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  * $this->mContextTitle 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  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  20  * headaches, which may be fatal.
  21  */
  22 class EditPage {
  23         const AS_SUCCESS_UPDATE            = 200;
  24         const AS_SUCCESS_NEW_ARTICLE       = 201;
  25         const AS_HOOK_ERROR                = 210;
  26         const AS_FILTERING                 = 211;
  27         const AS_HOOK_ERROR_EXPECTED       = 212;
  28         const AS_BLOCKED_PAGE_FOR_USER     = 215;
  29         const AS_CONTENT_TOO_BIG           = 216;
  30         const AS_USER_CANNOT_EDIT          = 217;
  31         const AS_READ_ONLY_PAGE_ANON       = 218;
  32         const AS_READ_ONLY_PAGE_LOGGED     = 219;
  33         const AS_READ_ONLY_PAGE            = 220;
  34         const AS_RATE_LIMITED              = 221;
  35         const AS_ARTICLE_WAS_DELETED       = 222;
  36         const AS_NO_CREATE_PERMISSION      = 223;
  37         const AS_BLANK_ARTICLE             = 224;
  38         const AS_CONFLICT_DETECTED         = 225;
  39         const AS_SUMMARY_NEEDED            = 226;
  40         const AS_TEXTBOX_EMPTY             = 228;
  41         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
  42         const AS_OK                        = 230;
  43         const AS_END                       = 231;
  44         const AS_SPAM_ERROR                = 232;
  45         const AS_IMAGE_REDIRECT_ANON       = 233;
  46         const AS_IMAGE_REDIRECT_LOGGED     = 234;
  47
  48         /**
  49          * @var Article
  50          */
  51         var $mArticle;
  52
  53         /**
  54          * @var Title
  55          */
  56         var $mTitle;
  57         private $mContextTitle = null;
  58         var $action;
  59         var $isConflict = false;
  60         var $isCssJsSubpage = false;
  61         var $isCssSubpage = false;
  62         var $isJsSubpage = false;
  63         var $isWrongCaseCssJsPage = false;
  64         var $isNew = false; // new page or new section
  65         var $deletedSinceEdit;
  66         var $formtype;
  67         var $firsttime;
  68         var $lastDelete;
  69         var $mTokenOk = false;
  70         var $mTokenOkExceptSuffix = false;
  71         var $mTriedSave = false;
  72         var $incompleteForm = false;
  73         var $tooBig = false;
  74         var $kblength = false;
  75         var $missingComment = false;
  76         var $missingSummary = false;
  77         var $allowBlankSummary = false;
  78         var $autoSumm = '';
  79         var $hookError = '';
  80         #var $mPreviewTemplates;
  81
  82         /**
  83          * @var ParserOutput
  84          */
  85         var $mParserOutput;
  86
  87         var $mBaseRevision = false;
  88         var $mShowSummaryField = true;
  89
  90         # Form values
  91         var $save = false, $preview = false, $diff = false;
  92         var $minoredit = false, $watchthis = false, $recreate = false;
  93         var $textbox1 = '', $textbox2 = '', $summary = '', $nosummary = false;
  94         var $edittime = '', $section = '', $starttime = '';
  95         var $oldid = 0, $editintro = '', $scrolltop = null, $bot = true;
  96
  97         # Placeholders for text injection by hooks (must be HTML)
  98         # extensions should take care to _append_ to the present value
  99         public $editFormPageTop; // Before even the preview
 100         public $editFormTextTop;
 101         public $editFormTextBeforeContent;
 102         public $editFormTextAfterWarn;
 103         public $editFormTextAfterTools;
 104         public $editFormTextBottom;
 105         public $editFormTextAfterContent;
 106         public $previewTextAfterContent;
 107         public $mPreloadText;
 108
 109         /* $didSave should be set to true whenever an article was succesfully altered. */
 110         public $didSave = false;
 111         public $undidRev = 0;
 112
 113         public $suppressIntro = false;
 114
 115         /**
 116          * @todo document
 117          * @param $article Article
 118          */
 119         function __construct( $article ) {
 120                 $this->mArticle =& $article;
 121                 $this->mTitle = $article->getTitle();
 122                 $this->action = 'submit';
 123
 124                 # Placeholders for text injection by hooks (empty per default)
 125                 $this->editFormPageTop =
 126                 $this->editFormTextTop =
 127                 $this->editFormTextBeforeContent =
 128                 $this->editFormTextAfterWarn =
 129                 $this->editFormTextAfterTools =
 130                 $this->editFormTextBottom =
 131                 $this->editFormTextAfterContent =
 132                 $this->previewTextAfterContent =
 133                 $this->mPreloadText = "";
 134         }
 135
 136         /**
 137          * @return Article
 138          */
 139         function getArticle() {
 140                 return $this->mArticle;
 141         }
 142
 143         /**
 144          * Set the context Title object
 145          *
 146          * @param $title Title object or null
 147          */
 148         public function setContextTitle( $title ) {
 149                 $this->mContextTitle = $title;
 150         }
 151
 152         /**
 153          * Get the context title object.
 154          * If not set, $wgTitle will be returned. This behavior might changed in
 155          * the future to return $this->mTitle instead.
 156          *
 157          * @return Title object
 158          */
 159         public function getContextTitle() {
 160                 if ( is_null( $this->mContextTitle ) ) {
 161                         global $wgTitle;
 162                         return $wgTitle;
 163                 } else {
 164                         return $this->mContextTitle;
 165                 }
 166         }
 167
 168         /**
 169          * Fetch initial editing page content.
 170          *
 171          * @param $def_text string
 172          * @returns mixed string on success, $def_text for invalid sections
 173          * @private
 174          */
 175         function getContent( $def_text = '' ) {
 176                 global $wgOut, $wgRequest, $wgParser;
 177
 178                 wfProfileIn( __METHOD__ );
 179                 # Get variables from query string :P
 180                 $section = $wgRequest->getVal( 'section' );
 181
 182                 $preload = $wgRequest->getVal( 'preload',
 183                         // Custom preload text for new sections
 184                         $section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 185                 $undoafter = $wgRequest->getVal( 'undoafter' );
 186                 $undo = $wgRequest->getVal( 'undo' );
 187
 188                 // For message page not locally set, use the i18n message.
 189                 // For other non-existent articles, use preload text if any.
 190                 if ( !$this->mTitle->exists() ) {
 191                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 192                                 # If this is a system message, get the default text.
 193                                 $text = $this->mTitle->getDefaultMessageText();
 194                                 if( $text === false ) {
 195                                         $text = $this->getPreloadedText( $preload );
 196                                 }
 197                         } else {
 198                                 # If requested, preload some text.
 199                                 $text = $this->getPreloadedText( $preload );
 200                         }
 201                 // For existing pages, get text based on "undo" or section parameters.
 202                 } else {
 203                         $text = $this->mArticle->getContent();
 204                         if ( $undo > 0 && $undoafter > 0 && $undo < $undoafter ) {
 205                                 # If they got undoafter and undo round the wrong way, switch them
 206                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 207                         }
 208                         if ( $undo > 0 && $undo > $undoafter ) {
 209                                 # Undoing a specific edit overrides section editing; section-editing
 210                                 # doesn't work with undoing.
 211                                 if ( $undoafter ) {
 212                                         $undorev = Revision::newFromId( $undo );
 213                                         $oldrev = Revision::newFromId( $undoafter );
 214                                 } else {
 215                                         $undorev = Revision::newFromId( $undo );
 216                                         $oldrev = $undorev ? $undorev->getPrevious() : null;
 217                                 }
 218
 219                                 # Sanity check, make sure it's the right page,
 220                                 # the revisions exist and they were not deleted.
 221                                 # Otherwise, $text will be left as-is.
 222                                 if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 223                                         $undorev->getPage() == $oldrev->getPage() &&
 224                                         $undorev->getPage() == $this->mArticle->getID() &&
 225                                         !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 226                                         !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 227
 228                                         $undotext = $this->mArticle->getUndoText( $undorev, $oldrev );
 229                                         if ( $undotext === false ) {
 230                                                 # Warn the user that something went wrong
 231                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-failure">' .
 232                                                         wfMsgNoTrans( 'undo-failure' ) . '</div>', true, /* interface */true );
 233                                         } else {
 234                                                 $text = $undotext;
 235                                                 # Inform the user of our success and set an automatic edit summary
 236                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="mw-undo-success">' .
 237                                                         wfMsgNoTrans( 'undo-success' ) . '</div>', true, /* interface */true );
 238                                                 $firstrev = $oldrev->getNext();
 239                                                 # If we just undid one rev, use an autosummary
 240                                                 if ( $firstrev->mId == $undo ) {
 241                                                         $this->summary = wfMsgForContent( 'undo-summary', $undo, $undorev->getUserText() );
 242                                                         $this->undidRev = $undo;
 243                                                 }
 244                                                 $this->formtype = 'diff';
 245                                         }
 246                                 } else {
 247                                         // Failed basic sanity checks.
 248                                         // Older revisions may have been removed since the link
 249                                         // was created, or we may simply have got bogus input.
 250                                         $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-norev">' .
 251                                                 wfMsgNoTrans( 'undo-norev' ) . '</div>', true, /* interface */true );
 252                                 }
 253                         } elseif ( $section != '' ) {
 254                                 if ( $section == 'new' ) {
 255                                         $text = $this->getPreloadedText( $preload );
 256                                 } else {
 257                                         // Get section edit text (returns $def_text for invalid sections)
 258                                         $text = $wgParser->getSection( $text, $section, $def_text );
 259                                 }
 260                         }
 261                 }
 262
 263                 wfProfileOut( __METHOD__ );
 264                 return $text;
 265         }
 266
 267         /**
 268          * Use this method before edit() to preload some text into the edit box
 269          *
 270          * @param $text string
 271          */
 272         public function setPreloadedText( $text ) {
 273                 $this->mPreloadText = $text;
 274         }
 275
 276         /**
 277          * Get the contents to be preloaded into the box, either set by
 278          * an earlier setPreloadText() or by loading the given page.
 279          *
 280          * @param $preload String: representing the title to preload from.
 281          * @return String
 282          */
 283         protected function getPreloadedText( $preload ) {
 284                 global $wgUser, $wgParser;
 285                 if ( !empty( $this->mPreloadText ) ) {
 286                         return $this->mPreloadText;
 287                 } elseif ( $preload !== '' ) {
 288                         $title = Title::newFromText( $preload );
 289                         # Check for existence to avoid getting MediaWiki:Noarticletext
 290                         if ( isset( $title ) && $title->exists() && $title->userCanRead() ) {
 291                                 $article = new Article( $title );
 292
 293                                 if ( $article->isRedirect() ) {
 294                                         $title = Title::newFromRedirectRecurse( $article->getContent() );
 295                                         # Redirects to missing titles are displayed, to hidden pages are followed
 296                                         # Copying observed behaviour from ?action=view
 297                                         if ( $title->exists() ) {
 298                                                 if ($title->userCanRead() ) {
 299                                                         $article = new Article( $title );
 300                                                 } else {
 301                                                         return "";
 302                                                 }
 303                                         }
 304                                 }
 305                                 $parserOptions = ParserOptions::newFromUser( $wgUser );
 306                                 return $wgParser->getPreloadText( $article->getContent(), $title, $parserOptions );
 307                         }
 308                 }
 309                 return '';
 310         }
 311
 312         /**
 313          * Check if a page was deleted while the user was editing it, before submit.
 314          * Note that we rely on the logging table, which hasn't been always there,
 315          * but that doesn't matter, because this only applies to brand new
 316          * deletes.
 317          */
 318         protected function wasDeletedSinceLastEdit() {
 319                 if ( $this->deletedSinceEdit !== null ) {
 320                         return $this->deletedSinceEdit;
 321                 }
 322
 323                 $this->deletedSinceEdit = false;
 324
 325                 if ( $this->mTitle->isDeletedQuick() ) {
 326                         $this->lastDelete = $this->getLastDelete();
 327                         if ( $this->lastDelete ) {
 328                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
 329                                 if ( $deleteTime > $this->starttime ) {
 330                                         $this->deletedSinceEdit = true;
 331                                 }
 332                         }
 333                 }
 334
 335                 return $this->deletedSinceEdit;
 336         }
 337
 338         /**
 339          * Checks whether the user entered a skin name in uppercase,
 340          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 341          *
 342          * @return bool
 343          */
 344         protected function isWrongCaseCssJsPage() {
 345                 if( $this->mTitle->isCssJsSubpage() ) {
 346                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 347                         $skins = array_merge(
 348                                 array_keys( Skin::getSkinNames() ),
 349                                 array( 'common' )
 350                         );
 351                         return !in_array( $name, $skins )
 352                                 && in_array( strtolower( $name ), $skins );
 353                 } else {
 354                         return false;
 355                 }
 356         }
 357
 358         function submit() {
 359                 $this->edit();
 360         }
 361
 362         /**
 363          * This is the function that gets called for "action=edit". It
 364          * sets up various member variables, then passes execution to
 365          * another function, usually showEditForm()
 366          *
 367          * The edit form is self-submitting, so that when things like
 368          * preview and edit conflicts occur, we get the same form back
 369          * with the extra stuff added.  Only when the final submission
 370          * is made and all is well do we actually save and redirect to
 371          * the newly-edited page.
 372          */
 373         function edit() {
 374                 global $wgOut, $wgRequest, $wgUser;
 375                 // Allow extensions to modify/prevent this form or submission
 376                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 377                         return;
 378                 }
 379
 380                 wfProfileIn( __METHOD__ );
 381                 wfDebug( __METHOD__.": enter\n" );
 382
 383                 $this->importFormData( $wgRequest );
 384                 $this->firsttime = false;
 385
 386                 if ( $this->live ) {
 387                         $this->livePreview();
 388                         wfProfileOut( __METHOD__ );
 389                         return;
 390                 }
 391
 392                 if ( wfReadOnly() && $this->save ) {
 393                         // Force preview
 394                         $this->save = false;
 395                         $this->preview = true;
 396                 }
 397
 398                 $wgOut->addModules( array( 'mediawiki.action.edit' ) );
 399
 400                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
 401                         $wgOut->addModules( 'mediawiki.legacy.preview' );
 402                 }
 403                 // Bug #19334: textarea jumps when editing articles in IE8
 404                 $wgOut->addStyle( 'common/IE80Fixes.css', 'screen', 'IE 8' );
 405
 406                 $permErrors = $this->getEditPermissionErrors();
 407                 if ( $permErrors ) {
 408                         // Auto-block user's IP if the account was "hard" blocked
 409                         $wgUser->spreadAnyEditBlock();
 410
 411                         wfDebug( __METHOD__ . ": User can't edit\n" );
 412                         $content = $this->getContent( null );
 413                         $content = $content === '' ? null : $content;
 414                         $this->readOnlyPage( $content, true, $permErrors, 'edit' );
 415                         wfProfileOut( __METHOD__ );
 416                         return;
 417                 } else {
 418                         if ( $this->save ) {
 419                                 $this->formtype = 'save';
 420                         } elseif ( $this->preview ) {
 421                                 $this->formtype = 'preview';
 422                         } elseif ( $this->diff ) {
 423                                 $this->formtype = 'diff';
 424                         } else { # First time through
 425                                 $this->firsttime = true;
 426                                 if ( $this->previewOnOpen() ) {
 427                                         $this->formtype = 'preview';
 428                                 } else {
 429                                         $this->formtype = 'initial';
 430                                 }
 431                         }
 432                 }
 433
 434                 // If they used redlink=1 and the page exists, redirect to the main article
 435                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 436                         $wgOut->redirect( $this->mTitle->getFullURL() );
 437                 }
 438
 439                 wfProfileIn( __METHOD__."-business-end" );
 440
 441                 $this->isConflict = false;
 442                 // css / js subpages of user pages get a special treatment
 443                 $this->isCssJsSubpage       = $this->mTitle->isCssJsSubpage();
 444                 $this->isCssSubpage         = $this->mTitle->isCssSubpage();
 445                 $this->isJsSubpage          = $this->mTitle->isJsSubpage();
 446                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 447                 $this->isNew                = !$this->mTitle->exists() || $this->section == 'new';
 448
 449                 # Show applicable editing introductions
 450                 if ( $this->formtype == 'initial' || $this->firsttime )
 451                         $this->showIntro();
 452
 453                 if ( $this->mTitle->isTalkPage() ) {
 454                         $wgOut->addWikiMsg( 'talkpagetext' );
 455                 }
 456
 457                 # Optional notices on a per-namespace and per-page basis
 458                 $editnotice_ns   = 'editnotice-'.$this->mTitle->getNamespace();
 459                 $editnotice_ns_message = wfMessage( $editnotice_ns )->inContentLanguage();
 460                 if ( $editnotice_ns_message->exists() ) {
 461                         $wgOut->addWikiText( $editnotice_ns_message->plain() );
 462                 }
 463                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
 464                         $parts = explode( '/', $this->mTitle->getDBkey() );
 465                         $editnotice_base = $editnotice_ns;
 466                         while ( count( $parts ) > 0 ) {
 467                                 $editnotice_base .= '-'.array_shift( $parts );
 468                                 $editnotice_base_msg = wfMessage( $editnotice_base )->inContentLanguage();
 469                                 if ( $editnotice_base_msg->exists() ) {
 470                                         $wgOut->addWikiText( $editnotice_base_msg->plain()  );
 471                                 }
 472                         }
 473                 } else {
 474                         # Even if there are no subpages in namespace, we still don't want / in MW ns.
 475                         $editnoticeText = $editnotice_ns . '-' . str_replace( '/', '-', $this->mTitle->getDBkey() );
 476                         $editnoticeMsg = wfMessage( $editnoticeText )->inContentLanguage();
 477                         if ( $editnoticeMsg->exists() ) {
 478                                 $wgOut->addWikiText( $editnoticeMsg->plain() );
 479                         }
 480                 }
 481
 482                 # Attempt submission here.  This will check for edit conflicts,
 483                 # and redundantly check for locked database, blocked IPs, etc.
 484                 # that edit() already checked just in case someone tries to sneak
 485                 # in the back door with a hand-edited submission URL.
 486
 487                 if ( 'save' == $this->formtype ) {
 488                         if ( !$this->attemptSave() ) {
 489                                 wfProfileOut( __METHOD__."-business-end" );
 490                                 wfProfileOut( __METHOD__ );
 491                                 return;
 492                         }
 493                 }
 494
 495                 # First time through: get contents, set time for conflict
 496                 # checking, etc.
 497                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 498                         if ( $this->initialiseForm() === false ) {
 499                                 $this->noSuchSectionPage();
 500                                 wfProfileOut( __METHOD__."-business-end" );
 501                                 wfProfileOut( __METHOD__ );
 502                                 return;
 503                         }
 504                         if ( !$this->mTitle->getArticleId() )
 505                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 506                         else
 507                                 wfRunHooks( 'EditFormInitialText', array( $this ) );
 508                 }
 509
 510                 $this->showEditForm();
 511                 wfProfileOut( __METHOD__."-business-end" );
 512                 wfProfileOut( __METHOD__ );
 513         }
 514
 515         /**
 516          * @return array
 517          */
 518         protected function getEditPermissionErrors() {
 519                 global $wgUser;
 520                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 521                 # Can this title be created?
 522                 if ( !$this->mTitle->exists() ) {
 523                         $permErrors = array_merge( $permErrors,
 524                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 525                 }
 526                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 527                 $remove = array();
 528                 foreach( $permErrors as $error ) {
 529                         if ( ( $this->preview || $this->diff ) &&
 530                                 ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' ) )
 531                         {
 532                                 $remove[] = $error;
 533                         }
 534                 }
 535                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 536                 return $permErrors;
 537         }
 538
 539         /**
 540          * Show a read-only error
 541          * Parameters are the same as OutputPage:readOnlyPage()
 542          * Redirect to the article page if redlink=1
 543          */
 544         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 545                 global $wgRequest, $wgOut;
 546                 if ( $wgRequest->getBool( 'redlink' ) ) {
 547                         // The edit page was reached via a red link.
 548                         // Redirect to the article page and let them click the edit tab if
 549                         // they really want a permission error.
 550                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 551                 } else {
 552                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 553                 }
 554         }
 555
 556         /**
 557          * Should we show a preview when the edit form is first shown?
 558          *
 559          * @return bool
 560          */
 561         protected function previewOnOpen() {
 562                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 563                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 564                         // Explicit override from request
 565                         return true;
 566                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 567                         // Explicit override from request
 568                         return false;
 569                 } elseif ( $this->section == 'new' ) {
 570                         // Nothing *to* preview for new sections
 571                         return false;
 572                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 573                         // Standard preference behaviour
 574                         return true;
 575                 } elseif ( !$this->mTitle->exists() &&
 576                   isset($wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]) &&
 577                   $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 578                 {
 579                         // Categories are special
 580                         return true;
 581                 } else {
 582                         return false;
 583                 }
 584         }
 585
 586         /**
 587          * Does this EditPage class support section editing?
 588          * This is used by EditPage subclasses to indicate their ui cannot handle section edits
 589          *
 590          * @return bool
 591          */
 592         protected function isSectionEditSupported() {
 593                 return true;
 594         }
 595
 596         /**
 597          * Returns the URL to use in the form's action attribute.
 598          * This is used by EditPage subclasses when simply customizing the action
 599          * variable in the constructor is not enough. This can be used when the
 600          * EditPage lives inside of a Special page rather than a custom page action.
 601          *
 602          * @param $title Title object for which is being edited (where we go to for &action= links)
 603          * @return string
 604          */
 605         protected function getActionURL( Title $title ) {
 606                 return $title->getLocalURL( array( 'action' => $this->action ) );
 607         }
 608
 609         /**
 610          * @todo document
 611          * @param $request WebRequest
 612          */
 613         function importFormData( &$request ) {
 614                 global $wgLang, $wgUser;
 615
 616                 wfProfileIn( __METHOD__ );
 617
 618                 # Section edit can come from either the form or a link
 619                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 620
 621                 if ( $request->wasPosted() ) {
 622                         # These fields need to be checked for encoding.
 623                         # Also remove trailing whitespace, but don't remove _initial_
 624                         # whitespace from the text boxes. This may be significant formatting.
 625                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 626                         if ( !$request->getCheck('wpTextbox2') ) {
 627                                 // Skip this if wpTextbox2 has input, it indicates that we came
 628                                 // from a conflict page with raw page text, not a custom form
 629                                 // modified by subclasses
 630                                 wfProfileIn( get_class($this)."::importContentFormData" );
 631                                 $textbox1 = $this->importContentFormData( $request );
 632                                 if ( isset($textbox1) )
 633                                         $this->textbox1 = $textbox1;
 634                                 wfProfileOut( get_class($this)."::importContentFormData" );
 635                         }
 636
 637                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 638                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary' ), 250 );
 639
 640                         # Remove extra headings from summaries and new sections.
 641                         $this->summary = preg_replace('/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary);
 642
 643                         $this->edittime = $request->getVal( 'wpEdittime' );
 644                         $this->starttime = $request->getVal( 'wpStarttime' );
 645
 646                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 647
 648                         if ($this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null) {
 649                                 // wpTextbox1 field is missing, possibly due to being "too big"
 650                                 // according to some filter rules such as Suhosin's setting for
 651                                 // suhosin.request.max_value_length (d'oh)
 652                                 $this->incompleteForm = true;
 653                         } else {
 654                                 // edittime should be one of our last fields; if it's missing,
 655                                 // the submission probably broke somewhere in the middle.
 656                                 $this->incompleteForm = is_null( $this->edittime );
 657                         }
 658                         if ( $this->incompleteForm ) {
 659                                 # If the form is incomplete, force to preview.
 660                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 661                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 662                                 $this->preview = true;
 663                         } else {
 664                                 /* Fallback for live preview */
 665                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 666                                 $this->diff = $request->getCheck( 'wpDiff' );
 667
 668                                 // Remember whether a save was requested, so we can indicate
 669                                 // if we forced preview due to session failure.
 670                                 $this->mTriedSave = !$this->preview;
 671
 672                                 if ( $this->tokenOk( $request ) ) {
 673                                         # Some browsers will not report any submit button
 674                                         # if the user hits enter in the comment box.
 675                                         # The unmarked state will be assumed to be a save,
 676                                         # if the form seems otherwise complete.
 677                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 678                                 } elseif ( $this->diff ) {
 679                                         # Failed token check, but only requested "Show Changes".
 680                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 681                                 } else {
 682                                         # Page might be a hack attempt posted from
 683                                         # an external site. Preview instead of saving.
 684                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 685                                         $this->preview = true;
 686                                 }
 687                         }
 688                         $this->save = !$this->preview && !$this->diff;
 689                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 690                                 $this->edittime = null;
 691                         }
 692
 693                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 694                                 $this->starttime = null;
 695                         }
 696
 697                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 698
 699                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 700                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 701
 702                         # Don't force edit summaries when a user is editing their own user or talk page
 703                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 704                                 $this->mTitle->getText() == $wgUser->getName() )
 705                         {
 706                                 $this->allowBlankSummary = true;
 707                         } else {
 708                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary');
 709                         }
 710
 711                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 712                 } else {
 713                         # Not a posted form? Start with nothing.
 714                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 715                         $this->textbox1  = '';
 716                         $this->summary   = '';
 717                         $this->edittime  = '';
 718                         $this->starttime = wfTimestampNow();
 719                         $this->edit      = false;
 720                         $this->preview   = false;
 721                         $this->save      = false;
 722                         $this->diff      = false;
 723                         $this->minoredit = false;
 724                         $this->watchthis = $request->getBool( 'watchthis', false ); // Watch may be overriden by request parameters
 725                         $this->recreate  = false;
 726
 727                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 728                                 $this->summary = $request->getVal( 'preloadtitle' );
 729                         }
 730                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 731                                 $this->summary = $request->getText( 'summary' );
 732                         }
 733
 734                         if ( $request->getVal( 'minor' ) ) {
 735                                 $this->minoredit = true;
 736                         }
 737                 }
 738
 739                 $this->bot = $request->getBool( 'bot', true );
 740                 $this->nosummary = $request->getBool( 'nosummary' );
 741
 742                 // @todo FIXME: Unused variable?
 743                 $this->oldid = $request->getInt( 'oldid' );
 744
 745                 $this->live = $request->getCheck( 'live' );
 746                 $this->editintro = $request->getText( 'editintro',
 747                         // Custom edit intro for new sections
 748                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 749
 750                 // Allow extensions to modify form data
 751                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 752
 753                 wfProfileOut( __METHOD__ );
 754         }
 755
 756         /**
 757          * Subpage overridable method for extracting the page content data from the
 758          * posted form to be placed in $this->textbox1, if using customized input
 759          * this method should be overrided and return the page text that will be used
 760          * for saving, preview parsing and so on...
 761          *
 762          * @param $request WebRequest
 763          */
 764         protected function importContentFormData( &$request ) {
 765                 return; // Don't do anything, EditPage already extracted wpTextbox1
 766         }
 767
 768         /**
 769          * Make sure the form isn't faking a user's credentials.
 770          *
 771          * @param $request WebRequest
 772          * @return bool
 773          * @private
 774          */
 775         function tokenOk( &$request ) {
 776                 global $wgUser;
 777                 $token = $request->getVal( 'wpEditToken' );
 778                 $this->mTokenOk = $wgUser->matchEditToken( $token );
 779                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
 780                 return $this->mTokenOk;
 781         }
 782
 783         /**
 784          * Show all applicable editing introductions
 785          */
 786         protected function showIntro() {
 787                 global $wgOut, $wgUser;
 788                 if ( $this->suppressIntro ) {
 789                         return;
 790                 }
 791
 792                 $namespace = $this->mTitle->getNamespace();
 793
 794                 if ( $namespace == NS_MEDIAWIKI ) {
 795                         # Show a warning if editing an interface message
 796                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
 797                 }
 798
 799                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
 800                 # Show log extract when the user is currently blocked
 801                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
 802                         $parts = explode( '/', $this->mTitle->getText(), 2 );
 803                         $username = $parts[0];
 804                         $user = User::newFromName( $username, false /* allow IP users*/ );
 805                         $ip = User::isIP( $username );
 806                         if ( !$user->isLoggedIn() && !$ip ) { # User does not exist
 807                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
 808                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
 809                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
 810                                 LogEventsList::showLogExtract(
 811                                         $wgOut,
 812                                         'block',
 813                                         $user->getUserPage(),
 814                                         '',
 815                                         array(
 816                                                 'lim' => 1,
 817                                                 'showIfEmpty' => false,
 818                                                 'msgKey' => array(
 819                                                         'blocked-notice-logextract',
 820                                                         $user->getName() # Support GENDER in notice
 821                                                 )
 822                                         )
 823                                 );
 824                         }
 825                 }
 826                 # Try to add a custom edit intro, or use the standard one if this is not possible.
 827                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
 828                         if ( $wgUser->isLoggedIn() ) {
 829                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1\n</div>", 'newarticletext' );
 830                         } else {
 831                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1\n</div>", 'newarticletextanon' );
 832                         }
 833                 }
 834                 # Give a notice if the user is editing a deleted/moved page...
 835                 if ( !$this->mTitle->exists() ) {
 836                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
 837                                 '', array( 'lim' => 10,
 838                                            'conds' => array( "log_action != 'revision'" ),
 839                                            'showIfEmpty' => false,
 840                                            'msgKey' => array( 'recreate-moveddeleted-warn') )
 841                         );
 842                 }
 843         }
 844
 845         /**
 846          * Attempt to show a custom editing introduction, if supplied
 847          *
 848          * @return bool
 849          */
 850         protected function showCustomIntro() {
 851                 if ( $this->editintro ) {
 852                         $title = Title::newFromText( $this->editintro );
 853                         if ( $title instanceof Title && $title->exists() && $title->userCanRead() ) {
 854                                 global $wgOut;
 855                                 // Added using template syntax, to take <noinclude>'s into account.
 856                                 $wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
 857                                 return true;
 858                         } else {
 859                                 return false;
 860                         }
 861                 } else {
 862                         return false;
 863                 }
 864         }
 865
 866         /**
 867          * Attempt submission (no UI)
 868          *
 869          * @param $result
 870          * @param $bot bool
 871          *
 872          * @return Status object, possibly with a message, but always with one of the AS_* constants in $status->value,
 873          *
 874          * FIXME: This interface is TERRIBLE, but hard to get rid of due to various error display idiosyncrasies. There are
 875          * also lots of cases where error metadata is set in the object and retrieved later instead of being returned, e.g.
 876          * AS_CONTENT_TOO_BIG and AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some time.
 877          */
 878         function internalAttemptSave( &$result, $bot = false ) {
 879                 global $wgFilterCallback, $wgUser, $wgRequest, $wgParser;
 880                 global $wgMaxArticleSize;
 881
 882                 $status = Status::newGood();
 883
 884                 wfProfileIn( __METHOD__  );
 885                 wfProfileIn( __METHOD__ . '-checks' );
 886
 887                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
 888                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
 889                         $status->fatal( 'hookaborted' );
 890                         $status->value = self::AS_HOOK_ERROR;
 891                         wfProfileOut( __METHOD__ . '-checks' );
 892                         wfProfileOut( __METHOD__  );
 893                         return $status;
 894                 }
 895
 896                 # Check image redirect
 897                 if ( $this->mTitle->getNamespace() == NS_FILE &&
 898                         Title::newFromRedirect( $this->textbox1 ) instanceof Title &&
 899                         !$wgUser->isAllowed( 'upload' ) ) {
 900                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
 901                                 $status->setResult( false, $code );
 902
 903                                 wfProfileOut( __METHOD__ . '-checks' );
 904                                 wfProfileOut( __METHOD__  );
 905
 906                                 return $status;
 907                 }
 908
 909                 # Check for spam
 910                 $match = self::matchSummarySpamRegex( $this->summary );
 911                 if ( $match === false ) {
 912                         $match = self::matchSpamRegex( $this->textbox1 );
 913                 }
 914                 if ( $match !== false ) {
 915                         $result['spam'] = $match;
 916                         $ip = $wgRequest->getIP();
 917                         $pdbk = $this->mTitle->getPrefixedDBkey();
 918                         $match = str_replace( "\n", '', $match );
 919                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
 920                         $status->fatal( 'spamprotectionmatch', $match );
 921                         $status->value = self::AS_SPAM_ERROR;
 922                         wfProfileOut( __METHOD__ . '-checks' );
 923                         wfProfileOut( __METHOD__ );
 924                         return $status;
 925                 }
 926                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
 927                         # Error messages or other handling should be performed by the filter function
 928                         $status->setResult( false, self::AS_FILTERING );
 929                         wfProfileOut( __METHOD__ . '-checks' );
 930                         wfProfileOut( __METHOD__ );
 931                         return $status;
 932                 }
 933                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
 934                         # Error messages etc. could be handled within the hook...
 935                         $status->fatal( 'hookaborted' );
 936                         $status->value = self::AS_HOOK_ERROR;
 937                         wfProfileOut( __METHOD__ . '-checks' );
 938                         wfProfileOut( __METHOD__ );
 939                         return $status;
 940                 } elseif ( $this->hookError != '' ) {
 941                         # ...or the hook could be expecting us to produce an error
 942                         $status->fatal( 'hookaborted' );
 943                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
 944                         wfProfileOut( __METHOD__ . '-checks' );
 945                         wfProfileOut( __METHOD__ );
 946                         return $status;
 947                 }
 948
 949                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 950                         # Check block state against master, thus 'false'.
 951                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
 952                         wfProfileOut( __METHOD__ . '-checks' );
 953                         wfProfileOut( __METHOD__ );
 954                         return $status;
 955                 }
 956
 957                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
 958                 if ( $this->kblength > $wgMaxArticleSize ) {
 959                         // Error will be displayed by showEditForm()
 960                         $this->tooBig = true;
 961                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
 962                         wfProfileOut( __METHOD__ . '-checks' );
 963                         wfProfileOut( __METHOD__ );
 964                         return $status;
 965                 }
 966
 967                 if ( !$wgUser->isAllowed( 'edit' ) ) {
 968                         if ( $wgUser->isAnon() ) {
 969                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
 970                                 wfProfileOut( __METHOD__ . '-checks' );
 971                                 wfProfileOut( __METHOD__ );
 972                                 return $status;
 973                         } else {
 974                                 $status->fatal( 'readonlytext' );
 975                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
 976                                 wfProfileOut( __METHOD__ . '-checks' );
 977                                 wfProfileOut( __METHOD__ );
 978                                 return $status;
 979                         }
 980                 }
 981
 982                 if ( wfReadOnly() ) {
 983                         $status->fatal( 'readonlytext' );
 984                         $status->value = self::AS_READ_ONLY_PAGE;
 985                         wfProfileOut( __METHOD__ . '-checks' );
 986                         wfProfileOut( __METHOD__ );
 987                         return $status;
 988                 }
 989                 if ( $wgUser->pingLimiter() ) {
 990                         $status->fatal( 'actionthrottledtext' );
 991                         $status->value = self::AS_RATE_LIMITED;
 992                         wfProfileOut( __METHOD__ . '-checks' );
 993                         wfProfileOut( __METHOD__ );
 994                         return $status;
 995                 }
 996
 997                 # If the article has been deleted while editing, don't save it without
 998                 # confirmation
 999                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1000                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1001                         wfProfileOut( __METHOD__ . '-checks' );
1002                         wfProfileOut( __METHOD__ );
1003                         return $status;
1004                 }
1005
1006                 wfProfileOut( __METHOD__ . '-checks' );
1007
1008                 # If article is new, insert it.
1009                 $aid = $this->mTitle->getArticleID( Title::GAID_FOR_UPDATE );
1010                 $new = ( $aid == 0 );
1011
1012                 if ( $new ) {
1013                         // Late check for create permission, just in case *PARANOIA*
1014                         if ( !$this->mTitle->userCan( 'create' ) ) {
1015                                 $status->fatal( 'nocreatetext' );
1016                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1017                                 wfDebug( __METHOD__ . ": no create permission\n" );
1018                                 wfProfileOut( __METHOD__ );
1019                                 return $status;
1020                         }
1021
1022                         # Don't save a new article if it's blank.
1023                         if ( $this->textbox1 == '' ) {
1024                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1025                                 wfProfileOut( __METHOD__ );
1026                                 return $status;
1027                         }
1028
1029                         // Run post-section-merge edit filter
1030                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
1031                                 # Error messages etc. could be handled within the hook...
1032                                 $status->fatal( 'hookaborted' );
1033                                 $status->value = self::AS_HOOK_ERROR;
1034                                 wfProfileOut( __METHOD__ );
1035                                 return $status;
1036                         } elseif ( $this->hookError != '' ) {
1037                                 # ...or the hook could be expecting us to produce an error
1038                                 $status->fatal( 'hookaborted' );
1039                                 $status->value = self::AS_HOOK_ERROR_EXPECTED;
1040                                 wfProfileOut( __METHOD__ );
1041                                 return $status;
1042                         }
1043
1044                         # Handle the user preference to force summaries here. Check if it's not a redirect.
1045                         if ( !$this->allowBlankSummary && !Title::newFromRedirect( $this->textbox1 ) ) {
1046                                 if ( md5( $this->summary ) == $this->autoSumm ) {
1047                                         $this->missingSummary = true;
1048                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1049                                         $status->value = self::AS_SUMMARY_NEEDED;
1050                                         wfProfileOut( __METHOD__ );
1051                                         return $status;
1052                                 }
1053                         }
1054
1055                         $text = $this->textbox1;
1056                         if ( $this->section == 'new' && $this->summary != '' ) {
1057                                 $text = wfMsgForContent( 'newsectionheaderdefaultlevel', $this->summary ) . "\n\n" . $text;
1058                         }
1059
1060                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1061
1062                 } else {
1063
1064                         # Article exists. Check for edit conflict.
1065
1066                         $this->mArticle->clear(); # Force reload of dates, etc.
1067
1068                         wfDebug( "timestamp: {$this->mArticle->getTimestamp()}, edittime: {$this->edittime}\n" );
1069
1070                         if ( $this->mArticle->getTimestamp() != $this->edittime ) {
1071                                 $this->isConflict = true;
1072                                 if ( $this->section == 'new' ) {
1073                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1074                                                 $this->mArticle->getComment() == $this->summary ) {
1075                                                 // Probably a duplicate submission of a new comment.
1076                                                 // This can happen when squid resends a request after
1077                                                 // a timeout but the first one actually went through.
1078                                                 wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
1079                                         } else {
1080                                                 // New comment; suppress conflict.
1081                                                 $this->isConflict = false;
1082                                                 wfDebug( __METHOD__ .": conflict suppressed; new section\n" );
1083                                         }
1084                                 } elseif ( $this->section == '' && $this->userWasLastToEdit( $wgUser->getId(), $this->edittime ) ) {
1085                                         # Suppress edit conflict with self, except for section edits where merging is required.
1086                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1087                                         $this->isConflict = false;
1088                                 }
1089                         }
1090
1091                         if ( $this->isConflict ) {
1092                                 wfDebug( __METHOD__ . ": conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
1093                                         $this->mArticle->getTimestamp() . "')\n" );
1094                                 $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime );
1095                         } else {
1096                                 wfDebug( __METHOD__ . ": getting section '$this->section'\n" );
1097                                 $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary );
1098                         }
1099                         if ( is_null( $text ) ) {
1100                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1101                                 $this->isConflict = true;
1102                                 $text = $this->textbox1; // do not try to merge here!
1103                         } elseif ( $this->isConflict ) {
1104                                 # Attempt merge
1105                                 if ( $this->mergeChangesInto( $text ) ) {
1106                                         // Successful merge! Maybe we should tell the user the good news?
1107                                         $this->isConflict = false;
1108                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1109                                 } else {
1110                                         $this->section = '';
1111                                         $this->textbox1 = $text;
1112                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1113                                 }
1114                         }
1115
1116                         if ( $this->isConflict ) {
1117                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1118                                 wfProfileOut( __METHOD__ );
1119                                 return $status;
1120                         }
1121
1122                         // Run post-section-merge edit filter
1123                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$this->hookError, $this->summary ) ) ) {
1124                                 # Error messages etc. could be handled within the hook...
1125                                 $status->fatal( 'hookaborted' );
1126                                 $status->value = self::AS_HOOK_ERROR;
1127                                 wfProfileOut( __METHOD__ );
1128                                 return $status;
1129                         } elseif ( $this->hookError != '' ) {
1130                                 # ...or the hook could be expecting us to produce an error
1131                                 $status->fatal( 'hookaborted' );
1132                                 $status->value = self::AS_HOOK_ERROR_EXPECTED;
1133                                 wfProfileOut( __METHOD__ );
1134                                 return $status;
1135                         }
1136
1137                         # Handle the user preference to force summaries here, but not for null edits
1138                         if ( $this->section != 'new' && !$this->allowBlankSummary
1139                                 && 0 != strcmp( $this->mArticle->getContent(), $text )
1140                                 && !Title::newFromRedirect( $text ) ) # check if it's not a redirect
1141                         {
1142                                 if ( md5( $this->summary ) == $this->autoSumm ) {
1143                                         $this->missingSummary = true;
1144                                         $status->fatal( 'missingsummary' );
1145                                         $status->value = self::AS_SUMMARY_NEEDED;
1146                                         wfProfileOut( __METHOD__ );
1147                                         return $status;
1148                                 }
1149                         }
1150
1151                         # And a similar thing for new sections
1152                         if ( $this->section == 'new' && !$this->allowBlankSummary ) {
1153                                 if ( trim( $this->summary ) == '' ) {
1154                                         $this->missingSummary = true;
1155                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1156                                         $status->value = self::AS_SUMMARY_NEEDED;
1157                                         wfProfileOut( __METHOD__ );
1158                                         return $status;
1159                                 }
1160                         }
1161
1162                         # All's well
1163                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1164                         $sectionanchor = '';
1165                         if ( $this->section == 'new' ) {
1166                                 if ( $this->textbox1 == '' ) {
1167                                         $this->missingComment = true;
1168                                         $status->fatal( 'missingcommenttext' );
1169                                         $status->value = self::AS_TEXTBOX_EMPTY;
1170                                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1171                                         wfProfileOut( __METHOD__ );
1172                                         return $status;
1173                                 }
1174                                 if ( $this->summary != '' ) {
1175                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1176                                         # This is a new section, so create a link to the new section
1177                                         # in the revision summary.
1178                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1179                                         $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1180                                 }
1181                         } elseif ( $this->section != '' ) {
1182                                 # Try to get a section anchor from the section source, redirect to edited section if header found
1183                                 # XXX: might be better to integrate this into Article::replaceSection
1184                                 # for duplicate heading checking and maybe parsing
1185                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1186                                 # we can't deal with anchors, includes, html etc in the header for now,
1187                                 # headline would need to be parsed to improve this
1188                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1189                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1190                                 }
1191                         }
1192                         $result['sectionanchor'] = $sectionanchor;
1193                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1194
1195                         // Save errors may fall down to the edit form, but we've now
1196                         // merged the section into full text. Clear the section field
1197                         // so that later submission of conflict forms won't try to
1198                         // replace that into a duplicated mess.
1199                         $this->textbox1 = $text;
1200                         $this->section = '';
1201
1202                         $status->value = self::AS_SUCCESS_UPDATE;
1203                 }
1204
1205                 // Check for length errors again now that the section is merged in
1206                 $this->kblength = (int)( strlen( $text ) / 1024 );
1207                 if ( $this->kblength > $wgMaxArticleSize ) {
1208                         $this->tooBig = true;
1209                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1210                         wfProfileOut( __METHOD__ );
1211                         return $status;
1212                 }
1213
1214                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1215                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1216                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1217                         ( $bot ? EDIT_FORCE_BOT : 0 );
1218
1219                 $doEditStatus = $this->mArticle->doEdit( $text, $this->summary, $flags );
1220
1221                 if ( $doEditStatus->isOK() ) {
1222                         $result['redirect'] = Title::newFromRedirect( $text ) !== null;
1223                         $this->commitWatch();
1224                         wfProfileOut( __METHOD__ );
1225                         return $status;
1226                 } else {
1227                         $this->isConflict = true;
1228                         $doEditStatus->value = self::AS_END; // Destroys data doEdit() put in $status->value but who cares
1229                         wfProfileOut( __METHOD__ );
1230                         return $doEditStatus;
1231                 }
1232         }
1233
1234         /**
1235          * Commit the change of watch status
1236          */
1237         protected function commitWatch() {
1238                 global $wgUser;
1239                 if ( $this->watchthis xor $this->mTitle->userIsWatching() ) {
1240                         $dbw = wfGetDB( DB_MASTER );
1241                         $dbw->begin();
1242                         if ( $this->watchthis ) {
1243                                 WatchAction::doWatch( $this->mTitle, $wgUser );
1244                         } else {
1245                                 WatchAction::doUnwatch( $this->mTitle, $wgUser );
1246                         }
1247                         $dbw->commit();
1248                 }
1249         }
1250
1251         /**
1252          * Check if no edits were made by other users since
1253          * the time a user started editing the page. Limit to
1254          * 50 revisions for the sake of performance.
1255          *
1256          * @param $id int
1257          * @param $edittime string
1258          *
1259          * @return bool
1260          */
1261         protected function userWasLastToEdit( $id, $edittime ) {
1262                 if( !$id ) return false;
1263                 $dbw = wfGetDB( DB_MASTER );
1264                 $res = $dbw->select( 'revision',
1265                         'rev_user',
1266                         array(
1267                                 'rev_page' => $this->mArticle->getId(),
1268                                 'rev_timestamp > '.$dbw->addQuotes( $dbw->timestamp($edittime) )
1269                         ),
1270                         __METHOD__,
1271                         array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
1272                 foreach ( $res as $row ) {
1273                         if( $row->rev_user != $id ) {
1274                                 return false;
1275                         }
1276                 }
1277                 return true;
1278         }
1279
1280         /**
1281          * Check given input text against $wgSpamRegex, and return the text of the first match.
1282          *
1283          * @param $text string
1284          *
1285          * @return string|false matching string or false
1286          */
1287         public static function matchSpamRegex( $text ) {
1288                 global $wgSpamRegex;
1289                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1290                 $regexes = (array)$wgSpamRegex;
1291                 return self::matchSpamRegexInternal( $text, $regexes );
1292         }
1293
1294         /**
1295          * Check given input text against $wgSpamRegex, and return the text of the first match.
1296          *
1297          * @parma $text string
1298          *
1299          * @return string|false  matching string or false
1300          */
1301         public static function matchSummarySpamRegex( $text ) {
1302                 global $wgSummarySpamRegex;
1303                 $regexes = (array)$wgSummarySpamRegex;
1304                 return self::matchSpamRegexInternal( $text, $regexes );
1305         }
1306
1307         /**
1308          * @param $text string
1309          * @param $regexes array
1310          * @return bool|string
1311          */
1312         protected static function matchSpamRegexInternal( $text, $regexes ) {
1313                 foreach( $regexes as $regex ) {
1314                         $matches = array();
1315                         if( preg_match( $regex, $text, $matches ) ) {
1316                                 return $matches[0];
1317                         }
1318                 }
1319                 return false;
1320         }
1321
1322         /**
1323          * Initialise form fields in the object
1324          * Called on the first invocation, e.g. when a user clicks an edit link
1325          * @return bool -- if the requested section is valid
1326          */
1327         function initialiseForm() {
1328                 global $wgUser;
1329                 $this->edittime = $this->mArticle->getTimestamp();
1330                 $this->textbox1 = $this->getContent( false );
1331                 // activate checkboxes if user wants them to be always active
1332                 # Sort out the "watch" checkbox
1333                 if ( $wgUser->getOption( 'watchdefault' ) ) {
1334                         # Watch all edits
1335                         $this->watchthis = true;
1336                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1337                         # Watch creations
1338                         $this->watchthis = true;
1339                 } elseif ( $this->mTitle->userIsWatching() ) {
1340                         # Already watched
1341                         $this->watchthis = true;
1342                 }
1343                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
1344                         $this->minoredit = true;
1345                 }
1346                 if ( $this->textbox1 === false ) {
1347                         return false;
1348                 }
1349                 wfProxyCheck();
1350                 return true;
1351         }
1352
1353         function setHeaders() {
1354                 global $wgOut;
1355                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1356                 if ( $this->formtype == 'preview' ) {
1357                         $wgOut->setPageTitleActionText( wfMsg( 'preview' ) );
1358                 }
1359                 if ( $this->isConflict ) {
1360                         $wgOut->setPageTitle( wfMsg( 'editconflict', $this->getContextTitle()->getPrefixedText() ) );
1361                 } elseif ( $this->section != '' ) {
1362                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1363                         $wgOut->setPageTitle( wfMsg( $msg, $this->getContextTitle()->getPrefixedText() ) );
1364                 } else {
1365                         # Use the title defined by DISPLAYTITLE magic word when present
1366                         if ( isset( $this->mParserOutput )
1367                          && ( $dt = $this->mParserOutput->getDisplayTitle() ) !== false ) {
1368                                 $title = $dt;
1369                         } else {
1370                                 $title = $this->getContextTitle()->getPrefixedText();
1371                         }
1372                         $wgOut->setPageTitle( wfMsg( 'editing', $title ) );
1373                 }
1374         }
1375
1376         /**
1377          * Send the edit form and related headers to $wgOut
1378          * @param $formCallback Callback that takes an OutputPage parameter; will be called
1379          *     during form output near the top, for captchas and the like.
1380          */
1381         function showEditForm( $formCallback = null ) {
1382                 global $wgOut, $wgUser;
1383
1384                 wfProfileIn( __METHOD__ );
1385
1386                 #need to parse the preview early so that we know which templates are used,
1387                 #otherwise users with "show preview after edit box" will get a blank list
1388                 #we parse this near the beginning so that setHeaders can do the title
1389                 #setting work instead of leaving it in getPreviewText
1390                 $previewOutput = '';
1391                 if ( $this->formtype == 'preview' ) {
1392                         $previewOutput = $this->getPreviewText();
1393                 }
1394
1395                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) );
1396
1397                 $this->setHeaders();
1398
1399                 # Enabled article-related sidebar, toplinks, etc.
1400                 $wgOut->setArticleRelated( true );
1401
1402                 if ( $this->showHeader() === false ) {
1403                         wfProfileOut( __METHOD__ );
1404                         return;
1405                 }
1406
1407                 $action = htmlspecialchars( $this->getActionURL( $this->getContextTitle() ) );
1408
1409                 if ( $wgUser->getOption( 'showtoolbar' ) and !$this->isCssJsSubpage ) {
1410                         # prepare toolbar for edit buttons
1411                         $toolbar = EditPage::getEditToolbar();
1412                 } else {
1413                         $toolbar = '';
1414                 }
1415
1416
1417                 $wgOut->addHTML( $this->editFormPageTop );
1418
1419                 if ( $wgUser->getOption( 'previewontop' ) ) {
1420                         $this->displayPreviewArea( $previewOutput, true );
1421                 }
1422
1423                 $wgOut->addHTML( $this->editFormTextTop );
1424
1425                 $templates = $this->getTemplates();
1426                 $formattedtemplates = Linker::formatTemplates( $templates, $this->preview, $this->section != '');
1427
1428                 $hiddencats = $this->mArticle->getHiddenCategories();
1429                 $formattedhiddencats = Linker::formatHiddenCategories( $hiddencats );
1430
1431                 if ( $this->wasDeletedSinceLastEdit() && 'save' != $this->formtype ) {
1432                         $wgOut->wrapWikiMsg(
1433                                 "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
1434                                 'deletedwhileediting' );
1435                 } elseif ( $this->wasDeletedSinceLastEdit() ) {
1436                         // Hide the toolbar and edit area, user can click preview to get it back
1437                         // Add an confirmation checkbox and explanation.
1438                         $toolbar = '';
1439                         // @todo move this to a cleaner conditional instead of blanking a variable
1440                 }
1441                 $wgOut->addHTML( <<<HTML
1442 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1443 HTML
1444 );
1445
1446                 if ( is_callable( $formCallback ) ) {
1447                         call_user_func_array( $formCallback, array( &$wgOut ) );
1448                 }
1449
1450                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1451
1452                 // Put these up at the top to ensure they aren't lost on early form submission
1453                 $this->showFormBeforeText();
1454
1455                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
1456                         $username = $this->lastDelete->user_name;
1457                         $comment = $this->lastDelete->log_comment;
1458
1459                         // It is better to not parse the comment at all than to have templates expanded in the middle
1460                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
1461                         $key = $comment === ''
1462                                 ? 'confirmrecreate-noreason'
1463                                 : 'confirmrecreate';
1464                         $wgOut->addHTML(
1465                                 '<div class="mw-confirm-recreate">' .
1466                                 wfMsgExt( $key, 'parseinline', $username, "<nowiki>$comment</nowiki>" ) .
1467                                 Xml::checkLabel( wfMsg( 'recreate' ), 'wpRecreate', 'wpRecreate', false,
1468                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
1469                                 ) .
1470                                 '</div>'
1471                         );
1472                 }
1473
1474                 # If a blank edit summary was previously provided, and the appropriate
1475                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1476                 # user being bounced back more than once in the event that a summary
1477                 # is not required.
1478                 #####
1479                 # For a bit more sophisticated detection of blank summaries, hash the
1480                 # automatic one and pass that in the hidden field wpAutoSummary.
1481                 if ( $this->missingSummary ||
1482                         ( $this->section == 'new' && $this->nosummary ) )
1483                                 $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
1484                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1485                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
1486
1487                 $wgOut->addHTML( Html::hidden( 'oldid', $this->mArticle->getOldID() ) );
1488
1489                 if ( $this->section == 'new' ) {
1490                         $this->showSummaryInput( true, $this->summary );
1491                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
1492                 }
1493
1494                 $wgOut->addHTML( $this->editFormTextBeforeContent );
1495
1496                 $wgOut->addHTML( $toolbar );
1497
1498                 if ( $this->isConflict ) {
1499                         // In an edit conflict bypass the overrideable content form method
1500                         // and fallback to the raw wpTextbox1 since editconflicts can't be
1501                         // resolved between page source edits and custom ui edits using the
1502                         // custom edit ui.
1503                         $this->showTextbox1( null, $this->getContent() );
1504                 } else {
1505                         $this->showContentForm();
1506                 }
1507
1508                 $wgOut->addHTML( $this->editFormTextAfterContent );
1509
1510                 $wgOut->addWikiText( $this->getCopywarn() );
1511                 if ( isset($this->editFormTextAfterWarn) && $this->editFormTextAfterWarn !== '' )
1512                         $wgOut->addHTML( $this->editFormTextAfterWarn );
1513
1514                 $this->showStandardInputs();
1515
1516                 $this->showFormAfterText();
1517
1518                 $this->showTosSummary();
1519                 $this->showEditTools();
1520
1521                 $wgOut->addHTML( <<<HTML
1522 {$this->editFormTextAfterTools}
1523 <div class='templatesUsed'>
1524 {$formattedtemplates}
1525 </div>
1526 <div class='hiddencats'>
1527 {$formattedhiddencats}
1528 </div>
1529 HTML
1530 );
1531
1532                 if ( $this->isConflict )
1533                         $this->showConflict();
1534
1535                 $wgOut->addHTML( $this->editFormTextBottom );
1536                 $wgOut->addHTML( "</form>\n" );
1537                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1538                         $this->displayPreviewArea( $previewOutput, false );
1539                 }
1540
1541                 wfProfileOut( __METHOD__ );
1542         }
1543
1544         protected function showHeader() {
1545                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
1546                 if ( $this->isConflict ) {
1547                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
1548                         $this->edittime = $this->mArticle->getTimestamp();
1549                 } else {
1550                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
1551                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
1552                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
1553                                 // Someone is welcome to try refactoring though
1554                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
1555                                 return false;
1556                         }
1557
1558                         if ( $this->section != '' && $this->section != 'new' ) {
1559                                 $matches = array();
1560                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
1561                                         preg_match( "/^(=+)(.+)\\1/mi", $this->textbox1, $matches );
1562                                         if ( !empty( $matches[2] ) ) {
1563                                                 global $wgParser;
1564                                                 $this->summary = "/* " .
1565                                                         $wgParser->stripSectionName(trim($matches[2])) .
1566                                                         " */ ";
1567                                         }
1568                                 }
1569                         }
1570
1571                         if ( $this->missingComment ) {
1572                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
1573                         }
1574
1575                         if ( $this->missingSummary && $this->section != 'new' ) {
1576                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
1577                         }
1578
1579                         if ( $this->missingSummary && $this->section == 'new' ) {
1580                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
1581                         }
1582
1583                         if ( $this->hookError !== '' ) {
1584                                 $wgOut->addWikiText( $this->hookError );
1585                         }
1586
1587                         if ( !$this->checkUnicodeCompliantBrowser() ) {
1588                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
1589                         }
1590
1591                         if ( isset( $this->mArticle ) && isset( $this->mArticle->mRevision ) ) {
1592                         // Let sysop know that this will make private content public if saved
1593
1594                                 if ( !$this->mArticle->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1595                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
1596                                 } elseif ( $this->mArticle->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1597                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
1598                                 }
1599
1600                                 if ( !$this->mArticle->mRevision->isCurrent() ) {
1601                                         $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
1602                                         $wgOut->addWikiMsg( 'editingold' );
1603                                 }
1604                         }
1605                 }
1606
1607                 if ( wfReadOnly() ) {
1608                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
1609                 } elseif ( $wgUser->isAnon() ) {
1610                         if ( $this->formtype != 'preview' ) {
1611                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
1612                         } else {
1613                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
1614                         }
1615                 } else {
1616                         if ( $this->isCssJsSubpage ) {
1617                                 # Check the skin exists
1618                                 if ( $this->isWrongCaseCssJsPage ) {
1619                                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
1620                                 }
1621                                 if ( $this->formtype !== 'preview' ) {
1622                                         if ( $this->isCssSubpage )
1623                                                 $wgOut->wrapWikiMsg( "<div id='mw-usercssyoucanpreview'>\n$1\n</div>", array( 'usercssyoucanpreview' ) );
1624                                         if ( $this->isJsSubpage )
1625                                                 $wgOut->wrapWikiMsg( "<div id='mw-userjsyoucanpreview'>\n$1\n</div>", array( 'userjsyoucanpreview' ) );
1626                                 }
1627                         }
1628                 }
1629
1630                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
1631                         # Is the title semi-protected?
1632                         if ( $this->mTitle->isSemiProtected() ) {
1633                                 $noticeMsg = 'semiprotectedpagewarning';
1634                         } else {
1635                                 # Then it must be protected based on static groups (regular)
1636                                 $noticeMsg = 'protectedpagewarning';
1637                         }
1638                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
1639                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
1640                 }
1641                 if ( $this->mTitle->isCascadeProtected() ) {
1642                         # Is this page under cascading protection from some source pages?
1643                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
1644                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
1645                         $cascadeSourcesCount = count( $cascadeSources );
1646                         if ( $cascadeSourcesCount > 0 ) {
1647                                 # Explain, and list the titles responsible
1648                                 foreach( $cascadeSources as $page ) {
1649                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
1650                                 }
1651                         }
1652                         $notice .= '</div>';
1653                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
1654                 }
1655                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
1656                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
1657                                 array(  'lim' => 1,
1658                                         'showIfEmpty' => false,
1659                                         'msgKey' => array( 'titleprotectedwarning' ),
1660                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
1661                 }
1662
1663                 if ( $this->kblength === false ) {
1664                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1665                 }
1666
1667                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
1668                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
1669                                 array( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) ) );
1670                 } else {
1671                         if( !wfMessage('longpage-hint')->isDisabled() ) {
1672                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
1673                                         array( 'longpage-hint', $wgLang->formatSize( strlen( $this->textbox1 ) ), strlen( $this->textbox1 ) )
1674                                 );
1675                         }
1676                 }
1677         }
1678
1679         /**
1680          * Standard summary input and label (wgSummary), abstracted so EditPage
1681          * subclasses may reorganize the form.
1682          * Note that you do not need to worry about the label's for=, it will be
1683          * inferred by the id given to the input. You can remove them both by
1684          * passing array( 'id' => false ) to $userInputAttrs.
1685          *
1686          * @param $summary string The value of the summary input
1687          * @param $labelText string The html to place inside the label
1688          * @param $inputAttrs array of attrs to use on the input
1689          * @param $spanLabelAttrs array of attrs to use on the span inside the label
1690          *
1691          * @return array An array in the format array( $label, $input )
1692          */
1693         function getSummaryInput($summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null) {
1694                 //Note: the maxlength is overriden in JS to 250 and to make it use UTF-8 bytes, not characters.
1695                 $inputAttrs = ( is_array($inputAttrs) ? $inputAttrs : array() ) + array(
1696                         'id' => 'wpSummary',
1697                         'maxlength' => '200',
1698                         'tabindex' => '1',
1699                         'size' => 60,
1700                         'spellcheck' => 'true',
1701                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
1702
1703                 $spanLabelAttrs = ( is_array($spanLabelAttrs) ? $spanLabelAttrs : array() ) + array(
1704                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
1705                         'id' => "wpSummaryLabel"
1706                 );
1707
1708                 $label = null;
1709                 if ( $labelText ) {
1710                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
1711                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
1712                 }
1713
1714                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
1715
1716                 return array( $label, $input );
1717         }
1718
1719         /**
1720          * @param $isSubjectPreview Boolean: true if this is the section subject/title
1721          *                          up top, or false if this is the comment summary
1722          *                          down below the textarea
1723          * @param $summary String: The text of the summary to display
1724          * @return String
1725          */
1726         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
1727                 global $wgOut, $wgContLang;
1728                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
1729                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
1730                 if ( $isSubjectPreview ) {
1731                         if ( $this->nosummary ) {
1732                                 return;
1733                         }
1734                 } else {
1735                         if ( !$this->mShowSummaryField ) {
1736                                 return;
1737                         }
1738                 }
1739                 $summary = $wgContLang->recodeForEdit( $summary );
1740                 $labelText = wfMsgExt( $isSubjectPreview ? 'subject' : 'summary', 'parseinline' );
1741                 list($label, $input) = $this->getSummaryInput($summary, $labelText, array( 'class' => $summaryClass ), array());
1742                 $wgOut->addHTML("{$label} {$input}");
1743         }
1744
1745         /**
1746          * @param $isSubjectPreview Boolean: true if this is the section subject/title
1747          *                          up top, or false if this is the comment summary
1748          *                          down below the textarea
1749          * @param $summary String: the text of the summary to display
1750          * @return String
1751          */
1752         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
1753                 if ( !$summary || ( !$this->preview && !$this->diff ) )
1754                         return "";
1755
1756                 global $wgParser;
1757
1758                 if ( $isSubjectPreview )
1759                         $summary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $summary ) );
1760
1761                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
1762
1763                 $summary = wfMsgExt( $message, 'parseinline' ) . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
1764                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
1765         }
1766
1767         protected function showFormBeforeText() {
1768                 global $wgOut;
1769                 $section = htmlspecialchars( $this->section );
1770                 $wgOut->addHTML( <<<HTML
1771 <input type='hidden' value="{$section}" name="wpSection" />
1772 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
1773 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
1774 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
1775
1776 HTML
1777                 );
1778                 if ( !$this->checkUnicodeCompliantBrowser() )
1779                         $wgOut->addHTML(Html::hidden( 'safemode', '1' ));
1780         }
1781
1782         protected function showFormAfterText() {
1783                 global $wgOut, $wgUser;
1784                 /**
1785                  * To make it harder for someone to slip a user a page
1786                  * which submits an edit form to the wiki without their
1787                  * knowledge, a random token is associated with the login
1788                  * session. If it's not passed back with the submission,
1789                  * we won't save the page, or render user JavaScript and
1790                  * CSS previews.
1791                  *
1792                  * For anon editors, who may not have a session, we just
1793                  * include the constant suffix to prevent editing from
1794                  * broken text-mangling proxies.
1795                  */
1796                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->editToken() ) . "\n" );
1797         }
1798
1799         /**
1800          * Subpage overridable method for printing the form for page content editing
1801          * By default this simply outputs wpTextbox1
1802          * Subclasses can override this to provide a custom UI for editing;
1803          * be it a form, or simply wpTextbox1 with a modified content that will be
1804          * reverse modified when extracted from the post data.
1805          * Note that this is basically the inverse for importContentFormData
1806          */
1807         protected function showContentForm() {
1808                 $this->showTextbox1();
1809         }
1810
1811         /**
1812          * Method to output wpTextbox1
1813          * The $textoverride method can be used by subclasses overriding showContentForm
1814          * to pass back to this method.
1815          *
1816          * @param $customAttribs An array of html attributes to use in the textarea
1817          * @param $textoverride String: optional text to override $this->textarea1 with
1818          */
1819         protected function showTextbox1($customAttribs = null, $textoverride = null) {
1820                 $classes = array(); // Textarea CSS
1821                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
1822                         # Is the title semi-protected?
1823                         if ( $this->mTitle->isSemiProtected() ) {
1824                                 $classes[] = 'mw-textarea-sprotected';
1825                         } else {
1826                                 # Then it must be protected based on static groups (regular)
1827                                 $classes[] = 'mw-textarea-protected';
1828                         }
1829                         # Is the title cascade-protected?
1830                         if ( $this->mTitle->isCascadeProtected() ) {
1831                                 $classes[] = 'mw-textarea-cprotected';
1832                         }
1833                 }
1834                 $attribs = array( 'tabindex' => 1 );
1835                 if ( is_array($customAttribs) )
1836                         $attribs += $customAttribs;
1837
1838                 if ( $this->wasDeletedSinceLastEdit() )
1839                         $attribs['type'] = 'hidden';
1840                 if ( !empty( $classes ) ) {
1841                         if ( isset($attribs['class']) )
1842                                 $classes[] = $attribs['class'];
1843                         $attribs['class'] = implode( ' ', $classes );
1844                 }
1845
1846                 $this->showTextbox( isset($textoverride) ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
1847         }
1848
1849         protected function showTextbox2() {
1850                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
1851         }
1852
1853         protected function showTextbox( $content, $name, $customAttribs = array() ) {
1854                 global $wgOut, $wgUser;
1855
1856                 $wikitext = $this->safeUnicodeOutput( $content );
1857                 if ( strval($wikitext) !== '' ) {
1858                         // Ensure there's a newline at the end, otherwise adding lines
1859                         // is awkward.
1860                         // But don't add a newline if the ext is empty, or Firefox in XHTML
1861                         // mode will show an extra newline. A bit annoying.
1862                         $wikitext .= "\n";
1863                 }
1864
1865                 $attribs = $customAttribs + array(
1866                         'accesskey' => ',',
1867                         'id'   => $name,
1868                         'cols' => $wgUser->getIntOption( 'cols' ),
1869                         'rows' => $wgUser->getIntOption( 'rows' ),
1870                         'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
1871                 );
1872
1873                 $pageLang = $this->mTitle->getPageLanguage();
1874                 $attribs['lang'] = $pageLang->getCode();
1875                 $attribs['dir'] = $pageLang->getDir();
1876
1877                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
1878         }
1879
1880         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
1881                 global $wgOut;
1882                 $classes = array();
1883                 if ( $isOnTop )
1884                         $classes[] = 'ontop';
1885
1886                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
1887
1888                 if ( $this->formtype != 'preview' )
1889                         $attribs['style'] = 'display: none;';
1890
1891                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
1892
1893                 if ( $this->formtype == 'preview' ) {
1894                         $this->showPreview( $previewOutput );
1895                 }
1896
1897                 $wgOut->addHTML( '</div>' );
1898
1899                 if ( $this->formtype == 'diff') {
1900                         $this->showDiff();
1901                 }
1902         }
1903
1904         /**
1905          * Append preview output to $wgOut.
1906          * Includes category rendering if this is a category page.
1907          *
1908          * @param $text String: the HTML to be output for the preview.
1909          */
1910         protected function showPreview( $text ) {
1911                 global $wgOut;
1912                 if ( $this->mTitle->getNamespace() == NS_CATEGORY) {
1913                         $this->mArticle->openShowCategory();
1914                 }
1915                 # This hook seems slightly odd here, but makes things more
1916                 # consistent for extensions.
1917                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
1918                 $wgOut->addHTML( $text );
1919                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
1920                         $this->mArticle->closeShowCategory();
1921                 }
1922         }
1923
1924         /**
1925          * Give a chance for site and per-namespace customizations of
1926          * terms of service summary link that might exist separately
1927          * from the copyright notice.
1928          *
1929          * This will display between the save button and the edit tools,
1930          * so should remain short!
1931          */
1932         protected function showTosSummary() {
1933                 $msg = 'editpage-tos-summary';
1934                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
1935                 if( !wfMessage( $msg )->isDisabled() ) {
1936                         global $wgOut;
1937                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
1938                         $wgOut->addWikiMsg( $msg );
1939                         $wgOut->addHTML( '</div>' );
1940                 }
1941         }
1942
1943         protected function showEditTools() {
1944                 global $wgOut;
1945                 $wgOut->addHTML( '<div class="mw-editTools">' .
1946                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
1947                         '</div>' );
1948         }
1949
1950         protected function getCopywarn() {
1951                 global $wgRightsText;
1952                 if ( $wgRightsText ) {
1953                         $copywarnMsg = array( 'copyrightwarning',
1954                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
1955                                 $wgRightsText );
1956                 } else {
1957                         $copywarnMsg = array( 'copyrightwarning2',
1958                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
1959                 }
1960                 // Allow for site and per-namespace customization of contribution/copyright notice.
1961                 wfRunHooks( 'EditPageCopyrightWarning', array( $this->mTitle, &$copywarnMsg ) );
1962
1963                 return "<div id=\"editpage-copywarn\">\n" .
1964                         call_user_func_array("wfMsgNoTrans", $copywarnMsg) . "\n</div>";
1965         }
1966
1967         protected function showStandardInputs( &$tabindex = 2 ) {
1968                 global $wgOut;
1969                 $wgOut->addHTML( "<div class='editOptions'>\n" );
1970
1971                 if ( $this->section != 'new' ) {
1972                         $this->showSummaryInput( false, $this->summary );
1973                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
1974                 }
1975
1976                 $checkboxes = $this->getCheckboxes( $tabindex,
1977                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
1978                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
1979                 $wgOut->addHTML( "<div class='editButtons'>\n" );
1980                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
1981
1982                 $cancel = $this->getCancelLink();
1983                 if ( $cancel !== '' ) {
1984                         $cancel .= wfMsgExt( 'pipe-separator' , 'escapenoentities' );
1985                 }
1986                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ) );
1987                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
1988                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
1989                         htmlspecialchars( wfMsg( 'newwindow' ) );
1990                 $wgOut->addHTML( "      <span class='editHelp'>{$cancel}{$edithelp}</span>\n" );
1991                 $wgOut->addHTML( "</div><!-- editButtons -->\n</div><!-- editOptions -->\n" );
1992         }
1993
1994         /**
1995          * Show an edit conflict. textbox1 is already shown in showEditForm().
1996          * If you want to use another entry point to this function, be careful.
1997          */
1998         protected function showConflict() {
1999                 global $wgOut;
2000                 $this->textbox2 = $this->textbox1;
2001                 $this->textbox1 = $this->getContent();
2002                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
2003                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2004
2005                         $de = new DifferenceEngine( $this->mTitle );
2006                         $de->setText( $this->textbox2, $this->textbox1 );
2007                         $de->showDiff( wfMsgExt( 'yourtext', 'parseinline' ), wfMsg( 'storedversion' ) );
2008
2009                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2010                         $this->showTextbox2();
2011                 }
2012         }
2013
2014         protected function getLastDelete() {
2015                 $dbr = wfGetDB( DB_SLAVE );
2016                 $data = $dbr->selectRow(
2017                         array( 'logging', 'user' ),
2018                         array( 'log_type',
2019                                    'log_action',
2020                                    'log_timestamp',
2021                                    'log_user',
2022                                    'log_namespace',
2023                                    'log_title',
2024                                    'log_comment',
2025                                    'log_params',
2026                                    'log_deleted',
2027                                    'user_name' ),
2028                         array( 'log_namespace' => $this->mTitle->getNamespace(),
2029                                    'log_title' => $this->mTitle->getDBkey(),
2030                                    'log_type' => 'delete',
2031                                    'log_action' => 'delete',
2032                                    'user_id=log_user' ),
2033                         __METHOD__,
2034                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
2035                 );
2036                 // Quick paranoid permission checks...
2037                 if( is_object( $data ) ) {
2038                         if( $data->log_deleted & LogPage::DELETED_USER )
2039                                 $data->user_name = wfMsgHtml( 'rev-deleted-user' );
2040                         if( $data->log_deleted & LogPage::DELETED_COMMENT )
2041                                 $data->log_comment = wfMsgHtml( 'rev-deleted-comment' );
2042                 }
2043                 return $data;
2044         }
2045
2046         /**
2047          * Get the rendered text for previewing.
2048          * @return string
2049          */
2050         function getPreviewText() {
2051                 global $wgOut, $wgUser, $wgParser;
2052
2053                 wfProfileIn( __METHOD__ );
2054
2055                 if ( $this->mTriedSave && !$this->mTokenOk ) {
2056                         if ( $this->mTokenOkExceptSuffix ) {
2057                                 $note = wfMsg( 'token_suffix_mismatch' );
2058                         } else {
2059                                 $note = wfMsg( 'session_fail_preview' );
2060                         }
2061                 } elseif ( $this->incompleteForm ) {
2062                         $note = wfMsg( 'edit_form_incomplete' );
2063                 } else {
2064                         $note = wfMsg( 'previewnote' );
2065                 }
2066
2067                 $parserOptions = ParserOptions::newFromUser( $wgUser );
2068                 $parserOptions->setEditSection( false );
2069                 $parserOptions->setIsPreview( true );
2070                 $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
2071
2072                 global $wgRawHtml;
2073                 if ( $wgRawHtml && !$this->mTokenOk ) {
2074                         // Could be an offsite preview attempt. This is very unsafe if
2075                         // HTML is enabled, as it could be an attack.
2076                         $parsedNote = '';
2077                         if ( $this->textbox1 !== '' ) {
2078                                 // Do not put big scary notice, if previewing the empty
2079                                 // string, which happens when you initially edit
2080                                 // a category page, due to automatic preview-on-open.
2081                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
2082                                         wfMsg( 'session_fail_preview_html' ) . "</div>", true, /* interface */true );
2083                         }
2084                         wfProfileOut( __METHOD__ );
2085                         return $parsedNote;
2086                 }
2087
2088                 # don't parse non-wikitext pages, show message about preview
2089                 # XXX: stupid php bug won't let us use $this->getContextTitle()->isCssJsSubpage() here -- This note has been there since r3530. Sure the bug was fixed time ago?
2090
2091                 if ( $this->isCssJsSubpage || !$this->mTitle->isWikitextPage() ) {
2092                         if( $this->mTitle->isCssJsSubpage() ) {
2093                                 $level = 'user';
2094                         } elseif( $this->mTitle->isCssOrJsPage() ) {
2095                                 $level = 'site';
2096                         } else {
2097                                 $level = false;
2098                         }
2099
2100                         # Used messages to make sure grep find them:
2101                         # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
2102                         if( $level ) {
2103                                 if (preg_match( "/\\.css$/", $this->mTitle->getText() ) ) {
2104                                         $previewtext = "<div id='mw-{$level}csspreview'>\n" . wfMsg( "{$level}csspreview" ) . "\n</div>";
2105                                         $class = "mw-code mw-css";
2106                                 } elseif (preg_match( "/\\.js$/", $this->mTitle->getText() ) ) {
2107                                         $previewtext = "<div id='mw-{$level}jspreview'>\n" . wfMsg( "{$level}jspreview" ) . "\n</div>";
2108                                         $class = "mw-code mw-js";
2109                                 } else {
2110                                         throw new MWException( 'A CSS/JS (sub)page but which is not css nor js!' );
2111                                 }
2112                         }
2113
2114                         $parserOptions->setTidy( true );
2115                         $parserOutput = $wgParser->parse( $previewtext, $this->mTitle, $parserOptions );
2116                         $previewHTML = $parserOutput->mText;
2117                         $previewHTML .= "<pre class=\"$class\" dir=\"ltr\">\n" . htmlspecialchars( $this->textbox1 ) . "\n</pre>\n";
2118                 } else {
2119                         $rt = Title::newFromRedirectArray( $this->textbox1 );
2120                         if ( $rt ) {
2121                                 $previewHTML = $this->mArticle->viewRedirect( $rt, false );
2122                         } else {
2123                                 $toparse = $this->textbox1;
2124
2125                                 # If we're adding a comment, we need to show the
2126                                 # summary as the headline
2127                                 if ( $this->section == "new" && $this->summary != "" ) {
2128                                         $toparse = "== {$this->summary} ==\n\n" . $toparse;
2129                                 }
2130
2131                                 wfRunHooks( 'EditPageGetPreviewText', array( $this, &$toparse ) );
2132
2133                                 $parserOptions->setTidy( true );
2134                                 $parserOptions->enableLimitReport();
2135                                 $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ),
2136                                         $this->mTitle, $parserOptions );
2137
2138                                 $previewHTML = $parserOutput->getText();
2139                                 $this->mParserOutput = $parserOutput;
2140                                 $wgOut->addParserOutputNoText( $parserOutput );
2141
2142                                 if ( count( $parserOutput->getWarnings() ) ) {
2143                                         $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
2144                                 }
2145                         }
2146                 }
2147
2148                 if( $this->isConflict ) {
2149                         $conflict = '<h2 id="mw-previewconflict">' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
2150                 } else {
2151                         $conflict = '<hr />';
2152                 }
2153
2154                 $previewhead = "<div class='previewnote'>\n" .
2155                         '<h2 id="mw-previewheader">' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>" .
2156                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
2157
2158                 $pageLang = $this->mTitle->getPageLanguage();
2159                 $attribs = array( 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
2160                         'class' => 'mw-content-'.$pageLang->getDir() );
2161                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
2162
2163                 wfProfileOut( __METHOD__ );
2164                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
2165         }
2166
2167         /**
2168          * @return Array
2169          */
2170         function getTemplates() {
2171                 if ( $this->preview || $this->section != '' ) {
2172                         $templates = array();
2173                         if ( !isset( $this->mParserOutput ) ) {
2174                                 return $templates;
2175                         }
2176                         foreach( $this->mParserOutput->getTemplates() as $ns => $template) {
2177                                 foreach( array_keys( $template ) as $dbk ) {
2178                                         $templates[] = Title::makeTitle($ns, $dbk);
2179                                 }
2180                         }
2181                         return $templates;
2182                 } else {
2183                         return $this->mArticle->getUsedTemplates();
2184                 }
2185         }
2186
2187         /**
2188          * Call the stock "user is blocked" page
2189          */
2190         function blockedPage() {
2191                 global $wgOut;
2192                 $wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
2193
2194                 # If the user made changes, preserve them when showing the markup
2195                 # (This happens when a user is blocked during edit, for instance)
2196                 $first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
2197                 if ( $first ) {
2198                         $source = $this->mTitle->exists() ? $this->getContent() : false;
2199                 } else {
2200                         $source = $this->textbox1;
2201                 }
2202
2203                 # Spit out the source or the user's modified version
2204                 if ( $source !== false ) {
2205                         $wgOut->addHTML( '<hr />' );
2206                         $wgOut->addWikiMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() );
2207                         $this->showTextbox1( array( 'readonly' ), $source );
2208                 }
2209         }
2210
2211         /**
2212          * Produce the stock "please login to edit pages" page
2213          */
2214         function userNotLoggedInPage() {
2215                 global $wgOut;
2216
2217                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
2218                 $loginLink = Linker::linkKnown(
2219                         $loginTitle,
2220                         wfMsgHtml( 'loginreqlink' ),
2221                         array(),
2222                         array( 'returnto' => $this->getContextTitle()->getPrefixedText() )
2223                 );
2224
2225                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
2226                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2227                 $wgOut->setArticleRelated( false );
2228
2229                 $wgOut->addHTML( wfMessage( 'whitelistedittext' )->rawParams( $loginLink )->parse() );
2230                 $wgOut->returnToMain( false, $this->getContextTitle() );
2231         }
2232
2233         /**
2234          * Creates a basic error page which informs the user that
2235          * they have attempted to edit a nonexistent section.
2236          */
2237         function noSuchSectionPage() {
2238                 global $wgOut;
2239
2240                 $wgOut->setPageTitle( wfMsg( 'nosuchsectiontitle' ) );
2241                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2242                 $wgOut->setArticleRelated( false );
2243
2244                 $res = wfMsgExt( 'nosuchsectiontext', 'parse', $this->section );
2245                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
2246                 $wgOut->addHTML( $res );
2247
2248                 $wgOut->returnToMain( false, $this->mTitle );
2249         }
2250
2251         /**
2252          * Produce the stock "your edit contains spam" page
2253          *
2254          * @param $match Text which triggered one or more filters
2255          * @deprecated since 1.17 Use method spamPageWithContent() instead
2256          */
2257         static function spamPage( $match = false ) {
2258                 global $wgOut, $wgTitle;
2259
2260                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
2261                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2262                 $wgOut->setArticleRelated( false );
2263
2264                 $wgOut->addHTML( '<div id="spamprotected">' );
2265                 $wgOut->addWikiMsg( 'spamprotectiontext' );
2266                 if ( $match ) {
2267                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
2268                 }
2269                 $wgOut->addHTML( '</div>' );
2270
2271                 $wgOut->returnToMain( false, $wgTitle );
2272         }
2273
2274         /**
2275          * Show "your edit contains spam" page with your diff and text
2276          *
2277          * @param $match Text which triggered one or more filters
2278          */
2279         public function spamPageWithContent( $match = false ) {
2280                 global $wgOut;
2281                 $this->textbox2 = $this->textbox1;
2282
2283                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
2284                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2285                 $wgOut->setArticleRelated( false );
2286
2287                 $wgOut->addHTML( '<div id="spamprotected">' );
2288                 $wgOut->addWikiMsg( 'spamprotectiontext' );
2289                 if ( $match ) {
2290                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
2291                 }
2292                 $wgOut->addHTML( '</div>' );
2293
2294                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2295                 $de = new DifferenceEngine( $this->mTitle );
2296                 $de->setText( $this->getContent(), $this->textbox2 );
2297                 $de->showDiff( wfMsg( "storedversion" ), wfMsgExt( 'yourtext', 'parseinline' ) );
2298
2299                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2300                 $this->showTextbox2();
2301
2302                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
2303         }
2304
2305
2306         /**
2307          * @private
2308          * @todo document
2309          *
2310          * @parma $editText string
2311          *
2312          * @return bool
2313          */
2314         function mergeChangesInto( &$editText ){
2315                 wfProfileIn( __METHOD__ );
2316
2317                 $db = wfGetDB( DB_MASTER );
2318
2319                 // This is the revision the editor started from
2320                 $baseRevision = $this->getBaseRevision();
2321                 if ( is_null( $baseRevision ) ) {
2322                         wfProfileOut( __METHOD__ );
2323                         return false;
2324                 }
2325                 $baseText = $baseRevision->getText();
2326
2327                 // The current state, we want to merge updates into it
2328                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2329                 if ( is_null( $currentRevision ) ) {
2330                         wfProfileOut( __METHOD__ );
2331                         return false;
2332                 }
2333                 $currentText = $currentRevision->getText();
2334
2335                 $result = '';
2336                 if ( wfMerge( $baseText, $editText, $currentText, $result ) ) {
2337                         $editText = $result;
2338                         wfProfileOut( __METHOD__ );
2339                         return true;
2340                 } else {
2341                         wfProfileOut( __METHOD__ );
2342                         return false;
2343                 }
2344         }
2345
2346         /**
2347          * Check if the browser is on a blacklist of user-agents known to
2348          * mangle UTF-8 data on form submission. Returns true if Unicode
2349          * should make it through, false if it's known to be a problem.
2350          * @return bool
2351          * @private
2352          */
2353         function checkUnicodeCompliantBrowser() {
2354                 global $wgBrowserBlackList;
2355                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
2356                         // No User-Agent header sent? Trust it by default...
2357                         return true;
2358                 }
2359                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
2360                 foreach ( $wgBrowserBlackList as $browser ) {
2361                         if ( preg_match($browser, $currentbrowser) ) {
2362                                 return false;
2363                         }
2364                 }
2365                 return true;
2366         }
2367
2368         /**
2369          * Format an anchor fragment as it would appear for a given section name
2370          * @param $text String
2371          * @return String
2372          * @private
2373          */
2374         function sectionAnchor( $text ) {
2375                 global $wgParser;
2376                 return $wgParser->guessSectionNameFromWikiText( $text );
2377         }
2378
2379         /**
2380          * Shows a bulletin board style toolbar for common editing functions.
2381          * It can be disabled in the user preferences.
2382          * The necessary JavaScript code can be found in skins/common/edit.js.
2383          *
2384          * @return string
2385          */
2386         static function getEditToolbar() {
2387                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
2388                 global $wgUseTeX, $wgEnableUploads, $wgForeignFileRepos;
2389
2390                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
2391
2392                 /**
2393                  * $toolarray is an array of arrays each of which includes the
2394                  * filename of the button image (without path), the opening
2395                  * tag, the closing tag, optionally a sample text that is
2396                  * inserted between the two when no selection is highlighted
2397                  * and.  The tip text is shown when the user moves the mouse
2398                  * over the button.
2399                  *
2400                  * Also here: accesskeys (key), which are not used yet until
2401                  * someone can figure out a way to make them work in
2402                  * IE. However, we should make sure these keys are not defined
2403                  * on the edit page.
2404                  */
2405                 $toolarray = array(
2406                         array(
2407                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
2408                                 'id'     => 'mw-editbutton-bold',
2409                                 'open'   => '\'\'\'',
2410                                 'close'  => '\'\'\'',
2411                                 'sample' => wfMsg( 'bold_sample' ),
2412                                 'tip'    => wfMsg( 'bold_tip' ),
2413                                 'key'    => 'B'
2414                         ),
2415                         array(
2416                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
2417                                 'id'     => 'mw-editbutton-italic',
2418                                 'open'   => '\'\'',
2419                                 'close'  => '\'\'',
2420                                 'sample' => wfMsg( 'italic_sample' ),
2421                                 'tip'    => wfMsg( 'italic_tip' ),
2422                                 'key'    => 'I'
2423                         ),
2424                         array(
2425                                 'image'  => $wgLang->getImageFile( 'button-link' ),
2426                                 'id'     => 'mw-editbutton-link',
2427                                 'open'   => '[[',
2428                                 'close'  => ']]',
2429                                 'sample' => wfMsg( 'link_sample' ),
2430                                 'tip'    => wfMsg( 'link_tip' ),
2431                                 'key'    => 'L'
2432                         ),
2433                         array(
2434                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
2435                                 'id'     => 'mw-editbutton-extlink',
2436                                 'open'   => '[',
2437                                 'close'  => ']',
2438                                 'sample' => wfMsg( 'extlink_sample' ),
2439                                 'tip'    => wfMsg( 'extlink_tip' ),
2440                                 'key'    => 'X'
2441                         ),
2442                         array(
2443                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
2444                                 'id'     => 'mw-editbutton-headline',
2445                                 'open'   => "\n== ",
2446                                 'close'  => " ==\n",
2447                                 'sample' => wfMsg( 'headline_sample' ),
2448                                 'tip'    => wfMsg( 'headline_tip' ),
2449                                 'key'    => 'H'
2450                         ),
2451                         $imagesAvailable ? array(
2452                                 'image'  => $wgLang->getImageFile( 'button-image' ),
2453                                 'id'     => 'mw-editbutton-image',
2454                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
2455                                 'close'  => ']]',
2456                                 'sample' => wfMsg( 'image_sample' ),
2457                                 'tip'    => wfMsg( 'image_tip' ),
2458                                 'key'    => 'D',
2459                         ) : false,
2460                         $imagesAvailable ? array(
2461                                 'image'  => $wgLang->getImageFile( 'button-media' ),
2462                                 'id'     => 'mw-editbutton-media',
2463                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
2464                                 'close'  => ']]',
2465                                 'sample' => wfMsg( 'media_sample' ),
2466                                 'tip'    => wfMsg( 'media_tip' ),
2467                                 'key'    => 'M'
2468                         ) : false,
2469                         $wgUseTeX ?     array(
2470                                 'image'  => $wgLang->getImageFile( 'button-math' ),
2471                                 'id'     => 'mw-editbutton-math',
2472                                 'open'   => "<math>",
2473                                 'close'  => "</math>",
2474                                 'sample' => wfMsg( 'math_sample' ),
2475                                 'tip'    => wfMsg( 'math_tip' ),
2476                                 'key'    => 'C'
2477                         ) : false,
2478                         array(
2479                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
2480                                 'id'     => 'mw-editbutton-nowiki',
2481                                 'open'   => "<nowiki>",
2482                                 'close'  => "</nowiki>",
2483                                 'sample' => wfMsg( 'nowiki_sample' ),
2484                                 'tip'    => wfMsg( 'nowiki_tip' ),
2485                                 'key'    => 'N'
2486                         ),
2487                         array(
2488                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
2489                                 'id'     => 'mw-editbutton-signature',
2490                                 'open'   => '--~~~~',
2491                                 'close'  => '',
2492                                 'sample' => '',
2493                                 'tip'    => wfMsg( 'sig_tip' ),
2494                                 'key'    => 'Y'
2495                         ),
2496                         array(
2497                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
2498                                 'id'     => 'mw-editbutton-hr',
2499                                 'open'   => "\n----\n",
2500                                 'close'  => '',
2501                                 'sample' => '',
2502                                 'tip'    => wfMsg( 'hr_tip' ),
2503                                 'key'    => 'R'
2504                         )
2505                 );
2506
2507                 $script = '';
2508                 foreach ( $toolarray as $tool ) {
2509                         if ( !$tool ) {
2510                                 continue;
2511                         }
2512
2513                         $params = array(
2514                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
2515                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
2516                                 // Older browsers show a "speedtip" type message only for ALT.
2517                                 // Ideally these should be different, realistically they
2518                                 // probably don't need to be.
2519                                 $tip = $tool['tip'],
2520                                 $open = $tool['open'],
2521                                 $close = $tool['close'],
2522                                 $sample = $tool['sample'],
2523                                 $cssId = $tool['id'],
2524                         );
2525
2526                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
2527                 }
2528                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
2529
2530                 $toolbar = '<div id="toolbar"></div>';
2531
2532                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
2533
2534                 return $toolbar;
2535         }
2536
2537         /**
2538          * Returns an array of html code of the following checkboxes:
2539          * minor and watch
2540          *
2541          * @param $tabindex Current tabindex
2542          * @param $checked Array of checkbox => bool, where bool indicates the checked
2543          *                 status of the checkbox
2544          *
2545          * @return array
2546          */
2547         public function getCheckboxes( &$tabindex, $checked ) {
2548                 global $wgUser;
2549
2550                 $checkboxes = array();
2551
2552                 // don't show the minor edit checkbox if it's a new page or section
2553                 if ( !$this->isNew ) {
2554                         $checkboxes['minor'] = '';
2555                         $minorLabel = wfMsgExt( 'minoredit', array( 'parseinline' ) );
2556                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
2557                                 $attribs = array(
2558                                         'tabindex'  => ++$tabindex,
2559                                         'accesskey' => wfMsg( 'accesskey-minoredit' ),
2560                                         'id'        => 'wpMinoredit',
2561                                 );
2562                                 $checkboxes['minor'] =
2563                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
2564                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
2565                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
2566                                         ">{$minorLabel}</label>";
2567                         }
2568                 }
2569
2570                 $watchLabel = wfMsgExt( 'watchthis', array( 'parseinline' ) );
2571                 $checkboxes['watch'] = '';
2572                 if ( $wgUser->isLoggedIn() ) {
2573                         $attribs = array(
2574                                 'tabindex'  => ++$tabindex,
2575                                 'accesskey' => wfMsg( 'accesskey-watch' ),
2576                                 'id'        => 'wpWatchthis',
2577                         );
2578                         $checkboxes['watch'] =
2579                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
2580                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
2581                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
2582                                 ">{$watchLabel}</label>";
2583                 }
2584                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
2585                 return $checkboxes;
2586         }
2587
2588         /**
2589          * Returns an array of html code of the following buttons:
2590          * save, diff, preview and live
2591          *
2592          * @param $tabindex Current tabindex
2593          *
2594          * @return array
2595          */
2596         public function getEditButtons( &$tabindex ) {
2597                 $buttons = array();
2598
2599                 $temp = array(
2600                         'id'        => 'wpSave',
2601                         'name'      => 'wpSave',
2602                         'type'      => 'submit',
2603                         'tabindex'  => ++$tabindex,
2604                         'value'     => wfMsg( 'savearticle' ),
2605                         'accesskey' => wfMsg( 'accesskey-save' ),
2606                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
2607                 );
2608                 $buttons['save'] = Xml::element('input', $temp, '');
2609
2610                 ++$tabindex; // use the same for preview and live preview
2611                 $temp = array(
2612                         'id'        => 'wpPreview',
2613                         'name'      => 'wpPreview',
2614                         'type'      => 'submit',
2615                         'tabindex'  => $tabindex,
2616                         'value'     => wfMsg( 'showpreview' ),
2617                         'accesskey' => wfMsg( 'accesskey-preview' ),
2618                         'title'     => wfMsg( 'tooltip-preview' ) . ' [' . wfMsg( 'accesskey-preview' ) . ']',
2619                 );
2620                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
2621                 $buttons['live'] = '';
2622
2623                 $temp = array(
2624                         'id'        => 'wpDiff',
2625                         'name'      => 'wpDiff',
2626                         'type'      => 'submit',
2627                         'tabindex'  => ++$tabindex,
2628                         'value'     => wfMsg( 'showdiff' ),
2629                         'accesskey' => wfMsg( 'accesskey-diff' ),
2630                         'title'     => wfMsg( 'tooltip-diff' ) . ' [' . wfMsg( 'accesskey-diff' ) . ']',
2631                 );
2632                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
2633
2634                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
2635                 return $buttons;
2636         }
2637
2638         /**
2639          * Output preview text only. This can be sucked into the edit page
2640          * via JavaScript, and saves the server time rendering the skin as
2641          * well as theoretically being more robust on the client (doesn't
2642          * disturb the edit box's undo history, won't eat your text on
2643          * failure, etc).
2644          *
2645          * @todo This doesn't include category or interlanguage links.
2646          *       Would need to enhance it a bit, <s>maybe wrap them in XML
2647          *       or something...</s> that might also require more skin
2648          *       initialization, so check whether that's a problem.
2649          */
2650         function livePreview() {
2651                 global $wgOut;
2652                 $wgOut->disable();
2653                 header( 'Content-type: text/xml; charset=utf-8' );
2654                 header( 'Cache-control: no-cache' );
2655
2656                 $previewText = $this->getPreviewText();
2657                 #$categories = $skin->getCategoryLinks();
2658
2659                 $s =
2660                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
2661                 Xml::tags( 'livepreview', null,
2662                         Xml::element( 'preview', null, $previewText )
2663                         #.      Xml::element( 'category', null, $categories )
2664                 );
2665                 echo $s;
2666         }
2667
2668         /**
2669          * @return string
2670          */
2671         public function getCancelLink() {
2672                 $cancelParams = array();
2673                 if ( !$this->isConflict && $this->mArticle->getOldID() > 0 ) {
2674                         $cancelParams['oldid'] = $this->mArticle->getOldID();
2675                 }
2676
2677                 return Linker::linkKnown(
2678                         $this->getContextTitle(),
2679                         wfMsgExt( 'cancel', array( 'parseinline' ) ),
2680                         array( 'id' => 'mw-editform-cancel' ),
2681                         $cancelParams
2682                 );
2683         }
2684
2685         /**
2686          * Get a diff between the current contents of the edit box and the
2687          * version of the page we're editing from.
2688          *
2689          * If this is a section edit, we'll replace the section as for final
2690          * save and then make a comparison.
2691          */
2692         function showDiff() {
2693                 $oldtext = $this->mArticle->fetchContent();
2694                 $newtext = $this->mArticle->replaceSection(
2695                         $this->section, $this->textbox1, $this->summary, $this->edittime );
2696
2697                 wfRunHooks( 'EditPageGetDiffText', array( $this, &$newtext ) );
2698
2699                 $newtext = $this->mArticle->preSaveTransform( $newtext );
2700                 $oldtitle = wfMsgExt( 'currentrev', array( 'parseinline' ) );
2701                 $newtitle = wfMsgExt( 'yourtext', array( 'parseinline' ) );
2702                 if ( $oldtext !== false  || $newtext != '' ) {
2703                         $de = new DifferenceEngine( $this->mTitle );
2704                         $de->setText( $oldtext, $newtext );
2705                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2706                         $de->showDiffStyle();
2707                 } else {
2708                         $difftext = '';
2709                 }
2710
2711                 global $wgOut;
2712                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2713         }
2714
2715         /**
2716          * Filter an input field through a Unicode de-armoring process if it
2717          * came from an old browser with known broken Unicode editing issues.
2718          *
2719          * @param $request WebRequest
2720          * @param $field String
2721          * @return String
2722          * @private
2723          */
2724         function safeUnicodeInput( $request, $field ) {
2725                 $text = rtrim( $request->getText( $field ) );
2726                 return $request->getBool( 'safemode' )
2727                         ? $this->unmakesafe( $text )
2728                         : $text;
2729         }
2730
2731         /**
2732          * @param $request WebRequest
2733          * @param $text string
2734          * @return string
2735          */
2736         function safeUnicodeText( $request, $text ) {
2737                 $text = rtrim( $text );
2738                 return $request->getBool( 'safemode' )
2739                         ? $this->unmakesafe( $text )
2740                         : $text;
2741         }
2742
2743         /**
2744          * Filter an output field through a Unicode armoring process if it is
2745          * going to an old browser with known broken Unicode editing issues.
2746          *
2747          * @param $text String
2748          * @return String
2749          * @private
2750          */
2751         function safeUnicodeOutput( $text ) {
2752                 global $wgContLang;
2753                 $codedText = $wgContLang->recodeForEdit( $text );
2754                 return $this->checkUnicodeCompliantBrowser()
2755                         ? $codedText
2756                         : $this->makesafe( $codedText );
2757         }
2758
2759         /**
2760          * A number of web browsers are known to corrupt non-ASCII characters
2761          * in a UTF-8 text editing environment. To protect against this,
2762          * detected browsers will be served an armored version of the text,
2763          * with non-ASCII chars converted to numeric HTML character references.
2764          *
2765          * Preexisting such character references will have a 0 added to them
2766          * to ensure that round-trips do not alter the original data.
2767          *
2768          * @param $invalue String
2769          * @return String
2770          * @private
2771          */
2772         function makesafe( $invalue ) {
2773                 // Armor existing references for reversability.
2774                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
2775
2776                 $bytesleft = 0;
2777                 $result = "";
2778                 $working = 0;
2779                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2780                         $bytevalue = ord( $invalue[$i] );
2781                         if ( $bytevalue <= 0x7F ) { //0xxx xxxx
2782                                 $result .= chr( $bytevalue );
2783                                 $bytesleft = 0;
2784                         } elseif ( $bytevalue <= 0xBF ) { //10xx xxxx
2785                                 $working = $working << 6;
2786                                 $working += ($bytevalue & 0x3F);
2787                                 $bytesleft--;
2788                                 if ( $bytesleft <= 0 ) {
2789                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
2790                                 }
2791                         } elseif ( $bytevalue <= 0xDF ) { //110x xxxx
2792                                 $working = $bytevalue & 0x1F;
2793                                 $bytesleft = 1;
2794                         } elseif ( $bytevalue <= 0xEF ) { //1110 xxxx
2795                                 $working = $bytevalue & 0x0F;
2796                                 $bytesleft = 2;
2797                         } else { //1111 0xxx
2798                                 $working = $bytevalue & 0x07;
2799                                 $bytesleft = 3;
2800                         }
2801                 }
2802                 return $result;
2803         }
2804
2805         /**
2806          * Reverse the previously applied transliteration of non-ASCII characters
2807          * back to UTF-8. Used to protect data from corruption by broken web browsers
2808          * as listed in $wgBrowserBlackList.
2809          *
2810          * @param $invalue String
2811          * @return String
2812          * @private
2813          */
2814         function unmakesafe( $invalue ) {
2815                 $result = "";
2816                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2817                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i+3] != '0' ) ) {
2818                                 $i += 3;
2819                                 $hexstring = "";
2820                                 do {
2821                                         $hexstring .= $invalue[$i];
2822                                         $i++;
2823                                 } while( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
2824
2825                                 // Do some sanity checks. These aren't needed for reversability,
2826                                 // but should help keep the breakage down if the editor
2827                                 // breaks one of the entities whilst editing.
2828                                 if ( (substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6) ) {
2829                                         $codepoint = hexdec($hexstring);
2830                                         $result .= codepointToUtf8( $codepoint );
2831                                 } else {
2832                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
2833                                 }
2834                         } else {
2835                                 $result .= substr( $invalue, $i, 1 );
2836                         }
2837                 }
2838                 // reverse the transform that we made for reversability reasons.
2839                 return strtr( $result, array( "&#x0" => "&#x" ) );
2840         }
2841
2842         function noCreatePermission() {
2843                 global $wgOut;
2844                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
2845                 $wgOut->addWikiMsg( 'nocreatetext' );
2846         }
2847
2848         /**
2849          * Attempt submission
2850          * @return bool false if output is done, true if the rest of the form should be displayed
2851          */
2852         function attemptSave() {
2853                 global $wgUser, $wgOut;
2854
2855                 $resultDetails = false;
2856                 # Allow bots to exempt some edits from bot flagging
2857                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
2858                 $status = $this->internalAttemptSave( $resultDetails, $bot );
2859                 // FIXME: once the interface for internalAttemptSave() is made nicer, this should use the message in $status
2860
2861                 if ( $status->value == self::AS_SUCCESS_UPDATE || $status->value == self::AS_SUCCESS_NEW_ARTICLE ) {
2862                         $this->didSave = true;
2863                 }
2864
2865                 switch ( $status->value ) {
2866                         case self::AS_HOOK_ERROR_EXPECTED:
2867                         case self::AS_CONTENT_TOO_BIG:
2868                         case self::AS_ARTICLE_WAS_DELETED:
2869                         case self::AS_CONFLICT_DETECTED:
2870                         case self::AS_SUMMARY_NEEDED:
2871                         case self::AS_TEXTBOX_EMPTY:
2872                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
2873                         case self::AS_END:
2874                                 return true;
2875
2876                         case self::AS_HOOK_ERROR:
2877                         case self::AS_FILTERING:
2878                                 return false;
2879
2880                         case self::AS_SUCCESS_NEW_ARTICLE:
2881                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
2882                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) );
2883                                 return false;
2884
2885                         case self::AS_SUCCESS_UPDATE:
2886                                 $extraQuery = '';
2887                                 $sectionanchor = $resultDetails['sectionanchor'];
2888
2889                                 // Give extensions a chance to modify URL query on update
2890                                 wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this->mArticle, &$sectionanchor, &$extraQuery ) );
2891
2892                                 if ( $resultDetails['redirect'] ) {
2893                                         if ( $extraQuery == '' ) {
2894                                                 $extraQuery = 'redirect=no';
2895                                         } else {
2896                                                 $extraQuery = 'redirect=no&' . $extraQuery;
2897                                         }
2898                                 }
2899                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
2900                                 return false;
2901
2902                         case self::AS_SPAM_ERROR:
2903                                 $this->spamPageWithContent( $resultDetails['spam'] );
2904                                 return false;
2905
2906                         case self::AS_BLOCKED_PAGE_FOR_USER:
2907                                 $this->blockedPage();
2908                                 return false;
2909
2910                         case self::AS_IMAGE_REDIRECT_ANON:
2911                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
2912                                 return false;
2913
2914                         case self::AS_READ_ONLY_PAGE_ANON:
2915                                 $this->userNotLoggedInPage();
2916                                 return false;
2917
2918                         case self::AS_READ_ONLY_PAGE_LOGGED:
2919                         case self::AS_READ_ONLY_PAGE:
2920                                 $wgOut->readOnlyPage();
2921                                 return false;
2922
2923                         case self::AS_RATE_LIMITED:
2924                                 $wgOut->rateLimited();
2925                                 return false;
2926
2927                         case self::AS_NO_CREATE_PERMISSION:
2928                                 $this->noCreatePermission();
2929                                 return false;
2930
2931                         case self::AS_BLANK_ARTICLE:
2932                                 $wgOut->redirect( $this->getContextTitle()->getFullURL() );
2933                                 return false;
2934
2935                         case self::AS_IMAGE_REDIRECT_LOGGED:
2936                                 $wgOut->permissionRequired( 'upload' );
2937                                 return false;
2938                 }
2939         }
2940
2941         /**
2942          * @return Revision
2943          */
2944         function getBaseRevision() {
2945                 if ( !$this->mBaseRevision ) {
2946                         $db = wfGetDB( DB_MASTER );
2947                         $baseRevision = Revision::loadFromTimestamp(
2948                                 $db, $this->mTitle, $this->edittime );
2949                         return $this->mBaseRevision = $baseRevision;
2950                 } else {
2951                         return $this->mBaseRevision;
2952                 }
2953         }
2954 }