgUser->isAllowed( 'edit' ) ) {
 899                         if ( $wgUser->isAnon() ) {
 900                                 wfProfileOut( __METHOD__ . '-checks' );
 901                                 wfProfileOut( __METHOD__ );
 902                                 return self::AS_READ_ONLY_PAGE_ANON;
 903                         } else {
 904                                 wfProfileOut( __METHOD__ . '-checks' );
 905                                 wfProfileOut( __METHOD__ );
 906                                 return self::AS_READ_ONLY_PAGE_LOGGED;
 907                         }
 908                 }
 909
 910                 if ( wfReadOnly() ) {
 911                         wfProfileOut( __METHOD__ . '-checks' );
 912                         wfProfileOut( __METHOD__ );
 913                         return self::AS_READ_ONLY_PAGE;
 914                 }
 915                 if ( $wgUser->pingLimiter() ) {
 916                         wfProfileOut( __METHOD__ . '-checks' );
 917                         wfProfileOut( __METHOD__ );
 918                         return self::AS_RATE_LIMITED;
 919                 }
 920
 921                 # If the article has been deleted while editing, don't save it without
 922                 # confirmation
 923                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
 924                         wfProfileOut( __METHOD__ . '-checks' );
 925                         wfProfileOut( __METHOD__ );
 926                         return self::AS_ARTICLE_WAS_DELETED;
 927                 }
 928
 929                 wfProfileOut( __METHOD__ . '-checks' );
 930
 931                 # If article is new, insert it.
 932                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 933                 if ( 0 == $aid ) {
 934                         // Late check for create permission, just in case *PARANOIA*
 935                         if ( !$this->mTitle->userCan( 'create' ) ) {
 936                                 wfDebug( __METHOD__ . ": no create permission\n" );
 937                                 wfProfileOut( __METHOD__ );
 938                                 return self::AS_NO_CREATE_PERMISSION;
 939                         }
 940
 941                         # Don't save a new article if it's blank.
 942                         if ( $this->textbox1 == '' ) {
 943                                 wfProfileOut( __METHOD__ );
 944                                 return self::AS_BLANK_ARTICLE;
 945                         }
 946
 947                         // Run post-section-merge edit filter
 948                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
 949                                 # Error messages etc. could be handled within the hook...
 950                                 wfProfileOut( __METHOD__ );
 951                                 return self::AS_HOOK_ERROR;
 952                         } elseif ( $this->hookError != '' ) {
 953                                 # ...or the hook could be expecting us to produce an error
 954                                 wfProfileOut( __METHOD__ );
 955                                 return self::AS_HOOK_ERROR_EXPECTED;
 956                         }
 957
 958                         # Handle the user preference to force summaries here. Check if it's not a redirect.
 959                         if ( !$this->allowBlankSummary && !Title::newFromRedirect( $this->textbox1 ) ) {
 960                                 if ( md5( $this->summary ) == $this->autoSumm ) {
 961                                         $this->missingSummary = true;
 962                                         wfProfileOut( __METHOD__ );
 963                                         return self::AS_SUMMARY_NEEDED;
 964                                 }
 965                         }
 966
 967                         $isComment = ( $this->section == 'new' );
 968
 969                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 970                                 $this->minoredit, $this->watchthis, false, $isComment, $bot );
 971
 972                         wfProfileOut( __METHOD__ );
 973                         return self::AS_SUCCESS_NEW_ARTICLE;
 974                 }
 975
 976                 # Article exists. Check for edit conflict.
 977
 978                 $this->mArticle->clear(); # Force reload of dates, etc.
 979                 $this->mArticle->forUpdate( true ); # Lock the article
 980
 981                 wfDebug( "timestamp: {$this->mArticle->getTimestamp()}, edittime: {$this->edittime}\n" );
 982
 983                 if ( $this->mArticle->getTimestamp() != $this->edittime ) {
 984                         $this->isConflict = true;
 985                         if ( $this->section == 'new' ) {
 986                                 if ( $this->mArticle->getUserText() == $wgUser->getName() &&
 987                                         $this->mArticle->getComment() == $this->summary ) {
 988                                         // Probably a duplicate submission of a new comment.
 989                                         // This can happen when squid resends a request after
 990                                         // a timeout but the first one actually went through.
 991                                         wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
 992                                 } else {
 993                                         // New comment; suppress conflict.
 994                                         $this->isConflict = false;
 995                                         wfDebug( __METHOD__ .": conflict suppressed; new section\n" );
 996                                 }
 997                         }
 998                 }
 999                 $userid = $wgUser->getId();
1000
1001                 # Suppress edit conflict with self, except for section edits where merging is required.
1002                 if ( $this->isConflict && $this->section == '' && $this->userWasLastToEdit( $userid, $this->edittime ) ) {
1003                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1004                         $this->isConflict = false;
1005                 }
1006
1007                 if ( $this->isConflict ) {
1008                         wfDebug( __METHOD__ . ": conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
1009                                 $this->mArticle->getTimestamp() . "')\n" );
1010                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime );
1011                 } else {
1012                         wfDebug( __METHOD__ . ": getting section '$this->section'\n" );
1013                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary );
1014                 }
1015                 if ( is_null( $text ) ) {
1016                         wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1017                         $this->isConflict = true;
1018                         $text = $this->textbox1; // do not try to merge here!
1019                 } else if ( $this->isConflict ) {
1020                         # Attempt merge
1021                         if ( $this->mergeChangesInto( $text ) ) {
1022                                 // Successful merge! Maybe we should tell the user the good news?
1023                                 $this->isConflict = false;
1024                                 wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1025                         } else {
1026                                 $this->section = '';
1027                                 $this->textbox1 = $text;
1028                                 wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1029                         }
1030                 }
1031
1032                 if ( $this->isConflict ) {
1033                         wfProfileOut( __METHOD__ );
1034                         return self::AS_CONFLICT_DETECTED;
1035                 }
1036
1037                 $oldtext = $this->mArticle->getContent();
1038
1039                 // Run post-section-merge edit filter
1040                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$this->hookError, $this->summary ) ) ) {
1041                         # Error messages etc. could be handled within the hook...
1042                         wfProfileOut( __METHOD__ );
1043                         return self::AS_HOOK_ERROR;
1044                 } elseif ( $this->hookError != '' ) {
1045                         # ...or the hook could be expecting us to produce an error
1046                         wfProfileOut( __METHOD__ );
1047                         return self::AS_HOOK_ERROR_EXPECTED;
1048                 }
1049
1050                 # Handle the user preference to force summaries here, but not for null edits
1051                 if ( $this->section != 'new' && !$this->allowBlankSummary && 0 != strcmp( $oldtext, $text )
1052                         && !Title::newFromRedirect( $text ) ) # check if it's not a redirect
1053                 {
1054                         if ( md5( $this->summary ) == $this->autoSumm ) {
1055                                 $this->missingSummary = true;
1056                                 wfProfileOut( __METHOD__ );
1057                                 return self::AS_SUMMARY_NEEDED;
1058                         }
1059                 }
1060
1061                 # And a similar thing for new sections
1062                 if ( $this->section == 'new' && !$this->allowBlankSummary ) {
1063                         if ( trim( $this->summary ) == '' ) {
1064                                 $this->missingSummary = true;
1065                                 wfProfileOut( __METHOD__ );
1066                                 return self::AS_SUMMARY_NEEDED;
1067                         }
1068                 }
1069
1070                 # All's well
1071                 wfProfileIn( __METHOD__ . '-sectionanchor' );
1072                 $sectionanchor = '';
1073                 if ( $this->section == 'new' ) {
1074                         if ( $this->textbox1 == '' ) {
1075                                 $this->missingComment = true;
1076                                 wfProfileOut( __METHOD__ . '-sectionanchor' );
1077                                 wfProfileOut( __METHOD__ );
1078                                 return self::AS_TEXTBOX_EMPTY;
1079                         }
1080                         if ( $this->summary != '' ) {
1081                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $this->summary );
1082                                 # This is a new section, so create a link to the new section
1083                                 # in the revision summary.
1084                                 $cleanSummary = $wgParser->stripSectionName( $this->summary );
1085                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1086                         }
1087                 } elseif ( $this->section != '' ) {
1088                         # Try to get a section anchor from the section source, redirect to edited section if header found
1089                         # XXX: might be better to integrate this into Article::replaceSection
1090                         # for duplicate heading checking and maybe parsing
1091                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1092                         # we can't deal with anchors, includes, html etc in the header for now,
1093                         # headline would need to be parsed to improve this
1094                         if ( $hasmatch and strlen( $matches[2] ) > 0 ) {
1095                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $matches[2] );
1096                         }
1097                 }
1098                 wfProfileOut( __METHOD__ . '-sectionanchor' );
1099
1100                 // Save errors may fall down to the edit form, but we've now
1101                 // merged the section into full text. Clear the section field
1102                 // so that later submission of conflict forms won't try to
1103                 // replace that into a duplicated mess.
1104                 $this->textbox1 = $text;
1105                 $this->section = '';
1106
1107                 // Check for length errors again now that the section is merged in
1108                 $this->kblength = (int)( strlen( $text ) / 1024 );
1109                 if ( $this->kblength > $wgMaxArticleSize ) {
1110                         $this->tooBig = true;
1111                         wfProfileOut( __METHOD__ );
1112                         return self::AS_MAX_ARTICLE_SIZE_EXCEEDED;
1113                 }
1114
1115                 # update the article here
1116                 if ( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
1117                         $this->watchthis, $bot, $sectionanchor ) )
1118                 {
1119                         wfProfileOut( __METHOD__ );
1120                         return self::AS_SUCCESS_UPDATE;
1121                 } else {
1122                         $this->isConflict = true;
1123                 }
1124                 wfProfileOut( __METHOD__ );
1125                 return self::AS_END;
1126         }
1127
1128         /**
1129          * Check if no edits were made by other users since
1130          * the time a user started editing the page. Limit to
1131          * 50 revisions for the sake of performance.
1132          */
1133         protected function userWasLastToEdit( $id, $edittime ) {
1134                 if( !$id ) return false;
1135                 $dbw = wfGetDB( DB_MASTER );
1136                 $res = $dbw->select( 'revision',
1137                         'rev_user',
1138                         array(
1139                                 'rev_page' => $this->mArticle->getId(),
1140                                 'rev_timestamp > '.$dbw->addQuotes( $dbw->timestamp($edittime) )
1141                         ),
1142                         __METHOD__,
1143                         array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
1144                 while( $row = $res->fetchObject() ) {
1145                         if( $row->rev_user != $id ) {
1146                                 return false;
1147                         }
1148                 }
1149                 return true;
1150         }
1151
1152         /**
1153          * Check given input text against $wgSpamRegex, and return the text of the first match.
1154          * @return mixed -- matching string or false
1155          */
1156         public static function matchSpamRegex( $text ) {
1157                 global $wgSpamRegex;
1158                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1159                 $regexes = (array)$wgSpamRegex;
1160                 return self::matchSpamRegexInternal( $text, $regexes );
1161         }
1162
1163         /**
1164          * Check given input text against $wgSpamRegex, and return the text of the first match.
1165          * @return mixed -- matching string or false
1166          */
1167         public static function matchSummarySpamRegex( $text ) {
1168                 global $wgSummarySpamRegex;
1169                 $regexes = (array)$wgSummarySpamRegex;
1170                 return self::matchSpamRegexInternal( $text, $regexes );
1171         }
1172
1173         protected static function matchSpamRegexInternal( $text, $regexes ) {
1174                 foreach( $regexes as $regex ) {
1175                         $matches = array();
1176                         if( preg_match( $regex, $text, $matches ) ) {
1177                                 return $matches[0];
1178                         }
1179                 }
1180                 return false;
1181         }
1182
1183         /**
1184          * Initialise form fields in the object
1185          * Called on the first invocation, e.g. when a user clicks an edit link
1186          */
1187         function initialiseForm() {
1188                 global $wgUser;
1189                 $this->edittime = $this->mArticle->getTimestamp();
1190                 $this->textbox1 = $this->getContent( false );
1191                 // activate checkboxes if user wants them to be always active
1192                 # Sort out the "watch" checkbox
1193                 if ( $wgUser->getOption( 'watchdefault' ) ) {
1194                         # Watch all edits
1195                         $this->watchthis = true;
1196                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1197                         # Watch creations
1198                         $this->watchthis = true;
1199                 } elseif ( $this->mTitle->userIsWatching() ) {
1200                         # Already watched
1201                         $this->watchthis = true;
1202                 }
1203                 if ( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
1204                 if ( $this->textbox1 === false ) return false;
1205                 wfProxyCheck();
1206                 return true;
1207         }
1208
1209         function setHeaders() {
1210                 global $wgOut, $wgTitle;
1211                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1212                 if ( $this->formtype == 'preview' ) {
1213                         $wgOut->setPageTitleActionText( wfMsg( 'preview' ) );
1214                 }
1215                 if ( $this->isConflict ) {
1216                         $wgOut->setPageTitle( wfMsg( 'editconflict', $wgTitle->getPrefixedText() ) );
1217                 } elseif ( $this->section != '' ) {
1218                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1219                         $wgOut->setPageTitle( wfMsg( $msg, $wgTitle->getPrefixedText() ) );
1220                 } else {
1221                         # Use the title defined by DISPLAYTITLE magic word when present
1222                         if ( isset( $this->mParserOutput )
1223                          && ( $dt = $this->mParserOutput->getDisplayTitle() ) !== false ) {
1224                                 $title = $dt;
1225                         } else {
1226                                 $title = $wgTitle->getPrefixedText();
1227                         }
1228                         $wgOut->setPageTitle( wfMsg( 'editing', $title ) );
1229                 }
1230         }
1231
1232         /**
1233          * Send the edit form and related headers to $wgOut
1234          * @param $formCallback Optional callable that takes an OutputPage
1235          *                      parameter; will be called during form output
1236          *                      near the top, for captchas and the like.
1237          */
1238         function showEditForm( $formCallback=null ) {
1239                 global $wgOut, $wgUser, $wgTitle;
1240
1241                 # If $wgTitle is null, that means we're in API mode.
1242                 # Some hook probably called this function  without checking
1243                 # for is_null($wgTitle) first. Bail out right here so we don't
1244                 # do lots of work just to discard it right after.
1245                 if ( is_null( $wgTitle ) )
1246                         return;
1247
1248                 wfProfileIn( __METHOD__ );
1249
1250                 $sk = $wgUser->getSkin();
1251
1252                 #need to parse the preview early so that we know which templates are used,
1253                 #otherwise users with "show preview after edit box" will get a blank list
1254                 #we parse this near the beginning so that setHeaders can do the title
1255                 #setting work instead of leaving it in getPreviewText
1256                 $previewOutput = '';
1257                 if ( $this->formtype == 'preview' ) {
1258                         $previewOutput = $this->getPreviewText();
1259                 }
1260
1261                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) );
1262
1263                 $this->setHeaders();
1264
1265                 # Enabled article-related sidebar, toplinks, etc.
1266                 $wgOut->setArticleRelated( true );
1267
1268                 if ( $this->showHeader() === false )
1269                         return;
1270
1271                 $action = htmlspecialchars($this->getActionURL($wgTitle));
1272
1273                 if ( $wgUser->getOption( 'showtoolbar' ) and !$this->isCssJsSubpage ) {
1274                         # prepare toolbar for edit buttons
1275                         $toolbar = EditPage::getEditToolbar();
1276                 } else {
1277                         $toolbar = '';
1278                 }
1279
1280
1281                 $wgOut->addHTML( $this->editFormPageTop );
1282
1283                 if ( $wgUser->getOption( 'previewontop' ) ) {
1284                         $this->displayPreviewArea( $previewOutput, true );
1285                 }
1286
1287                 $wgOut->addHTML( $this->editFormTextTop );
1288
1289                 $templates = $this->getTemplates();
1290                 $formattedtemplates = $sk->formatTemplates( $templates, $this->preview, $this->section != '');
1291
1292                 $hiddencats = $this->mArticle->getHiddenCategories();
1293                 $formattedhiddencats = $sk->formatHiddenCategories( $hiddencats );
1294
1295                 if ( $this->wasDeletedSinceLastEdit() && 'save' != $this->formtype ) {
1296                         $wgOut->wrapWikiMsg(
1297                                 "<div class='error mw-deleted-while-editing'>\n$1</div>",
1298                                 'deletedwhileediting' );
1299                 } elseif ( $this->wasDeletedSinceLastEdit() ) {
1300                         // Hide the toolbar and edit area, user can click preview to get it back
1301                         // Add an confirmation checkbox and explanation.
1302                         $toolbar = '';
1303                         // @todo move this to a cleaner conditional instead of blanking a variable
1304                 }
1305                 $wgOut->addHTML( <<<HTML
1306 {$toolbar}
1307 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1308 HTML
1309 );
1310
1311                 if ( is_callable( $formCallback ) ) {
1312                         call_user_func_array( $formCallback, array( &$wgOut ) );
1313                 }
1314
1315                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1316
1317                 // Put these up at the top to ensure they aren't lost on early form submission
1318                 $this->showFormBeforeText();
1319
1320                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
1321                         $wgOut->addHTML(
1322                                 '<div class="mw-confirm-recreate">' .
1323                                 $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ) ) .
1324                                 Xml::checkLabel( wfMsg( 'recreate' ), 'wpRecreate', 'wpRecreate', false,
1325                                         array( 'title' => $sk->titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
1326                                 ) .
1327                                 '</div>'
1328                         );
1329                 }
1330
1331                 # If a blank edit summary was previously provided, and the appropriate
1332                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1333                 # user being bounced back more than once in the event that a summary
1334                 # is not required.
1335                 #####
1336                 # For a bit more sophisticated detection of blank summaries, hash the
1337                 # automatic one and pass that in the hidden field wpAutoSummary.
1338                 if ( $this->missingSummary ||
1339                         ( $this->section == 'new' && $this->nosummary ) )
1340                                 $wgOut->addHTML( Xml::hidden( 'wpIgnoreBlankSummary', true ) );
1341                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1342                 $wgOut->addHTML( Xml::hidden( 'wpAutoSummary', $autosumm ) );
1343
1344                 if ( $this->section == 'new' ) {
1345                         $this->showSummaryInput( true, $this->summary );
1346                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
1347                 }
1348
1349                 $wgOut->addHTML( $this->editFormTextBeforeContent );
1350
1351                 if ( $this->isConflict ) {
1352                         // In an edit conflict bypass the overrideable content form method
1353                         // and fallback to the raw wpTextbox1 since editconflicts can't be
1354                         // resolved between page source edits and custom ui edits using the
1355                         // custom edit ui.
1356                         $this->showTextbox1();
1357                 } else {
1358                         $this->showContentForm();
1359                 }
1360
1361                 $wgOut->addHTML( $this->editFormTextAfterContent );
1362
1363                 $wgOut->addWikiText( $this->getCopywarn() );
1364                 if ( isset($this->editFormTextAfterWarn) && $this->editFormTextAfterWarn !== '' )
1365                         $wgOut->addHTML( $this->editFormTextAfterWarn );
1366
1367                 global $wgUseMetadataEdit;
1368                 if ( $wgUseMetadataEdit )
1369                         $this->showMetaData();
1370
1371                 $this->showStandardInputs();
1372
1373                 $this->showFormAfterText();
1374
1375                 $this->showTosSummary();
1376                 $this->showEditTools();
1377
1378                 $wgOut->addHTML( <<<HTML
1379 {$this->editFormTextAfterTools}
1380 <div class='templatesUsed'>
1381 {$formattedtemplates}
1382 </div>
1383 <div class='hiddencats'>
1384 {$formattedhiddencats}
1385 </div>
1386 HTML
1387 );
1388
1389                 if ( $this->isConflict )
1390                         $this->showConflict();
1391
1392                 $wgOut->addHTML( $this->editFormTextBottom );
1393                 $wgOut->addHTML( "</form>\n" );
1394                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1395                         $this->displayPreviewArea( $previewOutput, false );
1396                 }
1397
1398                 wfProfileOut( __METHOD__ );
1399         }
1400
1401         protected function showHeader() {
1402                 global $wgOut, $wgParser, $wgUser, $wgTitle, $wgMaxArticleSize, $wgLang;
1403                 if ( $this->isConflict ) {
1404                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1</div>", 'explainconflict' );
1405                         $this->edittime = $this->mArticle->getTimestamp();
1406                 } else {
1407                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
1408                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
1409                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
1410                                 // Someone is welcome to try refactoring though
1411                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
1412                                 return false;
1413                         }
1414
1415                         if ( $this->section != '' && $this->section != 'new' ) {
1416                                 $matches = array();
1417                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
1418                                         preg_match( "/^(=+)(.+)\\1/mi", $this->textbox1, $matches );
1419                                         if ( !empty( $matches[2] ) ) {
1420                                                 global $wgParser;
1421                                                 $this->summary = "/* " .
1422                                                         $wgParser->stripSectionName(trim($matches[2])) .
1423                                                         " */ ";
1424                                         }
1425                                 }
1426                         }
1427
1428                         if ( $this->missingComment ) {
1429                                 $wgOut->wrapWikiMsg( '<div id="mw-missingcommenttext">$1</div>', 'missingcommenttext' );
1430                         }
1431
1432                         if ( $this->missingSummary && $this->section != 'new' ) {
1433                                 $wgOut->wrapWikiMsg( '<div id="mw-missingsummary">$1</div>', 'missingsummary' );
1434                         }
1435
1436                         if ( $this->missingSummary && $this->section == 'new' ) {
1437                                 $wgOut->wrapWikiMsg( '<div id="mw-missingcommentheader">$1</div>', 'missingcommentheader' );
1438                         }
1439
1440                         if ( $this->hookError !== '' ) {
1441                                 $wgOut->addWikiText( $this->hookError );
1442                         }
1443
1444                         if ( !$this->checkUnicodeCompliantBrowser() ) {
1445                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
1446                         }
1447
1448                         if ( isset( $this->mArticle ) && isset( $this->mArticle->mRevision ) ) {
1449                         // Let sysop know that this will make private content public if saved
1450
1451                                 if ( !$this->mArticle->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1452                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n", 'rev-deleted-text-permission' );
1453                                 } else if ( $this->mArticle->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1454                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n", 'rev-deleted-text-view' );
1455                                 }
1456
1457                                 if ( !$this->mArticle->mRevision->isCurrent() ) {
1458                                         $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
1459                                         $wgOut->addWikiMsg( 'editingold' );
1460                                 }
1461                         }
1462                 }
1463
1464                 if ( wfReadOnly() ) {
1465                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
1466                 } elseif ( $wgUser->isAnon() && $this->formtype != 'preview' ) {
1467                         $wgOut->wrapWikiMsg( '<div id="mw-anon-edit-warning">$1</div>', 'anoneditwarning' );
1468                 } else {
1469                         if ( $this->isCssJsSubpage ) {
1470                                 # Check the skin exists
1471                                 if ( !$this->isValidCssJsSubpage ) {
1472                                         $wgOut->addWikiMsg( 'userinvalidcssjstitle', $wgTitle->getSkinFromCssJsSubpage() );
1473                                 }
1474                                 if ( $this->formtype !== 'preview' ) {
1475                                         if ( $this->isCssSubpage )
1476                                                 $wgOut->addWikiMsg( 'usercssyoucanpreview' );
1477                                         if ( $this->isJsSubpage )
1478                                                 $wgOut->addWikiMsg( 'userjsyoucanpreview' );
1479                                 }
1480                         }
1481                 }
1482
1483                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
1484                         # Is the title semi-protected?
1485                         if ( $this->mTitle->isSemiProtected() ) {
1486                                 $noticeMsg = 'semiprotectedpagewarning';
1487                         } else {
1488                                 # Then it must be protected based on static groups (regular)
1489                                 $noticeMsg = 'protectedpagewarning';
1490                         }
1491                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle->getPrefixedText(), '',
1492                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
1493                 }
1494                 if ( $this->mTitle->isCascadeProtected() ) {
1495                         # Is this page under cascading protection from some source pages?
1496                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
1497                         $notice = "<div class='mw-cascadeprotectedwarning'>$1\n";
1498                         $cascadeSourcesCount = count( $cascadeSources );
1499                         if ( $cascadeSourcesCount > 0 ) {
1500                                 # Explain, and list the titles responsible
1501                                 foreach( $cascadeSources as $page ) {
1502                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
1503                                 }
1504                         }
1505                         $notice .= '</div>';
1506                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
1507                 }
1508                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
1509                         $wgOut->wrapWikiMsg( '<div class="mw-titleprotectedwarning">$1</div>', 'titleprotectedwarning' );
1510                 }
1511
1512                 if ( $this->kblength === false ) {
1513                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1514                 }
1515
1516                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
1517                         $wgOut->addHTML( "<div class='error' id='mw-edit-longpageerror'>\n" );
1518                         $wgOut->addWikiMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) );
1519                         $wgOut->addHTML( "</div>\n" );
1520                 } elseif ( $this->kblength > 29 ) {
1521                         $wgOut->addHTML( "<div id='mw-edit-longpagewarning'>\n" );
1522                         $wgOut->addWikiMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) );
1523                         $wgOut->addHTML( "</div>\n" );
1524                 }
1525         }
1526
1527         /**
1528          * Standard summary input and label (wgSummary), abstracted so EditPage
1529          * subclasses may reorganize the form.
1530          * Note that you do not need to worry about the label's for=, it will be
1531          * inferred by the id given to the input. You can remove them both by
1532          * passing array( 'id' => false ) to $userInputAttrs.
1533          *
1534          * @param $summary The value of the summary input
1535          * @param $labelText The html to place inside the label
1536          * @param $userInputAttrs An array of attrs to use on the input
1537          * @param $userSpanAttrs An array of attrs to use on the span inside the label
1538          *
1539          * @return array An array in the format array( $label, $input )
1540          */
1541         function getSummaryInput($summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null) {
1542                 $inputAttrs = ( is_array($inputAttrs) ? $inputAttrs : array() ) + array(
1543                         'id' => 'wpSummary',
1544                         'maxlength' => '200',
1545                         'tabindex' => '1',
1546                         'size' => 60,
1547                         'spellcheck' => 'true',
1548                 );
1549
1550                 $spanLabelAttrs = ( is_array($spanLabelAttrs) ? $spanLabelAttrs : array() ) + array(
1551                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
1552                         'id' => "wpSummaryLabel"
1553                 );
1554
1555                 $label = null;
1556                 if ( $labelText ) {
1557                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
1558                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
1559                 }
1560
1561                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
1562
1563                 return array( $label, $input );
1564         }
1565
1566         /**
1567          * @param bool $isSubjectPreview true if this is the section subject/title
1568          *                               up top, or false if this is the comment
1569          *                               summary down below the textarea
1570          * @param string $summary The text of the summary to display
1571          * @return string
1572          */
1573         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
1574                 global $wgOut, $wgContLang;
1575                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
1576                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
1577                 if ( $isSubjectPreview ) {
1578                         if ( $this->nosummary )
1579                                 return;
1580                 } else {
1581                         if ( !$this->mShowSummaryField )
1582                                 return;
1583                 }
1584                 $summary = $wgContLang->recodeForEdit( $summary );
1585                 $labelText = wfMsgExt( $isSubjectPreview ? 'subject' : 'summary', 'parseinline' );
1586                 list($label, $input) = $this->getSummaryInput($summary, $labelText, array( 'class' => $summaryClass ), array());
1587                 $wgOut->addHTML("{$label} {$input}");
1588         }
1589
1590         /**
1591          * @param bool $isSubjectPreview true if this is the section subject/title
1592          *                               up top, or false if this is the comment
1593          *                               summary down below the textarea
1594          * @param string $summary The text of the summary to display
1595          * @return string
1596          */
1597         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
1598                 if ( !$summary || ( !$this->preview && !$this->diff ) )
1599                         return "";
1600
1601                 global $wgParser, $wgUser;
1602                 $sk = $wgUser->getSkin();
1603
1604                 if ( $isSubjectPreview )
1605                         $summary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $summary ) );
1606
1607                 $summary = wfMsgExt( 'subject-preview', 'parseinline' ) . $sk->commentBlock( $summary, $this->mTitle, !!$isSubjectPreview );
1608                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
1609         }
1610
1611         protected function showFormBeforeText() {
1612                 global $wgOut;
1613                 $section = htmlspecialchars( $this->section );
1614                 $wgOut->addHTML( <<<INPUTS
1615 <input type='hidden' value="{$section}" name="wpSection" />
1616 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
1617 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
1618 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
1619
1620 INPUTS
1621                 );
1622                 if ( !$this->checkUnicodeCompliantBrowser() )
1623                         $wgOut->addHTML(Xml::hidden( 'safemode', '1' ));
1624         }
1625
1626         protected function showFormAfterText() {
1627                 global $wgOut, $wgUser;
1628                 /**
1629                  * To make it harder for someone to slip a user a page
1630                  * which submits an edit form to the wiki without their
1631                  * knowledge, a random token is associated with the login
1632                  * session. If it's not passed back with the submission,
1633                  * we won't save the page, or render user JavaScript and
1634                  * CSS previews.
1635                  *
1636                  * For anon editors, who may not have a session, we just
1637                  * include the constant suffix to prevent editing from
1638                  * broken text-mangling proxies.
1639                  */
1640                 $wgOut->addHTML( "\n" . Xml::hidden( "wpEditToken", $wgUser->editToken() ) . "\n" );
1641         }
1642
1643         /**
1644          * Subpage overridable method for printing the form for page content editing
1645          * By default this simply outputs wpTextbox1
1646          * Subclasses can override this to provide a custom UI for editing;
1647          * be it a form, or simply wpTextbox1 with a modified content that will be
1648          * reverse modified when extracted from the post data.
1649          * Note that this is basically the inverse for importContentFormData
1650          *
1651          * @praram WebRequest $request
1652          */
1653         protected function showContentForm() {
1654                 $this->showTextbox1();
1655         }
1656
1657         /**
1658          * Method to output wpTextbox1
1659          * The $textoverride method can be used by subclasses overriding showContentForm
1660          * to pass back to this method.
1661          *
1662          * @param array $customAttribs An array of html attributes to use in the textarea
1663          * @param string $textoverride Optional text to override $this->textarea1 with
1664          */
1665         protected function showTextbox1($customAttribs = null, $textoverride = null) {
1666                 $classes = array(); // Textarea CSS
1667                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
1668                         # Is the title semi-protected?
1669                         if ( $this->mTitle->isSemiProtected() ) {
1670                                 $classes[] = 'mw-textarea-sprotected';
1671                         } else {
1672                                 # Then it must be protected based on static groups (regular)
1673                                 $classes[] = 'mw-textarea-protected';
1674                         }
1675                 }
1676                 $attribs = array( 'tabindex' => 1 );
1677                 if ( is_array($customAttribs) )
1678                         $attribs += $customAttribs;
1679
1680                 if ( $this->wasDeletedSinceLastEdit() )
1681                         $attribs['type'] = 'hidden';
1682                 if ( !empty( $classes ) ) {
1683                         if ( isset($attribs['class']) )
1684                                 $classes[] = $attribs['class'];
1685                         $attribs['class'] = implode( ' ', $classes );
1686                 }
1687
1688                 # Set focus to the edit box on load, except on preview or diff, where it would interfere with the display
1689                 if ( !$this->preview && !$this->diff ) {
1690                         global $wgOut;
1691                         $wgOut->setOnloadHandler( 'document.editform.wpTextbox1.focus();' );
1692                 }
1693
1694                 $this->showTextbox( isset($textoverride) ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
1695         }
1696
1697         protected function showTextbox2() {
1698                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6 ) );
1699         }
1700
1701         protected function showTextbox( $content, $name, $customAttribs = array() ) {
1702                 global $wgOut, $wgUser;
1703
1704                 $wikitext = $this->safeUnicodeOutput( $content );
1705                 if ( $wikitext !== '' ) {
1706                         // Ensure there's a newline at the end, otherwise adding lines
1707                         // is awkward.
1708                         // But don't add a newline if the ext is empty, or Firefox in XHTML
1709                         // mode will show an extra newline. A bit annoying.
1710                         $wikitext .= "\n";
1711                 }
1712
1713                 $attribs = $customAttribs + array(
1714                         'accesskey' => ',',
1715                         'id'   => $name,
1716                         'cols' => $wgUser->getIntOption( 'cols' ),
1717                         'rows' => $wgUser->getIntOption( 'rows' ),
1718                         'style' => '' // avoid php notices when appending for editwidth preference (appending allows customAttribs['style'] to still work
1719                 );
1720
1721                 if ( $wgUser->getOption( 'editwidth' ) )
1722                         $attribs['style'] .= 'width: 100%';
1723
1724                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
1725         }
1726
1727         protected function showMetaData() {
1728                 global $wgOut, $wgContLang, $wgUser;
1729                 $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $this->mMetaData ) );
1730                 $ew = $wgUser->getOption( 'editwidth' ) ? ' style="width:100%"' : '';
1731                 $cols = $wgUser->getIntOption( 'cols' );
1732                 $metadata = wfMsgWikiHtml( 'metadata_help' ) . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
1733                 $wgOut->addHTML( $metadata );
1734         }
1735
1736         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
1737                 global $wgOut;
1738                 $classes = array();
1739                 if ( $isOnTop )
1740                         $classes[] = 'ontop';
1741
1742                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
1743
1744                 if ( $this->formtype != 'preview' )
1745                         $attribs['style'] = 'display: none;';
1746
1747                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
1748
1749                 if ( $this->formtype == 'preview' ) {
1750                         $this->showPreview( $previewOutput );
1751                 }
1752
1753                 $wgOut->addHTML( '</div>' );
1754
1755                 if ( $this->formtype == 'diff') {
1756                         $this->showDiff();
1757                 }
1758         }
1759
1760         /**
1761          * Append preview output to $wgOut.
1762          * Includes category rendering if this is a category page.
1763          *
1764          * @param string $text The HTML to be output for the preview.
1765          */
1766         protected function showPreview( $text ) {
1767                 global $wgOut;
1768                 if ( $this->mTitle->getNamespace() == NS_CATEGORY) {
1769                         $this->mArticle->openShowCategory();
1770                 }
1771                 # This hook seems slightly odd here, but makes things more
1772                 # consistent for extensions.
1773                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
1774                 $wgOut->addHTML( $text );
1775                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
1776                         $this->mArticle->closeShowCategory();
1777                 }
1778         }
1779
1780         protected function showTosSummary() {
1781                 $msg = 'editpage-tos-summary';
1782                 // Give a chance for site and per-namespace customizations of
1783                 // terms of service summary link that might exist separately
1784                 // from the copyright notice.
1785                 //
1786                 // This will display between the save button and the edit tools,
1787                 // so should remain short!
1788                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
1789                 $text = wfMsg( $msg );
1790                 if( !wfEmptyMsg( $msg, $text ) && $text !== '-' ) {
1791                         global $wgOut;
1792                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
1793                         $wgOut->addWikiMsgArray( $msg, array() );
1794                         $wgOut->addHTML( '</div>' );
1795                 }
1796         }
1797
1798         protected function showEditTools() {
1799                 global $wgOut;
1800                 $wgOut->addHTML( '<div class="mw-editTools">' );
1801                 $wgOut->addWikiMsgArray( 'edittools', array(), array( 'content' ) );
1802                 $wgOut->addHTML( '</div>' );
1803         }
1804
1805         protected function getCopywarn() {
1806                 global $wgRightsText;
1807                 if ( $wgRightsText ) {
1808                         $copywarnMsg = array( 'copyrightwarning',
1809                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
1810                                 $wgRightsText );
1811                 } else {
1812                         $copywarnMsg = array( 'copyrightwarning2',
1813                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
1814                 }
1815                 // Allow for site and per-namespace customization of contribution/copyright notice.
1816                 wfRunHooks( 'EditPageCopyrightWarning', array( $this->mTitle, &$copywarnMsg ) );
1817
1818                 return "<div id=\"editpage-copywarn\">\n" . call_user_func_array("wfMsgNoTrans", $copywarnMsg) . "\n</div>";
1819         }
1820
1821         protected function showStandardInputs( &$tabindex = 2 ) {
1822                 global $wgOut, $wgUser;
1823                 $wgOut->addHTML( "<div class='editOptions'>\n" );
1824
1825                 if ( $this->section != 'new' ) {
1826                         $this->showSummaryInput( false, $this->summary );
1827                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
1828                 }
1829
1830                 $checkboxes = $this->getCheckboxes( $tabindex, $wgUser->getSkin(),
1831                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
1832                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
1833                 $wgOut->addHTML( "<div class='editButtons'>\n" );
1834                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
1835
1836                 $cancel = $this->getCancelLink();
1837                 $separator = wfMsgExt( 'pipe-separator' , 'escapenoentities' );
1838                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ) );
1839                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
1840                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
1841                         htmlspecialchars( wfMsg( 'newwindow' ) );
1842                 $wgOut->addHTML( "      <span class='editHelp'>{$cancel}{$separator}{$edithelp}</span>\n" );
1843                 $wgOut->addHTML( "</div><!-- editButtons -->\n</div><!-- editOptions -->\n" );
1844         }
1845
1846         protected function showConflict() {
1847                 global $wgOut;
1848                 $this->textbox2 = $this->textbox1;
1849                 $this->textbox1 = $this->getContent();
1850                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
1851                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
1852
1853                         $de = new DifferenceEngine( $this->mTitle );
1854                         $de->setText( $this->textbox2, $this->textbox1 );
1855                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1856
1857                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
1858                         $this->showTextbox2();
1859                 }
1860         }
1861
1862         protected function getLastDelete() {
1863                 $dbr = wfGetDB( DB_SLAVE );
1864                 $data = $dbr->selectRow(
1865                         array( 'logging', 'user' ),
1866                         array( 'log_type',
1867                                'log_action',
1868                                'log_timestamp',
1869                                'log_user',
1870                                'log_namespace',
1871                                'log_title',
1872                                'log_comment',
1873                                'log_params',
1874                                'log_deleted',
1875                                'user_name' ),
1876                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1877                                'log_title' => $this->mTitle->getDBkey(),
1878                                'log_type' => 'delete',
1879                                'log_action' => 'delete',
1880                                'user_id=log_user' ),
1881                         __METHOD__,
1882                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
1883                 );
1884                 // Quick paranoid permission checks...
1885                 if( is_object( $data ) ) {
1886                         if( $data->log_deleted & LogPage::DELETED_USER )
1887                                 $data->user_name = wfMsgHtml( 'rev-deleted-user' );
1888                         if( $data->log_deleted & LogPage::DELETED_COMMENT )
1889                                 $data->log_comment = wfMsgHtml( 'rev-deleted-comment' );
1890                 }
1891                 return $data;
1892         }
1893
1894         /**
1895          * Get the rendered text for previewing.
1896          * @return string
1897          */
1898         function getPreviewText() {
1899                 global $wgOut, $wgUser, $wgTitle, $wgParser, $wgLang, $wgContLang, $wgMessageCache;
1900
1901                 wfProfileIn( __METHOD__ );
1902
1903                 if ( $this->mTriedSave && !$this->mTokenOk ) {
1904                         if ( $this->mTokenOkExceptSuffix ) {
1905                                 $note = wfMsg( 'token_suffix_mismatch' );
1906                         } else {
1907                                 $note = wfMsg( 'session_fail_preview' );
1908                         }
1909                 } else {
1910                         $note = wfMsg( 'previewnote' );
1911                 }
1912
1913                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1914                 $parserOptions->setEditSection( false );
1915                 $parserOptions->setIsPreview( true );
1916                 $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
1917
1918                 global $wgRawHtml;
1919                 if ( $wgRawHtml && !$this->mTokenOk ) {
1920                         // Could be an offsite preview attempt. This is very unsafe if
1921                         // HTML is enabled, as it could be an attack.
1922                         return $wgOut->parse( "<div class='previewnote'>" .
1923                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1924                 }
1925
1926                 # don't parse user css/js, show message about preview
1927                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1928
1929                 if ( $this->isCssJsSubpage ) {
1930                         if (preg_match( "/\\.css$/", $this->mTitle->getText() ) ) {
1931                                 $previewtext = wfMsg( 'usercsspreview' );
1932                         } else if (preg_match( "/\\.js$/", $this->mTitle->getText() ) ) {
1933                                 $previewtext = wfMsg( 'userjspreview' );
1934                         }
1935                         $parserOptions->setTidy( true );
1936                         $parserOutput = $wgParser->parse( $previewtext, $this->mTitle, $parserOptions );
1937                         $previewHTML = $parserOutput->mText;
1938                 } elseif ( $rt = Title::newFromRedirectArray( $this->textbox1 ) ) {
1939                         $previewHTML = $this->mArticle->viewRedirect( $rt, false );
1940                 } else {
1941                         $toparse = $this->textbox1;
1942
1943                         # If we're adding a comment, we need to show the
1944                         # summary as the headline
1945                         if ( $this->section == "new" && $this->summary != "" ) {
1946                                 $toparse="== {$this->summary} ==\n\n" . $toparse;
1947                         }
1948
1949                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData;
1950
1951                         // Parse mediawiki messages with correct target language
1952                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1953                                 list( /* $unused */, $lang ) = $wgMessageCache->figureMessage( $this->mTitle->getText() );
1954                                 $obj = wfGetLangObj( $lang );
1955                                 $parserOptions->setTargetLanguage( $obj );
1956                         }
1957
1958
1959                         $parserOptions->setTidy( true );
1960                         $parserOptions->enableLimitReport();
1961                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ),
1962                                         $this->mTitle, $parserOptions );
1963
1964                         $previewHTML = $parserOutput->getText();
1965                         $this->mParserOutput = $parserOutput;
1966                         $wgOut->addParserOutputNoText( $parserOutput );
1967
1968                         if ( count( $parserOutput->getWarnings() ) ) {
1969                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
1970                         }
1971                 }
1972
1973                 if( $this->isConflict ) {
1974                         $conflict = '<h2 id="mw-previewconflict">' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1975                 } else {
1976                         $conflict = '<hr />';
1977                 }
1978
1979                 $previewhead = "<div class='previewnote'>\n" .
1980                         '<h2 id="mw-previewheader">' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>" .
1981                         $wgOut->parse( $note ) . $conflict . "</div>\n";
1982
1983                 wfProfileOut( __METHOD__ );
1984                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
1985         }
1986
1987         function getTemplates() {
1988                 if ( $this->preview || $this->section != '' ) {
1989                         $templates = array();
1990                         if ( !isset( $this->mParserOutput ) ) return $templates;
1991                         foreach( $this->mParserOutput->getTemplates() as $ns => $template) {
1992                                 foreach( array_keys( $template ) as $dbk ) {
1993                                         $templates[] = Title::makeTitle($ns, $dbk);
1994                                 }
1995                         }
1996                         return $templates;
1997                 } else {
1998                         return $this->mArticle->getUsedTemplates();
1999                 }
2000         }
2001
2002         /**
2003          * Call the stock "user is blocked" page
2004          */
2005         function blockedPage() {
2006                 global $wgOut;
2007                 $wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
2008
2009                 # If the user made changes, preserve them when showing the markup
2010                 # (This happens when a user is blocked during edit, for instance)
2011                 $first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
2012                 if ( $first ) {
2013                         $source = $this->mTitle->exists() ? $this->getContent() : false;
2014                 } else {
2015                         $source = $this->textbox1;
2016                 }
2017
2018                 # Spit out the source or the user's modified version
2019                 if ( $source !== false ) {
2020                         $wgOut->addHTML( '<hr />' );
2021                         $wgOut->addWikiMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() );
2022                         $this->showTextbox1( array( 'readonly' ), $source );
2023                 }
2024         }
2025
2026         /**
2027          * Produce the stock "please login to edit pages" page
2028          */
2029         function userNotLoggedInPage() {
2030                 global $wgUser, $wgOut, $wgTitle;
2031                 $skin = $wgUser->getSkin();
2032
2033                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
2034                 $loginLink = $skin->link(
2035                         $loginTitle,
2036                         wfMsgHtml( 'loginreqlink' ),
2037                         array(),
2038                         array( 'returnto' => $wgTitle->getPrefixedText() ),
2039                         array( 'known', 'noclasses' )
2040                 );
2041
2042                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
2043                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2044                 $wgOut->setArticleRelated( false );
2045
2046                 $wgOut->addHTML( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
2047                 $wgOut->returnToMain( false, $wgTitle );
2048         }
2049
2050         /**
2051          * Creates a basic error page which informs the user that
2052          * they have attempted to edit a nonexistent section.
2053          */
2054         function noSuchSectionPage() {
2055                 global $wgOut, $wgTitle;
2056
2057                 $wgOut->setPageTitle( wfMsg( 'nosuchsectiontitle' ) );
2058                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2059                 $wgOut->setArticleRelated( false );
2060
2061                 $wgOut->addWikiMsg( 'nosuchsectiontext', $this->section );
2062                 $wgOut->returnToMain( false, $wgTitle );
2063         }
2064
2065         /**
2066          * Produce the stock "your edit contains spam" page
2067          *
2068          * @param $match Text which triggered one or more filters
2069          */
2070         function spamPage( $match = false ) {
2071                 global $wgOut, $wgTitle;
2072
2073                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
2074                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2075                 $wgOut->setArticleRelated( false );
2076
2077                 $wgOut->addHTML( '<div id="spamprotected">' );
2078                 $wgOut->addWikiMsg( 'spamprotectiontext' );
2079                 if ( $match )
2080                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
2081                 $wgOut->addHTML( '</div>' );
2082
2083                 $wgOut->returnToMain( false, $wgTitle );
2084         }
2085
2086         /**
2087          * @private
2088          * @todo document
2089          */
2090         function mergeChangesInto( &$editText ){
2091                 wfProfileIn( __METHOD__ );
2092
2093                 $db = wfGetDB( DB_MASTER );
2094
2095                 // This is the revision the editor started from
2096                 $baseRevision = $this->getBaseRevision();
2097                 if ( is_null( $baseRevision ) ) {
2098                         wfProfileOut( __METHOD__ );
2099                         return false;
2100                 }
2101                 $baseText = $baseRevision->getText();
2102
2103                 // The current state, we want to merge updates into it
2104                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2105                 if ( is_null( $currentRevision ) ) {
2106                         wfProfileOut( __METHOD__ );
2107                         return false;
2108                 }
2109                 $currentText = $currentRevision->getText();
2110
2111                 $result = '';
2112                 if ( wfMerge( $baseText, $editText, $currentText, $result ) ) {
2113                         $editText = $result;
2114                         wfProfileOut( __METHOD__ );
2115                         return true;
2116                 } else {
2117                         wfProfileOut( __METHOD__ );
2118                         return false;
2119                 }
2120         }
2121
2122         /**
2123          * Check if the browser is on a blacklist of user-agents known to
2124          * mangle UTF-8 data on form submission. Returns true if Unicode
2125          * should make it through, false if it's known to be a problem.
2126          * @return bool
2127          * @private
2128          */
2129         function checkUnicodeCompliantBrowser() {
2130                 global $wgBrowserBlackList;
2131                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
2132                         // No User-Agent header sent? Trust it by default...
2133                         return true;
2134                 }
2135                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
2136                 foreach ( $wgBrowserBlackList as $browser ) {
2137                         if ( preg_match($browser, $currentbrowser) ) {
2138                                 return false;
2139                         }
2140                 }
2141                 return true;
2142         }
2143
2144         /**
2145          * @deprecated use $wgParser->stripSectionName()
2146          */
2147         function pseudoParseSectionAnchor( $text ) {
2148                 global $wgParser;
2149                 return $wgParser->stripSectionName( $text );
2150         }
2151
2152         /**
2153          * Format an anchor fragment as it would appear for a given section name
2154          * @param string $text
2155          * @return string
2156          * @private
2157          */
2158         function sectionAnchor( $text ) {
2159                 global $wgParser;
2160                 return $wgParser->guessSectionNameFromWikiText( $text );
2161         }
2162
2163         /**
2164          * Shows a bulletin board style toolbar for common editing functions.
2165          * It can be disabled in the user preferences.
2166          * The necessary JavaScript code can be found in skins/common/edit.js.
2167          *
2168          * @return string
2169          */
2170         static function getEditToolbar() {
2171                 global $wgStylePath, $wgContLang, $wgLang;
2172
2173                 /**
2174
2175                  * toolarray an array of arrays which each include the filename of
2176                  * the button image (without path), the opening tag, the closing tag,
2177                  * and optionally a sample text that is inserted between the two when no
2178                  * selection is highlighted.
2179                  * The tip text is shown when the user moves the mouse over the button.
2180                  *
2181                  * Already here are accesskeys (key), which are not used yet until someone
2182                  * can figure out a way to make them work in IE. However, we should make
2183                  * sure these keys are not defined on the edit page.
2184                  */
2185                 $toolarray = array(
2186                         array(
2187                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
2188                                 'id'     => 'mw-editbutton-bold',
2189                                 'open'   => '\'\'\'',
2190                                 'close'  => '\'\'\'',
2191                                 'sample' => wfMsg( 'bold_sample' ),
2192                                 'tip'    => wfMsg( 'bold_tip' ),
2193                                 'key'    => 'B'
2194                         ),
2195                         array(
2196                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
2197                                 'id'     => 'mw-editbutton-italic',
2198                                 'open'   => '\'\'',
2199                                 'close'  => '\'\'',
2200                                 'sample' => wfMsg( 'italic_sample' ),
2201                                 'tip'    => wfMsg( 'italic_tip' ),
2202                                 'key'    => 'I'
2203                         ),
2204                         array(
2205                                 'image'  => $wgLang->getImageFile( 'button-link' ),
2206                                 'id'     => 'mw-editbutton-link',
2207                                 'open'   => '[[',
2208                                 'close'  => ']]',
2209                                 'sample' => wfMsg( 'link_sample' ),
2210                                 'tip'    => wfMsg( 'link_tip' ),
2211                                 'key'    => 'L'
2212                         ),
2213                         array(
2214                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
2215                                 'id'     => 'mw-editbutton-extlink',
2216                                 'open'   => '[',
2217                                 'close'  => ']',
2218                                 'sample' => wfMsg( 'extlink_sample' ),
2219                                 'tip'    => wfMsg( 'extlink_tip' ),
2220                                 'key'    => 'X'
2221                         ),
2222                         array(
2223                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
2224                                 'id'     => 'mw-editbutton-headline',
2225                                 'open'   => "\n== ",
2226                                 'close'  => " ==\n",
2227                                 'sample' => wfMsg( 'headline_sample' ),
2228                                 'tip'    => wfMsg( 'headline_tip' ),
2229                                 'key'    => 'H'
2230                         ),
2231                         array(
2232                                 'image'  => $wgLang->getImageFile( 'button-image' ),
2233                                 'id'     => 'mw-editbutton-image',
2234                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
2235                                 'close'  => ']]',
2236                                 'sample' => wfMsg( 'image_sample' ),
2237                                 'tip'    => wfMsg( 'image_tip' ),
2238                                 'key'    => 'D'
2239                         ),
2240                         array(
2241                                 'image'  => $wgLang->getImageFile( 'button-media' ),
2242                                 'id'     => 'mw-editbutton-media',
2243                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
2244                                 'close'  => ']]',
2245                                 'sample' => wfMsg( 'media_sample' ),
2246                                 'tip'    => wfMsg( 'media_tip' ),
2247                                 'key'    => 'M'
2248                         ),
2249                         array(
2250                                 'image'  => $wgLang->getImageFile( 'button-math' ),
2251                                 'id'     => 'mw-editbutton-math',
2252                                 'open'   => "<math>",
2253                                 'close'  => "</math>",
2254                                 'sample' => wfMsg( 'math_sample' ),
2255                                 'tip'    => wfMsg( 'math_tip' ),
2256                                 'key'    => 'C'
2257                         ),
2258                         array(
2259                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
2260                                 'id'     => 'mw-editbutton-nowiki',
2261                                 'open'   => "<nowiki>",
2262                                 'close'  => "</nowiki>",
2263                                 'sample' => wfMsg( 'nowiki_sample' ),
2264                                 'tip'    => wfMsg( 'nowiki_tip' ),
2265                                 'key'    => 'N'
2266                         ),
2267                         array(
2268                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
2269                                 'id'     => 'mw-editbutton-signature',
2270                                 'open'   => '--~~~~',
2271                                 'close'  => '',
2272                                 'sample' => '',
2273                                 'tip'    => wfMsg( 'sig_tip' ),
2274                                 'key'    => 'Y'
2275                         ),
2276                         array(
2277                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
2278                                 'id'     => 'mw-editbutton-hr',
2279                                 'open'   => "\n----\n",
2280                                 'close'  => '',
2281                                 'sample' => '',
2282                                 'tip'    => wfMsg( 'hr_tip' ),
2283                                 'key'    => 'R'
2284                         )
2285                 );
2286                 $toolbar = "<div id='toolbar'>\n";
2287
2288                 $script = '';
2289                 foreach ( $toolarray as $tool ) {
2290                         $params = array(
2291                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
2292                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
2293                                 // Older browsers show a "speedtip" type message only for ALT.
2294                                 // Ideally these should be different, realistically they
2295                                 // probably don't need to be.
2296                                 $tip = $tool['tip'],
2297                                 $open = $tool['open'],
2298                                 $close = $tool['close'],
2299                                 $sample = $tool['sample'],
2300                                 $cssId = $tool['id'],
2301                         );
2302
2303                         $paramList = implode( ',',
2304                                 array_map( array( 'Xml', 'encodeJsVar' ), $params ) );
2305                         $script .= "addButton($paramList);\n";
2306                 }
2307                 $toolbar .= Html::inlineScript( "\n$script\n" );
2308
2309                 $toolbar .= "\n</div>";
2310
2311                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
2312
2313                 return $toolbar;
2314         }
2315
2316         /**
2317          * Returns an array of html code of the following checkboxes:
2318          * minor and watch
2319          *
2320          * @param $tabindex Current tabindex
2321          * @param $skin Skin object
2322          * @param $checked Array of checkbox => bool, where bool indicates the checked
2323          *                 status of the checkbox
2324          *
2325          * @return array
2326          */
2327         public function getCheckboxes( &$tabindex, $skin, $checked ) {
2328                 global $wgUser;
2329
2330                 $checkboxes = array();
2331
2332                 $checkboxes['minor'] = '';
2333                 $minorLabel = wfMsgExt( 'minoredit', array( 'parseinline' ) );
2334                 if ( $wgUser->isAllowed( 'minoredit' ) ) {
2335                         $attribs = array(
2336                                 'tabindex'  => ++$tabindex,
2337                                 'accesskey' => wfMsg( 'accesskey-minoredit' ),
2338                                 'id'        => 'wpMinoredit',
2339                         );
2340                         $checkboxes['minor'] =
2341                                 Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
2342                                 "&nbsp;<label for='wpMinoredit'" . $skin->tooltip( 'minoredit', 'withaccess' ) . ">{$minorLabel}</label>";
2343                 }
2344
2345                 $watchLabel = wfMsgExt( 'watchthis', array( 'parseinline' ) );
2346                 $checkboxes['watch'] = '';
2347                 if ( $wgUser->isLoggedIn() ) {
2348                         $attribs = array(
2349                                 'tabindex'  => ++$tabindex,
2350                                 'accesskey' => wfMsg( 'accesskey-watch' ),
2351                                 'id'        => 'wpWatchthis',
2352                         );
2353                         $checkboxes['watch'] =
2354                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
2355                                 "&nbsp;<label for='wpWatchthis'" . $skin->tooltip( 'watch', 'withaccess' ) . ">{$watchLabel}</label>";
2356                 }
2357                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
2358                 return $checkboxes;
2359         }
2360
2361         /**
2362          * Returns an array of html code of the following buttons:
2363          * save, diff, preview and live
2364          *
2365          * @param $tabindex Current tabindex
2366          *
2367          * @return array
2368          */
2369         public function getEditButtons(&$tabindex) {
2370                 $buttons = array();
2371
2372                 $temp = array(
2373                         'id'        => 'wpSave',
2374                         'name'      => 'wpSave',
2375                         'type'      => 'submit',
2376                         'tabindex'  => ++$tabindex,
2377                         'value'     => wfMsg( 'savearticle' ),
2378                         'accesskey' => wfMsg( 'accesskey-save' ),
2379                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
2380                 );
2381                 $buttons['save'] = Xml::element('input', $temp, '');
2382
2383                 ++$tabindex; // use the same for preview and live preview
2384                 $temp = array(
2385                         'id'        => 'wpPreview',
2386                         'name'      => 'wpPreview',
2387                         'type'      => 'submit',
2388                         'tabindex'  => $tabindex,
2389                         'value'     => wfMsg( 'showpreview' ),
2390                         'accesskey' => wfMsg( 'accesskey-preview' ),
2391                         'title'     => wfMsg( 'tooltip-preview' ) . ' [' . wfMsg( 'accesskey-preview' ) . ']',
2392                 );
2393                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
2394                 $buttons['live'] = '';
2395
2396                 $temp = array(
2397                         'id'        => 'wpDiff',
2398                         'name'      => 'wpDiff',
2399                         'type'      => 'submit',
2400                         'tabindex'  => ++$tabindex,
2401                         'value'     => wfMsg( 'showdiff' ),
2402                         'accesskey' => wfMsg( 'accesskey-diff' ),
2403                         'title'     => wfMsg( 'tooltip-diff' ) . ' [' . wfMsg( 'accesskey-diff' ) . ']',
2404                 );
2405                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
2406
2407                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
2408                 return $buttons;
2409         }
2410
2411         /**
2412          * Output preview text only. This can be sucked into the edit page
2413          * via JavaScript, and saves the server time rendering the skin as
2414          * well as theoretically being more robust on the client (doesn't
2415          * disturb the edit box's undo history, won't eat your text on
2416          * failure, etc).
2417          *
2418          * @todo This doesn't include category or interlanguage links.
2419          *       Would need to enhance it a bit, <s>maybe wrap them in XML
2420          *       or something...</s> that might also require more skin
2421          *       initialization, so check whether that's a problem.
2422          */
2423         function livePreview() {
2424                 global $wgOut;
2425                 $wgOut->disable();
2426                 header( 'Content-type: text/xml; charset=utf-8' );
2427                 header( 'Cache-control: no-cache' );
2428
2429                 $previewText = $this->getPreviewText();
2430                 #$categories = $skin->getCategoryLinks();
2431
2432                 $s =
2433                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
2434                 Xml::tags( 'livepreview', null,
2435                         Xml::element( 'preview', null, $previewText )
2436                         #.      Xml::element( 'category', null, $categories )
2437                 );
2438                 echo $s;
2439         }
2440
2441
2442         public function getCancelLink() {
2443                 global $wgUser, $wgTitle;
2444                 $cancelParams = array();
2445                 if ( !$this->isConflict && isset( $this->mArticle ) &&
2446                         isset( $this->mArticle->mRevision ) &&
2447                         !$this->mArticle->mRevision->isCurrent() )
2448                                 $cancelParams['oldid'] = $this->mArticle->mRevision->getId();
2449                 return $wgUser->getSkin()->link(
2450                         $wgTitle,
2451                         wfMsgExt( 'cancel', array( 'parseinline' ) ),
2452                         array( 'id' => 'mw-editform-cancel' ),
2453                         $cancelParams,
2454                         array( 'known', 'noclasses' )
2455                 );
2456         }
2457
2458         /**
2459          * Get a diff between the current contents of the edit box and the
2460          * version of the page we're editing from.
2461          *
2462          * If this is a section edit, we'll replace the section as for final
2463          * save and then make a comparison.
2464          */
2465         function showDiff() {
2466                 $oldtext = $this->mArticle->fetchContent();
2467                 $newtext = $this->mArticle->replaceSection(
2468                         $this->section, $this->textbox1, $this->summary, $this->edittime );
2469                 $newtext = $this->mArticle->preSaveTransform( $newtext );
2470                 $oldtitle = wfMsgExt( 'currentrev', array( 'parseinline' ) );
2471                 $newtitle = wfMsgExt( 'yourtext', array( 'parseinline' ) );
2472                 if ( $oldtext !== false  || $newtext != '' ) {
2473                         $de = new DifferenceEngine( $this->mTitle );
2474                         $de->setText( $oldtext, $newtext );
2475                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2476                         $de->showDiffStyle();
2477                 } else {
2478                         $difftext = '';
2479                 }
2480
2481                 global $wgOut;
2482                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2483         }
2484
2485         /**
2486          * Filter an input field through a Unicode de-armoring process if it
2487          * came from an old browser with known broken Unicode editing issues.
2488          *
2489          * @param WebRequest $request
2490          * @param string $field
2491          * @return string
2492          * @private
2493          */
2494         function safeUnicodeInput( $request, $field ) {
2495                 $text = rtrim( $request->getText( $field ) );
2496                 return $request->getBool( 'safemode' )
2497                         ? $this->unmakesafe( $text )
2498                         : $text;
2499         }
2500
2501         function safeUnicodeText( $request, $text ) {
2502                 $text = rtrim( $text );
2503                 return $request->getBool( 'safemode' )
2504                         ? $this->unmakesafe( $text )
2505                         : $text;
2506         }
2507
2508         /**
2509          * Filter an output field through a Unicode armoring process if it is
2510          * going to an old browser with known broken Unicode editing issues.
2511          *
2512          * @param string $text
2513          * @return string
2514          * @private
2515          */
2516         function safeUnicodeOutput( $text ) {
2517                 global $wgContLang;
2518                 $codedText = $wgContLang->recodeForEdit( $text );
2519                 return $this->checkUnicodeCompliantBrowser()
2520                         ? $codedText
2521                         : $this->makesafe( $codedText );
2522         }
2523
2524         /**
2525          * A number of web browsers are known to corrupt non-ASCII characters
2526          * in a UTF-8 text editing environment. To protect against this,
2527          * detected browsers will be served an armored version of the text,
2528          * with non-ASCII chars converted to numeric HTML character references.
2529          *
2530          * Preexisting such character references will have a 0 added to them
2531          * to ensure that round-trips do not alter the original data.
2532          *
2533          * @param string $invalue
2534          * @return string
2535          * @private
2536          */
2537         function makesafe( $invalue ) {
2538                 // Armor existing references for reversability.
2539                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
2540
2541                 $bytesleft = 0;
2542                 $result = "";
2543                 $working = 0;
2544                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2545                         $bytevalue = ord( $invalue{$i} );
2546                         if ( $bytevalue <= 0x7F ) { //0xxx xxxx
2547                                 $result .= chr( $bytevalue );
2548                                 $bytesleft = 0;
2549                         } elseif ( $bytevalue <= 0xBF ) { //10xx xxxx
2550                                 $working = $working << 6;
2551                                 $working += ($bytevalue & 0x3F);
2552                                 $bytesleft--;
2553                                 if ( $bytesleft <= 0 ) {
2554                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
2555                                 }
2556                         } elseif ( $bytevalue <= 0xDF ) { //110x xxxx
2557                                 $working = $bytevalue & 0x1F;
2558                                 $bytesleft = 1;
2559                         } elseif ( $bytevalue <= 0xEF ) { //1110 xxxx
2560                                 $working = $bytevalue & 0x0F;
2561                                 $bytesleft = 2;
2562                         } else { //1111 0xxx
2563                                 $working = $bytevalue & 0x07;
2564                                 $bytesleft = 3;
2565                         }
2566                 }
2567                 return $result;
2568         }
2569
2570         /**
2571          * Reverse the previously applied transliteration of non-ASCII characters
2572          * back to UTF-8. Used to protect data from corruption by broken web browsers
2573          * as listed in $wgBrowserBlackList.
2574          *
2575          * @param string $invalue
2576          * @return string
2577          * @private
2578          */
2579         function unmakesafe( $invalue ) {
2580                 $result = "";
2581                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2582                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
2583                                 $i += 3;
2584                                 $hexstring = "";
2585                                 do {
2586                                         $hexstring .= $invalue{$i};
2587                                         $i++;
2588                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
2589
2590                                 // Do some sanity checks. These aren't needed for reversability,
2591                                 // but should help keep the breakage down if the editor
2592                                 // breaks one of the entities whilst editing.
2593                                 if ( (substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6) ) {
2594                                         $codepoint = hexdec($hexstring);
2595                                         $result .= codepointToUtf8( $codepoint );
2596                                 } else {
2597                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
2598                                 }
2599                         } else {
2600                                 $result .= substr( $invalue, $i, 1 );
2601                         }
2602                 }
2603                 // reverse the transform that we made for reversability reasons.
2604                 return strtr( $result, array( "&#x0" => "&#x" ) );
2605         }
2606
2607         function noCreatePermission() {
2608                 global $wgOut;
2609                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
2610                 $wgOut->addWikiMsg( 'nocreatetext' );
2611         }
2612
2613         /**
2614          * Attempt submission
2615          * @return bool false if output is done, true if the rest of the form should be displayed
2616          */
2617         function attemptSave() {
2618                 global $wgUser, $wgOut, $wgTitle;
2619
2620                 $resultDetails = false;
2621                 # Allow bots to exempt some edits from bot flagging
2622                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
2623                 $value = $this->internalAttemptSave( $resultDetails, $bot );
2624
2625                 if ( $value == self::AS_SUCCESS_UPDATE || $value == self::AS_SUCCESS_NEW_ARTICLE ) {
2626                         $this->didSave = true;
2627                 }
2628
2629                 switch ( $value ) {
2630                         case self::AS_HOOK_ERROR_EXPECTED:
2631                         case self::AS_CONTENT_TOO_BIG:
2632                         case self::AS_ARTICLE_WAS_DELETED:
2633                         case self::AS_CONFLICT_DETECTED:
2634                         case self::AS_SUMMARY_NEEDED:
2635                         case self::AS_TEXTBOX_EMPTY:
2636                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
2637                         case self::AS_END:
2638                                 return true;
2639
2640                         case self::AS_HOOK_ERROR:
2641                         case self::AS_FILTERING:
2642                         case self::AS_SUCCESS_NEW_ARTICLE:
2643                         case self::AS_SUCCESS_UPDATE:
2644                                 return false;
2645
2646                         case self::AS_SPAM_ERROR:
2647                                 $this->spamPage( $resultDetails['spam'] );
2648                                 return false;
2649
2650                         case self::AS_BLOCKED_PAGE_FOR_USER:
2651                                 $this->blockedPage();
2652                                 return false;
2653
2654                         case self::AS_IMAGE_REDIRECT_ANON:
2655                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
2656                                 return false;
2657
2658                         case self::AS_READ_ONLY_PAGE_ANON:
2659                                 $this->userNotLoggedInPage();
2660                                 return false;
2661
2662                         case self::AS_READ_ONLY_PAGE_LOGGED:
2663                         case self::AS_READ_ONLY_PAGE:
2664                                 $wgOut->readOnlyPage();
2665                                 return false;
2666
2667                         case self::AS_RATE_LIMITED:
2668                                 $wgOut->rateLimited();
2669                                 return false;
2670
2671                         case self::AS_NO_CREATE_PERMISSION:
2672                                 $this->noCreatePermission();
2673                                 return;
2674
2675                         case self::AS_BLANK_ARTICLE:
2676                                 $wgOut->redirect( $wgTitle->getFullURL() );
2677                                 return false;
2678
2679                         case self::AS_IMAGE_REDIRECT_LOGGED:
2680                                 $wgOut->permissionRequired( 'upload' );
2681                                 return false;
2682                 }
2683         }
2684
2685         function getBaseRevision() {
2686                 if ( $this->mBaseRevision == false ) {
2687                         $db = wfGetDB( DB_MASTER );
2688                         $baseRevision = Revision::loadFromTimestamp(
2689                                 $db, $this->mTitle, $this->edittime );
2690                         return $this->mBaseRevision = $baseRevision;
2691                 } else {
2692                         return $this->mBaseRevision;
2693                 }
2694         }
2695 }