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