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