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