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