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