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