includes/EditPage.php

   1 <?php
   2 /**
   3  * Contains the EditPage class
   4  * @file
   5  */
   6
   7 /**
   8  * The edit page/HTML interface (split from Article)
   9  * The actual database and text munging is still in Article,
  10  * but it should get easier to call those from alternate
  11  * interfaces.
  12  *
  13  * EditPage cares about two distinct titles:
  14  * $this->mContextTitle is the page that forms submit to, links point to,
  15  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  16  * page in the database that is actually being edited. These are
  17  * usually the same, but they are now allowed to be different.
  18  *
  19  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  20  * headaches, which may be fatal.
  21  */
  22 class EditPage {
  23         const AS_SUCCESS_UPDATE            = 200;
  24         const AS_SUCCESS_NEW_ARTICLE       = 201;
  25         const AS_HOOK_ERROR                = 210;
  26         const AS_FILTERING                 = 211;
  27         const AS_HOOK_ERROR_EXPECTED       = 212;
  28         const AS_BLOCKED_PAGE_FOR_USER     = 215;
  29         const AS_CONTENT_TOO_BIG           = 216;
  30         const AS_USER_CANNOT_EDIT          = 217;
  31         const AS_READ_ONLY_PAGE_ANON       = 218;
  32         const AS_READ_ONLY_PAGE_LOGGED     = 219;
  33         const AS_READ_ONLY_PAGE            = 220;
  34         const AS_RATE_LIMITED              = 221;
  35         const AS_ARTICLE_WAS_DELETED       = 222;
  36         const AS_NO_CREATE_PERMISSION      = 223;
  37         const AS_BLANK_ARTICLE             = 224;
  38         const AS_CONFLICT_DETECTED         = 225;
  39         const AS_SUMMARY_NEEDED            = 226;
  40         const AS_TEXTBOX_EMPTY             = 228;
  41         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
  42         const AS_OK                        = 230;
  43         const AS_END                       = 231;
  44         const AS_SPAM_ERROR                = 232;
  45         const AS_IMAGE_REDIRECT_ANON       = 233;
  46         const AS_IMAGE_REDIRECT_LOGGED     = 234;
  47
  48         /**
  49          * @var Article
  50          */
  51         var $mArticle;
  52
  53         /**
  54          * @var Title
  55          */
  56         var $mTitle;
  57         private $mContextTitle = null;
  58         var $action;
  59         var $isConflict = false;
  60         var $isCssJsSubpage = false;
  61         var $isCssSubpage = false;
  62         var $isJsSubpage = false;
  63         var $isWrongCaseCssJsPage = false;
  64         var $isNew = false; // new page or new section
  65         var $deletedSinceEdit;
  66         var $formtype;
  67         var $firsttime;
  68         var $lastDelete;
  69         var $mTokenOk = false;
  70         var $mTokenOkExceptSuffix = false;
  71         var $mTriedSave = false;
  72         var $incompleteForm = false;
  73         var $tooBig = false;
  74         var $kblength = false;
  75         var $missingComment = false;
  76         var $missingSummary = false;
  77         var $allowBlankSummary = false;
  78         var $autoSumm = '';
  79         var $hookError = '';
  80         #var $mPreviewTemplates;
  81
  82         /**
  83          * @var ParserOutput
  84          */
  85         var $mParserOutput;
  86
  87         var $mBaseRevision = false;
  88         var $mShowSummaryField = true;
  89
  90         # Form values
  91         var $save = false, $preview = false, $diff = false;
  92         var $minoredit = false, $watchthis = false, $recreate = false;
  93         var $textbox1 = '', $textbox2 = '', $summary = '', $nosummary = false;
  94         var $edittime = '', $section = '', $starttime = '';
  95         var $oldid = 0, $editintro = '', $scrolltop = null, $bot = true;
  96
  97         # Placeholders for text injection by hooks (must be HTML)
  98         # extensions should take care to _append_ to the present value
  99         public $editFormPageTop; // Before even the preview
 100         public $editFormTextTop;
 101         public $editFormTextBeforeContent;
 102         public $editFormTextAfterWarn;
 103         public $editFormTextAfterTools;
 104         public $editFormTextBottom;
 105         public $editFormTextAfterContent;
 106         public $previewTextAfterContent;
 107         public $mPreloadText;
 108
 109         /* $didSave should be set to true whenever an article was succesfully altered. */
 110         public $didSave = false;
 111         public $undidRev = 0;
 112
 113         public $suppressIntro = false;
 114
 115         /**
 116          * @todo document
 117          * @param $article Article
 118          */
 119         function __construct( $article ) {
 120                 $this->mArticle =& $article;
 121                 $this->mTitle = $article->getTitle();
 122                 $this->action = 'submit';
 123
 124                 # Placeholders for text injection by hooks (empty per default)
 125                 $this->editFormPageTop =
 126                 $this->editFormTextTop =
 127                 $this->editFormTextBeforeContent =
 128                 $this->editFormTextAfterWarn =
 129                 $this->editFormTextAfterTools =
 130                 $this->editFormTextBottom =
 131                 $this->editFormTextAfterContent =
 132                 $this->previewTextAfterContent =
 133                 $this->mPreloadText = "";
 134         }
 135
 136         /**
 137          * @return Article
 138          */
 139         function getArticle() {
 140                 return $this->mArticle;
 141         }
 142
 143         /**
 144          * Set the context Title object
 145          *
 146          * @param $title Title object or null
 147          */
 148         public function setContextTitle( $title ) {
 149                 $this->mContextTitle = $title;
 150         }
 151
 152         /**
 153          * Get the context title object.
 154          * If not set, $wgTitle will be returned. This behavior might changed in
 155          * the future to return $this->mTitle instead.
 156          *
 157          * @return Title object
 158          */
 159         public function getContextTitle() {
 160                 if ( is_null( $this->mContextTitle ) ) {
 161                         global $wgTitle;
 162                         return $wgTitle;
 163                 } else {
 164                         return $this->mContextTitle;
 165                 }
 166         }
 167
 168         /**
 169          * Fetch initial editing page content.
 170          *
 171          * @param $def_text string
 172          * @returns mixed string on success, $def_text for invalid sections
 173          * @private
 174          */
 175         function getContent( $def_text = '' ) {
 176                 global $wgOut, $wgRequest, $wgParser;
 177
 178                 wfProfileIn( __METHOD__ );
 179                 # Get variables from query string :P
 180                 $section = $wgRequest->getVal( 'section' );
 181
 182                 $preload = $wgRequest->getVal( 'preload',
 183                         // Custom preload text for new sections
 184                         $section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 185                 $undoafter = $wgRequest->getVal( 'undoafter' );
 186                 $undo = $wgRequest->getVal( 'undo' );
 187
 188                 // For message page not locally set, use the i18n message.
 189                 // For other non-existent articles, use preload text if any.
 190                 if ( !$this->mTitle->exists() ) {
 191                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 192                                 # If this is a system message, get the default text.
 193                                 $text = $this->mTitle->getDefaultMessageText();
 194                                 if( $text === false ) {
 195                                         $text = $this->getPreloadedText( $preload );
 196                                 }
 197                         } else {
 198                                 # If requested, preload some text.
 199                                 $text = $this->getPreloadedText( $preload );
 200                         }
 201                 // For existing pages, get text based on "undo" or section parameters.
 202                 } else {
 203                         $text = $this->mArticle->getContent();
 204                         if ( $undo > 0 && $undoafter > 0 && $undo < $undoafter ) {
 205                                 # If they got undoafter and undo round the wrong way, switch them
 206                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 207                         }
 208                         if ( $undo > 0 && $undo > $undoafter ) {
 209                                 # Undoing a specific edit overrides section editing; section-editing
 210                                 # doesn't work with undoing.
 211                                 if ( $undoafter ) {
 212                                         $undorev = Revision::newFromId( $undo );
 213                                         $oldrev = Revision::newFromId( $undoafter );
 214                                 } else {
 215                                         $undorev = Revision::newFromId( $undo );
 216                                         $oldrev = $undorev ? $undorev->getPrevious() : null;
 217                                 }
 218
 219                                 # Sanity check, make sure it's the right page,
 220                                 # the revisions exist and they were not deleted.
 221                                 # Otherwise, $text will be left as-is.
 222                                 if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 223                                         $undorev->getPage() == $oldrev->getPage() &&
 224                                         $undorev->getPage() == $this->mArticle->getID() &&
 225                                         !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 226                                         !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 227
 228                                         $undotext = $this->mArticle->getUndoText( $undorev, $oldrev );
 229                                         if ( $undotext === false ) {
 230                                                 # Warn the user that something went wrong
 231                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-failure">' .
 232                                                         wfMsgNoTrans( 'undo-failure' ) . '</div>', true, /* interface */true );
 233                                         } else {
 234                                                 $text = $undotext;
 235                                                 # Inform the user of our success and set an automatic edit summary
 236                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="mw-undo-success">' .
 237                                                         wfMsgNoTrans( 'undo-success' ) . '</div>', true, /* interface */true );
 238                                                 $firstrev = $oldrev->getNext();
 239                                                 # If we just undid one rev, use an autosummary
 240                                                 if ( $firstrev->mId == $undo ) {
 241                                                         $this->summary = wfMsgForContent( 'undo-summary', $undo, $undorev->getUserText() );
 242                                                         $this->undidRev = $undo;
 243                                                 }
 244                                                 $this->formtype = 'diff';
 245                                         }
 246                                 } else {
 247                                         // Failed basic sanity checks.
 248                                         // Older revisions may have been removed since the link
 249                                         // was created, or we may simply have got bogus input.
 250                                         $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-norev">' .
 251                                                 wfMsgNoTrans( 'undo-norev' ) . '</div>', true, /* interface */true );
 252                                 }
 253                         } elseif ( $section != '' ) {
 254                                 if ( $section == 'new' ) {
 255                                         $text = $this->getPreloadedText( $preload );
 256                                 } else {
 257                                         // Get section edit text (returns $def_text for invalid sections)
 258                                         $text = $wgParser->getSection( $text, $section, $def_text );
 259                                 }
 260                         }
 261                 }
 262
 263                 wfProfileOut( __METHOD__ );
 264                 return $text;
 265         }
 266
 267         /**
 268          * Use this method before edit() to preload some text into the edit box
 269          *
 270          * @param $text string
 271          */
 272         public function setPreloadedText( $text ) {
 273                 $this->mPreloadText = $text;
 274         }
 275
 276         /**
 277          * Get the contents to be preloaded into the box, either set by
 278          * an earlier setPreloadText() or by loading the given page.
 279          *
 280          * @param $preload String: representing the title to preload from.
 281          * @return String
 282          */
 283         protected function getPreloadedText( $preload ) {
 284                 global $wgUser, $wgParser;
 285                 if ( !empty( $this->mPreloadText ) ) {
 286                         return $this->mPreloadText;
 287                 } elseif ( $preload !== '' ) {
 288                         $title = Title::newFromText( $preload );
 289                         # Check for existence to avoid getting MediaWiki:Noarticletext
 290                         if ( isset( $title ) && $title->exists() && $title->userCanRead() ) {
 291                                 $article = new Article( $title );
 292
 293                                 if ( $article->isRedirect() ) {
 294                                         $title = Title::newFromRedirectRecurse( $article->getContent() );
 295                                         # Redirects to missing titles are displayed, to hidden pages are followed
 296                                         # Copying observed behaviour from ?action=view
 297                                         if ( $title->exists() ) {
 298                                                 if ($title->userCanRead() ) {
 299                                                         $article = new Article( $title );
 300                                                 } else {
 301                                                         return "";
 302                                                 }
 303                                         }
 304                                 }
 305                                 $parserOptions = ParserOptions::newFromUser( $wgUser );
 306                                 return $wgParser->getPreloadText( $article->getContent(), $title, $parserOptions );
 307                         }
 308                 }
 309                 return '';
 310         }
 311
 312         /**
 313          * Check if a page was deleted while the user was editing it, before submit.
 314          * Note that we rely on the logging table, which hasn't been always there,
 315          * but that doesn't matter, because this only applies to brand new
 316          * deletes.
 317          */
 318         protected function wasDeletedSinceLastEdit() {
 319                 if ( $this->deletedSinceEdit !== null ) {
 320                         return $this->deletedSinceEdit;
 321                 }
 322
 323                 $this->deletedSinceEdit = false;
 324
 325                 if ( $this->mTitle->isDeletedQuick() ) {
 326                         $this->lastDelete = $this->getLastDelete();
 327                         if ( $this->lastDelete ) {
 328                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
 329                                 if ( $deleteTime > $this->starttime ) {
 330                                         $this->deletedSinceEdit = true;
 331                                 }
 332                         }
 333                 }
 334
 335                 return $this->deletedSinceEdit;
 336         }
 337
 338         /**
 339          * Checks whether the user entered a skin name in uppercase,
 340          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 341          *
 342          * @return bool
 343          */
 344         protected function isWrongCaseCssJsPage() {
 345                 if( $this->mTitle->isCssJsSubpage() ) {
 346                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 347                         $skins = array_merge(
 348                                 array_keys( Skin::getSkinNames() ),
 349                                 array( 'common' )
 350                         );
 351                         return !in_array( $name, $skins )
 352                                 && in_array( strtolower( $name ), $skins );
 353                 } else {
 354                         return false;
 355                 }
 356         }
 357
 358         function submit() {
 359                 $this->edit();
 360         }
 361
 362         /**
 363          * This is the function that gets called for "action=edit". It
 364          * sets up various member variables, then passes execution to
 365          * another function, usually showEditForm()
 366          *
 367          * The edit form is self-submitting, so that when things like
 368          * preview and edit conflicts occur, we get the same form back
 369          * with the extra stuff added.  Only when the final submission
 370          * is made and all is well do we actually save and redirect to
 371          * the newly-edited page.
 372          */
 373         function edit() {
 374                 global $wgOut, $wgRequest, $wgUser;
 375                 // Allow extensions to modify/prevent this form or submission
 376                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 377                         return;
 378                 }
 379
 380                 wfProfileIn( __METHOD__ );
 381                 wfDebug( __METHOD__.": enter\n" );
 382
 383                 $this->importFormData( $wgRequest );
 384                 $this->firsttime = false;
 385
 386                 if ( $this->live ) {
 387                         $this->livePreview();
 388                         wfProfileOut( __METHOD__ );
 389                         return;
 390                 }
 391
 392                 if ( wfReadOnly() && $this->save ) {
 393                         // Force preview
 394                         $this->save = false;
 395                         $this->preview = true;
 396                 }
 397
 398                 $wgOut->addModules( array( 'mediawiki.action.edit' ) );
 399
 400                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
 401                         $wgOut->addModules( 'mediawiki.legacy.preview' );
 402                 }
 403                 // Bug #19334: textarea jumps when editing articles in IE8
 404                 $wgOut->addStyle( 'common/IE80Fixes.css', 'screen', 'IE 8' );
 405
 406                 $permErrors = $this->getEditPermissionErrors();
 407                 if ( $permErrors ) {
 408                         wfDebug( __METHOD__ . ": User can't edit\n" );
 409                         $content = $this->getContent( null );
 410                         $content = $content === '' ? null : $content;
 411                         $this->readOnlyPage( $content, true, $permErrors, 'edit' );
 412                         wfProfileOut( __METHOD__ );
 413                         return;
 414                 } else {
 415                         if ( $this->save ) {
 416                                 $this->formtype = 'save';
 417                         } elseif ( $this->preview ) {
 418                                 $this->formtype = 'preview';
 419                         } elseif ( $this->diff ) {
 420                                 $this->formtype = 'diff';
 421                         } else { # First time through
 422                                 $this->firsttime = true;
 423                                 if ( $this->previewOnOpen() ) {
 424                                         $this->formtype = 'preview';
 425                                 } else {
 426                                         $this->formtype = 'initial';
 427                                 }
 428                         }
 429                 }
 430
 431                 // If they used redlink=1 and the page exists, redirect to the main article
 432                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 433                         $wgOut->redirect( $this->mTitle->getFullURL() );
 434                 }
 435
 436                 wfProfileIn( __METHOD__."-business-end" );
 437
 438                 $this->isConflict = false;
 439                 // css / js subpages of user pages get a special treatment
 440                 $this->isCssJsSubpage       = $this->mTitle->isCssJsSubpage();
 441                 $this->isCssSubpage         = $this->mTitle->isCssSubpage();
 442                 $this->isJsSubpage          = $this->mTitle->isJsSubpage();
 443                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 444                 $this->isNew                = !$this->mTitle->exists() || $this->section == 'new';
 445
 446                 # Show applicable editing introductions
 447                 if ( $this->formtype == 'initial' || $this->firsttime )
 448                         $this->showIntro();
 449
 450                 if ( $this->mTitle->isTalkPage() ) {
 451                         $wgOut->addWikiMsg( 'talkpagetext' );
 452                 }
 453
 454                 # Optional notices on a per-namespace and per-page basis
 455                 $editnotice_ns   = 'editnotice-'.$this->mTitle->getNamespace();
 456                 $editnotice_ns_message = wfMessage( $editnotice_ns )->inContentLanguage();
 457                 if ( $editnotice_ns_message->exists() ) {
 458                         $wgOut->addWikiText( $editnotice_ns_message->plain() );
 459                 }
 460                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
 461                         $parts = explode( '/', $this->mTitle->getDBkey() );
 462                         $editnotice_base = $editnotice_ns;
 463                         while ( count( $parts ) > 0 ) {
 464                                 $editnotice_base .= '-'.array_shift( $parts );
 465                                 $editnotice_base_msg = wfMessage( $editnotice_base )->inContentLanguage();
 466                                 if ( $editnotice_base_msg->exists() ) {
 467                                         $wgOut->addWikiText( $editnotice_base_msg->plain()  );
 468                                 }
 469                         }
 470                 }
 471
 472                 # Attempt submission here.  This will check for edit conflicts,
 473                 # and redundantly check for locked database, blocked IPs, etc.
 474                 # that edit() already checked just in case someone tries to sneak
 475                 # in the back door with a hand-edited submission URL.
 476
 477                 if ( 'save' == $this->formtype ) {
 478                         if ( !$this->attemptSave() ) {
 479                                 wfProfileOut( __METHOD__."-business-end" );
 480                                 wfProfileOut( __METHOD__ );
 481                                 return;
 482                         }
 483                 }
 484
 485                 # First time through: get contents, set time for conflict
 486                 # checking, etc.
 487                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 488                         if ( $this->initialiseForm() === false ) {
 489                                 $this->noSuchSectionPage();
 490                                 wfProfileOut( __METHOD__."-business-end" );
 491                                 wfProfileOut( __METHOD__ );
 492                                 return;
 493                         }
 494                         if ( !$this->mTitle->getArticleId() )
 495                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 496                         else
 497                                 wfRunHooks( 'EditFormInitialText', array( $this ) );
 498                 }
 499
 500                 $this->showEditForm();
 501                 wfProfileOut( __METHOD__."-business-end" );
 502                 wfProfileOut( __METHOD__ );
 503         }
 504
 505         /**
 506          * @return array
 507          */
 508         protected function getEditPermissionErrors() {
 509                 global $wgUser;
 510                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 511                 # Can this title be created?
 512                 if ( !$this->mTitle->exists() ) {
 513                         $permErrors = array_merge( $permErrors,
 514                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 515                 }
 516                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 517                 $remove = array();
 518                 foreach( $permErrors as $error ) {
 519                         if ( ( $this->preview || $this->diff ) &&
 520                                 ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' ) )
 521                         {
 522                                 $remove[] = $error;
 523                         }
 524                 }
 525                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 526                 return $permErrors;
 527         }
 528
 529         /**
 530          * Show a read-only error
 531          * Parameters are the same as OutputPage:readOnlyPage()
 532          * Redirect to the article page if redlink=1
 533          */
 534         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 535                 global $wgRequest, $wgOut;
 536                 if ( $wgRequest->getBool( 'redlink' ) ) {
 537                         // The edit page was reached via a red link.
 538                         // Redirect to the article page and let them click the edit tab if
 539                         // they really want a permission error.
 540                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 541                 } else {
 542                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 543                 }
 544         }
 545
 546         /**
 547          * Should we show a preview when the edit form is first shown?
 548          *
 549          * @return bool
 550          */
 551         protected function previewOnOpen() {
 552                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 553                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 554                         // Explicit override from request
 555                         return true;
 556                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 557                         // Explicit override from request
 558                         return false;
 559                 } elseif ( $this->section == 'new' ) {
 560                         // Nothing *to* preview for new sections
 561                         return false;
 562                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 563                         // Standard preference behaviour
 564                         return true;
 565                 } elseif ( !$this->mTitle->exists() &&
 566                   isset($wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]) &&
 567                   $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 568                 {
 569                         // Categories are special
 570                         return true;
 571                 } else {
 572                         return false;
 573                 }
 574         }
 575
 576         /**
 577          * Does this EditPage class support section editing?
 578          * This is used by EditPage subclasses to indicate their ui cannot handle section edits
 579          *
 580          * @return bool
 581          */
 582         protected function isSectionEditSupported() {
 583                 return true;
 584         }
 585
 586         /**
 587          * Returns the URL to use in the form's action attribute.
 588          * This is used by EditPage subclasses when simply customizing the action
 589          * variable in the constructor is not enough. This can be used when the
 590          * EditPage lives inside of a Special page rather than a custom page action.
 591          *
 592          * @param $title Title object for which is being edited (where we go to for &action= links)
 593          * @return string
 594          */
 595         protected function getActionURL( Title $title ) {
 596                 return $title->getLocalURL( array( 'action' => $this->action ) );
 597         }
 598
 599         /**
 600          * @todo document
 601          * @param $request WebRequest
 602          */
 603         function importFormData( &$request ) {
 604                 global $wgLang, $wgUser;
 605
 606                 wfProfileIn( __METHOD__ );
 607
 608                 # Section edit can come from either the form or a link
 609                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 610
 611                 if ( $request->wasPosted() ) {
 612                         # These fields need to be checked for encoding.
 613                         # Also remove trailing whitespace, but don't remove _initial_
 614                         # whitespace from the text boxes. This may be significant formatting.
 615                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 616                         if ( !$request->getCheck('wpTextbox2') ) {
 617                                 // Skip this if wpTextbox2 has input, it indicates that we came
 618                                 // from a conflict page with raw page text, not a custom form
 619                                 // modified by subclasses
 620                                 wfProfileIn( get_class($this)."::importContentFormData" );
 621                                 $textbox1 = $this->importContentFormData( $request );
 622                                 if ( isset($textbox1) )
 623                                         $this->textbox1 = $textbox1;
 624                                 wfProfileOut( get_class($this)."::importContentFormData" );
 625                         }
 626
 627                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 628                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary' ), 250 );
 629
 630                         # Remove extra headings from summaries and new sections.
 631                         $this->summary = preg_replace('/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary);
 632
 633                         $this->edittime = $request->getVal( 'wpEdittime' );
 634                         $this->starttime = $request->getVal( 'wpStarttime' );
 635
 636                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 637
 638                         if ($this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null) {
 639                                 // wpTextbox1 field is missing, possibly due to being "too big"
 640                                 // according to some filter rules such as Suhosin's setting for
 641                                 // suhosin.request.max_value_length (d'oh)
 642                                 $this->incompleteForm = true;
 643                         } else {
 644                                 // edittime should be one of our last fields; if it's missing,
 645                                 // the submission probably broke somewhere in the middle.
 646                                 $this->incompleteForm = is_null( $this->edittime );
 647                         }
 648                         if ( $this->incompleteForm ) {
 649                                 # If the form is incomplete, force to preview.
 650                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 651                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 652                                 $this->preview = true;
 653                         } else {
 654                                 /* Fallback for live preview */
 655                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 656                                 $this->diff = $request->getCheck( 'wpDiff' );
 657
 658                                 // Remember whether a save was requested, so we can indicate
 659                                 // if we forced preview due to session failure.
 660                                 $this->mTriedSave = !$this->preview;
 661
 662                                 if ( $this->tokenOk( $request ) ) {
 663                                         # Some browsers will not report any submit button
 664                                         # if the user hits enter in the comment box.
 665                                         # The unmarked state will be assumed to be a save,
 666                                         # if the form seems otherwise complete.
 667                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 668                                 } elseif ( $this->diff ) {
 669                                         # Failed token check, but only requested "Show Changes".
 670                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 671                                 } else {
 672                                         # Page might be a hack attempt posted from
 673                                         # an external site. Preview instead of saving.
 674                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 675                                         $this->preview = true;
 676                                 }
 677                         }
 678                         $this->save = !$this->preview && !$this->diff;
 679                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 680                                 $this->edittime = null;
 681                         }
 682
 683                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 684                                 $this->starttime = null;
 685                         }
 686
 687                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 688
 689                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 690                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 691
 692                         # Don't force edit summaries when a user is editing their own user or talk page
 693                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 694                                 $this->mTitle->getText() == $wgUser->getName() )
 695                         {
 696                                 $this->allowBlankSummary = true;
 697                         } else {
 698                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary');
 699                         }
 700
 701                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 702                 } else {
 703                         # Not a posted form? Start with nothing.
 704                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 705                         $this->textbox1  = '';
 706                         $this->summary   = '';
 707                         $this->edittime  = '';
 708                         $this->starttime = wfTimestampNow();
 709                         $this->edit      = false;
 710                         $this->preview   = false;
 711                         $this->save      = false;
 712                         $this->diff      = false;
 713                         $this->minoredit = false;
 714                         $this->watchthis = $request->getBool( 'watchthis', false ); // Watch may be overriden by request parameters
 715                         $this->recreate  = false;
 716
 717                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 718                                 $this->summary = $request->getVal( 'preloadtitle' );
 719                         }
 720                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 721                                 $this->summary = $request->getText( 'summary' );
 722                         }
 723
 724                         if ( $request->getVal( 'minor' ) ) {
 725                                 $this->minoredit = true;
 726                         }
 727                 }
 728
 729                 $this->bot = $request->getBool( 'bot', true );
 730                 $this->nosummary = $request->getBool( 'nosummary' );
 731
 732                 // @todo FIXME: Unused variable?
 733                 $this->oldid = $request->getInt( 'oldid' );
 734
 735                 $this->live = $request->getCheck( 'live' );
 736                 $this->editintro = $request->getText( 'editintro',
 737                         // Custom edit intro for new sections
 738                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 739
 740                 // Allow extensions to modify form data
 741                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 742
 743                 wfProfileOut( __METHOD__ );
 744         }
 745
 746         /**
 747          * Subpage overridable method for extracting the page content data from the
 748          * posted form to be placed in $this->textbox1, if using customized input
 749          * this method should be overrided and return the page text that will be used
 750          * for saving, preview parsing and so on...
 751          *
 752          * @param $request WebRequest
 753          */
 754         protected function importContentFormData( &$request ) {
 755                 return; // Don't do anything, EditPage already extracted wpTextbox1
 756         }
 757
 758         /**
 759          * Make sure the form isn't faking a user's credentials.
 760          *
 761          * @param $request WebRequest
 762          * @return bool
 763          * @private
 764          */
 765         function tokenOk( &$request ) {
 766                 global $wgUser;
 767                 $token = $request->getVal( 'wpEditToken' );
 768                 $this->mTokenOk = $wgUser->matchEditToken( $token );
 769                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
 770                 return $this->mTokenOk;
 771         }
 772
 773         /**
 774          * Show all applicable editing introductions
 775          */
 776         protected function showIntro() {
 777                 global $wgOut, $wgUser;
 778                 if ( $this->suppressIntro ) {
 779                         return;
 780                 }
 781
 782                 $namespace = $this->mTitle->getNamespace();
 783
 784                 if ( $namespace == NS_MEDIAWIKI ) {
 785                         # Show a warning if editing an interface message
 786                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
 787                 }
 788
 789                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
 790                 # Show log extract when the user is currently blocked
 791                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
 792                         $parts = explode( '/', $this->mTitle->getText(), 2 );
 793                         $username = $parts[0];
 794                         $user = User::newFromName( $username, false /* allow IP users*/ );
 795                         $ip = User::isIP( $username );
 796                         if ( !$user->isLoggedIn() && !$ip ) { # User does not exist
 797                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
 798                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
 799                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
 800                                 LogEventsList::showLogExtract(
 801                                         $wgOut,
 802                                         'block',
 803                                         $user->getUserPage()->getPrefixedText(),
 804                                         '',
 805                                         array(
 806                                                 'lim' => 1,
 807                                                 'showIfEmpty' => false,
 808                                                 'msgKey' => array(
 809                                                         'blocked-notice-logextract',
 810                                                         $user->getName() # Support GENDER in notice
 811                                                 )
 812                                         )
 813                                 );
 814                         }
 815                 }
 816                 # Try to add a custom edit intro, or use the standard one if this is not possible.
 817                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
 818                         if ( $wgUser->isLoggedIn() ) {
 819                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1\n</div>", 'newarticletext' );
 820                         } else {
 821                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1\n</div>", 'newarticletextanon' );
 822                         }
 823                 }
 824                 # Give a notice if the user is editing a deleted/moved page...
 825                 if ( !$this->mTitle->exists() ) {
 826                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle->getPrefixedText(),
 827                                 '', array( 'lim' => 10,
 828                                            'conds' => array( "log_action != 'revision'" ),
 829                                            'showIfEmpty' => false,
 830                                            'msgKey' => array( 'recreate-moveddeleted-warn') )
 831                         );
 832                 }
 833         }
 834
 835         /**
 836          * Attempt to show a custom editing introduction, if supplied
 837          *
 838          * @return bool
 839          */
 840         protected function showCustomIntro() {
 841                 if ( $this->editintro ) {
 842                         $title = Title::newFromText( $this->editintro );
 843                         if ( $title instanceof Title && $title->exists() && $title->userCanRead() ) {
 844                                 global $wgOut;
 845                                 // Added using template syntax, to take <noinclude>'s into account.
 846                                 $wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
 847                                 return true;
 848                         } else {
 849                                 return false;
 850                         }
 851                 } else {
 852                         return false;
 853                 }
 854         }
 855
 856         /**
 857          * Attempt submission (no UI)
 858          *
 859          * @param $result
 860          * @param $bot bool
 861          *
 862          * @return Status object, possibly with a message, but always with one of the AS_* constants in $status->value,
 863          *
 864          * FIXME: This interface is TERRIBLE, but hard to get rid of due to various error display idiosyncrasies. There are
 865          * also lots of cases where error metadata is set in the object and retrieved later instead of being returned, e.g.
 866          * AS_CONTENT_TOO_BIG and AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some time.
 867          */
 868         function internalAttemptSave( &$result, $bot = false ) {
 869                 global $wgFilterCallback, $wgUser, $wgRequest, $wgParser;
 870                 global $wgMaxArticleSize;
 871
 872                 $status = Status::newGood();
 873
 874                 wfProfileIn( __METHOD__  );
 875                 wfProfileIn( __METHOD__ . '-checks' );
 876
 877                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
 878                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
 879                         $status->fatal( 'hookaborted' );
 880                         $status->value = self::AS_HOOK_ERROR;
 881                         wfProfileOut( __METHOD__ . '-checks' );
 882                         wfProfileOut( __METHOD__  );
 883                         return $status;
 884                 }
 885
 886                 # Check image redirect
 887                 if ( $this->mTitle->getNamespace() == NS_FILE &&
 888                         Title::newFromRedirect( $this->textbox1 ) instanceof Title &&
 889                         !$wgUser->isAllowed( 'upload' ) ) {
 890                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
 891                                 $status->setResult( false, $code );
 892
 893                                 wfProfileOut( __METHOD__ . '-checks' );
 894
 895                                 wfProfileOut( __METHOD__  );
 896
 897                                 return $status;
 898                 }
 899
 900                 # Check for spam
 901                 $match = self::matchSummarySpamRegex( $this->summary );
 902                 if ( $match === false ) {
 903                         $match = self::matchSpamRegex( $this->textbox1 );
 904                 }
 905                 if ( $match !== false ) {
 906                         $result['spam'] = $match;
 907                         $ip = $wgRequest->getIP();
 908                         $pdbk = $this->mTitle->getPrefixedDBkey();
 909                         $match = str_replace( "\n", '', $match );
 910                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
 911                         $status->fatal( 'spamprotectionmatch', $match );
 912                         $status->value = self::AS_SPAM_ERROR;
 913                         wfProfileOut( __METHOD__ . '-checks' );
 914                         wfProfileOut( __METHOD__ );
 915                         return $status;
 916                 }
 917                 if ( $wgFilterCallback && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
 918                         # Error messages or other handling should be performed by the filter function
 919                         $status->setResult( false, self::AS_FILTERING );
 920                         wfProfileOut( __METHOD__ . '-checks' );
 921                         wfProfileOut( __METHOD__ );
 922                         return $status;
 923                 }
 924                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
 925                         # Error messages etc. could be handled within the hook...
 926                         $status->fatal( 'hookaborted' );
 927                         $status->value = self::AS_HOOK_ERROR;
 928                         wfProfileOut( __METHOD__ . '-checks' );
 929                         wfProfileOut( __METHOD__ );
 930                         return $status;
 931                 } elseif ( $this->hookError != '' ) {
 932                         # ...or the hook could be expecting us to produce an error
 933                         $status->fatal( 'hookaborted' );
 934                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
 935                         wfProfileOut( __METHOD__ . '-checks' );
 936                         wfProfileOut( __METHOD__ );
 937                         return $status;
 938                 }
 939                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
 940                         # Check block state against master, thus 'false'.
 941                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
 942                         wfProfileOut( __METHOD__ . '-checks' );
 943                         wfProfileOut( __METHOD__ );
 944                         return $status;
 945                 }
 946                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
 947                 if ( $this->kblength > $wgMaxArticleSize ) {
 948                         // Error will be displayed by showEditForm()
 949                         $this->tooBig = true;
 950                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
 951                         wfProfileOut( __METHOD__ . '-checks' );
 952                         wfProfileOut( __METHOD__ );
 953                         return $status;
 954                 }
 955
 956                 if ( !$wgUser->isAllowed( 'edit' ) ) {
 957                         if ( $wgUser->isAnon() ) {
 958                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
 959                                 wfProfileOut( __METHOD__ . '-checks' );
 960                                 wfProfileOut( __METHOD__ );
 961                                 return $status;
 962                         } else {
 963                                 $status->fatal( 'readonlytext' );
 964                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
 965                                 wfProfileOut( __METHOD__ . '-checks' );
 966                                 wfProfileOut( __METHOD__ );
 967                                 return $status;
 968                         }
 969                 }
 970
 971                 if ( wfReadOnly() ) {
 972                         $status->fatal( 'readonlytext' );
 973                         $status->value = self::AS_READ_ONLY_PAGE;
 974                         wfProfileOut( __METHOD__ . '-checks' );
 975                         wfProfileOut( __METHOD__ );
 976                         return $status;
 977                 }
 978                 if ( $wgUser->pingLimiter() ) {
 979                         $status->fatal( 'actionthrottledtext' );
 980                         $status->value = self::AS_RATE_LIMITED;
 981                         wfProfileOut( __METHOD__ . '-checks' );
 982                         wfProfileOut( __METHOD__ );
 983                         return $status;
 984                 }
 985
 986                 # If the article has been deleted while editing, don't save it without
 987                 # confirmation
 988                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
 989                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
 990                         wfProfileOut( __METHOD__ . '-checks' );
 991                         wfProfileOut( __METHOD__ );
 992                         return $status;
 993                 }
 994
 995                 wfProfileOut( __METHOD__ . '-checks' );
 996
 997                 # If article is new, insert it.
 998                 $aid = $this->mTitle->getArticleID( Title::GAID_FOR_UPDATE );
 999                 $new = ( $aid == 0 );
1000
1001                 if ( $new ) {
1002                         // Late check for create permission, just in case *PARANOIA*
1003                         if ( !$this->mTitle->userCan( 'create' ) ) {
1004                                 $status->fatal( 'nocreatetext' );
1005                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1006                                 wfDebug( __METHOD__ . ": no create permission\n" );
1007                                 wfProfileOut( __METHOD__ );
1008                                 return $status;
1009                         }
1010
1011                         # Don't save a new article if it's blank.
1012                         if ( $this->textbox1 == '' ) {
1013                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1014                                 wfProfileOut( __METHOD__ );
1015                                 return $status;
1016                         }
1017
1018                         // Run post-section-merge edit filter
1019                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
1020                                 # Error messages etc. could be handled within the hook...
1021                                 $status->fatal( 'hookaborted' );
1022                                 $status->value = self::AS_HOOK_ERROR;
1023                                 wfProfileOut( __METHOD__ );
1024                                 return $status;
1025                         } elseif ( $this->hookError != '' ) {
1026                                 # ...or the hook could be expecting us to produce an error
1027                                 $status->fatal( 'hookaborted' );
1028                                 $status->value = self::AS_HOOK_ERROR_EXPECTED;
1029                                 wfProfileOut( __METHOD__ );
1030                                 return $status;
1031                         }
1032
1033                         # Handle the user preference to force summaries here. Check if it's not a redirect.
1034                         if ( !$this->allowBlankSummary && !Title::newFromRedirect( $this->textbox1 ) ) {
1035                                 if ( md5( $this->summary ) == $this->autoSumm ) {
1036                                         $this->missingSummary = true;
1037                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1038                                         $status->value = self::AS_SUMMARY_NEEDED;
1039                                         wfProfileOut( __METHOD__ );
1040                                         return $status;
1041                                 }
1042                         }
1043
1044                         $text = $this->textbox1;
1045                         if ( $this->section == 'new' && $this->summary != '' ) {
1046                                 $text = wfMsgForContent( 'newsectionheaderdefaultlevel', $this->summary ) . "\n\n" . $text;
1047                         }
1048
1049                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1050
1051                 } else {
1052
1053                         # Article exists. Check for edit conflict.
1054
1055                         $this->mArticle->clear(); # Force reload of dates, etc.
1056
1057                         wfDebug( "timestamp: {$this->mArticle->getTimestamp()}, edittime: {$this->edittime}\n" );
1058
1059                         if ( $this->mArticle->getTimestamp() != $this->edittime ) {
1060                                 $this->isConflict = true;
1061                                 if ( $this->section == 'new' ) {
1062                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1063                                                 $this->mArticle->getComment() == $this->summary ) {
1064                                                 // Probably a duplicate submission of a new comment.
1065                                                 // This can happen when squid resends a request after
1066                                                 // a timeout but the first one actually went through.
1067                                                 wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
1068                                         } else {
1069                                                 // New comment; suppress conflict.
1070                                                 $this->isConflict = false;
1071                                                 wfDebug( __METHOD__ .": conflict suppressed; new section\n" );
1072                                         }
1073                                 } elseif ( $this->section == '' && $this->userWasLastToEdit( $wgUser->getId(), $this->edittime ) ) {
1074                                         # Suppress edit conflict with self, except for section edits where merging is required.
1075                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1076                                         $this->isConflict = false;
1077                                 }
1078                         }
1079
1080                         if ( $this->isConflict ) {
1081                                 wfDebug( __METHOD__ . ": conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
1082                                         $this->mArticle->getTimestamp() . "')\n" );
1083                                 $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime );
1084                         } else {
1085                                 wfDebug( __METHOD__ . ": getting section '$this->section'\n" );
1086                                 $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary );
1087                         }
1088                         if ( is_null( $text ) ) {
1089                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1090                                 $this->isConflict = true;
1091                                 $text = $this->textbox1; // do not try to merge here!
1092                         } elseif ( $this->isConflict ) {
1093                                 # Attempt merge
1094                                 if ( $this->mergeChangesInto( $text ) ) {
1095                                         // Successful merge! Maybe we should tell the user the good news?
1096                                         $this->isConflict = false;
1097                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1098                                 } else {
1099                                         $this->section = '';
1100                                         $this->textbox1 = $text;
1101                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1102                                 }
1103                         }
1104
1105                         if ( $this->isConflict ) {
1106                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1107                                 wfProfileOut( __METHOD__ );
1108                                 return $status;
1109                         }
1110
1111                         // Run post-section-merge edit filter
1112                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$this->hookError, $this->summary ) ) ) {
1113                                 # Error messages etc. could be handled within the hook...
1114                                 $status->fatal( 'hookaborted' );
1115                                 $status->value = self::AS_HOOK_ERROR;
1116                                 wfProfileOut( __METHOD__ );
1117                                 return $status;
1118                         } elseif ( $this->hookError != '' ) {
1119                                 # ...or the hook could be expecting us to produce an error
1120                                 $status->fatal( 'hookaborted' );
1121                                 $status->value = self::AS_HOOK_ERROR_EXPECTED;
1122                                 wfProfileOut( __METHOD__ );
1123                                 return $status;
1124                         }
1125
1126                         # Handle the user preference to force summaries here, but not for null edits
1127                         if ( $this->section != 'new' && !$this->allowBlankSummary
1128                                 && 0 != strcmp( $this->mArticle->getContent(), $text )
1129                                 && !Title::newFromRedirect( $text ) ) # check if it's not a redirect
1130                         {
1131                                 if ( md5( $this->summary ) == $this->autoSumm ) {
1132                                         $this->missingSummary = true;
1133                                         wfProfileOut( __METHOD__ );
1134                                         return self::AS_SUMMARY_NEEDED;
1135                                 }
1136                         }
1137
1138                         # And a similar thing for new sections
1139                         if ( $this->section == 'new' && !$this->allowBlankSummary ) {
1140                                 if ( trim( $this->summary ) == '' ) {
1141                                         $this->missingSummary = true;
1142                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1143                                         $status->value = self::AS_SUMMARY_NEEDED;
1144                                         wfProfileOut( __METHOD__ );
1145                                         return $status;
1146                                 }
1147                         }
1148
1149                         # All's well
1150                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1151                         $sectionanchor = '';
1152                         if ( $this->section == 'new' ) {
1153                                 if ( $this->textbox1 == '' ) {
1154                                         $this->missingComment = true;
1155                                         $status->fatal( 'missingcommenttext' );
1156                                         $status->value = self::AS_TEXTBOX_EMPTY;
1157                                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1158                                         wfProfileOut( __METHOD__ );
1159                                         return $status;
1160                                 }
1161                                 if ( $this->summary != '' ) {
1162                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1163                                         # This is a new section, so create a link to the new section
1164                                         # in the revision summary.
1165                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1166                                         $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1167                                 }
1168                         } elseif ( $this->section != '' ) {
1169                                 # Try to get a section anchor from the section source, redirect to edited section if header found
1170                                 # XXX: might be better to integrate this into Article::replaceSection
1171                                 # for duplicate heading checking and maybe parsing
1172                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1173                                 # we can't deal with anchors, includes, html etc in the header for now,
1174                                 # headline would need to be parsed to improve this
1175                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1176                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1177                                 }
1178                         }
1179                         $result['sectionanchor'] = $sectionanchor;
1180                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1181
1182                         // Save errors may fall down to the edit form, but we've now
1183                         // merged the section into full text. Clear the section field
1184                         // so that later submission of conflict forms won't try to
1185                         // replace that into a duplicated mess.
1186                         $this->textbox1 = $text;
1187                         $this->section = '';
1188
1189                         $status->value = self::AS_SUCCESS_UPDATE;
1190                 }
1191
1192                 // Check for length errors again now that the section is merged in
1193                 $this->kblength = (int)( strlen( $text ) / 1024 );
1194                 if ( $this->kblength > $wgMaxArticleSize ) {
1195                         $this->tooBig = true;
1196                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1197                         wfProfileOut( __METHOD__ );
1198                         return $status;
1199                 }
1200
1201                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1202                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1203                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1204                         ( $bot ? EDIT_FORCE_BOT : 0 );
1205
1206                 $doEditStatus = $this->mArticle->doEdit( $text, $this->summary, $flags );
1207
1208                 if ( $doEditStatus->isOK() ) {
1209                         $result['redirect'] = Title::newFromRedirect( $text ) !== null;
1210                         $this->commitWatch();
1211                         wfProfileOut( __METHOD__ );
1212                         return $status;
1213                 } else {
1214                         $this->isConflict = true;
1215                         $doEditStatus->value = self::AS_END; // Destroys data doEdit() put in $status->value but who cares
1216                         wfProfileOut( __METHOD__ );
1217                         return $doEditStatus;
1218                 }
1219         }
1220
1221         /**
1222          * Commit the change of watch status
1223          */
1224         protected function commitWatch() {
1225                 global $wgUser;
1226                 if ( $this->watchthis xor $this->mTitle->userIsWatching() ) {
1227                         $dbw = wfGetDB( DB_MASTER );
1228                         $dbw->begin();
1229                         if ( $this->watchthis ) {
1230                                 WatchAction::doWatch( $this->mTitle, $wgUser );
1231                         } else {
1232                                 WatchAction::doUnwatch( $this->mTitle, $wgUser );
1233                         }
1234                         $dbw->commit();
1235                 }
1236         }
1237
1238         /**
1239          * Check if no edits were made by other users since
1240          * the time a user started editing the page. Limit to
1241          * 50 revisions for the sake of performance.
1242          *
1243          * @param $id int
1244          * @param $edittime string
1245          *
1246          * @return bool
1247          */
1248         protected function userWasLastToEdit( $id, $edittime ) {
1249                 if( !$id ) return false;
1250                 $dbw = wfGetDB( DB_MASTER );
1251                 $res = $dbw->select( 'revision',
1252                         'rev_user',
1253                         array(
1254                                 'rev_page' => $this->mArticle->getId(),
1255                                 'rev_timestamp > '.$dbw->addQuotes( $dbw->timestamp($edittime) )
1256                         ),
1257                         __METHOD__,
1258                         array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
1259                 foreach ( $res as $row ) {
1260                         if( $row->rev_user != $id ) {
1261                                 return false;
1262                         }
1263                 }
1264                 return true;
1265         }
1266
1267         /**
1268          * Check given input text against $wgSpamRegex, and return the text of the first match.
1269          *
1270          * @param $text string
1271          *
1272          * @return string|false matching string or false
1273          */
1274         public static function matchSpamRegex( $text ) {
1275                 global $wgSpamRegex;
1276                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1277                 $regexes = (array)$wgSpamRegex;
1278                 return self::matchSpamRegexInternal( $text, $regexes );
1279         }
1280
1281         /**
1282          * Check given input text against $wgSpamRegex, and return the text of the first match.
1283          *
1284          * @parma $text string
1285          *
1286          * @return string|false  matching string or false
1287          */
1288         public static function matchSummarySpamRegex( $text ) {
1289                 global $wgSummarySpamRegex;
1290                 $regexes = (array)$wgSummarySpamRegex;
1291                 return self::matchSpamRegexInternal( $text, $regexes );
1292         }
1293
1294         /**
1295          * @param $text string
1296          * @param $regexes array
1297          * @return bool|string
1298          */
1299         protected static function matchSpamRegexInternal( $text, $regexes ) {
1300                 foreach( $regexes as $regex ) {
1301                         $matches = array();
1302                         if( preg_match( $regex, $text, $matches ) ) {
1303                                 return $matches[0];
1304                         }
1305                 }
1306                 return false;
1307         }
1308
1309         /**
1310          * Initialise form fields in the object
1311          * Called on the first invocation, e.g. when a user clicks an edit link
1312          * @return bool -- if the requested section is valid
1313          */
1314         function initialiseForm() {
1315                 global $wgUser;
1316                 $this->edittime = $this->mArticle->getTimestamp();
1317                 $this->textbox1 = $this->getContent( false );
1318                 // activate checkboxes if user wants them to be always active
1319                 # Sort out the "watch" checkbox
1320                 if ( $wgUser->getOption( 'watchdefault' ) ) {
1321                         # Watch all edits
1322                         $this->watchthis = true;
1323                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
1324                         # Watch creations
1325                         $this->watchthis = true;
1326                 } elseif ( $this->mTitle->userIsWatching() ) {
1327                         # Already watched
1328                         $this->watchthis = true;
1329                 }
1330                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
1331                         $this->minoredit = true;
1332                 }
1333                 if ( $this->textbox1 === false ) {
1334                         return false;
1335                 }
1336                 wfProxyCheck();
1337                 return true;
1338         }
1339
1340         function setHeaders() {
1341                 global $wgOut;
1342                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1343                 if ( $this->formtype == 'preview' ) {
1344                         $wgOut->setPageTitleActionText( wfMsg( 'preview' ) );
1345                 }
1346                 if ( $this->isConflict ) {
1347                         $wgOut->setPageTitle( wfMsg( 'editconflict', $this->getContextTitle()->getPrefixedText() ) );
1348                 } elseif ( $this->section != '' ) {
1349                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1350                         $wgOut->setPageTitle( wfMsg( $msg, $this->getContextTitle()->getPrefixedText() ) );
1351                 } else {
1352                         # Use the title defined by DISPLAYTITLE magic word when present
1353                         if ( isset( $this->mParserOutput )
1354                          && ( $dt = $this->mParserOutput->getDisplayTitle() ) !== false ) {
1355                                 $title = $dt;
1356                         } else {
1357                                 $title = $this->getContextTitle()->getPrefixedText();
1358                         }
1359                         $wgOut->setPageTitle( wfMsg( 'editing', $title ) );
1360                 }
1361         }
1362
1363         /**
1364          * Send the edit form and related headers to $wgOut
1365          * @param $formCallback Callback that takes an OutputPage parameter; will be called
1366          *     during form output near the top, for captchas and the like.
1367          */
1368         function showEditForm( $formCallback = null ) {
1369                 global $wgOut, $wgUser, $wgEnableInterwikiTranscluding, $wgEnableInterwikiTemplatesTracking;
1370
1371                 wfProfileIn( __METHOD__ );
1372
1373                 #need to parse the preview early so that we know which templates are used,
1374                 #otherwise users with "show preview after edit box" will get a blank list
1375                 #we parse this near the beginning so that setHeaders can do the title
1376                 #setting work instead of leaving it in getPreviewText
1377                 $previewOutput = '';
1378                 if ( $this->formtype == 'preview' ) {
1379                         $previewOutput = $this->getPreviewText();
1380                 }
1381
1382                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) );
1383
1384                 $this->setHeaders();
1385
1386                 # Enabled article-related sidebar, toplinks, etc.
1387                 $wgOut->setArticleRelated( true );
1388
1389                 if ( $this->showHeader() === false ) {
1390                         wfProfileOut( __METHOD__ );
1391                         return;
1392                 }
1393
1394                 $action = htmlspecialchars( $this->getActionURL( $this->getContextTitle() ) );
1395
1396                 if ( $wgUser->getOption( 'showtoolbar' ) and !$this->isCssJsSubpage ) {
1397                         # prepare toolbar for edit buttons
1398                         $toolbar = EditPage::getEditToolbar();
1399                 } else {
1400                         $toolbar = '';
1401                 }
1402
1403                 $wgOut->addHTML( $this->editFormPageTop );
1404
1405                 if ( $wgUser->getOption( 'previewontop' ) ) {
1406                         $this->displayPreviewArea( $previewOutput, true );
1407                 }
1408
1409                 $wgOut->addHTML( $this->editFormTextTop );
1410
1411                 $templates = $this->getTemplates();
1412                 $formattedtemplates = Linker::formatTemplates( $templates, $this->preview, $this->section != '');
1413
1414                 $distantTemplates = $this->getDistantTemplates();
1415                 $formattedDistantTemplates = Linker::formatDistantTemplates( $distantTemplates, $this->preview, $this->section != '' );
1416
1417                 $hiddencats = $this->mArticle->getHiddenCategories();
1418                 $formattedhiddencats = Linker::formatHiddenCategories( $hiddencats );
1419
1420                 if ( $this->wasDeletedSinceLastEdit() && 'save' != $this->formtype ) {
1421                         $wgOut->wrapWikiMsg(
1422                                 "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
1423                                 'deletedwhileediting' );
1424                 } elseif ( $this->wasDeletedSinceLastEdit() ) {
1425                         // Hide the toolbar and edit area, user can click preview to get it back
1426                         // Add an confirmation checkbox and explanation.
1427                         $toolbar = '';
1428                         // @todo move this to a cleaner conditional instead of blanking a variable
1429                 }
1430                 $wgOut->addHTML( <<<HTML
1431 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1432 HTML
1433 );
1434
1435                 if ( is_callable( $formCallback ) ) {
1436                         call_user_func_array( $formCallback, array( &$wgOut ) );
1437                 }
1438
1439                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1440
1441                 // Put these up at the top to ensure they aren't lost on early form submission
1442                 $this->showFormBeforeText();
1443
1444                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
1445                         $username = $this->lastDelete->user_name;
1446                         $comment = $this->lastDelete->log_comment;
1447
1448                         // It is better to not parse the comment at all than to have templates expanded in the middle
1449                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
1450                         $key = $comment === ''
1451                                 ? 'confirmrecreate-noreason'
1452                                 : 'confirmrecreate';
1453                         $wgOut->addHTML(
1454                                 '<div class="mw-confirm-recreate">' .
1455                                 wfMsgExt( $key, 'parseinline', $username, "<nowiki>$comment</nowiki>" ) .
1456                                 Xml::checkLabel( wfMsg( 'recreate' ), 'wpRecreate', 'wpRecreate', false,
1457                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
1458                                 ) .
1459                                 '</div>'
1460                         );
1461                 }
1462
1463                 # If a blank edit summary was previously provided, and the appropriate
1464                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1465                 # user being bounced back more than once in the event that a summary
1466                 # is not required.
1467                 #####
1468                 # For a bit more sophisticated detection of blank summaries, hash the
1469                 # automatic one and pass that in the hidden field wpAutoSummary.
1470                 if ( $this->missingSummary ||
1471                         ( $this->section == 'new' && $this->nosummary ) )
1472                                 $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
1473                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1474                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
1475
1476                 $wgOut->addHTML( Html::hidden( 'oldid', $this->mArticle->getOldID() ) );
1477
1478                 if ( $this->section == 'new' ) {
1479                         $this->showSummaryInput( true, $this->summary );
1480                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
1481                 }
1482
1483                 $wgOut->addHTML( $this->editFormTextBeforeContent );
1484
1485                 $wgOut->addHTML( $toolbar );
1486
1487                 if ( $this->isConflict ) {
1488                         // In an edit conflict bypass the overrideable content form method
1489                         // and fallback to the raw wpTextbox1 since editconflicts can't be
1490                         // resolved between page source edits and custom ui edits using the
1491                         // custom edit ui.
1492                         $this->showTextbox1( null, $this->getContent() );
1493                 } else {
1494                         $this->showContentForm();
1495                 }
1496
1497                 $wgOut->addHTML( $this->editFormTextAfterContent );
1498
1499                 $wgOut->addWikiText( $this->getCopywarn() );
1500                 if ( isset($this->editFormTextAfterWarn) && $this->editFormTextAfterWarn !== '' )
1501                         $wgOut->addHTML( $this->editFormTextAfterWarn );
1502
1503                 $this->showStandardInputs();
1504
1505                 $this->showFormAfterText();
1506
1507                 $this->showTosSummary();
1508                 $this->showEditTools();
1509
1510                 $wgOut->addHTML( <<<HTML
1511 {$this->editFormTextAfterTools}
1512 <div class='templatesUsed'>
1513 {$formattedtemplates}
1514 </div>
1515 HTML
1516 );
1517
1518                 if ( $wgEnableInterwikiTranscluding && $wgEnableInterwikiTemplatesTracking ) {
1519                                         $wgOut->addHTML( <<<HTML
1520 {$this->editFormTextAfterTools}
1521 <div class='distantTemplatesUsed'>
1522 {$formattedDistantTemplates}
1523 </div>
1524 HTML
1525 );
1526                 }
1527
1528                 $wgOut->addHTML( <<<HTML
1529 {$this->editFormTextAfterTools}
1530 <div class='hiddencats'>
1531 {$formattedhiddencats}
1532 </div>
1533 HTML
1534 );
1535
1536                 if ( $this->isConflict )
1537                         $this->showConflict();
1538
1539                 $wgOut->addHTML( $this->editFormTextBottom );
1540                 $wgOut->addHTML( "</form>\n" );
1541                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1542                         $this->displayPreviewArea( $previewOutput, false );
1543                 }
1544
1545                 wfProfileOut( __METHOD__ );
1546         }
1547
1548         protected function showHeader() {
1549                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
1550                 if ( $this->isConflict ) {
1551                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
1552                         $this->edittime = $this->mArticle->getTimestamp();
1553                 } else {
1554                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
1555                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
1556                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
1557                                 // Someone is welcome to try refactoring though
1558                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
1559                                 return false;
1560                         }
1561
1562                         if ( $this->section != '' && $this->section != 'new' ) {
1563                                 $matches = array();
1564                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
1565                                         preg_match( "/^(=+)(.+)\\1/mi", $this->textbox1, $matches );
1566                                         if ( !empty( $matches[2] ) ) {
1567                                                 global $wgParser;
1568                                                 $this->summary = "/* " .
1569                                                         $wgParser->stripSectionName(trim($matches[2])) .
1570                                                         " */ ";
1571                                         }
1572                                 }
1573                         }
1574
1575                         if ( $this->missingComment ) {
1576                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
1577                         }
1578
1579                         if ( $this->missingSummary && $this->section != 'new' ) {
1580                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
1581                         }
1582
1583                         if ( $this->missingSummary && $this->section == 'new' ) {
1584                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
1585                         }
1586
1587                         if ( $this->hookError !== '' ) {
1588                                 $wgOut->addWikiText( $this->hookError );
1589                         }
1590
1591                         if ( !$this->checkUnicodeCompliantBrowser() ) {
1592                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
1593                         }
1594
1595                         if ( isset( $this->mArticle ) && isset( $this->mArticle->mRevision ) ) {
1596                         // Let sysop know that this will make private content public if saved
1597
1598                                 if ( !$this->mArticle->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1599                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
1600                                 } elseif ( $this->mArticle->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1601                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
1602                                 }
1603
1604                                 if ( !$this->mArticle->mRevision->isCurrent() ) {
1605                                         $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
1606                                         $wgOut->addWikiMsg( 'editingold' );
1607                                 }
1608                         }
1609                 }
1610
1611                 if ( wfReadOnly() ) {
1612                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
1613                 } elseif ( $wgUser->isAnon() ) {
1614                         if ( $this->formtype != 'preview' ) {
1615                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
1616                         } else {
1617                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
1618                         }
1619                 } else {
1620                         if ( $this->isCssJsSubpage ) {
1621                                 # Check the skin exists
1622                                 if ( $this->isWrongCaseCssJsPage ) {
1623                                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $this->getContextTitle()->getSkinFromCssJsSubpage() ) );
1624                                 }
1625                                 if ( $this->formtype !== 'preview' ) {
1626                                         if ( $this->isCssSubpage )
1627                                                 $wgOut->wrapWikiMsg( "<div id='mw-usercssyoucanpreview'>\n$1\n</div>", array( 'usercssyoucanpreview' ) );
1628                                         if ( $this->isJsSubpage )
1629                                                 $wgOut->wrapWikiMsg( "<div id='mw-userjsyoucanpreview'>\n$1\n</div>", array( 'userjsyoucanpreview' ) );
1630                                 }
1631                         }
1632                 }
1633
1634                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
1635                         # Is the title semi-protected?
1636                         if ( $this->mTitle->isSemiProtected() ) {
1637                                 $noticeMsg = 'semiprotectedpagewarning';
1638                         } else {
1639                                 # Then it must be protected based on static groups (regular)
1640                                 $noticeMsg = 'protectedpagewarning';
1641                         }
1642                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle->getPrefixedText(), '',
1643                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
1644                 }
1645                 if ( $this->mTitle->isCascadeProtected() ) {
1646                         # Is this page under cascading protection from some source pages?
1647                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
1648                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
1649                         $cascadeSourcesCount = count( $cascadeSources );
1650                         if ( $cascadeSourcesCount > 0 ) {
1651                                 # Explain, and list the titles responsible
1652                                 foreach( $cascadeSources as $page ) {
1653                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
1654                                 }
1655                         }
1656                         $notice .= '</div>';
1657                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
1658                 }
1659                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
1660                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle->getPrefixedText(), '',
1661                                 array(  'lim' => 1,
1662                                         'showIfEmpty' => false,
1663                                         'msgKey' => array( 'titleprotectedwarning' ),
1664                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
1665                 }
1666
1667                 if ( $this->kblength === false ) {
1668                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1669                 }
1670
1671                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
1672                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
1673                                 array( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) ) );
1674                 } else {
1675                         if( !wfMessage('longpage-hint')->isDisabled() ) {
1676                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
1677                                         array( 'longpage-hint', $wgLang->formatSize( strlen( $this->textbox1 ) ), strlen( $this->textbox1 ) )
1678                                 );
1679                         }
1680                 }
1681         }
1682
1683         /**
1684          * Standard summary input and label (wgSummary), abstracted so EditPage
1685          * subclasses may reorganize the form.
1686          * Note that you do not need to worry about the label's for=, it will be
1687          * inferred by the id given to the input. You can remove them both by
1688          * passing array( 'id' => false ) to $userInputAttrs.
1689          *
1690          * @param $summary string The value of the summary input
1691          * @param $labelText string The html to place inside the label
1692          * @param $inputAttrs array of attrs to use on the input
1693          * @param $spanLabelAttrs array of attrs to use on the span inside the label
1694          *
1695          * @return array An array in the format array( $label, $input )
1696          */
1697         function getSummaryInput($summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null) {
1698                 //Note: the maxlength is overriden in JS to 250 and to make it use UTF-8 bytes, not characters.
1699                 $inputAttrs = ( is_array($inputAttrs) ? $inputAttrs : array() ) + array(
1700                         'id' => 'wpSummary',
1701                         'maxlength' => '200',
1702                         'tabindex' => '1',
1703                         'size' => 60,
1704                         'spellcheck' => 'true',
1705                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
1706
1707                 $spanLabelAttrs = ( is_array($spanLabelAttrs) ? $spanLabelAttrs : array() ) + array(
1708                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
1709                         'id' => "wpSummaryLabel"
1710                 );
1711
1712                 $label = null;
1713                 if ( $labelText ) {
1714                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
1715                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
1716                 }
1717
1718                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
1719
1720                 return array( $label, $input );
1721         }
1722
1723         /**
1724          * @param $isSubjectPreview Boolean: true if this is the section subject/title
1725          *                          up top, or false if this is the comment summary
1726          *                          down below the textarea
1727          * @param $summary String: The text of the summary to display
1728          * @return String
1729          */
1730         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
1731                 global $wgOut, $wgContLang;
1732                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
1733                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
1734                 if ( $isSubjectPreview ) {
1735                         if ( $this->nosummary ) {
1736                                 return;
1737                         }
1738                 } else {
1739                         if ( !$this->mShowSummaryField ) {
1740                                 return;
1741                         }
1742                 }
1743                 $summary = $wgContLang->recodeForEdit( $summary );
1744                 $labelText = wfMsgExt( $isSubjectPreview ? 'subject' : 'summary', 'parseinline' );
1745                 list($label, $input) = $this->getSummaryInput($summary, $labelText, array( 'class' => $summaryClass ), array());
1746                 $wgOut->addHTML("{$label} {$input}");
1747         }
1748
1749         /**
1750          * @param $isSubjectPreview Boolean: true if this is the section subject/title
1751          *                          up top, or false if this is the comment summary
1752          *                          down below the textarea
1753          * @param $summary String: the text of the summary to display
1754          * @return String
1755          */
1756         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
1757                 if ( !$summary || ( !$this->preview && !$this->diff ) )
1758                         return "";
1759
1760                 global $wgParser;
1761
1762                 if ( $isSubjectPreview )
1763                         $summary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $summary ) );
1764
1765                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
1766
1767                 $summary = wfMsgExt( $message, 'parseinline' ) . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
1768                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
1769         }
1770
1771         protected function showFormBeforeText() {
1772                 global $wgOut;
1773                 $section = htmlspecialchars( $this->section );
1774                 $wgOut->addHTML( <<<HTML
1775 <input type='hidden' value="{$section}" name="wpSection" />
1776 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
1777 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
1778 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
1779
1780 HTML
1781                 );
1782                 if ( !$this->checkUnicodeCompliantBrowser() )
1783                         $wgOut->addHTML(Html::hidden( 'safemode', '1' ));
1784         }
1785
1786         protected function showFormAfterText() {
1787                 global $wgOut, $wgUser;
1788                 /**
1789                  * To make it harder for someone to slip a user a page
1790                  * which submits an edit form to the wiki without their
1791                  * knowledge, a random token is associated with the login
1792                  * session. If it's not passed back with the submission,
1793                  * we won't save the page, or render user JavaScript and
1794                  * CSS previews.
1795                  *
1796                  * For anon editors, who may not have a session, we just
1797                  * include the constant suffix to prevent editing from
1798                  * broken text-mangling proxies.
1799                  */
1800                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->editToken() ) . "\n" );
1801         }
1802
1803         /**
1804          * Subpage overridable method for printing the form for page content editing
1805          * By default this simply outputs wpTextbox1
1806          * Subclasses can override this to provide a custom UI for editing;
1807          * be it a form, or simply wpTextbox1 with a modified content that will be
1808          * reverse modified when extracted from the post data.
1809          * Note that this is basically the inverse for importContentFormData
1810          */
1811         protected function showContentForm() {
1812                 $this->showTextbox1();
1813         }
1814
1815         /**
1816          * Method to output wpTextbox1
1817          * The $textoverride method can be used by subclasses overriding showContentForm
1818          * to pass back to this method.
1819          *
1820          * @param $customAttribs An array of html attributes to use in the textarea
1821          * @param $textoverride String: optional text to override $this->textarea1 with
1822          */
1823         protected function showTextbox1($customAttribs = null, $textoverride = null) {
1824                 $classes = array(); // Textarea CSS
1825                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
1826                         # Is the title semi-protected?
1827                         if ( $this->mTitle->isSemiProtected() ) {
1828                                 $classes[] = 'mw-textarea-sprotected';
1829                         } else {
1830                                 # Then it must be protected based on static groups (regular)
1831                                 $classes[] = 'mw-textarea-protected';
1832                         }
1833                         # Is the title cascade-protected?
1834                         if ( $this->mTitle->isCascadeProtected() ) {
1835                                 $classes[] = 'mw-textarea-cprotected';
1836                         }
1837                 }
1838                 $attribs = array( 'tabindex' => 1 );
1839                 if ( is_array($customAttribs) )
1840                         $attribs += $customAttribs;
1841
1842                 if ( $this->wasDeletedSinceLastEdit() )
1843                         $attribs['type'] = 'hidden';
1844                 if ( !empty( $classes ) ) {
1845                         if ( isset($attribs['class']) )
1846                                 $classes[] = $attribs['class'];
1847                         $attribs['class'] = implode( ' ', $classes );
1848                 }
1849
1850                 $this->showTextbox( isset($textoverride) ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
1851         }
1852
1853         protected function showTextbox2() {
1854                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
1855         }
1856
1857         protected function showTextbox( $content, $name, $customAttribs = array() ) {
1858                 global $wgOut, $wgUser;
1859
1860                 $wikitext = $this->safeUnicodeOutput( $content );
1861                 if ( $wikitext !== '' ) {
1862                         // Ensure there's a newline at the end, otherwise adding lines
1863                         // is awkward.
1864                         // But don't add a newline if the ext is empty, or Firefox in XHTML
1865                         // mode will show an extra newline. A bit annoying.
1866                         $wikitext .= "\n";
1867                 }
1868
1869                 $attribs = $customAttribs + array(
1870                         'accesskey' => ',',
1871                         'id'   => $name,
1872                         'cols' => $wgUser->getIntOption( 'cols' ),
1873                         'rows' => $wgUser->getIntOption( 'rows' ),
1874                         'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
1875                 );
1876
1877                 $pageLang = $this->mTitle->getPageLanguage();
1878                 $attribs['lang'] = $pageLang->getCode();
1879                 $attribs['dir'] = $pageLang->getDir();
1880
1881                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
1882         }
1883
1884         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
1885                 global $wgOut;
1886                 $classes = array();
1887                 if ( $isOnTop )
1888                         $classes[] = 'ontop';
1889
1890                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
1891
1892                 if ( $this->formtype != 'preview' )
1893                         $attribs['style'] = 'display: none;';
1894
1895                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
1896
1897                 if ( $this->formtype == 'preview' ) {
1898                         $this->showPreview( $previewOutput );
1899                 }
1900
1901                 $wgOut->addHTML( '</div>' );
1902
1903                 if ( $this->formtype == 'diff') {
1904                         $this->showDiff();
1905                 }
1906         }
1907
1908         /**
1909          * Append preview output to $wgOut.
1910          * Includes category rendering if this is a category page.
1911          *
1912          * @param $text String: the HTML to be output for the preview.
1913          */
1914         protected function showPreview( $text ) {
1915                 global $wgOut;
1916                 if ( $this->mTitle->getNamespace() == NS_CATEGORY) {
1917                         $this->mArticle->openShowCategory();
1918                 }
1919                 # This hook seems slightly odd here, but makes things more
1920                 # consistent for extensions.
1921                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
1922                 $wgOut->addHTML( $text );
1923                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
1924                         $this->mArticle->closeShowCategory();
1925                 }
1926         }
1927
1928         /**
1929          * Give a chance for site and per-namespace customizations of
1930          * terms of service summary link that might exist separately
1931          * from the copyright notice.
1932          *
1933          * This will display between the save button and the edit tools,
1934          * so should remain short!
1935          */
1936         protected function showTosSummary() {
1937                 $msg = 'editpage-tos-summary';
1938                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
1939                 if( !wfMessage( $msg )->isDisabled() ) {
1940                         global $wgOut;
1941                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
1942                         $wgOut->addWikiMsg( $msg );
1943                         $wgOut->addHTML( '</div>' );
1944                 }
1945         }
1946
1947         protected function showEditTools() {
1948                 global $wgOut;
1949                 $wgOut->addHTML( '<div class="mw-editTools">' .
1950                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
1951                         '</div>' );
1952         }
1953
1954         protected function getCopywarn() {
1955                 global $wgRightsText;
1956                 if ( $wgRightsText ) {
1957                         $copywarnMsg = array( 'copyrightwarning',
1958                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
1959                                 $wgRightsText );
1960                 } else {
1961                         $copywarnMsg = array( 'copyrightwarning2',
1962                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
1963                 }
1964                 // Allow for site and per-namespace customization of contribution/copyright notice.
1965                 wfRunHooks( 'EditPageCopyrightWarning', array( $this->mTitle, &$copywarnMsg ) );
1966
1967                 return "<div id=\"editpage-copywarn\">\n" .
1968                         call_user_func_array("wfMsgNoTrans", $copywarnMsg) . "\n</div>";
1969         }
1970
1971         protected function showStandardInputs( &$tabindex = 2 ) {
1972                 global $wgOut;
1973                 $wgOut->addHTML( "<div class='editOptions'>\n" );
1974
1975                 if ( $this->section != 'new' ) {
1976                         $this->showSummaryInput( false, $this->summary );
1977                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
1978                 }
1979
1980                 $checkboxes = $this->getCheckboxes( $tabindex,
1981                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
1982                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
1983                 $wgOut->addHTML( "<div class='editButtons'>\n" );
1984                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
1985
1986                 $cancel = $this->getCancelLink();
1987                 if ( $cancel !== '' ) {
1988                         $cancel .= wfMsgExt( 'pipe-separator' , 'escapenoentities' );
1989                 }
1990                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ) );
1991                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
1992                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
1993                         htmlspecialchars( wfMsg( 'newwindow' ) );
1994                 $wgOut->addHTML( "      <span class='editHelp'>{$cancel}{$edithelp}</span>\n" );
1995                 $wgOut->addHTML( "</div><!-- editButtons -->\n</div><!-- editOptions -->\n" );
1996         }
1997
1998         /**
1999          * Show an edit conflict. textbox1 is already shown in showEditForm().
2000          * If you want to use another entry point to this function, be careful.
2001          */
2002         protected function showConflict() {
2003                 global $wgOut;
2004                 $this->textbox2 = $this->textbox1;
2005                 $this->textbox1 = $this->getContent();
2006                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
2007                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2008
2009                         $de = new DifferenceEngine( $this->mTitle );
2010                         $de->setText( $this->textbox2, $this->textbox1 );
2011                         $de->showDiff( wfMsg( "yourtext" ), wfMsg( "storedversion" ) );
2012
2013                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2014                         $this->showTextbox2();
2015                 }
2016         }
2017
2018         protected function getLastDelete() {
2019                 $dbr = wfGetDB( DB_SLAVE );
2020                 $data = $dbr->selectRow(
2021                         array( 'logging', 'user' ),
2022                         array( 'log_type',
2023                                    'log_action',
2024                                    'log_timestamp',
2025                                    'log_user',
2026                                    'log_namespace',
2027                                    'log_title',
2028                                    'log_comment',
2029                                    'log_params',
2030                                    'log_deleted',
2031                                    'user_name' ),
2032                         array( 'log_namespace' => $this->mTitle->getNamespace(),
2033                                    'log_title' => $this->mTitle->getDBkey(),
2034                                    'log_type' => 'delete',
2035                                    'log_action' => 'delete',
2036                                    'user_id=log_user' ),
2037                         __METHOD__,
2038                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
2039                 );
2040                 // Quick paranoid permission checks...
2041                 if( is_object( $data ) ) {
2042                         if( $data->log_deleted & LogPage::DELETED_USER )
2043                                 $data->user_name = wfMsgHtml( 'rev-deleted-user' );
2044                         if( $data->log_deleted & LogPage::DELETED_COMMENT )
2045                                 $data->log_comment = wfMsgHtml( 'rev-deleted-comment' );
2046                 }
2047                 return $data;
2048         }
2049
2050         /**
2051          * Get the rendered text for previewing.
2052          * @return string
2053          */
2054         function getPreviewText() {
2055                 global $wgOut, $wgUser, $wgParser;
2056
2057                 wfProfileIn( __METHOD__ );
2058
2059                 if ( $this->mTriedSave && !$this->mTokenOk ) {
2060                         if ( $this->mTokenOkExceptSuffix ) {
2061                                 $note = wfMsg( 'token_suffix_mismatch' );
2062                         } else {
2063                                 $note = wfMsg( 'session_fail_preview' );
2064                         }
2065                 } elseif ( $this->incompleteForm ) {
2066                         $note = wfMsg( 'edit_form_incomplete' );
2067                 } else {
2068                         $note = wfMsg( 'previewnote' );
2069                 }
2070
2071                 $parserOptions = ParserOptions::newFromUser( $wgUser );
2072                 $parserOptions->setEditSection( false );
2073                 $parserOptions->setIsPreview( true );
2074                 $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
2075
2076                 global $wgRawHtml;
2077                 if ( $wgRawHtml && !$this->mTokenOk ) {
2078                         // Could be an offsite preview attempt. This is very unsafe if
2079                         // HTML is enabled, as it could be an attack.
2080                         $parsedNote = '';
2081                         if ( $this->textbox1 !== '' ) {
2082                                 // Do not put big scary notice, if previewing the empty
2083                                 // string, which happens when you initially edit
2084                                 // a category page, due to automatic preview-on-open.
2085                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
2086                                         wfMsg( 'session_fail_preview_html' ) . "</div>", true, /* interface */true );
2087                         }
2088                         wfProfileOut( __METHOD__ );
2089                         return $parsedNote;
2090                 }
2091
2092                 # don't parse non-wikitext pages, show message about preview
2093                 # XXX: stupid php bug won't let us use $this->getContextTitle()->isCssJsSubpage() here -- This note has been there since r3530. Sure the bug was fixed time ago?
2094
2095                 if ( $this->isCssJsSubpage || !$this->mTitle->isWikitextPage() ) {
2096                         if( $this->mTitle->isCssJsSubpage() ) {
2097                                 $level = 'user';
2098                         } elseif( $this->mTitle->isCssOrJsPage() ) {
2099                                 $level = 'site';
2100                         } else {
2101                                 $level = false;
2102                         }
2103
2104                         # Used messages to make sure grep find them:
2105                         # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
2106                         if( $level ) {
2107                                 if (preg_match( "/\\.css$/", $this->mTitle->getText() ) ) {
2108                                         $previewtext = "<div id='mw-{$level}csspreview'>\n" . wfMsg( "{$level}csspreview" ) . "\n</div>";
2109                                         $class = "mw-code mw-css";
2110                                 } elseif (preg_match( "/\\.js$/", $this->mTitle->getText() ) ) {
2111                                         $previewtext = "<div id='mw-{$level}jspreview'>\n" . wfMsg( "{$level}jspreview" ) . "\n</div>";
2112                                         $class = "mw-code mw-js";
2113                                 } else {
2114                                         throw new MWException( 'A CSS/JS (sub)page but which is not css nor js!' );
2115                                 }
2116                         }
2117
2118                         $parserOptions->setTidy( true );
2119                         $parserOutput = $wgParser->parse( $previewtext, $this->mTitle, $parserOptions );
2120                         $previewHTML = $parserOutput->mText;
2121                         $previewHTML .= "<pre class=\"$class\" dir=\"ltr\">\n" . htmlspecialchars( $this->textbox1 ) . "\n</pre>\n";
2122                 } else {
2123                         $rt = Title::newFromRedirectArray( $this->textbox1 );
2124                         if ( $rt ) {
2125                                 $previewHTML = $this->mArticle->viewRedirect( $rt, false );
2126                         } else {
2127                                 $toparse = $this->textbox1;
2128
2129                                 # If we're adding a comment, we need to show the
2130                                 # summary as the headline
2131                                 if ( $this->section == "new" && $this->summary != "" ) {
2132                                         $toparse = "== {$this->summary} ==\n\n" . $toparse;
2133                                 }
2134
2135                                 wfRunHooks( 'EditPageGetPreviewText', array( $this, &$toparse ) );
2136
2137                                 $parserOptions->setTidy( true );
2138                                 $parserOptions->enableLimitReport();
2139                                 $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ),
2140                                         $this->mTitle, $parserOptions );
2141
2142                                 $previewHTML = $parserOutput->getText();
2143                                 $this->mParserOutput = $parserOutput;
2144                                 $wgOut->addParserOutputNoText( $parserOutput );
2145
2146                                 if ( count( $parserOutput->getWarnings() ) ) {
2147                                         $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
2148                                 }
2149                         }
2150                 }
2151
2152                 if( $this->isConflict ) {
2153                         $conflict = '<h2 id="mw-previewconflict">' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
2154                 } else {
2155                         $conflict = '<hr />';
2156                 }
2157
2158                 $previewhead = "<div class='previewnote'>\n" .
2159                         '<h2 id="mw-previewheader">' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>" .
2160                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
2161
2162                 $pageLang = $this->mTitle->getPageLanguage();
2163                 $attribs = array( 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
2164                         'class' => 'mw-content-'.$pageLang->getDir() );
2165                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
2166
2167                 wfProfileOut( __METHOD__ );
2168                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
2169         }
2170
2171         /**
2172          * @return Array
2173          */
2174         function getTemplates() {
2175                 if ( $this->preview || $this->section != '' ) {
2176                         $templates = array();
2177                         if ( !isset( $this->mParserOutput ) ) {
2178                                 return $templates;
2179                         }
2180                         foreach( $this->mParserOutput->getTemplates() as $ns => $template) {
2181                                 foreach( array_keys( $template ) as $dbk ) {
2182                                         $templates[] = Title::makeTitle($ns, $dbk);
2183                                 }
2184                         }
2185                         return $templates;
2186                 } else {
2187                         return $this->mArticle->getUsedTemplates();
2188                 }
2189         }
2190
2191         function getDistantTemplates() {
2192                 global $wgEnableInterwikiTemplatesTracking;
2193                 if ( !$wgEnableInterwikiTemplatesTracking ) {
2194                         return array( );
2195                 }
2196                 if ( $this->preview || $this->section != '' ) {
2197                         $templates = array();
2198                         if ( !isset( $this->mParserOutput ) ) return $templates;
2199                         $templatesList = $this->mParserOutput->getDistantTemplates();
2200                         foreach( $templatesList as $prefix => $templatesbyns ) {
2201                                 foreach( $templatesbyns as $ns => $template ) {
2202                                         foreach( array_keys( $template ) as $dbk ) {
2203                                                 $templates[] = Title::makeTitle( $ns, $dbk, null, $prefix );
2204                                         }
2205                                 }
2206                         }
2207                         return $templates;
2208                 } else {
2209                         return $this->mArticle->getUsedDistantTemplates();
2210                 }
2211         }
2212
2213         /**
2214          * Call the stock "user is blocked" page
2215          */
2216         function blockedPage() {
2217                 global $wgOut;
2218                 $wgOut->blockedPage( false ); # Standard block notice on the top, don't 'return'
2219
2220                 # If the user made changes, preserve them when showing the markup
2221                 # (This happens when a user is blocked during edit, for instance)
2222                 $first = $this->firsttime || ( !$this->save && $this->textbox1 == '' );
2223                 if ( $first ) {
2224                         $source = $this->mTitle->exists() ? $this->getContent() : false;
2225                 } else {
2226                         $source = $this->textbox1;
2227                 }
2228
2229                 # Spit out the source or the user's modified version
2230                 if ( $source !== false ) {
2231                         $wgOut->addHTML( '<hr />' );
2232                         $wgOut->addWikiMsg( $first ? 'blockedoriginalsource' : 'blockededitsource', $this->mTitle->getPrefixedText() );
2233                         $this->showTextbox1( array( 'readonly' ), $source );
2234                 }
2235         }
2236
2237         /**
2238          * Produce the stock "please login to edit pages" page
2239          */
2240         function userNotLoggedInPage() {
2241                 global $wgOut;
2242
2243                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
2244                 $loginLink = Linker::linkKnown(
2245                         $loginTitle,
2246                         wfMsgHtml( 'loginreqlink' ),
2247                         array(),
2248                         array( 'returnto' => $this->getContextTitle()->getPrefixedText() )
2249                 );
2250
2251                 $wgOut->setPageTitle( wfMsg( 'whitelistedittitle' ) );
2252                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2253                 $wgOut->setArticleRelated( false );
2254
2255                 $wgOut->addHTML( wfMessage( 'whitelistedittext' )->rawParams( $loginLink )->parse() );
2256                 $wgOut->returnToMain( false, $this->getContextTitle() );
2257         }
2258
2259         /**
2260          * Creates a basic error page which informs the user that
2261          * they have attempted to edit a nonexistent section.
2262          */
2263         function noSuchSectionPage() {
2264                 global $wgOut;
2265
2266                 $wgOut->setPageTitle( wfMsg( 'nosuchsectiontitle' ) );
2267                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2268                 $wgOut->setArticleRelated( false );
2269
2270                 $res = wfMsgExt( 'nosuchsectiontext', 'parse', $this->section );
2271                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
2272                 $wgOut->addHTML( $res );
2273
2274                 $wgOut->returnToMain( false, $this->mTitle );
2275         }
2276
2277         /**
2278          * Produce the stock "your edit contains spam" page
2279          *
2280          * @param $match Text which triggered one or more filters
2281          * @deprecated since 1.17 Use method spamPageWithContent() instead
2282          */
2283         static function spamPage( $match = false ) {
2284                 global $wgOut, $wgTitle;
2285
2286                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
2287                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2288                 $wgOut->setArticleRelated( false );
2289
2290                 $wgOut->addHTML( '<div id="spamprotected">' );
2291                 $wgOut->addWikiMsg( 'spamprotectiontext' );
2292                 if ( $match ) {
2293                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
2294                 }
2295                 $wgOut->addHTML( '</div>' );
2296
2297                 $wgOut->returnToMain( false, $wgTitle );
2298         }
2299
2300         /**
2301          * Show "your edit contains spam" page with your diff and text
2302          *
2303          * @param $match Text which triggered one or more filters
2304          */
2305         public function spamPageWithContent( $match = false ) {
2306                 global $wgOut;
2307                 $this->textbox2 = $this->textbox1;
2308
2309                 $wgOut->setPageTitle( wfMsg( 'spamprotectiontitle' ) );
2310                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2311                 $wgOut->setArticleRelated( false );
2312
2313                 $wgOut->addHTML( '<div id="spamprotected">' );
2314                 $wgOut->addWikiMsg( 'spamprotectiontext' );
2315                 if ( $match ) {
2316                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
2317                 }
2318                 $wgOut->addHTML( '</div>' );
2319
2320                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2321                 $de = new DifferenceEngine( $this->mTitle );
2322                 $de->setText( $this->getContent(), $this->textbox2 );
2323                 $de->showDiff( wfMsg( "storedversion" ), wfMsg( "yourtext" ) );
2324
2325                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2326                 $this->showTextbox2();
2327
2328                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
2329         }
2330
2331
2332         /**
2333          * @private
2334          * @todo document
2335          *
2336          * @parma $editText string
2337          *
2338          * @return bool
2339          */
2340         function mergeChangesInto( &$editText ){
2341                 wfProfileIn( __METHOD__ );
2342
2343                 $db = wfGetDB( DB_MASTER );
2344
2345                 // This is the revision the editor started from
2346                 $baseRevision = $this->getBaseRevision();
2347                 if ( is_null( $baseRevision ) ) {
2348                         wfProfileOut( __METHOD__ );
2349                         return false;
2350                 }
2351                 $baseText = $baseRevision->getText();
2352
2353                 // The current state, we want to merge updates into it
2354                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
2355                 if ( is_null( $currentRevision ) ) {
2356                         wfProfileOut( __METHOD__ );
2357                         return false;
2358                 }
2359                 $currentText = $currentRevision->getText();
2360
2361                 $result = '';
2362                 if ( wfMerge( $baseText, $editText, $currentText, $result ) ) {
2363                         $editText = $result;
2364                         wfProfileOut( __METHOD__ );
2365                         return true;
2366                 } else {
2367                         wfProfileOut( __METHOD__ );
2368                         return false;
2369                 }
2370         }
2371
2372         /**
2373          * Check if the browser is on a blacklist of user-agents known to
2374          * mangle UTF-8 data on form submission. Returns true if Unicode
2375          * should make it through, false if it's known to be a problem.
2376          * @return bool
2377          * @private
2378          */
2379         function checkUnicodeCompliantBrowser() {
2380                 global $wgBrowserBlackList;
2381                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
2382                         // No User-Agent header sent? Trust it by default...
2383                         return true;
2384                 }
2385                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
2386                 foreach ( $wgBrowserBlackList as $browser ) {
2387                         if ( preg_match($browser, $currentbrowser) ) {
2388                                 return false;
2389                         }
2390                 }
2391                 return true;
2392         }
2393
2394         /**
2395          * Format an anchor fragment as it would appear for a given section name
2396          * @param $text String
2397          * @return String
2398          * @private
2399          */
2400         function sectionAnchor( $text ) {
2401                 global $wgParser;
2402                 return $wgParser->guessSectionNameFromWikiText( $text );
2403         }
2404
2405         /**
2406          * Shows a bulletin board style toolbar for common editing functions.
2407          * It can be disabled in the user preferences.
2408          * The necessary JavaScript code can be found in skins/common/edit.js.
2409          *
2410          * @return string
2411          */
2412         static function getEditToolbar() {
2413                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
2414                 global $wgUseTeX, $wgEnableUploads, $wgForeignFileRepos;
2415
2416                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
2417
2418                 /**
2419                  * $toolarray is an array of arrays each of which includes the
2420                  * filename of the button image (without path), the opening
2421                  * tag, the closing tag, optionally a sample text that is
2422                  * inserted between the two when no selection is highlighted
2423                  * and.  The tip text is shown when the user moves the mouse
2424                  * over the button.
2425                  *
2426                  * Also here: accesskeys (key), which are not used yet until
2427                  * someone can figure out a way to make them work in
2428                  * IE. However, we should make sure these keys are not defined
2429                  * on the edit page.
2430                  */
2431                 $toolarray = array(
2432                         array(
2433                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
2434                                 'id'     => 'mw-editbutton-bold',
2435                                 'open'   => '\'\'\'',
2436                                 'close'  => '\'\'\'',
2437                                 'sample' => wfMsg( 'bold_sample' ),
2438                                 'tip'    => wfMsg( 'bold_tip' ),
2439                                 'key'    => 'B'
2440                         ),
2441                         array(
2442                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
2443                                 'id'     => 'mw-editbutton-italic',
2444                                 'open'   => '\'\'',
2445                                 'close'  => '\'\'',
2446                                 'sample' => wfMsg( 'italic_sample' ),
2447                                 'tip'    => wfMsg( 'italic_tip' ),
2448                                 'key'    => 'I'
2449                         ),
2450                         array(
2451                                 'image'  => $wgLang->getImageFile( 'button-link' ),
2452                                 'id'     => 'mw-editbutton-link',
2453                                 'open'   => '[[',
2454                                 'close'  => ']]',
2455                                 'sample' => wfMsg( 'link_sample' ),
2456                                 'tip'    => wfMsg( 'link_tip' ),
2457                                 'key'    => 'L'
2458                         ),
2459                         array(
2460                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
2461                                 'id'     => 'mw-editbutton-extlink',
2462                                 'open'   => '[',
2463                                 'close'  => ']',
2464                                 'sample' => wfMsg( 'extlink_sample' ),
2465                                 'tip'    => wfMsg( 'extlink_tip' ),
2466                                 'key'    => 'X'
2467                         ),
2468                         array(
2469                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
2470                                 'id'     => 'mw-editbutton-headline',
2471                                 'open'   => "\n== ",
2472                                 'close'  => " ==\n",
2473                                 'sample' => wfMsg( 'headline_sample' ),
2474                                 'tip'    => wfMsg( 'headline_tip' ),
2475                                 'key'    => 'H'
2476                         ),
2477                         $imagesAvailable ? array(
2478                                 'image'  => $wgLang->getImageFile( 'button-image' ),
2479                                 'id'     => 'mw-editbutton-image',
2480                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
2481                                 'close'  => ']]',
2482                                 'sample' => wfMsg( 'image_sample' ),
2483                                 'tip'    => wfMsg( 'image_tip' ),
2484                                 'key'    => 'D',
2485                         ) : false,
2486                         $imagesAvailable ? array(
2487                                 'image'  => $wgLang->getImageFile( 'button-media' ),
2488                                 'id'     => 'mw-editbutton-media',
2489                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
2490                                 'close'  => ']]',
2491                                 'sample' => wfMsg( 'media_sample' ),
2492                                 'tip'    => wfMsg( 'media_tip' ),
2493                                 'key'    => 'M'
2494                         ) : false,
2495                         $wgUseTeX ?     array(
2496                                 'image'  => $wgLang->getImageFile( 'button-math' ),
2497                                 'id'     => 'mw-editbutton-math',
2498                                 'open'   => "<math>",
2499                                 'close'  => "</math>",
2500                                 'sample' => wfMsg( 'math_sample' ),
2501                                 'tip'    => wfMsg( 'math_tip' ),
2502                                 'key'    => 'C'
2503                         ) : false,
2504                         array(
2505                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
2506                                 'id'     => 'mw-editbutton-nowiki',
2507                                 'open'   => "<nowiki>",
2508                                 'close'  => "</nowiki>",
2509                                 'sample' => wfMsg( 'nowiki_sample' ),
2510                                 'tip'    => wfMsg( 'nowiki_tip' ),
2511                                 'key'    => 'N'
2512                         ),
2513                         array(
2514                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
2515                                 'id'     => 'mw-editbutton-signature',
2516                                 'open'   => '--~~~~',
2517                                 'close'  => '',
2518                                 'sample' => '',
2519                                 'tip'    => wfMsg( 'sig_tip' ),
2520                                 'key'    => 'Y'
2521                         ),
2522                         array(
2523                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
2524                                 'id'     => 'mw-editbutton-hr',
2525                                 'open'   => "\n----\n",
2526                                 'close'  => '',
2527                                 'sample' => '',
2528                                 'tip'    => wfMsg( 'hr_tip' ),
2529                                 'key'    => 'R'
2530                         )
2531                 );
2532                 $toolbar = "<div id='toolbar'>\n";
2533
2534                 $script = '';
2535                 foreach ( $toolarray as $tool ) {
2536                         if ( !$tool ) {
2537                                 continue;
2538                         }
2539
2540                         $params = array(
2541                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
2542                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
2543                                 // Older browsers show a "speedtip" type message only for ALT.
2544                                 // Ideally these should be different, realistically they
2545                                 // probably don't need to be.
2546                                 $tip = $tool['tip'],
2547                                 $open = $tool['open'],
2548                                 $close = $tool['close'],
2549                                 $sample = $tool['sample'],
2550                                 $cssId = $tool['id'],
2551                         );
2552
2553                         $paramList = implode( ',',
2554                                 array_map( array( 'Xml', 'encodeJsVar' ), $params ) );
2555                         $script .= "mw.toolbar.addButton($paramList);\n";
2556                 }
2557                 $wgOut->addScript( Html::inlineScript(
2558                         "if ( window.mediaWiki ) {{$script}}"
2559                 ) );
2560
2561                 $toolbar .= "\n</div>";
2562
2563                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
2564
2565                 return $toolbar;
2566         }
2567
2568         /**
2569          * Returns an array of html code of the following checkboxes:
2570          * minor and watch
2571          *
2572          * @param $tabindex Current tabindex
2573          * @param $checked Array of checkbox => bool, where bool indicates the checked
2574          *                 status of the checkbox
2575          *
2576          * @return array
2577          */
2578         public function getCheckboxes( &$tabindex, $checked ) {
2579                 global $wgUser;
2580
2581                 $checkboxes = array();
2582
2583                 // don't show the minor edit checkbox if it's a new page or section
2584                 if ( !$this->isNew ) {
2585                         $checkboxes['minor'] = '';
2586                         $minorLabel = wfMsgExt( 'minoredit', array( 'parseinline' ) );
2587                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
2588                                 $attribs = array(
2589                                         'tabindex'  => ++$tabindex,
2590                                         'accesskey' => wfMsg( 'accesskey-minoredit' ),
2591                                         'id'        => 'wpMinoredit',
2592                                 );
2593                                 $checkboxes['minor'] =
2594                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
2595                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
2596                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
2597                                         ">{$minorLabel}</label>";
2598                         }
2599                 }
2600
2601                 $watchLabel = wfMsgExt( 'watchthis', array( 'parseinline' ) );
2602                 $checkboxes['watch'] = '';
2603                 if ( $wgUser->isLoggedIn() ) {
2604                         $attribs = array(
2605                                 'tabindex'  => ++$tabindex,
2606                                 'accesskey' => wfMsg( 'accesskey-watch' ),
2607                                 'id'        => 'wpWatchthis',
2608                         );
2609                         $checkboxes['watch'] =
2610                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
2611                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
2612                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
2613                                 ">{$watchLabel}</label>";
2614                 }
2615                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
2616                 return $checkboxes;
2617         }
2618
2619         /**
2620          * Returns an array of html code of the following buttons:
2621          * save, diff, preview and live
2622          *
2623          * @param $tabindex Current tabindex
2624          *
2625          * @return array
2626          */
2627         public function getEditButtons( &$tabindex ) {
2628                 $buttons = array();
2629
2630                 $temp = array(
2631                         'id'        => 'wpSave',
2632                         'name'      => 'wpSave',
2633                         'type'      => 'submit',
2634                         'tabindex'  => ++$tabindex,
2635                         'value'     => wfMsg( 'savearticle' ),
2636                         'accesskey' => wfMsg( 'accesskey-save' ),
2637                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
2638                 );
2639                 $buttons['save'] = Xml::element('input', $temp, '');
2640
2641                 ++$tabindex; // use the same for preview and live preview
2642                 $temp = array(
2643                         'id'        => 'wpPreview',
2644                         'name'      => 'wpPreview',
2645                         'type'      => 'submit',
2646                         'tabindex'  => $tabindex,
2647                         'value'     => wfMsg( 'showpreview' ),
2648                         'accesskey' => wfMsg( 'accesskey-preview' ),
2649                         'title'     => wfMsg( 'tooltip-preview' ) . ' [' . wfMsg( 'accesskey-preview' ) . ']',
2650                 );
2651                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
2652                 $buttons['live'] = '';
2653
2654                 $temp = array(
2655                         'id'        => 'wpDiff',
2656                         'name'      => 'wpDiff',
2657                         'type'      => 'submit',
2658                         'tabindex'  => ++$tabindex,
2659                         'value'     => wfMsg( 'showdiff' ),
2660                         'accesskey' => wfMsg( 'accesskey-diff' ),
2661                         'title'     => wfMsg( 'tooltip-diff' ) . ' [' . wfMsg( 'accesskey-diff' ) . ']',
2662                 );
2663                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
2664
2665                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
2666                 return $buttons;
2667         }
2668
2669         /**
2670          * Output preview text only. This can be sucked into the edit page
2671          * via JavaScript, and saves the server time rendering the skin as
2672          * well as theoretically being more robust on the client (doesn't
2673          * disturb the edit box's undo history, won't eat your text on
2674          * failure, etc).
2675          *
2676          * @todo This doesn't include category or interlanguage links.
2677          *       Would need to enhance it a bit, <s>maybe wrap them in XML
2678          *       or something...</s> that might also require more skin
2679          *       initialization, so check whether that's a problem.
2680          */
2681         function livePreview() {
2682                 global $wgOut;
2683                 $wgOut->disable();
2684                 header( 'Content-type: text/xml; charset=utf-8' );
2685                 header( 'Cache-control: no-cache' );
2686
2687                 $previewText = $this->getPreviewText();
2688                 #$categories = $skin->getCategoryLinks();
2689
2690                 $s =
2691                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
2692                 Xml::tags( 'livepreview', null,
2693                         Xml::element( 'preview', null, $previewText )
2694                         #.      Xml::element( 'category', null, $categories )
2695                 );
2696                 echo $s;
2697         }
2698
2699         /**
2700          * @return string
2701          */
2702         public function getCancelLink() {
2703                 $cancelParams = array();
2704                 if ( !$this->isConflict && $this->mArticle->getOldID() > 0 ) {
2705                         $cancelParams['oldid'] = $this->mArticle->getOldID();
2706                 }
2707
2708                 return Linker::linkKnown(
2709                         $this->getContextTitle(),
2710                         wfMsgExt( 'cancel', array( 'parseinline' ) ),
2711                         array( 'id' => 'mw-editform-cancel' ),
2712                         $cancelParams
2713                 );
2714         }
2715
2716         /**
2717          * Get a diff between the current contents of the edit box and the
2718          * version of the page we're editing from.
2719          *
2720          * If this is a section edit, we'll replace the section as for final
2721          * save and then make a comparison.
2722          */
2723         function showDiff() {
2724                 $oldtext = $this->mArticle->fetchContent();
2725                 $newtext = $this->mArticle->replaceSection(
2726                         $this->section, $this->textbox1, $this->summary, $this->edittime );
2727
2728                 wfRunHooks( 'EditPageGetDiffText', array( $this, &$newtext ) );
2729
2730                 $newtext = $this->mArticle->preSaveTransform( $newtext );
2731                 $oldtitle = wfMsgExt( 'currentrev', array( 'parseinline' ) );
2732                 $newtitle = wfMsgExt( 'yourtext', array( 'parseinline' ) );
2733                 if ( $oldtext !== false  || $newtext != '' ) {
2734                         $de = new DifferenceEngine( $this->mTitle );
2735                         $de->setText( $oldtext, $newtext );
2736                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2737                         $de->showDiffStyle();
2738                 } else {
2739                         $difftext = '';
2740                 }
2741
2742                 global $wgOut;
2743                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2744         }
2745
2746         /**
2747          * Filter an input field through a Unicode de-armoring process if it
2748          * came from an old browser with known broken Unicode editing issues.
2749          *
2750          * @param $request WebRequest
2751          * @param $field String
2752          * @return String
2753          * @private
2754          */
2755         function safeUnicodeInput( $request, $field ) {
2756                 $text = rtrim( $request->getText( $field ) );
2757                 return $request->getBool( 'safemode' )
2758                         ? $this->unmakesafe( $text )
2759                         : $text;
2760         }
2761
2762         /**
2763          * @param $request WebRequest
2764          * @param $text string
2765          * @return string
2766          */
2767         function safeUnicodeText( $request, $text ) {
2768                 $text = rtrim( $text );
2769                 return $request->getBool( 'safemode' )
2770                         ? $this->unmakesafe( $text )
2771                         : $text;
2772         }
2773
2774         /**
2775          * Filter an output field through a Unicode armoring process if it is
2776          * going to an old browser with known broken Unicode editing issues.
2777          *
2778          * @param $text String
2779          * @return String
2780          * @private
2781          */
2782         function safeUnicodeOutput( $text ) {
2783                 global $wgContLang;
2784                 $codedText = $wgContLang->recodeForEdit( $text );
2785                 return $this->checkUnicodeCompliantBrowser()
2786                         ? $codedText
2787                         : $this->makesafe( $codedText );
2788         }
2789
2790         /**
2791          * A number of web browsers are known to corrupt non-ASCII characters
2792          * in a UTF-8 text editing environment. To protect against this,
2793          * detected browsers will be served an armored version of the text,
2794          * with non-ASCII chars converted to numeric HTML character references.
2795          *
2796          * Preexisting such character references will have a 0 added to them
2797          * to ensure that round-trips do not alter the original data.
2798          *
2799          * @param $invalue String
2800          * @return String
2801          * @private
2802          */
2803         function makesafe( $invalue ) {
2804                 // Armor existing references for reversability.
2805                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
2806
2807                 $bytesleft = 0;
2808                 $result = "";
2809                 $working = 0;
2810                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2811                         $bytevalue = ord( $invalue[$i] );
2812                         if ( $bytevalue <= 0x7F ) { //0xxx xxxx
2813                                 $result .= chr( $bytevalue );
2814                                 $bytesleft = 0;
2815                         } elseif ( $bytevalue <= 0xBF ) { //10xx xxxx
2816                                 $working = $working << 6;
2817                                 $working += ($bytevalue & 0x3F);
2818                                 $bytesleft--;
2819                                 if ( $bytesleft <= 0 ) {
2820                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
2821                                 }
2822                         } elseif ( $bytevalue <= 0xDF ) { //110x xxxx
2823                                 $working = $bytevalue & 0x1F;
2824                                 $bytesleft = 1;
2825                         } elseif ( $bytevalue <= 0xEF ) { //1110 xxxx
2826                                 $working = $bytevalue & 0x0F;
2827                                 $bytesleft = 2;
2828                         } else { //1111 0xxx
2829                                 $working = $bytevalue & 0x07;
2830                                 $bytesleft = 3;
2831                         }
2832                 }
2833                 return $result;
2834         }
2835
2836         /**
2837          * Reverse the previously applied transliteration of non-ASCII characters
2838          * back to UTF-8. Used to protect data from corruption by broken web browsers
2839          * as listed in $wgBrowserBlackList.
2840          *
2841          * @param $invalue String
2842          * @return String
2843          * @private
2844          */
2845         function unmakesafe( $invalue ) {
2846                 $result = "";
2847                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2848                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i+3] != '0' ) ) {
2849                                 $i += 3;
2850                                 $hexstring = "";
2851                                 do {
2852                                         $hexstring .= $invalue[$i];
2853                                         $i++;
2854                                 } while( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
2855
2856                                 // Do some sanity checks. These aren't needed for reversability,
2857                                 // but should help keep the breakage down if the editor
2858                                 // breaks one of the entities whilst editing.
2859                                 if ( (substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6) ) {
2860                                         $codepoint = hexdec($hexstring);
2861                                         $result .= codepointToUtf8( $codepoint );
2862                                 } else {
2863                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
2864                                 }
2865                         } else {
2866                                 $result .= substr( $invalue, $i, 1 );
2867                         }
2868                 }
2869                 // reverse the transform that we made for reversability reasons.
2870                 return strtr( $result, array( "&#x0" => "&#x" ) );
2871         }
2872
2873         function noCreatePermission() {
2874                 global $wgOut;
2875                 $wgOut->setPageTitle( wfMsg( 'nocreatetitle' ) );
2876                 $wgOut->addWikiMsg( 'nocreatetext' );
2877         }
2878
2879         /**
2880          * Attempt submission
2881          * @return bool false if output is done, true if the rest of the form should be displayed
2882          */
2883         function attemptSave() {
2884                 global $wgUser, $wgOut;
2885
2886                 $resultDetails = false;
2887                 # Allow bots to exempt some edits from bot flagging
2888                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
2889                 $status = $this->internalAttemptSave( $resultDetails, $bot );
2890                 // FIXME: once the interface for internalAttemptSave() is made nicer, this should use the message in $status
2891
2892                 if ( $status->value == self::AS_SUCCESS_UPDATE || $status->value == self::AS_SUCCESS_NEW_ARTICLE ) {
2893                         $this->didSave = true;
2894                 }
2895
2896                 switch ( $status->value ) {
2897                         case self::AS_HOOK_ERROR_EXPECTED:
2898                         case self::AS_CONTENT_TOO_BIG:
2899                         case self::AS_ARTICLE_WAS_DELETED:
2900                         case self::AS_CONFLICT_DETECTED:
2901                         case self::AS_SUMMARY_NEEDED:
2902                         case self::AS_TEXTBOX_EMPTY:
2903                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
2904                         case self::AS_END:
2905                                 return true;
2906
2907                         case self::AS_HOOK_ERROR:
2908                         case self::AS_FILTERING:
2909                                 return false;
2910
2911                         case self::AS_SUCCESS_NEW_ARTICLE:
2912                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
2913                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) );
2914                                 return false;
2915
2916                         case self::AS_SUCCESS_UPDATE:
2917                                 $extraQuery = '';
2918                                 $sectionanchor = $resultDetails['sectionanchor'];
2919
2920                                 // Give extensions a chance to modify URL query on update
2921                                 wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this->mArticle, &$sectionanchor, &$extraQuery ) );
2922
2923                                 if ( $resultDetails['redirect'] ) {
2924                                         if ( $extraQuery == '' ) {
2925                                                 $extraQuery = 'redirect=no';
2926                                         } else {
2927                                                 $extraQuery = 'redirect=no&' . $extraQuery;
2928                                         }
2929                                 }
2930                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
2931                                 return false;
2932
2933                         case self::AS_SPAM_ERROR:
2934                                 $this->spamPageWithContent( $resultDetails['spam'] );
2935                                 return false;
2936
2937                         case self::AS_BLOCKED_PAGE_FOR_USER:
2938                                 $this->blockedPage();
2939                                 return false;
2940
2941                         case self::AS_IMAGE_REDIRECT_ANON:
2942                                 $wgOut->showErrorPage( 'uploadnologin', 'uploadnologintext' );
2943                                 return false;
2944
2945                         case self::AS_READ_ONLY_PAGE_ANON:
2946                                 $this->userNotLoggedInPage();
2947                                 return false;
2948
2949                         case self::AS_READ_ONLY_PAGE_LOGGED:
2950                         case self::AS_READ_ONLY_PAGE:
2951                                 $wgOut->readOnlyPage();
2952                                 return false;
2953
2954                         case self::AS_RATE_LIMITED:
2955                                 $wgOut->rateLimited();
2956                                 return false;
2957
2958                         case self::AS_NO_CREATE_PERMISSION:
2959                                 $this->noCreatePermission();
2960                                 return false;
2961
2962                         case self::AS_BLANK_ARTICLE:
2963                                 $wgOut->redirect( $this->getContextTitle()->getFullURL() );
2964                                 return false;
2965
2966                         case self::AS_IMAGE_REDIRECT_LOGGED:
2967                                 $wgOut->permissionRequired( 'upload' );
2968                                 return false;
2969                 }
2970         }
2971
2972         /**
2973          * @return Revision
2974          */
2975         function getBaseRevision() {
2976                 if ( !$this->mBaseRevision ) {
2977                         $db = wfGetDB( DB_MASTER );
2978                         $baseRevision = Revision::loadFromTimestamp(
2979                                 $db, $this->mTitle, $this->edittime );
2980                         return $this->mBaseRevision = $baseRevision;
2981                 } else {
2982                         return $this->mBaseRevision;
2983                 }
2984         }
2985 }