includes/EditPage.php

   1 <?php
   2 /**
   3  * Contains the EditPage class
   4  * @file
   5  */
   6
   7 /**
   8  * The edit page/HTML interface (split from Article)
   9  * The actual database and text munging is still in Article,
  10  * but it should get easier to call those from alternate
  11  * interfaces.
  12  *
  13  * EditPage cares about two distinct titles:
  14  * $this->mContextTitle is the page that forms submit to, links point to,
  15  * redirects go to, etc. $this->mTitle (as well as $mArticle) is the
  16  * page in the database that is actually being edited. These are
  17  * usually the same, but they are now allowed to be different.
  18  *
  19  * Surgeon General's Warning: prolonged exposure to this class is known to cause
  20  * headaches, which may be fatal.
  21  */
  22 class EditPage {
  23         const AS_SUCCESS_UPDATE            = 200;
  24         const AS_SUCCESS_NEW_ARTICLE       = 201;
  25         const AS_HOOK_ERROR                = 210;
  26         const AS_FILTERING                 = 211;
  27         const AS_HOOK_ERROR_EXPECTED       = 212;
  28         const AS_BLOCKED_PAGE_FOR_USER     = 215;
  29         const AS_CONTENT_TOO_BIG           = 216;
  30         const AS_USER_CANNOT_EDIT          = 217;
  31         const AS_READ_ONLY_PAGE_ANON       = 218;
  32         const AS_READ_ONLY_PAGE_LOGGED     = 219;
  33         const AS_READ_ONLY_PAGE            = 220;
  34         const AS_RATE_LIMITED              = 221;
  35         const AS_ARTICLE_WAS_DELETED       = 222;
  36         const AS_NO_CREATE_PERMISSION      = 223;
  37         const AS_BLANK_ARTICLE             = 224;
  38         const AS_CONFLICT_DETECTED         = 225;
  39         const AS_SUMMARY_NEEDED            = 226;
  40         const AS_TEXTBOX_EMPTY             = 228;
  41         const AS_MAX_ARTICLE_SIZE_EXCEEDED = 229;
  42         const AS_OK                        = 230;
  43         const AS_END                       = 231;
  44         const AS_SPAM_ERROR                = 232;
  45         const AS_IMAGE_REDIRECT_ANON       = 233;
  46         const AS_IMAGE_REDIRECT_LOGGED     = 234;
  47
  48         /**
  49          * @var Article
  50          */
  51         var $mArticle;
  52
  53         /**
  54          * @var Title
  55          */
  56         var $mTitle;
  57         private $mContextTitle = null;
  58         var $action = 'submit';
  59         var $isConflict = false;
  60         var $isCssJsSubpage = false;
  61         var $isCssSubpage = false;
  62         var $isJsSubpage = false;
  63         var $isWrongCaseCssJsPage = false;
  64         var $isNew = false; // new page or new section
  65         var $deletedSinceEdit;
  66         var $formtype;
  67         var $firsttime;
  68         var $lastDelete;
  69         var $mTokenOk = false;
  70         var $mTokenOkExceptSuffix = false;
  71         var $mTriedSave = false;
  72         var $incompleteForm = false;
  73         var $tooBig = false;
  74         var $kblength = false;
  75         var $missingComment = false;
  76         var $missingSummary = false;
  77         var $allowBlankSummary = false;
  78         var $autoSumm = '';
  79         var $hookError = '';
  80         #var $mPreviewTemplates;
  81
  82         /**
  83          * @var ParserOutput
  84          */
  85         var $mParserOutput;
  86
  87         var $mBaseRevision = false;
  88         var $mShowSummaryField = true;
  89
  90         # Form values
  91         var $save = false, $preview = false, $diff = false;
  92         var $minoredit = false, $watchthis = false, $recreate = false;
  93         var $textbox1 = '', $textbox2 = '', $summary = '', $nosummary = false;
  94         var $edittime = '', $section = '', $starttime = '';
  95         var $oldid = 0, $editintro = '', $scrolltop = null, $bot = true;
  96
  97         # Placeholders for text injection by hooks (must be HTML)
  98         # extensions should take care to _append_ to the present value
  99         public $editFormPageTop = ''; // Before even the preview
 100         public $editFormTextTop = '';
 101         public $editFormTextBeforeContent = '';
 102         public $editFormTextAfterWarn = '';
 103         public $editFormTextAfterTools = '';
 104         public $editFormTextBottom = '';
 105         public $editFormTextAfterContent = '';
 106         public $previewTextAfterContent = '';
 107         public $mPreloadText = '';
 108
 109         /* $didSave should be set to true whenever an article was succesfully altered. */
 110         public $didSave = false;
 111         public $undidRev = 0;
 112
 113         public $suppressIntro = false;
 114
 115         /**
 116          * @todo document
 117          * @param $article Article
 118          */
 119         public function __construct( $article ) {
 120                 $this->mArticle = $article;
 121                 $this->mTitle = $article->getTitle();
 122         }
 123
 124         /**
 125          * @return Article
 126          */
 127         public function getArticle() {
 128                 return $this->mArticle;
 129         }
 130
 131         /**
 132          * @since 1.19
 133          * @return Title
 134          */
 135         public function getTitle() {
 136                 return $this->mTitle;
 137         }
 138
 139         /**
 140          * Set the context Title object
 141          *
 142          * @param $title Title object or null
 143          */
 144         public function setContextTitle( $title ) {
 145                 $this->mContextTitle = $title;
 146         }
 147
 148         /**
 149          * Get the context title object.
 150          * If not set, $wgTitle will be returned. This behavior might changed in
 151          * the future to return $this->mTitle instead.
 152          *
 153          * @return Title object
 154          */
 155         public function getContextTitle() {
 156                 if ( is_null( $this->mContextTitle ) ) {
 157                         global $wgTitle;
 158                         return $wgTitle;
 159                 } else {
 160                         return $this->mContextTitle;
 161                 }
 162         }
 163
 164         function submit() {
 165                 $this->edit();
 166         }
 167
 168         /**
 169          * This is the function that gets called for "action=edit". It
 170          * sets up various member variables, then passes execution to
 171          * another function, usually showEditForm()
 172          *
 173          * The edit form is self-submitting, so that when things like
 174          * preview and edit conflicts occur, we get the same form back
 175          * with the extra stuff added.  Only when the final submission
 176          * is made and all is well do we actually save and redirect to
 177          * the newly-edited page.
 178          */
 179         function edit() {
 180                 global $wgOut, $wgRequest, $wgUser;
 181                 // Allow extensions to modify/prevent this form or submission
 182                 if ( !wfRunHooks( 'AlternateEdit', array( $this ) ) ) {
 183                         return;
 184                 }
 185
 186                 wfProfileIn( __METHOD__ );
 187                 wfDebug( __METHOD__.": enter\n" );
 188
 189                 // If they used redlink=1 and the page exists, redirect to the main article
 190                 if ( $wgRequest->getBool( 'redlink' ) && $this->mTitle->exists() ) {
 191                         $wgOut->redirect( $this->mTitle->getFullURL() );
 192                         wfProfileOut( __METHOD__ );
 193                         return;
 194                 }
 195
 196                 $this->importFormData( $wgRequest );
 197                 $this->firsttime = false;
 198
 199                 if ( $this->live ) {
 200                         $this->livePreview();
 201                         wfProfileOut( __METHOD__ );
 202                         return;
 203                 }
 204
 205                 if ( wfReadOnly() && $this->save ) {
 206                         // Force preview
 207                         $this->save = false;
 208                         $this->preview = true;
 209                 }
 210
 211                 if ( $this->save ) {
 212                         $this->formtype = 'save';
 213                 } elseif ( $this->preview ) {
 214                         $this->formtype = 'preview';
 215                 } elseif ( $this->diff ) {
 216                         $this->formtype = 'diff';
 217                 } else { # First time through
 218                         $this->firsttime = true;
 219                         if ( $this->previewOnOpen() ) {
 220                                 $this->formtype = 'preview';
 221                         } else {
 222                                 $this->formtype = 'initial';
 223                         }
 224                 }
 225
 226                 $permErrors = $this->getEditPermissionErrors();
 227                 if ( $permErrors ) {
 228                         wfDebug( __METHOD__ . ": User can't edit\n" );
 229                         // Auto-block user's IP if the account was "hard" blocked
 230                         $wgUser->spreadAnyEditBlock();
 231
 232                         $this->displayPermissionsError( $permErrors );
 233
 234                         wfProfileOut( __METHOD__ );
 235                         return;
 236                 }
 237
 238                 $wgOut->addModules( array( 'mediawiki.action.edit' ) );
 239
 240                 if ( $wgUser->getOption( 'uselivepreview', false ) ) {
 241                         $wgOut->addModules( 'mediawiki.legacy.preview' );
 242                 }
 243                 // Bug #19334: textarea jumps when editing articles in IE8
 244                 $wgOut->addStyle( 'common/IE80Fixes.css', 'screen', 'IE 8' );
 245
 246                 wfProfileIn( __METHOD__."-business-end" );
 247
 248                 $this->isConflict = false;
 249                 // css / js subpages of user pages get a special treatment
 250                 $this->isCssJsSubpage       = $this->mTitle->isCssJsSubpage();
 251                 $this->isCssSubpage         = $this->mTitle->isCssSubpage();
 252                 $this->isJsSubpage          = $this->mTitle->isJsSubpage();
 253                 $this->isWrongCaseCssJsPage = $this->isWrongCaseCssJsPage();
 254                 $this->isNew                = !$this->mTitle->exists() || $this->section == 'new';
 255
 256                 # Show applicable editing introductions
 257                 if ( $this->formtype == 'initial' || $this->firsttime )
 258                         $this->showIntro();
 259
 260                 if ( $this->mTitle->isTalkPage() ) {
 261                         $wgOut->addWikiMsg( 'talkpagetext' );
 262                 }
 263
 264                 # Optional notices on a per-namespace and per-page basis
 265                 $editnotice_ns   = 'editnotice-'.$this->mTitle->getNamespace();
 266                 $editnotice_ns_message = wfMessage( $editnotice_ns )->inContentLanguage();
 267                 if ( $editnotice_ns_message->exists() ) {
 268                         $wgOut->addWikiText( $editnotice_ns_message->plain() );
 269                 }
 270                 if ( MWNamespace::hasSubpages( $this->mTitle->getNamespace() ) ) {
 271                         $parts = explode( '/', $this->mTitle->getDBkey() );
 272                         $editnotice_base = $editnotice_ns;
 273                         while ( count( $parts ) > 0 ) {
 274                                 $editnotice_base .= '-'.array_shift( $parts );
 275                                 $editnotice_base_msg = wfMessage( $editnotice_base )->inContentLanguage();
 276                                 if ( $editnotice_base_msg->exists() ) {
 277                                         $wgOut->addWikiText( $editnotice_base_msg->plain()  );
 278                                 }
 279                         }
 280                 } else {
 281                         # Even if there are no subpages in namespace, we still don't want / in MW ns.
 282                         $editnoticeText = $editnotice_ns . '-' . str_replace( '/', '-', $this->mTitle->getDBkey() );
 283                         $editnoticeMsg = wfMessage( $editnoticeText )->inContentLanguage();
 284                         if ( $editnoticeMsg->exists() ) {
 285                                 $wgOut->addWikiText( $editnoticeMsg->plain() );
 286                         }
 287                 }
 288
 289                 # Attempt submission here.  This will check for edit conflicts,
 290                 # and redundantly check for locked database, blocked IPs, etc.
 291                 # that edit() already checked just in case someone tries to sneak
 292                 # in the back door with a hand-edited submission URL.
 293
 294                 if ( 'save' == $this->formtype ) {
 295                         if ( !$this->attemptSave() ) {
 296                                 wfProfileOut( __METHOD__."-business-end" );
 297                                 wfProfileOut( __METHOD__ );
 298                                 return;
 299                         }
 300                 }
 301
 302                 # First time through: get contents, set time for conflict
 303                 # checking, etc.
 304                 if ( 'initial' == $this->formtype || $this->firsttime ) {
 305                         if ( $this->initialiseForm() === false ) {
 306                                 $this->noSuchSectionPage();
 307                                 wfProfileOut( __METHOD__."-business-end" );
 308                                 wfProfileOut( __METHOD__ );
 309                                 return;
 310                         }
 311                         if ( !$this->mTitle->getArticleId() )
 312                                 wfRunHooks( 'EditFormPreloadText', array( &$this->textbox1, &$this->mTitle ) );
 313                         else
 314                                 wfRunHooks( 'EditFormInitialText', array( $this ) );
 315                 }
 316
 317                 $this->showEditForm();
 318                 wfProfileOut( __METHOD__."-business-end" );
 319                 wfProfileOut( __METHOD__ );
 320         }
 321
 322         /**
 323          * @return array
 324          */
 325         protected function getEditPermissionErrors() {
 326                 global $wgUser;
 327                 $permErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
 328                 # Can this title be created?
 329                 if ( !$this->mTitle->exists() ) {
 330                         $permErrors = array_merge( $permErrors,
 331                                 wfArrayDiff2( $this->mTitle->getUserPermissionsErrors( 'create', $wgUser ), $permErrors ) );
 332                 }
 333                 # Ignore some permissions errors when a user is just previewing/viewing diffs
 334                 $remove = array();
 335                 foreach( $permErrors as $error ) {
 336                         if ( ( $this->preview || $this->diff ) &&
 337                                 ( $error[0] == 'blockedtext' || $error[0] == 'autoblockedtext' ) )
 338                         {
 339                                 $remove[] = $error;
 340                         }
 341                 }
 342                 $permErrors = wfArrayDiff2( $permErrors, $remove );
 343                 return $permErrors;
 344         }
 345
 346         /**
 347          * Display a permissions error page, like OutputPage::showPermissionsErrorPage(),
 348          * but with the following differences:
 349          * - If redlink=1, the user will be redirect to the page
 350          * - If there is content to display or the error occurs while either saving,
 351          *   previewing or showing the difference, it will be a
 352          *   "View source for ..." page displaying the source code after the error message.
 353          *
 354          * @since 1.19
 355          * @param $permErrors Array of permissions errors, as returned by
 356          *                    Title::getUserPermissionsErrors().
 357          */
 358         protected function displayPermissionsError( array $permErrors ) {
 359                 global $wgRequest, $wgOut;
 360
 361                 if ( $wgRequest->getBool( 'redlink' ) ) {
 362                         // The edit page was reached via a red link.
 363                         // Redirect to the article page and let them click the edit tab if
 364                         // they really want a permission error.
 365                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 366                         return;
 367                 }
 368
 369                 $content = $this->getContent();
 370
 371                 # Use the normal message if there's nothing to display
 372                 if ( $this->firsttime && $content === '' ) {
 373                         $action = $this->mTitle->exists() ? 'edit' :
 374                                 ( $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage' );
 375                         throw new PermissionsError( $action, $permErrors );
 376                 }
 377
 378                 $wgOut->setPageTitle( wfMessage( 'viewsource-title', $this->getContextTitle()->getPrefixedText() ) );
 379                 $wgOut->addBacklinkSubtitle( $this->getContextTitle() );
 380                 $wgOut->addWikiText( $wgOut->formatPermissionsErrorMessage( $permErrors, 'edit' ) );
 381                 $wgOut->addHTML( "<hr />\n" );
 382
 383                 # If the user made changes, preserve them when showing the markup
 384                 # (This happens when a user is blocked during edit, for instance)
 385                 if ( !$this->firsttime ) {
 386                         $content = $this->textbox1;
 387                         $wgOut->addWikiMsg( 'viewyourtext' );
 388                 } else {
 389                         $wgOut->addWikiMsg( 'viewsourcetext' );
 390                 }
 391
 392                 $this->showTextbox( $content, 'wpTextbox1', array( 'readonly' ) );
 393
 394                 $wgOut->addHTML( Html::rawElement( 'div', array( 'class' => 'templatesUsed' ),
 395                         Linker::formatTemplates( $this->getTemplates() ) ) );
 396
 397                 if ( $this->mTitle->exists() ) {
 398                         $wgOut->returnToMain( null, $this->mTitle );
 399                 }
 400         }
 401
 402         /**
 403          * Show a read-only error
 404          * Parameters are the same as OutputPage:readOnlyPage()
 405          * Redirect to the article page if redlink=1
 406          * @deprecated in 1.19; use displayPermissionsError() instead
 407          */
 408         function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
 409                 global $wgRequest, $wgOut;
 410                 if ( $wgRequest->getBool( 'redlink' ) ) {
 411                         // The edit page was reached via a red link.
 412                         // Redirect to the article page and let them click the edit tab if
 413                         // they really want a permission error.
 414                         $wgOut->redirect( $this->mTitle->getFullUrl() );
 415                 } else {
 416                         $wgOut->readOnlyPage( $source, $protected, $reasons, $action );
 417                 }
 418         }
 419
 420         /**
 421          * Should we show a preview when the edit form is first shown?
 422          *
 423          * @return bool
 424          */
 425         protected function previewOnOpen() {
 426                 global $wgRequest, $wgUser, $wgPreviewOnOpenNamespaces;
 427                 if ( $wgRequest->getVal( 'preview' ) == 'yes' ) {
 428                         // Explicit override from request
 429                         return true;
 430                 } elseif ( $wgRequest->getVal( 'preview' ) == 'no' ) {
 431                         // Explicit override from request
 432                         return false;
 433                 } elseif ( $this->section == 'new' ) {
 434                         // Nothing *to* preview for new sections
 435                         return false;
 436                 } elseif ( ( $wgRequest->getVal( 'preload' ) !== null || $this->mTitle->exists() ) && $wgUser->getOption( 'previewonfirst' ) ) {
 437                         // Standard preference behaviour
 438                         return true;
 439                 } elseif ( !$this->mTitle->exists() &&
 440                   isset($wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()]) &&
 441                   $wgPreviewOnOpenNamespaces[$this->mTitle->getNamespace()] )
 442                 {
 443                         // Categories are special
 444                         return true;
 445                 } else {
 446                         return false;
 447                 }
 448         }
 449
 450         /**
 451          * Checks whether the user entered a skin name in uppercase,
 452          * e.g. "User:Example/Monobook.css" instead of "monobook.css"
 453          *
 454          * @return bool
 455          */
 456         protected function isWrongCaseCssJsPage() {
 457                 if( $this->mTitle->isCssJsSubpage() ) {
 458                         $name = $this->mTitle->getSkinFromCssJsSubpage();
 459                         $skins = array_merge(
 460                                 array_keys( Skin::getSkinNames() ),
 461                                 array( 'common' )
 462                         );
 463                         return !in_array( $name, $skins )
 464                                 && in_array( strtolower( $name ), $skins );
 465                 } else {
 466                         return false;
 467                 }
 468         }
 469
 470         /**
 471          * Does this EditPage class support section editing?
 472          * This is used by EditPage subclasses to indicate their ui cannot handle section edits
 473          *
 474          * @return bool
 475          */
 476         protected function isSectionEditSupported() {
 477                 return true;
 478         }
 479
 480         /**
 481          * @todo document
 482          * @param $request WebRequest
 483          */
 484         function importFormData( &$request ) {
 485                 global $wgLang, $wgUser;
 486
 487                 wfProfileIn( __METHOD__ );
 488
 489                 # Section edit can come from either the form or a link
 490                 $this->section = $request->getVal( 'wpSection', $request->getVal( 'section' ) );
 491
 492                 if ( $request->wasPosted() ) {
 493                         # These fields need to be checked for encoding.
 494                         # Also remove trailing whitespace, but don't remove _initial_
 495                         # whitespace from the text boxes. This may be significant formatting.
 496                         $this->textbox1 = $this->safeUnicodeInput( $request, 'wpTextbox1' );
 497                         if ( !$request->getCheck('wpTextbox2') ) {
 498                                 // Skip this if wpTextbox2 has input, it indicates that we came
 499                                 // from a conflict page with raw page text, not a custom form
 500                                 // modified by subclasses
 501                                 wfProfileIn( get_class($this)."::importContentFormData" );
 502                                 $textbox1 = $this->importContentFormData( $request );
 503                                 if ( isset($textbox1) )
 504                                         $this->textbox1 = $textbox1;
 505                                 wfProfileOut( get_class($this)."::importContentFormData" );
 506                         }
 507
 508                         # Truncate for whole multibyte characters. +5 bytes for ellipsis
 509                         $this->summary = $wgLang->truncate( $request->getText( 'wpSummary' ), 250 );
 510
 511                         # Remove extra headings from summaries and new sections.
 512                         $this->summary = preg_replace('/^\s*=+\s*(.*?)\s*=+\s*$/', '$1', $this->summary);
 513
 514                         $this->edittime = $request->getVal( 'wpEdittime' );
 515                         $this->starttime = $request->getVal( 'wpStarttime' );
 516
 517                         $this->scrolltop = $request->getIntOrNull( 'wpScrolltop' );
 518
 519                         if ($this->textbox1 === '' && $request->getVal( 'wpTextbox1' ) === null) {
 520                                 // wpTextbox1 field is missing, possibly due to being "too big"
 521                                 // according to some filter rules such as Suhosin's setting for
 522                                 // suhosin.request.max_value_length (d'oh)
 523                                 $this->incompleteForm = true;
 524                         } else {
 525                                 // edittime should be one of our last fields; if it's missing,
 526                                 // the submission probably broke somewhere in the middle.
 527                                 $this->incompleteForm = is_null( $this->edittime );
 528                         }
 529                         if ( $this->incompleteForm ) {
 530                                 # If the form is incomplete, force to preview.
 531                                 wfDebug( __METHOD__ . ": Form data appears to be incomplete\n" );
 532                                 wfDebug( "POST DATA: " . var_export( $_POST, true ) . "\n" );
 533                                 $this->preview = true;
 534                         } else {
 535                                 /* Fallback for live preview */
 536                                 $this->preview = $request->getCheck( 'wpPreview' ) || $request->getCheck( 'wpLivePreview' );
 537                                 $this->diff = $request->getCheck( 'wpDiff' );
 538
 539                                 // Remember whether a save was requested, so we can indicate
 540                                 // if we forced preview due to session failure.
 541                                 $this->mTriedSave = !$this->preview;
 542
 543                                 if ( $this->tokenOk( $request ) ) {
 544                                         # Some browsers will not report any submit button
 545                                         # if the user hits enter in the comment box.
 546                                         # The unmarked state will be assumed to be a save,
 547                                         # if the form seems otherwise complete.
 548                                         wfDebug( __METHOD__ . ": Passed token check.\n" );
 549                                 } elseif ( $this->diff ) {
 550                                         # Failed token check, but only requested "Show Changes".
 551                                         wfDebug( __METHOD__ . ": Failed token check; Show Changes requested.\n" );
 552                                 } else {
 553                                         # Page might be a hack attempt posted from
 554                                         # an external site. Preview instead of saving.
 555                                         wfDebug( __METHOD__ . ": Failed token check; forcing preview\n" );
 556                                         $this->preview = true;
 557                                 }
 558                         }
 559                         $this->save = !$this->preview && !$this->diff;
 560                         if ( !preg_match( '/^\d{14}$/', $this->edittime ) ) {
 561                                 $this->edittime = null;
 562                         }
 563
 564                         if ( !preg_match( '/^\d{14}$/', $this->starttime ) ) {
 565                                 $this->starttime = null;
 566                         }
 567
 568                         $this->recreate  = $request->getCheck( 'wpRecreate' );
 569
 570                         $this->minoredit = $request->getCheck( 'wpMinoredit' );
 571                         $this->watchthis = $request->getCheck( 'wpWatchthis' );
 572
 573                         # Don't force edit summaries when a user is editing their own user or talk page
 574                         if ( ( $this->mTitle->mNamespace == NS_USER || $this->mTitle->mNamespace == NS_USER_TALK ) &&
 575                                 $this->mTitle->getText() == $wgUser->getName() )
 576                         {
 577                                 $this->allowBlankSummary = true;
 578                         } else {
 579                                 $this->allowBlankSummary = $request->getBool( 'wpIgnoreBlankSummary' ) || !$wgUser->getOption( 'forceeditsummary');
 580                         }
 581
 582                         $this->autoSumm = $request->getText( 'wpAutoSummary' );
 583                 } else {
 584                         # Not a posted form? Start with nothing.
 585                         wfDebug( __METHOD__ . ": Not a posted form.\n" );
 586                         $this->textbox1  = '';
 587                         $this->summary   = '';
 588                         $this->edittime  = '';
 589                         $this->starttime = wfTimestampNow();
 590                         $this->edit      = false;
 591                         $this->preview   = false;
 592                         $this->save      = false;
 593                         $this->diff      = false;
 594                         $this->minoredit = false;
 595                         $this->watchthis = $request->getBool( 'watchthis', false ); // Watch may be overriden by request parameters
 596                         $this->recreate  = false;
 597
 598                         if ( $this->section == 'new' && $request->getVal( 'preloadtitle' ) ) {
 599                                 $this->summary = $request->getVal( 'preloadtitle' );
 600                         }
 601                         elseif ( $this->section != 'new' && $request->getVal( 'summary' ) ) {
 602                                 $this->summary = $request->getText( 'summary' );
 603                         }
 604
 605                         if ( $request->getVal( 'minor' ) ) {
 606                                 $this->minoredit = true;
 607                         }
 608                 }
 609
 610                 $this->bot = $request->getBool( 'bot', true );
 611                 $this->nosummary = $request->getBool( 'nosummary' );
 612
 613                 // @todo FIXME: Unused variable?
 614                 $this->oldid = $request->getInt( 'oldid' );
 615
 616                 $this->live = $request->getCheck( 'live' );
 617                 $this->editintro = $request->getText( 'editintro',
 618                         // Custom edit intro for new sections
 619                         $this->section === 'new' ? 'MediaWiki:addsection-editintro' : '' );
 620
 621                 // Allow extensions to modify form data
 622                 wfRunHooks( 'EditPage::importFormData', array( $this, $request ) );
 623
 624                 wfProfileOut( __METHOD__ );
 625         }
 626
 627         /**
 628          * Subpage overridable method for extracting the page content data from the
 629          * posted form to be placed in $this->textbox1, if using customized input
 630          * this method should be overrided and return the page text that will be used
 631          * for saving, preview parsing and so on...
 632          *
 633          * @param $request WebRequest
 634          */
 635         protected function importContentFormData( &$request ) {
 636                 return; // Don't do anything, EditPage already extracted wpTextbox1
 637         }
 638
 639         /**
 640          * Initialise form fields in the object
 641          * Called on the first invocation, e.g. when a user clicks an edit link
 642          * @return bool -- if the requested section is valid
 643          */
 644         function initialiseForm() {
 645                 global $wgUser;
 646                 $this->edittime = $this->mArticle->getTimestamp();
 647                 $this->textbox1 = $this->getContent( false );
 648                 // activate checkboxes if user wants them to be always active
 649                 # Sort out the "watch" checkbox
 650                 if ( $wgUser->getOption( 'watchdefault' ) ) {
 651                         # Watch all edits
 652                         $this->watchthis = true;
 653                 } elseif ( $wgUser->getOption( 'watchcreations' ) && !$this->mTitle->exists() ) {
 654                         # Watch creations
 655                         $this->watchthis = true;
 656                 } elseif ( $this->mTitle->userIsWatching() ) {
 657                         # Already watched
 658                         $this->watchthis = true;
 659                 }
 660                 if ( $wgUser->getOption( 'minordefault' ) && !$this->isNew ) {
 661                         $this->minoredit = true;
 662                 }
 663                 if ( $this->textbox1 === false ) {
 664                         return false;
 665                 }
 666                 wfProxyCheck();
 667                 return true;
 668         }
 669
 670         /**
 671          * Fetch initial editing page content.
 672          *
 673          * @param $def_text string
 674          * @return mixed string on success, $def_text for invalid sections
 675          * @private
 676          */
 677         function getContent( $def_text = '' ) {
 678                 global $wgOut, $wgRequest, $wgParser;
 679
 680                 wfProfileIn( __METHOD__ );
 681                 # Get variables from query string :P
 682                 $section = $wgRequest->getVal( 'section' );
 683
 684                 $preload = $wgRequest->getVal( 'preload',
 685                         // Custom preload text for new sections
 686                         $section === 'new' ? 'MediaWiki:addsection-preload' : '' );
 687                 $undoafter = $wgRequest->getVal( 'undoafter' );
 688                 $undo = $wgRequest->getVal( 'undo' );
 689
 690                 // For message page not locally set, use the i18n message.
 691                 // For other non-existent articles, use preload text if any.
 692                 if ( !$this->mTitle->exists() ) {
 693                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 694                                 # If this is a system message, get the default text.
 695                                 $text = $this->mTitle->getDefaultMessageText();
 696                                 if( $text === false ) {
 697                                         $text = $this->getPreloadedText( $preload );
 698                                 }
 699                         } else {
 700                                 # If requested, preload some text.
 701                                 $text = $this->getPreloadedText( $preload );
 702                         }
 703                 // For existing pages, get text based on "undo" or section parameters.
 704                 } else {
 705                         $text = $this->mArticle->getContent();
 706                         if ( $undo > 0 && $undoafter > 0 && $undo < $undoafter ) {
 707                                 # If they got undoafter and undo round the wrong way, switch them
 708                                 list( $undo, $undoafter ) = array( $undoafter, $undo );
 709                         }
 710                         if ( $undo > 0 && $undo > $undoafter ) {
 711                                 # Undoing a specific edit overrides section editing; section-editing
 712                                 # doesn't work with undoing.
 713                                 if ( $undoafter ) {
 714                                         $undorev = Revision::newFromId( $undo );
 715                                         $oldrev = Revision::newFromId( $undoafter );
 716                                 } else {
 717                                         $undorev = Revision::newFromId( $undo );
 718                                         $oldrev = $undorev ? $undorev->getPrevious() : null;
 719                                 }
 720
 721                                 # Sanity check, make sure it's the right page,
 722                                 # the revisions exist and they were not deleted.
 723                                 # Otherwise, $text will be left as-is.
 724                                 if ( !is_null( $undorev ) && !is_null( $oldrev ) &&
 725                                         $undorev->getPage() == $oldrev->getPage() &&
 726                                         $undorev->getPage() == $this->mArticle->getID() &&
 727                                         !$undorev->isDeleted( Revision::DELETED_TEXT ) &&
 728                                         !$oldrev->isDeleted( Revision::DELETED_TEXT ) ) {
 729
 730                                         $undotext = $this->mArticle->getUndoText( $undorev, $oldrev );
 731                                         if ( $undotext === false ) {
 732                                                 # Warn the user that something went wrong
 733                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-failure">' .
 734                                                         wfMsgNoTrans( 'undo-failure' ) . '</div>', true, /* interface */true );
 735                                         } else {
 736                                                 $text = $undotext;
 737                                                 # Inform the user of our success and set an automatic edit summary
 738                                                 $this->editFormPageTop .= $wgOut->parse( '<div class="mw-undo-success">' .
 739                                                         wfMsgNoTrans( 'undo-success' ) . '</div>', true, /* interface */true );
 740                                                 $firstrev = $oldrev->getNext();
 741                                                 # If we just undid one rev, use an autosummary
 742                                                 if ( $firstrev->getId() == $undo ) {
 743                                                         $undoSummary = wfMsgForContent( 'undo-summary', $undo, $undorev->getUserText() );
 744                                                         if ( $this->summary === '' ) {
 745                                                                 $this->summary = $undoSummary;
 746                                                         } else {
 747                                                                 $this->summary = $undoSummary . wfMsgForContent( 'colon-separator' ) . $this->summary;
 748                                                         }
 749                                                         $this->undidRev = $undo;
 750                                                 }
 751                                                 $this->formtype = 'diff';
 752                                         }
 753                                 } else {
 754                                         // Failed basic sanity checks.
 755                                         // Older revisions may have been removed since the link
 756                                         // was created, or we may simply have got bogus input.
 757                                         $this->editFormPageTop .= $wgOut->parse( '<div class="error mw-undo-norev">' .
 758                                                 wfMsgNoTrans( 'undo-norev' ) . '</div>', true, /* interface */true );
 759                                 }
 760                         } elseif ( $section != '' ) {
 761                                 if ( $section == 'new' ) {
 762                                         $text = $this->getPreloadedText( $preload );
 763                                 } else {
 764                                         // Get section edit text (returns $def_text for invalid sections)
 765                                         $text = $wgParser->getSection( $text, $section, $def_text );
 766                                 }
 767                         }
 768                 }
 769
 770                 wfProfileOut( __METHOD__ );
 771                 return $text;
 772         }
 773
 774         /**
 775          * Use this method before edit() to preload some text into the edit box
 776          *
 777          * @param $text string
 778          */
 779         public function setPreloadedText( $text ) {
 780                 $this->mPreloadText = $text;
 781         }
 782
 783         /**
 784          * Get the contents to be preloaded into the box, either set by
 785          * an earlier setPreloadText() or by loading the given page.
 786          *
 787          * @param $preload String: representing the title to preload from.
 788          * @return String
 789          */
 790         protected function getPreloadedText( $preload ) {
 791                 global $wgUser, $wgParser;
 792                 if ( !empty( $this->mPreloadText ) ) {
 793                         return $this->mPreloadText;
 794                 } elseif ( $preload !== '' ) {
 795                         $title = Title::newFromText( $preload );
 796                         # Check for existence to avoid getting MediaWiki:Noarticletext
 797                         if ( isset( $title ) && $title->exists() && $title->userCanRead() ) {
 798                                 $article = new Article( $title );
 799
 800                                 if ( $article->isRedirect() ) {
 801                                         $title = Title::newFromRedirectRecurse( $article->getContent() );
 802                                         # Redirects to missing titles are displayed, to hidden pages are followed
 803                                         # Copying observed behaviour from ?action=view
 804                                         if ( $title->exists() ) {
 805                                                 if ($title->userCanRead() ) {
 806                                                         $article = new Article( $title );
 807                                                 } else {
 808                                                         return "";
 809                                                 }
 810                                         }
 811                                 }
 812                                 $parserOptions = ParserOptions::newFromUser( $wgUser );
 813                                 return $wgParser->getPreloadText( $article->getContent(), $title, $parserOptions );
 814                         }
 815                 }
 816                 return '';
 817         }
 818
 819         /**
 820          * Make sure the form isn't faking a user's credentials.
 821          *
 822          * @param $request WebRequest
 823          * @return bool
 824          * @private
 825          */
 826         function tokenOk( &$request ) {
 827                 global $wgUser;
 828                 $token = $request->getVal( 'wpEditToken' );
 829                 $this->mTokenOk = $wgUser->matchEditToken( $token );
 830                 $this->mTokenOkExceptSuffix = $wgUser->matchEditTokenNoSuffix( $token );
 831                 return $this->mTokenOk;
 832         }
 833
 834         /**
 835          * Attempt submission
 836          * @return bool false if output is done, true if the rest of the form should be displayed
 837          */
 838         function attemptSave() {
 839                 global $wgUser, $wgOut;
 840
 841                 $resultDetails = false;
 842                 # Allow bots to exempt some edits from bot flagging
 843                 $bot = $wgUser->isAllowed( 'bot' ) && $this->bot;
 844                 $status = $this->internalAttemptSave( $resultDetails, $bot );
 845                 // FIXME: once the interface for internalAttemptSave() is made nicer, this should use the message in $status
 846
 847                 if ( $status->value == self::AS_SUCCESS_UPDATE || $status->value == self::AS_SUCCESS_NEW_ARTICLE ) {
 848                         $this->didSave = true;
 849                 }
 850
 851                 switch ( $status->value ) {
 852                         case self::AS_HOOK_ERROR_EXPECTED:
 853                         case self::AS_CONTENT_TOO_BIG:
 854                         case self::AS_ARTICLE_WAS_DELETED:
 855                         case self::AS_CONFLICT_DETECTED:
 856                         case self::AS_SUMMARY_NEEDED:
 857                         case self::AS_TEXTBOX_EMPTY:
 858                         case self::AS_MAX_ARTICLE_SIZE_EXCEEDED:
 859                         case self::AS_END:
 860                                 return true;
 861
 862                         case self::AS_HOOK_ERROR:
 863                         case self::AS_FILTERING:
 864                                 return false;
 865
 866                         case self::AS_SUCCESS_NEW_ARTICLE:
 867                                 $query = $resultDetails['redirect'] ? 'redirect=no' : '';
 868                                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) );
 869                                 return false;
 870
 871                         case self::AS_SUCCESS_UPDATE:
 872                                 $extraQuery = '';
 873                                 $sectionanchor = $resultDetails['sectionanchor'];
 874
 875                                 // Give extensions a chance to modify URL query on update
 876                                 wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this->mArticle, &$sectionanchor, &$extraQuery ) );
 877
 878                                 if ( $resultDetails['redirect'] ) {
 879                                         if ( $extraQuery == '' ) {
 880                                                 $extraQuery = 'redirect=no';
 881                                         } else {
 882                                                 $extraQuery = 'redirect=no&' . $extraQuery;
 883                                         }
 884                                 }
 885                                 $wgOut->redirect( $this->mTitle->getFullURL( $extraQuery ) . $sectionanchor );
 886                                 return false;
 887
 888                         case self::AS_BLANK_ARTICLE:
 889                                 $wgOut->redirect( $this->getContextTitle()->getFullURL() );
 890                                 return false;
 891
 892                         case self::AS_SPAM_ERROR:
 893                                 $this->spamPageWithContent( $resultDetails['spam'] );
 894                                 return false;
 895
 896                         case self::AS_BLOCKED_PAGE_FOR_USER:
 897                                 throw new UserBlockedError( $wgUser->mBlock );
 898
 899                         case self::AS_IMAGE_REDIRECT_ANON:
 900                         case self::AS_IMAGE_REDIRECT_LOGGED:
 901                                 throw new PermissionsError( 'upload' );
 902
 903                         case self::AS_READ_ONLY_PAGE_ANON:
 904                         case self::AS_READ_ONLY_PAGE_LOGGED:
 905                                 throw new PermissionsError( 'edit' );
 906
 907                         case self::AS_READ_ONLY_PAGE:
 908                                 throw new ReadOnlyError;
 909
 910                         case self::AS_RATE_LIMITED:
 911                                 throw new ThrottledError();
 912
 913                         case self::AS_NO_CREATE_PERMISSION:
 914                                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
 915                                 throw new PermissionsError( $permission );
 916
 917                 }
 918                 return false;
 919         }
 920
 921         /**
 922          * Attempt submission (no UI)
 923          *
 924          * @param $result
 925          * @param $bot bool
 926          *
 927          * @return Status object, possibly with a message, but always with one of the AS_* constants in $status->value,
 928          *
 929          * FIXME: This interface is TERRIBLE, but hard to get rid of due to various error display idiosyncrasies. There are
 930          * also lots of cases where error metadata is set in the object and retrieved later instead of being returned, e.g.
 931          * AS_CONTENT_TOO_BIG and AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some time.
 932          */
 933         function internalAttemptSave( &$result, $bot = false ) {
 934                 global $wgFilterCallback, $wgUser, $wgRequest, $wgParser;
 935                 global $wgMaxArticleSize;
 936
 937                 $status = Status::newGood();
 938
 939                 wfProfileIn( __METHOD__  );
 940                 wfProfileIn( __METHOD__ . '-checks' );
 941
 942                 if ( !wfRunHooks( 'EditPage::attemptSave', array( $this ) ) ) {
 943                         wfDebug( "Hook 'EditPage::attemptSave' aborted article saving\n" );
 944                         $status->fatal( 'hookaborted' );
 945                         $status->value = self::AS_HOOK_ERROR;
 946                         wfProfileOut( __METHOD__ . '-checks' );
 947                         wfProfileOut( __METHOD__  );
 948                         return $status;
 949                 }
 950
 951                 # Check image redirect
 952                 if ( $this->mTitle->getNamespace() == NS_FILE &&
 953                         Title::newFromRedirect( $this->textbox1 ) instanceof Title &&
 954                         !$wgUser->isAllowed( 'upload' ) ) {
 955                                 $code = $wgUser->isAnon() ? self::AS_IMAGE_REDIRECT_ANON : self::AS_IMAGE_REDIRECT_LOGGED;
 956                                 $status->setResult( false, $code );
 957
 958                                 wfProfileOut( __METHOD__ . '-checks' );
 959                                 wfProfileOut( __METHOD__  );
 960
 961                                 return $status;
 962                 }
 963
 964                 # Check for spam
 965                 $match = self::matchSummarySpamRegex( $this->summary );
 966                 if ( $match === false ) {
 967                         $match = self::matchSpamRegex( $this->textbox1 );
 968                 }
 969                 if ( $match !== false ) {
 970                         $result['spam'] = $match;
 971                         $ip = $wgRequest->getIP();
 972                         $pdbk = $this->mTitle->getPrefixedDBkey();
 973                         $match = str_replace( "\n", '', $match );
 974                         wfDebugLog( 'SpamRegex', "$ip spam regex hit [[$pdbk]]: \"$match\"" );
 975                         $status->fatal( 'spamprotectionmatch', $match );
 976                         $status->value = self::AS_SPAM_ERROR;
 977                         wfProfileOut( __METHOD__ . '-checks' );
 978                         wfProfileOut( __METHOD__ );
 979                         return $status;
 980                 }
 981                 if ( $wgFilterCallback && is_callable( $wgFilterCallback ) && $wgFilterCallback( $this->mTitle, $this->textbox1, $this->section, $this->hookError, $this->summary ) ) {
 982                         # Error messages or other handling should be performed by the filter function
 983                         $status->setResult( false, self::AS_FILTERING );
 984                         wfProfileOut( __METHOD__ . '-checks' );
 985                         wfProfileOut( __METHOD__ );
 986                         return $status;
 987                 }
 988                 if ( !wfRunHooks( 'EditFilter', array( $this, $this->textbox1, $this->section, &$this->hookError, $this->summary ) ) ) {
 989                         # Error messages etc. could be handled within the hook...
 990                         $status->fatal( 'hookaborted' );
 991                         $status->value = self::AS_HOOK_ERROR;
 992                         wfProfileOut( __METHOD__ . '-checks' );
 993                         wfProfileOut( __METHOD__ );
 994                         return $status;
 995                 } elseif ( $this->hookError != '' ) {
 996                         # ...or the hook could be expecting us to produce an error
 997                         $status->fatal( 'hookaborted' );
 998                         $status->value = self::AS_HOOK_ERROR_EXPECTED;
 999                         wfProfileOut( __METHOD__ . '-checks' );
1000                         wfProfileOut( __METHOD__ );
1001                         return $status;
1002                 }
1003
1004                 if ( $wgUser->isBlockedFrom( $this->mTitle, false ) ) {
1005                         // Auto-block user's IP if the account was "hard" blocked
1006                         $wgUser->spreadAnyEditBlock();
1007                         # Check block state against master, thus 'false'.
1008                         $status->setResult( false, self::AS_BLOCKED_PAGE_FOR_USER );
1009                         wfProfileOut( __METHOD__ . '-checks' );
1010                         wfProfileOut( __METHOD__ );
1011                         return $status;
1012                 }
1013
1014                 $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1015                 if ( $this->kblength > $wgMaxArticleSize ) {
1016                         // Error will be displayed by showEditForm()
1017                         $this->tooBig = true;
1018                         $status->setResult( false, self::AS_CONTENT_TOO_BIG );
1019                         wfProfileOut( __METHOD__ . '-checks' );
1020                         wfProfileOut( __METHOD__ );
1021                         return $status;
1022                 }
1023
1024                 if ( !$wgUser->isAllowed( 'edit' ) ) {
1025                         if ( $wgUser->isAnon() ) {
1026                                 $status->setResult( false, self::AS_READ_ONLY_PAGE_ANON );
1027                                 wfProfileOut( __METHOD__ . '-checks' );
1028                                 wfProfileOut( __METHOD__ );
1029                                 return $status;
1030                         } else {
1031                                 $status->fatal( 'readonlytext' );
1032                                 $status->value = self::AS_READ_ONLY_PAGE_LOGGED;
1033                                 wfProfileOut( __METHOD__ . '-checks' );
1034                                 wfProfileOut( __METHOD__ );
1035                                 return $status;
1036                         }
1037                 }
1038
1039                 if ( wfReadOnly() ) {
1040                         $status->fatal( 'readonlytext' );
1041                         $status->value = self::AS_READ_ONLY_PAGE;
1042                         wfProfileOut( __METHOD__ . '-checks' );
1043                         wfProfileOut( __METHOD__ );
1044                         return $status;
1045                 }
1046                 if ( $wgUser->pingLimiter() ) {
1047                         $status->fatal( 'actionthrottledtext' );
1048                         $status->value = self::AS_RATE_LIMITED;
1049                         wfProfileOut( __METHOD__ . '-checks' );
1050                         wfProfileOut( __METHOD__ );
1051                         return $status;
1052                 }
1053
1054                 # If the article has been deleted while editing, don't save it without
1055                 # confirmation
1056                 if ( $this->wasDeletedSinceLastEdit() && !$this->recreate ) {
1057                         $status->setResult( false, self::AS_ARTICLE_WAS_DELETED );
1058                         wfProfileOut( __METHOD__ . '-checks' );
1059                         wfProfileOut( __METHOD__ );
1060                         return $status;
1061                 }
1062
1063                 wfProfileOut( __METHOD__ . '-checks' );
1064
1065                 # If article is new, insert it.
1066                 $aid = $this->mTitle->getArticleID( Title::GAID_FOR_UPDATE );
1067                 $new = ( $aid == 0 );
1068
1069                 if ( $new ) {
1070                         // Late check for create permission, just in case *PARANOIA*
1071                         if ( !$this->mTitle->userCan( 'create' ) ) {
1072                                 $status->fatal( 'nocreatetext' );
1073                                 $status->value = self::AS_NO_CREATE_PERMISSION;
1074                                 wfDebug( __METHOD__ . ": no create permission\n" );
1075                                 wfProfileOut( __METHOD__ );
1076                                 return $status;
1077                         }
1078
1079                         # Don't save a new article if it's blank.
1080                         if ( $this->textbox1 == '' ) {
1081                                 $status->setResult( false, self::AS_BLANK_ARTICLE );
1082                                 wfProfileOut( __METHOD__ );
1083                                 return $status;
1084                         }
1085
1086                         // Run post-section-merge edit filter
1087                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $this->textbox1, &$this->hookError, $this->summary ) ) ) {
1088                                 # Error messages etc. could be handled within the hook...
1089                                 $status->fatal( 'hookaborted' );
1090                                 $status->value = self::AS_HOOK_ERROR;
1091                                 wfProfileOut( __METHOD__ );
1092                                 return $status;
1093                         } elseif ( $this->hookError != '' ) {
1094                                 # ...or the hook could be expecting us to produce an error
1095                                 $status->fatal( 'hookaborted' );
1096                                 $status->value = self::AS_HOOK_ERROR_EXPECTED;
1097                                 wfProfileOut( __METHOD__ );
1098                                 return $status;
1099                         }
1100
1101                         # Handle the user preference to force summaries here. Check if it's not a redirect.
1102                         if ( !$this->allowBlankSummary && !Title::newFromRedirect( $this->textbox1 ) ) {
1103                                 if ( md5( $this->summary ) == $this->autoSumm ) {
1104                                         $this->missingSummary = true;
1105                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1106                                         $status->value = self::AS_SUMMARY_NEEDED;
1107                                         wfProfileOut( __METHOD__ );
1108                                         return $status;
1109                                 }
1110                         }
1111
1112                         $text = $this->textbox1;
1113                         if ( $this->section == 'new' && $this->summary != '' ) {
1114                                 $text = wfMsgForContent( 'newsectionheaderdefaultlevel', $this->summary ) . "\n\n" . $text;
1115                         }
1116
1117                         $status->value = self::AS_SUCCESS_NEW_ARTICLE;
1118
1119                 } else {
1120
1121                         # Article exists. Check for edit conflict.
1122
1123                         $this->mArticle->clear(); # Force reload of dates, etc.
1124
1125                         wfDebug( "timestamp: {$this->mArticle->getTimestamp()}, edittime: {$this->edittime}\n" );
1126
1127                         if ( $this->mArticle->getTimestamp() != $this->edittime ) {
1128                                 $this->isConflict = true;
1129                                 if ( $this->section == 'new' ) {
1130                                         if ( $this->mArticle->getUserText() == $wgUser->getName() &&
1131                                                 $this->mArticle->getComment() == $this->summary ) {
1132                                                 // Probably a duplicate submission of a new comment.
1133                                                 // This can happen when squid resends a request after
1134                                                 // a timeout but the first one actually went through.
1135                                                 wfDebug( __METHOD__ . ": duplicate new section submission; trigger edit conflict!\n" );
1136                                         } else {
1137                                                 // New comment; suppress conflict.
1138                                                 $this->isConflict = false;
1139                                                 wfDebug( __METHOD__ .": conflict suppressed; new section\n" );
1140                                         }
1141                                 } elseif ( $this->section == '' && $this->userWasLastToEdit( $wgUser->getId(), $this->edittime ) ) {
1142                                         # Suppress edit conflict with self, except for section edits where merging is required.
1143                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, same user.\n" );
1144                                         $this->isConflict = false;
1145                                 }
1146                         }
1147
1148                         if ( $this->isConflict ) {
1149                                 wfDebug( __METHOD__ . ": conflict! getting section '$this->section' for time '$this->edittime' (article time '" .
1150                                         $this->mArticle->getTimestamp() . "')\n" );
1151                                 $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary, $this->edittime );
1152                         } else {
1153                                 wfDebug( __METHOD__ . ": getting section '$this->section'\n" );
1154                                 $text = $this->mArticle->replaceSection( $this->section, $this->textbox1, $this->summary );
1155                         }
1156                         if ( is_null( $text ) ) {
1157                                 wfDebug( __METHOD__ . ": activating conflict; section replace failed.\n" );
1158                                 $this->isConflict = true;
1159                                 $text = $this->textbox1; // do not try to merge here!
1160                         } elseif ( $this->isConflict ) {
1161                                 # Attempt merge
1162                                 if ( $this->mergeChangesInto( $text ) ) {
1163                                         // Successful merge! Maybe we should tell the user the good news?
1164                                         $this->isConflict = false;
1165                                         wfDebug( __METHOD__ . ": Suppressing edit conflict, successful merge.\n" );
1166                                 } else {
1167                                         $this->section = '';
1168                                         $this->textbox1 = $text;
1169                                         wfDebug( __METHOD__ . ": Keeping edit conflict, failed merge.\n" );
1170                                 }
1171                         }
1172
1173                         if ( $this->isConflict ) {
1174                                 $status->setResult( false, self::AS_CONFLICT_DETECTED );
1175                                 wfProfileOut( __METHOD__ );
1176                                 return $status;
1177                         }
1178
1179                         // Run post-section-merge edit filter
1180                         if ( !wfRunHooks( 'EditFilterMerged', array( $this, $text, &$this->hookError, $this->summary ) ) ) {
1181                                 # Error messages etc. could be handled within the hook...
1182                                 $status->fatal( 'hookaborted' );
1183                                 $status->value = self::AS_HOOK_ERROR;
1184                                 wfProfileOut( __METHOD__ );
1185                                 return $status;
1186                         } elseif ( $this->hookError != '' ) {
1187                                 # ...or the hook could be expecting us to produce an error
1188                                 $status->fatal( 'hookaborted' );
1189                                 $status->value = self::AS_HOOK_ERROR_EXPECTED;
1190                                 wfProfileOut( __METHOD__ );
1191                                 return $status;
1192                         }
1193
1194                         # Handle the user preference to force summaries here, but not for null edits
1195                         if ( $this->section != 'new' && !$this->allowBlankSummary
1196                                 && 0 != strcmp( $this->mArticle->getContent(), $text )
1197                                 && !Title::newFromRedirect( $text ) ) # check if it's not a redirect
1198                         {
1199                                 if ( md5( $this->summary ) == $this->autoSumm ) {
1200                                         $this->missingSummary = true;
1201                                         $status->fatal( 'missingsummary' );
1202                                         $status->value = self::AS_SUMMARY_NEEDED;
1203                                         wfProfileOut( __METHOD__ );
1204                                         return $status;
1205                                 }
1206                         }
1207
1208                         # And a similar thing for new sections
1209                         if ( $this->section == 'new' && !$this->allowBlankSummary ) {
1210                                 if ( trim( $this->summary ) == '' ) {
1211                                         $this->missingSummary = true;
1212                                         $status->fatal( 'missingsummary' ); // or 'missingcommentheader' if $section == 'new'. Blegh
1213                                         $status->value = self::AS_SUMMARY_NEEDED;
1214                                         wfProfileOut( __METHOD__ );
1215                                         return $status;
1216                                 }
1217                         }
1218
1219                         # All's well
1220                         wfProfileIn( __METHOD__ . '-sectionanchor' );
1221                         $sectionanchor = '';
1222                         if ( $this->section == 'new' ) {
1223                                 if ( $this->textbox1 == '' ) {
1224                                         $this->missingComment = true;
1225                                         $status->fatal( 'missingcommenttext' );
1226                                         $status->value = self::AS_TEXTBOX_EMPTY;
1227                                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1228                                         wfProfileOut( __METHOD__ );
1229                                         return $status;
1230                                 }
1231                                 if ( $this->summary != '' ) {
1232                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $this->summary );
1233                                         # This is a new section, so create a link to the new section
1234                                         # in the revision summary.
1235                                         $cleanSummary = $wgParser->stripSectionName( $this->summary );
1236                                         $this->summary = wfMsgForContent( 'newsectionsummary', $cleanSummary );
1237                                 }
1238                         } elseif ( $this->section != '' ) {
1239                                 # Try to get a section anchor from the section source, redirect to edited section if header found
1240                                 # XXX: might be better to integrate this into Article::replaceSection
1241                                 # for duplicate heading checking and maybe parsing
1242                                 $hasmatch = preg_match( "/^ *([=]{1,6})(.*?)(\\1) *\\n/i", $this->textbox1, $matches );
1243                                 # we can't deal with anchors, includes, html etc in the header for now,
1244                                 # headline would need to be parsed to improve this
1245                                 if ( $hasmatch && strlen( $matches[2] ) > 0 ) {
1246                                         $sectionanchor = $wgParser->guessLegacySectionNameFromWikiText( $matches[2] );
1247                                 }
1248                         }
1249                         $result['sectionanchor'] = $sectionanchor;
1250                         wfProfileOut( __METHOD__ . '-sectionanchor' );
1251
1252                         // Save errors may fall down to the edit form, but we've now
1253                         // merged the section into full text. Clear the section field
1254                         // so that later submission of conflict forms won't try to
1255                         // replace that into a duplicated mess.
1256                         $this->textbox1 = $text;
1257                         $this->section = '';
1258
1259                         $status->value = self::AS_SUCCESS_UPDATE;
1260                 }
1261
1262                 // Check for length errors again now that the section is merged in
1263                 $this->kblength = (int)( strlen( $text ) / 1024 );
1264                 if ( $this->kblength > $wgMaxArticleSize ) {
1265                         $this->tooBig = true;
1266                         $status->setResult( false, self::AS_MAX_ARTICLE_SIZE_EXCEEDED );
1267                         wfProfileOut( __METHOD__ );
1268                         return $status;
1269                 }
1270
1271                 $flags = EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1272                         ( $new ? EDIT_NEW : EDIT_UPDATE ) |
1273                         ( ( $this->minoredit && !$this->isNew ) ? EDIT_MINOR : 0 ) |
1274                         ( $bot ? EDIT_FORCE_BOT : 0 );
1275
1276                 $doEditStatus = $this->mArticle->doEdit( $text, $this->summary, $flags );
1277
1278                 if ( $doEditStatus->isOK() ) {
1279                         $result['redirect'] = Title::newFromRedirect( $text ) !== null;
1280                         $this->commitWatch();
1281                         wfProfileOut( __METHOD__ );
1282                         return $status;
1283                 } else {
1284                         $this->isConflict = true;
1285                         $doEditStatus->value = self::AS_END; // Destroys data doEdit() put in $status->value but who cares
1286                         wfProfileOut( __METHOD__ );
1287                         return $doEditStatus;
1288                 }
1289         }
1290
1291         /**
1292          * Commit the change of watch status
1293          */
1294         protected function commitWatch() {
1295                 global $wgUser;
1296                 if ( $this->watchthis xor $this->mTitle->userIsWatching() ) {
1297                         $dbw = wfGetDB( DB_MASTER );
1298                         $dbw->begin();
1299                         if ( $this->watchthis ) {
1300                                 WatchAction::doWatch( $this->mTitle, $wgUser );
1301                         } else {
1302                                 WatchAction::doUnwatch( $this->mTitle, $wgUser );
1303                         }
1304                         $dbw->commit();
1305                 }
1306         }
1307
1308         /**
1309          * Check if no edits were made by other users since
1310          * the time a user started editing the page. Limit to
1311          * 50 revisions for the sake of performance.
1312          *
1313          * @param $id int
1314          * @param $edittime string
1315          *
1316          * @return bool
1317          */
1318         protected function userWasLastToEdit( $id, $edittime ) {
1319                 if( !$id ) return false;
1320                 $dbw = wfGetDB( DB_MASTER );
1321                 $res = $dbw->select( 'revision',
1322                         'rev_user',
1323                         array(
1324                                 'rev_page' => $this->mArticle->getId(),
1325                                 'rev_timestamp > '.$dbw->addQuotes( $dbw->timestamp($edittime) )
1326                         ),
1327                         __METHOD__,
1328                         array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
1329                 foreach ( $res as $row ) {
1330                         if( $row->rev_user != $id ) {
1331                                 return false;
1332                         }
1333                 }
1334                 return true;
1335         }
1336
1337         /**
1338          * @private
1339          * @todo document
1340          *
1341          * @parma $editText string
1342          *
1343          * @return bool
1344          */
1345         function mergeChangesInto( &$editText ){
1346                 wfProfileIn( __METHOD__ );
1347
1348                 $db = wfGetDB( DB_MASTER );
1349
1350                 // This is the revision the editor started from
1351                 $baseRevision = $this->getBaseRevision();
1352                 if ( is_null( $baseRevision ) ) {
1353                         wfProfileOut( __METHOD__ );
1354                         return false;
1355                 }
1356                 $baseText = $baseRevision->getText();
1357
1358                 // The current state, we want to merge updates into it
1359                 $currentRevision = Revision::loadFromTitle( $db, $this->mTitle );
1360                 if ( is_null( $currentRevision ) ) {
1361                         wfProfileOut( __METHOD__ );
1362                         return false;
1363                 }
1364                 $currentText = $currentRevision->getText();
1365
1366                 $result = '';
1367                 if ( wfMerge( $baseText, $editText, $currentText, $result ) ) {
1368                         $editText = $result;
1369                         wfProfileOut( __METHOD__ );
1370                         return true;
1371                 } else {
1372                         wfProfileOut( __METHOD__ );
1373                         return false;
1374                 }
1375         }
1376
1377         /**
1378          * @return Revision
1379          */
1380         function getBaseRevision() {
1381                 if ( !$this->mBaseRevision ) {
1382                         $db = wfGetDB( DB_MASTER );
1383                         $baseRevision = Revision::loadFromTimestamp(
1384                                 $db, $this->mTitle, $this->edittime );
1385                         return $this->mBaseRevision = $baseRevision;
1386                 } else {
1387                         return $this->mBaseRevision;
1388                 }
1389         }
1390
1391         /**
1392          * Check given input text against $wgSpamRegex, and return the text of the first match.
1393          *
1394          * @param $text string
1395          *
1396          * @return string|false matching string or false
1397          */
1398         public static function matchSpamRegex( $text ) {
1399                 global $wgSpamRegex;
1400                 // For back compatibility, $wgSpamRegex may be a single string or an array of regexes.
1401                 $regexes = (array)$wgSpamRegex;
1402                 return self::matchSpamRegexInternal( $text, $regexes );
1403         }
1404
1405         /**
1406          * Check given input text against $wgSpamRegex, and return the text of the first match.
1407          *
1408          * @parma $text string
1409          *
1410          * @return string|false  matching string or false
1411          */
1412         public static function matchSummarySpamRegex( $text ) {
1413                 global $wgSummarySpamRegex;
1414                 $regexes = (array)$wgSummarySpamRegex;
1415                 return self::matchSpamRegexInternal( $text, $regexes );
1416         }
1417
1418         /**
1419          * @param $text string
1420          * @param $regexes array
1421          * @return bool|string
1422          */
1423         protected static function matchSpamRegexInternal( $text, $regexes ) {
1424                 foreach( $regexes as $regex ) {
1425                         $matches = array();
1426                         if( preg_match( $regex, $text, $matches ) ) {
1427                                 return $matches[0];
1428                         }
1429                 }
1430                 return false;
1431         }
1432
1433         function setHeaders() {
1434                 global $wgOut;
1435                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1436                 if ( $this->isConflict ) {
1437                         $wgOut->setPageTitle( wfMessage( 'editconflict', $this->getContextTitle()->getPrefixedText() ) );
1438                 } elseif ( $this->section != '' ) {
1439                         $msg = $this->section == 'new' ? 'editingcomment' : 'editingsection';
1440                         $wgOut->setPageTitle( wfMessage( $msg, $this->getContextTitle()->getPrefixedText() ) );
1441                 } else {
1442                         # Use the title defined by DISPLAYTITLE magic word when present
1443                         if ( isset( $this->mParserOutput )
1444                          && ( $dt = $this->mParserOutput->getDisplayTitle() ) !== false ) {
1445                                 $title = $dt;
1446                         } else {
1447                                 $title = $this->getContextTitle()->getPrefixedText();
1448                         }
1449                         $wgOut->setPageTitle( wfMessage( 'editing', $title ) );
1450                 }
1451         }
1452
1453         /**
1454          * Show all applicable editing introductions
1455          */
1456         protected function showIntro() {
1457                 global $wgOut, $wgUser;
1458                 if ( $this->suppressIntro ) {
1459                         return;
1460                 }
1461
1462                 $namespace = $this->mTitle->getNamespace();
1463
1464                 if ( $namespace == NS_MEDIAWIKI ) {
1465                         # Show a warning if editing an interface message
1466                         $wgOut->wrapWikiMsg( "<div class='mw-editinginterface'>\n$1\n</div>", 'editinginterface' );
1467                 }
1468
1469                 # Show a warning message when someone creates/edits a user (talk) page but the user does not exist
1470                 # Show log extract when the user is currently blocked
1471                 if ( $namespace == NS_USER || $namespace == NS_USER_TALK ) {
1472                         $parts = explode( '/', $this->mTitle->getText(), 2 );
1473                         $username = $parts[0];
1474                         $user = User::newFromName( $username, false /* allow IP users*/ );
1475                         $ip = User::isIP( $username );
1476                         if ( !$user->isLoggedIn() && !$ip ) { # User does not exist
1477                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
1478                                         array( 'userpage-userdoesnotexist', wfEscapeWikiText( $username ) ) );
1479                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
1480                                 LogEventsList::showLogExtract(
1481                                         $wgOut,
1482                                         'block',
1483                                         $user->getUserPage(),
1484                                         '',
1485                                         array(
1486                                                 'lim' => 1,
1487                                                 'showIfEmpty' => false,
1488                                                 'msgKey' => array(
1489                                                         'blocked-notice-logextract',
1490                                                         $user->getName() # Support GENDER in notice
1491                                                 )
1492                                         )
1493                                 );
1494                         }
1495                 }
1496                 # Try to add a custom edit intro, or use the standard one if this is not possible.
1497                 if ( !$this->showCustomIntro() && !$this->mTitle->exists() ) {
1498                         if ( $wgUser->isLoggedIn() ) {
1499                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletext\">\n$1\n</div>", 'newarticletext' );
1500                         } else {
1501                                 $wgOut->wrapWikiMsg( "<div class=\"mw-newarticletextanon\">\n$1\n</div>", 'newarticletextanon' );
1502                         }
1503                 }
1504                 # Give a notice if the user is editing a deleted/moved page...
1505                 if ( !$this->mTitle->exists() ) {
1506                         LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle,
1507                                 '', array( 'lim' => 10,
1508                                            'conds' => array( "log_action != 'revision'" ),
1509                                            'showIfEmpty' => false,
1510                                            'msgKey' => array( 'recreate-moveddeleted-warn') )
1511                         );
1512                 }
1513         }
1514
1515         /**
1516          * Attempt to show a custom editing introduction, if supplied
1517          *
1518          * @return bool
1519          */
1520         protected function showCustomIntro() {
1521                 if ( $this->editintro ) {
1522                         $title = Title::newFromText( $this->editintro );
1523                         if ( $title instanceof Title && $title->exists() && $title->userCanRead() ) {
1524                                 global $wgOut;
1525                                 // Added using template syntax, to take <noinclude>'s into account.
1526                                 $wgOut->addWikiTextTitleTidy( '{{:' . $title->getFullText() . '}}', $this->mTitle );
1527                                 return true;
1528                         } else {
1529                                 return false;
1530                         }
1531                 } else {
1532                         return false;
1533                 }
1534         }
1535
1536         /**
1537          * Send the edit form and related headers to $wgOut
1538          * @param $formCallback Callback that takes an OutputPage parameter; will be called
1539          *     during form output near the top, for captchas and the like.
1540          */
1541         function showEditForm( $formCallback = null ) {
1542                 global $wgOut, $wgUser;
1543
1544                 wfProfileIn( __METHOD__ );
1545
1546                 #need to parse the preview early so that we know which templates are used,
1547                 #otherwise users with "show preview after edit box" will get a blank list
1548                 #we parse this near the beginning so that setHeaders can do the title
1549                 #setting work instead of leaving it in getPreviewText
1550                 $previewOutput = '';
1551                 if ( $this->formtype == 'preview' ) {
1552                         $previewOutput = $this->getPreviewText();
1553                 }
1554
1555                 wfRunHooks( 'EditPage::showEditForm:initial', array( &$this ) );
1556
1557                 $this->setHeaders();
1558
1559                 # Enabled article-related sidebar, toplinks, etc.
1560                 $wgOut->setArticleRelated( true );
1561
1562                 if ( $this->showHeader() === false ) {
1563                         wfProfileOut( __METHOD__ );
1564                         return;
1565                 }
1566
1567                 $action = htmlspecialchars( $this->getActionURL( $this->getContextTitle() ) );
1568
1569                 if ( $wgUser->getOption( 'showtoolbar' ) and !$this->isCssJsSubpage ) {
1570                         # prepare toolbar for edit buttons
1571                         $toolbar = EditPage::getEditToolbar();
1572                 } else {
1573                         $toolbar = '';
1574                 }
1575
1576
1577                 $wgOut->addHTML( $this->editFormPageTop );
1578
1579                 if ( $wgUser->getOption( 'previewontop' ) ) {
1580                         $this->displayPreviewArea( $previewOutput, true );
1581                 }
1582
1583                 $wgOut->addHTML( $this->editFormTextTop );
1584
1585                 $templates = $this->getTemplates();
1586                 $formattedtemplates = Linker::formatTemplates( $templates, $this->preview, $this->section != '');
1587
1588                 $hiddencats = $this->mArticle->getHiddenCategories();
1589                 $formattedhiddencats = Linker::formatHiddenCategories( $hiddencats );
1590
1591                 if ( $this->wasDeletedSinceLastEdit() && 'save' != $this->formtype ) {
1592                         $wgOut->wrapWikiMsg(
1593                                 "<div class='error mw-deleted-while-editing'>\n$1\n</div>",
1594                                 'deletedwhileediting' );
1595                 } elseif ( $this->wasDeletedSinceLastEdit() ) {
1596                         // Hide the toolbar and edit area, user can click preview to get it back
1597                         // Add an confirmation checkbox and explanation.
1598                         $toolbar = '';
1599                         // @todo move this to a cleaner conditional instead of blanking a variable
1600                 }
1601                 $wgOut->addHTML( <<<HTML
1602 <form id="editform" name="editform" method="post" action="$action" enctype="multipart/form-data">
1603 HTML
1604 );
1605
1606                 if ( is_callable( $formCallback ) ) {
1607                         call_user_func_array( $formCallback, array( &$wgOut ) );
1608                 }
1609
1610                 wfRunHooks( 'EditPage::showEditForm:fields', array( &$this, &$wgOut ) );
1611
1612                 // Put these up at the top to ensure they aren't lost on early form submission
1613                 $this->showFormBeforeText();
1614
1615                 if ( $this->wasDeletedSinceLastEdit() && 'save' == $this->formtype ) {
1616                         $username = $this->lastDelete->user_name;
1617                         $comment = $this->lastDelete->log_comment;
1618
1619                         // It is better to not parse the comment at all than to have templates expanded in the middle
1620                         // TODO: can the checkLabel be moved outside of the div so that wrapWikiMsg could be used?
1621                         $key = $comment === ''
1622                                 ? 'confirmrecreate-noreason'
1623                                 : 'confirmrecreate';
1624                         $wgOut->addHTML(
1625                                 '<div class="mw-confirm-recreate">' .
1626                                 wfMsgExt( $key, 'parseinline', $username, "<nowiki>$comment</nowiki>" ) .
1627                                 Xml::checkLabel( wfMsg( 'recreate' ), 'wpRecreate', 'wpRecreate', false,
1628                                         array( 'title' => Linker::titleAttrib( 'recreate' ), 'tabindex' => 1, 'id' => 'wpRecreate' )
1629                                 ) .
1630                                 '</div>'
1631                         );
1632                 }
1633
1634                 # If a blank edit summary was previously provided, and the appropriate
1635                 # user preference is active, pass a hidden tag as wpIgnoreBlankSummary. This will stop the
1636                 # user being bounced back more than once in the event that a summary
1637                 # is not required.
1638                 #####
1639                 # For a bit more sophisticated detection of blank summaries, hash the
1640                 # automatic one and pass that in the hidden field wpAutoSummary.
1641                 if ( $this->missingSummary ||
1642                         ( $this->section == 'new' && $this->nosummary ) )
1643                                 $wgOut->addHTML( Html::hidden( 'wpIgnoreBlankSummary', true ) );
1644                 $autosumm = $this->autoSumm ? $this->autoSumm : md5( $this->summary );
1645                 $wgOut->addHTML( Html::hidden( 'wpAutoSummary', $autosumm ) );
1646
1647                 $wgOut->addHTML( Html::hidden( 'oldid', $this->mArticle->getOldID() ) );
1648
1649                 if ( $this->section == 'new' ) {
1650                         $this->showSummaryInput( true, $this->summary );
1651                         $wgOut->addHTML( $this->getSummaryPreview( true, $this->summary ) );
1652                 }
1653
1654                 $wgOut->addHTML( $this->editFormTextBeforeContent );
1655
1656                 $wgOut->addHTML( $toolbar );
1657
1658                 if ( $this->isConflict ) {
1659                         // In an edit conflict bypass the overrideable content form method
1660                         // and fallback to the raw wpTextbox1 since editconflicts can't be
1661                         // resolved between page source edits and custom ui edits using the
1662                         // custom edit ui.
1663                         $this->showTextbox1( null, $this->getContent() );
1664                 } else {
1665                         $this->showContentForm();
1666                 }
1667
1668                 $wgOut->addHTML( $this->editFormTextAfterContent );
1669
1670                 $wgOut->addWikiText( $this->getCopywarn() );
1671                 if ( isset($this->editFormTextAfterWarn) && $this->editFormTextAfterWarn !== '' )
1672                         $wgOut->addHTML( $this->editFormTextAfterWarn );
1673
1674                 $this->showStandardInputs();
1675
1676                 $this->showFormAfterText();
1677
1678                 $this->showTosSummary();
1679                 $this->showEditTools();
1680
1681                 $wgOut->addHTML( <<<HTML
1682 {$this->editFormTextAfterTools}
1683 <div class='templatesUsed'>
1684 {$formattedtemplates}
1685 </div>
1686 <div class='hiddencats'>
1687 {$formattedhiddencats}
1688 </div>
1689 HTML
1690 );
1691
1692                 if ( $this->isConflict )
1693                         $this->showConflict();
1694
1695                 $wgOut->addHTML( $this->editFormTextBottom );
1696                 $wgOut->addHTML( "</form>\n" );
1697                 if ( !$wgUser->getOption( 'previewontop' ) ) {
1698                         $this->displayPreviewArea( $previewOutput, false );
1699                 }
1700
1701                 wfProfileOut( __METHOD__ );
1702         }
1703
1704         protected function showHeader() {
1705                 global $wgOut, $wgUser, $wgMaxArticleSize, $wgLang;
1706                 if ( $this->isConflict ) {
1707                         $wgOut->wrapWikiMsg( "<div class='mw-explainconflict'>\n$1\n</div>", 'explainconflict' );
1708                         $this->edittime = $this->mArticle->getTimestamp();
1709                 } else {
1710                         if ( $this->section != '' && !$this->isSectionEditSupported() ) {
1711                                 // We use $this->section to much before this and getVal('wgSection') directly in other places
1712                                 // at this point we can't reset $this->section to '' to fallback to non-section editing.
1713                                 // Someone is welcome to try refactoring though
1714                                 $wgOut->showErrorPage( 'sectioneditnotsupported-title', 'sectioneditnotsupported-text' );
1715                                 return false;
1716                         }
1717
1718                         if ( $this->section != '' && $this->section != 'new' ) {
1719                                 $matches = array();
1720                                 if ( !$this->summary && !$this->preview && !$this->diff ) {
1721                                         preg_match( "/^(=+)(.+)\\1/mi", $this->textbox1, $matches );
1722                                         if ( !empty( $matches[2] ) ) {
1723                                                 global $wgParser;
1724                                                 $this->summary = "/* " .
1725                                                         $wgParser->stripSectionName(trim($matches[2])) .
1726                                                         " */ ";
1727                                         }
1728                                 }
1729                         }
1730
1731                         if ( $this->missingComment ) {
1732                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommenttext'>\n$1\n</div>", 'missingcommenttext' );
1733                         }
1734
1735                         if ( $this->missingSummary && $this->section != 'new' ) {
1736                                 $wgOut->wrapWikiMsg( "<div id='mw-missingsummary'>\n$1\n</div>", 'missingsummary' );
1737                         }
1738
1739                         if ( $this->missingSummary && $this->section == 'new' ) {
1740                                 $wgOut->wrapWikiMsg( "<div id='mw-missingcommentheader'>\n$1\n</div>", 'missingcommentheader' );
1741                         }
1742
1743                         if ( $this->hookError !== '' ) {
1744                                 $wgOut->addWikiText( $this->hookError );
1745                         }
1746
1747                         if ( !$this->checkUnicodeCompliantBrowser() ) {
1748                                 $wgOut->addWikiMsg( 'nonunicodebrowser' );
1749                         }
1750
1751                         if ( isset( $this->mArticle ) && isset( $this->mArticle->mRevision ) ) {
1752                         // Let sysop know that this will make private content public if saved
1753
1754                                 if ( !$this->mArticle->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1755                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-permission' );
1756                                 } elseif ( $this->mArticle->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1757                                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
1758                                 }
1759
1760                                 if ( !$this->mArticle->mRevision->isCurrent() ) {
1761                                         $this->mArticle->setOldSubtitle( $this->mArticle->mRevision->getId() );
1762                                         $wgOut->addWikiMsg( 'editingold' );
1763                                 }
1764                         }
1765                 }
1766
1767                 if ( wfReadOnly() ) {
1768                         $wgOut->wrapWikiMsg( "<div id=\"mw-read-only-warning\">\n$1\n</div>", array( 'readonlywarning', wfReadOnlyReason() ) );
1769                 } elseif ( $wgUser->isAnon() ) {
1770                         if ( $this->formtype != 'preview' ) {
1771                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-edit-warning\">\n$1</div>", 'anoneditwarning' );
1772                         } else {
1773                                 $wgOut->wrapWikiMsg( "<div id=\"mw-anon-preview-warning\">\n$1</div>", 'anonpreviewwarning' );
1774                         }
1775                 } else {
1776                         if ( $this->isCssJsSubpage ) {
1777                                 # Check the skin exists
1778                                 if ( $this->isWrongCaseCssJsPage ) {
1779                                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-userinvalidcssjstitle'>\n$1\n</div>", array( 'userinvalidcssjstitle', $this->mTitle->getSkinFromCssJsSubpage() ) );
1780                                 }
1781                                 if ( $this->formtype !== 'preview' ) {
1782                                         if ( $this->isCssSubpage )
1783                                                 $wgOut->wrapWikiMsg( "<div id='mw-usercssyoucanpreview'>\n$1\n</div>", array( 'usercssyoucanpreview' ) );
1784                                         if ( $this->isJsSubpage )
1785                                                 $wgOut->wrapWikiMsg( "<div id='mw-userjsyoucanpreview'>\n$1\n</div>", array( 'userjsyoucanpreview' ) );
1786                                 }
1787                         }
1788                 }
1789
1790                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
1791                         # Is the title semi-protected?
1792                         if ( $this->mTitle->isSemiProtected() ) {
1793                                 $noticeMsg = 'semiprotectedpagewarning';
1794                         } else {
1795                                 # Then it must be protected based on static groups (regular)
1796                                 $noticeMsg = 'protectedpagewarning';
1797                         }
1798                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
1799                                 array( 'lim' => 1, 'msgKey' => array( $noticeMsg ) ) );
1800                 }
1801                 if ( $this->mTitle->isCascadeProtected() ) {
1802                         # Is this page under cascading protection from some source pages?
1803                         list($cascadeSources, /* $restrictions */) = $this->mTitle->getCascadeProtectionSources();
1804                         $notice = "<div class='mw-cascadeprotectedwarning'>\n$1\n";
1805                         $cascadeSourcesCount = count( $cascadeSources );
1806                         if ( $cascadeSourcesCount > 0 ) {
1807                                 # Explain, and list the titles responsible
1808                                 foreach( $cascadeSources as $page ) {
1809                                         $notice .= '* [[:' . $page->getPrefixedText() . "]]\n";
1810                                 }
1811                         }
1812                         $notice .= '</div>';
1813                         $wgOut->wrapWikiMsg( $notice, array( 'cascadeprotectedwarning', $cascadeSourcesCount ) );
1814                 }
1815                 if ( !$this->mTitle->exists() && $this->mTitle->getRestrictions( 'create' ) ) {
1816                         LogEventsList::showLogExtract( $wgOut, 'protect', $this->mTitle, '',
1817                                 array(  'lim' => 1,
1818                                         'showIfEmpty' => false,
1819                                         'msgKey' => array( 'titleprotectedwarning' ),
1820                                         'wrap' => "<div class=\"mw-titleprotectedwarning\">\n$1</div>" ) );
1821                 }
1822
1823                 if ( $this->kblength === false ) {
1824                         $this->kblength = (int)( strlen( $this->textbox1 ) / 1024 );
1825                 }
1826
1827                 if ( $this->tooBig || $this->kblength > $wgMaxArticleSize ) {
1828                         $wgOut->wrapWikiMsg( "<div class='error' id='mw-edit-longpageerror'>\n$1\n</div>",
1829                                 array( 'longpageerror', $wgLang->formatNum( $this->kblength ), $wgLang->formatNum( $wgMaxArticleSize ) ) );
1830                 } else {
1831                         if( !wfMessage('longpage-hint')->isDisabled() ) {
1832                                 $wgOut->wrapWikiMsg( "<div id='mw-edit-longpage-hint'>\n$1\n</div>",
1833                                         array( 'longpage-hint', $wgLang->formatSize( strlen( $this->textbox1 ) ), strlen( $this->textbox1 ) )
1834                                 );
1835                         }
1836                 }
1837         }
1838
1839         /**
1840          * Standard summary input and label (wgSummary), abstracted so EditPage
1841          * subclasses may reorganize the form.
1842          * Note that you do not need to worry about the label's for=, it will be
1843          * inferred by the id given to the input. You can remove them both by
1844          * passing array( 'id' => false ) to $userInputAttrs.
1845          *
1846          * @param $summary string The value of the summary input
1847          * @param $labelText string The html to place inside the label
1848          * @param $inputAttrs array of attrs to use on the input
1849          * @param $spanLabelAttrs array of attrs to use on the span inside the label
1850          *
1851          * @return array An array in the format array( $label, $input )
1852          */
1853         function getSummaryInput($summary = "", $labelText = null, $inputAttrs = null, $spanLabelAttrs = null) {
1854                 //Note: the maxlength is overriden in JS to 250 and to make it use UTF-8 bytes, not characters.
1855                 $inputAttrs = ( is_array($inputAttrs) ? $inputAttrs : array() ) + array(
1856                         'id' => 'wpSummary',
1857                         'maxlength' => '200',
1858                         'tabindex' => '1',
1859                         'size' => 60,
1860                         'spellcheck' => 'true',
1861                 ) + Linker::tooltipAndAccesskeyAttribs( 'summary' );
1862
1863                 $spanLabelAttrs = ( is_array($spanLabelAttrs) ? $spanLabelAttrs : array() ) + array(
1864                         'class' => $this->missingSummary ? 'mw-summarymissed' : 'mw-summary',
1865                         'id' => "wpSummaryLabel"
1866                 );
1867
1868                 $label = null;
1869                 if ( $labelText ) {
1870                         $label = Xml::tags( 'label', $inputAttrs['id'] ? array( 'for' => $inputAttrs['id'] ) : null, $labelText );
1871                         $label = Xml::tags( 'span', $spanLabelAttrs, $label );
1872                 }
1873
1874                 $input = Html::input( 'wpSummary', $summary, 'text', $inputAttrs );
1875
1876                 return array( $label, $input );
1877         }
1878
1879         /**
1880          * @param $isSubjectPreview Boolean: true if this is the section subject/title
1881          *                          up top, or false if this is the comment summary
1882          *                          down below the textarea
1883          * @param $summary String: The text of the summary to display
1884          * @return String
1885          */
1886         protected function showSummaryInput( $isSubjectPreview, $summary = "" ) {
1887                 global $wgOut, $wgContLang;
1888                 # Add a class if 'missingsummary' is triggered to allow styling of the summary line
1889                 $summaryClass = $this->missingSummary ? 'mw-summarymissed' : 'mw-summary';
1890                 if ( $isSubjectPreview ) {
1891                         if ( $this->nosummary ) {
1892                                 return;
1893                         }
1894                 } else {
1895                         if ( !$this->mShowSummaryField ) {
1896                                 return;
1897                         }
1898                 }
1899                 $summary = $wgContLang->recodeForEdit( $summary );
1900                 $labelText = wfMsgExt( $isSubjectPreview ? 'subject' : 'summary', 'parseinline' );
1901                 list($label, $input) = $this->getSummaryInput($summary, $labelText, array( 'class' => $summaryClass ), array());
1902                 $wgOut->addHTML("{$label} {$input}");
1903         }
1904
1905         /**
1906          * @param $isSubjectPreview Boolean: true if this is the section subject/title
1907          *                          up top, or false if this is the comment summary
1908          *                          down below the textarea
1909          * @param $summary String: the text of the summary to display
1910          * @return String
1911          */
1912         protected function getSummaryPreview( $isSubjectPreview, $summary = "" ) {
1913                 if ( !$summary || ( !$this->preview && !$this->diff ) )
1914                         return "";
1915
1916                 global $wgParser;
1917
1918                 if ( $isSubjectPreview )
1919                         $summary = wfMsgForContent( 'newsectionsummary', $wgParser->stripSectionName( $summary ) );
1920
1921                 $message = $isSubjectPreview ? 'subject-preview' : 'summary-preview';
1922
1923                 $summary = wfMsgExt( $message, 'parseinline' ) . Linker::commentBlock( $summary, $this->mTitle, $isSubjectPreview );
1924                 return Xml::tags( 'div', array( 'class' => 'mw-summary-preview' ), $summary );
1925         }
1926
1927         protected function showFormBeforeText() {
1928                 global $wgOut;
1929                 $section = htmlspecialchars( $this->section );
1930                 $wgOut->addHTML( <<<HTML
1931 <input type='hidden' value="{$section}" name="wpSection" />
1932 <input type='hidden' value="{$this->starttime}" name="wpStarttime" />
1933 <input type='hidden' value="{$this->edittime}" name="wpEdittime" />
1934 <input type='hidden' value="{$this->scrolltop}" name="wpScrolltop" id="wpScrolltop" />
1935
1936 HTML
1937                 );
1938                 if ( !$this->checkUnicodeCompliantBrowser() )
1939                         $wgOut->addHTML(Html::hidden( 'safemode', '1' ));
1940         }
1941
1942         protected function showFormAfterText() {
1943                 global $wgOut, $wgUser;
1944                 /**
1945                  * To make it harder for someone to slip a user a page
1946                  * which submits an edit form to the wiki without their
1947                  * knowledge, a random token is associated with the login
1948                  * session. If it's not passed back with the submission,
1949                  * we won't save the page, or render user JavaScript and
1950                  * CSS previews.
1951                  *
1952                  * For anon editors, who may not have a session, we just
1953                  * include the constant suffix to prevent editing from
1954                  * broken text-mangling proxies.
1955                  */
1956                 $wgOut->addHTML( "\n" . Html::hidden( "wpEditToken", $wgUser->editToken() ) . "\n" );
1957         }
1958
1959         /**
1960          * Subpage overridable method for printing the form for page content editing
1961          * By default this simply outputs wpTextbox1
1962          * Subclasses can override this to provide a custom UI for editing;
1963          * be it a form, or simply wpTextbox1 with a modified content that will be
1964          * reverse modified when extracted from the post data.
1965          * Note that this is basically the inverse for importContentFormData
1966          */
1967         protected function showContentForm() {
1968                 $this->showTextbox1();
1969         }
1970
1971         /**
1972          * Method to output wpTextbox1
1973          * The $textoverride method can be used by subclasses overriding showContentForm
1974          * to pass back to this method.
1975          *
1976          * @param $customAttribs An array of html attributes to use in the textarea
1977          * @param $textoverride String: optional text to override $this->textarea1 with
1978          */
1979         protected function showTextbox1($customAttribs = null, $textoverride = null) {
1980                 $classes = array(); // Textarea CSS
1981                 if ( $this->mTitle->getNamespace() != NS_MEDIAWIKI && $this->mTitle->isProtected( 'edit' ) ) {
1982                         # Is the title semi-protected?
1983                         if ( $this->mTitle->isSemiProtected() ) {
1984                                 $classes[] = 'mw-textarea-sprotected';
1985                         } else {
1986                                 # Then it must be protected based on static groups (regular)
1987                                 $classes[] = 'mw-textarea-protected';
1988                         }
1989                         # Is the title cascade-protected?
1990                         if ( $this->mTitle->isCascadeProtected() ) {
1991                                 $classes[] = 'mw-textarea-cprotected';
1992                         }
1993                 }
1994                 $attribs = array( 'tabindex' => 1 );
1995                 if ( is_array($customAttribs) )
1996                         $attribs += $customAttribs;
1997
1998                 if ( $this->wasDeletedSinceLastEdit() )
1999                         $attribs['type'] = 'hidden';
2000                 if ( !empty( $classes ) ) {
2001                         if ( isset($attribs['class']) )
2002                                 $classes[] = $attribs['class'];
2003                         $attribs['class'] = implode( ' ', $classes );
2004                 }
2005
2006                 $this->showTextbox( isset($textoverride) ? $textoverride : $this->textbox1, 'wpTextbox1', $attribs );
2007         }
2008
2009         protected function showTextbox2() {
2010                 $this->showTextbox( $this->textbox2, 'wpTextbox2', array( 'tabindex' => 6, 'readonly' ) );
2011         }
2012
2013         protected function showTextbox( $content, $name, $customAttribs = array() ) {
2014                 global $wgOut, $wgUser;
2015
2016                 $wikitext = $this->safeUnicodeOutput( $content );
2017                 if ( strval($wikitext) !== '' ) {
2018                         // Ensure there's a newline at the end, otherwise adding lines
2019                         // is awkward.
2020                         // But don't add a newline if the ext is empty, or Firefox in XHTML
2021                         // mode will show an extra newline. A bit annoying.
2022                         $wikitext .= "\n";
2023                 }
2024
2025                 $attribs = $customAttribs + array(
2026                         'accesskey' => ',',
2027                         'id'   => $name,
2028                         'cols' => $wgUser->getIntOption( 'cols' ),
2029                         'rows' => $wgUser->getIntOption( 'rows' ),
2030                         'style' => '' // avoid php notices when appending preferences (appending allows customAttribs['style'] to still work
2031                 );
2032
2033                 $pageLang = $this->mTitle->getPageLanguage();
2034                 $attribs['lang'] = $pageLang->getCode();
2035                 $attribs['dir'] = $pageLang->getDir();
2036
2037                 $wgOut->addHTML( Html::textarea( $name, $wikitext, $attribs ) );
2038         }
2039
2040         protected function displayPreviewArea( $previewOutput, $isOnTop = false ) {
2041                 global $wgOut;
2042                 $classes = array();
2043                 if ( $isOnTop )
2044                         $classes[] = 'ontop';
2045
2046                 $attribs = array( 'id' => 'wikiPreview', 'class' => implode( ' ', $classes ) );
2047
2048                 if ( $this->formtype != 'preview' )
2049                         $attribs['style'] = 'display: none;';
2050
2051                 $wgOut->addHTML( Xml::openElement( 'div', $attribs ) );
2052
2053                 if ( $this->formtype == 'preview' ) {
2054                         $this->showPreview( $previewOutput );
2055                 }
2056
2057                 $wgOut->addHTML( '</div>' );
2058
2059                 if ( $this->formtype == 'diff') {
2060                         $this->showDiff();
2061                 }
2062         }
2063
2064         /**
2065          * Append preview output to $wgOut.
2066          * Includes category rendering if this is a category page.
2067          *
2068          * @param $text String: the HTML to be output for the preview.
2069          */
2070         protected function showPreview( $text ) {
2071                 global $wgOut;
2072                 if ( $this->mTitle->getNamespace() == NS_CATEGORY) {
2073                         $this->mArticle->openShowCategory();
2074                 }
2075                 # This hook seems slightly odd here, but makes things more
2076                 # consistent for extensions.
2077                 wfRunHooks( 'OutputPageBeforeHTML',array( &$wgOut, &$text ) );
2078                 $wgOut->addHTML( $text );
2079                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
2080                         $this->mArticle->closeShowCategory();
2081                 }
2082         }
2083
2084         /**
2085          * Get a diff between the current contents of the edit box and the
2086          * version of the page we're editing from.
2087          *
2088          * If this is a section edit, we'll replace the section as for final
2089          * save and then make a comparison.
2090          */
2091         function showDiff() {
2092                 $oldtext = $this->mArticle->fetchContent();
2093                 $newtext = $this->mArticle->replaceSection(
2094                         $this->section, $this->textbox1, $this->summary, $this->edittime );
2095
2096                 wfRunHooks( 'EditPageGetDiffText', array( $this, &$newtext ) );
2097
2098                 $newtext = $this->mArticle->preSaveTransform( $newtext );
2099                 $oldtitle = wfMsgExt( 'currentrev', array( 'parseinline' ) );
2100                 $newtitle = wfMsgExt( 'yourtext', array( 'parseinline' ) );
2101                 if ( $oldtext !== false  || $newtext != '' ) {
2102                         $de = new DifferenceEngine( $this->mArticle->getContext() );
2103                         $de->setText( $oldtext, $newtext );
2104                         $difftext = $de->getDiff( $oldtitle, $newtitle );
2105                         $de->showDiffStyle();
2106                 } else {
2107                         $difftext = '';
2108                 }
2109
2110                 global $wgOut;
2111                 $wgOut->addHTML( '<div id="wikiDiff">' . $difftext . '</div>' );
2112         }
2113
2114         /**
2115          * Give a chance for site and per-namespace customizations of
2116          * terms of service summary link that might exist separately
2117          * from the copyright notice.
2118          *
2119          * This will display between the save button and the edit tools,
2120          * so should remain short!
2121          */
2122         protected function showTosSummary() {
2123                 $msg = 'editpage-tos-summary';
2124                 wfRunHooks( 'EditPageTosSummary', array( $this->mTitle, &$msg ) );
2125                 if( !wfMessage( $msg )->isDisabled() ) {
2126                         global $wgOut;
2127                         $wgOut->addHTML( '<div class="mw-tos-summary">' );
2128                         $wgOut->addWikiMsg( $msg );
2129                         $wgOut->addHTML( '</div>' );
2130                 }
2131         }
2132
2133         protected function showEditTools() {
2134                 global $wgOut;
2135                 $wgOut->addHTML( '<div class="mw-editTools">' .
2136                         wfMessage( 'edittools' )->inContentLanguage()->parse() .
2137                         '</div>' );
2138         }
2139
2140         protected function getCopywarn() {
2141                 global $wgRightsText;
2142                 if ( $wgRightsText ) {
2143                         $copywarnMsg = array( 'copyrightwarning',
2144                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]',
2145                                 $wgRightsText );
2146                 } else {
2147                         $copywarnMsg = array( 'copyrightwarning2',
2148                                 '[[' . wfMsgForContent( 'copyrightpage' ) . ']]' );
2149                 }
2150                 // Allow for site and per-namespace customization of contribution/copyright notice.
2151                 wfRunHooks( 'EditPageCopyrightWarning', array( $this->mTitle, &$copywarnMsg ) );
2152
2153                 return "<div id=\"editpage-copywarn\">\n" .
2154                         call_user_func_array("wfMsgNoTrans", $copywarnMsg) . "\n</div>";
2155         }
2156
2157         protected function showStandardInputs( &$tabindex = 2 ) {
2158                 global $wgOut;
2159                 $wgOut->addHTML( "<div class='editOptions'>\n" );
2160
2161                 if ( $this->section != 'new' ) {
2162                         $this->showSummaryInput( false, $this->summary );
2163                         $wgOut->addHTML( $this->getSummaryPreview( false, $this->summary ) );
2164                 }
2165
2166                 $checkboxes = $this->getCheckboxes( $tabindex,
2167                         array( 'minor' => $this->minoredit, 'watch' => $this->watchthis ) );
2168                 $wgOut->addHTML( "<div class='editCheckboxes'>" . implode( $checkboxes, "\n" ) . "</div>\n" );
2169                 $wgOut->addHTML( "<div class='editButtons'>\n" );
2170                 $wgOut->addHTML( implode( $this->getEditButtons( $tabindex ), "\n" ) . "\n" );
2171
2172                 $cancel = $this->getCancelLink();
2173                 if ( $cancel !== '' ) {
2174                         $cancel .= wfMsgExt( 'pipe-separator' , 'escapenoentities' );
2175                 }
2176                 $edithelpurl = Skin::makeInternalOrExternalUrl( wfMsgForContent( 'edithelppage' ) );
2177                 $edithelp = '<a target="helpwindow" href="'.$edithelpurl.'">'.
2178                         htmlspecialchars( wfMsg( 'edithelp' ) ).'</a> '.
2179                         htmlspecialchars( wfMsg( 'newwindow' ) );
2180                 $wgOut->addHTML( "      <span class='editHelp'>{$cancel}{$edithelp}</span>\n" );
2181                 $wgOut->addHTML( "</div><!-- editButtons -->\n</div><!-- editOptions -->\n" );
2182         }
2183
2184         /**
2185          * Show an edit conflict. textbox1 is already shown in showEditForm().
2186          * If you want to use another entry point to this function, be careful.
2187          */
2188         protected function showConflict() {
2189                 global $wgOut;
2190                 $this->textbox2 = $this->textbox1;
2191                 $this->textbox1 = $this->getContent();
2192                 if ( wfRunHooks( 'EditPageBeforeConflictDiff', array( &$this, &$wgOut ) ) ) {
2193                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2194
2195                         $de = new DifferenceEngine( $this->mArticle->getContext() );
2196                         $de->setText( $this->textbox2, $this->textbox1 );
2197                         $de->showDiff( wfMsgExt( 'yourtext', 'parseinline' ), wfMsg( 'storedversion' ) );
2198
2199                         $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2200                         $this->showTextbox2();
2201                 }
2202         }
2203
2204         /**
2205          * @return string
2206          */
2207         public function getCancelLink() {
2208                 $cancelParams = array();
2209                 if ( !$this->isConflict && $this->mArticle->getOldID() > 0 ) {
2210                         $cancelParams['oldid'] = $this->mArticle->getOldID();
2211                 }
2212
2213                 return Linker::linkKnown(
2214                         $this->getContextTitle(),
2215                         wfMsgExt( 'cancel', array( 'parseinline' ) ),
2216                         array( 'id' => 'mw-editform-cancel' ),
2217                         $cancelParams
2218                 );
2219         }
2220
2221         /**
2222          * Returns the URL to use in the form's action attribute.
2223          * This is used by EditPage subclasses when simply customizing the action
2224          * variable in the constructor is not enough. This can be used when the
2225          * EditPage lives inside of a Special page rather than a custom page action.
2226          *
2227          * @param $title Title object for which is being edited (where we go to for &action= links)
2228          * @return string
2229          */
2230         protected function getActionURL( Title $title ) {
2231                 return $title->getLocalURL( array( 'action' => $this->action ) );
2232         }
2233
2234         /**
2235          * Check if a page was deleted while the user was editing it, before submit.
2236          * Note that we rely on the logging table, which hasn't been always there,
2237          * but that doesn't matter, because this only applies to brand new
2238          * deletes.
2239          */
2240         protected function wasDeletedSinceLastEdit() {
2241                 if ( $this->deletedSinceEdit !== null ) {
2242                         return $this->deletedSinceEdit;
2243                 }
2244
2245                 $this->deletedSinceEdit = false;
2246
2247                 if ( $this->mTitle->isDeletedQuick() ) {
2248                         $this->lastDelete = $this->getLastDelete();
2249                         if ( $this->lastDelete ) {
2250                                 $deleteTime = wfTimestamp( TS_MW, $this->lastDelete->log_timestamp );
2251                                 if ( $deleteTime > $this->starttime ) {
2252                                         $this->deletedSinceEdit = true;
2253                                 }
2254                         }
2255                 }
2256
2257                 return $this->deletedSinceEdit;
2258         }
2259
2260         protected function getLastDelete() {
2261                 $dbr = wfGetDB( DB_SLAVE );
2262                 $data = $dbr->selectRow(
2263                         array( 'logging', 'user' ),
2264                         array( 'log_type',
2265                                    'log_action',
2266                                    'log_timestamp',
2267                                    'log_user',
2268                                    'log_namespace',
2269                                    'log_title',
2270                                    'log_comment',
2271                                    'log_params',
2272                                    'log_deleted',
2273                                    'user_name' ),
2274                         array( 'log_namespace' => $this->mTitle->getNamespace(),
2275                                    'log_title' => $this->mTitle->getDBkey(),
2276                                    'log_type' => 'delete',
2277                                    'log_action' => 'delete',
2278                                    'user_id=log_user' ),
2279                         __METHOD__,
2280                         array( 'LIMIT' => 1, 'ORDER BY' => 'log_timestamp DESC' )
2281                 );
2282                 // Quick paranoid permission checks...
2283                 if( is_object( $data ) ) {
2284                         if( $data->log_deleted & LogPage::DELETED_USER )
2285                                 $data->user_name = wfMsgHtml( 'rev-deleted-user' );
2286                         if( $data->log_deleted & LogPage::DELETED_COMMENT )
2287                                 $data->log_comment = wfMsgHtml( 'rev-deleted-comment' );
2288                 }
2289                 return $data;
2290         }
2291
2292         /**
2293          * Get the rendered text for previewing.
2294          * @return string
2295          */
2296         function getPreviewText() {
2297                 global $wgOut, $wgUser, $wgParser;
2298
2299                 wfProfileIn( __METHOD__ );
2300
2301                 if ( $this->mTriedSave && !$this->mTokenOk ) {
2302                         if ( $this->mTokenOkExceptSuffix ) {
2303                                 $note = wfMsg( 'token_suffix_mismatch' );
2304                         } else {
2305                                 $note = wfMsg( 'session_fail_preview' );
2306                         }
2307                 } elseif ( $this->incompleteForm ) {
2308                         $note = wfMsg( 'edit_form_incomplete' );
2309                 } else {
2310                         $note = wfMsg( 'previewnote' );
2311                 }
2312
2313                 $parserOptions = ParserOptions::newFromUser( $wgUser );
2314                 $parserOptions->setEditSection( false );
2315                 $parserOptions->setIsPreview( true );
2316                 $parserOptions->setIsSectionPreview( !is_null($this->section) && $this->section !== '' );
2317
2318                 global $wgRawHtml;
2319                 if ( $wgRawHtml && !$this->mTokenOk ) {
2320                         // Could be an offsite preview attempt. This is very unsafe if
2321                         // HTML is enabled, as it could be an attack.
2322                         $parsedNote = '';
2323                         if ( $this->textbox1 !== '' ) {
2324                                 // Do not put big scary notice, if previewing the empty
2325                                 // string, which happens when you initially edit
2326                                 // a category page, due to automatic preview-on-open.
2327                                 $parsedNote = $wgOut->parse( "<div class='previewnote'>" .
2328                                         wfMsg( 'session_fail_preview_html' ) . "</div>", true, /* interface */true );
2329                         }
2330                         wfProfileOut( __METHOD__ );
2331                         return $parsedNote;
2332                 }
2333
2334                 # don't parse non-wikitext pages, show message about preview
2335                 # 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?
2336
2337                 if ( $this->isCssJsSubpage || !$this->mTitle->isWikitextPage() ) {
2338                         if( $this->mTitle->isCssJsSubpage() ) {
2339                                 $level = 'user';
2340                         } elseif( $this->mTitle->isCssOrJsPage() ) {
2341                                 $level = 'site';
2342                         } else {
2343                                 $level = false;
2344                         }
2345
2346                         # Used messages to make sure grep find them:
2347                         # Messages: usercsspreview, userjspreview, sitecsspreview, sitejspreview
2348                         if( $level ) {
2349                                 if (preg_match( "/\\.css$/", $this->mTitle->getText() ) ) {
2350                                         $previewtext = "<div id='mw-{$level}csspreview'>\n" . wfMsg( "{$level}csspreview" ) . "\n</div>";
2351                                         $class = "mw-code mw-css";
2352                                 } elseif (preg_match( "/\\.js$/", $this->mTitle->getText() ) ) {
2353                                         $previewtext = "<div id='mw-{$level}jspreview'>\n" . wfMsg( "{$level}jspreview" ) . "\n</div>";
2354                                         $class = "mw-code mw-js";
2355                                 } else {
2356                                         throw new MWException( 'A CSS/JS (sub)page but which is not css nor js!' );
2357                                 }
2358                         }
2359
2360                         $parserOptions->setTidy( true );
2361                         $parserOutput = $wgParser->parse( $previewtext, $this->mTitle, $parserOptions );
2362                         $previewHTML = $parserOutput->mText;
2363                         $previewHTML .= "<pre class=\"$class\" dir=\"ltr\">\n" . htmlspecialchars( $this->textbox1 ) . "\n</pre>\n";
2364                 } else {
2365                         $rt = Title::newFromRedirectArray( $this->textbox1 );
2366                         if ( $rt ) {
2367                                 $previewHTML = $this->mArticle->viewRedirect( $rt, false );
2368                         } else {
2369                                 $toparse = $this->textbox1;
2370
2371                                 # If we're adding a comment, we need to show the
2372                                 # summary as the headline
2373                                 if ( $this->section == "new" && $this->summary != "" ) {
2374                                         $toparse = "== {$this->summary} ==\n\n" . $toparse;
2375                                 }
2376
2377                                 wfRunHooks( 'EditPageGetPreviewText', array( $this, &$toparse ) );
2378
2379                                 $parserOptions->setTidy( true );
2380                                 $parserOptions->enableLimitReport();
2381                                 $parserOutput = $wgParser->parse( $this->mArticle->preSaveTransform( $toparse ),
2382                                         $this->mTitle, $parserOptions );
2383
2384                                 $previewHTML = $parserOutput->getText();
2385                                 $this->mParserOutput = $parserOutput;
2386                                 $wgOut->addParserOutputNoText( $parserOutput );
2387
2388                                 if ( count( $parserOutput->getWarnings() ) ) {
2389                                         $note .= "\n\n" . implode( "\n\n", $parserOutput->getWarnings() );
2390                                 }
2391                         }
2392                 }
2393
2394                 if( $this->isConflict ) {
2395                         $conflict = '<h2 id="mw-previewconflict">' . htmlspecialchars( wfMsg( 'previewconflict' ) ) . "</h2>\n";
2396                 } else {
2397                         $conflict = '<hr />';
2398                 }
2399
2400                 $previewhead = "<div class='previewnote'>\n" .
2401                         '<h2 id="mw-previewheader">' . htmlspecialchars( wfMsg( 'preview' ) ) . "</h2>" .
2402                         $wgOut->parse( $note, true, /* interface */true ) . $conflict . "</div>\n";
2403
2404                 $pageLang = $this->mTitle->getPageLanguage();
2405                 $attribs = array( 'lang' => $pageLang->getCode(), 'dir' => $pageLang->getDir(),
2406                         'class' => 'mw-content-'.$pageLang->getDir() );
2407                 $previewHTML = Html::rawElement( 'div', $attribs, $previewHTML );
2408
2409                 wfProfileOut( __METHOD__ );
2410                 return $previewhead . $previewHTML . $this->previewTextAfterContent;
2411         }
2412
2413         /**
2414          * @return Array
2415          */
2416         function getTemplates() {
2417                 if ( $this->preview || $this->section != '' ) {
2418                         $templates = array();
2419                         if ( !isset( $this->mParserOutput ) ) {
2420                                 return $templates;
2421                         }
2422                         foreach( $this->mParserOutput->getTemplates() as $ns => $template) {
2423                                 foreach( array_keys( $template ) as $dbk ) {
2424                                         $templates[] = Title::makeTitle($ns, $dbk);
2425                                 }
2426                         }
2427                         return $templates;
2428                 } else {
2429                         return $this->mArticle->getUsedTemplates();
2430                 }
2431         }
2432
2433         /**
2434          * Shows a bulletin board style toolbar for common editing functions.
2435          * It can be disabled in the user preferences.
2436          * The necessary JavaScript code can be found in skins/common/edit.js.
2437          *
2438          * @return string
2439          */
2440         static function getEditToolbar() {
2441                 global $wgStylePath, $wgContLang, $wgLang, $wgOut;
2442                 global $wgUseTeX, $wgEnableUploads, $wgForeignFileRepos;
2443
2444                 $imagesAvailable = $wgEnableUploads || count( $wgForeignFileRepos );
2445
2446                 /**
2447                  * $toolarray is an array of arrays each of which includes the
2448                  * filename of the button image (without path), the opening
2449                  * tag, the closing tag, optionally a sample text that is
2450                  * inserted between the two when no selection is highlighted
2451                  * and.  The tip text is shown when the user moves the mouse
2452                  * over the button.
2453                  *
2454                  * Also here: accesskeys (key), which are not used yet until
2455                  * someone can figure out a way to make them work in
2456                  * IE. However, we should make sure these keys are not defined
2457                  * on the edit page.
2458                  */
2459                 $toolarray = array(
2460                         array(
2461                                 'image'  => $wgLang->getImageFile( 'button-bold' ),
2462                                 'id'     => 'mw-editbutton-bold',
2463                                 'open'   => '\'\'\'',
2464                                 'close'  => '\'\'\'',
2465                                 'sample' => wfMsg( 'bold_sample' ),
2466                                 'tip'    => wfMsg( 'bold_tip' ),
2467                                 'key'    => 'B'
2468                         ),
2469                         array(
2470                                 'image'  => $wgLang->getImageFile( 'button-italic' ),
2471                                 'id'     => 'mw-editbutton-italic',
2472                                 'open'   => '\'\'',
2473                                 'close'  => '\'\'',
2474                                 'sample' => wfMsg( 'italic_sample' ),
2475                                 'tip'    => wfMsg( 'italic_tip' ),
2476                                 'key'    => 'I'
2477                         ),
2478                         array(
2479                                 'image'  => $wgLang->getImageFile( 'button-link' ),
2480                                 'id'     => 'mw-editbutton-link',
2481                                 'open'   => '[[',
2482                                 'close'  => ']]',
2483                                 'sample' => wfMsg( 'link_sample' ),
2484                                 'tip'    => wfMsg( 'link_tip' ),
2485                                 'key'    => 'L'
2486                         ),
2487                         array(
2488                                 'image'  => $wgLang->getImageFile( 'button-extlink' ),
2489                                 'id'     => 'mw-editbutton-extlink',
2490                                 'open'   => '[',
2491                                 'close'  => ']',
2492                                 'sample' => wfMsg( 'extlink_sample' ),
2493                                 'tip'    => wfMsg( 'extlink_tip' ),
2494                                 'key'    => 'X'
2495                         ),
2496                         array(
2497                                 'image'  => $wgLang->getImageFile( 'button-headline' ),
2498                                 'id'     => 'mw-editbutton-headline',
2499                                 'open'   => "\n== ",
2500                                 'close'  => " ==\n",
2501                                 'sample' => wfMsg( 'headline_sample' ),
2502                                 'tip'    => wfMsg( 'headline_tip' ),
2503                                 'key'    => 'H'
2504                         ),
2505                         $imagesAvailable ? array(
2506                                 'image'  => $wgLang->getImageFile( 'button-image' ),
2507                                 'id'     => 'mw-editbutton-image',
2508                                 'open'   => '[[' . $wgContLang->getNsText( NS_FILE ) . ':',
2509                                 'close'  => ']]',
2510                                 'sample' => wfMsg( 'image_sample' ),
2511                                 'tip'    => wfMsg( 'image_tip' ),
2512                                 'key'    => 'D',
2513                         ) : false,
2514                         $imagesAvailable ? array(
2515                                 'image'  => $wgLang->getImageFile( 'button-media' ),
2516                                 'id'     => 'mw-editbutton-media',
2517                                 'open'   => '[[' . $wgContLang->getNsText( NS_MEDIA ) . ':',
2518                                 'close'  => ']]',
2519                                 'sample' => wfMsg( 'media_sample' ),
2520                                 'tip'    => wfMsg( 'media_tip' ),
2521                                 'key'    => 'M'
2522                         ) : false,
2523                         $wgUseTeX ?     array(
2524                                 'image'  => $wgLang->getImageFile( 'button-math' ),
2525                                 'id'     => 'mw-editbutton-math',
2526                                 'open'   => "<math>",
2527                                 'close'  => "</math>",
2528                                 'sample' => wfMsg( 'math_sample' ),
2529                                 'tip'    => wfMsg( 'math_tip' ),
2530                                 'key'    => 'C'
2531                         ) : false,
2532                         array(
2533                                 'image'  => $wgLang->getImageFile( 'button-nowiki' ),
2534                                 'id'     => 'mw-editbutton-nowiki',
2535                                 'open'   => "<nowiki>",
2536                                 'close'  => "</nowiki>",
2537                                 'sample' => wfMsg( 'nowiki_sample' ),
2538                                 'tip'    => wfMsg( 'nowiki_tip' ),
2539                                 'key'    => 'N'
2540                         ),
2541                         array(
2542                                 'image'  => $wgLang->getImageFile( 'button-sig' ),
2543                                 'id'     => 'mw-editbutton-signature',
2544                                 'open'   => '--~~~~',
2545                                 'close'  => '',
2546                                 'sample' => '',
2547                                 'tip'    => wfMsg( 'sig_tip' ),
2548                                 'key'    => 'Y'
2549                         ),
2550                         array(
2551                                 'image'  => $wgLang->getImageFile( 'button-hr' ),
2552                                 'id'     => 'mw-editbutton-hr',
2553                                 'open'   => "\n----\n",
2554                                 'close'  => '',
2555                                 'sample' => '',
2556                                 'tip'    => wfMsg( 'hr_tip' ),
2557                                 'key'    => 'R'
2558                         )
2559                 );
2560
2561                 $script = '';
2562                 foreach ( $toolarray as $tool ) {
2563                         if ( !$tool ) {
2564                                 continue;
2565                         }
2566
2567                         $params = array(
2568                                 $image = $wgStylePath . '/common/images/' . $tool['image'],
2569                                 // Note that we use the tip both for the ALT tag and the TITLE tag of the image.
2570                                 // Older browsers show a "speedtip" type message only for ALT.
2571                                 // Ideally these should be different, realistically they
2572                                 // probably don't need to be.
2573                                 $tip = $tool['tip'],
2574                                 $open = $tool['open'],
2575                                 $close = $tool['close'],
2576                                 $sample = $tool['sample'],
2577                                 $cssId = $tool['id'],
2578                         );
2579
2580                         $script .= Xml::encodeJsCall( 'mw.toolbar.addButton', $params );
2581                 }
2582                 $wgOut->addScript( Html::inlineScript( ResourceLoader::makeLoaderConditionalScript( $script ) ) );
2583
2584                 $toolbar = '<div id="toolbar"></div>';
2585
2586                 wfRunHooks( 'EditPageBeforeEditToolbar', array( &$toolbar ) );
2587
2588                 return $toolbar;
2589         }
2590
2591         /**
2592          * Returns an array of html code of the following checkboxes:
2593          * minor and watch
2594          *
2595          * @param $tabindex Current tabindex
2596          * @param $checked Array of checkbox => bool, where bool indicates the checked
2597          *                 status of the checkbox
2598          *
2599          * @return array
2600          */
2601         public function getCheckboxes( &$tabindex, $checked ) {
2602                 global $wgUser;
2603
2604                 $checkboxes = array();
2605
2606                 // don't show the minor edit checkbox if it's a new page or section
2607                 if ( !$this->isNew ) {
2608                         $checkboxes['minor'] = '';
2609                         $minorLabel = wfMsgExt( 'minoredit', array( 'parseinline' ) );
2610                         if ( $wgUser->isAllowed( 'minoredit' ) ) {
2611                                 $attribs = array(
2612                                         'tabindex'  => ++$tabindex,
2613                                         'accesskey' => wfMsg( 'accesskey-minoredit' ),
2614                                         'id'        => 'wpMinoredit',
2615                                 );
2616                                 $checkboxes['minor'] =
2617                                         Xml::check( 'wpMinoredit', $checked['minor'], $attribs ) .
2618                                         "&#160;<label for='wpMinoredit' id='mw-editpage-minoredit'" .
2619                                         Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'minoredit', 'withaccess' ) ) ) .
2620                                         ">{$minorLabel}</label>";
2621                         }
2622                 }
2623
2624                 $watchLabel = wfMsgExt( 'watchthis', array( 'parseinline' ) );
2625                 $checkboxes['watch'] = '';
2626                 if ( $wgUser->isLoggedIn() ) {
2627                         $attribs = array(
2628                                 'tabindex'  => ++$tabindex,
2629                                 'accesskey' => wfMsg( 'accesskey-watch' ),
2630                                 'id'        => 'wpWatchthis',
2631                         );
2632                         $checkboxes['watch'] =
2633                                 Xml::check( 'wpWatchthis', $checked['watch'], $attribs ) .
2634                                 "&#160;<label for='wpWatchthis' id='mw-editpage-watch'" .
2635                                 Xml::expandAttributes( array( 'title' => Linker::titleAttrib( 'watch', 'withaccess' ) ) ) .
2636                                 ">{$watchLabel}</label>";
2637                 }
2638                 wfRunHooks( 'EditPageBeforeEditChecks', array( &$this, &$checkboxes, &$tabindex ) );
2639                 return $checkboxes;
2640         }
2641
2642         /**
2643          * Returns an array of html code of the following buttons:
2644          * save, diff, preview and live
2645          *
2646          * @param $tabindex Current tabindex
2647          *
2648          * @return array
2649          */
2650         public function getEditButtons( &$tabindex ) {
2651                 $buttons = array();
2652
2653                 $temp = array(
2654                         'id'        => 'wpSave',
2655                         'name'      => 'wpSave',
2656                         'type'      => 'submit',
2657                         'tabindex'  => ++$tabindex,
2658                         'value'     => wfMsg( 'savearticle' ),
2659                         'accesskey' => wfMsg( 'accesskey-save' ),
2660                         'title'     => wfMsg( 'tooltip-save' ).' ['.wfMsg( 'accesskey-save' ).']',
2661                 );
2662                 $buttons['save'] = Xml::element('input', $temp, '');
2663
2664                 ++$tabindex; // use the same for preview and live preview
2665                 $temp = array(
2666                         'id'        => 'wpPreview',
2667                         'name'      => 'wpPreview',
2668                         'type'      => 'submit',
2669                         'tabindex'  => $tabindex,
2670                         'value'     => wfMsg( 'showpreview' ),
2671                         'accesskey' => wfMsg( 'accesskey-preview' ),
2672                         'title'     => wfMsg( 'tooltip-preview' ) . ' [' . wfMsg( 'accesskey-preview' ) . ']',
2673                 );
2674                 $buttons['preview'] = Xml::element( 'input', $temp, '' );
2675                 $buttons['live'] = '';
2676
2677                 $temp = array(
2678                         'id'        => 'wpDiff',
2679                         'name'      => 'wpDiff',
2680                         'type'      => 'submit',
2681                         'tabindex'  => ++$tabindex,
2682                         'value'     => wfMsg( 'showdiff' ),
2683                         'accesskey' => wfMsg( 'accesskey-diff' ),
2684                         'title'     => wfMsg( 'tooltip-diff' ) . ' [' . wfMsg( 'accesskey-diff' ) . ']',
2685                 );
2686                 $buttons['diff'] = Xml::element( 'input', $temp, '' );
2687
2688                 wfRunHooks( 'EditPageBeforeEditButtons', array( &$this, &$buttons, &$tabindex ) );
2689                 return $buttons;
2690         }
2691
2692         /**
2693          * Output preview text only. This can be sucked into the edit page
2694          * via JavaScript, and saves the server time rendering the skin as
2695          * well as theoretically being more robust on the client (doesn't
2696          * disturb the edit box's undo history, won't eat your text on
2697          * failure, etc).
2698          *
2699          * @todo This doesn't include category or interlanguage links.
2700          *       Would need to enhance it a bit, <s>maybe wrap them in XML
2701          *       or something...</s> that might also require more skin
2702          *       initialization, so check whether that's a problem.
2703          */
2704         function livePreview() {
2705                 global $wgOut;
2706                 $wgOut->disable();
2707                 header( 'Content-type: text/xml; charset=utf-8' );
2708                 header( 'Cache-control: no-cache' );
2709
2710                 $previewText = $this->getPreviewText();
2711                 #$categories = $skin->getCategoryLinks();
2712
2713                 $s =
2714                 '<?xml version="1.0" encoding="UTF-8" ?>' . "\n" .
2715                 Xml::tags( 'livepreview', null,
2716                         Xml::element( 'preview', null, $previewText )
2717                         #.      Xml::element( 'category', null, $categories )
2718                 );
2719                 echo $s;
2720         }
2721
2722         /**
2723          * Call the stock "user is blocked" page
2724          *
2725          * @deprecated in 1.19; throw an exception directly instead
2726          */
2727         function blockedPage() {
2728                 global $wgUser;
2729
2730                 throw new UserBlockedError( $wgUser->mBlock );
2731         }
2732
2733         /**
2734          * Produce the stock "please login to edit pages" page
2735          *
2736          * @deprecated in 1.19; throw an exception directly instead
2737          */
2738         function userNotLoggedInPage() {
2739                 throw new PermissionsError( 'edit' );
2740         }
2741
2742         /**
2743          * Show an error page saying to the user that he has insufficient permissions
2744          * to create a new page
2745          *
2746          * @deprecated in 1.19; throw an exception directly instead
2747          */
2748         function noCreatePermission() {
2749                 $permission = $this->mTitle->isTalkPage() ? 'createtalk' : 'createpage';
2750                 throw new PermissionsError( $permission );
2751         }
2752
2753         /**
2754          * Creates a basic error page which informs the user that
2755          * they have attempted to edit a nonexistent section.
2756          */
2757         function noSuchSectionPage() {
2758                 global $wgOut;
2759
2760                 $wgOut->prepareErrorPage( wfMessage( 'nosuchsectiontitle' ) );
2761
2762                 $res = wfMsgExt( 'nosuchsectiontext', 'parse', $this->section );
2763                 wfRunHooks( 'EditPageNoSuchSection', array( &$this, &$res ) );
2764                 $wgOut->addHTML( $res );
2765
2766                 $wgOut->returnToMain( false, $this->mTitle );
2767         }
2768
2769         /**
2770          * Produce the stock "your edit contains spam" page
2771          *
2772          * @param $match Text which triggered one or more filters
2773          * @deprecated since 1.17 Use method spamPageWithContent() instead
2774          */
2775         static function spamPage( $match = false ) {
2776                 global $wgOut, $wgTitle;
2777
2778                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
2779
2780                 $wgOut->addHTML( '<div id="spamprotected">' );
2781                 $wgOut->addWikiMsg( 'spamprotectiontext' );
2782                 if ( $match ) {
2783                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
2784                 }
2785                 $wgOut->addHTML( '</div>' );
2786
2787                 $wgOut->returnToMain( false, $wgTitle );
2788         }
2789
2790         /**
2791          * Show "your edit contains spam" page with your diff and text
2792          *
2793          * @param $match Text which triggered one or more filters
2794          */
2795         public function spamPageWithContent( $match = false ) {
2796                 global $wgOut;
2797                 $this->textbox2 = $this->textbox1;
2798
2799                 $wgOut->prepareErrorPage( wfMessage( 'spamprotectiontitle' ) );
2800
2801                 $wgOut->addHTML( '<div id="spamprotected">' );
2802                 $wgOut->addWikiMsg( 'spamprotectiontext' );
2803                 if ( $match ) {
2804                         $wgOut->addWikiMsg( 'spamprotectionmatch', wfEscapeWikiText( $match ) );
2805                 }
2806                 $wgOut->addHTML( '</div>' );
2807
2808                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourdiff" );
2809                 $de = new DifferenceEngine( $this->mArticle->getContext() );
2810                 $de->setText( $this->getContent(), $this->textbox2 );
2811                 $de->showDiff( wfMsg( "storedversion" ), wfMsgExt( 'yourtext', 'parseinline' ) );
2812
2813                 $wgOut->wrapWikiMsg( '<h2>$1</h2>', "yourtext" );
2814                 $this->showTextbox2();
2815
2816                 $wgOut->addReturnTo( $this->getContextTitle(), array( 'action' => 'edit' ) );
2817         }
2818
2819         /**
2820          * Format an anchor fragment as it would appear for a given section name
2821          * @param $text String
2822          * @return String
2823          * @private
2824          */
2825         function sectionAnchor( $text ) {
2826                 global $wgParser;
2827                 return $wgParser->guessSectionNameFromWikiText( $text );
2828         }
2829
2830         /**
2831          * Check if the browser is on a blacklist of user-agents known to
2832          * mangle UTF-8 data on form submission. Returns true if Unicode
2833          * should make it through, false if it's known to be a problem.
2834          * @return bool
2835          * @private
2836          */
2837         function checkUnicodeCompliantBrowser() {
2838                 global $wgBrowserBlackList;
2839                 if ( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
2840                         // No User-Agent header sent? Trust it by default...
2841                         return true;
2842                 }
2843                 $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
2844                 foreach ( $wgBrowserBlackList as $browser ) {
2845                         if ( preg_match($browser, $currentbrowser) ) {
2846                                 return false;
2847                         }
2848                 }
2849                 return true;
2850         }
2851
2852         /**
2853          * Filter an input field through a Unicode de-armoring process if it
2854          * came from an old browser with known broken Unicode editing issues.
2855          *
2856          * @param $request WebRequest
2857          * @param $field String
2858          * @return String
2859          * @private
2860          */
2861         function safeUnicodeInput( $request, $field ) {
2862                 $text = rtrim( $request->getText( $field ) );
2863                 return $request->getBool( 'safemode' )
2864                         ? $this->unmakesafe( $text )
2865                         : $text;
2866         }
2867
2868         /**
2869          * @param $request WebRequest
2870          * @param $text string
2871          * @return string
2872          */
2873         function safeUnicodeText( $request, $text ) {
2874                 $text = rtrim( $text );
2875                 return $request->getBool( 'safemode' )
2876                         ? $this->unmakesafe( $text )
2877                         : $text;
2878         }
2879
2880         /**
2881          * Filter an output field through a Unicode armoring process if it is
2882          * going to an old browser with known broken Unicode editing issues.
2883          *
2884          * @param $text String
2885          * @return String
2886          * @private
2887          */
2888         function safeUnicodeOutput( $text ) {
2889                 global $wgContLang;
2890                 $codedText = $wgContLang->recodeForEdit( $text );
2891                 return $this->checkUnicodeCompliantBrowser()
2892                         ? $codedText
2893                         : $this->makesafe( $codedText );
2894         }
2895
2896         /**
2897          * A number of web browsers are known to corrupt non-ASCII characters
2898          * in a UTF-8 text editing environment. To protect against this,
2899          * detected browsers will be served an armored version of the text,
2900          * with non-ASCII chars converted to numeric HTML character references.
2901          *
2902          * Preexisting such character references will have a 0 added to them
2903          * to ensure that round-trips do not alter the original data.
2904          *
2905          * @param $invalue String
2906          * @return String
2907          * @private
2908          */
2909         function makesafe( $invalue ) {
2910                 // Armor existing references for reversability.
2911                 $invalue = strtr( $invalue, array( "&#x" => "&#x0" ) );
2912
2913                 $bytesleft = 0;
2914                 $result = "";
2915                 $working = 0;
2916                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2917                         $bytevalue = ord( $invalue[$i] );
2918                         if ( $bytevalue <= 0x7F ) { //0xxx xxxx
2919                                 $result .= chr( $bytevalue );
2920                                 $bytesleft = 0;
2921                         } elseif ( $bytevalue <= 0xBF ) { //10xx xxxx
2922                                 $working = $working << 6;
2923                                 $working += ($bytevalue & 0x3F);
2924                                 $bytesleft--;
2925                                 if ( $bytesleft <= 0 ) {
2926                                         $result .= "&#x" . strtoupper( dechex( $working ) ) . ";";
2927                                 }
2928                         } elseif ( $bytevalue <= 0xDF ) { //110x xxxx
2929                                 $working = $bytevalue & 0x1F;
2930                                 $bytesleft = 1;
2931                         } elseif ( $bytevalue <= 0xEF ) { //1110 xxxx
2932                                 $working = $bytevalue & 0x0F;
2933                                 $bytesleft = 2;
2934                         } else { //1111 0xxx
2935                                 $working = $bytevalue & 0x07;
2936                                 $bytesleft = 3;
2937                         }
2938                 }
2939                 return $result;
2940         }
2941
2942         /**
2943          * Reverse the previously applied transliteration of non-ASCII characters
2944          * back to UTF-8. Used to protect data from corruption by broken web browsers
2945          * as listed in $wgBrowserBlackList.
2946          *
2947          * @param $invalue String
2948          * @return String
2949          * @private
2950          */
2951         function unmakesafe( $invalue ) {
2952                 $result = "";
2953                 for( $i = 0; $i < strlen( $invalue ); $i++ ) {
2954                         if ( ( substr( $invalue, $i, 3 ) == "&#x" ) && ( $invalue[$i+3] != '0' ) ) {
2955                                 $i += 3;
2956                                 $hexstring = "";
2957                                 do {
2958                                         $hexstring .= $invalue[$i];
2959                                         $i++;
2960                                 } while( ctype_xdigit( $invalue[$i] ) && ( $i < strlen( $invalue ) ) );
2961
2962                                 // Do some sanity checks. These aren't needed for reversability,
2963                                 // but should help keep the breakage down if the editor
2964                                 // breaks one of the entities whilst editing.
2965                                 if ( (substr($invalue,$i,1)==";") and (strlen($hexstring) <= 6) ) {
2966                                         $codepoint = hexdec($hexstring);
2967                                         $result .= codepointToUtf8( $codepoint );
2968                                 } else {
2969                                         $result .= "&#x" . $hexstring . substr( $invalue, $i, 1 );
2970                                 }
2971                         } else {
2972                                 $result .= substr( $invalue, $i, 1 );
2973                         }
2974                 }
2975                 // reverse the transform that we made for reversability reasons.
2976                 return strtr( $result, array( "&#x0" => "&#x" ) );
2977         }
2978 }