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