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 = 'submit';
  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         public function __construct( $article ) {
 120                 $this->mArticle = $article;
 121                 $this->mTitle = $article->getTitle();
 122         }
 123
 124         /**
 125          * @return Article
 126          */
 127         public function getArticle() {
 128                 return $this->mArticle;
 129         }
 130
 131         /**
 132          * @since 1.19
 133          * @return Title
 134          */
 135         public function getTitle() {
 136                 return $this->mTitle;
 137         }
 138
 139         /**
 140          * Set the context Title object
 141          *
 142          * @param $title Title object or null
 143          */
 144         public function setContextTitle( $title ) {
 145                 $this->mContextTitle = $title;
 146         }
 147
 148         /**
 149          * Get the context title object.
 150          * If not set, $wgTitle will be returned. This behavior might changed in
 151          * the future to return $this->mTitle instead.
 152          *
 153          * @return Title object
 154          */
 155         public function getContextTitle() {
 156                 if ( is_null( $this->mContextTitle ) ) {
 157                         global $wgTitle;
 158                         return $wgTitle;
 159                 } else {
 160                         return $this->mContextTitle;
 161                 }
 162         }
 163
 164         /**
 165          * Fetch initial editing page content.
 166          *
 167          * @param $def_text string
 168          * @return mixed string on success, $def_text for invalid sections
 169          * @private
 170          */
 171         function getContent( $def_text = '' ) {
 172                 global $wgOut, $wgRequest, $wgParser;
 173
 174                 wfProfileIn( __METHOD__ );
 175                 # Get variables from query string :P
 176                 $section = $wgRequest->getVal( 'section' );
 177
 178                 $preload = $wgRequest->getVal( 'preload',
 179                         // Custom preload text for new sections
 180                         $section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 181                 $undoafter = $wgRequest->getVal( 'undoafter' );
 182                 $undo = $wgRequest->getVal( 'undo' );
 183
 184                 // For message page not locally set, use the i18n message.
 185                 // For other non-existent articles, use preload text if any.
 186                 if ( !$this->mTitle->exists() ) {
 187                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 188                                 # If this is a system message, get the default text.
 189                                 $text = $this->mTitle->getDefaultMessageText();
 190                                 if( $text === false ) {
 191                                         $text = $this->getPreloadedText( $preload );
 192                                 }
 193                         } else {
 194                                 # If requested, preload some text.
 195                                 $text = $this->getPreloadedText( $preload );
 196                         }
 197                 // For existing pages, get text based on "undo" or section parameters.
 198                 } else {
 199                         $text = $this->mArticle->getContent();
 200                         if ( $undo > 0 && $undoafter > 0 && $undo < $undoafter ) {
 201                                 # If they got undoafter and undo round the wrong way, switch them
 202                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 203                         }
 204                         if ( $undo > 0 && $undo > $undoafter ) {
 205                                 # Undoing a specific edit overrides section editing; section-editing
 206                                 # doesn't work with undoing.
 207                                 if ( $undoafter ) {
 208                                         $undorev = Revision::newFromId( $undo );
 209                                         $oldrev = Revision::newFromId( $undoafter );
 210                                 } else {
 211                                         $undorev = Revision::newFromId( $undo );
 212                                         $oldrev = $undorev ? $undorev->getPrevious() : null;
 213                                 }
 214
 215                                 # Sanity check, make sure it's the right page,
 216                                 # the revisions exist and they were not deleted.
 217                                 # Otherwise, $text will be left as-is.
 218                                 if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 219                                         $undorev->getPage() == $oldrev->getPage() &&
 220                                         $undorev->getPage() == $this->mArticle->getID() &&
 221                                         !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 222                                         !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 223
 224                                         $undotext = $this->mArticle->getUndoText( $undorev, $oldrev );
 225                                         if ( $undotext === false ) {
 226                                                 # Warn the user that something went wrong
 227                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-failure">' .
 228                                                         wfMsgNoTrans( 'undo-failure' ) . '</div>', true, /* interface */true );
 229                                         } else {
 230                                                 $text = $undotext;
 231                                                 # Inform the user of our success and set an automatic edit summary
 232                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="mw-undo-success">' .
 233                                                         wfMsgNoTrans( 'undo-success' ) . '</div>', true, /* interface */true );
 234                                                 $firstrev = $oldrev->getNext();
 235                                                 # If we just undid one rev, use an autosummary
 236                                                 if ( $firstrev->getId() == $undo ) {
 237                                                         $undoSummary = wfMsgForContent( 'undo-summary', $undo, $undorev->getUserText() );
 238                                                         if ( $this->summary === '' ) {
 239                                                                 $this->summary = $undoSummary;
 240                                                         } else {
 241                                                                 $this->summary = $undoSummary . wfMsgForContent( 'colon-separator' ) . $this->summary;
 242                                                         }
 243                                                         $this->undidRev = $undo;
 244                                                 }
 245                                                 $this->formtype = 'diff';
 246                                         }
 247                                 } else {
 248                                         // Failed basic sanity checks.
 249                                         // Older revisions may have been removed since the link
 250                                         // was created, or we may simply have got bogus input.
 251                                         $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-norev">' .
 252                                                 wfMsgNoTrans( 'undo-norev' ) . '</div>', true, /* interface */true );
 253                                 }
 254                         } elseif ( $section != '' ) {
 255                                 if ( $section == 'new' ) {
 256                                         $text = $this->getPreloadedText( $preload );
 257                                 } else {
 258                                         // Get section edit text (returns $def_text for invalid sections)
 259                                         $text = $wgParser->getSection( $text, $section, $def_text );
 260                                 }
 261                         }
 262                 }
 263
 264                 wfProfileOut( __METHOD__ );
 265                 return $text;
 266         }
 267
 268         /**
 269          * Use this method before edit() to preload some text into the edit box
 270          *
 271          * @param $text string
 272          */
 273         public function setPreloadedText( $text ) {
 274                 $this->mPreloadText = $text;
 275         }
 276
 277         /**
 278          * Get the contents to be preloaded into the box, either set by
 279          * an earlier setPreloadText() or by loading the given page.
 280          *
 281          * @param $preload String: representing the title to preload from.
 282          * @return String
 283          */
 284         protected function getPreloadedText( $preload ) {
 285                 global $wgUser, $wgParser;
 286                 if ( !empty( $this->mPreloadText ) ) {
 287                         return $this->mPreloadText;
 288                 } elseif ( $preload !== '' ) {
 289                         $title = Title::newFromText( $preload );
 290                         # Check for existence to avoid getting MediaWiki:Noarticletext
 291                         if ( isset( $title ) && $title->exists() && $title->userCanRead() ) {
 292                                 $article = new Article( $title );
 293
 294                                 if ( $article->isRedirect() ) {
 295                                         $title = Title::newFromRedirectRecurse( $article->getContent() );
 296                                         # Redirects to missing titles are displayed, to hidden pages are followed
 297                                         # Copying observed behaviour from ?action=view
 298                                         if ( $title->exists() ) {
 299                                                 if ($title->userCanRead() ) {
 300                                                         $article = new Article( $title );
 301                                                 } else {
 302                                                         return "";
 303                                                 }
 304                                         }
 305                                 }
 306                                 $parserOptions = ParserOptions::newFromUser( $wgUser );
 307                                 return $wgParser->getPreloadText( $article->getContent(), $title, $parserOptions );
 308                         }
 309                 }
 310                 return '';
 311         }
 312
 313         /**
 314          * Check if a page was deleted while the user was editing it, before submit.
 315          * Note that we rely on the logging table, which hasn't been always there,
 316          * but that doesn't matter, because this only applies to brand new
 317          * deletes.
 318          */
 319         protected function wasDeletedSinceLastEdit() {
 320                 if ( $this->deletedSinceEdit !== null ) {
 321                         return $this->deletedSinceEdit;
 322                 }
 323
 324                 $this->deletedSinceEdit = false;
 325
 326                 if ( $this->mTitle->isDeletedQuick() ) {
 327                         $this->lastDelete = $this->getLastDelete();
 328                         if ( $this->lastDelete ) {
 329                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
 330                                 if ( $deleteTime > $this->starttime ) {
 331                                         $this->deletedSinceEdit = true;
 332                                 }
 333                         }
 334                 }
 335
 336                 return $this->deletedSinceEdit;
 337         }
 338
 339         /**
 340          * Checks whether the user entered a skin name in uppercase,
 341          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 342          *
 343          * @return bool
 344          */
 345         protected function isWrongCaseCssJsPage() {
 346                 if( $this->mTitle->isCssJsSubpage() ) {
 347                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 348                         $skins = array_merge(
 349                                 array_keys( Skin::getSkinNames() ),
 350                                 array( 'common' )
 351                         );
 352                         return !in_array( $name, $skins )
 353                                 && in_array( strtolower( $name ), $skins );
 354                 } else {
 355                         return false;
 356                 }
 357         }
 358
 359         function submit() {
 360                 $this->edit();
 361         }
 362
 363         /**
 364          * This is the function that gets called for "action=edit". It
 365          * sets up various member variables, then passes execution to
 366          * another function, usually showEditForm()
 367          *
 368          * The edit form is self-submitting, so that when things like
 369          * preview and edit conflicts occur, we get the same form back
 370          * with the extra stuff added.  Only when the final submission
 371          * is made and all is well do we actually save and redirect to
 372          * the newly-edited page.
 373          */
 374         function edit() {
 375                 global $wgOut, $wgRequest, $wgUser;
 376                 // Allow extensions to modify/prevent this form or submission
 377                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 378                         return;
 379                 }
 380
 381                 wfProfileIn( __METHOD__ );
 382                 wfDebug( __METHOD__.": enter\n" );
 383
 384                 // If they used redlink=1 and the page exists, redirect to the main article
 385                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 386                         $wgOut->redirect( $this->mTitle->getFullURL() );
 387                         wfProfileOut( __METHOD__ );
 388                         return;
 389                 }
 390
 391                 $this->importFormData( $wgRequest );
 392                 $this->firsttime = false;
 393
 394                 if ( $this->live ) {
 395                         $this->livePreview();
 396                         wfProfileOut( __METHOD__ );
 397                         return;
 398                 }
 399
 400                 if ( wfReadOnly() && $this->save ) {
 401                         // Force preview
 402                         $this->save = false;
 403                         $this->preview = true;
 404                 }
 405
 406                 if ( $this->save ) {
 407                         $this->formtype = 'save';
 408                 } elseif ( $this->preview ) {
 409                         $this->formtype = 'preview';
 410                 } elseif ( $this->diff ) {
 411                         $this->formtype = 'diff';
 412                 } else { # First time through
 413                         $this->firsttime = true;
 414                         if ( $this->previewOnOpen() ) {
 415                                 $this->formtype = 'preview';
 416                         } else {
 417                                 $this->formtype = 'initial';
 418                         }
 419                 }
 420
 421                 $permErrors = $this->getEditPermissionErrors();
 422                 if ( $permErrors ) {
 423                         wfDebug( __METHOD__ . ": User can't edit\n" );
 424                         // Auto-block user's IP if the account was "hard" blocked
 425                         $wgUser->spreadAnyEditBlock();
 426
 427                         $this->displayPermissionsError( $permErrors );
 428
 429                         wfProfileOut( __METHOD__ );
 430                         return;
 431                 }
 432
 433                 $wgOut->addModules( array( 'mediawiki.action.edit' ) );
 434
 435                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
 436                         $wgOut->addModules( 'mediawiki.legacy.preview' );
 437                 }
 438                 // Bug #19334: textarea jumps when editing articles in IE8
 439                 $wgOut->addStyle( 'common/IE80Fixes.css', 'screen', 'IE 8' );
 440
 441                 wfProfileIn( __METHOD__."-business-end" );
 442
 443                 $this->isConflict = false;
 444                 // css / js subpages of user pages get a special treatment
 445                 $this->isCssJsSubpage       = $this->mTitle->isCssJsSubpage();
 446                 $this->isCssSubpage         = $this->mTitle->isCssSubpage();
 447                 $this->isJsSubpage          = $this->mTitle->isJsSubpage();
 448                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 449                 $this->isNew                = !$this->mTitle->exists() || $this->section == 'new';
 450
 451                 # Show applicable editing introductions
 452                 if ( $this->formtype == 'initial' || $this->firsttime )
 453                         $this->showIntro();
 454
 455                 if ( $this->mTitle->isTalkPage() ) {
 456                         $wgOut->addWikiMsg( 'talkpagetext' );
 457                 }
 458
 459                 # Optional notices on a per-namespace and per-page basis
 460                 $editnotice_ns   = 'editnotice-'.$this->mTitle->getNamespace();
 461                 $editnotice_ns_message = wfMessage( $editnotice_ns )->inContentLanguage();
 462                 if ( $editnotice_ns_message->exists() ) {
 463                         $wgOut->addWikiText( $editnotice_ns_message->plain() );
 464                 }
 465                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
 466                         $parts = explode( '/', $this->mTitle->getDBkey() );
 467                         $editnotice_base = $editnotice_ns;
 468                         while ( count( $parts ) > 0 ) {
 469                                 $editnotice_base .= '-'.array_shift( $parts );
 470                                 $editnotice_base_msg = wfMessage( $editnotice_base )->inContentLanguage();
 471                                 if ( $editnotice_base_msg->exists() ) {
 472                                         $wgOut->addWikiText( $editnotice_base_msg->plain()  );
 473                                 }
 474                         }
 475                 } else {
 476                         # Even if there are no subpages in namespace, we still don't want / in MW ns.
 477                         $editnoticeText = $editnotice_ns . '-' . str_replace( '/', '-', $this->mTitle->getDBkey() );
 478                         $editnoticeMsg = wfMessage( $editnoticeText )->inContentLanguage();
 479                         if ( $editnoticeMsg->exists() ) {
 480                                 $wgOut->addWikiText( $editnoticeMsg->plain() );
 481                         }
 482                 }
 483
 484                 # Attempt submission here.  This will check for edit conflicts,
 485                 # and redundantly check for locked database, blocked IPs, etc.
 486                 # that edit() already checked just in case someone tries to sneak
 487                 # in the back door with a hand-edited submission URL.
 488
 489                 if ( 'save' == $this->formtype ) {
 490                         if ( !$this->attemptSave() ) {
 491                                 wfProfileOut( __METHOD__."-business-end" );
 492                                 wfProfileOut( __METHOD__ );
 493                                 return;
 494                         }
 495                 }
 496
 497                 # First time through: get contents, set time for conflict
 498                 # checking, etc.
 499                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 500                         if ( $this->initialiseForm() === false ) {
 501                                 $this->noSuchSectionPage();
 502                                 wfProfileOut( __METHOD__."-business-end" );
 503                                 wfProfileOut( __METHOD__ );
 504                                 return;
 505                         }
 506                         if ( !$this->mTitle->getArticleId() )
 507                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 508                         else
 509                                 wfRunHooks( 'EditFormInitialText', array( $this ) );
 510                 }
 511
 512                 $this->showEditForm();
 513                 wfProfileOut( __METHOD__."-business-end" );
 514                 wfProfileOut( __METHOD__ );
 515         }
 516
 517         /**
 518          * @return array
 519          */
 520         protected function getEditPermissionErrors() {
 521                 global $wgUser;
 522                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 523                 # Can this title be created?
 524                 if ( !$this->mTitle->exists() ) {
 525                         $permErrors = array_merge( $permErrors,
 526                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 527                 }
 528                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 529                 $remove = array();
 530                 foreach( $permErrors as $error ) {
 531                         if ( ( $this->preview || $this->diff ) &&
 532                                 ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' ) )
 533                         {
 534                                 $remove[] = $error;
 535                         }
 536                 }
 537                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 538                 return $permErrors;
 539         }
 540
 541         /**
 542          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 543          * but with the following differences:
 544          * - If redlink=1, the user will be redirect to the page
 545          * - If there is content to display or the error occurs while either saving,
 546          *   previewing or showing the difference, it will be a
 547          *   "View source for ..." page displaying the source code after the error message.
 548          *
 549          * @since 1.19
 550          * @param $permErrors Array of permissions errors, as returned by
 551          *                    Title::getUserPermissionsErrors().
 552          */
 553         protected function displayPermissionsError( array $permErrors ) {
 554                 global $wgRequest, $wgOut;
 555
 556                 if ( $wgRequest->getBool( 'redlink' ) ) {
 557                         // The edit page was reached via a red link.
 558                         // Redirect to the article page and let them click the edit tab if
 559                         // they really want a permission error.
 560                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 561                         return;
 562                 }
 563
 564                 $content = $this->getContent();
 565
 566                 # Use the normal message if there's nothing to display
 567                 if ( $this->firsttime && $content === '' ) {
 568                         $action = $this->mTitle->exists() ? 'edit' :
 569                                 ( $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 570                         throw new PermissionsError( $action, $permErrors );
 571                 }
 572
 573                 $wgOut->setPageTitle( wfMessage( 'viewsource' ) );
 574                 $wgOut->setSubtitle(
 575                         wfMessage( 'viewsourcefor', Linker::linkKnown( $this->mTitle ) )->text()
 576                 );
 577                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 578                 $wgOut->addHTML( "<hr />\n" );
 579
 580                 # If the user made changes, preserve them when showing the markup
 581                 # (This happens when a user is blocked during edit, for instance)
 582                 if ( !$this->firsttime ) {
 583                         $content = $this->textbox1;
 584                         $wgOut->addWikiMsg( 'viewyourtext' );
 585                 } else {
 586                         $wgOut->addWikiMsg( 'viewsourcetext' );
 587                 }
 588
 589                 $this->showTextbox( $content, 'wpTextbox1', array( 'readonly' ) );
 590
 591                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 592                         Linker::formatTemplates( $this->getTemplates() ) ) );
 593
 594                 if ( $this->mTitle->exists() ) {
 595                         $wgOut->returnToMain( null, $this->mTitle );
 596                 }
 597         }
 598
 599         /**
 600          * Show a read-only error
 601          * Parameters are the same as OutputPage:readOnlyPage()
 602          * Redirect to the article page if redlink=1
 603          * @deprecated in 1.19; use displayPermissionsError() instead
 604          */
 605         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 606                 global $wgRequest, $wgOut;
 607                 if ( $wgRequest->getBool( 'redlink' ) ) {
 608                         // The edit page was reached via a red link.
 609                         // Redirect to the article page and let them click the edit tab if
 610                         // they really want a permission error.
 611                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 612                 } else {
 613                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 614                 }
 615         }
 616
 617         /**
 618          * Should we show a preview when the edit form is first shown?
 619          *
 620          * @return bool
 621          */
 622         protected function previewOnOpen() {
 623                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 624                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 625                         // Explicit override from request
 626                         return true;
 627                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 628                         // Explicit override from request
 629                         return false;
 630                 } elseif ( $this->section == 'new' ) {
 631                         // Nothing *to* preview for new sections
 632                         return false;
 633                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 634                         // Standard preference behaviour
 635                         return true;
 636                 } elseif ( !$this->mTitle->exists() &&
 637                   isset($wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]) &&
 638                   $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 639                 {
 640                         // Categories are special
 641                         return true;
 642                 } else {
 643                         return false;
 644                 }
 645         }
 646
 647         /**
 648          * Does this EditPage class support section editing?
 649          * This is used by EditPage subclasses to indicate their ui cannot handle section edits
 650          *
 651          * @return bool
 652          */
 653         protected function isSectionEditSupported() {
 654                 return true;
 655         }
 656
 657         /**
 658          * Returns the URL to use in the form's action attribute.
 659          * This is used by EditPage subclasses when simply customizing the action
 660          * variable in the constructor is not enough. This can be used when the
 661          * EditPage lives inside of a Special page rather than a custom page action.
 662          *
 663          * @param $title Title object for which is being edited (where we go to for &action= links)
 664          * @return string
 665          */
 666         protected function getActionURL( Title $title ) {
 667                 return $title->getLocalURL( array( 'action' => $this->action ) );
 668         }
 669
 670         /**
 671          * @todo document
 672          * @param $request WebRequest
 673          */
 674         function importFormData( &$request ) {
 675                 global $wgLang, $wgUser;
 676
 677                 wfProfileIn( __METHOD__ );
 678
 679                 # Section edit can come from either the form or a link
 680                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 681
 682                 if ( $request->wasPosted() ) {
 683                         # These fields need to be checked for encoding.
 684                         # Also remove trailing whitespace, but don't remove _initial_
 685                         # whitespace from the text boxes. This may be significant formatting.
 686                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 687                         if ( !$request->getCheck('wpTextbox2') ) {
 688                                 // Skip this if wpTextbox2 has input, it indicates that we came
 689                                 // from a conflict page with raw page text, not a custom form
 690                                 // modified by subclasses
 691                                 wfProfileIn( get_class($this)."::importContentFormData" );
 692                                 $textbox1 = $this->importContentFormData( $request );
 693                                 if ( isset($textbox1) )
 694                                         $this->textbox1 = $textbox1;
 695                                 wfProfileOut( get_class($this)."::importContentFormData" );
 696                         }
 697
 698                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 699                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary' ), 250 );
 700
 701                         # Remove extra headings from summaries and new sections.
 702                         $this->summary = preg_replace('/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary);
 703
 704                         $this->edittime = $request->getVal( 'wpEdittime' );
 705                         $this->starttime = $request->getVal( 'wpStarttime' );
 706
 707                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 708
 709                         if ($this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null) {
 710                                 // wpTextbox1 field is missing, possibly due to being "too big"
 711                                 // according to some filter rules such as Suhosin's setting for
 712                                 // suhosin.request.max_value_length (d'oh)
 713                                 $this->incompleteForm = true;
 714                         } else {
 715                                 // edittime should be one of our last fields; if it's missing,
 716                                 // the submission probably broke somewhere in the middle.
 717                                 $this->incompleteForm = is_null( $this->edittime );
 718                         }
 719                         if ( $this->incompleteForm ) {
 720                                 # If the form is incomplete, force to preview.
 721                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 722                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 723                                 $this->preview = true;
 724                         } else {
 725                                 /* Fallback for live preview */
 726                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 727                                 $this->diff = $request->getCheck( 'wpDiff' );
 728
 729                                 // Remember whether a save was requested, so we can indicate
 730                                 // if we forced preview due to session failure.
 731                                 $this->mTriedSave = !$this->preview;
 732
 733                                 if ( $this->tokenOk( $request ) ) {
 734                                         # Some browsers will not report any submit button
 735                                         # if the user hits enter in the comment box.
 736                                         # The unmarked state will be assumed to be a save,
 737                                         # if the form seems otherwise complete.
 738                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 739                                 } elseif ( $this->diff ) {
 740                                         # Failed token check, but only requested "Show Changes".
 741                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 742                                 } else {
 743                                         # Page might be a hack attempt posted from
 744                                         # an external site. Preview instead of saving.
 745                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 746                                         $this->preview = true;
 747                                 }
 748                         }
 749                         $this->save = !$this->preview && !$this->diff;
 750                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 751                                 $this->edittime = null;
 752                         }
 753
 754                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 755                                 $this->starttime = null;
 756                         }
 757
 758                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 759
 760                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 761                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 762
 763                         # Don't force edit summaries when a user is editing their own user or talk page
 764                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 765                                 $this->mTitle->getText() == $wgUser->getName() )
 766                         {
 767                                 $this->allowBlankSummary = true;
 768                         } else {
 769                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary');
 770                         }
 771
 772                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 773                 } else {
 774                         # Not a posted form? Start with nothing.
 775                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 776                         $this->textbox1  = '';
 777                         $this->summary   = '';
 778                         $this->edittime  = '';
 779                         $this->starttime = wfTimestampNow();
 780                         $this->edit      = false;
 781                         $this->preview   = false;
 782                         $this->save      = false;
 783                         $this->diff      = false;
 784                         $this->minoredit = false;
 785                         $this->watchthis = $request->getBool( 'watchthis', false ); // Watch may be overriden by request parameters
 786                         $this->recreate  = false;
 787
 788                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 789                                 $this->summary = $request->getVal( 'preloadtitle' );
 790                         }
 791                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 792                                 $this->summary = $request->getText( 'summary' );
 793                         }
 794
 795                         if ( $request->getVal( 'minor' ) ) {
 796                                 $this->minoredit = true;
 797                         }
 798                 }
 799
 800                 $this->bot = $request->getBool( 'bot', true );
 801                 $this->nosummary = $request->getBool( 'nosummary' );
 802
 803                 // @todo FIXME: Unused variable?
 804                 $this->oldid = $request->getInt( 'oldid' );
 805
 806                 $this->live = $request->getCheck( 'live' );
 807                 $this->editintro = $request->getText( 'editintro',
 808                         // Custom edit intro for new sections
 809                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 810
 811                 // Allow extensions to modify form data
 812                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 813
 814                 wfProfileOut( __METHOD__ );
 815         }
 816
 817         /**
 818          * Subpage overridable method for extracting the page content data from the
 819          * posted form to be placed in $this->textbox1, if using customized input
 820          * this method should be overrided and return the page text that will be used
 821          * for saving, preview parsing and so on...
 822          *
 823          * @param $request WebRequest
 824          */
 825         protected function importContentFormData( &$request ) {
 826                 return; // Don't do anything, EditPage already extracted wpTextbox1
 827         }
 828
 829         /**
 830          * Make sure the form isn't faking a user's credentials.
 831          *
 832          * @param $request WebRequest
 833          * @return bool
 834          * @private
 835          */
 836         function tokenOk( &$request ) {
 837                 global $wgUser;
 838                 $token = $request->getVal( 'wpEditToken' );
 839                 $this->mTokenOk = $wgUser->matchEditToken( $token );
 840                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
 841                 return $this->mTokenOk;
 842         }
 843
 844         /**
 845          * Show all applicable editing introductions
 846          */
 847         protected function showIntro() {
 848                 global $wgOut, $wgUser;
 849                 if ( $this->suppressIntro ) {
 850                         return;
 851                 }
 852
 853                 $namespace = $this->mTitle->getNamespace();
 854
 855                 if ( $namespace == NS_MEDIAWIKI ) {
 856                         # Show a warning if editing an interface message
 857                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
 858                 }
 859
 860                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
 861                 # Show log extract when the user is currently blocked
 862                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
 863                         $parts = explode( '/', $this->mTitle->getText(), 2 );
 864                         $username = $parts[0];
 865                         $user = User::newFromName( $username, false /* allow IP users*/ );
 866                         $ip = User::isIP( $username );
 867                         if ( !$user->isLoggedIn() && !$ip ) { # User does not exist
 868                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
 869                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
 870                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
 871                                 LogEventsList::showLogExtract(
 872                                         $wgOut,
 873                                         'block',
 874                                         $user->getUserPage(),
 875                                         '',
 876                                         array(
 877                                                 'lim' => 1,
 878                                                 'showIfEmpty' => false,
 879                                                 'msgKey' => array(
 880                                                         'blocked-notice-logextract',
 881                                                         $user->getName() # Support GENDER in notice
 882                                                 )
 883                                         )
 884                                 );
 885                         }
 886                 }
 887                 # Try to add a custom edit intro, or use the standard one if this is not possible.
 888                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
 889                         if ( $wgUser->isLoggedIn() ) {
 890                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1\n</div>", 'newarticletext' );
 891                         } else {
 892                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1\n</div>", 'newarticletextanon' );
 893                         }
 894                 }
 895                 # Give a notice if the user is editing a deleted/moved page...
 896                 if ( !$this->mTitle->exists() ) {
 897                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
 898                                 '', array( 'lim' => 10,
 899                                            'conds' => array( "log_action != 'revision'" ),
 900                                            'showIfEmpty' => false,
 901                                            'msgKey' => array( 'recreate-moveddeleted-warn') )
 902                         );
 903                 }
 904         }
 905
 906         /**
 907          * Attempt to show a custom editing introduction, if supplied
 908          *
 909          * @return bool
 910          */
 911         protected function showCustomIntro() {
 912                 if ( $this->editintro ) {
 913                         $title = Title::newFromText( $this->editintro );
 914                         if ( $title instanceof Title && $title->exists() && $title->userCanRead() ) {
 915                                 global $wgOut;
 916                                 // Added using template syntax, to take <noinclude>'s into account.
 917                                 $wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
 918                                 return true;
 919                         } else {
 920                                 return false;
 921                         }
 922                 } else {
 923                         return false;
 924                 }
 925         }
 926
 927         /**
 928          * Attempt submission (no UI)
 929          *
 930          * @param $result
 931          * @param $bot bool
 932          *
 933          * @return Status object, possibly with a message, but always with one of the AS_* constants in $status->value,
 934          *
 935          * FIXME: This interface is TERRIBLE, but hard to get rid of due to various error display idiosyncrasies. There are
 936          * also lots of cases where error metadata is set in the object and retrieved later instead of being returned, e.g.
 937          * AS_CONTENT_TOO_BIG and AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some time.
 938          */
 939         function internalAttemptSave( &$result, $bot = false ) {
 940                 global $wgFilterCallback, $wgUser, $wgRequest, $wgParser;
 941                 global $wgMaxArticleSize;
 942
 943                 $status = Status::newGood();
 944
 945                 wfProfileIn( __METHOD__  );
 946                 wfProfileIn( __METHOD__ . '-checks' );
 947
 948                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
 949                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
 950                         $status->fatal( 'hookaborted' );
 951                         $status->value = self::AS_HOOK_ERROR;
 952                         wfProfileOut( __METHOD__ . '-checks' );
 953                         wfProfileOut( __METHOD__  );
 954                         return $status;
 955                 }
 956
 957                 # Check image redirect
 958                 if ( $this->mTitle->getNamespace() == NS_FILE &&
 959                         Title::newFromRedirect( $this->textbox1 ) instanceof Title &&
 960                         !$wgUser->isAllowed( 'upload' ) ) {
 961                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
 962                                 $status->setResult( false, $code );
 963
 964                                 wfProfileOut( __METHOD__ . '-checks' );
 965                                 wfProfileOut( __METHOD__  );
 966
 967                                 return $status;
 968                 }
 969
 970                 # Check for spam
 971                 $match = self::matchSummarySpamRegex( $this->summary );
 972                 if ( $match === false ) {
 973                         $match = self::matchSpamRegex( $this->textbox1 );
 974                 }
 975                 if ( $match !== false ) {
 976                         $result['spam'] = $match;
 977                         $ip = $wgRequest->getIP();
 978                         $pdbk = $this->mTitle->getPrefixedDBkey();
 979                         $match = str_replace( "\n", '', $match );
 980                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
 981                         $status->fatal( 'spamprotectionmatch', $match );
 982                         $status->value = self::AS_SPAM_ERROR;
 983                         wfProfileOut( __METHOD__ . '-checks' );
 984                         wfProfileOut( __METHOD__ );
 985                         return $status;
 986                 }
 987                 if ( $wgFilterCallback && is_callable( $wgFilterCallback ) && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
 988                         # Error messages or other handling should be performed by the filter function
 989                         $status->setResult( false, self::AS_FILTERING );
 990                         wfProfileOut( __METHOD__ . '-checks' );
 991                         wfProfileOut( __METHOD__ );
 992                         return $status;
 993                 }
 994                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
 995                         # Error messages etc. could be handled within the hook...
 996                         $status->fatal( 'hookaborted' );
 997                         $status->value = self::AS_HOOK_ERROR;
 998                         wfProfileOut( __METHOD__ . '-checks' );
 999                         wfProfileOut( __METHOD__ );
1000                         return $status;
1001                 } elseif ( $this->hookError != '' ) {
1002                         # ...or the hook could be expecting us to produce an error
1003                         $status->fatal( 'hookaborted' );
1004                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
1005                         wfProfileOut( __METHOD__ . '-checks' );
1006                         wfProfileOut( __METHOD__ );
1007                         return $status;
1008                 }
1009
1010                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1011                         // Auto-block user's IP if the account was "hard" blocked
1012                         $wgUser->spreadAnyEditBlock();
1013                         # Check block state against master, thus 'false'.
1014                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1015                         wfProfileOut( __METHOD__ . '-checks' );
1016                         wfProfileOut( __METHOD__ );
1017                         return $status;
1018                 }
1019
1020                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1021                 if ( $this->kblength > $wgMaxArticleSize ) {
1022                         // Error will be displayed by showEditForm()
1023                         $this->tooBig = true;
1024                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1025                         wfProfileOut( __METHOD__ . '-checks' );
1026                         wfProfileOut( __METHOD__ );
1027                         return $status;
1028                 }
1029
1030                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1031                         if ( $wgUser->isAnon() ) {
1032                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1033                                 wfProfileOut( __METHOD__ . '-checks' );
1034                                 wfProfileOut( __METHOD__ );
1035                                 return $status;
1036                         } else {
1037                                 $status->fatal( 'readonlytext' );
1038                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1039                                 wfProfileOut( __METHOD__ . '-checks' );
1040                                 wfProfileOut( __METHOD__ );
1041                                 return $status;
1042                         }
1043                 }
1044
1045                 if ( wfReadOnly() ) {
1046                         $status->fatal( 'readonlytext' );
1047                         $status->value = self::AS_READ_ONLY_PAGE;
1048                         wfProfileOut( __METHOD__ . '-checks' );
1049                         wfProfileOut( __METHOD__ );
1050                         return $status;
1051                 }
1052                 if ( $wgUser->pingLimiter() ) {
1053                         $status->fatal( 'actionthrottledtext' );
1054                         $status->value = self::AS_RATE_LIMITED;
1055                         wfProfileOut( __METHOD__ . '-checks' );
1056                         wfProfileOut( __METHOD__ );
1057                         return $status;
1058                 }
1059
1060                 # If the article has been deleted while editing, don't save it without
1061                 # confirmation
1062                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1063                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1064                         wfProfileOut( __METHOD__ . '-checks' );
1065                         wfProfileOut( __METHOD__ );
1066                         return $status;
1067                 }
1068
1069                 wfProfileOut( __METHOD__ . '-checks' );
1070
1071                 # If article is new, insert it.
1072                 $aid = $this->mTitle->getArticleID( Title::GAID_FOR_UPDATE );
1073                 $new = ( $aid == 0 );
1074
1075                 if ( $new ) {
1076                         // Late check for create permission, just in case *PARANOIA*
1077                         if ( !$this->mTitle->userCan( 'create' ) ) {
1078                                 $status->fatal( 'nocreatetext' );
1079                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1080                                 wfDebug( __METHOD__ . ": no create permission\n" );
1081                                 wfProfileOut( __METHOD__ );
1082                                 return $status;
1083                         }
1084
1085                         # Don't save a new article if it's blank.
1086                         if ( $this->textbox1 == '' ) {
1087                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1088                                 wfProfileOut( __METHOD__ );
1089                                 return $status;
1090                         }
1091
1092                         // Run post-section-merge edit filter
1093                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
1094                                 # Error messages etc. could be handled within the hook...
1095                                 $status->fatal( 'hookaborted' );
1096                                 $status->value = self::AS_HOOK_ERROR;
1097                                 wfProfileOut( __METHOD__ );
1098                                 return $status;
1099                         } elseif ( $this->hookError != '' ) {
1100                                 # ...or the hook could be expecting us to produce an error
1101                                 $status->fatal( 'hookaborted' );
1102                                 $status->value = self::AS_HOOK_ERROR_EXPECTED;
1103                                 wfProfileOut( __METHOD__ );
1104                                 return $status;
1105                         }
1106
1107                         # Handle the user preference to force summaries here. Check if it's not a redirect.
1108                         if ( !$this->allowBlankSummary && !Title::newFromRedirect( $this->textbox1 ) ) {
1109                                 if ( md5( $this->summary ) == $this->autoSumm ) {
1110                                         $this->missingSummary = true;
1111                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1112                                         $status->value = self::AS_SUMMARY_NEEDED;
1113                                         wfProfileOut( __METHOD__ );
1114                                         return $status;
1115                                 }
1116                         }
1117
1118                         $text = $this->textbox1;
1119                         if ( $this->section == 'new' && $this->summary != '' ) {
1120                                 $text = wfMsgForContent( 'newsectionheaderdefaultlevel', $this->summary ) . "\n\n" . $text;
1121                         }
1122
1123                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1124
1125                 } else {
1126
1127                         # Article exists. Check for edit conflict.
1128
1129                         $this->mArticle->clear(); # Force reload of dates, etc.
1130
1131                         wfDebug( "timestamp: {$this->mArticle->getTimestamp()}, edittime: {$this->edittime}\n" );
1132
1133                         if ( $this->mArticle->getTimestamp() != $this->edittime ) {
1134                                 $this->isConflict = true;
1135                                 if ( $this->section == 'new' ) {
1136                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1137                                                 $this->mArticle->getComment() == $this->summary ) {
1138                                                 // Probably a duplicate submission of a new comment.
1139                                                 // This can happen when squid resends a request after
1140                                                 // a timeout but the first one actually went through.
1141                                                 wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
1142                                         } else {
1143                                                 // New comment; suppress conflict.
1144                                                 $this->isConflict = false;
1145                                                 wfDebug( __METHOD__ .": conflict suppressed; new section\n" );
1146                                         }
1147                                 } elseif ( $this->section == '' && $this->userWasLastToEdit( $wgUser->getId(), $this->edittime ) ) {
1148                                         # Suppress edit conflict with self, except for section edits where merging is required.
1149                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1150                                         $this->isConflict = false;
1151                                 }
1152                         }
1153
1154                         if ( $this->isConflict ) {
1155                                 wfDebug( __METHOD__ . ": conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
1156                                         $this->mArticle->getTimestamp() . "')\n" );
1157                                 $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime );
1158                         } else {
1159                                 wfDebug( __METHOD__ . ": getting section '$this->section'\n" );
1160                                 $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary );
1161                         }
1162                         if ( is_null( $text ) ) {
1163                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1164                                 $this->isConflict = true;
1165                                 $text = $this->textbox1; // do not try to merge here!
1166                         } elseif ( $this->isConflict ) {
1167                                 # Attempt merge
1168                                 if ( $this->mergeChangesInto( $text ) ) {
1169                                         // Successful merge! Maybe we should tell the user the good news?
1170                                         $this->isConflict = false;
1171                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1172                                 } else {
1173                                         $this->section = '';
1174                                         $this->textbox1 = $text;
1175                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1176                                 }
1177                         }
1178
1179                         if ( $this->isConflict ) {
1180                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1181                                 wfProfileOut( __METHOD__ );
1182                                 return $status;
1183                         }
1184
1185                         // Run post-section-merge edit filter
1186                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$this->hookError, $this->summary ) ) ) {
1187                                 # Error messages etc. could be handled within the hook...
1188                                 $status->fatal( 'hookaborted' );
1189                                 $status->value = self::AS_HOOK_ERROR;
1190                                 wfProfileOut( __METHOD__ );
1191                                 return $status;
1192                         } elseif ( $this->hookError != '' ) {
1193                                 # ...or the hook could be expecting us to produce an error
1194                                 $status->fatal( 'hookaborted' );
1195                                 $status->value = self::AS_HOOK_ERROR_EXPECTED;
1196                                 wfProfileOut( __METHOD__ );
1197                                 return $status;
1198                         }
1199
1200                         # Handle the user preference to force summaries here, but not for null edits
1201                         if ( $this->section != 'new' && !$this->allowBlankSummary
1202                                 && 0 != strcmp( $this->mArticle->getContent(), $text )
1203                                 && !Title::newFromRedirect( $text ) ) # check if it's not a redirect
1204                         {
1205                                 if ( md5( $this->summary ) == $this->autoSumm ) {
1206                                         $this->missingSummary = true;
1207                                         $status->fatal( 'missingsummary' );
1208                                         $status->value = self::AS_SUMMARY_NEEDED;
1209                                         wfProfileOut( __METHOD__ );
1210                                         return $status;
1211                                 }
1212                         }
1213
1214                         # And a similar thing for new sections
1215                         if ( $this->section == 'new' && !$this->allowBlankSummary ) {
1216                                 if ( trim( $this->summary ) == '' ) {
1217                                         $this->missingSummary = true;
1218                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1219                                         $status->value = self::AS_SUMMARY_NEEDED;
1220                                         wfProfileOut( __METHOD__ );
1221                                         return $status;
1222                                 }
1223                         }
1224
1225                         # All's well
1226                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1227                         $sectionanchor = '';
1228                         if ( $this->section == 'new' ) {
1229                                 if ( $this->textbox1 == '' ) {
1230                                         $this->missingComment = true;
1231                                         $status->fatal( 'missingcommenttext' );
1232                                         $status->value = self::AS_TEXTBOX_EMPTY;
1233                                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1234                                         wfProfileOut( __METHOD__ );
1235                                         return $status;
1236                                 }
1237                                 if ( $this->summary != '' ) {
1238                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1239                                         # This is a new section, so create a link to the new section
1240                                         # in the revision summary.
1241                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1242                                         $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1243                                 }
1244                         } elseif ( $this->section != '' ) {
1245                                 # Try to get a section anchor from the section source, redirect to edited section if header found
1246                                 # XXX: might be better to integrate this into Article::replaceSection
1247                                 # for duplicate heading checking and maybe parsing
1248                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1249                                 # we can't deal with anchors, includes, html etc in the header for now,
1250                                 # headline would need to be parsed to improve this
1251                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1252                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1253                                 }
1254                         }
1255                         $result['sectionanchor'] = $sectionanchor;
1256                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1257
1258                         // Save errors may fall down to the edit form, but we've now
1259                         // merged the section into full text. Clear the section field
1260                         // so that later submission of conflict forms won't try to
1261                         // replace that into a duplicated mess.
1262                         $this->textbox1 = $text;
1263                         $this->section = '';
1264
1265                         $status->value = self::AS_SUCCESS_UPDATE;
1266                 }
1267
1268                 // Check for length errors again now that the section is merged in
1269                 $this->kblength = (int)( strlen( $text ) / 1024 );
1270                 if ( $this->kblength > $wgMaxArticleSize ) {
1271                         $this->tooBig = true;
1272                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1273                         wfProfileOut( __METHOD__ );
1274                         return $status;
1275                 }
1276
1277                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1278                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1279                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1280                         ( $bot ? EDIT_FORCE_BOT : 0 );
1281
1282                 $doEditStatus = $this->mArticle->doEdit( $text, $this->summary, $flags );
1283
1284                 if ( $doEditStatus->isOK() ) {
1285                         $result['redirect'] = Title::newFromRedirect( $text ) !== null;
1286                         $this->commitWatch();
1287                         wfProfileOut( __METHOD__ );
1288                         return $status;
1289                 } else {
1290                         $this->isConflict = true;
1291                         $doEditStatus->value = self::AS_END; // Destroys data doEdit() put in $status->value but who cares
1292                         wfProfileOut( __METHOD__ );
1293                         return $doEditStatus;
1294                 }
1295         }
1296
1297         /**
1298          * Commit the change of watch status
1299          */
1300         protected function commitWatch() {
1301                 global $wgUser;
1302                 if ( $this->watchthis xor $this->mTitle->userIsWatching() ) {
1303                         $dbw = wfGetDB( DB_MASTER );
1304                         $dbw->begin();
1305                         if ( $this->watchthis ) {
1306                                 WatchAction::doWatch( $this->mTitle, $wgUser );
1307                         } else {
1308                                 WatchAction::doUnwatch( $this->mTitle, $wgUser );
1309                         }
1310                         $dbw->commit();
1311                 }
1312         }
1313
1314         /**
1315          * Check if no edits were made by other users since
1316          * the time a user started editing the page. Limit to
1317          * 50 revisions for the sake of performance.
1318          *
1319          * @param $id int
1320          * @param $edittime string
1321          *
1322          * @return bool
1323          */
1324         protected function userWasLastToEdit( $id, $edittime ) {
1325                 if( !$id ) return false;
1326                 $dbw = wfGetDB( DB_MASTER );
1327                 $res = $dbw->select( 'revision',
1328                         'rev_user',
1329                         array(
1330                                 'rev_page' => $this->mArticle->getId(),
1331                                 'rev_timestamp > '.$dbw->addQuotes( $dbw->timestamp($edittime) )
1332                         ),
1333                         __METHOD__,
1334                         array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
1335                 foreach ( $res as $row ) {
1336                         if( $row->rev_user != $id ) {
1337                                 return false;
1338                         }
1339                 }
1340                 return true;
1341         }
1342
1343         /**
1344          * Check given input text against $wgSpamRegex, and return the text of the first match.
1345          *
1346          * @param $text string
1347          *
1348          * @return string|false matching string or false
1349          */
1350         public static function matchSpamRegex( $text ) {
1351                 global $wgSpamRegex;
1352                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1353                 $regexes = (array)$wgSpamRegex;
1354                 return self::matchSpamRegexInternal( $text, $regexes );
1355         }
1356
1357         /**
1358          * Check given input text against $wgSpamRegex, and return the text of the first match.
1359          *
1360          * @parma $text string
1361          *
1362          * @return string|false  matching string or false
1363          */
1364         public static function matchSummarySpamRegex( $text ) {
1365                 global $wgSummarySpamRegex;
1366                 $regexes = (array)$wgSummarySpamRegex;
1367                 return self::matchSpamRegexInternal( $text, $regexes );
1368         }
1369
1370         /**
1371          * @param $text string
1372          * @param $regexes array
1373          * @return bool|string
1374          */
1375         protected static function matchSpamRegexInternal( $text, $regexes ) {
1376                 foreach( $regexes as $regex ) {
1377                         $matches = array();
1378                         if( preg_match( $regex, $text, $matches ) ) {
1379                                 return $matches[0];
1380                         }
1381                 }
1382                 return false;
1383         }
1384
1385         /**
1386          * Initialise form fields in the object
1387          * Called on the first invocation, e.g. when a user clicks an edit link
1388          * @return bool -- if the requested section is valid
1389          */
1390         function initialiseForm() {
1391                 global $wgUser;
1392                 $this->edittime = $this->mArticle->getTimestamp();
1393                 $this->textbox1 = $this->getContent( false );
1394                 // activate checkboxes if user wants them to be always active
1395                 # Sort out the "watch" checkbox
1396                 if ( $wgUser->getOption( 'watchdefault' ) ) {
1397                         # Watch all edits
1398                         $this->watchthis = true;
1399                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1400                         # Watch creations
1401                         $this->watchthis = true;
1402                 } elseif ( $this->mTitle->userIsWatching() ) {
1403                         # Already watched
1404                         $this->watchthis = true;
1405                 }
1406                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
1407                         $this->minoredit = true;
1408                 }
1409                 if ( $this->textbox1 === false ) {
1410                         return false;
1411                 }
1412                 wfProxyCheck();
1413                 return true;
1414         }
1415
1416         function setHeaders() {
1417                 global $wgOut;
1418                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1419                 if ( $this->isConflict ) {
1420                         $wgOut->setPageTitle( wfMessage( 'editconflict', $this->getContextTitle()->getPrefixedText() ) );
1421                 } elseif ( $this->section != '' ) {
1422                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1423                         $wgOut->setPageTitle( wfMessage( $msg, $this->getContextTitle()->getPrefixedText() ) );
1424                 } else {
1425                         # Use the title defined by DISPLAYTITLE magic word when present
1426                         if ( isset( $this->mParserOutput )
1427                          && ( $dt = $this->mParserOutput->getDisplayTitle() ) !== false ) {
1428                                 $title = $dt;
1429                         } else {
1430                                 $title = $this->getContextTitle()->getPrefixedText();
1431                         }
1432                         $wgOut->setPageTitle( wfMessage( 'editing', $title ) );
1433                 }
1434         }
1435
1436         /**
1437          * Send the edit form and related headers to $wgOut
1438          * @param $formCallback Callback that takes an OutputPage parameter; will be called
1439          *     during form output near the top, for captchas and the like.
1440          */
1441         function showEditForm( $formCallback = null ) {
1442                 global $wgOut, $wgUser;
1443
1444                 wfProfileIn( __METHOD__ );
1445
1446                 #need to parse the preview early so that we know which templates are used,
1447                 #otherwise users with "show preview after edit box" will get a blank list
1448                 #we parse this near the beginning so that setHeaders can do the title
1449                 #setting work instead of leaving it in getPreviewText
1450                 $previewOutput = '';
1451                 if ( $this->formtype == 'preview' ) {
1452                         $previewOutput = $this->getPreviewText();
1453                 }
1454
1455                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) );
1456
1457                 $this->setHeaders();
1458
1459                 # Enabled article-related sidebar, toplinks, etc.
1460                 $wgOut->setArticleRelated( true );
1461
1462                 if ( $this->showHeader() === false ) {
1463                         wfProfileOut( __METHOD__ );
1464                         return;
1465                 }
1466
1467                 $action = htmlspecialchars( $this->getActionURL( $this->getContextTitle() ) );
1468
1469                 if ( $wgUser->getOption( 'showtoolbar' ) and !$this->isCssJsSubpage ) {
1470                         # prepare toolbar for edit buttons
1471                         $toolbar = EditPage::getEditToolbar();
1472                 } else {
1473                         $toolbar = '';
1474                 }
1475
1476
1477                 $wgOut->addHTML( $this->editFormPageTop );
1478
1479                 if ( $wgUser->getOption( 'previewontop' ) ) {
1480                         $this->displayPreviewArea( $previewOutput, true );
1481                 }
1482
1483                 $wgOut->addHTML( $this->editFormTextTop );
1484
1485                 $templates = $this->getTemplates();
1486                 $formattedtemplates = Linker::formatTemplates( $templates, $this->preview, $this->section != '');
1487
1488                 $hiddencats = $this->mArticle->getHiddenCategories();
1489                 $formattedhiddencats = Linker::formatHiddenCategories( $hiddencats );
1490
1491                 if ( $this->wasDeletedSinceLastEdit() && 'save' != $this->formtype ) {
1492                         $wgOut->wrapWikiMsg(
1493                                 "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
1494                                 'deletedwhileediting' );
1495                 } elseif ( $this->wasDeletedSinceLastEdit() ) {
1496                         // Hide the toolbar and edit area, user can click preview to get it back
1497                         // Add an confirmation checkbox and explanation.
1498                         $toolbar = '';
1499                         // @todo move this to a cleaner conditional instead of blanking a variable
1500                 }
1501                 $wgOut->addHTML( <<<HTML
1502 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1503 HTML
1504 );
1505
1506                 if ( is_callable( $formCallback ) ) {
1507                         call_user_func_array( $formCallback, array( &$wgOut ) );
1508                 }
1509
1510                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1511
1512                 // Put these up at the top to ensure they aren't lost on early form submission
1513                 $this->showFormBeforeText();
1514
1515                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
1516                         $username = $this->lastDelete->user_name;
1517                         $comment = $this->lastDelete->log_comment;
1518
1519                         // It is better to not parse the comment at all than to have templates expanded in the middle
1520                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
1521                         $key = $comment === ''
1522                                 ? 'confirmrecreate-noreason'
1523                                 : 'confirmrecreate';
1524                         $wgOut->addHTML(
1525                                 '<div class="mw-confirm-recreate">' .
1526                                 wfMsgExt( $key, 'parseinline', $username, "<nowiki>$comment</nowiki>" ) .
1527                                 Xml::checkLabel( wfMsg( 'recreate' ), 'wpRecreate', 'wpRecreate', false,
1528                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
1529                                 ) .
1530                                 '</div>'
1531                         );
1532                 }
1533
1534                 # If a blank edit summary was previously provided, and the appropriate
1535                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1536                 # user being bounced back more than once in the event that a summary
1537                 # is not required.
1538                 #####
1539                 # For a bit more sophisticated detection of blank summaries, hash the
1540                 # automatic one and pass that in the hidden field wpAutoSummary.
1541                 if ( $this->missingSummary ||
1542                         ( $this->section == 'new' && $this->nosummary ) )
1543                                 $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
1544                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1545                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
1546
1547                 $wgOut->addHTML( Html::hidden( 'oldid', $this->mArticle->getOldID() ) );
1548
1549                 if ( $this->section == 'new' ) {
1550                         $this->showSummaryInput( true, $this->summary );
1551                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
1552                 }
1553
1554                 $wgOut->addHTML( $this->editFormTextBeforeContent );
1555
1556                 $wgOut->addHTML( $toolbar );
1557
1558                 if ( $this->isConflict ) {
1559                         // In an edit conflict bypass the overrideable content form method
1560                         // and fallback to the raw wpTextbox1 since editconflicts can't be
1561                         // resolved between page source edits and custom ui edits using the
1562                         // custom edit ui.
1563                         $this->showTextbox1( null, $this->getContent() );
1564                 } else {
1565                         $this->showContentForm();
1566                 }
1567
1568                 $wgOut->addHTML( $this->editFormTextAfterContent );
1569
1570                 $wgOut->addWikiText( $this->getCopywarn() );
1571                 if ( isset($this->editFormTextAfterWarn) && $this->editFormTextAfterWarn !== '' )
1572                         $wgOut->addHTML( $this->editFormTextAfterWarn );
1573
1574                 $this->showStandardInputs();
1575
1576                 $this->showFormAfterText();
1577
1578                 $this->showTosSummary();
1579                 $this->showEditTools();
1580
1581                 $wgOut->addHTML( <<<HTML
1582 {$this->editFormTextAfterTools}
1583 <div class='templatesUsed'>
1584 {$formattedtemplates}
1585 </div>
1586 <div class='hiddencats'>
1587 {$formattedhiddencats}
1588 </div>
1589 HTML
1590 );
1591
1592                 if ( $this->isConflict )
1593                         $this->showConflict();
1594
1595                 $wgOut->addHTML( $this->editFormTextBottom );
1596                 $wgOut->addHTML( "</form>\n" );
1597                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1598                         $this->displayPreviewArea( $previewOutput, false );
1599                 }
1600
1601                 wfProfileOut( __METHOD__ );
1602         }
1603
1604         protected function showHeader() {
1605                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
1606                 if ( $this->isConflict ) {
1607                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
1608                         $this->edittime = $this->mArticle->getTimestamp();
1609                 } else {
1610                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
1611                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
1612                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
1613                                 // Someone is welcome to try refactoring though
1614                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
1615                                 return false;
1616                         }
1617
1618                         if ( $this->section != '' && $this->section != 'new' ) {
1619                                 $matches = array();
1620                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
1621                                         preg_match( "/^(=+)(.+)\\1/mi", $this->textbox1, $matches );
1622                                         if ( !empty( $matches[2] ) ) {
1623                                                 global $wgParser;
1624                                                 $this->summary = "/* " .
1625                                                         $wgParser->stripSectionName(trim($matches[2])) .
1626                                                         " */ ";
1627                                         }
1628                                 }
1629                         }
1630
1631                         if ( $this->missingComment ) {
1632                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
1633                         }
1634
1635                         if ( $this->missingSummary && $this->section != 'new' ) {
1636                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
1637                         }
1638
1639                         if ( $this->missingSummary && $this->section == 'new' ) {
1640                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
1641                         }
1642
1643                         if ( $this->hookError !== '' ) {
1644                                 $wgOut->addWikiText( $this->hookError );
1645                         }
1646
1647                         if ( !$this->checkUnicodeCompliantBrowser() ) {
1648                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
1649                         }
1650
1651                         if ( isset( $this->mArticle ) && isset( $this->mArticle->mRevision ) ) {
1652                         // Let sysop know that this will make private content public if saved
1653
1654                                 if ( !$this->mArticle->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1655                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
1656                                 } elseif ( $this->mArticle->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1657                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
1658                                 }
1659
1660                                 if ( !$this->mArticle->mRevision->isCurrent() ) {
1661                                         $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
1662                                         $wgOut->addWikiMsg( 'editingold' );
1663                                 }
1664                         }
1665                 }
1666
1667                 if ( wfReadOnly() ) {
1668                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
1669                 } elseif ( $wgUser->isAnon() ) {
1670                         if ( $this->formtype != 'preview' ) {
1671                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
1672                         } else {
1673                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
1674                         }
1675                 } else {
1676                         if ( $this->isCssJsSubpage ) {
1677                                 # Check the skin exists
1678                                 if ( $this->isWrongCaseCssJsPage ) {
1679                                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
1680                                 }
1681                                 if ( $this->formtype !== 'preview' ) {
1682                                         if ( $this->isCssSubpage )
1683                                                 $wgOut->wrapWikiMsg( "<div id='mw-usercssyoucanpreview'>\n$1\n</div>", array( 'usercssyoucanpreview' ) );
1684                                         if ( $this->isJsSubpage )
1685                                                 $wgOut->wrapWikiMsg( "<div id='mw-userjsyoucanpreview'>\n$1\n</div>", array( 'userjsyoucanpreview' ) );
1686                                 }
1687                         }
1688                 }
1689
1690                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
1691                         # Is the title semi-protected?
1692                         if ( $this->mTitle->isSemiProtected() ) {
1693                                 $noticeMsg = 'semiprotectedpagewarning';
1694                         } else {
1695                                 # Then it must be protected based on static groups (regular)
1696                                 $noticeMsg = 'protectedpagewarning';
1697                         }
1698                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
1699                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
1700                 }
1701                 if ( $this->mTitle->isCascadeProtected() ) {
1702                         # Is this page under cascading protection from some source pages?
1703                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
1704                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
1705                         $cascadeSourcesCount = count( $cascadeSources );
1706                         if ( $cascadeSourcesCount > 0 ) {
1707                                 # Explain, and list the titles responsible
1708                                 foreach( $cascadeSources as $page ) {
1709                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
1710                                 }
1711                         }
1712                         $notice .= '</div>';
1713                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
1714                 }
1715                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
1716                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
1717                                 array(  'lim' => 1,
1718                                         'showIfEmpty' => false,
1719                                         'msgKey' => array( 'titleprotectedwarning' ),
1720                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
1721                 }
1722
1723                 if ( $this->kblength === false ) {
1724                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1725                 }
1726
1727                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
1728                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
1729                                 array( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) ) );
1730                 } else {
1731                         if( !wfMessage('longpage-hint')->isDisabled() ) {
1732                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
1733                                         array( 'longpage-hint', $wgLang->formatSize( strlen( $this->textbox1 ) ), strlen( $this->textbox1 ) )
1734                                 );
1735                         }
1736                 }
1737         }
1738
1739         /**
1740          * Standard summary input and label (wgSummary), abstracted so EditPage
1741          * subclasses may reorganize the form.
1742          * Note that you do not need to worry about the label's for=, it will be
1743          * inferred by the id given to the input. You can remove them both by
1744          * passing array( 'id' => false ) to $userInputAttrs.
1745          *
1746          * @param $summary string The value of the summary input
1747          * @param $labelText string The html to place inside the label
1748          * @param $inputAttrs array of attrs to use on the input
1749          * @param $spanLabelAttrs array of attrs to use on the span inside the label
1750          *
1751          * @return array An array in the format array( $label, $input )
1752          */
1753         function getSummaryInput($summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null) {
1754                 //Note: the maxlength is overriden in JS to 250 and to make it use UTF-8 bytes, not characters.
1755                 $inputAttrs = ( is_array($inputAttrs) ? $inputAttrs : array() ) + array(
1756                         'id' => 'wpSummary',
1757                         'maxlength' => '200',
1758                         'tabindex' => '1',
1759                         'size' => 60,
1760                         'spellcheck' => 'true',
1761                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
1762
1763                 $spanLabelAttrs = ( is_array($spanLabelAttrs) ? $spanLabelAttrs : array() ) + array(
1764                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
1765                         'id' => "wpSummaryLabel"
1766                 );
1767
1768                 $label = null;
1769                 if ( $labelText ) {
1770                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
1771                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
1772                 }
1773
1774                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
1775
1776                 return array( $label, $input );
1777         }
1778
1779         /**
1780          * @param $isSubjectPreview Boolean: true if this is the section subject/title
1781          *                          up top, or false if this is the comment summary
1782          *                          down below the textarea
1783          * @param $summary String: The text of the summary to display
1784          * @return String
1785          */
1786         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
1787                 global $wgOut, $wgContLang;
1788                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
1789                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
1790                 if ( $isSubjectPreview ) {
1791                         if ( $this->nosummary ) {
1792                                 return;
1793                         }
1794                 } else {
1795                         if ( !$this->mShowSummaryField ) {
1796                                 return;
1797                         }
1798                 }
1799                 $summary = $wgContLang->recodeForEdit( $summary );
1800                 $labelText = wfMsgExt( $isSubjectPreview ? 'subject' : 'summary', 'parseinline' );
1801                 list($label, $input) = $this->getSummaryInput($summary, $labelText, array( 'class' => $summaryClass ), array());
1802                 $wgOut->addHTML("{$label} {$input}");
1803         }
1804
1805         /**
1806          * @param $isSubjectPreview Boolean: true if this is the section subject/title
1807          *                          up top, or false if this is the comment summary
1808          *                          down below the textarea
1809          * @param $summary String: the text of the summary to display
1810          * @return String
1811          */
1812         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
1813                 if ( !$summary || ( !$this->preview && !$this->diff ) )
1814                         return "";
1815
1816                 global $wgParser;
1817
1818                 if ( $isSubjectPreview )
1819                         $summary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $summary ) );
1820
1821                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
1822
1823                 $summary = wfMsgExt( $message, 'parseinline' ) . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
1824                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
1825         }
1826
1827         protected function showFormBeforeText() {
1828                 global $wgOut;
1829                 $section = htmlspecialchars( $this->section );
1830                 $wgOut->addHTML( <<<HTML
1831 <input type='hidden' value="{$section}" name="wpSection" />
1832 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
1833 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
1834 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
1835
1836 HTML
1837                 );
1838                 if ( !$this->checkUnicodeCompliantBrowser() )
1839                         $wgOut->addHTML(Html::hidden( 'safemode', '1' ));
1840         }
1841
1842         protected function showFormAfterText() {
1843                 global $wgOut, $wgUser;
1844                 /**
1845                  * To make it harder for someone to slip a user a page
1846                  * which submits an edit form to the wiki without their
1847                  * knowledge, a random token is associated with the login
1848                  * session. If it's not passed back with the submission,
1849                  * we won't save the page, or render user JavaScript and
1850                  * CSS previews.
1851                  *
1852                  * For anon editors, who may not have a session, we just
1853                  * include the constant suffix to prevent editing from
1854                  * broken text-mangling proxies.
1855                  */
1856                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->editToken() ) . "\n" );
1857         }
1858
1859         /**
1860          * Subpage overridable method for printing the form for page content editing
1861          * By default this simply outputs wpTextbox1
1862          * Subclasses can override this to provide a custom UI for editing;
1863          * be it a form, or simply wpTextbox1 with a modified content that will be
1864          * reverse modified when extracted from the post data.
1865          * Note that this is basically the inverse for importContentFormData
1866          */
1867         protected function showContentForm() {
1868                 $this->showTextbox1();
1869         }
1870
1871         /**
1872          * Method to output wpTextbox1
1873          * The $textoverride method can be used by subclasses overriding showContentForm
1874          * to pass back to this method.
1875          *
1876          * @param $customAttribs An array of html attributes to use in the textarea
1877          * @param $textoverride String: optional text to override $this->textarea1 with
1878          */
1879         protected function showTextbox1($customAttribs = null, $textoverride = null) {
1880                 $classes = array(); // Textarea CSS
1881                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
1882                         # Is the title semi-protected?
1883                         if ( $this->mTitle->isSemiProtected() ) {
1884                                 $classes[] = 'mw-textarea-sprotected';
1885                         } else {
1886                                 # Then it must be protected based on static groups (regular)
1887                                 $classes[] = 'mw-textarea-protected';
1888                         }
1889                         # Is the title cascade-protected?
1890                         if ( $this->mTitle->isCascadeProtected() ) {
1891                                 $classes[] = 'mw-textarea-cprotected';
1892                         }
1893                 }
1894                 $attribs = array( 'tabindex' => 1 );
1895                 if ( is_array($customAttribs) )
1896                         $attribs += $customAttribs;
1897
1898                 if ( $this->wasDeletedSinceLastEdit() )
1899                         $attribs['type'] = 'hidden';
1900                 if ( !empty( $classes ) ) {
1901                         if ( isset($attribs['class']) )
1902                                 $classes[] = $attribs['class'];
1903                         $attribs['class'] = implode( ' ', $classes );
1904                 }
1905
1906                 $this->showTextbox( isset($textoverride) ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
1907         }
1908
1909         protected function showTextbox2() {
1910                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
1911         }
1912
1913         protected function showTextbox( $content, $name, $customAttribs = array() ) {
1914                 global $wgOut, $wgUser;
1915
1916                 $wikitext = $this->safeUnicodeOutput( $content );
1917                 if ( strval($wikitext) !== '' ) {
1918                         // Ensure there's a newline at the end, otherwise adding lines
1919                         // is awkward.
1920                         // But don't add a newline if the ext is empty, or Firefox in XHTML
1921                         // mode will show an extra newline. A bit annoying.
1922                         $wikitext .= "\n";
1923                 }
1924
1925                 $attribs = $customAttribs + array(
1926                         'accesskey' => ',',
1927                         'id'   => $name,
1928                         'cols' => $wgUser->getIntOption( 'cols' ),
1929                         'rows' => $wgUser->getIntOption( 'rows' ),
1930                         'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
1931                 );
1932
1933                 $pageLang = $this->mTitle->getPageLanguage();
1934                 $attribs['lang'] = $pageLang->getCode();
1935                 $attribs['dir'] = $pageLang->getDir();
1936
1937                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
1938         }
1939
1940         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
1941                 global $wgOut;
1942                 $classes = array();
1943                 if ( $isOnTop )
1944                         $classes[] = 'ontop';
1945
1946                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
1947
1948                 if ( $this->formtype != 'preview' )
1949                         $attribs['style'] = 'display: none;';
1950
1951                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
1952
1953                 if ( $this->formtype == 'preview' ) {
1954                         $this->showPreview( $previewOutput );
1955                 }
1956
1957                 $wgOut->addHTML( '</div>' );
1958
1959                 if ( $this->formtype == 'diff') {
1960                         $this->showDiff();
1961                 }
1962         }
1963
1964         /**
1965          * Append preview output to $wgOut.
1966          * Includes category rendering if this is a category page.
1967          *
1968          * @param $text String: the HTML to be output for the preview.
1969          */
1970         protected function showPreview( $text ) {
1971                 global $wgOut;
1972                 if ( $this->mTitle->getNamespace() == NS_CATEGORY) {
1973                         $this->mArticle->openShowCategory();
1974                 }
1975                 # This hook seems slightly odd here, but makes things more
1976                 # consistent for extensions.
1977                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
1978                 $wgOut->addHTML( $text );
1979                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
1980                         $this->mArticle->closeShowCategory();
1981                 }
1982         }
1983
1984         /**
1985          * Give a chance for site and per-namespace customizations of
1986          * terms of service summary link that might exist separately
1987          * from the copyright notice.
1988          *
1989          * This will display between the save button and the edit tools,
1990          * so should remain short!
1991          */
1992         protected function showTosSummary() {
1993                 $msg = 'editpage-tos-summary';
1994                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
1995                 if( !wfMessage( $msg )->isDisabled() ) {
1996                         global $wgOut;
1997                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
1998                         $wgOut->addWikiMsg( $msg );
1999                         $wgOut->addHTML( '</div>' );
2000                 }
2001         }
2002
2003         protected function showEditTools() {
2004                 global $wgOut;
2005                 $wgOut->addHTML( '<div class="mw-editTools">' .
2006                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
2007                         '</div>' );
2008         }
2009
2010         protected function getCopywarn() {
2011                 global $wgRightsText;
2012                 if ( $wgRightsText ) {
2013                         $copywarnMsg = array( 'copyrightwarning',
2014                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
2015                                 $wgRightsText );
2016                 } else {
2017                         $copywarnMsg = array( 'copyrightwarning2',
2018                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
2019                 }
2020                 // Allow for site and per-namespace customization of contribution/copyright notice.
2021                 wfRunHooks( 'EditPageCopyrightWarning', array( $this->mTitle, &$copywarnMsg ) );
2022
2023                 return "<div id=\"editpage-copywarn\">\n" .
2024                         call_user_func_array("wfMsgNoTrans", $copywarnMsg) . "\n</div>";
2025         }
2026
2027         protected function showStandardInputs( &$tabindex = 2 ) {
2028                 global $wgOut;
2029                 $wgOut->addHTML( "<div class='editOptions'>\n" );
2030
2031                 if ( $this->section != 'new' ) {
2032                         $this->showSummaryInput( false, $this->summary );
2033                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
2034                 }
2035
2036                 $checkboxes = $this->getCheckboxes( $tabindex,
2037                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
2038                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
2039                 $wgOut->addHTML( "<div class='editButtons'>\n" );
2040                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
2041
2042                 $cancel = $this->getCancelLink();
2043                 if ( $cancel !== '' ) {
2044                         $cancel .= wfMsgExt( 'pipe-separator' , 'escapenoentities' );
2045                 }
2046                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ) );
2047                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
2048                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
2049                         htmlspecialchars( wfMsg( 'newwindow' ) );
2050                 $wgOut->addHTML( "      <span class='editHelp'>{$cancel}{$edithelp}</span>\n" );
2051                 $wgOut->addHTML( "</div><!-- editButtons -->\n</div><!-- editOptions -->\n" );
2052         }
2053
2054         /**
2055          * Show an edit conflict. textbox1 is already shown in showEditForm().
2056          * If you want to use another entry point to this function, be careful.
2057          */
2058         protected function showConflict() {
2059                 global $wgOut;
2060                 $this->textbox2 = $this->textbox1;
2061                 $this->textbox1 = $this->getContent();
2062                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
2063                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2064
2065                         $de = new DifferenceEngine( $this->mTitle );
2066                         $de->setText( $this->textbox2, $this->textbox1 );
2067                         $de->showDiff( wfMsgExt( 'yourtext', 'parseinline' ), wfMsg( 'storedversion' ) );
2068
2069                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2070                         $this->showTextbox2();
2071                 }
2072         }
2073
2074         protected function getLastDelete() {
2075                 $dbr = wfGetDB( DB_SLAVE );
2076                 $data = $dbr->selectRow(
2077                         array( 'logging', 'user' ),
2078                         array( 'log_type',
2079                                    'log_action',
2080                                    'log_timestamp',
2081                                    'log_user',
2082                                    'log_namespace',
2083                                    'log_title',
2084                                    'log_comment',
2085                                    'log_params',
2086                                    'log_deleted',
2087                                    'user_name' ),
2088                         array( 'log_namespace' => $this->mTitle->getNamespace(),
2089                                    'log_title' => $this->mTitle->getDBkey(),
2090                                    'log_type' => 'delete',
2091                                    'log_action' => 'delete',
2092                                    'user_id=log_user' ),
2093                         __METHOD__,
2094                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
2095                 );
2096                 // Quick paranoid permission checks...
2097                 if( is_object( $data ) ) {
2098                         if( $data->log_deleted & LogPage::DELETED_USER )
2099                                 $data->user_name = wfMsgHtml( 'rev-deleted-user' );
2100                         if( $data->log_deleted & LogPage::DELETED_COMMENT )
2101                                 $data->log_comment = wfMsgHtml( 'rev-deleted-comment' );
2102                 }
2103                 return $data;
2104         }
2105
2106         /**
2107          * Get the rendered text for previewing.
2108          * @return string
2109          */
2110         function getPreviewText() {
2111                 global $wgOut, $wgUser, $wgParser;
2112
2113                 wfProfileIn( __METHOD__ );
2114
2115                 if ( $this->mTriedSave && !$this->mTokenOk ) {
2116                         if ( $this->mTokenOkExceptSuffix ) {
2117                                 $note = wfMsg( 'token_suffix_mismatch' );
2118                         } else {
2119                                 $note = wfMsg( 'session_fail_preview' );
2120                         }
2121                 } elseif ( $this->incompleteForm ) {
2122                         $note = wfMsg( 'edit_form_incomplete' );
2123                 } else {
2124                         $note = wfMsg( 'previewnote' );
2125                 }
2126
2127                 $parserOptions = ParserOptions::newFromUser( $wgUser );
2128                 $parserOptions->setEditSection( false );
2129                 $parserOptions->setIsPreview( true );
2130                 $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
2131
2132                 global $wgRawHtml;
2133                 if ( $wgRawHtml && !$this->mTokenOk ) {
2134                         // Could be an offsite preview attempt. This is very unsafe if
2135                         // HTML is enabled, as it could be an attack.
2136                         $parsedNote = '';
2137                         if ( $this->textbox1 !== '' ) {
2138                                 // Do not put big scary notice, if previewing the empty
2139                                 // string, which happens when you initially edit
2140                                 // a category page, due to automatic preview-on-open.
2141                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
2142                                         wfMsg( 'session_fail_preview_html' ) . "</div>", true, /* interface */true );
2143                         }
2144                         wfProfileOut( __METHOD__ );
2145                         return $parsedNote;
2146                 }
2147
2148                 # don't parse non-wikitext pages, show message about preview
2149                 # 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?
2150
2151                 if ( $this->isCssJsSubpage || !$this->mTitle->isWikitextPage() ) {
2152                         if( $this->mTitle->isCssJsSubpage() ) {
2153                                 $level = 'user';
2154                         } elseif( $this->mTitle->isCssOrJsPage() ) {
2155                                 $level = 'site';
2156                         } else {
2157                                 $level = false;
2158                         }
2159
2160                         # Used messages to make sure grep find them:
2161                         # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
2162                         if( $level ) {
2163                                 if (preg_match( "/\\.css$/", $this->mTitle->getText() ) ) {
2164                                         $previewtext = "<div id='mw-{$level}csspreview'>\n" . wfMsg( "{$level}csspreview" ) . "\n</div>";
2165                                         $class = "mw-code mw-css";
2166                                 } elseif (preg_match( "/\\.js$/", $this->mTitle->getText() ) ) {
2167                                         $previewtext = "<div id='mw-{$level}jspreview'>\n" . wfMsg( "{$level}jspreview" ) . "\n</div>";
2168                                         $class = "mw-code mw-js";
2169                                 } else {
2170                                         throw new MWException( 'A CSS/JS (sub)page but which is not css nor js!' );
2171                                 }
2172                         }
2173
2174                         $parserOptions->setTidy( true );
2175                         $parserOutput = $wgParser->parse( $previewtext, $this->mTitle, $parserOptions );
2176                         $previewHTML = $parserOutput->mText;
2177                         $previewHTML .= "<pre class=\"$class\" dir=\"ltr\">\n" . htmlspecialchars( $this->textbox1 ) . "\n</pre>\n";
2178                 } else {
2179                         $rt = Title::newFromRedirectArray( $this->textbox1 );
2180                         if ( $rt ) {
2181                                 $previewHTML = $this->mArticle->viewRedirect( $rt, false );
2182                         } else {
2183                                 $toparse = $this->textbox1;
2184
2185                                 # If we're adding a comment, we need to show the
2186                                 # summary as the headline
2187                                 if ( $this->section == "new" && $this->summary != "" ) {
2188                                         $toparse = "== {$this->summary} ==\n\n" . $toparse;
2189                                 }
2190
2191                                 wfRunHooks( 'EditPageGetPreviewText', array( $this, &$toparse ) );
2192
2193                                 $parserOptions->setTidy( true );
2194                                 $parserOptions->enableLimitReport();
2195                                 $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ),
2196                                         $this->mTitle, $parserOptions );
2197
2198                                 $previewHTML = $parserOutput->getText();
2199                                 $this->mParserOutput = $parserOutput;
2200                                 $wgOut->addParserOutputNoText( $parserOutput );
2201
2202                                 if ( count( $parserOutput->getWarnings() ) ) {
2203                                         $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
2204                                 }
2205                         }
2206                 }
2207
2208                 if( $this->isConflict ) {
2209                         $conflict = '<h2 id="mw-previewconflict">' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
2210                 } else {
2211                         $conflict = '<hr />';
2212                 }
2213
2214                 $previewhead = "<div class='previewnote'>\n" .
2215                         '<h2 id="mw-previewheader">' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>" .
2216                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
2217
2218                 $pageLang = $this->mTitle->getPageLanguage();
2219                 $attribs = array( 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
2220                         'class' => 'mw-content-'.$pageLang->getDir() );
2221                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
2222
2223                 wfProfileOut( __METHOD__ );
2224                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
2225         }
2226
2227         /**
2228          * @return Array
2229          */
2230         function getTemplates() {
2231                 if ( $this->preview || $this->section != '' ) {
2232                         $templates = array();
2233                         if ( !isset( $this->mParserOutput ) ) {
2234                                 return $templates;
2235                         }
2236                         foreach( $this->mParserOutput->getTemplates() as $ns => $template) {
2237                                 foreach( array_keys( $template ) as $dbk ) {
2238                                         $templates[] = Title::makeTitle($ns, $dbk);
2239                                 }
2240                         }
2241                         return $templates;
2242                 } else {
2243                         return $this->mArticle->getUsedTemplates();
2244                 }
2245         }
2246
2247         /**
2248          * Call the stock "user is blocked" page
2249          *
2250          * @deprecated in 1.19; throw an exception directly instead
2251          */
2252         function blockedPage() {
2253                 global $wgUser;
2254
2255                 throw new UserBlockedError( $wgUser->mBlock );
2256         }
2257
2258         /**
2259          * Produce the stock "please login to edit pages" page
2260          *
2261          * @deprecated in 1.19; throw an exception directly instead
2262          */
2263         function userNotLoggedInPage() {
2264                 throw new PermissionsError( 'edit' );
2265         }
2266
2267         /**
2268          * Show an error page saying to the user that he has insufficient permissions
2269          * to create a new page
2270          *
2271          * @deprecated in 1.19; throw an exception directly instead
2272          */
2273         function noCreatePermission() {
2274                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
2275                 throw new PermissionsError( $permission );
2276         }
2277
2278         /**
2279          * Creates a basic error page which informs the user that
2280          * they have attempted to edit a nonexistent section.
2281          */
2282         function noSuchSectionPage() {
2283                 global $wgOut;
2284
2285                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
2286
2287                 $res = wfMsgExt( 'nosuchsectiontext', 'parse', $this->section );
2288                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
2289                 $wgOut->addHTML( $res );
2290
2291                 $wgOut->returnToMain( false, $this->mTitle );
2292         }
2293
2294         /**
2295          * Produce the stock "your edit contains spam" page
2296          *
2297          * @param $match Text which triggered one or more filters
2298          * @deprecated since 1.17 Use method spamPageWithContent() instead
2299          */
2300         static function spamPage( $match = false ) {
2301                 global $wgOut, $wgTitle;
2302
2303                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
2304
2305                 $wgOut->addHTML( '<div id="spamprotected">' );
2306                 $wgOut->addWikiMsg( 'spamprotectiontext' );
2307                 if ( $match ) {
2308                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
2309                 }
2310                 $wgOut->addHTML( '</div>' );
2311
2312                 $wgOut->returnToMain( false, $wgTitle );
2313         }
2314
2315         /**
2316          * Show "your edit contains spam" page with your diff and text
2317          *
2318          * @param $match Text which triggered one or more filters
2319          */
2320         public function spamPageWithContent( $match = false ) {
2321                 global $wgOut;
2322                 $this->textbox2 = $this->textbox1;
2323
2324                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
2325
2326                 $wgOut->addHTML( '<div id="spamprotected">' );
2327                 $wgOut->addWikiMsg( 'spamprotectiontext' );
2328                 if ( $match ) {
2329                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
2330                 }
2331                 $wgOut->addHTML( '</div>' );
2332
2333                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2334                 $de = new DifferenceEngine( $this->mTitle );
2335                 $de->setText( $this->getContent(), $this->textbox2 );
2336                 $de->showDiff( wfMsg( "storedversion" ), wfMsgExt( 'yourtext', 'parseinline' ) );
2337
2338                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2339                 $this->showTextbox2();
2340
2341                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
2342         }
2343
2344
2345         /**
2346          * @private
2347          * @todo document
2348          *
2349          * @parma $editText string
2350          *
2351          * @return bool
2352          */
2353         function mergeChangesInto( &$editText ){
2354                 wfProfileIn( __METHOD__ );
2355
2356                 $db = wfGetDB( DB_MASTER );
2357
2358                 // This is the revision the editor started from
2359                 $baseRevision = $this->getBaseRevision();
2360                 if ( is_null( $baseRevision ) ) {
2361                         wfProfileOut( __METHOD__ );
2362                         return false;
2363                 }
2364                 $baseText = $baseRevision->getText();
2365
2366                 // The current state, we want to merge updates into it
2367                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2368                 if ( is_null( $currentRevision ) ) {
2369                         wfProfileOut( __METHOD__ );
2370                         return false;
2371                 }
2372                 $currentText = $currentRevision->getText();
2373
2374                 $result = '';
2375                 if ( wfMerge( $baseText, $editText, $currentText, $result ) ) {
2376                         $editText = $result;
2377                         wfProfileOut( __METHOD__ );
2378                         return true;
2379                 } else {
2380                         wfProfileOut( __METHOD__ );
2381                         return false;
2382                 }
2383         }
2384
2385         /**
2386          * Check if the browser is on a blacklist of user-agents known to
2387          * mangle UTF-8 data on form submission. Returns true if Unicode
2388          * should make it through, false if it's known to be a problem.
2389          * @return bool
2390          * @private
2391          */
2392         function checkUnicodeCompliantBrowser() {
2393                 global $wgBrowserBlackList;
2394                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
2395                         // No User-Agent header sent? Trust it by default...
2396                         return true;
2397                 }
2398                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
2399                 foreach ( $wgBrowserBlackList as $browser ) {
2400                         if ( preg_match($browser, $currentbrowser) ) {
2401                                 return false;
2402                         }
2403                 }
2404                 return true;
2405         }
2406
2407         /**
2408          * Format an anchor fragment as it would appear for a given section name
2409          * @param $text String
2410          * @return String
2411          * @private
2412          */
2413         function sectionAnchor( $text ) {
2414                 global $wgParser;
2415                 return $wgParser->guessSectionNameFromWikiText( $text );
2416         }
2417
2418         /**
2419          * Shows a bulletin board style toolbar for common editing functions.
2420          * It can be disabled in the user preferences.
2421          * The necessary JavaScript code can be found in skins/common/edit.js.
2422          *
2423          * @return string
2424          */
2425         static function getEditToolbar() {
2426                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
2427                 global $wgUseTeX, $wgEnableUploads, $wgForeignFileRepos;
2428
2429                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
2430
2431                 /**
2432                  * $toolarray is an array of arrays each of which includes the
2433                  * filename of the button image (without path), the opening
2434                  * tag, the closing tag, optionally a sample text that is
2435                  * inserted between the two when no selection is highlighted
2436                  * and.  The tip text is shown when the user moves the mouse
2437                  * over the button.
2438                  *
2439                  * Also here: accesskeys (key), which are not used yet until
2440                  * someone can figure out a way to make them work in
2441                  * IE. However, we should make sure these keys are not defined
2442                  * on the edit page.
2443                  */
2444                 $toolarray = array(
2445                         array(
2446                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
2447                                 'id'     => 'mw-editbutton-bold',
2448                                 'open'   => '\'\'\'',
2449                                 'close'  => '\'\'\'',
2450                                 'sample' => wfMsg( 'bold_sample' ),
2451                                 'tip'    => wfMsg( 'bold_tip' ),
2452                                 'key'    => 'B'
2453                         ),
2454                         array(
2455                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
2456                                 'id'     => 'mw-editbutton-italic',
2457                                 'open'   => '\'\'',
2458                                 'close'  => '\'\'',
2459                                 'sample' => wfMsg( 'italic_sample' ),
2460                                 'tip'    => wfMsg( 'italic_tip' ),
2461                                 'key'    => 'I'
2462                         ),
2463                         array(
2464                                 'image'  => $wgLang->getImageFile( 'button-link' ),
2465                                 'id'     => 'mw-editbutton-link',
2466                                 'open'   => '[[',
2467                                 'close'  => ']]',
2468                                 'sample' => wfMsg( 'link_sample' ),
2469                                 'tip'    => wfMsg( 'link_tip' ),
2470                                 'key'    => 'L'
2471                         ),
2472                         array(
2473                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
2474                                 'id'     => 'mw-editbutton-extlink',
2475                                 'open'   => '[',
2476                                 'close'  => ']',
2477                                 'sample' => wfMsg( 'extlink_sample' ),
2478                                 'tip'    => wfMsg( 'extlink_tip' ),
2479                                 'key'    => 'X'
2480                         ),
2481                         array(
2482                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
2483                                 'id'     => 'mw-editbutton-headline',
2484                                 'open'   => "\n== ",
2485                                 'close'  => " ==\n",
2486                                 'sample' => wfMsg( 'headline_sample' ),
2487                                 'tip'    => wfMsg( 'headline_tip' ),
2488                                 'key'    => 'H'
2489                         ),
2490                         $imagesAvailable ? array(
2491                                 'image'  => $wgLang->getImageFile( 'button-image' ),
2492                                 'id'     => 'mw-editbutton-image',
2493                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
2494                                 'close'  => ']]',
2495                                 'sample' => wfMsg( 'image_sample' ),
2496                                 'tip'    => wfMsg( 'image_tip' ),
2497                                 'key'    => 'D',
2498                         ) : false,
2499                         $imagesAvailable ? array(
2500                                 'image'  => $wgLang->getImageFile( 'button-media' ),
2501                                 'id'     => 'mw-editbutton-media',
2502                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
2503                                 'close'  => ']]',
2504                                 'sample' => wfMsg( 'media_sample' ),
2505                                 'tip'    => wfMsg( 'media_tip' ),
2506                                 'key'    => 'M'
2507                         ) : false,
2508                         $wgUseTeX ?     array(
2509                                 'image'  => $wgLang->getImageFile( 'button-math' ),
2510                                 'id'     => 'mw-editbutton-math',
2511                                 'open'   => "<math>",
2512                                 'close'  => "</math>",
2513                                 'sample' => wfMsg( 'math_sample' ),
2514                                 'tip'    => wfMsg( 'math_tip' ),
2515                                 'key'    => 'C'
2516                         ) : false,
2517                         array(
2518                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
2519                                 'id'     => 'mw-editbutton-nowiki',
2520                                 'open'   => "<nowiki>",
2521                                 'close'  => "</nowiki>",
2522                                 'sample' => wfMsg( 'nowiki_sample' ),
2523                                 'tip'    => wfMsg( 'nowiki_tip' ),
2524                                 'key'    => 'N'
2525                         ),
2526                         array(
2527                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
2528                                 'id'     => 'mw-editbutton-signature',
2529                                 'open'   => '--~~~~',
2530                                 'close'  => '',
2531                                 'sample' => '',
2532                                 'tip'    => wfMsg( 'sig_tip' ),
2533                                 'key'    => 'Y'
2534                         ),
2535                         array(
2536                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
2537                                 'id'     => 'mw-editbutton-hr',
2538                                 'open'   => "\n----\n",
2539                                 'close'  => '',
2540                                 'sample' => '',
2541                                 'tip'    => wfMsg( 'hr_tip' ),
2542                                 'key'    => 'R'
2543                         )
2544                 );
2545
2546                 $script = '';
2547                 foreach ( $toolarray as $tool ) {
2548                         if ( !$tool ) {
2549                                 continue;
2550                         }
2551
2552                         $params = array(
2553                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
2554                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
2555                                 // Older browsers show a "speedtip" type message only for ALT.
2556                                 // Ideally these should be different, realistically they
2557                                 // probably don't need to be.
2558                                 $tip = $tool['tip'],
2559                                 $open = $tool['open'],
2560                                 $close = $tool['close'],
2561                                 $sample = $tool['sample'],
2562                                 $cssId = $tool['id'],
2563                         );
2564
2565                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
2566                 }
2567                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
2568
2569                 $toolbar = '<div id="toolbar"></div>';
2570
2571                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
2572
2573                 return $toolbar;
2574         }
2575
2576         /**
2577          * Returns an array of html code of the following checkboxes:
2578          * minor and watch
2579          *
2580          * @param $tabindex Current tabindex
2581          * @param $checked Array of checkbox => bool, where bool indicates the checked
2582          *                 status of the checkbox
2583          *
2584          * @return array
2585          */
2586         public function getCheckboxes( &$tabindex, $checked ) {
2587                 global $wgUser;
2588
2589                 $checkboxes = array();
2590
2591                 // don't show the minor edit checkbox if it's a new page or section
2592                 if ( !$this->isNew ) {
2593                         $checkboxes['minor'] = '';
2594                         $minorLabel = wfMsgExt( 'minoredit', array( 'parseinline' ) );
2595                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
2596                                 $attribs = array(
2597                                         'tabindex'  => ++$tabindex,
2598                                         'accesskey' => wfMsg( 'accesskey-minoredit' ),
2599                                         'id'        => 'wpMinoredit',
2600                                 );
2601                                 $checkboxes['minor'] =
2602                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
2603                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
2604                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
2605                                         ">{$minorLabel}</label>";
2606                         }
2607                 }
2608
2609                 $watchLabel = wfMsgExt( 'watchthis', array( 'parseinline' ) );
2610                 $checkboxes['watch'] = '';
2611                 if ( $wgUser->isLoggedIn() ) {
2612                         $attribs = array(
2613                                 'tabindex'  => ++$tabindex,
2614                                 'accesskey' => wfMsg( 'accesskey-watch' ),
2615                                 'id'        => 'wpWatchthis',
2616                         );
2617                         $checkboxes['watch'] =
2618                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
2619                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
2620                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
2621                                 ">{$watchLabel}</label>";
2622                 }
2623                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
2624                 return $checkboxes;
2625         }
2626
2627         /**
2628          * Returns an array of html code of the following buttons:
2629          * save, diff, preview and live
2630          *
2631          * @param $tabindex Current tabindex
2632          *
2633          * @return array
2634          */
2635         public function getEditButtons( &$tabindex ) {
2636                 $buttons = array();
2637
2638                 $temp = array(
2639                         'id'        => 'wpSave',
2640                         'name'      => 'wpSave',
2641                         'type'      => 'submit',
2642                         'tabindex'  => ++$tabindex,
2643                         'value'     => wfMsg( 'savearticle' ),
2644                         'accesskey' => wfMsg( 'accesskey-save' ),
2645                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
2646                 );
2647                 $buttons['save'] = Xml::element('input', $temp, '');
2648
2649                 ++$tabindex; // use the same for preview and live preview
2650                 $temp = array(
2651                         'id'        => 'wpPreview',
2652                         'name'      => 'wpPreview',
2653                         'type'      => 'submit',
2654                         'tabindex'  => $tabindex,
2655                         'value'     => wfMsg( 'showpreview' ),
2656                         'accesskey' => wfMsg( 'accesskey-preview' ),
2657                         'title'     => wfMsg( 'tooltip-preview' ) . ' [' . wfMsg( 'accesskey-preview' ) . ']',
2658                 );
2659                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
2660                 $buttons['live'] = '';
2661
2662                 $temp = array(
2663                         'id'        => 'wpDiff',
2664                         'name'      => 'wpDiff',
2665                         'type'      => 'submit',
2666                         'tabindex'  => ++$tabindex,
2667                         'value'     => wfMsg( 'showdiff' ),
2668                         'accesskey' => wfMsg( 'accesskey-diff' ),
2669                         'title'     => wfMsg( 'tooltip-diff' ) . ' [' . wfMsg( 'accesskey-diff' ) . ']',
2670                 );
2671                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
2672
2673                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
2674                 return $buttons;
2675         }
2676
2677         /**
2678          * Output preview text only. This can be sucked into the edit page
2679          * via JavaScript, and saves the server time rendering the skin as
2680          * well as theoretically being more robust on the client (doesn't
2681          * disturb the edit box's undo history, won't eat your text on
2682          * failure, etc).
2683          *
2684          * @todo This doesn't include category or interlanguage links.
2685          *       Would need to enhance it a bit, <s>maybe wrap them in XML
2686          *       or something...</s> that might also require more skin
2687          *       initialization, so check whether that's a problem.
2688          */
2689         function livePreview() {
2690                 global $wgOut;
2691                 $wgOut->disable();
2692                 header( 'Content-type: text/xml; charset=utf-8' );
2693                 header( 'Cache-control: no-cache' );
2694
2695                 $previewText = $this->getPreviewText();
2696                 #$categories = $skin->getCategoryLinks();
2697
2698                 $s =
2699                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
2700                 Xml::tags( 'livepreview', null,
2701                         Xml::element( 'preview', null, $previewText )
2702                         #.      Xml::element( 'category', null, $categories )
2703                 );
2704                 echo $s;
2705         }
2706
2707         /**
2708          * @return string
2709          */
2710         public function getCancelLink() {
2711                 $cancelParams = array();
2712                 if ( !$this->isConflict && $this->mArticle->getOldID() > 0 ) {
2713                         $cancelParams['oldid'] = $this->mArticle->getOldID();
2714                 }
2715
2716                 return Linker::linkKnown(
2717                         $this->getContextTitle(),
2718                         wfMsgExt( 'cancel', array( 'parseinline' ) ),
2719                         array( 'id' => 'mw-editform-cancel' ),
2720                         $cancelParams
2721                 );
2722         }
2723
2724         /**
2725          * Get a diff between the current contents of the edit box and the
2726          * version of the page we're editing from.
2727          *
2728          * If this is a section edit, we'll replace the section as for final
2729          * save and then make a comparison.
2730          */
2731         function showDiff() {
2732                 $oldtext = $this->mArticle->fetchContent();
2733                 $newtext = $this->mArticle->replaceSection(
2734                         $this->section, $this->textbox1, $this->summary, $this->edittime );
2735
2736                 wfRunHooks( 'EditPageGetDiffText', array( $this, &$newtext ) );
2737
2738                 $newtext = $this->mArticle->preSaveTransform( $newtext );
2739                 $oldtitle = wfMsgExt( 'currentrev', array( 'parseinline' ) );
2740                 $newtitle = wfMsgExt( 'yourtext', array( 'parseinline' ) );
2741                 if ( $oldtext !== false  || $newtext != '' ) {
2742                         $de = new DifferenceEngine( $this->mTitle );
2743                         $de->setText( $oldtext, $newtext );
2744                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2745                         $de->showDiffStyle();
2746                 } else {
2747                         $difftext = '';
2748                 }
2749
2750                 global $wgOut;
2751                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2752         }
2753
2754         /**
2755          * Filter an input field through a Unicode de-armoring process if it
2756          * came from an old browser with known broken Unicode editing issues.
2757          *
2758          * @param $request WebRequest
2759          * @param $field String
2760          * @return String
2761          * @private
2762          */
2763         function safeUnicodeInput( $request, $field ) {
2764                 $text = rtrim( $request->getText( $field ) );
2765                 return $request->getBool( 'safemode' )
2766                         ? $this->unmakesafe( $text )
2767                         : $text;
2768         }
2769
2770         /**
2771          * @param $request WebRequest
2772          * @param $text string
2773          * @return string
2774          */
2775         function safeUnicodeText( $request, $text ) {
2776                 $text = rtrim( $text );
2777                 return $request->getBool( 'safemode' )
2778                         ? $this->unmakesafe( $text )
2779                         : $text;
2780         }
2781
2782         /**
2783          * Filter an output field through a Unicode armoring process if it is
2784          * going to an old browser with known broken Unicode editing issues.
2785          *
2786          * @param $text String
2787          * @return String
2788          * @private
2789          */
2790         function safeUnicodeOutput( $text ) {
2791                 global $wgContLang;
2792                 $codedText = $wgContLang->recodeForEdit( $text );
2793                 return $this->checkUnicodeCompliantBrowser()
2794                         ? $codedText
2795                         : $this->makesafe( $codedText );
2796         }
2797
2798         /**
2799          * A number of web browsers are known to corrupt non-ASCII characters
2800          * in a UTF-8 text editing environment. To protect against this,
2801          * detected browsers will be served an armored version of the text,
2802          * with non-ASCII chars converted to numeric HTML character references.
2803          *
2804          * Preexisting such character references will have a 0 added to them
2805          * to ensure that round-trips do not alter the original data.
2806          *
2807          * @param $invalue String
2808          * @return String
2809          * @private
2810          */
2811         function makesafe( $invalue ) {
2812                 // Armor existing references for reversability.
2813                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
2814
2815                 $bytesleft = 0;
2816                 $result = "";
2817                 $working = 0;
2818                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2819                         $bytevalue = ord( $invalue[$i] );
2820                         if ( $bytevalue <= 0x7F ) { //0xxx xxxx
2821                                 $result .= chr( $bytevalue );
2822                                 $bytesleft = 0;
2823                         } elseif ( $bytevalue <= 0xBF ) { //10xx xxxx
2824                                 $working = $working << 6;
2825                                 $working += ($bytevalue & 0x3F);
2826                                 $bytesleft--;
2827                                 if ( $bytesleft <= 0 ) {
2828                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
2829                                 }
2830                         } elseif ( $bytevalue <= 0xDF ) { //110x xxxx
2831                                 $working = $bytevalue & 0x1F;
2832                                 $bytesleft = 1;
2833                         } elseif ( $bytevalue <= 0xEF ) { //1110 xxxx
2834                                 $working = $bytevalue & 0x0F;
2835                                 $bytesleft = 2;
2836                         } else { //1111 0xxx
2837                                 $working = $bytevalue & 0x07;
2838                                 $bytesleft = 3;
2839                         }
2840                 }
2841                 return $result;
2842         }
2843
2844         /**
2845          * Reverse the previously applied transliteration of non-ASCII characters
2846          * back to UTF-8. Used to protect data from corruption by broken web browsers
2847          * as listed in $wgBrowserBlackList.
2848          *
2849          * @param $invalue String
2850          * @return String
2851          * @private
2852          */
2853         function unmakesafe( $invalue ) {
2854                 $result = "";
2855                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2856                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i+3] != '0' ) ) {
2857                                 $i += 3;
2858                                 $hexstring = "";
2859                                 do {
2860                                         $hexstring .= $invalue[$i];
2861                                         $i++;
2862                                 } while( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
2863
2864                                 // Do some sanity checks. These aren't needed for reversability,
2865                                 // but should help keep the breakage down if the editor
2866                                 // breaks one of the entities whilst editing.
2867                                 if ( (substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6) ) {
2868                                         $codepoint = hexdec($hexstring);
2869                                         $result .= codepointToUtf8( $codepoint );
2870                                 } else {
2871                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
2872                                 }
2873                         } else {
2874                                 $result .= substr( $invalue, $i, 1 );
2875                         }
2876                 }
2877                 // reverse the transform that we made for reversability reasons.
2878                 return strtr( $result, array( "&#x0" => "&#x" ) );
2879         }
2880
2881         /**
2882          * Attempt submission
2883          * @return bool false if output is done, true if the rest of the form should be displayed
2884          */
2885         function attemptSave() {
2886                 global $wgUser, $wgOut;
2887
2888                 $resultDetails = false;
2889                 # Allow bots to exempt some edits from bot flagging
2890                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
2891                 $status = $this->internalAttemptSave( $resultDetails, $bot );
2892                 // FIXME: once the interface for internalAttemptSave() is made nicer, this should use the message in $status
2893
2894                 if ( $status->value == self::AS_SUCCESS_UPDATE || $status->value == self::AS_SUCCESS_NEW_ARTICLE ) {
2895                         $this->didSave = true;
2896                 }
2897
2898                 switch ( $status->value ) {
2899                         case self::AS_HOOK_ERROR_EXPECTED:
2900                         case self::AS_CONTENT_TOO_BIG:
2901                         case self::AS_ARTICLE_WAS_DELETED:
2902                         case self::AS_CONFLICT_DETECTED:
2903                         case self::AS_SUMMARY_NEEDED:
2904                         case self::AS_TEXTBOX_EMPTY:
2905                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
2906                         case self::AS_END:
2907                                 return true;
2908
2909                         case self::AS_HOOK_ERROR:
2910                         case self::AS_FILTERING:
2911                                 return false;
2912
2913                         case self::AS_SUCCESS_NEW_ARTICLE:
2914                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
2915                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) );
2916                                 return false;
2917
2918                         case self::AS_SUCCESS_UPDATE:
2919                                 $extraQuery = '';
2920                                 $sectionanchor = $resultDetails['sectionanchor'];
2921
2922                                 // Give extensions a chance to modify URL query on update
2923                                 wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this->mArticle, &$sectionanchor, &$extraQuery ) );
2924
2925                                 if ( $resultDetails['redirect'] ) {
2926                                         if ( $extraQuery == '' ) {
2927                                                 $extraQuery = 'redirect=no';
2928                                         } else {
2929                                                 $extraQuery = 'redirect=no&' . $extraQuery;
2930                                         }
2931                                 }
2932                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
2933                                 return false;
2934
2935                         case self::AS_BLANK_ARTICLE:
2936                                 $wgOut->redirect( $this->getContextTitle()->getFullURL() );
2937                                 return false;
2938
2939                         case self::AS_SPAM_ERROR:
2940                                 $this->spamPageWithContent( $resultDetails['spam'] );
2941                                 return false;
2942
2943                         case self::AS_BLOCKED_PAGE_FOR_USER:
2944                                 throw new UserBlockedError( $wgUser->mBlock );
2945
2946                         case self::AS_IMAGE_REDIRECT_ANON:
2947                         case self::AS_IMAGE_REDIRECT_LOGGED:
2948                                 throw new PermissionsError( 'upload' );
2949
2950                         case self::AS_READ_ONLY_PAGE_ANON:
2951                         case self::AS_READ_ONLY_PAGE_LOGGED:
2952                                 throw new PermissionsError( 'edit' );
2953
2954                         case self::AS_READ_ONLY_PAGE:
2955                                 throw new ReadOnlyError;
2956
2957                         case self::AS_RATE_LIMITED:
2958                                 throw new ThrottledError();
2959
2960                         case self::AS_NO_CREATE_PERMISSION:
2961                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
2962                                 throw new PermissionsError( $permission );
2963
2964                 }
2965                 return false;
2966         }
2967
2968         /**
2969          * @return Revision
2970          */
2971         function getBaseRevision() {
2972                 if ( !$this->mBaseRevision ) {
2973                         $db = wfGetDB( DB_MASTER );
2974                         $baseRevision = Revision::loadFromTimestamp(
2975                                 $db, $this->mTitle, $this->edittime );
2976                         return $this->mBaseRevision = $baseRevision;
2977                 } else {
2978                         return $this->mBaseRevision;
2979                 }
2980         }
2981 }