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          * @returns mixed string on success, $def_text for invalid sections
 125          * @private
 126          */
 127         function getContent( $def_text = '' ) {
 128                 global $wgOut, $wgRequest, $wgParser, $wgContLang, $wgMessageCache;
 129
 130                 wfProfileIn( __METHOD__ );
 131                 # Get variables from query string :P
 132                 $section = $wgRequest->getVal( 'section' );
 133
 134                 $preload = $wgRequest->getVal( 'preload',
 135                         // Custom preload text for new sections
 136                         $section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 137                 $undoafter = $wgRequest->getVal( 'undoafter' );
 138                 $undo = $wgRequest->getVal( 'undo' );
 139
 140                 $text = '';
 141                 // For message page not locally set, use the i18n message.
 142                 // For other non-existent articles, use preload text if any.
 143                 if ( !$this->mTitle->exists() ) {
 144                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 145                                 # If this is a system message, get the default text.
 146                                 list( $message, $lang ) = $wgMessageCache->figureMessage( $wgContLang->lcfirst( $this->mTitle->getText() ) );
 147                                 $wgMessageCache->loadAllMessages( $lang );
 148                                 $text = wfMsgGetKey( $message, false, $lang, false );
 149                                 if( wfEmptyMsg( $message, $text ) )
 150                                         $text = $this->getPreloadedText( $preload );
 151                         } else {
 152                                 # If requested, preload some text.
 153                                 $text = $this->getPreloadedText( $preload );
 154                         }
 155                 // For existing pages, get text based on "undo" or section parameters.
 156                 } else {
 157                         $text = $this->mArticle->getContent();
 158                         if ( $undo > 0 && $undoafter > 0 && $undo < $undoafter ) {
 159                                 # If they got undoafter and undo round the wrong way, switch them
 160                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 161                         }
 162                         if ( $undo > 0 && $undo > $undoafter ) {
 163                                 # Undoing a specific edit overrides section editing; section-editing
 164                                 # doesn't work with undoing.
 165                                 if ( $undoafter ) {
 166                                         $undorev = Revision::newFromId( $undo );
 167                                         $oldrev = Revision::newFromId( $undoafter );
 168                                 } else {
 169                                         $undorev = Revision::newFromId( $undo );
 170                                         $oldrev = $undorev ? $undorev->getPrevious() : null;
 171                                 }
 172
 173                                 # Sanity check, make sure it's the right page,
 174                                 # the revisions exist and they were not deleted.
 175                                 # Otherwise, $text will be left as-is.
 176                                 if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 177                                         $undorev->getPage() == $oldrev->getPage() &&
 178                                         $undorev->getPage() == $this->mArticle->getID() &&
 179                                         !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 180                                         !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 181
 182                                         $undotext = $this->mArticle->getUndoText( $undorev, $oldrev );
 183                                         if ( $undotext === false ) {
 184                                                 # Warn the user that something went wrong
 185                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-failure">' . wfMsgNoTrans( 'undo-failure' ) . '</div>' );
 186                                         } else {
 187                                                 $text = $undotext;
 188                                                 # Inform the user of our success and set an automatic edit summary
 189                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="mw-undo-success">' . wfMsgNoTrans( 'undo-success' ) . '</div>' );
 190                                                 $firstrev = $oldrev->getNext();
 191                                                 # If we just undid one rev, use an autosummary
 192                                                 if ( $firstrev->mId == $undo ) {
 193                                                         $this->summary = wfMsgForContent( 'undo-summary', $undo, $undorev->getUserText() );
 194                                                         $this->undidRev = $undo;
 195                                                 }
 196                                                 $this->formtype = 'diff';
 197                                         }
 198                                 } else {
 199                                         // Failed basic sanity checks.
 200                                         // Older revisions may have been removed since the link
 201                                         // was created, or we may simply have got bogus input.
 202                                         $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-norev">' . wfMsgNoTrans( 'undo-norev' ) . '</div>' );
 203                                 }
 204                         } else if ( $section != '' ) {
 205                                 if ( $section == 'new' ) {
 206                                         $text = $this->getPreloadedText( $preload );
 207                                 } else {
 208                                         // Get section edit text (returns $def_text for invalid sections)
 209                                         $text = $wgParser->getSection( $text, $section, $def_text );
 210                                 }
 211                         }
 212                 }
 213
 214                 wfProfileOut( __METHOD__ );
 215                 return $text;
 216         }
 217
 218         /** Use this method before edit() to preload some text into the edit box */
 219         public function setPreloadedText( $text ) {
 220                 $this->mPreloadText = $text;
 221         }
 222
 223         /**
 224          * Get the contents of a page from its title and remove includeonly tags
 225          *
 226          * @param $preload String: the title of the page.
 227          * @return string The contents of the page.
 228          */
 229         protected function getPreloadedText( $preload ) {
 230                 global $wgParser, $wgUser;
 231                 if ( !empty( $this->mPreloadText ) ) {
 232                         return $this->mPreloadText;
 233                 } else {
 234                         $preloadTitle = Title::newFromText( $preload );
 235                         if ( isset( $preloadTitle ) && $preloadTitle->userCanRead() ) {
 236                                 return $wgParser->getTransclusionText( $preloadTitle, ParserOptions::newFromUser( $wgUser ) );
 237                         }
 238                 }
 239         }
 240
 241         /**
 242          * This is the function that extracts metadata from the article body on the first view.
 243          * To turn the feature on, set $wgUseMetadataEdit = true ; in LocalSettings
 244          *  and set $wgMetadataWhitelist to the *full* title of the template whitelist
 245          */
 246         function extractMetaDataFromArticle () {
 247                 global $wgUseMetadataEdit, $wgMetadataWhitelist, $wgContLang;
 248                 $this->mMetaData = '';
 249                 if ( !$wgUseMetadataEdit ) return;
 250                 if ( $wgMetadataWhitelist == '' ) return;
 251                 $s = '';
 252                 $t = $this->getContent();
 253
 254                 # MISSING : <nowiki> filtering
 255
 256                 # Categories and language links
 257                 $t = explode( "\n" , $t );
 258                 $catlow = strtolower( $wgContLang->getNsText( NS_CATEGORY ) );
 259                 $cat = $ll = array();
 260                 foreach ( $t as $key => $x ) {
 261                         $y = trim( strtolower ( $x ) );
 262                         while ( substr( $y , 0 , 2 ) == '[[' ) {
 263                                 $y = explode( ']]' , trim ( $x ) );
 264                                 $first = array_shift( $y );
 265                                 $first = explode( ':' , $first );
 266                                 $ns = array_shift( $first );
 267                                 $ns = trim( str_replace( '[' , '' , $ns ) );
 268                                 if ( $wgContLang->getLanguageName( $ns ) || strtolower( $ns ) == $catlow ) {
 269                                         $add = '[[' . $ns . ':' . implode( ':' , $first ) . ']]';
 270                                         if ( strtolower( $ns ) == $catlow ) $cat[] = $add;
 271                                         else $ll[] = $add;
 272                                         $x = implode( ']]', $y );
 273                                         $t[$key] = $x;
 274                                         $y = trim( strtolower( $x ) );
 275                                 } else {
 276                                         $x = implode( ']]' , $y );
 277                                         $y = trim( strtolower( $x ) );
 278                                 }
 279                         }
 280                 }
 281                 if ( count( $cat ) ) $s .= implode( ' ' , $cat ) . "\n";
 282                 if ( count( $ll ) ) $s .= implode( ' ' , $ll ) . "\n";
 283                 $t = implode( "\n" , $t );
 284
 285                 # Load whitelist
 286                 $sat = array () ; # stand-alone-templates; must be lowercase
 287                 $wl_title = Title::newFromText( $wgMetadataWhitelist );
 288                 $wl_article = new Article ( $wl_title );
 289                 $wl = explode ( "\n" , $wl_article->getContent() );
 290                 foreach ( $wl AS $x ) {
 291                         $isentry = false;
 292                         $x = trim ( $x );
 293                         while ( substr ( $x , 0 , 1 ) == '*' ) {
 294                                 $isentry = true;
 295                                 $x = trim ( substr ( $x , 1 ) );
 296                         }
 297                         if ( $isentry ) {
 298                                 $sat[] = strtolower ( $x );
 299                         }
 300
 301                 }
 302
 303                 # Templates, but only some
 304                 $t = explode( '{{' , $t );
 305                 $tl = array() ;
 306                 foreach ( $t as $key => $x ) {
 307                         $y = explode( '}}' , $x , 2 );
 308                         if ( count( $y ) == 2 ) {
 309                                 $z = $y[0];
 310                                 $z = explode( '|' , $z );
 311                                 $tn = array_shift( $z );
 312                                 if ( in_array( strtolower( $tn ) , $sat ) ) {
 313                                         $tl[] = '{{' . $y[0] . '}}';
 314                                         $t[$key] = $y[1];
 315                                         $y = explode( '}}' , $y[1] , 2 );
 316                                 }
 317                                 else $t[$key] = '{{' . $x;
 318                         }
 319                         else if ( $key != 0 ) $t[$key] = '{{' . $x;
 320                         else $t[$key] = $x;
 321                 }
 322                 if ( count( $tl ) ) $s .= implode( ' ' , $tl );
 323                 $t = implode( '' , $t );
 324
 325                 $t = str_replace( "\n\n\n", "\n", $t );
 326                 $this->mArticle->mContent = $t;
 327                 $this->mMetaData = $s;
 328         }
 329
 330         /*
 331          * Check if a page was deleted while the user was editing it, before submit.
 332          * Note that we rely on the logging table, which hasn't been always there,
 333          * but that doesn't matter, because this only applies to brand new
 334          * deletes.
 335          */
 336         protected function wasDeletedSinceLastEdit() {
 337                 if ( $this->deletedSinceEdit )
 338                         return true;
 339                 if ( $this->mTitle->isDeletedQuick() ) {
 340                         $this->lastDelete = $this->getLastDelete();
 341                         if ( $this->lastDelete ) {
 342                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
 343                                 if ( $deleteTime > $this->starttime ) {
 344                                         $this->deletedSinceEdit = true;
 345                                 }
 346                         }
 347                 }
 348                 return $this->deletedSinceEdit;
 349         }
 350
 351         function submit() {
 352                 $this->edit();
 353         }
 354
 355         /**
 356          * This is the function that gets called for "action=edit". It
 357          * sets up various member variables, then passes execution to
 358          * another function, usually showEditForm()
 359          *
 360          * The edit form is self-submitting, so that when things like
 361          * preview and edit conflicts occur, we get the same form back
 362          * with the extra stuff added.  Only when the final submission
 363          * is made and all is well do we actually save and redirect to
 364          * the newly-edited page.
 365          */
 366         function edit() {
 367                 global $wgOut, $wgRequest, $wgUser;
 368                 // Allow extensions to modify/prevent this form or submission
 369                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 370                         return;
 371                 }
 372
 373                 wfProfileIn( __METHOD__ );
 374                 wfDebug( __METHOD__.": enter\n" );
 375
 376                 // This is not an article
 377                 $wgOut->setArticleFlag( false );
 378
 379                 $this->importFormData( $wgRequest );
 380                 $this->firsttime = false;
 381
 382                 if ( $this->live ) {
 383                         $this->livePreview();
 384                         wfProfileOut( __METHOD__ );
 385                         return;
 386                 }
 387
 388                 if ( wfReadOnly() && $this->save ) {
 389                         // Force preview
 390                         $this->save = false;
 391                         $this->preview = true;
 392                 }
 393
 394                 $wgOut->addScriptFile( 'edit.js' );
 395
 396                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
 397                         $wgOut->includeJQuery();
 398                         $wgOut->addScriptFile( 'preview.js' );
 399                 }
 400
 401                 $permErrors = $this->getEditPermissionErrors();
 402                 if ( $permErrors ) {
 403                         wfDebug( __METHOD__ . ": User can't edit\n" );
 404                         $this->readOnlyPage( $this->getContent( false ), true, $permErrors, 'edit' );
 405                         wfProfileOut( __METHOD__ );
 406                         return;
 407                 } else {
 408                         if ( $this->save ) {
 409                                 $this->formtype = 'save';
 410                         } else if ( $this->preview ) {
 411                                 $this->formtype = 'preview';
 412                         } else if ( $this->diff ) {
 413                                 $this->formtype = 'diff';
 414                         } else { # First time through
 415                                 $this->firsttime = true;
 416                                 if ( $this->previewOnOpen() ) {
 417                                         $this->formtype = 'preview';
 418                                 } else {
 419                                         $this->extractMetaDataFromArticle () ;
 420                                         $this->formtype = 'initial';
 421                                 }
 422                         }
 423                 }
 424
 425                 // If they used redlink=1 and the page exists, redirect to the main article
 426                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 427                         $wgOut->redirect( $this->mTitle->getFullURL() );
 428                 }
 429
 430                 wfProfileIn( __METHOD__."-business-end" );
 431
 432                 $this->isConflict = false;
 433                 // css / js subpages of user pages get a special treatment
 434                 $this->isCssJsSubpage      = $this->mTitle->isCssJsSubpage();
 435                 $this->isCssSubpage        = $this->mTitle->isCssSubpage();
 436                 $this->isJsSubpage         = $this->mTitle->isJsSubpage();
 437                 $this->isValidCssJsSubpage = $this->mTitle->isValidCssJsSubpage();
 438
 439                 # Show applicable editing introductions
 440                 if ( $this->formtype == 'initial' || $this->firsttime )
 441                         $this->showIntro();
 442
 443                 if ( $this->mTitle->isTalkPage() ) {
 444                         $wgOut->addWikiMsg( 'talkpagetext' );
 445                 }
 446
 447                 # Optional notices on a per-namespace and per-page basis
 448                 $editnotice_ns   = 'editnotice-'.$this->mTitle->getNamespace();
 449                 if ( !wfEmptyMsg( $editnotice_ns, wfMsgForContent( $editnotice_ns ) ) ) {
 450                         $wgOut->addWikiText( wfMsgForContent( $editnotice_ns )  );
 451                 }
 452                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
 453                         $parts = explode( '/', $this->mTitle->getDBkey() );
 454                         $editnotice_base = $editnotice_ns;
 455                         while ( count( $parts ) > 0 ) {
 456                                 $editnotice_base .= '-'.array_shift( $parts );
 457                                 if ( !wfEmptyMsg( $editnotice_base, wfMsgForContent( $editnotice_base ) ) ) {
 458                                         $wgOut->addWikiText( wfMsgForContent( $editnotice_base )  );
 459                                 }
 460                         }
 461                 }
 462
 463                 # Attempt submission here.  This will check for edit conflicts,
 464                 # and redundantly check for locked database, blocked IPs, etc.
 465                 # that edit() already checked just in case someone tries to sneak
 466                 # in the back door with a hand-edited submission URL.
 467
 468                 if ( 'save' == $this->formtype ) {
 469                         if ( !$this->attemptSave() ) {
 470                                 wfProfileOut( __METHOD__."-business-end" );
 471                                 wfProfileOut( __METHOD__ );
 472                                 return;
 473                         }
 474                 }
 475
 476                 # First time through: get contents, set time for conflict
 477                 # checking, etc.
 478                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 479                         if ( $this->initialiseForm() === false ) {
 480                                 $this->noSuchSectionPage();
 481                                 wfProfileOut( __METHOD__."-business-end" );
 482                                 wfProfileOut( __METHOD__ );
 483                                 return;
 484                         }
 485                         if ( !$this->mTitle->getArticleId() )
 486                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 487                 }
 488
 489                 $this->showEditForm();
 490                 wfProfileOut( __METHOD__."-business-end" );
 491                 wfProfileOut( __METHOD__ );
 492         }
 493
 494         protected function getEditPermissionErrors() {
 495                 global $wgUser;
 496                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 497                 # Can this title be created?
 498                 if ( !$this->mTitle->exists() ) {
 499                         $permErrors = array_merge( $permErrors,
 500                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 501                 }
 502                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 503                 $remove = array();
 504                 foreach( $permErrors as $error ) {
 505                         if ( ( $this->preview || $this->diff ) &&
 506                                 ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' ) )
 507                         {
 508                                 $remove[] = $error;
 509                         }
 510                 }
 511                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 512                 return $permErrors;
 513         }
 514
 515         /**
 516          * Show a read-only error
 517          * Parameters are the same as OutputPage:readOnlyPage()
 518          * Redirect to the article page if redlink=1
 519          */
 520         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 521                 global $wgRequest, $wgOut;
 522                 if ( $wgRequest->getBool( 'redlink' ) ) {
 523                         // The edit page was reached via a red link.
 524                         // Redirect to the article page and let them click the edit tab if
 525                         // they really want a permission error.
 526                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 527                 } else {
 528                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 529                 }
 530         }
 531
 532         /**
 533          * Should we show a preview when the edit form is first shown?
 534          *
 535          * @return bool
 536          */
 537         protected function previewOnOpen() {
 538                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 539                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 540                         // Explicit override from request
 541                         return true;
 542                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 543                         // Explicit override from request
 544                         return false;
 545                 } elseif ( $this->section == 'new' ) {
 546                         // Nothing *to* preview for new sections
 547                         return false;
 548                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 549                         // Standard preference behaviour
 550                         return true;
 551                 } elseif ( !$this->mTitle->exists() &&
 552                   isset($wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]) &&
 553                   $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 554                 {
 555                         // Categories are special
 556                         return true;
 557                 } else {
 558                         return false;
 559                 }
 560         }
 561
 562         /**
 563          * Does this EditPage class support section editing?
 564          * This is used by EditPage subclasses to indicate their ui cannot handle section edits
 565          *
 566          * @return bool
 567          */
 568         protected function isSectionEditSupported() {
 569                 return true;
 570         }
 571
 572         /**
 573          * Returns the URL to use in the form's action attribute.
 574          * This is used by EditPage subclasses when simply customizing the action
 575          * variable in the constructor is not enough. This can be used when the
 576          * EditPage lives inside of a Special page rather than a custom page action.
 577          *
 578          * @param Title $title The title for which is being edited (where we go to for &action= links)
 579          * @return string
 580          */
 581         protected function getActionURL( Title $title ) {
 582                 return $title->getLocalURL( array( 'action' => $this->action ) );
 583         }
 584
 585         /**
 586          * @todo document
 587          * @param $request
 588          */
 589         function importFormData( &$request ) {
 590                 global $wgLang, $wgUser;
 591
 592                 wfProfileIn( __METHOD__ );
 593
 594                 # Section edit can come from either the form or a link
 595                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 596
 597                 if ( $request->wasPosted() ) {
 598                         # These fields need to be checked for encoding.
 599                         # Also remove trailing whitespace, but don't remove _initial_
 600                         # whitespace from the text boxes. This may be significant formatting.
 601                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 602                         if ( !$request->getCheck('wpTextbox2') ) {
 603                                 // Skip this if wpTextbox2 has input, it indicates that we came
 604                                 // from a conflict page with raw page text, not a custom form
 605                                 // modified by subclasses
 606                                 wfProfileIn( get_class($this)."::importContentFormData" );
 607                                 $textbox1 = $this->importContentFormData( $request );
 608                                 if ( isset($textbox1) )
 609                                         $this->textbox1 = $textbox1;
 610                                 wfProfileOut( get_class($this)."::importContentFormData" );
 611                         }
 612                         $this->mMetaData = rtrim( $request->getText( 'metadata' ) );
 613                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 614                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary' ), 250, '' );
 615
 616                         # Remove extra headings from summaries and new sections.
 617                         $this->summary = preg_replace('/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary);
 618
 619                         $this->edittime = $request->getVal( 'wpEdittime' );
 620                         $this->starttime = $request->getVal( 'wpStarttime' );
 621
 622                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 623
 624                         if ( is_null( $this->edittime ) ) {
 625                                 # If the form is incomplete, force to preview.
 626                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 627                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 628                                 $this->preview = true;
 629                         } else {
 630                                 /* Fallback for live preview */
 631                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 632                                 $this->diff = $request->getCheck( 'wpDiff' );
 633
 634                                 // Remember whether a save was requested, so we can indicate
 635                                 // if we forced preview due to session failure.
 636                                 $this->mTriedSave = !$this->preview;
 637
 638                                 if ( $this->tokenOk( $request ) ) {
 639                                         # Some browsers will not report any submit button
 640                                         # if the user hits enter in the comment box.
 641                                         # The unmarked state will be assumed to be a save,
 642                                         # if the form seems otherwise complete.
 643                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 644                                 } else if ( $this->diff ) {
 645                                         # Failed token check, but only requested "Show Changes".
 646                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 647                                 } else {
 648                                         # Page might be a hack attempt posted from
 649                                         # an external site. Preview instead of saving.
 650                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 651                                         $this->preview = true;
 652                                 }
 653                         }
 654                         $this->save = !$this->preview && !$this->diff;
 655                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 656                                 $this->edittime = null;
 657                         }
 658
 659                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 660                                 $this->starttime = null;
 661                         }
 662
 663                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 664
 665                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 666                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 667
 668                         # Don't force edit summaries when a user is editing their own user or talk page
 669                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 670                                 $this->mTitle->getText() == $wgUser->getName() )
 671                         {
 672                                 $this->allowBlankSummary = true;
 673                         } else {
 674                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary');
 675                         }
 676
 677                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 678                 } else {
 679                         # Not a posted form? Start with nothing.
 680                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 681                         $this->textbox1  = '';
 682                         $this->mMetaData = '';
 683                         $this->summary   = '';
 684                         $this->edittime  = '';
 685                         $this->starttime = wfTimestampNow();
 686                         $this->edit      = false;
 687                         $this->preview   = false;
 688                         $this->save      = false;
 689                         $this->diff      = false;
 690                         $this->minoredit = false;
 691                         $this->watchthis = $request->getBool( 'watchthis', false ); // Watch may be overriden by request parameters
 692                         $this->recreate  = false;
 693
 694                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 695                                 $this->summary = $request->getVal( 'preloadtitle' );
 696                         }
 697                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 698                                 $this->summary = $request->getText( 'summary' );
 699                         }
 700
 701                         if ( $request->getVal( 'minor' ) ) {
 702                                 $this->minoredit = true;
 703                         }
 704                 }
 705
 706                 $this->bot = $request->getBool( 'bot', true );
 707                 $this->nosummary = $request->getBool( 'nosummary' );
 708
 709                 // FIXME: unused variable?
 710                 $this->oldid = $request->getInt( 'oldid' );
 711
 712                 $this->live = $request->getCheck( 'live' );
 713                 $this->editintro = $request->getText( 'editintro',
 714                         // Custom edit intro for new sections
 715                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 716
 717                 wfProfileOut( __METHOD__ );
 718
 719                 // Allow extensions to modify form data
 720                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 721         }
 722
 723         /**
 724          * Subpage overridable method for extracting the page content data from the
 725          * posted form to be placed in $this->textbox1, if using customized input
 726          * this method should be overrided and return the page text that will be used
 727          * for saving, preview parsing and so on...
 728          *
 729          * @praram WebRequest $request
 730          */
 731         protected function importContentFormData( &$request ) {
 732                 return; // Don't do anything, EditPage already extracted wpTextbox1
 733         }
 734
 735         /**
 736          * Make sure the form isn't faking a user's credentials.
 737          *
 738          * @param $request WebRequest
 739          * @return bool
 740          * @private
 741          */
 742         function tokenOk( &$request ) {
 743                 global $wgUser;
 744                 $token = $request->getVal( 'wpEditToken' );
 745                 $this->mTokenOk = $wgUser->matchEditToken( $token );
 746                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
 747                 return $this->mTokenOk;
 748         }
 749
 750         /**
 751          * Show all applicable editing introductions
 752          */
 753         protected function showIntro() {
 754                 global $wgOut, $wgUser;
 755                 if ( $this->suppressIntro ) {
 756                         return;
 757                 }
 758
 759                 $namespace = $this->mTitle->getNamespace();
 760
 761                 if ( $namespace == NS_MEDIAWIKI ) {
 762                         # Show a warning if editing an interface message
 763                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1</div>", 'editinginterface' );
 764                 }
 765
 766                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exists
 767                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
 768                         $parts = explode( '/', $this->mTitle->getText(), 2 );
 769                         $username = $parts[0];
 770                         $id = User::idFromName( $username );
 771                         $ip = User::isIP( $username );
 772                         if ( $id == 0 && !$ip ) {
 773                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1</div>",
 774                                         array( 'userpage-userdoesnotexist', $username ) );
 775                         }
 776                 }
 777                 # Try to add a custom edit intro, or use the standard one if this is not possible.
 778                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
 779                         if ( $wgUser->isLoggedIn() ) {
 780                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1</div>", 'newarticletext' );
 781                         } else {
 782                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1</div>", 'newarticletextanon' );
 783                         }
 784                 }
 785                 # Give a notice if the user is editing a deleted/moved page...
 786                 if ( !$this->mTitle->exists() ) {
 787                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle->getPrefixedText(),
 788                                 '', array( 'lim' => 10,
 789                                            'conds' => array( "log_action != 'revision'" ),
 790                                            'showIfEmpty' => false,
 791                                            'msgKey' => array( 'recreate-moveddeleted-warn') )
 792                         );
 793                 }
 794         }
 795
 796         /**
 797          * Attempt to show a custom editing introduction, if supplied
 798          *
 799          * @return bool
 800          */
 801         protected function showCustomIntro() {
 802                 if ( $this->editintro ) {
 803                         $title = Title::newFromText( $this->editintro );
 804                         if ( $title instanceof Title && $title->exists() && $title->userCanRead() ) {
 805                                 global $wgOut;
 806                                 $revision = Revision::newFromTitle( $title );
 807                                 $wgOut->addWikiTextTitleTidy( $revision->getText(), $this->mTitle );
 808                                 return true;
 809                         } else {
 810                                 return false;
 811                         }
 812                 } else {
 813                         return false;
 814                 }
 815         }
 816
 817         /**
 818          * Attempt submission (no UI)
 819          * @return one of the constants describing the result
 820          */
 821         function internalAttemptSave( &$result, $bot = false ) {
 822                 global $wgFilterCallback, $wgUser, $wgOut, $wgParser;
 823                 global $wgMaxArticleSize;
 824
 825                 wfProfileIn( __METHOD__  );
 826                 wfProfileIn( __METHOD__ . '-checks' );
 827
 828                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) )
 829                 {
 830                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
 831                         return self::AS_HOOK_ERROR;
 832                 }
 833
 834                 # Check image redirect
 835                 if ( $this->mTitle->getNamespace() == NS_FILE &&
 836                         Title::newFromRedirect( $this->textbox1 ) instanceof Title &&
 837                         !$wgUser->isAllowed( 'upload' ) ) {
 838                                 if ( $wgUser->isAnon() ) {
 839                                         return self::AS_IMAGE_REDIRECT_ANON;
 840                                 } else {
 841                                         return self::AS_IMAGE_REDIRECT_LOGGED;
 842                                 }
 843                 }
 844
 845                 # Reintegrate metadata
 846                 if ( $this->mMetaData != '' ) $this->textbox1 .= "\n" . $this->mMetaData ;
 847                 $this->mMetaData = '' ;
 848
 849                 # Check for spam
 850                 $match = self::matchSummarySpamRegex( $this->summary );
 851                 if ( $match === false ) {
 852                         $match = self::matchSpamRegex( $this->textbox1 );
 853                 }
 854                 if ( $match !== false ) {
 855                         $result['spam'] = $match;
 856                         $ip = wfGetIP();
 857                         $pdbk = $this->mTitle->getPrefixedDBkey();
 858                         $match = str_replace( "\n", '', $match );
 859                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
 860                         wfProfileOut( __METHOD__ . '-checks' );
 861                         wfProfileOut( __METHOD__ );
 862                         return self::AS_SPAM_ERROR;
 863                 }
 864                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
 865                         # Error messages or other handling should be performed by the filter function
 866                         wfProfileOut( __METHOD__ . '-checks' );
 867                         wfProfileOut( __METHOD__ );
 868                         return self::AS_FILTERING;
 869                 }
 870                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
 871                         # Error messages etc. could be handled within the hook...
 872                         wfProfileOut( __METHOD__ . '-checks' );
 873                         wfProfileOut( __METHOD__ );
 874                         return self::AS_HOOK_ERROR;
 875                 } elseif ( $this->hookError != '' ) {
 876                         # ...or the hook could be expecting us to produce an error
 877                         wfProfileOut( __METHOD__ . '-checks' );
 878                         wfProfileOut( __METHOD__ );
 879                         return self::AS_HOOK_ERROR_EXPECTED;
 880                 }
 881                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 882                         # Check block state against master, thus 'false'.
 883                         wfProfileOut( __METHOD__ . '-checks' );
 884                         wfProfileOut( __METHOD__ );
 885                         return self::AS_BLOCKED_PAGE_FOR_USER;
 886                 }
 887                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
 888                 if ( $this->kblength > $wgMaxArticleSize ) {
 889                         // Error will be displayed by showEditForm()
 890                         $this->tooBig = true;
 891                         wfProfileOut( __METHOD__ . '-checks' );
 892                         wfProfileOut( __METHOD__ );
 893                         return self::AS_CONTENT_TOO_BIG;
 894                 }
 895
 896                 if ( !$wgUser->isAllowed( 'edit' ) ) {
 897                         if ( $wgUser->isAnon() ) {
 898                                 wfProfileOut( __METHOD__ . '-checks' );
 899                                 wfProfileOut( __METHOD__ );
 900                                 return self::AS_READ_ONLY_PAGE_ANON;
 901                         } else {
 902                                 wfProfileOut( __METHOD__ . '-checks' );
 903                                 wfProfileOut( __METHOD__ );
 904                                 return self::AS_READ_ONLY_PAGE_LOGGED;
 905                         }
 906                 }
 907
 908                 if ( wfReadOnly() ) {
 909                         wfProfileOut( __METHOD__ . '-checks' );
 910                         wfProfileOut( __METHOD__ );
 911                         return self::AS_READ_ONLY_PAGE;
 912                 }
 913                 if ( $wgUser->pingLimiter() ) {
 914                         wfProfileOut( __METHOD__ . '-checks' );
 915                         wfProfileOut( __METHOD__ );
 916                         return self::AS_RATE_LIMITED;
 917                 }
 918
 919                 # If the article has been deleted while editing, don't save it without
 920                 # confirmation
 921                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
 922                         wfProfileOut( __METHOD__ . '-checks' );
 923                         wfProfileOut( __METHOD__ );
 924                         return self::AS_ARTICLE_WAS_DELETED;
 925                 }
 926
 927                 wfProfileOut( __METHOD__ . '-checks' );
 928
 929                 # If article is new, insert it.
 930                 $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 931                 if ( 0 == $aid ) {
 932                         // Late check for create permission, just in case *PARANOIA*
 933                         if ( !$this->mTitle->userCan( 'create' ) ) {
 934                                 wfDebug( __METHOD__ . ": no create permission\n" );
 935                                 wfProfileOut( __METHOD__ );
 936                                 return self::AS_NO_CREATE_PERMISSION;
 937                         }
 938
 939                         # Don't save a new article if it's blank.
 940                         if ( $this->textbox1 == '' ) {
 941                                 wfProfileOut( __METHOD__ );
 942                                 return self::AS_BLANK_ARTICLE;
 943                         }
 944
 945                         // Run post-section-merge edit filter
 946                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
 947                                 # Error messages etc. could be handled within the hook...
 948                                 wfProfileOut( __METHOD__ );
 949                                 return self::AS_HOOK_ERROR;
 950                         } elseif ( $this->hookError != '' ) {
 951                                 # ...or the hook could be expecting us to produce an error
 952                                 wfProfileOut( __METHOD__ );
 953                                 return self::AS_HOOK_ERROR_EXPECTED;
 954                         }
 955
 956                         # Handle the user preference to force summaries here. Check if it's not a redirect.
 957                         if ( !$this->allowBlankSummary && !Title::newFromRedirect( $this->textbox1 ) ) {
 958                                 if ( md5( $this->summary ) == $this->autoSumm ) {
 959                                         $this->missingSummary = true;
 960                                         wfProfileOut( __METHOD__ );
 961                                         return self::AS_SUMMARY_NEEDED;
 962                                 }
 963                         }
 964
 965                         $isComment = ( $this->section == 'new' );
 966
 967                         $this->mArticle->insertNewArticle( $this->textbox1, $this->summary,
 968                                 $this->minoredit, $this->watchthis, false, $isComment, $bot );
 969
 970                         wfProfileOut( __METHOD__ );
 971                         return self::AS_SUCCESS_NEW_ARTICLE;
 972                 }
 973
 974                 # Article exists. Check for edit conflict.
 975
 976                 $this->mArticle->clear(); # Force reload of dates, etc.
 977                 $this->mArticle->forUpdate( true ); # Lock the article
 978
 979                 wfDebug( "timestamp: {$this->mArticle->getTimestamp()}, edittime: {$this->edittime}\n" );
 980
 981                 if ( $this->mArticle->getTimestamp() != $this->edittime ) {
 982                         $this->isConflict = true;
 983                         if ( $this->section == 'new' ) {
 984                                 if ( $this->mArticle->getUserText() == $wgUser->getName() &&
 985                                         $this->mArticle->getComment() == $this->summary ) {
 986                                         // Probably a duplicate submission of a new comment.
 987                                         // This can happen when squid resends a request after
 988                                         // a timeout but the first one actually went through.
 989                                         wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
 990                                 } else {
 991                                         // New comment; suppress conflict.
 992                                         $this->isConflict = false;
 993                                         wfDebug( __METHOD__ .": conflict suppressed; new section\n" );
 994                                 }
 995                         }
 996                 }
 997                 $userid = $wgUser->getId();
 998
 999                 # Suppress edit conflict with self, except for section edits where merging is required.
1000                 if ( $this->isConflict && $this->section == '' && $this->userWasLastToEdit( $userid, $this->edittime ) ) {
1001                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1002                         $this->isConflict = false;
1003                 }
1004
1005                 if ( $this->isConflict ) {
1006                         wfDebug( __METHOD__ . ": conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
1007                                 $this->mArticle->getTimestamp() . "')\n" );
1008                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime );
1009                 } else {
1010                         wfDebug( __METHOD__ . ": getting section '$this->section'\n" );
1011                         $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary );
1012                 }
1013                 if ( is_null( $text ) ) {
1014                         wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1015                         $this->isConflict = true;
1016                         $text = $this->textbox1; // do not try to merge here!
1017                 } else if ( $this->isConflict ) {
1018                         # Attempt merge
1019                         if ( $this->mergeChangesInto( $text ) ) {
1020                                 // Successful merge! Maybe we should tell the user the good news?
1021                                 $this->isConflict = false;
1022                                 wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1023                         } else {
1024                                 $this->section = '';
1025                                 $this->textbox1 = $text;
1026                                 wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1027                         }
1028                 }
1029
1030                 if ( $this->isConflict ) {
1031                         wfProfileOut( __METHOD__ );
1032                         return self::AS_CONFLICT_DETECTED;
1033                 }
1034
1035                 $oldtext = $this->mArticle->getContent();
1036
1037                 // Run post-section-merge edit filter
1038                 if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$this->hookError, $this->summary ) ) ) {
1039                         # Error messages etc. could be handled within the hook...
1040                         wfProfileOut( __METHOD__ );
1041                         return self::AS_HOOK_ERROR;
1042                 } elseif ( $this->hookError != '' ) {
1043                         # ...or the hook could be expecting us to produce an error
1044                         wfProfileOut( __METHOD__ );
1045                         return self::AS_HOOK_ERROR_EXPECTED;
1046                 }
1047
1048                 # Handle the user preference to force summaries here, but not for null edits
1049                 if ( $this->section != 'new' && !$this->allowBlankSummary && 0 != strcmp( $oldtext, $text )
1050                         && !Title::newFromRedirect( $text ) ) # check if it's not a redirect
1051                 {
1052                         if ( md5( $this->summary ) == $this->autoSumm ) {
1053                                 $this->missingSummary = true;
1054                                 wfProfileOut( __METHOD__ );
1055                                 return self::AS_SUMMARY_NEEDED;
1056                         }
1057                 }
1058
1059                 # And a similar thing for new sections
1060                 if ( $this->section == 'new' && !$this->allowBlankSummary ) {
1061                         if ( trim( $this->summary ) == '' ) {
1062                                 $this->missingSummary = true;
1063                                 wfProfileOut( __METHOD__ );
1064                                 return self::AS_SUMMARY_NEEDED;
1065                         }
1066                 }
1067
1068                 # All's well
1069                 wfProfileIn( __METHOD__ . '-sectionanchor' );
1070                 $sectionanchor = '';
1071                 if ( $this->section == 'new' ) {
1072                         if ( $this->textbox1 == '' ) {
1073                                 $this->missingComment = true;
1074                                 wfProfileOut( __METHOD__ . '-sectionanchor' );
1075                                 wfProfileOut( __METHOD__ );
1076                                 return self::AS_TEXTBOX_EMPTY;
1077                         }
1078                         if ( $this->summary != '' ) {
1079                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $this->summary );
1080                                 # This is a new section, so create a link to the new section
1081                                 # in the revision summary.
1082                                 $cleanSummary = $wgParser->stripSectionName( $this->summary );
1083                                 $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1084                         }
1085                 } elseif ( $this->section != '' ) {
1086                         # Try to get a section anchor from the section source, redirect to edited section if header found
1087                         # XXX: might be better to integrate this into Article::replaceSection
1088                         # for duplicate heading checking and maybe parsing
1089                         $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1090                         # we can't deal with anchors, includes, html etc in the header for now,
1091                         # headline would need to be parsed to improve this
1092                         if ( $hasmatch and strlen( $matches[2] ) > 0 ) {
1093                                 $sectionanchor = $wgParser->guessSectionNameFromWikiText( $matches[2] );
1094                         }
1095                 }
1096                 wfProfileOut( __METHOD__ . '-sectionanchor' );
1097
1098                 // Save errors may fall down to the edit form, but we've now
1099                 // merged the section into full text. Clear the section field
1100                 // so that later submission of conflict forms won't try to
1101                 // replace that into a duplicated mess.
1102                 $this->textbox1 = $text;
1103                 $this->section = '';
1104
1105                 // Check for length errors again now that the section is merged in
1106                 $this->kblength = (int)( strlen( $text ) / 1024 );
1107                 if ( $this->kblength > $wgMaxArticleSize ) {
1108                         $this->tooBig = true;
1109                         wfProfileOut( __METHOD__ );
1110                         return self::AS_MAX_ARTICLE_SIZE_EXCEEDED;
1111                 }
1112
1113                 # update the article here
1114                 if ( $this->mArticle->updateArticle( $text, $this->summary, $this->minoredit,
1115                         $this->watchthis, $bot, $sectionanchor ) )
1116                 {
1117                         wfProfileOut( __METHOD__ );
1118                         return self::AS_SUCCESS_UPDATE;
1119                 } else {
1120                         $this->isConflict = true;
1121                 }
1122                 wfProfileOut( __METHOD__ );
1123                 return self::AS_END;
1124         }
1125
1126         /**
1127          * Check if no edits were made by other users since
1128          * the time a user started editing the page. Limit to
1129          * 50 revisions for the sake of performance.
1130          */
1131         protected function userWasLastToEdit( $id, $edittime ) {
1132                 if( !$id ) return false;
1133                 $dbw = wfGetDB( DB_MASTER );
1134                 $res = $dbw->select( 'revision',
1135                         'rev_user',
1136                         array(
1137                                 'rev_page' => $this->mArticle->getId(),
1138                                 'rev_timestamp > '.$dbw->addQuotes( $dbw->timestamp($edittime) )
1139                         ),
1140                         __METHOD__,
1141                         array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
1142                 while( $row = $res->fetchObject() ) {
1143                         if( $row->rev_user != $id ) {
1144                                 return false;
1145                         }
1146                 }
1147                 return true;
1148         }
1149
1150         /**
1151          * Check given input text against $wgSpamRegex, and return the text of the first match.
1152          * @return mixed -- matching string or false
1153          */
1154         public static function matchSpamRegex( $text ) {
1155                 global $wgSpamRegex;
1156                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1157                 $regexes = (array)$wgSpamRegex;
1158                 return self::matchSpamRegexInternal( $text, $regexes );
1159         }
1160
1161         /**
1162          * Check given input text against $wgSpamRegex, and return the text of the first match.
1163          * @return mixed -- matching string or false
1164          */
1165         public static function matchSummarySpamRegex( $text ) {
1166                 global $wgSummarySpamRegex;
1167                 $regexes = (array)$wgSummarySpamRegex;
1168                 return self::matchSpamRegexInternal( $text, $regexes );
1169         }
1170
1171         protected static function matchSpamRegexInternal( $text, $regexes ) {
1172                 foreach( $regexes as $regex ) {
1173                         $matches = array();
1174                         if( preg_match( $regex, $text, $matches ) ) {
1175                                 return $matches[0];
1176                         }
1177                 }
1178                 return false;
1179         }
1180
1181         /**
1182          * Initialise form fields in the object
1183          * Called on the first invocation, e.g. when a user clicks an edit link
1184          * @returns bool -- if the requested section is valid
1185          */
1186         function initialiseForm() {
1187                 global $wgUser;
1188                 $this->edittime = $this->mArticle->getTimestamp();
1189                 $this->textbox1 = $this->getContent( false );
1190                 // activate checkboxes if user wants them to be always active
1191                 # Sort out the "watch" checkbox
1192                 if ( $wgUser->getOption( 'watchdefault' ) ) {
1193                         # Watch all edits
1194                         $this->watchthis = true;
1195                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1196                         # Watch creations
1197                         $this->watchthis = true;
1198                 } elseif ( $this->mTitle->userIsWatching() ) {
1199                         # Already watched
1200                         $this->watchthis = true;
1201                 }
1202                 if ( $wgUser->getOption( 'minordefault' ) ) $this->minoredit = true;
1203                 if ( $this->textbox1 === false ) return false;
1204                 wfProxyCheck();
1205                 return true;
1206         }
1207
1208         function setHeaders() {
1209                 global $wgOut, $wgTitle;
1210                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1211                 if ( $this->formtype == 'preview' ) {
1212                         $wgOut->setPageTitleActionText( wfMsg( 'preview' ) );
1213                 }
1214                 if ( $this->isConflict ) {
1215                         $wgOut->setPageTitle( wfMsg( 'editconflict', $wgTitle->getPrefixedText() ) );
1216                 } elseif ( $this->section != '' ) {
1217                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1218                         $wgOut->setPageTitle( wfMsg( $msg, $wgTitle->getPrefixedText() ) );
1219                 } else {
1220                         # Use the title defined by DISPLAYTITLE magic word when present
1221                         if ( isset( $this->mParserOutput )
1222                          && ( $dt = $this->mParserOutput->getDisplayTitle() ) !== false ) {
1223                                 $title = $dt;
1224                         } else {
1225                                 $title = $wgTitle->getPrefixedText();
1226                         }
1227                         $wgOut->setPageTitle( wfMsg( 'editing', $title ) );
1228                 }
1229         }
1230
1231         /**
1232          * Send the edit form and related headers to $wgOut
1233          * @param $formCallback Optional callable that takes an OutputPage
1234          *                      parameter; will be called during form output
1235          *                      near the top, for captchas and the like.
1236          */
1237         function showEditForm( $formCallback=null ) {
1238                 global $wgOut, $wgUser, $wgTitle;
1239
1240                 # If $wgTitle is null, that means we're in API mode.
1241                 # Some hook probably called this function  without checking
1242                 # for is_null($wgTitle) first. Bail out right here so we don't
1243                 # do lots of work just to discard it right after.
1244                 if ( is_null( $wgTitle ) )
1245                         return;
1246
1247                 wfProfileIn( __METHOD__ );
1248
1249                 $sk = $wgUser->getSkin();
1250
1251                 #need to parse the preview early so that we know which templates are used,
1252                 #otherwise users with "show preview after edit box" will get a blank list
1253                 #we parse this near the beginning so that setHeaders can do the title
1254                 #setting work instead of leaving it in getPreviewText
1255                 $previewOutput = '';
1256                 if ( $this->formtype == 'preview' ) {
1257                         $previewOutput = $this->getPreviewText();
1258                 }
1259
1260                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) );
1261
1262                 $this->setHeaders();
1263
1264                 # Enabled article-related sidebar, toplinks, etc.
1265                 $wgOut->setArticleRelated( true );
1266
1267                 if ( $this->showHeader() === false )
1268                         return;
1269
1270                 $action = htmlspecialchars($this->getActionURL($wgTitle));
1271
1272                 if ( $wgUser->getOption( 'showtoolbar' ) and !$this->isCssJsSubpage ) {
1273                         # prepare toolbar for edit buttons
1274                         $toolbar = EditPage::getEditToolbar();
1275                 } else {
1276                         $toolbar = '';
1277                 }
1278
1279
1280                 $wgOut->addHTML( $this->editFormPageTop );
1281
1282                 if ( $wgUser->getOption( 'previewontop' ) ) {
1283                         $this->displayPreviewArea( $previewOutput, true );
1284                 }
1285
1286                 $wgOut->addHTML( $this->editFormTextTop );
1287
1288                 $templates = $this->getTemplates();
1289                 $formattedtemplates = $sk->formatTemplates( $templates, $this->preview, $this->section != '');
1290
1291                 $hiddencats = $this->mArticle->getHiddenCategories();
1292                 $formattedhiddencats = $sk->formatHiddenCategories( $hiddencats );
1293
1294                 if ( $this->wasDeletedSinceLastEdit() && 'save' != $this->formtype ) {
1295                         $wgOut->wrapWikiMsg(
1296                                 "<div class='error mw-deleted-while-editing'>\n$1</div>",
1297                                 'deletedwhileediting' );
1298                 } elseif ( $this->wasDeletedSinceLastEdit() ) {
1299                         // Hide the toolbar and edit area, user can click preview to get it back
1300                         // Add an confirmation checkbox and explanation.
1301                         $toolbar = '';
1302                         // @todo move this to a cleaner conditional instead of blanking a variable
1303                 }
1304                 $wgOut->addHTML( <<<HTML
1305 {$toolbar}
1306 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1307 HTML
1308 );
1309
1310                 if ( is_callable( $formCallback ) ) {
1311                         call_user_func_array( $formCallback, array( &$wgOut ) );
1312                 }
1313
1314                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1315
1316                 // Put these up at the top to ensure they aren't lost on early form submission
1317                 $this->showFormBeforeText();
1318
1319                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
1320                         $wgOut->addHTML(
1321                                 '<div class="mw-confirm-recreate">' .
1322                                 $wgOut->parse( wfMsg( 'confirmrecreate',  $this->lastDelete->user_name , $this->lastDelete->log_comment ) ) .
1323                                 Xml::checkLabel( wfMsg( 'recreate' ), 'wpRecreate', 'wpRecreate', false,
1324                                         array( 'title' => $sk->titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
1325                                 ) .
1326                                 '</div>'
1327                         );
1328                 }
1329
1330                 # If a blank edit summary was previously provided, and the appropriate
1331                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1332                 # user being bounced back more than once in the event that a summary
1333                 # is not required.
1334                 #####
1335                 # For a bit more sophisticated detection of blank summaries, hash the
1336                 # automatic one and pass that in the hidden field wpAutoSummary.
1337                 if ( $this->missingSummary ||
1338                         ( $this->section == 'new' && $this->nosummary ) )
1339                                 $wgOut->addHTML( Xml::hidden( 'wpIgnoreBlankSummary', true ) );
1340                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1341                 $wgOut->addHTML( Xml::hidden( 'wpAutoSummary', $autosumm ) );
1342
1343                 $wgOut->addHTML( Xml::hidden( 'oldid', $this->mArticle->getOldID() ) );
1344
1345                 if ( $this->section == 'new' ) {
1346                         $this->showSummaryInput( true, $this->summary );
1347                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
1348                 }
1349
1350                 $wgOut->addHTML( $this->editFormTextBeforeContent );
1351
1352                 if ( $this->isConflict ) {
1353                         // In an edit conflict bypass the overrideable content form method
1354                         // and fallback to the raw wpTextbox1 since editconflicts can't be
1355                         // resolved between page source edits and custom ui edits using the
1356                         // custom edit ui.
1357                         $this->showTextbox1();
1358                 } else {
1359                         $this->showContentForm();
1360                 }
1361
1362                 $wgOut->addHTML( $this->editFormTextAfterContent );
1363
1364                 $wgOut->addWikiText( $this->getCopywarn() );
1365                 if ( isset($this->editFormTextAfterWarn) && $this->editFormTextAfterWarn !== '' )
1366                         $wgOut->addHTML( $this->editFormTextAfterWarn );
1367
1368                 global $wgUseMetadataEdit;
1369                 if ( $wgUseMetadataEdit )
1370                         $this->showMetaData();
1371
1372                 $this->showStandardInputs();
1373
1374                 $this->showFormAfterText();
1375
1376                 $this->showTosSummary();
1377                 $this->showEditTools();
1378
1379                 $wgOut->addHTML( <<<HTML
1380 {$this->editFormTextAfterTools}
1381 <div class='templatesUsed'>
1382 {$formattedtemplates}
1383 </div>
1384 <div class='hiddencats'>
1385 {$formattedhiddencats}
1386 </div>
1387 HTML
1388 );
1389
1390                 if ( $this->isConflict )
1391                         $this->showConflict();
1392
1393                 $wgOut->addHTML( $this->editFormTextBottom );
1394                 $wgOut->addHTML( "</form>\n" );
1395                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1396                         $this->displayPreviewArea( $previewOutput, false );
1397                 }
1398
1399                 wfProfileOut( __METHOD__ );
1400         }
1401
1402         protected function showHeader() {
1403                 global $wgOut, $wgUser, $wgTitle, $wgMaxArticleSize, $wgLang;
1404                 if ( $this->isConflict ) {
1405                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1</div>", 'explainconflict' );
1406                         $this->edittime = $this->mArticle->getTimestamp();
1407                 } else {
1408                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
1409                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
1410                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
1411                                 // Someone is welcome to try refactoring though
1412                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
1413                                 return false;
1414                         }
1415
1416                         if ( $this->section != '' && $this->section != 'new' ) {
1417                                 $matches = array();
1418                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
1419                                         preg_match( "/^(=+)(.+)\\1/mi", $this->textbox1, $matches );
1420                                         if ( !empty( $matches[2] ) ) {
1421                                                 global $wgParser;
1422                                                 $this->summary = "/* " .
1423                                                         $wgParser->stripSectionName(trim($matches[2])) .
1424                                                         " */ ";
1425                                         }
1426                                 }
1427                         }
1428
1429                         if ( $this->missingComment ) {
1430                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1</div>", 'missingcommenttext' );
1431                         }
1432
1433                         if ( $this->missingSummary && $this->section != 'new' ) {
1434                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1</div>", 'missingsummary' );
1435                         }
1436
1437                         if ( $this->missingSummary && $this->section == 'new' ) {
1438                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1</div>", 'missingcommentheader' );
1439                         }
1440
1441                         if ( $this->hookError !== '' ) {
1442                                 $wgOut->addWikiText( $this->hookError );
1443                         }
1444
1445                         if ( !$this->checkUnicodeCompliantBrowser() ) {
1446                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
1447                         }
1448
1449                         if ( isset( $this->mArticle ) && isset( $this->mArticle->mRevision ) ) {
1450                         // Let sysop know that this will make private content public if saved
1451
1452                                 if ( !$this->mArticle->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1453                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n", 'rev-deleted-text-permission' );
1454                                 } else if ( $this->mArticle->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1455                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n", 'rev-deleted-text-view' );
1456                                 }
1457
1458                                 if ( !$this->mArticle->mRevision->isCurrent() ) {
1459                                         $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
1460                                         $wgOut->addWikiMsg( 'editingold' );
1461                                 }
1462                         }
1463                 }
1464
1465                 if ( wfReadOnly() ) {
1466                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
1467                 } elseif ( $wgUser->isAnon() && $this->formtype != 'preview' ) {
1468                         $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
1469                 } else {
1470                         if ( $this->isCssJsSubpage ) {
1471                                 # Check the skin exists
1472                                 if ( !$this->isValidCssJsSubpage ) {
1473                                         $wgOut->addWikiMsg( 'userinvalidcssjstitle', $wgTitle->getSkinFromCssJsSubpage() );
1474                                 }
1475                                 if ( $this->formtype !== 'preview' ) {
1476                                         if ( $this->isCssSubpage )
1477                                                 $wgOut->addWikiMsg( 'usercssyoucanpreview' );
1478                                         if ( $this->isJsSubpage )
1479                                                 $wgOut->addWikiMsg( 'userjsyoucanpreview' );
1480                                 }
1481                         }
1482                 }
1483
1484                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
1485                         # Is the title semi-protected?
1486                         if ( $this->mTitle->isSemiProtected() ) {
1487                                 $noticeMsg = 'semiprotectedpagewarning';
1488                         } else {
1489                                 # Then it must be protected based on static groups (regular)
1490                                 $noticeMsg = 'protectedpagewarning';
1491                         }
1492                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle->getPrefixedText(), '',
1493                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
1494                 }
1495                 if ( $this->mTitle->isCascadeProtected() ) {
1496                         # Is this page under cascading protection from some source pages?
1497                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
1498                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
1499                         $cascadeSourcesCount = count( $cascadeSources );
1500                         if ( $cascadeSourcesCount > 0 ) {
1501                                 # Explain, and list the titles responsible
1502                                 foreach( $cascadeSources as $page ) {
1503                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
1504                                 }
1505                         }
1506                         $notice .= '</div>';
1507                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
1508                 }
1509                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
1510                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle->getPrefixedText(), '',
1511                                 array(  'lim' => 1,
1512                                         'showIfEmpty' => false,
1513                                         'msgKey' => array( 'titleprotectedwarning' ),
1514                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
1515                 }
1516
1517                 if ( $this->kblength === false ) {
1518                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1519                 }
1520
1521                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
1522                         $wgOut->addHTML( "<div class='error' id='mw-edit-longpageerror'>\n" );
1523                         $wgOut->addWikiMsg( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) );
1524                         $wgOut->addHTML( "</div>\n" );
1525                 } elseif ( $this->kblength > 29 ) {
1526                         $wgOut->addHTML( "<div id='mw-edit-longpagewarning'>\n" );
1527                         $wgOut->addWikiMsg( 'longpagewarning', $wgLang->formatNum( $this->kblength ) );
1528                         $wgOut->addHTML( "</div>\n" );
1529                 }
1530         }
1531
1532         /**
1533          * Standard summary input and label (wgSummary), abstracted so EditPage
1534          * subclasses may reorganize the form.
1535          * Note that you do not need to worry about the label's for=, it will be
1536          * inferred by the id given to the input. You can remove them both by
1537          * passing array( 'id' => false ) to $userInputAttrs.
1538          *
1539          * @param $summary The value of the summary input
1540          * @param $labelText The html to place inside the label
1541          * @param $userInputAttrs An array of attrs to use on the input
1542          * @param $userSpanAttrs An array of attrs to use on the span inside the label
1543          *
1544          * @return array An array in the format array( $label, $input )
1545          */
1546         function getSummaryInput($summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null) {
1547                 $inputAttrs = ( is_array($inputAttrs) ? $inputAttrs : array() ) + array(
1548                         'id' => 'wpSummary',
1549                         'maxlength' => '200',
1550                         'tabindex' => '2',
1551                         'size' => 60,
1552                         'spellcheck' => 'true',
1553                 );
1554
1555                 $spanLabelAttrs = ( is_array($spanLabelAttrs) ? $spanLabelAttrs : array() ) + array(
1556                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
1557                         'id' => "wpSummaryLabel"
1558                 );
1559
1560                 $label = null;
1561                 if ( $labelText ) {
1562                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
1563                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
1564                 }
1565
1566                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
1567
1568                 return array( $label, $input );
1569         }
1570
1571         /**
1572          * @param bool $isSubjectPreview true if this is the section subject/title
1573          *                               up top, or false if this is the comment
1574          *                               summary down below the textarea
1575          * @param string $summary The text of the summary to display
1576          * @return string
1577          */
1578         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
1579                 global $wgOut, $wgContLang;
1580                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
1581                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
1582                 if ( $isSubjectPreview ) {
1583                         if ( $this->nosummary )
1584                                 return;
1585                 } else {
1586                         if ( !$this->mShowSummaryField )
1587                                 return;
1588                 }
1589                 $summary = $wgContLang->recodeForEdit( $summary );
1590                 $labelText = wfMsgExt( $isSubjectPreview ? 'subject' : 'summary', 'parseinline' );
1591                 list($label, $input) = $this->getSummaryInput($summary, $labelText, array( 'class' => $summaryClass ), array());
1592                 $wgOut->addHTML("{$label} {$input}");
1593         }
1594
1595         /**
1596          * @param bool $isSubjectPreview true if this is the section subject/title
1597          *                               up top, or false if this is the comment
1598          *                               summary down below the textarea
1599          * @param string $summary The text of the summary to display
1600          * @return string
1601          */
1602         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
1603                 if ( !$summary || ( !$this->preview && !$this->diff ) )
1604                         return "";
1605
1606                 global $wgParser, $wgUser;
1607                 $sk = $wgUser->getSkin();
1608
1609                 if ( $isSubjectPreview )
1610                         $summary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $summary ) );
1611
1612                 $summary = wfMsgExt( 'subject-preview', 'parseinline' ) . $sk->commentBlock( $summary, $this->mTitle, !!$isSubjectPreview );
1613                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
1614         }
1615
1616         protected function showFormBeforeText() {
1617                 global $wgOut;
1618                 $section = htmlspecialchars( $this->section );
1619                 $wgOut->addHTML( <<<INPUTS
1620 <input type='hidden' value="{$section}" name="wpSection" />
1621 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
1622 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
1623 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
1624
1625 INPUTS
1626                 );
1627                 if ( !$this->checkUnicodeCompliantBrowser() )
1628                         $wgOut->addHTML(Xml::hidden( 'safemode', '1' ));
1629         }
1630
1631         protected function showFormAfterText() {
1632                 global $wgOut, $wgUser;
1633                 /**
1634                  * To make it harder for someone to slip a user a page
1635                  * which submits an edit form to the wiki without their
1636                  * knowledge, a random token is associated with the login
1637                  * session. If it's not passed back with the submission,
1638                  * we won't save the page, or render user JavaScript and
1639                  * CSS previews.
1640                  *
1641                  * For anon editors, who may not have a session, we just
1642                  * include the constant suffix to prevent editing from
1643                  * broken text-mangling proxies.
1644                  */
1645                 $wgOut->addHTML( "\n" . Xml::hidden( "wpEditToken", $wgUser->editToken() ) . "\n" );
1646         }
1647
1648         /**
1649          * Subpage overridable method for printing the form for page content editing
1650          * By default this simply outputs wpTextbox1
1651          * Subclasses can override this to provide a custom UI for editing;
1652          * be it a form, or simply wpTextbox1 with a modified content that will be
1653          * reverse modified when extracted from the post data.
1654          * Note that this is basically the inverse for importContentFormData
1655          *
1656          * @praram WebRequest $request
1657          */
1658         protected function showContentForm() {
1659                 $this->showTextbox1();
1660         }
1661
1662         /**
1663          * Method to output wpTextbox1
1664          * The $textoverride method can be used by subclasses overriding showContentForm
1665          * to pass back to this method.
1666          *
1667          * @param array $customAttribs An array of html attributes to use in the textarea
1668          * @param string $textoverride Optional text to override $this->textarea1 with
1669          */
1670         protected function showTextbox1($customAttribs = null, $textoverride = null) {
1671                 $classes = array(); // Textarea CSS
1672                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
1673                         # Is the title semi-protected?
1674                         if ( $this->mTitle->isSemiProtected() ) {
1675                                 $classes[] = 'mw-textarea-sprotected';
1676                         } else {
1677                                 # Then it must be protected based on static groups (regular)
1678                                 $classes[] = 'mw-textarea-protected';
1679                         }
1680                 }
1681                 $attribs = array( 'tabindex' => 1 );
1682                 if ( is_array($customAttribs) )
1683                         $attribs += $customAttribs;
1684
1685                 if ( $this->wasDeletedSinceLastEdit() )
1686                         $attribs['type'] = 'hidden';
1687                 if ( !empty( $classes ) ) {
1688                         if ( isset($attribs['class']) )
1689                                 $classes[] = $attribs['class'];
1690                         $attribs['class'] = implode( ' ', $classes );
1691                 }
1692
1693                 $this->showTextbox( isset($textoverride) ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
1694         }
1695
1696         protected function showTextbox2() {
1697                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6 ) );
1698         }
1699
1700         protected function showTextbox( $content, $name, $customAttribs = array() ) {
1701                 global $wgOut, $wgUser;
1702
1703                 $wikitext = $this->safeUnicodeOutput( $content );
1704                 if ( $wikitext !== '' ) {
1705                         // Ensure there's a newline at the end, otherwise adding lines
1706                         // is awkward.
1707                         // But don't add a newline if the ext is empty, or Firefox in XHTML
1708                         // mode will show an extra newline. A bit annoying.
1709                         $wikitext .= "\n";
1710                 }
1711
1712                 $attribs = $customAttribs + array(
1713                         'accesskey' => ',',
1714                         'id'   => $name,
1715                         'cols' => $wgUser->getIntOption( 'cols' ),
1716                         'rows' => $wgUser->getIntOption( 'rows' ),
1717                         'style' => '' // avoid php notices when appending for editwidth preference (appending allows customAttribs['style'] to still work
1718                 );
1719
1720                 if ( $wgUser->getOption( 'editwidth' ) )
1721                         $attribs['style'] .= 'width: 100%';
1722
1723                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
1724         }
1725
1726         protected function showMetaData() {
1727                 global $wgOut, $wgContLang, $wgUser;
1728                 $metadata = htmlspecialchars( $wgContLang->recodeForEdit( $this->mMetaData ) );
1729                 $ew = $wgUser->getOption( 'editwidth' ) ? ' style="width:100%"' : '';
1730                 $cols = $wgUser->getIntOption( 'cols' );
1731                 $metadata = wfMsgWikiHtml( 'metadata_help' ) . "<textarea name='metadata' rows='3' cols='{$cols}'{$ew}>{$metadata}</textarea>" ;
1732                 $wgOut->addHTML( $metadata );
1733         }
1734
1735         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
1736                 global $wgOut;
1737                 $classes = array();
1738                 if ( $isOnTop )
1739                         $classes[] = 'ontop';
1740
1741                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
1742
1743                 if ( $this->formtype != 'preview' )
1744                         $attribs['style'] = 'display: none;';
1745
1746                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
1747
1748                 if ( $this->formtype == 'preview' ) {
1749                         $this->showPreview( $previewOutput );
1750                 }
1751
1752                 $wgOut->addHTML( '</div>' );
1753
1754                 if ( $this->formtype == 'diff') {
1755                         $this->showDiff();
1756                 }
1757         }
1758
1759         /**
1760          * Append preview output to $wgOut.
1761          * Includes category rendering if this is a category page.
1762          *
1763          * @param string $text The HTML to be output for the preview.
1764          */
1765         protected function showPreview( $text ) {
1766                 global $wgOut;
1767                 if ( $this->mTitle->getNamespace() == NS_CATEGORY) {
1768                         $this->mArticle->openShowCategory();
1769                 }
1770                 # This hook seems slightly odd here, but makes things more
1771                 # consistent for extensions.
1772                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
1773                 $wgOut->addHTML( $text );
1774                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
1775                         $this->mArticle->closeShowCategory();
1776                 }
1777         }
1778
1779         protected function showTosSummary() {
1780                 $msg = 'editpage-tos-summary';
1781                 // Give a chance for site and per-namespace customizations of
1782                 // terms of service summary link that might exist separately
1783                 // from the copyright notice.
1784                 //
1785                 // This will display between the save button and the edit tools,
1786                 // so should remain short!
1787                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
1788                 $text = wfMsg( $msg );
1789                 if( !wfEmptyMsg( $msg, $text ) && $text !== '-' ) {
1790                         global $wgOut;
1791                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
1792                         $wgOut->addWikiMsgArray( $msg, array() );
1793                         $wgOut->addHTML( '</div>' );
1794                 }
1795         }
1796
1797         protected function showEditTools() {
1798                 global $wgOut;
1799                 $wgOut->addHTML( '<div class="mw-editTools">' );
1800                 $wgOut->addWikiMsgArray( 'edittools', array(), array( 'content' ) );
1801                 $wgOut->addHTML( '</div>' );
1802         }
1803
1804         protected function getCopywarn() {
1805                 global $wgRightsText;
1806                 if ( $wgRightsText ) {
1807                         $copywarnMsg = array( 'copyrightwarning',
1808                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
1809                                 $wgRightsText );
1810                 } else {
1811                         $copywarnMsg = array( 'copyrightwarning2',
1812                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
1813                 }
1814                 // Allow for site and per-namespace customization of contribution/copyright notice.
1815                 wfRunHooks( 'EditPageCopyrightWarning', array( $this->mTitle, &$copywarnMsg ) );
1816
1817                 return "<div id=\"editpage-copywarn\">\n" . call_user_func_array("wfMsgNoTrans", $copywarnMsg) . "\n</div>";
1818         }
1819
1820         protected function showStandardInputs( &$tabindex = 2 ) {
1821                 global $wgOut, $wgUser;
1822                 $wgOut->addHTML( "<div class='editOptions'>\n" );
1823
1824                 if ( $this->section != 'new' ) {
1825                         $this->showSummaryInput( false, $this->summary );
1826                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
1827                 }
1828
1829                 $checkboxes = $this->getCheckboxes( $tabindex, $wgUser->getSkin(),
1830                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
1831                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
1832                 $wgOut->addHTML( "<div class='editButtons'>\n" );
1833                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
1834
1835                 $cancel = $this->getCancelLink();
1836                 $separator = wfMsgExt( 'pipe-separator' , 'escapenoentities' );
1837                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ) );
1838                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
1839                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
1840                         htmlspecialchars( wfMsg( 'newwindow' ) );
1841                 $wgOut->addHTML( "      <span class='editHelp'>{$cancel}{$separator}{$edithelp}</span>\n" );
1842                 $wgOut->addHTML( "</div><!-- editButtons -->\n</div><!-- editOptions -->\n" );
1843         }
1844
1845         protected function showConflict() {
1846                 global $wgOut;
1847                 $this->textbox2 = $this->textbox1;
1848                 $this->textbox1 = $this->getContent();
1849                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
1850                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
1851
1852                         $de = new DifferenceEngine( $this->mTitle );
1853                         $de->setText( $this->textbox2, $this->textbox1 );
1854                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
1855
1856                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
1857                         $this->showTextbox2();
1858                 }
1859         }
1860
1861         protected function getLastDelete() {
1862                 $dbr = wfGetDB( DB_SLAVE );
1863                 $data = $dbr->selectRow(
1864                         array( 'logging', 'user' ),
1865                         array( 'log_type',
1866                                'log_action',
1867                                'log_timestamp',
1868                                'log_user',
1869                                'log_namespace',
1870                                'log_title',
1871                                'log_comment',
1872                                'log_params',
1873                                'log_deleted',
1874                                'user_name' ),
1875                         array( 'log_namespace' => $this->mTitle->getNamespace(),
1876                                'log_title' => $this->mTitle->getDBkey(),
1877                                'log_type' => 'delete',
1878                                'log_action' => 'delete',
1879                                'user_id=log_user' ),
1880                         __METHOD__,
1881                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
1882                 );
1883                 // Quick paranoid permission checks...
1884                 if( is_object( $data ) ) {
1885                         if( $data->log_deleted & LogPage::DELETED_USER )
1886                                 $data->user_name = wfMsgHtml( 'rev-deleted-user' );
1887                         if( $data->log_deleted & LogPage::DELETED_COMMENT )
1888                                 $data->log_comment = wfMsgHtml( 'rev-deleted-comment' );
1889                 }
1890                 return $data;
1891         }
1892
1893         /**
1894          * Get the rendered text for previewing.
1895          * @return string
1896          */
1897         function getPreviewText() {
1898                 global $wgOut, $wgUser, $wgTitle, $wgParser, $wgLang, $wgContLang, $wgMessageCache;
1899
1900                 wfProfileIn( __METHOD__ );
1901
1902                 if ( $this->mTriedSave && !$this->mTokenOk ) {
1903                         if ( $this->mTokenOkExceptSuffix ) {
1904                                 $note = wfMsg( 'token_suffix_mismatch' );
1905                         } else {
1906                                 $note = wfMsg( 'session_fail_preview' );
1907                         }
1908                 } else {
1909                         $note = wfMsg( 'previewnote' );
1910                 }
1911
1912                 $parserOptions = ParserOptions::newFromUser( $wgUser );
1913                 $parserOptions->setEditSection( false );
1914                 $parserOptions->setIsPreview( true );
1915                 $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
1916
1917                 global $wgRawHtml;
1918                 if ( $wgRawHtml && !$this->mTokenOk ) {
1919                         // Could be an offsite preview attempt. This is very unsafe if
1920                         // HTML is enabled, as it could be an attack.
1921                         return $wgOut->parse( "<div class='previewnote'>" .
1922                                 wfMsg( 'session_fail_preview_html' ) . "</div>" );
1923                 }
1924
1925                 # don't parse user css/js, show message about preview
1926                 # XXX: stupid php bug won't let us use $wgTitle->isCssJsSubpage() here
1927
1928                 if ( $this->isCssJsSubpage ) {
1929                         if (preg_match( "/\\.css$/", $this->mTitle->getText() ) ) {
1930                                 $previewtext = wfMsg( 'usercsspreview' );
1931                         } else if (preg_match( "/\\.js$/", $this->mTitle->getText() ) ) {
1932                                 $previewtext = wfMsg( 'userjspreview' );
1933                         }
1934                         $parserOptions->setTidy( true );
1935                         $parserOutput = $wgParser->parse( $previewtext, $this->mTitle, $parserOptions );
1936                         $previewHTML = $parserOutput->mText;
1937                 } elseif ( $rt = Title::newFromRedirectArray( $this->textbox1 ) ) {
1938                         $previewHTML = $this->mArticle->viewRedirect( $rt, false );
1939                 } else {
1940                         $toparse = $this->textbox1;
1941
1942                         # If we're adding a comment, we need to show the
1943                         # summary as the headline
1944                         if ( $this->section == "new" && $this->summary != "" ) {
1945                                 $toparse="== {$this->summary} ==\n\n" . $toparse;
1946                         }
1947
1948                         if ( $this->mMetaData != "" ) $toparse .= "\n" . $this->mMetaData;
1949
1950                         // Parse mediawiki messages with correct target language
1951                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1952                                 list( /* $unused */, $lang ) = $wgMessageCache->figureMessage( $this->mTitle->getText() );
1953                                 $obj = wfGetLangObj( $lang );
1954                                 $parserOptions->setTargetLanguage( $obj );
1955                         }
1956
1957
1958                         $parserOptions->setTidy( true );
1959                         $parserOptions->enableLimitReport();
1960                         $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ),
1961                                         $this->mTitle, $parserOptions );
1962
1963                         $previewHTML = $parserOutput->getText();
1964                         $this->mParserOutput = $parserOutput;
1965                         $wgOut->addParserOutputNoText( $parserOutput );
1966
1967                         if ( count( $parserOutput->getWarnings() ) ) {
1968                                 $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
1969                         }
1970                 }
1971
1972                 if( $this->isConflict ) {
1973                         $conflict = '<h2 id="mw-previewconflict">' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
1974                 } else {
1975                         $conflict = '<hr />';
1976                 }
1977
1978                 $previewhead = "<div class='previewnote'>\n" .
1979                         '<h2 id="mw-previewheader">' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>" .
1980                         $wgOut->parse( $note ) . $conflict . "</div>\n";
1981
1982                 wfProfileOut( __METHOD__ );
1983                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
1984         }
1985
1986         function getTemplates() {
1987                 if ( $this->preview || $this->section != '' ) {
1988                         $templates = array();
1989                         if ( !isset( $this->mParserOutput ) ) return $templates;
1990                         foreach( $this->mParserOutput->getTemplates() as $ns => $template) {
1991                                 foreach( array_keys( $template ) as $dbk ) {
1992                                         $templates[] = Title::makeTitle($ns, $dbk);
1993                                 }
1994                         }
1995                         return $templates;
1996                 } else {
1997                         return $this->mArticle->getUsedTemplates();
1998                 }
1999         }
2000
2001         /**
2002          * Call the stock "user is blocked" page
2003          */
2004         function blockedPage() {
2005                 global $wgOut;
2006                 $wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
2007
2008                 # If the user made changes, preserve them when showing the markup
2009                 # (This happens when a user is blocked during edit, for instance)
2010                 $first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
2011                 if ( $first ) {
2012                         $source = $this->mTitle->exists() ? $this->getContent() : false;
2013                 } else {
2014                         $source = $this->textbox1;
2015                 }
2016
2017                 # Spit out the source or the user's modified version
2018                 if ( $source !== false ) {
2019                         $wgOut->addHTML( '<hr />' );
2020                         $wgOut->addWikiMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() );
2021                         $this->showTextbox1( array( 'readonly' ), $source );
2022                 }
2023         }
2024
2025         /**
2026          * Produce the stock "please login to edit pages" page
2027          */
2028         function userNotLoggedInPage() {
2029                 global $wgUser, $wgOut, $wgTitle;
2030                 $skin = $wgUser->getSkin();
2031
2032                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
2033                 $loginLink = $skin->link(
2034                         $loginTitle,
2035                         wfMsgHtml( 'loginreqlink' ),
2036                         array(),
2037                         array( 'returnto' => $wgTitle->getPrefixedText() ),
2038                         array( 'known', 'noclasses' )
2039                 );
2040
2041                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
2042                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2043                 $wgOut->setArticleRelated( false );
2044
2045                 $wgOut->addHTML( wfMsgWikiHtml( 'whitelistedittext', $loginLink ) );
2046                 $wgOut->returnToMain( false, $wgTitle );
2047         }
2048
2049         /**
2050          * Creates a basic error page which informs the user that
2051          * they have attempted to edit a nonexistent section.
2052          */
2053         function noSuchSectionPage() {
2054                 global $wgOut;
2055
2056                 $wgOut->setPageTitle( wfMsg( 'nosuchsectiontitle' ) );
2057                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2058                 $wgOut->setArticleRelated( false );
2059
2060                 $res = wfMsgExt( 'nosuchsectiontext', 'parse', $this->section );
2061                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
2062                 $wgOut->addHTML( $res );
2063
2064                 $wgOut->returnToMain( false, $this->mTitle );
2065         }
2066
2067         /**
2068          * Produce the stock "your edit contains spam" page
2069          *
2070          * @param $match Text which triggered one or more filters
2071          */
2072         function spamPage( $match = false ) {
2073                 global $wgOut, $wgTitle;
2074
2075                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
2076                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2077                 $wgOut->setArticleRelated( false );
2078
2079                 $wgOut->addHTML( '<div id="spamprotected">' );
2080                 $wgOut->addWikiMsg( 'spamprotectiontext' );
2081                 if ( $match )
2082                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
2083                 $wgOut->addHTML( '</div>' );
2084
2085                 $wgOut->returnToMain( false, $wgTitle );
2086         }
2087
2088         /**
2089          * @private
2090          * @todo document
2091          */
2092         function mergeChangesInto( &$editText ){
2093                 wfProfileIn( __METHOD__ );
2094
2095                 $db = wfGetDB( DB_MASTER );
2096
2097                 // This is the revision the editor started from
2098                 $baseRevision = $this->getBaseRevision();
2099                 if ( is_null( $baseRevision ) ) {
2100                         wfProfileOut( __METHOD__ );
2101                         return false;
2102                 }
2103                 $baseText = $baseRevision->getText();
2104
2105                 // The current state, we want to merge updates into it
2106                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2107                 if ( is_null( $currentRevision ) ) {
2108                         wfProfileOut( __METHOD__ );
2109                         return false;
2110                 }
2111                 $currentText = $currentRevision->getText();
2112
2113                 $result = '';
2114                 if ( wfMerge( $baseText, $editText, $currentText, $result ) ) {
2115                         $editText = $result;
2116                         wfProfileOut( __METHOD__ );
2117                         return true;
2118                 } else {
2119                         wfProfileOut( __METHOD__ );
2120                         return false;
2121                 }
2122         }
2123
2124         /**
2125          * Check if the browser is on a blacklist of user-agents known to
2126          * mangle UTF-8 data on form submission. Returns true if Unicode
2127          * should make it through, false if it's known to be a problem.
2128          * @return bool
2129          * @private
2130          */
2131         function checkUnicodeCompliantBrowser() {
2132                 global $wgBrowserBlackList;
2133                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
2134                         // No User-Agent header sent? Trust it by default...
2135                         return true;
2136                 }
2137                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
2138                 foreach ( $wgBrowserBlackList as $browser ) {
2139                         if ( preg_match($browser, $currentbrowser) ) {
2140                                 return false;
2141                         }
2142                 }
2143                 return true;
2144         }
2145
2146         /**
2147          * @deprecated use $wgParser->stripSectionName()
2148          */
2149         function pseudoParseSectionAnchor( $text ) {
2150                 global $wgParser;
2151                 return $wgParser->stripSectionName( $text );
2152         }
2153
2154         /**
2155          * Format an anchor fragment as it would appear for a given section name
2156          * @param string $text
2157          * @return string
2158          * @private
2159          */
2160         function sectionAnchor( $text ) {
2161                 global $wgParser;
2162                 return $wgParser->guessSectionNameFromWikiText( $text );
2163         }
2164
2165         /**
2166          * Shows a bulletin board style toolbar for common editing functions.
2167          * It can be disabled in the user preferences.
2168          * The necessary JavaScript code can be found in skins/common/edit.js.
2169          *
2170          * @return string
2171          */
2172         static function getEditToolbar() {
2173                 global $wgStylePath, $wgContLang, $wgLang;
2174
2175                 /**
2176
2177                  * toolarray an array of arrays which each include the filename of
2178                  * the button image (without path), the opening tag, the closing tag,
2179                  * and optionally a sample text that is inserted between the two when no
2180                  * selection is highlighted.
2181                  * The tip text is shown when the user moves the mouse over the button.
2182                  *
2183                  * Already here are accesskeys (key), which are not used yet until someone
2184                  * can figure out a way to make them work in IE. However, we should make
2185                  * sure these keys are not defined on the edit page.
2186                  */
2187                 $toolarray = array(
2188                         array(
2189                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
2190                                 'id'     => 'mw-editbutton-bold',
2191                                 'open'   => '\'\'\'',
2192                                 'close'  => '\'\'\'',
2193                                 'sample' => wfMsg( 'bold_sample' ),
2194                                 'tip'    => wfMsg( 'bold_tip' ),
2195                                 'key'    => 'B'
2196                         ),
2197                         array(
2198                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
2199                                 'id'     => 'mw-editbutton-italic',
2200                                 'open'   => '\'\'',
2201                                 'close'  => '\'\'',
2202                                 'sample' => wfMsg( 'italic_sample' ),
2203                                 'tip'    => wfMsg( 'italic_tip' ),
2204                                 'key'    => 'I'
2205                         ),
2206                         array(
2207                                 'image'  => $wgLang->getImageFile( 'button-link' ),
2208                                 'id'     => 'mw-editbutton-link',
2209                                 'open'   => '[[',
2210                                 'close'  => ']]',
2211                                 'sample' => wfMsg( 'link_sample' ),
2212                                 'tip'    => wfMsg( 'link_tip' ),
2213                                 'key'    => 'L'
2214                         ),
2215                         array(
2216                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
2217                                 'id'     => 'mw-editbutton-extlink',
2218                                 'open'   => '[',
2219                                 'close'  => ']',
2220                                 'sample' => wfMsg( 'extlink_sample' ),
2221                                 'tip'    => wfMsg( 'extlink_tip' ),
2222                                 'key'    => 'X'
2223                         ),
2224                         array(
2225                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
2226                                 'id'     => 'mw-editbutton-headline',
2227                                 'open'   => "\n== ",
2228                                 'close'  => " ==\n",
2229                                 'sample' => wfMsg( 'headline_sample' ),
2230                                 'tip'    => wfMsg( 'headline_tip' ),
2231                                 'key'    => 'H'
2232                         ),
2233                         array(
2234                                 'image'  => $wgLang->getImageFile( 'button-image' ),
2235                                 'id'     => 'mw-editbutton-image',
2236                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
2237                                 'close'  => ']]',
2238                                 'sample' => wfMsg( 'image_sample' ),
2239                                 'tip'    => wfMsg( 'image_tip' ),
2240                                 'key'    => 'D'
2241                         ),
2242                         array(
2243                                 'image'  => $wgLang->getImageFile( 'button-media' ),
2244                                 'id'     => 'mw-editbutton-media',
2245                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
2246                                 'close'  => ']]',
2247                                 'sample' => wfMsg( 'media_sample' ),
2248                                 'tip'    => wfMsg( 'media_tip' ),
2249                                 'key'    => 'M'
2250                         ),
2251                         array(
2252                                 'image'  => $wgLang->getImageFile( 'button-math' ),
2253                                 'id'     => 'mw-editbutton-math',
2254                                 'open'   => "<math>",
2255                                 'close'  => "</math>",
2256                                 'sample' => wfMsg( 'math_sample' ),
2257                                 'tip'    => wfMsg( 'math_tip' ),
2258                                 'key'    => 'C'
2259                         ),
2260                         array(
2261                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
2262                                 'id'     => 'mw-editbutton-nowiki',
2263                                 'open'   => "<nowiki>",
2264                                 'close'  => "</nowiki>",
2265                                 'sample' => wfMsg( 'nowiki_sample' ),
2266                                 'tip'    => wfMsg( 'nowiki_tip' ),
2267                                 'key'    => 'N'
2268                         ),
2269                         array(
2270                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
2271                                 'id'     => 'mw-editbutton-signature',
2272                                 'open'   => '--~~~~',
2273                                 'close'  => '',
2274                                 'sample' => '',
2275                                 'tip'    => wfMsg( 'sig_tip' ),
2276                                 'key'    => 'Y'
2277                         ),
2278                         array(
2279                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
2280                                 'id'     => 'mw-editbutton-hr',
2281                                 'open'   => "\n----\n",
2282                                 'close'  => '',
2283                                 'sample' => '',
2284                                 'tip'    => wfMsg( 'hr_tip' ),
2285                                 'key'    => 'R'
2286                         )
2287                 );
2288                 $toolbar = "<div id='toolbar'>\n";
2289
2290                 $script = '';
2291                 foreach ( $toolarray as $tool ) {
2292                         $params = array(
2293                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
2294                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
2295                                 // Older browsers show a "speedtip" type message only for ALT.
2296                                 // Ideally these should be different, realistically they
2297                                 // probably don't need to be.
2298                                 $tip = $tool['tip'],
2299                                 $open = $tool['open'],
2300                                 $close = $tool['close'],
2301                                 $sample = $tool['sample'],
2302                                 $cssId = $tool['id'],
2303                         );
2304
2305                         $paramList = implode( ',',
2306                                 array_map( array( 'Xml', 'encodeJsVar' ), $params ) );
2307                         $script .= "addButton($paramList);\n";
2308                 }
2309                 $toolbar .= Html::inlineScript( "\n$script\n" );
2310
2311                 $toolbar .= "\n</div>";
2312
2313                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
2314
2315                 return $toolbar;
2316         }
2317
2318         /**
2319          * Returns an array of html code of the following checkboxes:
2320          * minor and watch
2321          *
2322          * @param $tabindex Current tabindex
2323          * @param $skin Skin object
2324          * @param $checked Array of checkbox => bool, where bool indicates the checked
2325          *                 status of the checkbox
2326          *
2327          * @return array
2328          */
2329         public function getCheckboxes( &$tabindex, $skin, $checked ) {
2330                 global $wgUser;
2331
2332                 $checkboxes = array();
2333
2334                 $checkboxes['minor'] = '';
2335                 $minorLabel = wfMsgExt( 'minoredit', array( 'parseinline' ) );
2336                 if ( $wgUser->isAllowed( 'minoredit' ) ) {
2337                         $attribs = array(
2338                                 'tabindex'  => ++$tabindex,
2339                                 'accesskey' => wfMsg( 'accesskey-minoredit' ),
2340                                 'id'        => 'wpMinoredit',
2341                         );
2342                         $checkboxes['minor'] =
2343                                 Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
2344                                 "&nbsp;<label for='wpMinoredit'" . $skin->tooltip( 'minoredit', 'withaccess' ) . ">{$minorLabel}</label>";
2345                 }
2346
2347                 $watchLabel = wfMsgExt( 'watchthis', array( 'parseinline' ) );
2348                 $checkboxes['watch'] = '';
2349                 if ( $wgUser->isLoggedIn() ) {
2350                         $attribs = array(
2351                                 'tabindex'  => ++$tabindex,
2352                                 'accesskey' => wfMsg( 'accesskey-watch' ),
2353                                 'id'        => 'wpWatchthis',
2354                         );
2355                         $checkboxes['watch'] =
2356                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
2357                                 "&nbsp;<label for='wpWatchthis'" . $skin->tooltip( 'watch', 'withaccess' ) . ">{$watchLabel}</label>";
2358                 }
2359                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
2360                 return $checkboxes;
2361         }
2362
2363         /**
2364          * Returns an array of html code of the following buttons:
2365          * save, diff, preview and live
2366          *
2367          * @param $tabindex Current tabindex
2368          *
2369          * @return array
2370          */
2371         public function getEditButtons(&$tabindex) {
2372                 $buttons = array();
2373
2374                 $temp = array(
2375                         'id'        => 'wpSave',
2376                         'name'      => 'wpSave',
2377                         'type'      => 'submit',
2378                         'tabindex'  => ++$tabindex,
2379                         'value'     => wfMsg( 'savearticle' ),
2380                         'accesskey' => wfMsg( 'accesskey-save' ),
2381                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
2382                 );
2383                 $buttons['save'] = Xml::element('input', $temp, '');
2384
2385                 ++$tabindex; // use the same for preview and live preview
2386                 $temp = array(
2387                         'id'        => 'wpPreview',
2388                         'name'      => 'wpPreview',
2389                         'type'      => 'submit',
2390                         'tabindex'  => $tabindex,
2391                         'value'     => wfMsg( 'showpreview' ),
2392                         'accesskey' => wfMsg( 'accesskey-preview' ),
2393                         'title'     => wfMsg( 'tooltip-preview' ) . ' [' . wfMsg( 'accesskey-preview' ) . ']',
2394                 );
2395                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
2396                 $buttons['live'] = '';
2397
2398                 $temp = array(
2399                         'id'        => 'wpDiff',
2400                         'name'      => 'wpDiff',
2401                         'type'      => 'submit',
2402                         'tabindex'  => ++$tabindex,
2403                         'value'     => wfMsg( 'showdiff' ),
2404                         'accesskey' => wfMsg( 'accesskey-diff' ),
2405                         'title'     => wfMsg( 'tooltip-diff' ) . ' [' . wfMsg( 'accesskey-diff' ) . ']',
2406                 );
2407                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
2408
2409                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
2410                 return $buttons;
2411         }
2412
2413         /**
2414          * Output preview text only. This can be sucked into the edit page
2415          * via JavaScript, and saves the server time rendering the skin as
2416          * well as theoretically being more robust on the client (doesn't
2417          * disturb the edit box's undo history, won't eat your text on
2418          * failure, etc).
2419          *
2420          * @todo This doesn't include category or interlanguage links.
2421          *       Would need to enhance it a bit, <s>maybe wrap them in XML
2422          *       or something...</s> that might also require more skin
2423          *       initialization, so check whether that's a problem.
2424          */
2425         function livePreview() {
2426                 global $wgOut;
2427                 $wgOut->disable();
2428                 header( 'Content-type: text/xml; charset=utf-8' );
2429                 header( 'Cache-control: no-cache' );
2430
2431                 $previewText = $this->getPreviewText();
2432                 #$categories = $skin->getCategoryLinks();
2433
2434                 $s =
2435                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
2436                 Xml::tags( 'livepreview', null,
2437                         Xml::element( 'preview', null, $previewText )
2438                         #.      Xml::element( 'category', null, $categories )
2439                 );
2440                 echo $s;
2441         }
2442
2443
2444         public function getCancelLink() {
2445                 global $wgUser, $wgTitle;
2446
2447                 $cancelParams = array();
2448                 if ( !$this->isConflict && $this->mArticle->getOldID() > 0 ) {
2449                         $cancelParams['oldid'] = $this->mArticle->getOldID();
2450                 }
2451
2452                 return $wgUser->getSkin()->link(
2453                         $wgTitle,
2454                         wfMsgExt( 'cancel', array( 'parseinline' ) ),
2455                         array( 'id' => 'mw-editform-cancel' ),
2456                         $cancelParams,
2457                         array( 'known', 'noclasses' )
2458                 );
2459         }
2460
2461         /**
2462          * Get a diff between the current contents of the edit box and the
2463          * version of the page we're editing from.
2464          *
2465          * If this is a section edit, we'll replace the section as for final
2466          * save and then make a comparison.
2467          */
2468         function showDiff() {
2469                 $oldtext = $this->mArticle->fetchContent();
2470                 $newtext = $this->mArticle->replaceSection(
2471                         $this->section, $this->textbox1, $this->summary, $this->edittime );
2472                 $newtext = $this->mArticle->preSaveTransform( $newtext );
2473                 $oldtitle = wfMsgExt( 'currentrev', array( 'parseinline' ) );
2474                 $newtitle = wfMsgExt( 'yourtext', array( 'parseinline' ) );
2475                 if ( $oldtext !== false  || $newtext != '' ) {
2476                         $de = new DifferenceEngine( $this->mTitle );
2477                         $de->setText( $oldtext, $newtext );
2478                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2479                         $de->showDiffStyle();
2480                 } else {
2481                         $difftext = '';
2482                 }
2483
2484                 global $wgOut;
2485                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2486         }
2487
2488         /**
2489          * Filter an input field through a Unicode de-armoring process if it
2490          * came from an old browser with known broken Unicode editing issues.
2491          *
2492          * @param WebRequest $request
2493          * @param string $field
2494          * @return string
2495          * @private
2496          */
2497         function safeUnicodeInput( $request, $field ) {
2498                 $text = rtrim( $request->getText( $field ) );
2499                 return $request->getBool( 'safemode' )
2500                         ? $this->unmakesafe( $text )
2501                         : $text;
2502         }
2503
2504         function safeUnicodeText( $request, $text ) {
2505                 $text = rtrim( $text );
2506                 return $request->getBool( 'safemode' )
2507                         ? $this->unmakesafe( $text )
2508                         : $text;
2509         }
2510
2511         /**
2512          * Filter an output field through a Unicode armoring process if it is
2513          * going to an old browser with known broken Unicode editing issues.
2514          *
2515          * @param string $text
2516          * @return string
2517          * @private
2518          */
2519         function safeUnicodeOutput( $text ) {
2520                 global $wgContLang;
2521                 $codedText = $wgContLang->recodeForEdit( $text );
2522                 return $this->checkUnicodeCompliantBrowser()
2523                         ? $codedText
2524                         : $this->makesafe( $codedText );
2525         }
2526
2527         /**
2528          * A number of web browsers are known to corrupt non-ASCII characters
2529          * in a UTF-8 text editing environment. To protect against this,
2530          * detected browsers will be served an armored version of the text,
2531          * with non-ASCII chars converted to numeric HTML character references.
2532          *
2533          * Preexisting such character references will have a 0 added to them
2534          * to ensure that round-trips do not alter the original data.
2535          *
2536          * @param string $invalue
2537          * @return string
2538          * @private
2539          */
2540         function makesafe( $invalue ) {
2541                 // Armor existing references for reversability.
2542                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
2543
2544                 $bytesleft = 0;
2545                 $result = "";
2546                 $working = 0;
2547                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2548                         $bytevalue = ord( $invalue{$i} );
2549                         if ( $bytevalue <= 0x7F ) { //0xxx xxxx
2550                                 $result .= chr( $bytevalue );
2551                                 $bytesleft = 0;
2552                         } elseif ( $bytevalue <= 0xBF ) { //10xx xxxx
2553                                 $working = $working << 6;
2554                                 $working += ($bytevalue & 0x3F);
2555                                 $bytesleft--;
2556                                 if ( $bytesleft <= 0 ) {
2557                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
2558                                 }
2559                         } elseif ( $bytevalue <= 0xDF ) { //110x xxxx
2560                                 $working = $bytevalue & 0x1F;
2561                                 $bytesleft = 1;
2562                         } elseif ( $bytevalue <= 0xEF ) { //1110 xxxx
2563                                 $working = $bytevalue & 0x0F;
2564                                 $bytesleft = 2;
2565                         } else { //1111 0xxx
2566                                 $working = $bytevalue & 0x07;
2567                                 $bytesleft = 3;
2568                         }
2569                 }
2570                 return $result;
2571         }
2572
2573         /**
2574          * Reverse the previously applied transliteration of non-ASCII characters
2575          * back to UTF-8. Used to protect data from corruption by broken web browsers
2576          * as listed in $wgBrowserBlackList.
2577          *
2578          * @param string $invalue
2579          * @return string
2580          * @private
2581          */
2582         function unmakesafe( $invalue ) {
2583                 $result = "";
2584                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2585                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue{$i+3} != '0' ) ) {
2586                                 $i += 3;
2587                                 $hexstring = "";
2588                                 do {
2589                                         $hexstring .= $invalue{$i};
2590                                         $i++;
2591                                 } while( ctype_xdigit( $invalue{$i} ) && ( $i < strlen( $invalue ) ) );
2592
2593                                 // Do some sanity checks. These aren't needed for reversability,
2594                                 // but should help keep the breakage down if the editor
2595                                 // breaks one of the entities whilst editing.
2596                                 if ( (substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6) ) {
2597                                         $codepoint = hexdec($hexstring);
2598                                         $result .= codepointToUtf8( $codepoint );
2599                                 } else {
2600                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
2601                                 }
2602                         } else {
2603                                 $result .= substr( $invalue, $i, 1 );
2604                         }
2605                 }
2606                 // reverse the transform that we made for reversability reasons.
2607                 return strtr( $result, array( "&#x0" => "&#x" ) );
2608         }
2609
2610         function noCreatePermission() {
2611                 global $wgOut;
2612                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
2613                 $wgOut->addWikiMsg( 'nocreatetext' );
2614         }
2615
2616         /**
2617          * Attempt submission
2618          * @return bool false if output is done, true if the rest of the form should be displayed
2619          */
2620         function attemptSave() {
2621                 global $wgUser, $wgOut, $wgTitle;
2622
2623                 $resultDetails = false;
2624                 # Allow bots to exempt some edits from bot flagging
2625                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
2626                 $value = $this->internalAttemptSave( $resultDetails, $bot );
2627
2628                 if ( $value == self::AS_SUCCESS_UPDATE || $value == self::AS_SUCCESS_NEW_ARTICLE ) {
2629                         $this->didSave = true;
2630                 }
2631
2632                 switch ( $value ) {
2633                         case self::AS_HOOK_ERROR_EXPECTED:
2634                         case self::AS_CONTENT_TOO_BIG:
2635                         case self::AS_ARTICLE_WAS_DELETED:
2636                         case self::AS_CONFLICT_DETECTED:
2637                         case self::AS_SUMMARY_NEEDED:
2638                         case self::AS_TEXTBOX_EMPTY:
2639                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
2640                         case self::AS_END:
2641                                 return true;
2642
2643                         case self::AS_HOOK_ERROR:
2644                         case self::AS_FILTERING:
2645                         case self::AS_SUCCESS_NEW_ARTICLE:
2646                         case self::AS_SUCCESS_UPDATE:
2647                                 return false;
2648
2649                         case self::AS_SPAM_ERROR:
2650                                 $this->spamPage( $resultDetails['spam'] );
2651                                 return false;
2652
2653                         case self::AS_BLOCKED_PAGE_FOR_USER:
2654                                 $this->blockedPage();
2655                                 return false;
2656
2657                         case self::AS_IMAGE_REDIRECT_ANON:
2658                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
2659                                 return false;
2660
2661                         case self::AS_READ_ONLY_PAGE_ANON:
2662                                 $this->userNotLoggedInPage();
2663                                 return false;
2664
2665                         case self::AS_READ_ONLY_PAGE_LOGGED:
2666                         case self::AS_READ_ONLY_PAGE:
2667                                 $wgOut->readOnlyPage();
2668                                 return false;
2669
2670                         case self::AS_RATE_LIMITED:
2671                                 $wgOut->rateLimited();
2672                                 return false;
2673
2674                         case self::AS_NO_CREATE_PERMISSION:
2675                                 $this->noCreatePermission();
2676                                 return;
2677
2678                         case self::AS_BLANK_ARTICLE:
2679                                 $wgOut->redirect( $wgTitle->getFullURL() );
2680                                 return false;
2681
2682                         case self::AS_IMAGE_REDIRECT_LOGGED:
2683                                 $wgOut->permissionRequired( 'upload' );
2684                                 return false;
2685                 }
2686         }
2687
2688         function getBaseRevision() {
2689                 if ( $this->mBaseRevision == false ) {
2690                         $db = wfGetDB( DB_MASTER );
2691                         $baseRevision = Revision::loadFromTimestamp(
2692                                 $db, $this->mTitle, $this->edittime );
2693                         return $this->mBaseRevision = $baseRevision;
2694                 } else {
2695                         return $this->mBaseRevision;
2696                 }
2697         }
2698 }