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