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